/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/CodeGen/CGObjCMac.cpp
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1 | | //===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===// |
2 | | // |
3 | | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | | // See https://llvm.org/LICENSE.txt for license information. |
5 | | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | | // |
7 | | //===----------------------------------------------------------------------===// |
8 | | // |
9 | | // This provides Objective-C code generation targeting the Apple runtime. |
10 | | // |
11 | | //===----------------------------------------------------------------------===// |
12 | | |
13 | | #include "CGBlocks.h" |
14 | | #include "CGCleanup.h" |
15 | | #include "CGObjCRuntime.h" |
16 | | #include "CGRecordLayout.h" |
17 | | #include "CodeGenFunction.h" |
18 | | #include "CodeGenModule.h" |
19 | | #include "clang/AST/ASTContext.h" |
20 | | #include "clang/AST/Attr.h" |
21 | | #include "clang/AST/Decl.h" |
22 | | #include "clang/AST/DeclObjC.h" |
23 | | #include "clang/AST/Mangle.h" |
24 | | #include "clang/AST/RecordLayout.h" |
25 | | #include "clang/AST/StmtObjC.h" |
26 | | #include "clang/Basic/CodeGenOptions.h" |
27 | | #include "clang/Basic/LangOptions.h" |
28 | | #include "clang/CodeGen/CGFunctionInfo.h" |
29 | | #include "clang/CodeGen/ConstantInitBuilder.h" |
30 | | #include "llvm/ADT/CachedHashString.h" |
31 | | #include "llvm/ADT/DenseSet.h" |
32 | | #include "llvm/ADT/SetVector.h" |
33 | | #include "llvm/ADT/SmallPtrSet.h" |
34 | | #include "llvm/ADT/SmallString.h" |
35 | | #include "llvm/ADT/UniqueVector.h" |
36 | | #include "llvm/IR/DataLayout.h" |
37 | | #include "llvm/IR/InlineAsm.h" |
38 | | #include "llvm/IR/IntrinsicInst.h" |
39 | | #include "llvm/IR/LLVMContext.h" |
40 | | #include "llvm/IR/Module.h" |
41 | | #include "llvm/Support/ScopedPrinter.h" |
42 | | #include "llvm/Support/raw_ostream.h" |
43 | | #include <cstdio> |
44 | | |
45 | | using namespace clang; |
46 | | using namespace CodeGen; |
47 | | |
48 | | namespace { |
49 | | |
50 | | // FIXME: We should find a nicer way to make the labels for metadata, string |
51 | | // concatenation is lame. |
52 | | |
53 | | class ObjCCommonTypesHelper { |
54 | | protected: |
55 | | llvm::LLVMContext &VMContext; |
56 | | |
57 | | private: |
58 | | // The types of these functions don't really matter because we |
59 | | // should always bitcast before calling them. |
60 | | |
61 | | /// id objc_msgSend (id, SEL, ...) |
62 | | /// |
63 | | /// The default messenger, used for sends whose ABI is unchanged from |
64 | | /// the all-integer/pointer case. |
65 | 11.6k | llvm::FunctionCallee getMessageSendFn() const { |
66 | | // Add the non-lazy-bind attribute, since objc_msgSend is likely to |
67 | | // be called a lot. |
68 | 11.6k | llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy }; |
69 | 11.6k | return CGM.CreateRuntimeFunction( |
70 | 11.6k | llvm::FunctionType::get(ObjectPtrTy, params, true), "objc_msgSend", |
71 | 11.6k | llvm::AttributeList::get(CGM.getLLVMContext(), |
72 | 11.6k | llvm::AttributeList::FunctionIndex, |
73 | 11.6k | llvm::Attribute::NonLazyBind)); |
74 | 11.6k | } |
75 | | |
76 | | /// void objc_msgSend_stret (id, SEL, ...) |
77 | | /// |
78 | | /// The messenger used when the return value is an aggregate returned |
79 | | /// by indirect reference in the first argument, and therefore the |
80 | | /// self and selector parameters are shifted over by one. |
81 | 15 | llvm::FunctionCallee getMessageSendStretFn() const { |
82 | 15 | llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy }; |
83 | 15 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy, |
84 | 15 | params, true), |
85 | 15 | "objc_msgSend_stret"); |
86 | 15 | } |
87 | | |
88 | | /// [double | long double] objc_msgSend_fpret(id self, SEL op, ...) |
89 | | /// |
90 | | /// The messenger used when the return value is returned on the x87 |
91 | | /// floating-point stack; without a special entrypoint, the nil case |
92 | | /// would be unbalanced. |
93 | 6 | llvm::FunctionCallee getMessageSendFpretFn() const { |
94 | 6 | llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy }; |
95 | 6 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.DoubleTy, |
96 | 6 | params, true), |
97 | 6 | "objc_msgSend_fpret"); |
98 | 6 | } |
99 | | |
100 | | /// _Complex long double objc_msgSend_fp2ret(id self, SEL op, ...) |
101 | | /// |
102 | | /// The messenger used when the return value is returned in two values on the |
103 | | /// x87 floating point stack; without a special entrypoint, the nil case |
104 | | /// would be unbalanced. Only used on 64-bit X86. |
105 | 1 | llvm::FunctionCallee getMessageSendFp2retFn() const { |
106 | 1 | llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy }; |
107 | 1 | llvm::Type *longDoubleType = llvm::Type::getX86_FP80Ty(VMContext); |
108 | 1 | llvm::Type *resultType = |
109 | 1 | llvm::StructType::get(longDoubleType, longDoubleType); |
110 | | |
111 | 1 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(resultType, |
112 | 1 | params, true), |
113 | 1 | "objc_msgSend_fp2ret"); |
114 | 1 | } |
115 | | |
116 | | /// id objc_msgSendSuper(struct objc_super *super, SEL op, ...) |
117 | | /// |
118 | | /// The messenger used for super calls, which have different dispatch |
119 | | /// semantics. The class passed is the superclass of the current |
120 | | /// class. |
121 | 21 | llvm::FunctionCallee getMessageSendSuperFn() const { |
122 | 21 | llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy }; |
123 | 21 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
124 | 21 | params, true), |
125 | 21 | "objc_msgSendSuper"); |
126 | 21 | } |
127 | | |
128 | | /// id objc_msgSendSuper2(struct objc_super *super, SEL op, ...) |
129 | | /// |
130 | | /// A slightly different messenger used for super calls. The class |
131 | | /// passed is the current class. |
132 | 473 | llvm::FunctionCallee getMessageSendSuperFn2() const { |
133 | 473 | llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy }; |
134 | 473 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
135 | 473 | params, true), |
136 | 473 | "objc_msgSendSuper2"); |
137 | 473 | } |
138 | | |
139 | | /// void objc_msgSendSuper_stret(void *stretAddr, struct objc_super *super, |
140 | | /// SEL op, ...) |
141 | | /// |
142 | | /// The messenger used for super calls which return an aggregate indirectly. |
143 | 2 | llvm::FunctionCallee getMessageSendSuperStretFn() const { |
144 | 2 | llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy }; |
145 | 2 | return CGM.CreateRuntimeFunction( |
146 | 2 | llvm::FunctionType::get(CGM.VoidTy, params, true), |
147 | 2 | "objc_msgSendSuper_stret"); |
148 | 2 | } |
149 | | |
150 | | /// void objc_msgSendSuper2_stret(void * stretAddr, struct objc_super *super, |
151 | | /// SEL op, ...) |
152 | | /// |
153 | | /// objc_msgSendSuper_stret with the super2 semantics. |
154 | 2 | llvm::FunctionCallee getMessageSendSuperStretFn2() const { |
155 | 2 | llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy }; |
156 | 2 | return CGM.CreateRuntimeFunction( |
157 | 2 | llvm::FunctionType::get(CGM.VoidTy, params, true), |
158 | 2 | "objc_msgSendSuper2_stret"); |
159 | 2 | } |
160 | | |
161 | 0 | llvm::FunctionCallee getMessageSendSuperFpretFn() const { |
162 | | // There is no objc_msgSendSuper_fpret? How can that work? |
163 | 0 | return getMessageSendSuperFn(); |
164 | 0 | } |
165 | | |
166 | 0 | llvm::FunctionCallee getMessageSendSuperFpretFn2() const { |
167 | | // There is no objc_msgSendSuper_fpret? How can that work? |
168 | 0 | return getMessageSendSuperFn2(); |
169 | 0 | } |
170 | | |
171 | | protected: |
172 | | CodeGen::CodeGenModule &CGM; |
173 | | |
174 | | public: |
175 | | llvm::IntegerType *ShortTy, *IntTy, *LongTy; |
176 | | llvm::PointerType *Int8PtrTy, *Int8PtrPtrTy; |
177 | | llvm::Type *IvarOffsetVarTy; |
178 | | |
179 | | /// ObjectPtrTy - LLVM type for object handles (typeof(id)) |
180 | | llvm::PointerType *ObjectPtrTy; |
181 | | |
182 | | /// PtrObjectPtrTy - LLVM type for id * |
183 | | llvm::PointerType *PtrObjectPtrTy; |
184 | | |
185 | | /// SelectorPtrTy - LLVM type for selector handles (typeof(SEL)) |
186 | | llvm::PointerType *SelectorPtrTy; |
187 | | |
188 | | private: |
189 | | /// ProtocolPtrTy - LLVM type for external protocol handles |
190 | | /// (typeof(Protocol)) |
191 | | llvm::Type *ExternalProtocolPtrTy; |
192 | | |
193 | | public: |
194 | 16 | llvm::Type *getExternalProtocolPtrTy() { |
195 | 16 | if (!ExternalProtocolPtrTy) { |
196 | | // FIXME: It would be nice to unify this with the opaque type, so that the |
197 | | // IR comes out a bit cleaner. |
198 | 10 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
199 | 10 | ASTContext &Ctx = CGM.getContext(); |
200 | 10 | llvm::Type *T = Types.ConvertType(Ctx.getObjCProtoType()); |
201 | 10 | ExternalProtocolPtrTy = llvm::PointerType::getUnqual(T); |
202 | 10 | } |
203 | | |
204 | 16 | return ExternalProtocolPtrTy; |
205 | 16 | } |
206 | | |
207 | | // SuperCTy - clang type for struct objc_super. |
208 | | QualType SuperCTy; |
209 | | // SuperPtrCTy - clang type for struct objc_super *. |
210 | | QualType SuperPtrCTy; |
211 | | |
212 | | /// SuperTy - LLVM type for struct objc_super. |
213 | | llvm::StructType *SuperTy; |
214 | | /// SuperPtrTy - LLVM type for struct objc_super *. |
215 | | llvm::PointerType *SuperPtrTy; |
216 | | |
217 | | /// PropertyTy - LLVM type for struct objc_property (struct _prop_t |
218 | | /// in GCC parlance). |
219 | | llvm::StructType *PropertyTy; |
220 | | |
221 | | /// PropertyListTy - LLVM type for struct objc_property_list |
222 | | /// (_prop_list_t in GCC parlance). |
223 | | llvm::StructType *PropertyListTy; |
224 | | /// PropertyListPtrTy - LLVM type for struct objc_property_list*. |
225 | | llvm::PointerType *PropertyListPtrTy; |
226 | | |
227 | | // MethodTy - LLVM type for struct objc_method. |
228 | | llvm::StructType *MethodTy; |
229 | | |
230 | | /// CacheTy - LLVM type for struct objc_cache. |
231 | | llvm::Type *CacheTy; |
232 | | /// CachePtrTy - LLVM type for struct objc_cache *. |
233 | | llvm::PointerType *CachePtrTy; |
234 | | |
235 | 103 | llvm::FunctionCallee getGetPropertyFn() { |
236 | 103 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
237 | 103 | ASTContext &Ctx = CGM.getContext(); |
238 | | // id objc_getProperty (id, SEL, ptrdiff_t, bool) |
239 | 103 | CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType()); |
240 | 103 | CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType()); |
241 | 103 | CanQualType Params[] = { |
242 | 103 | IdType, SelType, |
243 | 103 | Ctx.getPointerDiffType()->getCanonicalTypeUnqualified(), Ctx.BoolTy}; |
244 | 103 | llvm::FunctionType *FTy = |
245 | 103 | Types.GetFunctionType( |
246 | 103 | Types.arrangeBuiltinFunctionDeclaration(IdType, Params)); |
247 | 103 | return CGM.CreateRuntimeFunction(FTy, "objc_getProperty"); |
248 | 103 | } |
249 | | |
250 | 63 | llvm::FunctionCallee getSetPropertyFn() { |
251 | 63 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
252 | 63 | ASTContext &Ctx = CGM.getContext(); |
253 | | // void objc_setProperty (id, SEL, ptrdiff_t, id, bool, bool) |
254 | 63 | CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType()); |
255 | 63 | CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType()); |
256 | 63 | CanQualType Params[] = { |
257 | 63 | IdType, |
258 | 63 | SelType, |
259 | 63 | Ctx.getPointerDiffType()->getCanonicalTypeUnqualified(), |
260 | 63 | IdType, |
261 | 63 | Ctx.BoolTy, |
262 | 63 | Ctx.BoolTy}; |
263 | 63 | llvm::FunctionType *FTy = |
264 | 63 | Types.GetFunctionType( |
265 | 63 | Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params)); |
266 | 63 | return CGM.CreateRuntimeFunction(FTy, "objc_setProperty"); |
267 | 63 | } |
268 | | |
269 | 86 | llvm::FunctionCallee getOptimizedSetPropertyFn(bool atomic, bool copy) { |
270 | 86 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
271 | 86 | ASTContext &Ctx = CGM.getContext(); |
272 | | // void objc_setProperty_atomic(id self, SEL _cmd, |
273 | | // id newValue, ptrdiff_t offset); |
274 | | // void objc_setProperty_nonatomic(id self, SEL _cmd, |
275 | | // id newValue, ptrdiff_t offset); |
276 | | // void objc_setProperty_atomic_copy(id self, SEL _cmd, |
277 | | // id newValue, ptrdiff_t offset); |
278 | | // void objc_setProperty_nonatomic_copy(id self, SEL _cmd, |
279 | | // id newValue, ptrdiff_t offset); |
280 | | |
281 | 86 | SmallVector<CanQualType,4> Params; |
282 | 86 | CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType()); |
283 | 86 | CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType()); |
284 | 86 | Params.push_back(IdType); |
285 | 86 | Params.push_back(SelType); |
286 | 86 | Params.push_back(IdType); |
287 | 86 | Params.push_back(Ctx.getPointerDiffType()->getCanonicalTypeUnqualified()); |
288 | 86 | llvm::FunctionType *FTy = |
289 | 86 | Types.GetFunctionType( |
290 | 86 | Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params)); |
291 | 86 | const char *name; |
292 | 86 | if (atomic && copy45 ) |
293 | 3 | name = "objc_setProperty_atomic_copy"; |
294 | 83 | else if (atomic && !copy42 ) |
295 | 42 | name = "objc_setProperty_atomic"; |
296 | 41 | else if (!atomic && copy) |
297 | 3 | name = "objc_setProperty_nonatomic_copy"; |
298 | 38 | else |
299 | 38 | name = "objc_setProperty_nonatomic"; |
300 | | |
301 | 86 | return CGM.CreateRuntimeFunction(FTy, name); |
302 | 86 | } |
303 | | |
304 | 49 | llvm::FunctionCallee getCopyStructFn() { |
305 | 49 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
306 | 49 | ASTContext &Ctx = CGM.getContext(); |
307 | | // void objc_copyStruct (void *, const void *, size_t, bool, bool) |
308 | 49 | SmallVector<CanQualType,5> Params; |
309 | 49 | Params.push_back(Ctx.VoidPtrTy); |
310 | 49 | Params.push_back(Ctx.VoidPtrTy); |
311 | 49 | Params.push_back(Ctx.getSizeType()); |
312 | 49 | Params.push_back(Ctx.BoolTy); |
313 | 49 | Params.push_back(Ctx.BoolTy); |
314 | 49 | llvm::FunctionType *FTy = |
315 | 49 | Types.GetFunctionType( |
316 | 49 | Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params)); |
317 | 49 | return CGM.CreateRuntimeFunction(FTy, "objc_copyStruct"); |
318 | 49 | } |
319 | | |
320 | | /// This routine declares and returns address of: |
321 | | /// void objc_copyCppObjectAtomic( |
322 | | /// void *dest, const void *src, |
323 | | /// void (*copyHelper) (void *dest, const void *source)); |
324 | 9 | llvm::FunctionCallee getCppAtomicObjectFunction() { |
325 | 9 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
326 | 9 | ASTContext &Ctx = CGM.getContext(); |
327 | | /// void objc_copyCppObjectAtomic(void *dest, const void *src, void *helper); |
328 | 9 | SmallVector<CanQualType,3> Params; |
329 | 9 | Params.push_back(Ctx.VoidPtrTy); |
330 | 9 | Params.push_back(Ctx.VoidPtrTy); |
331 | 9 | Params.push_back(Ctx.VoidPtrTy); |
332 | 9 | llvm::FunctionType *FTy = |
333 | 9 | Types.GetFunctionType( |
334 | 9 | Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params)); |
335 | 9 | return CGM.CreateRuntimeFunction(FTy, "objc_copyCppObjectAtomic"); |
336 | 9 | } |
337 | | |
338 | 72 | llvm::FunctionCallee getEnumerationMutationFn() { |
339 | 72 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
340 | 72 | ASTContext &Ctx = CGM.getContext(); |
341 | | // void objc_enumerationMutation (id) |
342 | 72 | SmallVector<CanQualType,1> Params; |
343 | 72 | Params.push_back(Ctx.getCanonicalParamType(Ctx.getObjCIdType())); |
344 | 72 | llvm::FunctionType *FTy = |
345 | 72 | Types.GetFunctionType( |
346 | 72 | Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params)); |
347 | 72 | return CGM.CreateRuntimeFunction(FTy, "objc_enumerationMutation"); |
348 | 72 | } |
349 | | |
350 | 2 | llvm::FunctionCallee getLookUpClassFn() { |
351 | 2 | CodeGen::CodeGenTypes &Types = CGM.getTypes(); |
352 | 2 | ASTContext &Ctx = CGM.getContext(); |
353 | | // Class objc_lookUpClass (const char *) |
354 | 2 | SmallVector<CanQualType,1> Params; |
355 | 2 | Params.push_back( |
356 | 2 | Ctx.getCanonicalType(Ctx.getPointerType(Ctx.CharTy.withConst()))); |
357 | 2 | llvm::FunctionType *FTy = |
358 | 2 | Types.GetFunctionType(Types.arrangeBuiltinFunctionDeclaration( |
359 | 2 | Ctx.getCanonicalType(Ctx.getObjCClassType()), |
360 | 2 | Params)); |
361 | 2 | return CGM.CreateRuntimeFunction(FTy, "objc_lookUpClass"); |
362 | 2 | } |
363 | | |
364 | | /// GcReadWeakFn -- LLVM objc_read_weak (id *src) function. |
365 | 39 | llvm::FunctionCallee getGcReadWeakFn() { |
366 | | // id objc_read_weak (id *) |
367 | 39 | llvm::Type *args[] = { ObjectPtrTy->getPointerTo() }; |
368 | 39 | llvm::FunctionType *FTy = |
369 | 39 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
370 | 39 | return CGM.CreateRuntimeFunction(FTy, "objc_read_weak"); |
371 | 39 | } |
372 | | |
373 | | /// GcAssignWeakFn -- LLVM objc_assign_weak function. |
374 | 28 | llvm::FunctionCallee getGcAssignWeakFn() { |
375 | | // id objc_assign_weak (id, id *) |
376 | 28 | llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() }; |
377 | 28 | llvm::FunctionType *FTy = |
378 | 28 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
379 | 28 | return CGM.CreateRuntimeFunction(FTy, "objc_assign_weak"); |
380 | 28 | } |
381 | | |
382 | | /// GcAssignGlobalFn -- LLVM objc_assign_global function. |
383 | 84 | llvm::FunctionCallee getGcAssignGlobalFn() { |
384 | | // id objc_assign_global(id, id *) |
385 | 84 | llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() }; |
386 | 84 | llvm::FunctionType *FTy = |
387 | 84 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
388 | 84 | return CGM.CreateRuntimeFunction(FTy, "objc_assign_global"); |
389 | 84 | } |
390 | | |
391 | | /// GcAssignThreadLocalFn -- LLVM objc_assign_threadlocal function. |
392 | 0 | llvm::FunctionCallee getGcAssignThreadLocalFn() { |
393 | | // id objc_assign_threadlocal(id src, id * dest) |
394 | 0 | llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() }; |
395 | 0 | llvm::FunctionType *FTy = |
396 | 0 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
397 | 0 | return CGM.CreateRuntimeFunction(FTy, "objc_assign_threadlocal"); |
398 | 0 | } |
399 | | |
400 | | /// GcAssignIvarFn -- LLVM objc_assign_ivar function. |
401 | 54 | llvm::FunctionCallee getGcAssignIvarFn() { |
402 | | // id objc_assign_ivar(id, id *, ptrdiff_t) |
403 | 54 | llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo(), |
404 | 54 | CGM.PtrDiffTy }; |
405 | 54 | llvm::FunctionType *FTy = |
406 | 54 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
407 | 54 | return CGM.CreateRuntimeFunction(FTy, "objc_assign_ivar"); |
408 | 54 | } |
409 | | |
410 | | /// GcMemmoveCollectableFn -- LLVM objc_memmove_collectable function. |
411 | 31 | llvm::FunctionCallee GcMemmoveCollectableFn() { |
412 | | // void *objc_memmove_collectable(void *dst, const void *src, size_t size) |
413 | 31 | llvm::Type *args[] = { Int8PtrTy, Int8PtrTy, LongTy }; |
414 | 31 | llvm::FunctionType *FTy = llvm::FunctionType::get(Int8PtrTy, args, false); |
415 | 31 | return CGM.CreateRuntimeFunction(FTy, "objc_memmove_collectable"); |
416 | 31 | } |
417 | | |
418 | | /// GcAssignStrongCastFn -- LLVM objc_assign_strongCast function. |
419 | 81 | llvm::FunctionCallee getGcAssignStrongCastFn() { |
420 | | // id objc_assign_strongCast(id, id *) |
421 | 81 | llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() }; |
422 | 81 | llvm::FunctionType *FTy = |
423 | 81 | llvm::FunctionType::get(ObjectPtrTy, args, false); |
424 | 81 | return CGM.CreateRuntimeFunction(FTy, "objc_assign_strongCast"); |
425 | 81 | } |
426 | | |
427 | | /// ExceptionThrowFn - LLVM objc_exception_throw function. |
428 | 52 | llvm::FunctionCallee getExceptionThrowFn() { |
429 | | // void objc_exception_throw(id) |
430 | 52 | llvm::Type *args[] = { ObjectPtrTy }; |
431 | 52 | llvm::FunctionType *FTy = |
432 | 52 | llvm::FunctionType::get(CGM.VoidTy, args, false); |
433 | 52 | return CGM.CreateRuntimeFunction(FTy, "objc_exception_throw"); |
434 | 52 | } |
435 | | |
436 | | /// ExceptionRethrowFn - LLVM objc_exception_rethrow function. |
437 | 149 | llvm::FunctionCallee getExceptionRethrowFn() { |
438 | | // void objc_exception_rethrow(void) |
439 | 149 | llvm::FunctionType *FTy = llvm::FunctionType::get(CGM.VoidTy, false); |
440 | 149 | return CGM.CreateRuntimeFunction(FTy, "objc_exception_rethrow"); |
441 | 149 | } |
442 | | |
443 | | /// SyncEnterFn - LLVM object_sync_enter function. |
444 | 12 | llvm::FunctionCallee getSyncEnterFn() { |
445 | | // int objc_sync_enter (id) |
446 | 12 | llvm::Type *args[] = { ObjectPtrTy }; |
447 | 12 | llvm::FunctionType *FTy = |
448 | 12 | llvm::FunctionType::get(CGM.IntTy, args, false); |
449 | 12 | return CGM.CreateRuntimeFunction(FTy, "objc_sync_enter"); |
450 | 12 | } |
451 | | |
452 | | /// SyncExitFn - LLVM object_sync_exit function. |
453 | 13 | llvm::FunctionCallee getSyncExitFn() { |
454 | | // int objc_sync_exit (id) |
455 | 13 | llvm::Type *args[] = { ObjectPtrTy }; |
456 | 13 | llvm::FunctionType *FTy = |
457 | 13 | llvm::FunctionType::get(CGM.IntTy, args, false); |
458 | 13 | return CGM.CreateRuntimeFunction(FTy, "objc_sync_exit"); |
459 | 13 | } |
460 | | |
461 | 209 | llvm::FunctionCallee getSendFn(bool IsSuper) const { |
462 | 188 | return IsSuper ? getMessageSendSuperFn()21 : getMessageSendFn(); |
463 | 209 | } |
464 | | |
465 | 11.9k | llvm::FunctionCallee getSendFn2(bool IsSuper) const { |
466 | 11.4k | return IsSuper ? getMessageSendSuperFn2()473 : getMessageSendFn(); |
467 | 11.9k | } |
468 | | |
469 | 4 | llvm::FunctionCallee getSendStretFn(bool IsSuper) const { |
470 | 2 | return IsSuper ? getMessageSendSuperStretFn() : getMessageSendStretFn(); |
471 | 4 | } |
472 | | |
473 | 15 | llvm::FunctionCallee getSendStretFn2(bool IsSuper) const { |
474 | 13 | return IsSuper ? getMessageSendSuperStretFn2()2 : getMessageSendStretFn(); |
475 | 15 | } |
476 | | |
477 | 4 | llvm::FunctionCallee getSendFpretFn(bool IsSuper) const { |
478 | 4 | return IsSuper ? getMessageSendSuperFpretFn()0 : getMessageSendFpretFn(); |
479 | 4 | } |
480 | | |
481 | 2 | llvm::FunctionCallee getSendFpretFn2(bool IsSuper) const { |
482 | 2 | return IsSuper ? getMessageSendSuperFpretFn2()0 : getMessageSendFpretFn(); |
483 | 2 | } |
484 | | |
485 | 1 | llvm::FunctionCallee getSendFp2retFn(bool IsSuper) const { |
486 | 1 | return IsSuper ? getMessageSendSuperFn()0 : getMessageSendFp2retFn(); |
487 | 1 | } |
488 | | |
489 | 0 | llvm::FunctionCallee getSendFp2RetFn2(bool IsSuper) const { |
490 | 0 | return IsSuper ? getMessageSendSuperFn2() : getMessageSendFp2retFn(); |
491 | 0 | } |
492 | | |
493 | | ObjCCommonTypesHelper(CodeGen::CodeGenModule &cgm); |
494 | | }; |
495 | | |
496 | | /// ObjCTypesHelper - Helper class that encapsulates lazy |
497 | | /// construction of varies types used during ObjC generation. |
498 | | class ObjCTypesHelper : public ObjCCommonTypesHelper { |
499 | | public: |
500 | | /// SymtabTy - LLVM type for struct objc_symtab. |
501 | | llvm::StructType *SymtabTy; |
502 | | /// SymtabPtrTy - LLVM type for struct objc_symtab *. |
503 | | llvm::PointerType *SymtabPtrTy; |
504 | | /// ModuleTy - LLVM type for struct objc_module. |
505 | | llvm::StructType *ModuleTy; |
506 | | |
507 | | /// ProtocolTy - LLVM type for struct objc_protocol. |
508 | | llvm::StructType *ProtocolTy; |
509 | | /// ProtocolPtrTy - LLVM type for struct objc_protocol *. |
510 | | llvm::PointerType *ProtocolPtrTy; |
511 | | /// ProtocolExtensionTy - LLVM type for struct |
512 | | /// objc_protocol_extension. |
513 | | llvm::StructType *ProtocolExtensionTy; |
514 | | /// ProtocolExtensionTy - LLVM type for struct |
515 | | /// objc_protocol_extension *. |
516 | | llvm::PointerType *ProtocolExtensionPtrTy; |
517 | | /// MethodDescriptionTy - LLVM type for struct |
518 | | /// objc_method_description. |
519 | | llvm::StructType *MethodDescriptionTy; |
520 | | /// MethodDescriptionListTy - LLVM type for struct |
521 | | /// objc_method_description_list. |
522 | | llvm::StructType *MethodDescriptionListTy; |
523 | | /// MethodDescriptionListPtrTy - LLVM type for struct |
524 | | /// objc_method_description_list *. |
525 | | llvm::PointerType *MethodDescriptionListPtrTy; |
526 | | /// ProtocolListTy - LLVM type for struct objc_property_list. |
527 | | llvm::StructType *ProtocolListTy; |
528 | | /// ProtocolListPtrTy - LLVM type for struct objc_property_list*. |
529 | | llvm::PointerType *ProtocolListPtrTy; |
530 | | /// CategoryTy - LLVM type for struct objc_category. |
531 | | llvm::StructType *CategoryTy; |
532 | | /// ClassTy - LLVM type for struct objc_class. |
533 | | llvm::StructType *ClassTy; |
534 | | /// ClassPtrTy - LLVM type for struct objc_class *. |
535 | | llvm::PointerType *ClassPtrTy; |
536 | | /// ClassExtensionTy - LLVM type for struct objc_class_ext. |
537 | | llvm::StructType *ClassExtensionTy; |
538 | | /// ClassExtensionPtrTy - LLVM type for struct objc_class_ext *. |
539 | | llvm::PointerType *ClassExtensionPtrTy; |
540 | | // IvarTy - LLVM type for struct objc_ivar. |
541 | | llvm::StructType *IvarTy; |
542 | | /// IvarListTy - LLVM type for struct objc_ivar_list. |
543 | | llvm::StructType *IvarListTy; |
544 | | /// IvarListPtrTy - LLVM type for struct objc_ivar_list *. |
545 | | llvm::PointerType *IvarListPtrTy; |
546 | | /// MethodListTy - LLVM type for struct objc_method_list. |
547 | | llvm::StructType *MethodListTy; |
548 | | /// MethodListPtrTy - LLVM type for struct objc_method_list *. |
549 | | llvm::PointerType *MethodListPtrTy; |
550 | | |
551 | | /// ExceptionDataTy - LLVM type for struct _objc_exception_data. |
552 | | llvm::StructType *ExceptionDataTy; |
553 | | |
554 | | /// ExceptionTryEnterFn - LLVM objc_exception_try_enter function. |
555 | 42 | llvm::FunctionCallee getExceptionTryEnterFn() { |
556 | 42 | llvm::Type *params[] = { ExceptionDataTy->getPointerTo() }; |
557 | 42 | return CGM.CreateRuntimeFunction( |
558 | 42 | llvm::FunctionType::get(CGM.VoidTy, params, false), |
559 | 42 | "objc_exception_try_enter"); |
560 | 42 | } |
561 | | |
562 | | /// ExceptionTryExitFn - LLVM objc_exception_try_exit function. |
563 | 64 | llvm::FunctionCallee getExceptionTryExitFn() { |
564 | 64 | llvm::Type *params[] = { ExceptionDataTy->getPointerTo() }; |
565 | 64 | return CGM.CreateRuntimeFunction( |
566 | 64 | llvm::FunctionType::get(CGM.VoidTy, params, false), |
567 | 64 | "objc_exception_try_exit"); |
568 | 64 | } |
569 | | |
570 | | /// ExceptionExtractFn - LLVM objc_exception_extract function. |
571 | 48 | llvm::FunctionCallee getExceptionExtractFn() { |
572 | 48 | llvm::Type *params[] = { ExceptionDataTy->getPointerTo() }; |
573 | 48 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
574 | 48 | params, false), |
575 | 48 | "objc_exception_extract"); |
576 | 48 | } |
577 | | |
578 | | /// ExceptionMatchFn - LLVM objc_exception_match function. |
579 | 9 | llvm::FunctionCallee getExceptionMatchFn() { |
580 | 9 | llvm::Type *params[] = { ClassPtrTy, ObjectPtrTy }; |
581 | 9 | return CGM.CreateRuntimeFunction( |
582 | 9 | llvm::FunctionType::get(CGM.Int32Ty, params, false), |
583 | 9 | "objc_exception_match"); |
584 | 9 | } |
585 | | |
586 | | /// SetJmpFn - LLVM _setjmp function. |
587 | 42 | llvm::FunctionCallee getSetJmpFn() { |
588 | | // This is specifically the prototype for x86. |
589 | 42 | llvm::Type *params[] = { CGM.Int32Ty->getPointerTo() }; |
590 | 42 | return CGM.CreateRuntimeFunction( |
591 | 42 | llvm::FunctionType::get(CGM.Int32Ty, params, false), "_setjmp", |
592 | 42 | llvm::AttributeList::get(CGM.getLLVMContext(), |
593 | 42 | llvm::AttributeList::FunctionIndex, |
594 | 42 | llvm::Attribute::NonLazyBind)); |
595 | 42 | } |
596 | | |
597 | | public: |
598 | | ObjCTypesHelper(CodeGen::CodeGenModule &cgm); |
599 | | }; |
600 | | |
601 | | /// ObjCNonFragileABITypesHelper - will have all types needed by objective-c's |
602 | | /// modern abi |
603 | | class ObjCNonFragileABITypesHelper : public ObjCCommonTypesHelper { |
604 | | public: |
605 | | // MethodListnfABITy - LLVM for struct _method_list_t |
606 | | llvm::StructType *MethodListnfABITy; |
607 | | |
608 | | // MethodListnfABIPtrTy - LLVM for struct _method_list_t* |
609 | | llvm::PointerType *MethodListnfABIPtrTy; |
610 | | |
611 | | // ProtocolnfABITy = LLVM for struct _protocol_t |
612 | | llvm::StructType *ProtocolnfABITy; |
613 | | |
614 | | // ProtocolnfABIPtrTy = LLVM for struct _protocol_t* |
615 | | llvm::PointerType *ProtocolnfABIPtrTy; |
616 | | |
617 | | // ProtocolListnfABITy - LLVM for struct _objc_protocol_list |
618 | | llvm::StructType *ProtocolListnfABITy; |
619 | | |
620 | | // ProtocolListnfABIPtrTy - LLVM for struct _objc_protocol_list* |
621 | | llvm::PointerType *ProtocolListnfABIPtrTy; |
622 | | |
623 | | // ClassnfABITy - LLVM for struct _class_t |
624 | | llvm::StructType *ClassnfABITy; |
625 | | |
626 | | // ClassnfABIPtrTy - LLVM for struct _class_t* |
627 | | llvm::PointerType *ClassnfABIPtrTy; |
628 | | |
629 | | // IvarnfABITy - LLVM for struct _ivar_t |
630 | | llvm::StructType *IvarnfABITy; |
631 | | |
632 | | // IvarListnfABITy - LLVM for struct _ivar_list_t |
633 | | llvm::StructType *IvarListnfABITy; |
634 | | |
635 | | // IvarListnfABIPtrTy = LLVM for struct _ivar_list_t* |
636 | | llvm::PointerType *IvarListnfABIPtrTy; |
637 | | |
638 | | // ClassRonfABITy - LLVM for struct _class_ro_t |
639 | | llvm::StructType *ClassRonfABITy; |
640 | | |
641 | | // ImpnfABITy - LLVM for id (*)(id, SEL, ...) |
642 | | llvm::PointerType *ImpnfABITy; |
643 | | |
644 | | // CategorynfABITy - LLVM for struct _category_t |
645 | | llvm::StructType *CategorynfABITy; |
646 | | |
647 | | // New types for nonfragile abi messaging. |
648 | | |
649 | | // MessageRefTy - LLVM for: |
650 | | // struct _message_ref_t { |
651 | | // IMP messenger; |
652 | | // SEL name; |
653 | | // }; |
654 | | llvm::StructType *MessageRefTy; |
655 | | // MessageRefCTy - clang type for struct _message_ref_t |
656 | | QualType MessageRefCTy; |
657 | | |
658 | | // MessageRefPtrTy - LLVM for struct _message_ref_t* |
659 | | llvm::Type *MessageRefPtrTy; |
660 | | // MessageRefCPtrTy - clang type for struct _message_ref_t* |
661 | | QualType MessageRefCPtrTy; |
662 | | |
663 | | // SuperMessageRefTy - LLVM for: |
664 | | // struct _super_message_ref_t { |
665 | | // SUPER_IMP messenger; |
666 | | // SEL name; |
667 | | // }; |
668 | | llvm::StructType *SuperMessageRefTy; |
669 | | |
670 | | // SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t* |
671 | | llvm::PointerType *SuperMessageRefPtrTy; |
672 | | |
673 | 13 | llvm::FunctionCallee getMessageSendFixupFn() { |
674 | | // id objc_msgSend_fixup(id, struct message_ref_t*, ...) |
675 | 13 | llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy }; |
676 | 13 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
677 | 13 | params, true), |
678 | 13 | "objc_msgSend_fixup"); |
679 | 13 | } |
680 | | |
681 | 0 | llvm::FunctionCallee getMessageSendFpretFixupFn() { |
682 | | // id objc_msgSend_fpret_fixup(id, struct message_ref_t*, ...) |
683 | 0 | llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy }; |
684 | 0 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
685 | 0 | params, true), |
686 | 0 | "objc_msgSend_fpret_fixup"); |
687 | 0 | } |
688 | | |
689 | 0 | llvm::FunctionCallee getMessageSendStretFixupFn() { |
690 | | // id objc_msgSend_stret_fixup(id, struct message_ref_t*, ...) |
691 | 0 | llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy }; |
692 | 0 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
693 | 0 | params, true), |
694 | 0 | "objc_msgSend_stret_fixup"); |
695 | 0 | } |
696 | | |
697 | 3 | llvm::FunctionCallee getMessageSendSuper2FixupFn() { |
698 | | // id objc_msgSendSuper2_fixup (struct objc_super *, |
699 | | // struct _super_message_ref_t*, ...) |
700 | 3 | llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy }; |
701 | 3 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
702 | 3 | params, true), |
703 | 3 | "objc_msgSendSuper2_fixup"); |
704 | 3 | } |
705 | | |
706 | 0 | llvm::FunctionCallee getMessageSendSuper2StretFixupFn() { |
707 | | // id objc_msgSendSuper2_stret_fixup(struct objc_super *, |
708 | | // struct _super_message_ref_t*, ...) |
709 | 0 | llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy }; |
710 | 0 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy, |
711 | 0 | params, true), |
712 | 0 | "objc_msgSendSuper2_stret_fixup"); |
713 | 0 | } |
714 | | |
715 | 136 | llvm::FunctionCallee getObjCEndCatchFn() { |
716 | 136 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy, false), |
717 | 136 | "objc_end_catch"); |
718 | 136 | } |
719 | | |
720 | 136 | llvm::FunctionCallee getObjCBeginCatchFn() { |
721 | 136 | llvm::Type *params[] = { Int8PtrTy }; |
722 | 136 | return CGM.CreateRuntimeFunction(llvm::FunctionType::get(Int8PtrTy, |
723 | 136 | params, false), |
724 | 136 | "objc_begin_catch"); |
725 | 136 | } |
726 | | |
727 | | /// Class objc_loadClassref (void *) |
728 | | /// |
729 | | /// Loads from a classref. For Objective-C stub classes, this invokes the |
730 | | /// initialization callback stored inside the stub. For all other classes |
731 | | /// this simply dereferences the pointer. |
732 | 2 | llvm::FunctionCallee getLoadClassrefFn() const { |
733 | | // Add the non-lazy-bind attribute, since objc_loadClassref is likely to |
734 | | // be called a lot. |
735 | | // |
736 | | // Also it is safe to make it readnone, since we never load or store the |
737 | | // classref except by calling this function. |
738 | 2 | llvm::Type *params[] = { Int8PtrPtrTy }; |
739 | 2 | llvm::FunctionCallee F = CGM.CreateRuntimeFunction( |
740 | 2 | llvm::FunctionType::get(ClassnfABIPtrTy, params, false), |
741 | 2 | "objc_loadClassref", |
742 | 2 | llvm::AttributeList::get(CGM.getLLVMContext(), |
743 | 2 | llvm::AttributeList::FunctionIndex, |
744 | 2 | {llvm::Attribute::NonLazyBind, |
745 | 2 | llvm::Attribute::ReadNone, |
746 | 2 | llvm::Attribute::NoUnwind})); |
747 | 2 | if (!CGM.getTriple().isOSBinFormatCOFF()) |
748 | 2 | cast<llvm::Function>(F.getCallee())->setLinkage( |
749 | 2 | llvm::Function::ExternalWeakLinkage); |
750 | | |
751 | 2 | return F; |
752 | 2 | } |
753 | | |
754 | | llvm::StructType *EHTypeTy; |
755 | | llvm::Type *EHTypePtrTy; |
756 | | |
757 | | ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm); |
758 | | }; |
759 | | |
760 | | enum class ObjCLabelType { |
761 | | ClassName, |
762 | | MethodVarName, |
763 | | MethodVarType, |
764 | | PropertyName, |
765 | | }; |
766 | | |
767 | | class CGObjCCommonMac : public CodeGen::CGObjCRuntime { |
768 | | public: |
769 | | class SKIP_SCAN { |
770 | | public: |
771 | | unsigned skip; |
772 | | unsigned scan; |
773 | | SKIP_SCAN(unsigned _skip = 0, unsigned _scan = 0) |
774 | 0 | : skip(_skip), scan(_scan) {} |
775 | | }; |
776 | | |
777 | | /// opcode for captured block variables layout 'instructions'. |
778 | | /// In the following descriptions, 'I' is the value of the immediate field. |
779 | | /// (field following the opcode). |
780 | | /// |
781 | | enum BLOCK_LAYOUT_OPCODE { |
782 | | /// An operator which affects how the following layout should be |
783 | | /// interpreted. |
784 | | /// I == 0: Halt interpretation and treat everything else as |
785 | | /// a non-pointer. Note that this instruction is equal |
786 | | /// to '\0'. |
787 | | /// I != 0: Currently unused. |
788 | | BLOCK_LAYOUT_OPERATOR = 0, |
789 | | |
790 | | /// The next I+1 bytes do not contain a value of object pointer type. |
791 | | /// Note that this can leave the stream unaligned, meaning that |
792 | | /// subsequent word-size instructions do not begin at a multiple of |
793 | | /// the pointer size. |
794 | | BLOCK_LAYOUT_NON_OBJECT_BYTES = 1, |
795 | | |
796 | | /// The next I+1 words do not contain a value of object pointer type. |
797 | | /// This is simply an optimized version of BLOCK_LAYOUT_BYTES for |
798 | | /// when the required skip quantity is a multiple of the pointer size. |
799 | | BLOCK_LAYOUT_NON_OBJECT_WORDS = 2, |
800 | | |
801 | | /// The next I+1 words are __strong pointers to Objective-C |
802 | | /// objects or blocks. |
803 | | BLOCK_LAYOUT_STRONG = 3, |
804 | | |
805 | | /// The next I+1 words are pointers to __block variables. |
806 | | BLOCK_LAYOUT_BYREF = 4, |
807 | | |
808 | | /// The next I+1 words are __weak pointers to Objective-C |
809 | | /// objects or blocks. |
810 | | BLOCK_LAYOUT_WEAK = 5, |
811 | | |
812 | | /// The next I+1 words are __unsafe_unretained pointers to |
813 | | /// Objective-C objects or blocks. |
814 | | BLOCK_LAYOUT_UNRETAINED = 6 |
815 | | |
816 | | /// The next I+1 words are block or object pointers with some |
817 | | /// as-yet-unspecified ownership semantics. If we add more |
818 | | /// flavors of ownership semantics, values will be taken from |
819 | | /// this range. |
820 | | /// |
821 | | /// This is included so that older tools can at least continue |
822 | | /// processing the layout past such things. |
823 | | //BLOCK_LAYOUT_OWNERSHIP_UNKNOWN = 7..10, |
824 | | |
825 | | /// All other opcodes are reserved. Halt interpretation and |
826 | | /// treat everything else as opaque. |
827 | | }; |
828 | | |
829 | | class RUN_SKIP { |
830 | | public: |
831 | | enum BLOCK_LAYOUT_OPCODE opcode; |
832 | | CharUnits block_var_bytepos; |
833 | | CharUnits block_var_size; |
834 | | RUN_SKIP(enum BLOCK_LAYOUT_OPCODE Opcode = BLOCK_LAYOUT_OPERATOR, |
835 | | CharUnits BytePos = CharUnits::Zero(), |
836 | | CharUnits Size = CharUnits::Zero()) |
837 | 1.19k | : opcode(Opcode), block_var_bytepos(BytePos), block_var_size(Size) {} |
838 | | |
839 | | // Allow sorting based on byte pos. |
840 | 937 | bool operator<(const RUN_SKIP &b) const { |
841 | 937 | return block_var_bytepos < b.block_var_bytepos; |
842 | 937 | } |
843 | | }; |
844 | | |
845 | | protected: |
846 | | llvm::LLVMContext &VMContext; |
847 | | // FIXME! May not be needing this after all. |
848 | | unsigned ObjCABI; |
849 | | |
850 | | // arc/mrr layout of captured block literal variables. |
851 | | SmallVector<RUN_SKIP, 16> RunSkipBlockVars; |
852 | | |
853 | | /// LazySymbols - Symbols to generate a lazy reference for. See |
854 | | /// DefinedSymbols and FinishModule(). |
855 | | llvm::SetVector<IdentifierInfo*> LazySymbols; |
856 | | |
857 | | /// DefinedSymbols - External symbols which are defined by this |
858 | | /// module. The symbols in this list and LazySymbols are used to add |
859 | | /// special linker symbols which ensure that Objective-C modules are |
860 | | /// linked properly. |
861 | | llvm::SetVector<IdentifierInfo*> DefinedSymbols; |
862 | | |
863 | | /// ClassNames - uniqued class names. |
864 | | llvm::StringMap<llvm::GlobalVariable*> ClassNames; |
865 | | |
866 | | /// MethodVarNames - uniqued method variable names. |
867 | | llvm::DenseMap<Selector, llvm::GlobalVariable*> MethodVarNames; |
868 | | |
869 | | /// DefinedCategoryNames - list of category names in form Class_Category. |
870 | | llvm::SmallSetVector<llvm::CachedHashString, 16> DefinedCategoryNames; |
871 | | |
872 | | /// MethodVarTypes - uniqued method type signatures. We have to use |
873 | | /// a StringMap here because have no other unique reference. |
874 | | llvm::StringMap<llvm::GlobalVariable*> MethodVarTypes; |
875 | | |
876 | | /// MethodDefinitions - map of methods which have been defined in |
877 | | /// this translation unit. |
878 | | llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*> MethodDefinitions; |
879 | | |
880 | | /// DirectMethodDefinitions - map of direct methods which have been defined in |
881 | | /// this translation unit. |
882 | | llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*> DirectMethodDefinitions; |
883 | | |
884 | | /// PropertyNames - uniqued method variable names. |
885 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> PropertyNames; |
886 | | |
887 | | /// ClassReferences - uniqued class references. |
888 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassReferences; |
889 | | |
890 | | /// SelectorReferences - uniqued selector references. |
891 | | llvm::DenseMap<Selector, llvm::GlobalVariable*> SelectorReferences; |
892 | | |
893 | | /// Protocols - Protocols for which an objc_protocol structure has |
894 | | /// been emitted. Forward declarations are handled by creating an |
895 | | /// empty structure whose initializer is filled in when/if defined. |
896 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> Protocols; |
897 | | |
898 | | /// DefinedProtocols - Protocols which have actually been |
899 | | /// defined. We should not need this, see FIXME in GenerateProtocol. |
900 | | llvm::DenseSet<IdentifierInfo*> DefinedProtocols; |
901 | | |
902 | | /// DefinedClasses - List of defined classes. |
903 | | SmallVector<llvm::GlobalValue*, 16> DefinedClasses; |
904 | | |
905 | | /// ImplementedClasses - List of @implemented classes. |
906 | | SmallVector<const ObjCInterfaceDecl*, 16> ImplementedClasses; |
907 | | |
908 | | /// DefinedNonLazyClasses - List of defined "non-lazy" classes. |
909 | | SmallVector<llvm::GlobalValue*, 16> DefinedNonLazyClasses; |
910 | | |
911 | | /// DefinedCategories - List of defined categories. |
912 | | SmallVector<llvm::GlobalValue*, 16> DefinedCategories; |
913 | | |
914 | | /// DefinedStubCategories - List of defined categories on class stubs. |
915 | | SmallVector<llvm::GlobalValue*, 16> DefinedStubCategories; |
916 | | |
917 | | /// DefinedNonLazyCategories - List of defined "non-lazy" categories. |
918 | | SmallVector<llvm::GlobalValue*, 16> DefinedNonLazyCategories; |
919 | | |
920 | | /// Cached reference to the class for constant strings. This value has type |
921 | | /// int * but is actually an Obj-C class pointer. |
922 | | llvm::WeakTrackingVH ConstantStringClassRef; |
923 | | |
924 | | /// The LLVM type corresponding to NSConstantString. |
925 | | llvm::StructType *NSConstantStringType = nullptr; |
926 | | |
927 | | llvm::StringMap<llvm::GlobalVariable *> NSConstantStringMap; |
928 | | |
929 | | /// GetMethodVarName - Return a unique constant for the given |
930 | | /// selector's name. The return value has type char *. |
931 | | llvm::Constant *GetMethodVarName(Selector Sel); |
932 | | llvm::Constant *GetMethodVarName(IdentifierInfo *Ident); |
933 | | |
934 | | /// GetMethodVarType - Return a unique constant for the given |
935 | | /// method's type encoding string. The return value has type char *. |
936 | | |
937 | | // FIXME: This is a horrible name. |
938 | | llvm::Constant *GetMethodVarType(const ObjCMethodDecl *D, |
939 | | bool Extended = false); |
940 | | llvm::Constant *GetMethodVarType(const FieldDecl *D); |
941 | | |
942 | | /// GetPropertyName - Return a unique constant for the given |
943 | | /// name. The return value has type char *. |
944 | | llvm::Constant *GetPropertyName(IdentifierInfo *Ident); |
945 | | |
946 | | // FIXME: This can be dropped once string functions are unified. |
947 | | llvm::Constant *GetPropertyTypeString(const ObjCPropertyDecl *PD, |
948 | | const Decl *Container); |
949 | | |
950 | | /// GetClassName - Return a unique constant for the given selector's |
951 | | /// runtime name (which may change via use of objc_runtime_name attribute on |
952 | | /// class or protocol definition. The return value has type char *. |
953 | | llvm::Constant *GetClassName(StringRef RuntimeName); |
954 | | |
955 | | llvm::Function *GetMethodDefinition(const ObjCMethodDecl *MD); |
956 | | |
957 | | /// BuildIvarLayout - Builds ivar layout bitmap for the class |
958 | | /// implementation for the __strong or __weak case. |
959 | | /// |
960 | | /// \param hasMRCWeakIvars - Whether we are compiling in MRC and there |
961 | | /// are any weak ivars defined directly in the class. Meaningless unless |
962 | | /// building a weak layout. Does not guarantee that the layout will |
963 | | /// actually have any entries, because the ivar might be under-aligned. |
964 | | llvm::Constant *BuildIvarLayout(const ObjCImplementationDecl *OI, |
965 | | CharUnits beginOffset, |
966 | | CharUnits endOffset, |
967 | | bool forStrongLayout, |
968 | | bool hasMRCWeakIvars); |
969 | | |
970 | | llvm::Constant *BuildStrongIvarLayout(const ObjCImplementationDecl *OI, |
971 | | CharUnits beginOffset, |
972 | 1.08k | CharUnits endOffset) { |
973 | 1.08k | return BuildIvarLayout(OI, beginOffset, endOffset, true, false); |
974 | 1.08k | } |
975 | | |
976 | | llvm::Constant *BuildWeakIvarLayout(const ObjCImplementationDecl *OI, |
977 | | CharUnits beginOffset, |
978 | | CharUnits endOffset, |
979 | 1.08k | bool hasMRCWeakIvars) { |
980 | 1.08k | return BuildIvarLayout(OI, beginOffset, endOffset, false, hasMRCWeakIvars); |
981 | 1.08k | } |
982 | | |
983 | | Qualifiers::ObjCLifetime getBlockCaptureLifetime(QualType QT, bool ByrefLayout); |
984 | | |
985 | | void UpdateRunSkipBlockVars(bool IsByref, |
986 | | Qualifiers::ObjCLifetime LifeTime, |
987 | | CharUnits FieldOffset, |
988 | | CharUnits FieldSize); |
989 | | |
990 | | void BuildRCBlockVarRecordLayout(const RecordType *RT, |
991 | | CharUnits BytePos, bool &HasUnion, |
992 | | bool ByrefLayout=false); |
993 | | |
994 | | void BuildRCRecordLayout(const llvm::StructLayout *RecLayout, |
995 | | const RecordDecl *RD, |
996 | | ArrayRef<const FieldDecl*> RecFields, |
997 | | CharUnits BytePos, bool &HasUnion, |
998 | | bool ByrefLayout); |
999 | | |
1000 | | uint64_t InlineLayoutInstruction(SmallVectorImpl<unsigned char> &Layout); |
1001 | | |
1002 | | llvm::Constant *getBitmapBlockLayout(bool ComputeByrefLayout); |
1003 | | |
1004 | | /// GetIvarLayoutName - Returns a unique constant for the given |
1005 | | /// ivar layout bitmap. |
1006 | | llvm::Constant *GetIvarLayoutName(IdentifierInfo *Ident, |
1007 | | const ObjCCommonTypesHelper &ObjCTypes); |
1008 | | |
1009 | | /// EmitPropertyList - Emit the given property list. The return |
1010 | | /// value has type PropertyListPtrTy. |
1011 | | llvm::Constant *EmitPropertyList(Twine Name, |
1012 | | const Decl *Container, |
1013 | | const ObjCContainerDecl *OCD, |
1014 | | const ObjCCommonTypesHelper &ObjCTypes, |
1015 | | bool IsClassProperty); |
1016 | | |
1017 | | /// EmitProtocolMethodTypes - Generate the array of extended method type |
1018 | | /// strings. The return value has type Int8PtrPtrTy. |
1019 | | llvm::Constant *EmitProtocolMethodTypes(Twine Name, |
1020 | | ArrayRef<llvm::Constant*> MethodTypes, |
1021 | | const ObjCCommonTypesHelper &ObjCTypes); |
1022 | | |
1023 | | /// GetProtocolRef - Return a reference to the internal protocol |
1024 | | /// description, creating an empty one if it has not been |
1025 | | /// defined. The return value has type ProtocolPtrTy. |
1026 | | llvm::Constant *GetProtocolRef(const ObjCProtocolDecl *PD); |
1027 | | |
1028 | | /// Return a reference to the given Class using runtime calls rather than |
1029 | | /// by a symbol reference. |
1030 | | llvm::Value *EmitClassRefViaRuntime(CodeGenFunction &CGF, |
1031 | | const ObjCInterfaceDecl *ID, |
1032 | | ObjCCommonTypesHelper &ObjCTypes); |
1033 | | |
1034 | | std::string GetSectionName(StringRef Section, StringRef MachOAttributes); |
1035 | | |
1036 | | public: |
1037 | | /// CreateMetadataVar - Create a global variable with internal |
1038 | | /// linkage for use by the Objective-C runtime. |
1039 | | /// |
1040 | | /// This is a convenience wrapper which not only creates the |
1041 | | /// variable, but also sets the section and alignment and adds the |
1042 | | /// global to the "llvm.used" list. |
1043 | | /// |
1044 | | /// \param Name - The variable name. |
1045 | | /// \param Init - The variable initializer; this is also used to |
1046 | | /// define the type of the variable. |
1047 | | /// \param Section - The section the variable should go into, or empty. |
1048 | | /// \param Align - The alignment for the variable, or 0. |
1049 | | /// \param AddToUsed - Whether the variable should be added to |
1050 | | /// "llvm.used". |
1051 | | llvm::GlobalVariable *CreateMetadataVar(Twine Name, |
1052 | | ConstantStructBuilder &Init, |
1053 | | StringRef Section, CharUnits Align, |
1054 | | bool AddToUsed); |
1055 | | llvm::GlobalVariable *CreateMetadataVar(Twine Name, |
1056 | | llvm::Constant *Init, |
1057 | | StringRef Section, CharUnits Align, |
1058 | | bool AddToUsed); |
1059 | | |
1060 | | llvm::GlobalVariable *CreateCStringLiteral(StringRef Name, |
1061 | | ObjCLabelType LabelType, |
1062 | | bool ForceNonFragileABI = false, |
1063 | | bool NullTerminate = true); |
1064 | | |
1065 | | protected: |
1066 | | CodeGen::RValue EmitMessageSend(CodeGen::CodeGenFunction &CGF, |
1067 | | ReturnValueSlot Return, |
1068 | | QualType ResultType, |
1069 | | Selector Sel, |
1070 | | llvm::Value *Arg0, |
1071 | | QualType Arg0Ty, |
1072 | | bool IsSuper, |
1073 | | const CallArgList &CallArgs, |
1074 | | const ObjCMethodDecl *OMD, |
1075 | | const ObjCInterfaceDecl *ClassReceiver, |
1076 | | const ObjCCommonTypesHelper &ObjCTypes); |
1077 | | |
1078 | | /// EmitImageInfo - Emit the image info marker used to encode some module |
1079 | | /// level information. |
1080 | | void EmitImageInfo(); |
1081 | | |
1082 | | public: |
1083 | | CGObjCCommonMac(CodeGen::CodeGenModule &cgm) |
1084 | 13.4k | : CGObjCRuntime(cgm), VMContext(cgm.getLLVMContext()) {} |
1085 | | |
1086 | 13.3k | bool isNonFragileABI() const { |
1087 | 13.3k | return ObjCABI == 2; |
1088 | 13.3k | } |
1089 | | |
1090 | | ConstantAddress GenerateConstantString(const StringLiteral *SL) override; |
1091 | | ConstantAddress GenerateConstantNSString(const StringLiteral *SL); |
1092 | | |
1093 | | llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD, |
1094 | | const ObjCContainerDecl *CD=nullptr) override; |
1095 | | |
1096 | | llvm::Function *GenerateDirectMethod(const ObjCMethodDecl *OMD, |
1097 | | const ObjCContainerDecl *CD); |
1098 | | |
1099 | | void GenerateDirectMethodPrologue(CodeGenFunction &CGF, llvm::Function *Fn, |
1100 | | const ObjCMethodDecl *OMD, |
1101 | | const ObjCContainerDecl *CD) override; |
1102 | | |
1103 | | void GenerateProtocol(const ObjCProtocolDecl *PD) override; |
1104 | | |
1105 | | /// GetOrEmitProtocolRef - Get a forward reference to the protocol |
1106 | | /// object for the given declaration, emitting it if needed. These |
1107 | | /// forward references will be filled in with empty bodies if no |
1108 | | /// definition is seen. The return value has type ProtocolPtrTy. |
1109 | | virtual llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD)=0; |
1110 | | |
1111 | | virtual llvm::Constant *getNSConstantStringClassRef() = 0; |
1112 | | |
1113 | | llvm::Constant *BuildGCBlockLayout(CodeGen::CodeGenModule &CGM, |
1114 | | const CGBlockInfo &blockInfo) override; |
1115 | | llvm::Constant *BuildRCBlockLayout(CodeGen::CodeGenModule &CGM, |
1116 | | const CGBlockInfo &blockInfo) override; |
1117 | | std::string getRCBlockLayoutStr(CodeGen::CodeGenModule &CGM, |
1118 | | const CGBlockInfo &blockInfo) override; |
1119 | | |
1120 | | llvm::Constant *BuildByrefLayout(CodeGen::CodeGenModule &CGM, |
1121 | | QualType T) override; |
1122 | | |
1123 | | private: |
1124 | | void fillRunSkipBlockVars(CodeGenModule &CGM, const CGBlockInfo &blockInfo); |
1125 | | }; |
1126 | | |
1127 | | namespace { |
1128 | | |
1129 | | enum class MethodListType { |
1130 | | CategoryInstanceMethods, |
1131 | | CategoryClassMethods, |
1132 | | InstanceMethods, |
1133 | | ClassMethods, |
1134 | | ProtocolInstanceMethods, |
1135 | | ProtocolClassMethods, |
1136 | | OptionalProtocolInstanceMethods, |
1137 | | OptionalProtocolClassMethods, |
1138 | | }; |
1139 | | |
1140 | | /// A convenience class for splitting the methods of a protocol into |
1141 | | /// the four interesting groups. |
1142 | | class ProtocolMethodLists { |
1143 | | public: |
1144 | | enum Kind { |
1145 | | RequiredInstanceMethods, |
1146 | | RequiredClassMethods, |
1147 | | OptionalInstanceMethods, |
1148 | | OptionalClassMethods |
1149 | | }; |
1150 | | enum { |
1151 | | NumProtocolMethodLists = 4 |
1152 | | }; |
1153 | | |
1154 | 300 | static MethodListType getMethodListKind(Kind kind) { |
1155 | 300 | switch (kind) { |
1156 | 75 | case RequiredInstanceMethods: |
1157 | 75 | return MethodListType::ProtocolInstanceMethods; |
1158 | 75 | case RequiredClassMethods: |
1159 | 75 | return MethodListType::ProtocolClassMethods; |
1160 | 75 | case OptionalInstanceMethods: |
1161 | 75 | return MethodListType::OptionalProtocolInstanceMethods; |
1162 | 75 | case OptionalClassMethods: |
1163 | 75 | return MethodListType::OptionalProtocolClassMethods; |
1164 | 0 | } |
1165 | 0 | llvm_unreachable("bad kind"); |
1166 | 0 | } |
1167 | | |
1168 | | SmallVector<const ObjCMethodDecl *, 4> Methods[NumProtocolMethodLists]; |
1169 | | |
1170 | 75 | static ProtocolMethodLists get(const ObjCProtocolDecl *PD) { |
1171 | 75 | ProtocolMethodLists result; |
1172 | | |
1173 | 84 | for (auto MD : PD->methods()) { |
1174 | 84 | size_t index = (2 * size_t(MD->isOptional())) |
1175 | 84 | + (size_t(MD->isClassMethod())); |
1176 | 84 | result.Methods[index].push_back(MD); |
1177 | 84 | } |
1178 | | |
1179 | 75 | return result; |
1180 | 75 | } |
1181 | | |
1182 | | template <class Self> |
1183 | 75 | SmallVector<llvm::Constant*, 8> emitExtendedTypesArray(Self *self) const { |
1184 | | // In both ABIs, the method types list is parallel with the |
1185 | | // concatenation of the methods arrays in the following order: |
1186 | | // instance methods |
1187 | | // class methods |
1188 | | // optional instance methods |
1189 | | // optional class methods |
1190 | 75 | SmallVector<llvm::Constant*, 8> result; |
1191 | | |
1192 | | // Methods is already in the correct order for both ABIs. |
1193 | 300 | for (auto &list : Methods) { |
1194 | 84 | for (auto MD : list) { |
1195 | 84 | result.push_back(self->GetMethodVarType(MD, true)); |
1196 | 84 | } |
1197 | 300 | } |
1198 | | |
1199 | 75 | return result; |
1200 | 75 | } CGObjCMac.cpp:llvm::SmallVector<llvm::Constant*, 8u> (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::emitExtendedTypesArray<(anonymous namespace)::CGObjCMac>((anonymous namespace)::CGObjCMac*) const Line | Count | Source | 1183 | 15 | SmallVector<llvm::Constant*, 8> emitExtendedTypesArray(Self *self) const { | 1184 | | // In both ABIs, the method types list is parallel with the | 1185 | | // concatenation of the methods arrays in the following order: | 1186 | | // instance methods | 1187 | | // class methods | 1188 | | // optional instance methods | 1189 | | // optional class methods | 1190 | 15 | SmallVector<llvm::Constant*, 8> result; | 1191 | | | 1192 | | // Methods is already in the correct order for both ABIs. | 1193 | 60 | for (auto &list : Methods) { | 1194 | 7 | for (auto MD : list) { | 1195 | 7 | result.push_back(self->GetMethodVarType(MD, true)); | 1196 | 7 | } | 1197 | 60 | } | 1198 | | | 1199 | 15 | return result; | 1200 | 15 | } |
CGObjCMac.cpp:llvm::SmallVector<llvm::Constant*, 8u> (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::emitExtendedTypesArray<(anonymous namespace)::CGObjCNonFragileABIMac>((anonymous namespace)::CGObjCNonFragileABIMac*) const Line | Count | Source | 1183 | 60 | SmallVector<llvm::Constant*, 8> emitExtendedTypesArray(Self *self) const { | 1184 | | // In both ABIs, the method types list is parallel with the | 1185 | | // concatenation of the methods arrays in the following order: | 1186 | | // instance methods | 1187 | | // class methods | 1188 | | // optional instance methods | 1189 | | // optional class methods | 1190 | 60 | SmallVector<llvm::Constant*, 8> result; | 1191 | | | 1192 | | // Methods is already in the correct order for both ABIs. | 1193 | 240 | for (auto &list : Methods) { | 1194 | 77 | for (auto MD : list) { | 1195 | 77 | result.push_back(self->GetMethodVarType(MD, true)); | 1196 | 77 | } | 1197 | 240 | } | 1198 | | | 1199 | 60 | return result; | 1200 | 60 | } |
|
1201 | | |
1202 | | template <class Self> |
1203 | | llvm::Constant *emitMethodList(Self *self, const ObjCProtocolDecl *PD, |
1204 | 300 | Kind kind) const { |
1205 | 300 | return self->emitMethodList(PD->getObjCRuntimeNameAsString(), |
1206 | 300 | getMethodListKind(kind), Methods[kind]); |
1207 | 300 | } CGObjCMac.cpp:llvm::Constant* (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::emitMethodList<(anonymous namespace)::CGObjCMac>((anonymous namespace)::CGObjCMac*, clang::ObjCProtocolDecl const*, (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::Kind) const Line | Count | Source | 1204 | 60 | Kind kind) const { | 1205 | 60 | return self->emitMethodList(PD->getObjCRuntimeNameAsString(), | 1206 | 60 | getMethodListKind(kind), Methods[kind]); | 1207 | 60 | } |
CGObjCMac.cpp:llvm::Constant* (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::emitMethodList<(anonymous namespace)::CGObjCNonFragileABIMac>((anonymous namespace)::CGObjCNonFragileABIMac*, clang::ObjCProtocolDecl const*, (anonymous namespace)::(anonymous namespace)::ProtocolMethodLists::Kind) const Line | Count | Source | 1204 | 240 | Kind kind) const { | 1205 | 240 | return self->emitMethodList(PD->getObjCRuntimeNameAsString(), | 1206 | 240 | getMethodListKind(kind), Methods[kind]); | 1207 | 240 | } |
|
1208 | | }; |
1209 | | |
1210 | | } // end anonymous namespace |
1211 | | |
1212 | | class CGObjCMac : public CGObjCCommonMac { |
1213 | | private: |
1214 | | friend ProtocolMethodLists; |
1215 | | |
1216 | | ObjCTypesHelper ObjCTypes; |
1217 | | |
1218 | | /// EmitModuleInfo - Another marker encoding module level |
1219 | | /// information. |
1220 | | void EmitModuleInfo(); |
1221 | | |
1222 | | /// EmitModuleSymols - Emit module symbols, the list of defined |
1223 | | /// classes and categories. The result has type SymtabPtrTy. |
1224 | | llvm::Constant *EmitModuleSymbols(); |
1225 | | |
1226 | | /// FinishModule - Write out global data structures at the end of |
1227 | | /// processing a translation unit. |
1228 | | void FinishModule(); |
1229 | | |
1230 | | /// EmitClassExtension - Generate the class extension structure used |
1231 | | /// to store the weak ivar layout and properties. The return value |
1232 | | /// has type ClassExtensionPtrTy. |
1233 | | llvm::Constant *EmitClassExtension(const ObjCImplementationDecl *ID, |
1234 | | CharUnits instanceSize, |
1235 | | bool hasMRCWeakIvars, |
1236 | | bool isMetaclass); |
1237 | | |
1238 | | /// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy, |
1239 | | /// for the given class. |
1240 | | llvm::Value *EmitClassRef(CodeGenFunction &CGF, |
1241 | | const ObjCInterfaceDecl *ID); |
1242 | | |
1243 | | llvm::Value *EmitClassRefFromId(CodeGenFunction &CGF, |
1244 | | IdentifierInfo *II); |
1245 | | |
1246 | | llvm::Value *EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) override; |
1247 | | |
1248 | | /// EmitSuperClassRef - Emits reference to class's main metadata class. |
1249 | | llvm::Value *EmitSuperClassRef(const ObjCInterfaceDecl *ID); |
1250 | | |
1251 | | /// EmitIvarList - Emit the ivar list for the given |
1252 | | /// implementation. If ForClass is true the list of class ivars |
1253 | | /// (i.e. metaclass ivars) is emitted, otherwise the list of |
1254 | | /// interface ivars will be emitted. The return value has type |
1255 | | /// IvarListPtrTy. |
1256 | | llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID, |
1257 | | bool ForClass); |
1258 | | |
1259 | | /// EmitMetaClass - Emit a forward reference to the class structure |
1260 | | /// for the metaclass of the given interface. The return value has |
1261 | | /// type ClassPtrTy. |
1262 | | llvm::Constant *EmitMetaClassRef(const ObjCInterfaceDecl *ID); |
1263 | | |
1264 | | /// EmitMetaClass - Emit a class structure for the metaclass of the |
1265 | | /// given implementation. The return value has type ClassPtrTy. |
1266 | | llvm::Constant *EmitMetaClass(const ObjCImplementationDecl *ID, |
1267 | | llvm::Constant *Protocols, |
1268 | | ArrayRef<const ObjCMethodDecl *> Methods); |
1269 | | |
1270 | | void emitMethodConstant(ConstantArrayBuilder &builder, |
1271 | | const ObjCMethodDecl *MD); |
1272 | | |
1273 | | void emitMethodDescriptionConstant(ConstantArrayBuilder &builder, |
1274 | | const ObjCMethodDecl *MD); |
1275 | | |
1276 | | /// EmitMethodList - Emit the method list for the given |
1277 | | /// implementation. The return value has type MethodListPtrTy. |
1278 | | llvm::Constant *emitMethodList(Twine Name, MethodListType MLT, |
1279 | | ArrayRef<const ObjCMethodDecl *> Methods); |
1280 | | |
1281 | | /// GetOrEmitProtocol - Get the protocol object for the given |
1282 | | /// declaration, emitting it if necessary. The return value has type |
1283 | | /// ProtocolPtrTy. |
1284 | | llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD) override; |
1285 | | |
1286 | | /// GetOrEmitProtocolRef - Get a forward reference to the protocol |
1287 | | /// object for the given declaration, emitting it if needed. These |
1288 | | /// forward references will be filled in with empty bodies if no |
1289 | | /// definition is seen. The return value has type ProtocolPtrTy. |
1290 | | llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) override; |
1291 | | |
1292 | | /// EmitProtocolExtension - Generate the protocol extension |
1293 | | /// structure used to store optional instance and class methods, and |
1294 | | /// protocol properties. The return value has type |
1295 | | /// ProtocolExtensionPtrTy. |
1296 | | llvm::Constant * |
1297 | | EmitProtocolExtension(const ObjCProtocolDecl *PD, |
1298 | | const ProtocolMethodLists &methodLists); |
1299 | | |
1300 | | /// EmitProtocolList - Generate the list of referenced |
1301 | | /// protocols. The return value has type ProtocolListPtrTy. |
1302 | | llvm::Constant *EmitProtocolList(Twine Name, |
1303 | | ObjCProtocolDecl::protocol_iterator begin, |
1304 | | ObjCProtocolDecl::protocol_iterator end); |
1305 | | |
1306 | | /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy, |
1307 | | /// for the given selector. |
1308 | | llvm::Value *EmitSelector(CodeGenFunction &CGF, Selector Sel); |
1309 | | Address EmitSelectorAddr(Selector Sel); |
1310 | | |
1311 | | public: |
1312 | | CGObjCMac(CodeGen::CodeGenModule &cgm); |
1313 | | |
1314 | | llvm::Constant *getNSConstantStringClassRef() override; |
1315 | | |
1316 | | llvm::Function *ModuleInitFunction() override; |
1317 | | |
1318 | | CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
1319 | | ReturnValueSlot Return, |
1320 | | QualType ResultType, |
1321 | | Selector Sel, llvm::Value *Receiver, |
1322 | | const CallArgList &CallArgs, |
1323 | | const ObjCInterfaceDecl *Class, |
1324 | | const ObjCMethodDecl *Method) override; |
1325 | | |
1326 | | CodeGen::RValue |
1327 | | GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
1328 | | ReturnValueSlot Return, QualType ResultType, |
1329 | | Selector Sel, const ObjCInterfaceDecl *Class, |
1330 | | bool isCategoryImpl, llvm::Value *Receiver, |
1331 | | bool IsClassMessage, const CallArgList &CallArgs, |
1332 | | const ObjCMethodDecl *Method) override; |
1333 | | |
1334 | | llvm::Value *GetClass(CodeGenFunction &CGF, |
1335 | | const ObjCInterfaceDecl *ID) override; |
1336 | | |
1337 | | llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel) override; |
1338 | | Address GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) override; |
1339 | | |
1340 | | /// The NeXT/Apple runtimes do not support typed selectors; just emit an |
1341 | | /// untyped one. |
1342 | | llvm::Value *GetSelector(CodeGenFunction &CGF, |
1343 | | const ObjCMethodDecl *Method) override; |
1344 | | |
1345 | | llvm::Constant *GetEHType(QualType T) override; |
1346 | | |
1347 | | void GenerateCategory(const ObjCCategoryImplDecl *CMD) override; |
1348 | | |
1349 | | void GenerateClass(const ObjCImplementationDecl *ClassDecl) override; |
1350 | | |
1351 | 0 | void RegisterAlias(const ObjCCompatibleAliasDecl *OAD) override {} |
1352 | | |
1353 | | llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF, |
1354 | | const ObjCProtocolDecl *PD) override; |
1355 | | |
1356 | | llvm::FunctionCallee GetPropertyGetFunction() override; |
1357 | | llvm::FunctionCallee GetPropertySetFunction() override; |
1358 | | llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic, |
1359 | | bool copy) override; |
1360 | | llvm::FunctionCallee GetGetStructFunction() override; |
1361 | | llvm::FunctionCallee GetSetStructFunction() override; |
1362 | | llvm::FunctionCallee GetCppAtomicObjectGetFunction() override; |
1363 | | llvm::FunctionCallee GetCppAtomicObjectSetFunction() override; |
1364 | | llvm::FunctionCallee EnumerationMutationFunction() override; |
1365 | | |
1366 | | void EmitTryStmt(CodeGen::CodeGenFunction &CGF, |
1367 | | const ObjCAtTryStmt &S) override; |
1368 | | void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF, |
1369 | | const ObjCAtSynchronizedStmt &S) override; |
1370 | | void EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, const Stmt &S); |
1371 | | void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, const ObjCAtThrowStmt &S, |
1372 | | bool ClearInsertionPoint=true) override; |
1373 | | llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF, |
1374 | | Address AddrWeakObj) override; |
1375 | | void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF, |
1376 | | llvm::Value *src, Address dst) override; |
1377 | | void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF, |
1378 | | llvm::Value *src, Address dest, |
1379 | | bool threadlocal = false) override; |
1380 | | void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF, |
1381 | | llvm::Value *src, Address dest, |
1382 | | llvm::Value *ivarOffset) override; |
1383 | | void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF, |
1384 | | llvm::Value *src, Address dest) override; |
1385 | | void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF, |
1386 | | Address dest, Address src, |
1387 | | llvm::Value *size) override; |
1388 | | |
1389 | | LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, QualType ObjectTy, |
1390 | | llvm::Value *BaseValue, const ObjCIvarDecl *Ivar, |
1391 | | unsigned CVRQualifiers) override; |
1392 | | llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF, |
1393 | | const ObjCInterfaceDecl *Interface, |
1394 | | const ObjCIvarDecl *Ivar) override; |
1395 | | }; |
1396 | | |
1397 | | class CGObjCNonFragileABIMac : public CGObjCCommonMac { |
1398 | | private: |
1399 | | friend ProtocolMethodLists; |
1400 | | ObjCNonFragileABITypesHelper ObjCTypes; |
1401 | | llvm::GlobalVariable* ObjCEmptyCacheVar; |
1402 | | llvm::Constant* ObjCEmptyVtableVar; |
1403 | | |
1404 | | /// SuperClassReferences - uniqued super class references. |
1405 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> SuperClassReferences; |
1406 | | |
1407 | | /// MetaClassReferences - uniqued meta class references. |
1408 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> MetaClassReferences; |
1409 | | |
1410 | | /// EHTypeReferences - uniqued class ehtype references. |
1411 | | llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> EHTypeReferences; |
1412 | | |
1413 | | /// VTableDispatchMethods - List of methods for which we generate |
1414 | | /// vtable-based message dispatch. |
1415 | | llvm::DenseSet<Selector> VTableDispatchMethods; |
1416 | | |
1417 | | /// DefinedMetaClasses - List of defined meta-classes. |
1418 | | std::vector<llvm::GlobalValue*> DefinedMetaClasses; |
1419 | | |
1420 | | /// isVTableDispatchedSelector - Returns true if SEL is a |
1421 | | /// vtable-based selector. |
1422 | | bool isVTableDispatchedSelector(Selector Sel); |
1423 | | |
1424 | | /// FinishNonFragileABIModule - Write out global data structures at the end of |
1425 | | /// processing a translation unit. |
1426 | | void FinishNonFragileABIModule(); |
1427 | | |
1428 | | /// AddModuleClassList - Add the given list of class pointers to the |
1429 | | /// module with the provided symbol and section names. |
1430 | | void AddModuleClassList(ArrayRef<llvm::GlobalValue *> Container, |
1431 | | StringRef SymbolName, StringRef SectionName); |
1432 | | |
1433 | | llvm::GlobalVariable * BuildClassRoTInitializer(unsigned flags, |
1434 | | unsigned InstanceStart, |
1435 | | unsigned InstanceSize, |
1436 | | const ObjCImplementationDecl *ID); |
1437 | | llvm::GlobalVariable *BuildClassObject(const ObjCInterfaceDecl *CI, |
1438 | | bool isMetaclass, |
1439 | | llvm::Constant *IsAGV, |
1440 | | llvm::Constant *SuperClassGV, |
1441 | | llvm::Constant *ClassRoGV, |
1442 | | bool HiddenVisibility); |
1443 | | |
1444 | | void emitMethodConstant(ConstantArrayBuilder &builder, |
1445 | | const ObjCMethodDecl *MD, |
1446 | | bool forProtocol); |
1447 | | |
1448 | | /// Emit the method list for the given implementation. The return value |
1449 | | /// has type MethodListnfABITy. |
1450 | | llvm::Constant *emitMethodList(Twine Name, MethodListType MLT, |
1451 | | ArrayRef<const ObjCMethodDecl *> Methods); |
1452 | | |
1453 | | /// EmitIvarList - Emit the ivar list for the given |
1454 | | /// implementation. If ForClass is true the list of class ivars |
1455 | | /// (i.e. metaclass ivars) is emitted, otherwise the list of |
1456 | | /// interface ivars will be emitted. The return value has type |
1457 | | /// IvarListnfABIPtrTy. |
1458 | | llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID); |
1459 | | |
1460 | | llvm::Constant *EmitIvarOffsetVar(const ObjCInterfaceDecl *ID, |
1461 | | const ObjCIvarDecl *Ivar, |
1462 | | unsigned long int offset); |
1463 | | |
1464 | | /// GetOrEmitProtocol - Get the protocol object for the given |
1465 | | /// declaration, emitting it if necessary. The return value has type |
1466 | | /// ProtocolPtrTy. |
1467 | | llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD) override; |
1468 | | |
1469 | | /// GetOrEmitProtocolRef - Get a forward reference to the protocol |
1470 | | /// object for the given declaration, emitting it if needed. These |
1471 | | /// forward references will be filled in with empty bodies if no |
1472 | | /// definition is seen. The return value has type ProtocolPtrTy. |
1473 | | llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) override; |
1474 | | |
1475 | | /// EmitProtocolList - Generate the list of referenced |
1476 | | /// protocols. The return value has type ProtocolListPtrTy. |
1477 | | llvm::Constant *EmitProtocolList(Twine Name, |
1478 | | ObjCProtocolDecl::protocol_iterator begin, |
1479 | | ObjCProtocolDecl::protocol_iterator end); |
1480 | | |
1481 | | CodeGen::RValue EmitVTableMessageSend(CodeGen::CodeGenFunction &CGF, |
1482 | | ReturnValueSlot Return, |
1483 | | QualType ResultType, |
1484 | | Selector Sel, |
1485 | | llvm::Value *Receiver, |
1486 | | QualType Arg0Ty, |
1487 | | bool IsSuper, |
1488 | | const CallArgList &CallArgs, |
1489 | | const ObjCMethodDecl *Method); |
1490 | | |
1491 | | /// GetClassGlobal - Return the global variable for the Objective-C |
1492 | | /// class of the given name. |
1493 | | llvm::Constant *GetClassGlobal(StringRef Name, |
1494 | | ForDefinition_t IsForDefinition, |
1495 | | bool Weak = false, bool DLLImport = false); |
1496 | | llvm::Constant *GetClassGlobal(const ObjCInterfaceDecl *ID, |
1497 | | bool isMetaclass, |
1498 | | ForDefinition_t isForDefinition); |
1499 | | |
1500 | | llvm::Constant *GetClassGlobalForClassRef(const ObjCInterfaceDecl *ID); |
1501 | | |
1502 | | llvm::Value *EmitLoadOfClassRef(CodeGenFunction &CGF, |
1503 | | const ObjCInterfaceDecl *ID, |
1504 | | llvm::GlobalVariable *Entry); |
1505 | | |
1506 | | /// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy, |
1507 | | /// for the given class reference. |
1508 | | llvm::Value *EmitClassRef(CodeGenFunction &CGF, |
1509 | | const ObjCInterfaceDecl *ID); |
1510 | | |
1511 | | llvm::Value *EmitClassRefFromId(CodeGenFunction &CGF, |
1512 | | IdentifierInfo *II, |
1513 | | const ObjCInterfaceDecl *ID); |
1514 | | |
1515 | | llvm::Value *EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) override; |
1516 | | |
1517 | | /// EmitSuperClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy, |
1518 | | /// for the given super class reference. |
1519 | | llvm::Value *EmitSuperClassRef(CodeGenFunction &CGF, |
1520 | | const ObjCInterfaceDecl *ID); |
1521 | | |
1522 | | /// EmitMetaClassRef - Return a Value * of the address of _class_t |
1523 | | /// meta-data |
1524 | | llvm::Value *EmitMetaClassRef(CodeGenFunction &CGF, |
1525 | | const ObjCInterfaceDecl *ID, bool Weak); |
1526 | | |
1527 | | /// ObjCIvarOffsetVariable - Returns the ivar offset variable for |
1528 | | /// the given ivar. |
1529 | | /// |
1530 | | llvm::GlobalVariable * ObjCIvarOffsetVariable( |
1531 | | const ObjCInterfaceDecl *ID, |
1532 | | const ObjCIvarDecl *Ivar); |
1533 | | |
1534 | | /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy, |
1535 | | /// for the given selector. |
1536 | | llvm::Value *EmitSelector(CodeGenFunction &CGF, Selector Sel); |
1537 | | Address EmitSelectorAddr(Selector Sel); |
1538 | | |
1539 | | /// GetInterfaceEHType - Get the cached ehtype for the given Objective-C |
1540 | | /// interface. The return value has type EHTypePtrTy. |
1541 | | llvm::Constant *GetInterfaceEHType(const ObjCInterfaceDecl *ID, |
1542 | | ForDefinition_t IsForDefinition); |
1543 | | |
1544 | 2.59k | StringRef getMetaclassSymbolPrefix() const { return "OBJC_METACLASS_$_"; } |
1545 | | |
1546 | 4.55k | StringRef getClassSymbolPrefix() const { return "OBJC_CLASS_$_"; } |
1547 | | |
1548 | | void GetClassSizeInfo(const ObjCImplementationDecl *OID, |
1549 | | uint32_t &InstanceStart, |
1550 | | uint32_t &InstanceSize); |
1551 | | |
1552 | | // Shamelessly stolen from Analysis/CFRefCount.cpp |
1553 | 1.20k | Selector GetNullarySelector(const char* name) const { |
1554 | 1.20k | IdentifierInfo* II = &CGM.getContext().Idents.get(name); |
1555 | 1.20k | return CGM.getContext().Selectors.getSelector(0, &II); |
1556 | 1.20k | } |
1557 | | |
1558 | 56 | Selector GetUnarySelector(const char* name) const { |
1559 | 56 | IdentifierInfo* II = &CGM.getContext().Idents.get(name); |
1560 | 56 | return CGM.getContext().Selectors.getSelector(1, &II); |
1561 | 56 | } |
1562 | | |
1563 | | /// ImplementationIsNonLazy - Check whether the given category or |
1564 | | /// class implementation is "non-lazy". |
1565 | | bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const; |
1566 | | |
1567 | | bool IsIvarOffsetKnownIdempotent(const CodeGen::CodeGenFunction &CGF, |
1568 | 1.37k | const ObjCIvarDecl *IV) { |
1569 | | // Annotate the load as an invariant load iff inside an instance method |
1570 | | // and ivar belongs to instance method's class and one of its super class. |
1571 | | // This check is needed because the ivar offset is a lazily |
1572 | | // initialised value that may depend on objc_msgSend to perform a fixup on |
1573 | | // the first message dispatch. |
1574 | | // |
1575 | | // An additional opportunity to mark the load as invariant arises when the |
1576 | | // base of the ivar access is a parameter to an Objective C method. |
1577 | | // However, because the parameters are not available in the current |
1578 | | // interface, we cannot perform this check. |
1579 | | // |
1580 | | // Note that for direct methods, because objc_msgSend is skipped, |
1581 | | // and that the method may be inlined, this optimization actually |
1582 | | // can't be performed. |
1583 | 1.37k | if (const ObjCMethodDecl *MD = |
1584 | 1.23k | dyn_cast_or_null<ObjCMethodDecl>(CGF.CurFuncDecl)) |
1585 | 1.23k | if (MD->isInstanceMethod() && !MD->isDirectMethod()) |
1586 | 1.22k | if (const ObjCInterfaceDecl *ID = MD->getClassInterface()) |
1587 | 1.22k | return IV->getContainingInterface()->isSuperClassOf(ID); |
1588 | 148 | return false; |
1589 | 148 | } |
1590 | | |
1591 | 3.29k | bool isClassLayoutKnownStatically(const ObjCInterfaceDecl *ID) { |
1592 | | // NSObject is a fixed size. If we can see the @implementation of a class |
1593 | | // which inherits from NSObject then we know that all it's offsets also must |
1594 | | // be fixed. FIXME: Can we do this if see a chain of super classes with |
1595 | | // implementations leading to NSObject? |
1596 | 3.29k | return ID->getImplementation() && ID->getSuperClass()3.14k && |
1597 | 2.46k | ID->getSuperClass()->getName() == "NSObject"; |
1598 | 3.29k | } |
1599 | | |
1600 | | public: |
1601 | | CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm); |
1602 | | |
1603 | | llvm::Constant *getNSConstantStringClassRef() override; |
1604 | | |
1605 | | llvm::Function *ModuleInitFunction() override; |
1606 | | |
1607 | | CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
1608 | | ReturnValueSlot Return, |
1609 | | QualType ResultType, Selector Sel, |
1610 | | llvm::Value *Receiver, |
1611 | | const CallArgList &CallArgs, |
1612 | | const ObjCInterfaceDecl *Class, |
1613 | | const ObjCMethodDecl *Method) override; |
1614 | | |
1615 | | CodeGen::RValue |
1616 | | GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
1617 | | ReturnValueSlot Return, QualType ResultType, |
1618 | | Selector Sel, const ObjCInterfaceDecl *Class, |
1619 | | bool isCategoryImpl, llvm::Value *Receiver, |
1620 | | bool IsClassMessage, const CallArgList &CallArgs, |
1621 | | const ObjCMethodDecl *Method) override; |
1622 | | |
1623 | | llvm::Value *GetClass(CodeGenFunction &CGF, |
1624 | | const ObjCInterfaceDecl *ID) override; |
1625 | | |
1626 | | llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel) override |
1627 | 12.0k | { return EmitSelector(CGF, Sel); } |
1628 | | Address GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) override |
1629 | 0 | { return EmitSelectorAddr(Sel); } |
1630 | | |
1631 | | /// The NeXT/Apple runtimes do not support typed selectors; just emit an |
1632 | | /// untyped one. |
1633 | | llvm::Value *GetSelector(CodeGenFunction &CGF, |
1634 | | const ObjCMethodDecl *Method) override |
1635 | 0 | { return EmitSelector(CGF, Method->getSelector()); } |
1636 | | |
1637 | | void GenerateCategory(const ObjCCategoryImplDecl *CMD) override; |
1638 | | |
1639 | | void GenerateClass(const ObjCImplementationDecl *ClassDecl) override; |
1640 | | |
1641 | 1 | void RegisterAlias(const ObjCCompatibleAliasDecl *OAD) override {} |
1642 | | |
1643 | | llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF, |
1644 | | const ObjCProtocolDecl *PD) override; |
1645 | | |
1646 | | llvm::Constant *GetEHType(QualType T) override; |
1647 | | |
1648 | 103 | llvm::FunctionCallee GetPropertyGetFunction() override { |
1649 | 103 | return ObjCTypes.getGetPropertyFn(); |
1650 | 103 | } |
1651 | 63 | llvm::FunctionCallee GetPropertySetFunction() override { |
1652 | 63 | return ObjCTypes.getSetPropertyFn(); |
1653 | 63 | } |
1654 | | |
1655 | | llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic, |
1656 | 86 | bool copy) override { |
1657 | 86 | return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy); |
1658 | 86 | } |
1659 | | |
1660 | 17 | llvm::FunctionCallee GetSetStructFunction() override { |
1661 | 17 | return ObjCTypes.getCopyStructFn(); |
1662 | 17 | } |
1663 | | |
1664 | 16 | llvm::FunctionCallee GetGetStructFunction() override { |
1665 | 16 | return ObjCTypes.getCopyStructFn(); |
1666 | 16 | } |
1667 | | |
1668 | 5 | llvm::FunctionCallee GetCppAtomicObjectSetFunction() override { |
1669 | 5 | return ObjCTypes.getCppAtomicObjectFunction(); |
1670 | 5 | } |
1671 | | |
1672 | 4 | llvm::FunctionCallee GetCppAtomicObjectGetFunction() override { |
1673 | 4 | return ObjCTypes.getCppAtomicObjectFunction(); |
1674 | 4 | } |
1675 | | |
1676 | 67 | llvm::FunctionCallee EnumerationMutationFunction() override { |
1677 | 67 | return ObjCTypes.getEnumerationMutationFn(); |
1678 | 67 | } |
1679 | | |
1680 | | void EmitTryStmt(CodeGen::CodeGenFunction &CGF, |
1681 | | const ObjCAtTryStmt &S) override; |
1682 | | void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF, |
1683 | | const ObjCAtSynchronizedStmt &S) override; |
1684 | | void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, const ObjCAtThrowStmt &S, |
1685 | | bool ClearInsertionPoint=true) override; |
1686 | | llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF, |
1687 | | Address AddrWeakObj) override; |
1688 | | void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF, |
1689 | | llvm::Value *src, Address edst) override; |
1690 | | void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF, |
1691 | | llvm::Value *src, Address dest, |
1692 | | bool threadlocal = false) override; |
1693 | | void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF, |
1694 | | llvm::Value *src, Address dest, |
1695 | | llvm::Value *ivarOffset) override; |
1696 | | void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF, |
1697 | | llvm::Value *src, Address dest) override; |
1698 | | void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF, |
1699 | | Address dest, Address src, |
1700 | | llvm::Value *size) override; |
1701 | | LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, QualType ObjectTy, |
1702 | | llvm::Value *BaseValue, const ObjCIvarDecl *Ivar, |
1703 | | unsigned CVRQualifiers) override; |
1704 | | llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF, |
1705 | | const ObjCInterfaceDecl *Interface, |
1706 | | const ObjCIvarDecl *Ivar) override; |
1707 | | }; |
1708 | | |
1709 | | /// A helper class for performing the null-initialization of a return |
1710 | | /// value. |
1711 | | struct NullReturnState { |
1712 | | llvm::BasicBlock *NullBB; |
1713 | 12.2k | NullReturnState() : NullBB(nullptr) {} |
1714 | | |
1715 | | /// Perform a null-check of the given receiver. |
1716 | 35 | void init(CodeGenFunction &CGF, llvm::Value *receiver) { |
1717 | | // Make blocks for the null-receiver and call edges. |
1718 | 35 | NullBB = CGF.createBasicBlock("msgSend.null-receiver"); |
1719 | 35 | llvm::BasicBlock *callBB = CGF.createBasicBlock("msgSend.call"); |
1720 | | |
1721 | | // Check for a null receiver and, if there is one, jump to the |
1722 | | // null-receiver block. There's no point in trying to avoid it: |
1723 | | // we're always going to put *something* there, because otherwise |
1724 | | // we shouldn't have done this null-check in the first place. |
1725 | 35 | llvm::Value *isNull = CGF.Builder.CreateIsNull(receiver); |
1726 | 35 | CGF.Builder.CreateCondBr(isNull, NullBB, callBB); |
1727 | | |
1728 | | // Otherwise, start performing the call. |
1729 | 35 | CGF.EmitBlock(callBB); |
1730 | 35 | } |
1731 | | |
1732 | | /// Complete the null-return operation. It is valid to call this |
1733 | | /// regardless of whether 'init' has been called. |
1734 | | RValue complete(CodeGenFunction &CGF, |
1735 | | ReturnValueSlot returnSlot, |
1736 | | RValue result, |
1737 | | QualType resultType, |
1738 | | const CallArgList &CallArgs, |
1739 | 12.2k | const ObjCMethodDecl *Method) { |
1740 | | // If we never had to do a null-check, just use the raw result. |
1741 | 12.2k | if (!NullBB) return result12.2k ; |
1742 | | |
1743 | | // The continuation block. This will be left null if we don't have an |
1744 | | // IP, which can happen if the method we're calling is marked noreturn. |
1745 | 35 | llvm::BasicBlock *contBB = nullptr; |
1746 | | |
1747 | | // Finish the call path. |
1748 | 35 | llvm::BasicBlock *callBB = CGF.Builder.GetInsertBlock(); |
1749 | 35 | if (callBB) { |
1750 | 35 | contBB = CGF.createBasicBlock("msgSend.cont"); |
1751 | 35 | CGF.Builder.CreateBr(contBB); |
1752 | 35 | } |
1753 | | |
1754 | | // Okay, start emitting the null-receiver block. |
1755 | 35 | CGF.EmitBlock(NullBB); |
1756 | | |
1757 | | // Release any consumed arguments we've got. |
1758 | 35 | if (Method) { |
1759 | 35 | CallArgList::const_iterator I = CallArgs.begin(); |
1760 | 35 | for (ObjCMethodDecl::param_const_iterator i = Method->param_begin(), |
1761 | 61 | e = Method->param_end(); i != e; ++i, ++I26 ) { |
1762 | 26 | const ParmVarDecl *ParamDecl = (*i); |
1763 | 26 | if (ParamDecl->hasAttr<NSConsumedAttr>()) { |
1764 | 10 | RValue RV = I->getRValue(CGF); |
1765 | 10 | assert(RV.isScalar() && |
1766 | 10 | "NullReturnState::complete - arg not on object"); |
1767 | 10 | CGF.EmitARCRelease(RV.getScalarVal(), ARCImpreciseLifetime); |
1768 | 16 | } else { |
1769 | 16 | QualType QT = ParamDecl->getType(); |
1770 | 16 | auto *RT = QT->getAs<RecordType>(); |
1771 | 16 | if (RT && RT->getDecl()->isParamDestroyedInCallee()) { |
1772 | 16 | RValue RV = I->getRValue(CGF); |
1773 | 16 | QualType::DestructionKind DtorKind = QT.isDestructedType(); |
1774 | 16 | switch (DtorKind) { |
1775 | 8 | case QualType::DK_cxx_destructor: |
1776 | 8 | CGF.destroyCXXObject(CGF, RV.getAggregateAddress(), QT); |
1777 | 8 | break; |
1778 | 8 | case QualType::DK_nontrivial_c_struct: |
1779 | 8 | CGF.destroyNonTrivialCStruct(CGF, RV.getAggregateAddress(), QT); |
1780 | 8 | break; |
1781 | 0 | default: |
1782 | 0 | llvm_unreachable("unexpected dtor kind"); |
1783 | 0 | break; |
1784 | 16 | } |
1785 | 16 | } |
1786 | 16 | } |
1787 | 26 | } |
1788 | 35 | } |
1789 | | |
1790 | | // The phi code below assumes that we haven't needed any control flow yet. |
1791 | 35 | assert(CGF.Builder.GetInsertBlock() == NullBB); |
1792 | | |
1793 | | // If we've got a void return, just jump to the continuation block. |
1794 | 35 | if (result.isScalar() && resultType->isVoidType()23 ) { |
1795 | | // No jumps required if the message-send was noreturn. |
1796 | 19 | if (contBB) CGF.EmitBlock(contBB); |
1797 | 19 | return result; |
1798 | 19 | } |
1799 | | |
1800 | | // If we've got a scalar return, build a phi. |
1801 | 16 | if (result.isScalar()) { |
1802 | | // Derive the null-initialization value. |
1803 | 4 | llvm::Value *null = |
1804 | 4 | CGF.EmitFromMemory(CGF.CGM.EmitNullConstant(resultType), resultType); |
1805 | | |
1806 | | // If no join is necessary, just flow out. |
1807 | 4 | if (!contBB) return RValue::get(null)0 ; |
1808 | | |
1809 | | // Otherwise, build a phi. |
1810 | 4 | CGF.EmitBlock(contBB); |
1811 | 4 | llvm::PHINode *phi = CGF.Builder.CreatePHI(null->getType(), 2); |
1812 | 4 | phi->addIncoming(result.getScalarVal(), callBB); |
1813 | 4 | phi->addIncoming(null, NullBB); |
1814 | 4 | return RValue::get(phi); |
1815 | 4 | } |
1816 | | |
1817 | | // If we've got an aggregate return, null the buffer out. |
1818 | | // FIXME: maybe we should be doing things differently for all the |
1819 | | // cases where the ABI has us returning (1) non-agg values in |
1820 | | // memory or (2) agg values in registers. |
1821 | 12 | if (result.isAggregate()) { |
1822 | 9 | assert(result.isAggregate() && "null init of non-aggregate result?"); |
1823 | 9 | if (!returnSlot.isUnused()) |
1824 | 7 | CGF.EmitNullInitialization(result.getAggregateAddress(), resultType); |
1825 | 9 | if (contBB) CGF.EmitBlock(contBB); |
1826 | 9 | return result; |
1827 | 9 | } |
1828 | | |
1829 | | // Complex types. |
1830 | 3 | CGF.EmitBlock(contBB); |
1831 | 3 | CodeGenFunction::ComplexPairTy callResult = result.getComplexVal(); |
1832 | | |
1833 | | // Find the scalar type and its zero value. |
1834 | 3 | llvm::Type *scalarTy = callResult.first->getType(); |
1835 | 3 | llvm::Constant *scalarZero = llvm::Constant::getNullValue(scalarTy); |
1836 | | |
1837 | | // Build phis for both coordinates. |
1838 | 3 | llvm::PHINode *real = CGF.Builder.CreatePHI(scalarTy, 2); |
1839 | 3 | real->addIncoming(callResult.first, callBB); |
1840 | 3 | real->addIncoming(scalarZero, NullBB); |
1841 | 3 | llvm::PHINode *imag = CGF.Builder.CreatePHI(scalarTy, 2); |
1842 | 3 | imag->addIncoming(callResult.second, callBB); |
1843 | 3 | imag->addIncoming(scalarZero, NullBB); |
1844 | 3 | return RValue::getComplex(real, imag); |
1845 | 3 | } |
1846 | | }; |
1847 | | |
1848 | | } // end anonymous namespace |
1849 | | |
1850 | | /* *** Helper Functions *** */ |
1851 | | |
1852 | | /// getConstantGEP() - Help routine to construct simple GEPs. |
1853 | | static llvm::Constant *getConstantGEP(llvm::LLVMContext &VMContext, |
1854 | | llvm::GlobalVariable *C, unsigned idx0, |
1855 | 17.4k | unsigned idx1) { |
1856 | 17.4k | llvm::Value *Idxs[] = { |
1857 | 17.4k | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx0), |
1858 | 17.4k | llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx1) |
1859 | 17.4k | }; |
1860 | 17.4k | return llvm::ConstantExpr::getGetElementPtr(C->getValueType(), C, Idxs); |
1861 | 17.4k | } |
1862 | | |
1863 | | /// hasObjCExceptionAttribute - Return true if this class or any super |
1864 | | /// class has the __objc_exception__ attribute. |
1865 | | static bool hasObjCExceptionAttribute(ASTContext &Context, |
1866 | 1.92k | const ObjCInterfaceDecl *OID) { |
1867 | 1.92k | if (OID->hasAttr<ObjCExceptionAttr>()) |
1868 | 64 | return true; |
1869 | 1.86k | if (const ObjCInterfaceDecl *Super = OID->getSuperClass()) |
1870 | 838 | return hasObjCExceptionAttribute(Context, Super); |
1871 | 1.02k | return false; |
1872 | 1.02k | } |
1873 | | |
1874 | | static llvm::GlobalValue::LinkageTypes |
1875 | 12.3k | getLinkageTypeForObjCMetadata(CodeGenModule &CGM, StringRef Section) { |
1876 | 12.3k | if (CGM.getTriple().isOSBinFormatMachO() && |
1877 | 12.0k | (Section.empty() || Section.startswith("__DATA")12.0k )) |
1878 | 11.4k | return llvm::GlobalValue::InternalLinkage; |
1879 | 937 | return llvm::GlobalValue::PrivateLinkage; |
1880 | 937 | } |
1881 | | |
1882 | | /// A helper function to create an internal or private global variable. |
1883 | | static llvm::GlobalVariable * |
1884 | | finishAndCreateGlobal(ConstantInitBuilder::StructBuilder &Builder, |
1885 | 3.84k | const llvm::Twine &Name, CodeGenModule &CGM) { |
1886 | 3.84k | std::string SectionName; |
1887 | 3.84k | if (CGM.getTriple().isOSBinFormatMachO()) |
1888 | 3.76k | SectionName = "__DATA, __objc_const"; |
1889 | 3.84k | auto *GV = Builder.finishAndCreateGlobal( |
1890 | 3.84k | Name, CGM.getPointerAlign(), /*constant*/ false, |
1891 | 3.84k | getLinkageTypeForObjCMetadata(CGM, SectionName)); |
1892 | 3.84k | GV->setSection(SectionName); |
1893 | 3.84k | return GV; |
1894 | 3.84k | } |
1895 | | |
1896 | | /* *** CGObjCMac Public Interface *** */ |
1897 | | |
1898 | | CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) : CGObjCCommonMac(cgm), |
1899 | 167 | ObjCTypes(cgm) { |
1900 | 167 | ObjCABI = 1; |
1901 | 167 | EmitImageInfo(); |
1902 | 167 | } |
1903 | | |
1904 | | /// GetClass - Return a reference to the class for the given interface |
1905 | | /// decl. |
1906 | | llvm::Value *CGObjCMac::GetClass(CodeGenFunction &CGF, |
1907 | 50 | const ObjCInterfaceDecl *ID) { |
1908 | 50 | return EmitClassRef(CGF, ID); |
1909 | 50 | } |
1910 | | |
1911 | | /// GetSelector - Return the pointer to the unique'd string for this selector. |
1912 | 220 | llvm::Value *CGObjCMac::GetSelector(CodeGenFunction &CGF, Selector Sel) { |
1913 | 220 | return EmitSelector(CGF, Sel); |
1914 | 220 | } |
1915 | 1 | Address CGObjCMac::GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) { |
1916 | 1 | return EmitSelectorAddr(Sel); |
1917 | 1 | } |
1918 | | llvm::Value *CGObjCMac::GetSelector(CodeGenFunction &CGF, const ObjCMethodDecl |
1919 | 0 | *Method) { |
1920 | 0 | return EmitSelector(CGF, Method->getSelector()); |
1921 | 0 | } |
1922 | | |
1923 | 3 | llvm::Constant *CGObjCMac::GetEHType(QualType T) { |
1924 | 3 | if (T->isObjCIdType() || |
1925 | 2 | T->isObjCQualifiedIdType()) { |
1926 | 1 | return CGM.GetAddrOfRTTIDescriptor( |
1927 | 1 | CGM.getContext().getObjCIdRedefinitionType(), /*ForEH=*/true); |
1928 | 1 | } |
1929 | 2 | if (T->isObjCClassType() || |
1930 | 1 | T->isObjCQualifiedClassType()) { |
1931 | 1 | return CGM.GetAddrOfRTTIDescriptor( |
1932 | 1 | CGM.getContext().getObjCClassRedefinitionType(), /*ForEH=*/true); |
1933 | 1 | } |
1934 | 1 | if (T->isObjCObjectPointerType()) |
1935 | 1 | return CGM.GetAddrOfRTTIDescriptor(T, /*ForEH=*/true); |
1936 | | |
1937 | 0 | llvm_unreachable("asking for catch type for ObjC type in fragile runtime"); |
1938 | 0 | } |
1939 | | |
1940 | | /// Generate a constant CFString object. |
1941 | | /* |
1942 | | struct __builtin_CFString { |
1943 | | const int *isa; // point to __CFConstantStringClassReference |
1944 | | int flags; |
1945 | | const char *str; |
1946 | | long length; |
1947 | | }; |
1948 | | */ |
1949 | | |
1950 | | /// or Generate a constant NSString object. |
1951 | | /* |
1952 | | struct __builtin_NSString { |
1953 | | const int *isa; // point to __NSConstantStringClassReference |
1954 | | const char *str; |
1955 | | unsigned int length; |
1956 | | }; |
1957 | | */ |
1958 | | |
1959 | | ConstantAddress |
1960 | 5.24k | CGObjCCommonMac::GenerateConstantString(const StringLiteral *SL) { |
1961 | 5.24k | return (!CGM.getLangOpts().NoConstantCFStrings |
1962 | 5.24k | ? CGM.GetAddrOfConstantCFString(SL) |
1963 | 9 | : GenerateConstantNSString(SL)); |
1964 | 5.24k | } |
1965 | | |
1966 | | static llvm::StringMapEntry<llvm::GlobalVariable *> & |
1967 | | GetConstantStringEntry(llvm::StringMap<llvm::GlobalVariable *> &Map, |
1968 | 9 | const StringLiteral *Literal, unsigned &StringLength) { |
1969 | 9 | StringRef String = Literal->getString(); |
1970 | 9 | StringLength = String.size(); |
1971 | 9 | return *Map.insert(std::make_pair(String, nullptr)).first; |
1972 | 9 | } |
1973 | | |
1974 | 3 | llvm::Constant *CGObjCMac::getNSConstantStringClassRef() { |
1975 | 3 | if (llvm::Value *V = ConstantStringClassRef) |
1976 | 1 | return cast<llvm::Constant>(V); |
1977 | | |
1978 | 2 | auto &StringClass = CGM.getLangOpts().ObjCConstantStringClass; |
1979 | 2 | std::string str = |
1980 | 1 | StringClass.empty() ? "_NSConstantStringClassReference" |
1981 | 1 | : "_" + StringClass + "ClassReference"; |
1982 | | |
1983 | 2 | llvm::Type *PTy = llvm::ArrayType::get(CGM.IntTy, 0); |
1984 | 2 | auto GV = CGM.CreateRuntimeVariable(PTy, str); |
1985 | 2 | auto V = llvm::ConstantExpr::getBitCast(GV, CGM.IntTy->getPointerTo()); |
1986 | 2 | ConstantStringClassRef = V; |
1987 | 2 | return V; |
1988 | 2 | } |
1989 | | |
1990 | 4 | llvm::Constant *CGObjCNonFragileABIMac::getNSConstantStringClassRef() { |
1991 | 4 | if (llvm::Value *V = ConstantStringClassRef) |
1992 | 1 | return cast<llvm::Constant>(V); |
1993 | | |
1994 | 3 | auto &StringClass = CGM.getLangOpts().ObjCConstantStringClass; |
1995 | 3 | std::string str = |
1996 | 1 | StringClass.empty() ? "OBJC_CLASS_$_NSConstantString" |
1997 | 2 | : "OBJC_CLASS_$_" + StringClass; |
1998 | 3 | llvm::Constant *GV = GetClassGlobal(str, NotForDefinition); |
1999 | | |
2000 | | // Make sure the result is of the correct type. |
2001 | 3 | auto V = llvm::ConstantExpr::getBitCast(GV, CGM.IntTy->getPointerTo()); |
2002 | | |
2003 | 3 | ConstantStringClassRef = V; |
2004 | 3 | return V; |
2005 | 3 | } |
2006 | | |
2007 | | ConstantAddress |
2008 | 9 | CGObjCCommonMac::GenerateConstantNSString(const StringLiteral *Literal) { |
2009 | 9 | unsigned StringLength = 0; |
2010 | 9 | llvm::StringMapEntry<llvm::GlobalVariable *> &Entry = |
2011 | 9 | GetConstantStringEntry(NSConstantStringMap, Literal, StringLength); |
2012 | | |
2013 | 9 | if (auto *C = Entry.second) |
2014 | 2 | return ConstantAddress(C, CharUnits::fromQuantity(C->getAlignment())); |
2015 | | |
2016 | | // If we don't already have it, get _NSConstantStringClassReference. |
2017 | 7 | llvm::Constant *Class = getNSConstantStringClassRef(); |
2018 | | |
2019 | | // If we don't already have it, construct the type for a constant NSString. |
2020 | 7 | if (!NSConstantStringType) { |
2021 | 5 | NSConstantStringType = |
2022 | 5 | llvm::StructType::create({ |
2023 | 5 | CGM.Int32Ty->getPointerTo(), |
2024 | 5 | CGM.Int8PtrTy, |
2025 | 5 | CGM.IntTy |
2026 | 5 | }, "struct.__builtin_NSString"); |
2027 | 5 | } |
2028 | | |
2029 | 7 | ConstantInitBuilder Builder(CGM); |
2030 | 7 | auto Fields = Builder.beginStruct(NSConstantStringType); |
2031 | | |
2032 | | // Class pointer. |
2033 | 7 | Fields.add(Class); |
2034 | | |
2035 | | // String pointer. |
2036 | 7 | llvm::Constant *C = |
2037 | 7 | llvm::ConstantDataArray::getString(VMContext, Entry.first()); |
2038 | | |
2039 | 7 | llvm::GlobalValue::LinkageTypes Linkage = llvm::GlobalValue::PrivateLinkage; |
2040 | 7 | bool isConstant = !CGM.getLangOpts().WritableStrings; |
2041 | | |
2042 | 7 | auto *GV = new llvm::GlobalVariable(CGM.getModule(), C->getType(), isConstant, |
2043 | 7 | Linkage, C, ".str"); |
2044 | 7 | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); |
2045 | | // Don't enforce the target's minimum global alignment, since the only use |
2046 | | // of the string is via this class initializer. |
2047 | 7 | GV->setAlignment(llvm::Align(1)); |
2048 | 7 | Fields.addBitCast(GV, CGM.Int8PtrTy); |
2049 | | |
2050 | | // String length. |
2051 | 7 | Fields.addInt(CGM.IntTy, StringLength); |
2052 | | |
2053 | | // The struct. |
2054 | 7 | CharUnits Alignment = CGM.getPointerAlign(); |
2055 | 7 | GV = Fields.finishAndCreateGlobal("_unnamed_nsstring_", Alignment, |
2056 | 7 | /*constant*/ true, |
2057 | 7 | llvm::GlobalVariable::PrivateLinkage); |
2058 | 7 | const char *NSStringSection = "__OBJC,__cstring_object,regular,no_dead_strip"; |
2059 | 7 | const char *NSStringNonFragileABISection = |
2060 | 7 | "__DATA,__objc_stringobj,regular,no_dead_strip"; |
2061 | | // FIXME. Fix section. |
2062 | 7 | GV->setSection(CGM.getLangOpts().ObjCRuntime.isNonFragile() |
2063 | 4 | ? NSStringNonFragileABISection |
2064 | 3 | : NSStringSection); |
2065 | 7 | Entry.second = GV; |
2066 | | |
2067 | 7 | return ConstantAddress(GV, Alignment); |
2068 | 7 | } |
2069 | | |
2070 | | enum { |
2071 | | kCFTaggedObjectID_Integer = (1 << 1) + 1 |
2072 | | }; |
2073 | | |
2074 | | /// Generates a message send where the super is the receiver. This is |
2075 | | /// a message send to self with special delivery semantics indicating |
2076 | | /// which class's method should be called. |
2077 | | CodeGen::RValue |
2078 | | CGObjCMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF, |
2079 | | ReturnValueSlot Return, |
2080 | | QualType ResultType, |
2081 | | Selector Sel, |
2082 | | const ObjCInterfaceDecl *Class, |
2083 | | bool isCategoryImpl, |
2084 | | llvm::Value *Receiver, |
2085 | | bool IsClassMessage, |
2086 | | const CodeGen::CallArgList &CallArgs, |
2087 | 23 | const ObjCMethodDecl *Method) { |
2088 | | // Create and init a super structure; this is a (receiver, class) |
2089 | | // pair we will pass to objc_msgSendSuper. |
2090 | 23 | Address ObjCSuper = |
2091 | 23 | CGF.CreateTempAlloca(ObjCTypes.SuperTy, CGF.getPointerAlign(), |
2092 | 23 | "objc_super"); |
2093 | 23 | llvm::Value *ReceiverAsObject = |
2094 | 23 | CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy); |
2095 | 23 | CGF.Builder.CreateStore(ReceiverAsObject, |
2096 | 23 | CGF.Builder.CreateStructGEP(ObjCSuper, 0)); |
2097 | | |
2098 | | // If this is a class message the metaclass is passed as the target. |
2099 | 23 | llvm::Value *Target; |
2100 | 23 | if (IsClassMessage) { |
2101 | 7 | if (isCategoryImpl) { |
2102 | | // Message sent to 'super' in a class method defined in a category |
2103 | | // implementation requires an odd treatment. |
2104 | | // If we are in a class method, we must retrieve the |
2105 | | // _metaclass_ for the current class, pointed at by |
2106 | | // the class's "isa" pointer. The following assumes that |
2107 | | // isa" is the first ivar in a class (which it must be). |
2108 | 0 | Target = EmitClassRef(CGF, Class->getSuperClass()); |
2109 | 0 | Target = CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, Target, 0); |
2110 | 0 | Target = CGF.Builder.CreateAlignedLoad(Target, CGF.getPointerAlign()); |
2111 | 7 | } else { |
2112 | 7 | llvm::Constant *MetaClassPtr = EmitMetaClassRef(Class); |
2113 | 7 | llvm::Value *SuperPtr = |
2114 | 7 | CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, MetaClassPtr, 1); |
2115 | 7 | llvm::Value *Super = |
2116 | 7 | CGF.Builder.CreateAlignedLoad(SuperPtr, CGF.getPointerAlign()); |
2117 | 7 | Target = Super; |
2118 | 7 | } |
2119 | 16 | } else if (isCategoryImpl) |
2120 | 0 | Target = EmitClassRef(CGF, Class->getSuperClass()); |
2121 | 16 | else { |
2122 | 16 | llvm::Value *ClassPtr = EmitSuperClassRef(Class); |
2123 | 16 | ClassPtr = CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, ClassPtr, 1); |
2124 | 16 | Target = CGF.Builder.CreateAlignedLoad(ClassPtr, CGF.getPointerAlign()); |
2125 | 16 | } |
2126 | | // FIXME: We shouldn't need to do this cast, rectify the ASTContext and |
2127 | | // ObjCTypes types. |
2128 | 23 | llvm::Type *ClassTy = |
2129 | 23 | CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType()); |
2130 | 23 | Target = CGF.Builder.CreateBitCast(Target, ClassTy); |
2131 | 23 | CGF.Builder.CreateStore(Target, CGF.Builder.CreateStructGEP(ObjCSuper, 1)); |
2132 | 23 | return EmitMessageSend(CGF, Return, ResultType, Sel, ObjCSuper.getPointer(), |
2133 | 23 | ObjCTypes.SuperPtrCTy, true, CallArgs, Method, Class, |
2134 | 23 | ObjCTypes); |
2135 | 23 | } |
2136 | | |
2137 | | /// Generate code for a message send expression. |
2138 | | CodeGen::RValue CGObjCMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF, |
2139 | | ReturnValueSlot Return, |
2140 | | QualType ResultType, |
2141 | | Selector Sel, |
2142 | | llvm::Value *Receiver, |
2143 | | const CallArgList &CallArgs, |
2144 | | const ObjCInterfaceDecl *Class, |
2145 | 195 | const ObjCMethodDecl *Method) { |
2146 | 195 | return EmitMessageSend(CGF, Return, ResultType, Sel, Receiver, |
2147 | 195 | CGF.getContext().getObjCIdType(), false, CallArgs, |
2148 | 195 | Method, Class, ObjCTypes); |
2149 | 195 | } |
2150 | | |
2151 | 4.13k | static bool isWeakLinkedClass(const ObjCInterfaceDecl *ID) { |
2152 | 9.13k | do { |
2153 | 9.13k | if (ID->isWeakImported()) |
2154 | 5 | return true; |
2155 | 9.12k | } while ((ID = ID->getSuperClass())); |
2156 | | |
2157 | 4.12k | return false; |
2158 | 4.13k | } |
2159 | | |
2160 | | CodeGen::RValue |
2161 | | CGObjCCommonMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF, |
2162 | | ReturnValueSlot Return, |
2163 | | QualType ResultType, |
2164 | | Selector Sel, |
2165 | | llvm::Value *Arg0, |
2166 | | QualType Arg0Ty, |
2167 | | bool IsSuper, |
2168 | | const CallArgList &CallArgs, |
2169 | | const ObjCMethodDecl *Method, |
2170 | | const ObjCInterfaceDecl *ClassReceiver, |
2171 | 12.2k | const ObjCCommonTypesHelper &ObjCTypes) { |
2172 | 12.2k | CodeGenTypes &Types = CGM.getTypes(); |
2173 | 12.2k | auto selTy = CGF.getContext().getObjCSelType(); |
2174 | 12.2k | llvm::Value *SelValue; |
2175 | | |
2176 | 12.2k | if (Method && Method->isDirectMethod()11.4k ) { |
2177 | | // Direct methods will synthesize the proper `_cmd` internally, |
2178 | | // so just don't bother with setting the `_cmd` argument. |
2179 | 67 | assert(!IsSuper); |
2180 | 67 | SelValue = llvm::UndefValue::get(Types.ConvertType(selTy)); |
2181 | 12.1k | } else { |
2182 | 12.1k | SelValue = GetSelector(CGF, Sel); |
2183 | 12.1k | } |
2184 | | |
2185 | 12.2k | CallArgList ActualArgs; |
2186 | 12.2k | if (!IsSuper) |
2187 | 11.7k | Arg0 = CGF.Builder.CreateBitCast(Arg0, ObjCTypes.ObjectPtrTy); |
2188 | 12.2k | ActualArgs.add(RValue::get(Arg0), Arg0Ty); |
2189 | 12.2k | ActualArgs.add(RValue::get(SelValue), selTy); |
2190 | 12.2k | ActualArgs.addFrom(CallArgs); |
2191 | | |
2192 | | // If we're calling a method, use the formal signature. |
2193 | 12.2k | MessageSendInfo MSI = getMessageSendInfo(Method, ResultType, ActualArgs); |
2194 | | |
2195 | 12.2k | if (Method) |
2196 | 12.2k | assert(CGM.getContext().getCanonicalType(Method->getReturnType()) == |
2197 | 12.2k | CGM.getContext().getCanonicalType(ResultType) && |
2198 | 12.2k | "Result type mismatch!"); |
2199 | | |
2200 | 12.2k | bool ReceiverCanBeNull = true; |
2201 | | |
2202 | | // Super dispatch assumes that self is non-null; even the messenger |
2203 | | // doesn't have a null check internally. |
2204 | 12.2k | if (IsSuper) { |
2205 | 498 | ReceiverCanBeNull = false; |
2206 | | |
2207 | | // If this is a direct dispatch of a class method, check whether the class, |
2208 | | // or anything in its hierarchy, was weak-linked. |
2209 | 11.7k | } else if (ClassReceiver && Method4.16k && Method->isClassMethod()4.15k ) { |
2210 | 4.13k | ReceiverCanBeNull = isWeakLinkedClass(ClassReceiver); |
2211 | | |
2212 | | // If we're emitting a method, and self is const (meaning just ARC, for now), |
2213 | | // and the receiver is a load of self, then self is a valid object. |
2214 | 7.62k | } else if (auto CurMethod = |
2215 | 402 | dyn_cast_or_null<ObjCMethodDecl>(CGF.CurCodeDecl)) { |
2216 | 402 | auto Self = CurMethod->getSelfDecl(); |
2217 | 402 | if (Self->getType().isConstQualified()) { |
2218 | 29 | if (auto LI = dyn_cast<llvm::LoadInst>(Arg0->stripPointerCasts())) { |
2219 | 23 | llvm::Value *SelfAddr = CGF.GetAddrOfLocalVar(Self).getPointer(); |
2220 | 23 | if (SelfAddr == LI->getPointerOperand()) { |
2221 | 14 | ReceiverCanBeNull = false; |
2222 | 14 | } |
2223 | 23 | } |
2224 | 29 | } |
2225 | 402 | } |
2226 | | |
2227 | 12.2k | bool RequiresNullCheck = false; |
2228 | | |
2229 | 12.2k | llvm::FunctionCallee Fn = nullptr; |
2230 | 12.2k | if (Method && Method->isDirectMethod()11.4k ) { |
2231 | 67 | Fn = GenerateDirectMethod(Method, Method->getClassInterface()); |
2232 | 12.1k | } else if (CGM.ReturnSlotInterferesWithArgs(MSI.CallInfo)) { |
2233 | 19 | if (ReceiverCanBeNull) RequiresNullCheck = true12 ; |
2234 | 15 | Fn = (ObjCABI == 2) ? ObjCTypes.getSendStretFn2(IsSuper) |
2235 | 4 | : ObjCTypes.getSendStretFn(IsSuper); |
2236 | 12.1k | } else if (CGM.ReturnTypeUsesFPRet(ResultType)) { |
2237 | 2 | Fn = (ObjCABI == 2) ? ObjCTypes.getSendFpretFn2(IsSuper) |
2238 | 4 | : ObjCTypes.getSendFpretFn(IsSuper); |
2239 | 12.1k | } else if (CGM.ReturnTypeUsesFP2Ret(ResultType)) { |
2240 | 0 | Fn = (ObjCABI == 2) ? ObjCTypes.getSendFp2RetFn2(IsSuper) |
2241 | 1 | : ObjCTypes.getSendFp2retFn(IsSuper); |
2242 | 12.1k | } else { |
2243 | | // arm64 uses objc_msgSend for stret methods and yet null receiver check |
2244 | | // must be made for it. |
2245 | 12.1k | if (ReceiverCanBeNull && CGM.ReturnTypeUsesSRet(MSI.CallInfo)7.52k ) |
2246 | 6 | RequiresNullCheck = true; |
2247 | 11.9k | Fn = (ObjCABI == 2) ? ObjCTypes.getSendFn2(IsSuper) |
2248 | 209 | : ObjCTypes.getSendFn(IsSuper); |
2249 | 12.1k | } |
2250 | | |
2251 | | // Cast function to proper signature |
2252 | 12.2k | llvm::Constant *BitcastFn = cast<llvm::Constant>( |
2253 | 12.2k | CGF.Builder.CreateBitCast(Fn.getCallee(), MSI.MessengerType)); |
2254 | | |
2255 | | // We don't need to emit a null check to zero out an indirect result if the |
2256 | | // result is ignored. |
2257 | 12.2k | if (Return.isUnused()) |
2258 | 15 | RequiresNullCheck = false; |
2259 | | |
2260 | | // Emit a null-check if there's a consumed argument other than the receiver. |
2261 | 12.2k | if (!RequiresNullCheck && CGM.getLangOpts().ObjCAutoRefCount12.2k && Method325 ) { |
2262 | 184 | for (const auto *ParamDecl : Method->parameters()) { |
2263 | 184 | if (ParamDecl->isDestroyedInCallee()) { |
2264 | 24 | RequiresNullCheck = true; |
2265 | 24 | break; |
2266 | 24 | } |
2267 | 184 | } |
2268 | 268 | } |
2269 | | |
2270 | 12.2k | NullReturnState nullReturn; |
2271 | 12.2k | if (RequiresNullCheck) { |
2272 | 33 | nullReturn.init(CGF, Arg0); |
2273 | 33 | } |
2274 | | |
2275 | 12.2k | llvm::CallBase *CallSite; |
2276 | 12.2k | CGCallee Callee = CGCallee::forDirect(BitcastFn); |
2277 | 12.2k | RValue rvalue = CGF.EmitCall(MSI.CallInfo, Callee, Return, ActualArgs, |
2278 | 12.2k | &CallSite); |
2279 | | |
2280 | | // Mark the call as noreturn if the method is marked noreturn and the |
2281 | | // receiver cannot be null. |
2282 | 12.2k | if (Method && Method->hasAttr<NoReturnAttr>()11.4k && !ReceiverCanBeNull16 ) { |
2283 | 8 | CallSite->setDoesNotReturn(); |
2284 | 8 | } |
2285 | | |
2286 | 12.2k | return nullReturn.complete(CGF, Return, rvalue, ResultType, CallArgs, |
2287 | 12.2k | RequiresNullCheck ? Method33 : nullptr); |
2288 | 12.2k | } |
2289 | | |
2290 | | static Qualifiers::GC GetGCAttrTypeForType(ASTContext &Ctx, QualType FQT, |
2291 | 756 | bool pointee = false) { |
2292 | | // Note that GC qualification applies recursively to C pointer types |
2293 | | // that aren't otherwise decorated. This is weird, but it's probably |
2294 | | // an intentional workaround to the unreliable placement of GC qualifiers. |
2295 | 756 | if (FQT.isObjCGCStrong()) |
2296 | 50 | return Qualifiers::Strong; |
2297 | | |
2298 | 706 | if (FQT.isObjCGCWeak()) |
2299 | 48 | return Qualifiers::Weak; |
2300 | | |
2301 | 658 | if (auto ownership = FQT.getObjCLifetime()) { |
2302 | | // Ownership does not apply recursively to C pointer types. |
2303 | 175 | if (pointee) return Qualifiers::GCNone0 ; |
2304 | 175 | switch (ownership) { |
2305 | 31 | case Qualifiers::OCL_Weak: return Qualifiers::Weak; |
2306 | 128 | case Qualifiers::OCL_Strong: return Qualifiers::Strong; |
2307 | 16 | case Qualifiers::OCL_ExplicitNone: return Qualifiers::GCNone; |
2308 | 0 | case Qualifiers::OCL_Autoreleasing: llvm_unreachable("autoreleasing ivar?"); |
2309 | 0 | case Qualifiers::OCL_None: llvm_unreachable("known nonzero"); |
2310 | 0 | } |
2311 | 0 | llvm_unreachable("bad objc ownership"); |
2312 | 0 | } |
2313 | | |
2314 | | // Treat unqualified retainable pointers as strong. |
2315 | 483 | if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType()310 ) |
2316 | 175 | return Qualifiers::Strong; |
2317 | | |
2318 | | // Walk into C pointer types, but only in GC. |
2319 | 308 | if (Ctx.getLangOpts().getGC() != LangOptions::NonGC) { |
2320 | 244 | if (const PointerType *PT = FQT->getAs<PointerType>()) |
2321 | 75 | return GetGCAttrTypeForType(Ctx, PT->getPointeeType(), /*pointee*/ true); |
2322 | 233 | } |
2323 | | |
2324 | 233 | return Qualifiers::GCNone; |
2325 | 233 | } |
2326 | | |
2327 | | namespace { |
2328 | | struct IvarInfo { |
2329 | | CharUnits Offset; |
2330 | | uint64_t SizeInWords; |
2331 | | IvarInfo(CharUnits offset, uint64_t sizeInWords) |
2332 | 318 | : Offset(offset), SizeInWords(sizeInWords) {} |
2333 | | |
2334 | | // Allow sorting based on byte pos. |
2335 | 209 | bool operator<(const IvarInfo &other) const { |
2336 | 209 | return Offset < other.Offset; |
2337 | 209 | } |
2338 | | }; |
2339 | | |
2340 | | /// A helper class for building GC layout strings. |
2341 | | class IvarLayoutBuilder { |
2342 | | CodeGenModule &CGM; |
2343 | | |
2344 | | /// The start of the layout. Offsets will be relative to this value, |
2345 | | /// and entries less than this value will be silently discarded. |
2346 | | CharUnits InstanceBegin; |
2347 | | |
2348 | | /// The end of the layout. Offsets will never exceed this value. |
2349 | | CharUnits InstanceEnd; |
2350 | | |
2351 | | /// Whether we're generating the strong layout or the weak layout. |
2352 | | bool ForStrongLayout; |
2353 | | |
2354 | | /// Whether the offsets in IvarsInfo might be out-of-order. |
2355 | | bool IsDisordered = false; |
2356 | | |
2357 | | llvm::SmallVector<IvarInfo, 8> IvarsInfo; |
2358 | | |
2359 | | public: |
2360 | | IvarLayoutBuilder(CodeGenModule &CGM, CharUnits instanceBegin, |
2361 | | CharUnits instanceEnd, bool forStrongLayout) |
2362 | | : CGM(CGM), InstanceBegin(instanceBegin), InstanceEnd(instanceEnd), |
2363 | 284 | ForStrongLayout(forStrongLayout) { |
2364 | 284 | } |
2365 | | |
2366 | | void visitRecord(const RecordType *RT, CharUnits offset); |
2367 | | |
2368 | | template <class Iterator, class GetOffsetFn> |
2369 | | void visitAggregate(Iterator begin, Iterator end, |
2370 | | CharUnits aggrOffset, |
2371 | | const GetOffsetFn &getOffset); |
2372 | | |
2373 | | void visitField(const FieldDecl *field, CharUnits offset); |
2374 | | |
2375 | | /// Add the layout of a block implementation. |
2376 | | void visitBlock(const CGBlockInfo &blockInfo); |
2377 | | |
2378 | | /// Is there any information for an interesting bitmap? |
2379 | 284 | bool hasBitmapData() const { return !IvarsInfo.empty(); } |
2380 | | |
2381 | | llvm::Constant *buildBitmap(CGObjCCommonMac &CGObjC, |
2382 | | llvm::SmallVectorImpl<unsigned char> &buffer); |
2383 | | |
2384 | 22 | static void dump(ArrayRef<unsigned char> buffer) { |
2385 | 22 | const unsigned char *s = buffer.data(); |
2386 | 95 | for (unsigned i = 0, e = buffer.size(); i < e; i++73 ) |
2387 | 73 | if (!(s[i] & 0xf0)) |
2388 | 41 | printf("0x0%x%s", s[i], s[i] != 0 ? ", "19 : ""22 ); |
2389 | 32 | else |
2390 | 32 | printf("0x%x%s", s[i], s[i] != 0 ? ", " : ""0 ); |
2391 | 22 | printf("\n"); |
2392 | 22 | } |
2393 | | }; |
2394 | | } // end anonymous namespace |
2395 | | |
2396 | | llvm::Constant *CGObjCCommonMac::BuildGCBlockLayout(CodeGenModule &CGM, |
2397 | 33 | const CGBlockInfo &blockInfo) { |
2398 | | |
2399 | 33 | llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy); |
2400 | 33 | if (CGM.getLangOpts().getGC() == LangOptions::NonGC) |
2401 | 0 | return nullPtr; |
2402 | | |
2403 | 33 | IvarLayoutBuilder builder(CGM, CharUnits::Zero(), blockInfo.BlockSize, |
2404 | 33 | /*for strong layout*/ true); |
2405 | | |
2406 | 33 | builder.visitBlock(blockInfo); |
2407 | | |
2408 | 33 | if (!builder.hasBitmapData()) |
2409 | 0 | return nullPtr; |
2410 | | |
2411 | 33 | llvm::SmallVector<unsigned char, 32> buffer; |
2412 | 33 | llvm::Constant *C = builder.buildBitmap(*this, buffer); |
2413 | 33 | if (CGM.getLangOpts().ObjCGCBitmapPrint && !buffer.empty()15 ) { |
2414 | 15 | printf("\n block variable layout for block: "); |
2415 | 15 | builder.dump(buffer); |
2416 | 15 | } |
2417 | | |
2418 | 33 | return C; |
2419 | 33 | } |
2420 | | |
2421 | 33 | void IvarLayoutBuilder::visitBlock(const CGBlockInfo &blockInfo) { |
2422 | | // __isa is the first field in block descriptor and must assume by runtime's |
2423 | | // convention that it is GC'able. |
2424 | 33 | IvarsInfo.push_back(IvarInfo(CharUnits::Zero(), 1)); |
2425 | | |
2426 | 33 | const BlockDecl *blockDecl = blockInfo.getBlockDecl(); |
2427 | | |
2428 | | // Ignore the optional 'this' capture: C++ objects are not assumed |
2429 | | // to be GC'ed. |
2430 | | |
2431 | 33 | CharUnits lastFieldOffset; |
2432 | | |
2433 | | // Walk the captured variables. |
2434 | 91 | for (const auto &CI : blockDecl->captures()) { |
2435 | 91 | const VarDecl *variable = CI.getVariable(); |
2436 | 91 | QualType type = variable->getType(); |
2437 | | |
2438 | 91 | const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable); |
2439 | | |
2440 | | // Ignore constant captures. |
2441 | 91 | if (capture.isConstant()) continue0 ; |
2442 | | |
2443 | 91 | CharUnits fieldOffset = capture.getOffset(); |
2444 | | |
2445 | | // Block fields are not necessarily ordered; if we detect that we're |
2446 | | // adding them out-of-order, make sure we sort later. |
2447 | 91 | if (fieldOffset < lastFieldOffset) |
2448 | 16 | IsDisordered = true; |
2449 | 91 | lastFieldOffset = fieldOffset; |
2450 | | |
2451 | | // __block variables are passed by their descriptor address. |
2452 | 91 | if (CI.isByRef()) { |
2453 | 29 | IvarsInfo.push_back(IvarInfo(fieldOffset, /*size in words*/ 1)); |
2454 | 29 | continue; |
2455 | 29 | } |
2456 | | |
2457 | 62 | assert(!type->isArrayType() && "array variable should not be caught"); |
2458 | 62 | if (const RecordType *record = type->getAs<RecordType>()) { |
2459 | 7 | visitRecord(record, fieldOffset); |
2460 | 7 | continue; |
2461 | 7 | } |
2462 | | |
2463 | 55 | Qualifiers::GC GCAttr = GetGCAttrTypeForType(CGM.getContext(), type); |
2464 | | |
2465 | 55 | if (GCAttr == Qualifiers::Strong) { |
2466 | 27 | assert(CGM.getContext().getTypeSize(type) |
2467 | 27 | == CGM.getTarget().getPointerWidth(0)); |
2468 | 27 | IvarsInfo.push_back(IvarInfo(fieldOffset, /*size in words*/ 1)); |
2469 | 27 | } |
2470 | 55 | } |
2471 | 33 | } |
2472 | | |
2473 | | /// getBlockCaptureLifetime - This routine returns life time of the captured |
2474 | | /// block variable for the purpose of block layout meta-data generation. FQT is |
2475 | | /// the type of the variable captured in the block. |
2476 | | Qualifiers::ObjCLifetime CGObjCCommonMac::getBlockCaptureLifetime(QualType FQT, |
2477 | 1.16k | bool ByrefLayout) { |
2478 | | // If it has an ownership qualifier, we're done. |
2479 | 1.16k | if (auto lifetime = FQT.getObjCLifetime()) |
2480 | 720 | return lifetime; |
2481 | | |
2482 | | // If it doesn't, and this is ARC, it has no ownership. |
2483 | 447 | if (CGM.getLangOpts().ObjCAutoRefCount) |
2484 | 276 | return Qualifiers::OCL_None; |
2485 | | |
2486 | | // In MRC, retainable pointers are owned by non-__block variables. |
2487 | 171 | if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType()53 ) |
2488 | 124 | return ByrefLayout ? Qualifiers::OCL_ExplicitNone2 : Qualifiers::OCL_Strong122 ; |
2489 | | |
2490 | 47 | return Qualifiers::OCL_None; |
2491 | 47 | } |
2492 | | |
2493 | | void CGObjCCommonMac::UpdateRunSkipBlockVars(bool IsByref, |
2494 | | Qualifiers::ObjCLifetime LifeTime, |
2495 | | CharUnits FieldOffset, |
2496 | 1.16k | CharUnits FieldSize) { |
2497 | | // __block variables are passed by their descriptor address. |
2498 | 1.16k | if (IsByref) |
2499 | 236 | RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_BYREF, FieldOffset, |
2500 | 236 | FieldSize)); |
2501 | 933 | else if (LifeTime == Qualifiers::OCL_Strong) |
2502 | 367 | RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_STRONG, FieldOffset, |
2503 | 367 | FieldSize)); |
2504 | 566 | else if (LifeTime == Qualifiers::OCL_Weak) |
2505 | 298 | RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_WEAK, FieldOffset, |
2506 | 298 | FieldSize)); |
2507 | 268 | else if (LifeTime == Qualifiers::OCL_ExplicitNone) |
2508 | 47 | RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_UNRETAINED, FieldOffset, |
2509 | 47 | FieldSize)); |
2510 | 221 | else |
2511 | 221 | RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_NON_OBJECT_BYTES, |
2512 | 221 | FieldOffset, |
2513 | 221 | FieldSize)); |
2514 | 1.16k | } |
2515 | | |
2516 | | void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout, |
2517 | | const RecordDecl *RD, |
2518 | | ArrayRef<const FieldDecl*> RecFields, |
2519 | | CharUnits BytePos, bool &HasUnion, |
2520 | 151 | bool ByrefLayout) { |
2521 | 151 | bool IsUnion = (RD && RD->isUnion()); |
2522 | 151 | CharUnits MaxUnionSize = CharUnits::Zero(); |
2523 | 151 | const FieldDecl *MaxField = nullptr; |
2524 | 151 | const FieldDecl *LastFieldBitfieldOrUnnamed = nullptr; |
2525 | 151 | CharUnits MaxFieldOffset = CharUnits::Zero(); |
2526 | 151 | CharUnits LastBitfieldOrUnnamedOffset = CharUnits::Zero(); |
2527 | | |
2528 | 151 | if (RecFields.empty()) |
2529 | 24 | return; |
2530 | 127 | unsigned ByteSizeInBits = CGM.getTarget().getCharWidth(); |
2531 | | |
2532 | 504 | for (unsigned i = 0, e = RecFields.size(); i != e; ++i377 ) { |
2533 | 377 | const FieldDecl *Field = RecFields[i]; |
2534 | | // Note that 'i' here is actually the field index inside RD of Field, |
2535 | | // although this dependency is hidden. |
2536 | 377 | const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD); |
2537 | 377 | CharUnits FieldOffset = |
2538 | 377 | CGM.getContext().toCharUnitsFromBits(RL.getFieldOffset(i)); |
2539 | | |
2540 | | // Skip over unnamed or bitfields |
2541 | 377 | if (!Field->getIdentifier() || Field->isBitField()355 ) { |
2542 | 190 | LastFieldBitfieldOrUnnamed = Field; |
2543 | 190 | LastBitfieldOrUnnamedOffset = FieldOffset; |
2544 | 190 | continue; |
2545 | 190 | } |
2546 | | |
2547 | 187 | LastFieldBitfieldOrUnnamed = nullptr; |
2548 | 187 | QualType FQT = Field->getType(); |
2549 | 187 | if (FQT->isRecordType() || FQT->isUnionType()163 ) { |
2550 | 24 | if (FQT->isUnionType()) |
2551 | 4 | HasUnion = true; |
2552 | | |
2553 | 24 | BuildRCBlockVarRecordLayout(FQT->getAs<RecordType>(), |
2554 | 24 | BytePos + FieldOffset, HasUnion); |
2555 | 24 | continue; |
2556 | 24 | } |
2557 | | |
2558 | 163 | if (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) { |
2559 | 27 | auto *CArray = cast<ConstantArrayType>(Array); |
2560 | 27 | uint64_t ElCount = CArray->getSize().getZExtValue(); |
2561 | 27 | assert(CArray && "only array with known element size is supported"); |
2562 | 27 | FQT = CArray->getElementType(); |
2563 | 31 | while (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) { |
2564 | 4 | auto *CArray = cast<ConstantArrayType>(Array); |
2565 | 4 | ElCount *= CArray->getSize().getZExtValue(); |
2566 | 4 | FQT = CArray->getElementType(); |
2567 | 4 | } |
2568 | 27 | if (FQT->isRecordType() && ElCount4 ) { |
2569 | 4 | int OldIndex = RunSkipBlockVars.size() - 1; |
2570 | 4 | auto *RT = FQT->castAs<RecordType>(); |
2571 | 4 | BuildRCBlockVarRecordLayout(RT, BytePos + FieldOffset, HasUnion); |
2572 | | |
2573 | | // Replicate layout information for each array element. Note that |
2574 | | // one element is already done. |
2575 | 4 | uint64_t ElIx = 1; |
2576 | 16 | for (int FirstIndex = RunSkipBlockVars.size() - 1 ;ElIx < ElCount; ElIx++12 ) { |
2577 | 12 | CharUnits Size = CGM.getContext().getTypeSizeInChars(RT); |
2578 | 36 | for (int i = OldIndex+1; i <= FirstIndex; ++i24 ) |
2579 | 24 | RunSkipBlockVars.push_back( |
2580 | 24 | RUN_SKIP(RunSkipBlockVars[i].opcode, |
2581 | 24 | RunSkipBlockVars[i].block_var_bytepos + Size*ElIx, |
2582 | 24 | RunSkipBlockVars[i].block_var_size)); |
2583 | 12 | } |
2584 | 4 | continue; |
2585 | 4 | } |
2586 | 159 | } |
2587 | 159 | CharUnits FieldSize = CGM.getContext().getTypeSizeInChars(Field->getType()); |
2588 | 159 | if (IsUnion) { |
2589 | 32 | CharUnits UnionIvarSize = FieldSize; |
2590 | 32 | if (UnionIvarSize > MaxUnionSize) { |
2591 | 8 | MaxUnionSize = UnionIvarSize; |
2592 | 8 | MaxField = Field; |
2593 | 8 | MaxFieldOffset = FieldOffset; |
2594 | 8 | } |
2595 | 127 | } else { |
2596 | 127 | UpdateRunSkipBlockVars(false, |
2597 | 127 | getBlockCaptureLifetime(FQT, ByrefLayout), |
2598 | 127 | BytePos + FieldOffset, |
2599 | 127 | FieldSize); |
2600 | 127 | } |
2601 | 159 | } |
2602 | | |
2603 | 127 | if (LastFieldBitfieldOrUnnamed) { |
2604 | 34 | if (LastFieldBitfieldOrUnnamed->isBitField()) { |
2605 | | // Last field was a bitfield. Must update the info. |
2606 | 24 | uint64_t BitFieldSize |
2607 | 24 | = LastFieldBitfieldOrUnnamed->getBitWidthValue(CGM.getContext()); |
2608 | 24 | unsigned UnsSize = (BitFieldSize / ByteSizeInBits) + |
2609 | 24 | ((BitFieldSize % ByteSizeInBits) != 0); |
2610 | 24 | CharUnits Size = CharUnits::fromQuantity(UnsSize); |
2611 | 24 | Size += LastBitfieldOrUnnamedOffset; |
2612 | 24 | UpdateRunSkipBlockVars(false, |
2613 | 24 | getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType(), |
2614 | 24 | ByrefLayout), |
2615 | 24 | BytePos + LastBitfieldOrUnnamedOffset, |
2616 | 24 | Size); |
2617 | 10 | } else { |
2618 | 10 | assert(!LastFieldBitfieldOrUnnamed->getIdentifier() &&"Expected unnamed"); |
2619 | | // Last field was unnamed. Must update skip info. |
2620 | 10 | CharUnits FieldSize |
2621 | 10 | = CGM.getContext().getTypeSizeInChars(LastFieldBitfieldOrUnnamed->getType()); |
2622 | 10 | UpdateRunSkipBlockVars(false, |
2623 | 10 | getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType(), |
2624 | 10 | ByrefLayout), |
2625 | 10 | BytePos + LastBitfieldOrUnnamedOffset, |
2626 | 10 | FieldSize); |
2627 | 10 | } |
2628 | 34 | } |
2629 | | |
2630 | 127 | if (MaxField) |
2631 | 8 | UpdateRunSkipBlockVars(false, |
2632 | 8 | getBlockCaptureLifetime(MaxField->getType(), ByrefLayout), |
2633 | 8 | BytePos + MaxFieldOffset, |
2634 | 8 | MaxUnionSize); |
2635 | 127 | } |
2636 | | |
2637 | | void CGObjCCommonMac::BuildRCBlockVarRecordLayout(const RecordType *RT, |
2638 | | CharUnits BytePos, |
2639 | | bool &HasUnion, |
2640 | 151 | bool ByrefLayout) { |
2641 | 151 | const RecordDecl *RD = RT->getDecl(); |
2642 | 151 | SmallVector<const FieldDecl*, 16> Fields(RD->fields()); |
2643 | 151 | llvm::Type *Ty = CGM.getTypes().ConvertType(QualType(RT, 0)); |
2644 | 151 | const llvm::StructLayout *RecLayout = |
2645 | 151 | CGM.getDataLayout().getStructLayout(cast<llvm::StructType>(Ty)); |
2646 | | |
2647 | 151 | BuildRCRecordLayout(RecLayout, RD, Fields, BytePos, HasUnion, ByrefLayout); |
2648 | 151 | } |
2649 | | |
2650 | | /// InlineLayoutInstruction - This routine produce an inline instruction for the |
2651 | | /// block variable layout if it can. If not, it returns 0. Rules are as follow: |
2652 | | /// If ((uintptr_t) layout) < (1 << 12), the layout is inline. In the 64bit world, |
2653 | | /// an inline layout of value 0x0000000000000xyz is interpreted as follows: |
2654 | | /// x captured object pointers of BLOCK_LAYOUT_STRONG. Followed by |
2655 | | /// y captured object of BLOCK_LAYOUT_BYREF. Followed by |
2656 | | /// z captured object of BLOCK_LAYOUT_WEAK. If any of the above is missing, zero |
2657 | | /// replaces it. For example, 0x00000x00 means x BLOCK_LAYOUT_STRONG and no |
2658 | | /// BLOCK_LAYOUT_BYREF and no BLOCK_LAYOUT_WEAK objects are captured. |
2659 | | uint64_t CGObjCCommonMac::InlineLayoutInstruction( |
2660 | 219 | SmallVectorImpl<unsigned char> &Layout) { |
2661 | 219 | uint64_t Result = 0; |
2662 | 219 | if (Layout.size() <= 3) { |
2663 | 213 | unsigned size = Layout.size(); |
2664 | 213 | unsigned strong_word_count = 0, byref_word_count=0, weak_word_count=0; |
2665 | 213 | unsigned char inst; |
2666 | 213 | enum BLOCK_LAYOUT_OPCODE opcode ; |
2667 | 213 | switch (size) { |
2668 | 11 | case 3: |
2669 | 11 | inst = Layout[0]; |
2670 | 11 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2671 | 11 | if (opcode == BLOCK_LAYOUT_STRONG) |
2672 | 11 | strong_word_count = (inst & 0xF)+1; |
2673 | 0 | else |
2674 | 0 | return 0; |
2675 | 11 | inst = Layout[1]; |
2676 | 11 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2677 | 11 | if (opcode == BLOCK_LAYOUT_BYREF) |
2678 | 9 | byref_word_count = (inst & 0xF)+1; |
2679 | 2 | else |
2680 | 2 | return 0; |
2681 | 9 | inst = Layout[2]; |
2682 | 9 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2683 | 9 | if (opcode == BLOCK_LAYOUT_WEAK) |
2684 | 9 | weak_word_count = (inst & 0xF)+1; |
2685 | 0 | else |
2686 | 0 | return 0; |
2687 | 9 | break; |
2688 | | |
2689 | 43 | case 2: |
2690 | 43 | inst = Layout[0]; |
2691 | 43 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2692 | 43 | if (opcode == BLOCK_LAYOUT_STRONG) { |
2693 | 26 | strong_word_count = (inst & 0xF)+1; |
2694 | 26 | inst = Layout[1]; |
2695 | 26 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2696 | 26 | if (opcode == BLOCK_LAYOUT_BYREF) |
2697 | 16 | byref_word_count = (inst & 0xF)+1; |
2698 | 10 | else if (opcode == BLOCK_LAYOUT_WEAK) |
2699 | 8 | weak_word_count = (inst & 0xF)+1; |
2700 | 2 | else |
2701 | 2 | return 0; |
2702 | 17 | } |
2703 | 17 | else if (opcode == BLOCK_LAYOUT_BYREF) { |
2704 | 2 | byref_word_count = (inst & 0xF)+1; |
2705 | 2 | inst = Layout[1]; |
2706 | 2 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2707 | 2 | if (opcode == BLOCK_LAYOUT_WEAK) |
2708 | 2 | weak_word_count = (inst & 0xF)+1; |
2709 | 0 | else |
2710 | 0 | return 0; |
2711 | 15 | } |
2712 | 15 | else |
2713 | 15 | return 0; |
2714 | 26 | break; |
2715 | | |
2716 | 121 | case 1: |
2717 | 121 | inst = Layout[0]; |
2718 | 121 | opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2719 | 121 | if (opcode == BLOCK_LAYOUT_STRONG) |
2720 | 67 | strong_word_count = (inst & 0xF)+1; |
2721 | 54 | else if (opcode == BLOCK_LAYOUT_BYREF) |
2722 | 35 | byref_word_count = (inst & 0xF)+1; |
2723 | 19 | else if (opcode == BLOCK_LAYOUT_WEAK) |
2724 | 14 | weak_word_count = (inst & 0xF)+1; |
2725 | 5 | else |
2726 | 5 | return 0; |
2727 | 116 | break; |
2728 | | |
2729 | 38 | default: |
2730 | 38 | return 0; |
2731 | 151 | } |
2732 | | |
2733 | | // Cannot inline when any of the word counts is 15. Because this is one less |
2734 | | // than the actual work count (so 15 means 16 actual word counts), |
2735 | | // and we can only display 0 thru 15 word counts. |
2736 | 151 | if (strong_word_count == 16 || byref_word_count == 16 || weak_word_count == 16) |
2737 | 2 | return 0; |
2738 | | |
2739 | 149 | unsigned count = |
2740 | 149 | (strong_word_count != 0) + (byref_word_count != 0) + (weak_word_count != 0); |
2741 | | |
2742 | 149 | if (size == count) { |
2743 | 149 | if (strong_word_count) |
2744 | 98 | Result = strong_word_count; |
2745 | 149 | Result <<= 4; |
2746 | 149 | if (byref_word_count) |
2747 | 62 | Result += byref_word_count; |
2748 | 149 | Result <<= 4; |
2749 | 149 | if (weak_word_count) |
2750 | 31 | Result += weak_word_count; |
2751 | 149 | } |
2752 | 149 | } |
2753 | 155 | return Result; |
2754 | 219 | } |
2755 | | |
2756 | 274 | llvm::Constant *CGObjCCommonMac::getBitmapBlockLayout(bool ComputeByrefLayout) { |
2757 | 274 | llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy); |
2758 | 274 | if (RunSkipBlockVars.empty()) |
2759 | 55 | return nullPtr; |
2760 | 219 | unsigned WordSizeInBits = CGM.getTarget().getPointerWidth(0); |
2761 | 219 | unsigned ByteSizeInBits = CGM.getTarget().getCharWidth(); |
2762 | 219 | unsigned WordSizeInBytes = WordSizeInBits/ByteSizeInBits; |
2763 | | |
2764 | | // Sort on byte position; captures might not be allocated in order, |
2765 | | // and unions can do funny things. |
2766 | 219 | llvm::array_pod_sort(RunSkipBlockVars.begin(), RunSkipBlockVars.end()); |
2767 | 219 | SmallVector<unsigned char, 16> Layout; |
2768 | | |
2769 | 219 | unsigned size = RunSkipBlockVars.size(); |
2770 | 552 | for (unsigned i = 0; i < size; i++333 ) { |
2771 | 333 | enum BLOCK_LAYOUT_OPCODE opcode = RunSkipBlockVars[i].opcode; |
2772 | 333 | CharUnits start_byte_pos = RunSkipBlockVars[i].block_var_bytepos; |
2773 | 333 | CharUnits end_byte_pos = start_byte_pos; |
2774 | 333 | unsigned j = i+1; |
2775 | 567 | while (j < size) { |
2776 | 348 | if (opcode == RunSkipBlockVars[j].opcode) { |
2777 | 234 | end_byte_pos = RunSkipBlockVars[j++].block_var_bytepos; |
2778 | 234 | i++; |
2779 | 234 | } |
2780 | 114 | else |
2781 | 114 | break; |
2782 | 348 | } |
2783 | 333 | CharUnits size_in_bytes = |
2784 | 333 | end_byte_pos - start_byte_pos + RunSkipBlockVars[j-1].block_var_size; |
2785 | 333 | if (j < size) { |
2786 | 114 | CharUnits gap = |
2787 | 114 | RunSkipBlockVars[j].block_var_bytepos - |
2788 | 114 | RunSkipBlockVars[j-1].block_var_bytepos - RunSkipBlockVars[j-1].block_var_size; |
2789 | 114 | size_in_bytes += gap; |
2790 | 114 | } |
2791 | 333 | CharUnits residue_in_bytes = CharUnits::Zero(); |
2792 | 333 | if (opcode == BLOCK_LAYOUT_NON_OBJECT_BYTES) { |
2793 | 88 | residue_in_bytes = size_in_bytes % WordSizeInBytes; |
2794 | 88 | size_in_bytes -= residue_in_bytes; |
2795 | 88 | opcode = BLOCK_LAYOUT_NON_OBJECT_WORDS; |
2796 | 88 | } |
2797 | | |
2798 | 333 | unsigned size_in_words = size_in_bytes.getQuantity() / WordSizeInBytes; |
2799 | 339 | while (size_in_words >= 16) { |
2800 | | // Note that value in imm. is one less that the actual |
2801 | | // value. So, 0xf means 16 words follow! |
2802 | 6 | unsigned char inst = (opcode << 4) | 0xf; |
2803 | 6 | Layout.push_back(inst); |
2804 | 6 | size_in_words -= 16; |
2805 | 6 | } |
2806 | 333 | if (size_in_words > 0) { |
2807 | | // Note that value in imm. is one less that the actual |
2808 | | // value. So, we subtract 1 away! |
2809 | 306 | unsigned char inst = (opcode << 4) | (size_in_words-1); |
2810 | 306 | Layout.push_back(inst); |
2811 | 306 | } |
2812 | 333 | if (residue_in_bytes > CharUnits::Zero()) { |
2813 | 33 | unsigned char inst = |
2814 | 33 | (BLOCK_LAYOUT_NON_OBJECT_BYTES << 4) | (residue_in_bytes.getQuantity()-1); |
2815 | 33 | Layout.push_back(inst); |
2816 | 33 | } |
2817 | 333 | } |
2818 | | |
2819 | 288 | while (!Layout.empty()) { |
2820 | 250 | unsigned char inst = Layout.back(); |
2821 | 250 | enum BLOCK_LAYOUT_OPCODE opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2822 | 250 | if (opcode == BLOCK_LAYOUT_NON_OBJECT_BYTES || opcode == BLOCK_LAYOUT_NON_OBJECT_WORDS217 ) |
2823 | 69 | Layout.pop_back(); |
2824 | 181 | else |
2825 | 181 | break; |
2826 | 250 | } |
2827 | | |
2828 | 219 | uint64_t Result = InlineLayoutInstruction(Layout); |
2829 | 219 | if (Result != 0) { |
2830 | | // Block variable layout instruction has been inlined. |
2831 | 149 | if (CGM.getLangOpts().ObjCGCBitmapPrint) { |
2832 | 40 | if (ComputeByrefLayout) |
2833 | 0 | printf("\n Inline BYREF variable layout: "); |
2834 | 40 | else |
2835 | 40 | printf("\n Inline block variable layout: "); |
2836 | 40 | printf("0x0%" PRIx64 "", Result); |
2837 | 40 | if (auto numStrong = (Result & 0xF00) >> 8) |
2838 | 32 | printf(", BL_STRONG:%d", (int) numStrong); |
2839 | 40 | if (auto numByref = (Result & 0x0F0) >> 4) |
2840 | 24 | printf(", BL_BYREF:%d", (int) numByref); |
2841 | 40 | if (auto numWeak = (Result & 0x00F) >> 0) |
2842 | 16 | printf(", BL_WEAK:%d", (int) numWeak); |
2843 | 40 | printf(", BL_OPERATOR:0\n"); |
2844 | 40 | } |
2845 | 149 | return llvm::ConstantInt::get(CGM.IntPtrTy, Result); |
2846 | 149 | } |
2847 | | |
2848 | 70 | unsigned char inst = (BLOCK_LAYOUT_OPERATOR << 4) | 0; |
2849 | 70 | Layout.push_back(inst); |
2850 | 70 | std::string BitMap; |
2851 | 225 | for (unsigned i = 0, e = Layout.size(); i != e; i++155 ) |
2852 | 155 | BitMap += Layout[i]; |
2853 | | |
2854 | 70 | if (CGM.getLangOpts().ObjCGCBitmapPrint) { |
2855 | 27 | if (ComputeByrefLayout) |
2856 | 0 | printf("\n Byref variable layout: "); |
2857 | 27 | else |
2858 | 27 | printf("\n Block variable layout: "); |
2859 | 100 | for (unsigned i = 0, e = BitMap.size(); i != e; i++73 ) { |
2860 | 73 | unsigned char inst = BitMap[i]; |
2861 | 73 | enum BLOCK_LAYOUT_OPCODE opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4); |
2862 | 73 | unsigned delta = 1; |
2863 | 73 | switch (opcode) { |
2864 | 27 | case BLOCK_LAYOUT_OPERATOR: |
2865 | 27 | printf("BL_OPERATOR:"); |
2866 | 27 | delta = 0; |
2867 | 27 | break; |
2868 | 0 | case BLOCK_LAYOUT_NON_OBJECT_BYTES: |
2869 | 0 | printf("BL_NON_OBJECT_BYTES:"); |
2870 | 0 | break; |
2871 | 14 | case BLOCK_LAYOUT_NON_OBJECT_WORDS: |
2872 | 14 | printf("BL_NON_OBJECT_WORD:"); |
2873 | 14 | break; |
2874 | 4 | case BLOCK_LAYOUT_STRONG: |
2875 | 4 | printf("BL_STRONG:"); |
2876 | 4 | break; |
2877 | 2 | case BLOCK_LAYOUT_BYREF: |
2878 | 2 | printf("BL_BYREF:"); |
2879 | 2 | break; |
2880 | 8 | case BLOCK_LAYOUT_WEAK: |
2881 | 8 | printf("BL_WEAK:"); |
2882 | 8 | break; |
2883 | 18 | case BLOCK_LAYOUT_UNRETAINED: |
2884 | 18 | printf("BL_UNRETAINED:"); |
2885 | 18 | break; |
2886 | 73 | } |
2887 | | // Actual value of word count is one more that what is in the imm. |
2888 | | // field of the instruction |
2889 | 73 | printf("%d", (inst & 0xf) + delta); |
2890 | 73 | if (i < e-1) |
2891 | 46 | printf(", "); |
2892 | 27 | else |
2893 | 27 | printf("\n"); |
2894 | 73 | } |
2895 | 27 | } |
2896 | | |
2897 | 70 | auto *Entry = CreateCStringLiteral(BitMap, ObjCLabelType::ClassName, |
2898 | 70 | /*ForceNonFragileABI=*/true, |
2899 | 70 | /*NullTerminate=*/false); |
2900 | 70 | return getConstantGEP(VMContext, Entry, 0, 0); |
2901 | 70 | } |
2902 | | |
2903 | | static std::string getBlockLayoutInfoString( |
2904 | | const SmallVectorImpl<CGObjCCommonMac::RUN_SKIP> &RunSkipBlockVars, |
2905 | 365 | bool HasCopyDisposeHelpers) { |
2906 | 365 | std::string Str; |
2907 | 626 | for (const CGObjCCommonMac::RUN_SKIP &R : RunSkipBlockVars) { |
2908 | 626 | if (R.opcode == CGObjCCommonMac::BLOCK_LAYOUT_UNRETAINED) { |
2909 | | // Copy/dispose helpers don't have any information about |
2910 | | // __unsafe_unretained captures, so unconditionally concatenate a string. |
2911 | 28 | Str += "u"; |
2912 | 598 | } else if (HasCopyDisposeHelpers) { |
2913 | | // Information about __strong, __weak, or byref captures has already been |
2914 | | // encoded into the names of the copy/dispose helpers. We have to add a |
2915 | | // string here only when the copy/dispose helpers aren't generated (which |
2916 | | // happens when the block is non-escaping). |
2917 | 523 | continue; |
2918 | 75 | } else { |
2919 | 75 | switch (R.opcode) { |
2920 | 18 | case CGObjCCommonMac::BLOCK_LAYOUT_STRONG: |
2921 | 18 | Str += "s"; |
2922 | 18 | break; |
2923 | 4 | case CGObjCCommonMac::BLOCK_LAYOUT_BYREF: |
2924 | 4 | Str += "r"; |
2925 | 4 | break; |
2926 | 0 | case CGObjCCommonMac::BLOCK_LAYOUT_WEAK: |
2927 | 0 | Str += "w"; |
2928 | 0 | break; |
2929 | 53 | default: |
2930 | 53 | continue; |
2931 | 50 | } |
2932 | 50 | } |
2933 | 50 | Str += llvm::to_string(R.block_var_bytepos.getQuantity()); |
2934 | 50 | Str += "l" + llvm::to_string(R.block_var_size.getQuantity()); |
2935 | 50 | } |
2936 | 365 | return Str; |
2937 | 365 | } |
2938 | | |
2939 | | void CGObjCCommonMac::fillRunSkipBlockVars(CodeGenModule &CGM, |
2940 | 624 | const CGBlockInfo &blockInfo) { |
2941 | 624 | assert(CGM.getLangOpts().getGC() == LangOptions::NonGC); |
2942 | | |
2943 | 624 | RunSkipBlockVars.clear(); |
2944 | 624 | bool hasUnion = false; |
2945 | | |
2946 | 624 | unsigned WordSizeInBits = CGM.getTarget().getPointerWidth(0); |
2947 | 624 | unsigned ByteSizeInBits = CGM.getTarget().getCharWidth(); |
2948 | 624 | unsigned WordSizeInBytes = WordSizeInBits/ByteSizeInBits; |
2949 | | |
2950 | 624 | const BlockDecl *blockDecl = blockInfo.getBlockDecl(); |
2951 | | |
2952 | | // Calculate the basic layout of the block structure. |
2953 | 624 | const llvm::StructLayout *layout = |
2954 | 624 | CGM.getDataLayout().getStructLayout(blockInfo.StructureType); |
2955 | | |
2956 | | // Ignore the optional 'this' capture: C++ objects are not assumed |
2957 | | // to be GC'ed. |
2958 | 624 | if (blockInfo.BlockHeaderForcedGapSize != CharUnits::Zero()) |
2959 | 2 | UpdateRunSkipBlockVars(false, Qualifiers::OCL_None, |
2960 | 2 | blockInfo.BlockHeaderForcedGapOffset, |
2961 | 2 | blockInfo.BlockHeaderForcedGapSize); |
2962 | | // Walk the captured variables. |
2963 | 1.10k | for (const auto &CI : blockDecl->captures()) { |
2964 | 1.10k | const VarDecl *variable = CI.getVariable(); |
2965 | 1.10k | QualType type = variable->getType(); |
2966 | | |
2967 | 1.10k | const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable); |
2968 | | |
2969 | | // Ignore constant captures. |
2970 | 1.10k | if (capture.isConstant()) continue0 ; |
2971 | | |
2972 | 1.10k | CharUnits fieldOffset = |
2973 | 1.10k | CharUnits::fromQuantity(layout->getElementOffset(capture.getIndex())); |
2974 | | |
2975 | 1.10k | assert(!type->isArrayType() && "array variable should not be caught"); |
2976 | 1.10k | if (!CI.isByRef()) |
2977 | 870 | if (const RecordType *record = type->getAs<RecordType>()) { |
2978 | 108 | BuildRCBlockVarRecordLayout(record, fieldOffset, hasUnion); |
2979 | 108 | continue; |
2980 | 108 | } |
2981 | 998 | CharUnits fieldSize; |
2982 | 998 | if (CI.isByRef()) |
2983 | 236 | fieldSize = CharUnits::fromQuantity(WordSizeInBytes); |
2984 | 762 | else |
2985 | 762 | fieldSize = CGM.getContext().getTypeSizeInChars(type); |
2986 | 998 | UpdateRunSkipBlockVars(CI.isByRef(), getBlockCaptureLifetime(type, false), |
2987 | 998 | fieldOffset, fieldSize); |
2988 | 998 | } |
2989 | 624 | } |
2990 | | |
2991 | | llvm::Constant * |
2992 | | CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM, |
2993 | 259 | const CGBlockInfo &blockInfo) { |
2994 | 259 | fillRunSkipBlockVars(CGM, blockInfo); |
2995 | 259 | return getBitmapBlockLayout(false); |
2996 | 259 | } |
2997 | | |
2998 | | std::string CGObjCCommonMac::getRCBlockLayoutStr(CodeGenModule &CGM, |
2999 | 365 | const CGBlockInfo &blockInfo) { |
3000 | 365 | fillRunSkipBlockVars(CGM, blockInfo); |
3001 | 365 | return getBlockLayoutInfoString(RunSkipBlockVars, |
3002 | 365 | blockInfo.needsCopyDisposeHelpers()); |
3003 | 365 | } |
3004 | | |
3005 | | llvm::Constant *CGObjCCommonMac::BuildByrefLayout(CodeGen::CodeGenModule &CGM, |
3006 | 15 | QualType T) { |
3007 | 15 | assert(CGM.getLangOpts().getGC() == LangOptions::NonGC); |
3008 | 15 | assert(!T->isArrayType() && "__block array variable should not be caught"); |
3009 | 15 | CharUnits fieldOffset; |
3010 | 15 | RunSkipBlockVars.clear(); |
3011 | 15 | bool hasUnion = false; |
3012 | 15 | if (const RecordType *record = T->getAs<RecordType>()) { |
3013 | 15 | BuildRCBlockVarRecordLayout(record, fieldOffset, hasUnion, true /*ByrefLayout */); |
3014 | 15 | llvm::Constant *Result = getBitmapBlockLayout(true); |
3015 | 15 | if (isa<llvm::ConstantInt>(Result)) |
3016 | 1 | Result = llvm::ConstantExpr::getIntToPtr(Result, CGM.Int8PtrTy); |
3017 | 15 | return Result; |
3018 | 15 | } |
3019 | 0 | llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy); |
3020 | 0 | return nullPtr; |
3021 | 0 | } |
3022 | | |
3023 | | llvm::Value *CGObjCMac::GenerateProtocolRef(CodeGenFunction &CGF, |
3024 | 4 | const ObjCProtocolDecl *PD) { |
3025 | | // FIXME: I don't understand why gcc generates this, or where it is |
3026 | | // resolved. Investigate. Its also wasteful to look this up over and over. |
3027 | 4 | LazySymbols.insert(&CGM.getContext().Idents.get("Protocol")); |
3028 | | |
3029 | 4 | return llvm::ConstantExpr::getBitCast(GetProtocolRef(PD), |
3030 | 4 | ObjCTypes.getExternalProtocolPtrTy()); |
3031 | 4 | } |
3032 | | |
3033 | 19.9k | void CGObjCCommonMac::GenerateProtocol(const ObjCProtocolDecl *PD) { |
3034 | | // FIXME: We shouldn't need this, the protocol decl should contain enough |
3035 | | // information to tell us whether this was a declaration or a definition. |
3036 | 19.9k | DefinedProtocols.insert(PD->getIdentifier()); |
3037 | | |
3038 | | // If we have generated a forward reference to this protocol, emit |
3039 | | // it now. Otherwise do nothing, the protocol objects are lazily |
3040 | | // emitted. |
3041 | 19.9k | if (Protocols.count(PD->getIdentifier())) |
3042 | 0 | GetOrEmitProtocol(PD); |
3043 | 19.9k | } |
3044 | | |
3045 | 117 | llvm::Constant *CGObjCCommonMac::GetProtocolRef(const ObjCProtocolDecl *PD) { |
3046 | 117 | if (DefinedProtocols.count(PD->getIdentifier())) |
3047 | 114 | return GetOrEmitProtocol(PD); |
3048 | | |
3049 | 3 | return GetOrEmitProtocolRef(PD); |
3050 | 3 | } |
3051 | | |
3052 | | llvm::Value *CGObjCCommonMac::EmitClassRefViaRuntime( |
3053 | | CodeGenFunction &CGF, |
3054 | | const ObjCInterfaceDecl *ID, |
3055 | 2 | ObjCCommonTypesHelper &ObjCTypes) { |
3056 | 2 | llvm::FunctionCallee lookUpClassFn = ObjCTypes.getLookUpClassFn(); |
3057 | | |
3058 | 2 | llvm::Value *className = CGF.CGM |
3059 | 2 | .GetAddrOfConstantCString(std::string( |
3060 | 2 | ID->getObjCRuntimeNameAsString())) |
3061 | 2 | .getPointer(); |
3062 | 2 | ASTContext &ctx = CGF.CGM.getContext(); |
3063 | 2 | className = |
3064 | 2 | CGF.Builder.CreateBitCast(className, |
3065 | 2 | CGF.ConvertType( |
3066 | 2 | ctx.getPointerType(ctx.CharTy.withConst()))); |
3067 | 2 | llvm::CallInst *call = CGF.Builder.CreateCall(lookUpClassFn, className); |
3068 | 2 | call->setDoesNotThrow(); |
3069 | 2 | return call; |
3070 | 2 | } |
3071 | | |
3072 | | /* |
3073 | | // Objective-C 1.0 extensions |
3074 | | struct _objc_protocol { |
3075 | | struct _objc_protocol_extension *isa; |
3076 | | char *protocol_name; |
3077 | | struct _objc_protocol_list *protocol_list; |
3078 | | struct _objc__method_prototype_list *instance_methods; |
3079 | | struct _objc__method_prototype_list *class_methods |
3080 | | }; |
3081 | | |
3082 | | See EmitProtocolExtension(). |
3083 | | */ |
3084 | 16 | llvm::Constant *CGObjCMac::GetOrEmitProtocol(const ObjCProtocolDecl *PD) { |
3085 | 16 | llvm::GlobalVariable *Entry = Protocols[PD->getIdentifier()]; |
3086 | | |
3087 | | // Early exit if a defining object has already been generated. |
3088 | 16 | if (Entry && Entry->hasInitializer()1 ) |
3089 | 1 | return Entry; |
3090 | | |
3091 | | // Use the protocol definition, if there is one. |
3092 | 15 | if (const ObjCProtocolDecl *Def = PD->getDefinition()) |
3093 | 15 | PD = Def; |
3094 | | |
3095 | | // FIXME: I don't understand why gcc generates this, or where it is |
3096 | | // resolved. Investigate. Its also wasteful to look this up over and over. |
3097 | 15 | LazySymbols.insert(&CGM.getContext().Idents.get("Protocol")); |
3098 | | |
3099 | | // Construct method lists. |
3100 | 15 | auto methodLists = ProtocolMethodLists::get(PD); |
3101 | | |
3102 | 15 | ConstantInitBuilder builder(CGM); |
3103 | 15 | auto values = builder.beginStruct(ObjCTypes.ProtocolTy); |
3104 | 15 | values.add(EmitProtocolExtension(PD, methodLists)); |
3105 | 15 | values.add(GetClassName(PD->getObjCRuntimeNameAsString())); |
3106 | 15 | values.add(EmitProtocolList("OBJC_PROTOCOL_REFS_" + PD->getName(), |
3107 | 15 | PD->protocol_begin(), PD->protocol_end())); |
3108 | 15 | values.add(methodLists.emitMethodList(this, PD, |
3109 | 15 | ProtocolMethodLists::RequiredInstanceMethods)); |
3110 | 15 | values.add(methodLists.emitMethodList(this, PD, |
3111 | 15 | ProtocolMethodLists::RequiredClassMethods)); |
3112 | | |
3113 | 15 | if (Entry) { |
3114 | | // Already created, update the initializer. |
3115 | 0 | assert(Entry->hasPrivateLinkage()); |
3116 | 0 | values.finishAndSetAsInitializer(Entry); |
3117 | 15 | } else { |
3118 | 15 | Entry = values.finishAndCreateGlobal("OBJC_PROTOCOL_" + PD->getName(), |
3119 | 15 | CGM.getPointerAlign(), |
3120 | 15 | /*constant*/ false, |
3121 | 15 | llvm::GlobalValue::PrivateLinkage); |
3122 | 15 | Entry->setSection("__OBJC,__protocol,regular,no_dead_strip"); |
3123 | | |
3124 | 15 | Protocols[PD->getIdentifier()] = Entry; |
3125 | 15 | } |
3126 | 15 | CGM.addCompilerUsedGlobal(Entry); |
3127 | | |
3128 | 15 | return Entry; |
3129 | 15 | } |
3130 | | |
3131 | 1 | llvm::Constant *CGObjCMac::GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) { |
3132 | 1 | llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()]; |
3133 | | |
3134 | 1 | if (!Entry) { |
3135 | | // We use the initializer as a marker of whether this is a forward |
3136 | | // reference or not. At module finalization we add the empty |
3137 | | // contents for protocols which were referenced but never defined. |
3138 | 1 | Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolTy, |
3139 | 1 | false, llvm::GlobalValue::PrivateLinkage, |
3140 | 1 | nullptr, "OBJC_PROTOCOL_" + PD->getName()); |
3141 | 1 | Entry->setSection("__OBJC,__protocol,regular,no_dead_strip"); |
3142 | | // FIXME: Is this necessary? Why only for protocol? |
3143 | 1 | Entry->setAlignment(llvm::Align(4)); |
3144 | 1 | } |
3145 | | |
3146 | 1 | return Entry; |
3147 | 1 | } |
3148 | | |
3149 | | /* |
3150 | | struct _objc_protocol_extension { |
3151 | | uint32_t size; |
3152 | | struct objc_method_description_list *optional_instance_methods; |
3153 | | struct objc_method_description_list *optional_class_methods; |
3154 | | struct objc_property_list *instance_properties; |
3155 | | const char ** extendedMethodTypes; |
3156 | | struct objc_property_list *class_properties; |
3157 | | }; |
3158 | | */ |
3159 | | llvm::Constant * |
3160 | | CGObjCMac::EmitProtocolExtension(const ObjCProtocolDecl *PD, |
3161 | 15 | const ProtocolMethodLists &methodLists) { |
3162 | 15 | auto optInstanceMethods = |
3163 | 15 | methodLists.emitMethodList(this, PD, |
3164 | 15 | ProtocolMethodLists::OptionalInstanceMethods); |
3165 | 15 | auto optClassMethods = |
3166 | 15 | methodLists.emitMethodList(this, PD, |
3167 | 15 | ProtocolMethodLists::OptionalClassMethods); |
3168 | | |
3169 | 15 | auto extendedMethodTypes = |
3170 | 15 | EmitProtocolMethodTypes("OBJC_PROTOCOL_METHOD_TYPES_" + PD->getName(), |
3171 | 15 | methodLists.emitExtendedTypesArray(this), |
3172 | 15 | ObjCTypes); |
3173 | | |
3174 | 15 | auto instanceProperties = |
3175 | 15 | EmitPropertyList("OBJC_$_PROP_PROTO_LIST_" + PD->getName(), nullptr, PD, |
3176 | 15 | ObjCTypes, false); |
3177 | 15 | auto classProperties = |
3178 | 15 | EmitPropertyList("OBJC_$_CLASS_PROP_PROTO_LIST_" + PD->getName(), nullptr, |
3179 | 15 | PD, ObjCTypes, true); |
3180 | | |
3181 | | // Return null if no extension bits are used. |
3182 | 15 | if (optInstanceMethods->isNullValue() && |
3183 | 15 | optClassMethods->isNullValue() && |
3184 | 15 | extendedMethodTypes->isNullValue() && |
3185 | 9 | instanceProperties->isNullValue() && |
3186 | 9 | classProperties->isNullValue()) { |
3187 | 9 | return llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy); |
3188 | 9 | } |
3189 | | |
3190 | 6 | uint64_t size = |
3191 | 6 | CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ProtocolExtensionTy); |
3192 | | |
3193 | 6 | ConstantInitBuilder builder(CGM); |
3194 | 6 | auto values = builder.beginStruct(ObjCTypes.ProtocolExtensionTy); |
3195 | 6 | values.addInt(ObjCTypes.IntTy, size); |
3196 | 6 | values.add(optInstanceMethods); |
3197 | 6 | values.add(optClassMethods); |
3198 | 6 | values.add(instanceProperties); |
3199 | 6 | values.add(extendedMethodTypes); |
3200 | 6 | values.add(classProperties); |
3201 | | |
3202 | | // No special section, but goes in llvm.used |
3203 | 6 | return CreateMetadataVar("_OBJC_PROTOCOLEXT_" + PD->getName(), values, |
3204 | 6 | StringRef(), CGM.getPointerAlign(), true); |
3205 | 6 | } |
3206 | | |
3207 | | /* |
3208 | | struct objc_protocol_list { |
3209 | | struct objc_protocol_list *next; |
3210 | | long count; |
3211 | | Protocol *list[]; |
3212 | | }; |
3213 | | */ |
3214 | | llvm::Constant * |
3215 | | CGObjCMac::EmitProtocolList(Twine name, |
3216 | | ObjCProtocolDecl::protocol_iterator begin, |
3217 | 143 | ObjCProtocolDecl::protocol_iterator end) { |
3218 | | // Just return null for empty protocol lists |
3219 | 143 | auto PDs = GetRuntimeProtocolList(begin, end); |
3220 | 143 | if (PDs.empty()) |
3221 | 132 | return llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy); |
3222 | | |
3223 | 11 | ConstantInitBuilder builder(CGM); |
3224 | 11 | auto values = builder.beginStruct(); |
3225 | | |
3226 | | // This field is only used by the runtime. |
3227 | 11 | values.addNullPointer(ObjCTypes.ProtocolListPtrTy); |
3228 | | |
3229 | | // Reserve a slot for the count. |
3230 | 11 | auto countSlot = values.addPlaceholder(); |
3231 | | |
3232 | 11 | auto refsArray = values.beginArray(ObjCTypes.ProtocolPtrTy); |
3233 | 11 | for (const auto *Proto : PDs) |
3234 | 13 | refsArray.add(GetProtocolRef(Proto)); |
3235 | | |
3236 | 11 | auto count = refsArray.size(); |
3237 | | |
3238 | | // This list is null terminated. |
3239 | 11 | refsArray.addNullPointer(ObjCTypes.ProtocolPtrTy); |
3240 | | |
3241 | 11 | refsArray.finishAndAddTo(values); |
3242 | 11 | values.fillPlaceholderWithInt(countSlot, ObjCTypes.LongTy, count); |
3243 | | |
3244 | 11 | StringRef section; |
3245 | 11 | if (CGM.getTriple().isOSBinFormatMachO()) |
3246 | 11 | section = "__OBJC,__cat_cls_meth,regular,no_dead_strip"; |
3247 | | |
3248 | 11 | llvm::GlobalVariable *GV = |
3249 | 11 | CreateMetadataVar(name, values, section, CGM.getPointerAlign(), false); |
3250 | 11 | return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListPtrTy); |
3251 | 11 | } |
3252 | | |
3253 | | static void |
3254 | | PushProtocolProperties(llvm::SmallPtrSet<const IdentifierInfo*,16> &PropertySet, |
3255 | | SmallVectorImpl<const ObjCPropertyDecl *> &Properties, |
3256 | | const ObjCProtocolDecl *Proto, |
3257 | 100 | bool IsClassProperty) { |
3258 | 37 | for (const auto *PD : Proto->properties()) { |
3259 | 37 | if (IsClassProperty != PD->isClassProperty()) |
3260 | 7 | continue; |
3261 | 30 | if (!PropertySet.insert(PD->getIdentifier()).second) |
3262 | 7 | continue; |
3263 | 23 | Properties.push_back(PD); |
3264 | 23 | } |
3265 | | |
3266 | 100 | for (const auto *P : Proto->protocols()) |
3267 | 30 | PushProtocolProperties(PropertySet, Properties, P, IsClassProperty); |
3268 | 100 | } |
3269 | | |
3270 | | /* |
3271 | | struct _objc_property { |
3272 | | const char * const name; |
3273 | | const char * const attributes; |
3274 | | }; |
3275 | | |
3276 | | struct _objc_property_list { |
3277 | | uint32_t entsize; // sizeof (struct _objc_property) |
3278 | | uint32_t prop_count; |
3279 | | struct _objc_property[prop_count]; |
3280 | | }; |
3281 | | */ |
3282 | | llvm::Constant *CGObjCCommonMac::EmitPropertyList(Twine Name, |
3283 | | const Decl *Container, |
3284 | | const ObjCContainerDecl *OCD, |
3285 | | const ObjCCommonTypesHelper &ObjCTypes, |
3286 | 2.68k | bool IsClassProperty) { |
3287 | 2.68k | if (IsClassProperty) { |
3288 | | // Make this entry NULL for OS X with deployment target < 10.11, for iOS |
3289 | | // with deployment target < 9.0. |
3290 | 1.34k | const llvm::Triple &Triple = CGM.getTarget().getTriple(); |
3291 | 1.34k | if ((Triple.isMacOSX() && Triple.isMacOSXVersionLT(10, 11)1.27k ) || |
3292 | 786 | (Triple.isiOS() && Triple.isOSVersionLT(9)20 )) |
3293 | 571 | return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy); |
3294 | 2.10k | } |
3295 | | |
3296 | 2.10k | SmallVector<const ObjCPropertyDecl *, 16> Properties; |
3297 | 2.10k | llvm::SmallPtrSet<const IdentifierInfo*, 16> PropertySet; |
3298 | | |
3299 | 2.10k | if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(OCD)) |
3300 | 1.70k | for (const ObjCCategoryDecl *ClassExt : OID->known_extensions()) |
3301 | 68 | for (auto *PD : ClassExt->properties()) { |
3302 | 32 | if (IsClassProperty != PD->isClassProperty()) |
3303 | 6 | continue; |
3304 | 26 | if (PD->isDirectProperty()) |
3305 | 1 | continue; |
3306 | 25 | PropertySet.insert(PD->getIdentifier()); |
3307 | 25 | Properties.push_back(PD); |
3308 | 25 | } |
3309 | | |
3310 | 671 | for (const auto *PD : OCD->properties()) { |
3311 | 671 | if (IsClassProperty != PD->isClassProperty()) |
3312 | 230 | continue; |
3313 | | // Don't emit duplicate metadata for properties that were already in a |
3314 | | // class extension. |
3315 | 441 | if (!PropertySet.insert(PD->getIdentifier()).second) |
3316 | 7 | continue; |
3317 | 434 | if (PD->isDirectProperty()) |
3318 | 4 | continue; |
3319 | 430 | Properties.push_back(PD); |
3320 | 430 | } |
3321 | | |
3322 | 2.10k | if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(OCD)) { |
3323 | 1.70k | for (const auto *P : OID->all_referenced_protocols()) |
3324 | 64 | PushProtocolProperties(PropertySet, Properties, P, IsClassProperty); |
3325 | 1.70k | } |
3326 | 400 | else if (const ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(OCD)) { |
3327 | 311 | for (const auto *P : CD->protocols()) |
3328 | 6 | PushProtocolProperties(PropertySet, Properties, P, IsClassProperty); |
3329 | 311 | } |
3330 | | |
3331 | | // Return null for empty list. |
3332 | 2.10k | if (Properties.empty()) |
3333 | 1.82k | return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy); |
3334 | | |
3335 | 287 | unsigned propertySize = |
3336 | 287 | CGM.getDataLayout().getTypeAllocSize(ObjCTypes.PropertyTy); |
3337 | | |
3338 | 287 | ConstantInitBuilder builder(CGM); |
3339 | 287 | auto values = builder.beginStruct(); |
3340 | 287 | values.addInt(ObjCTypes.IntTy, propertySize); |
3341 | 287 | values.addInt(ObjCTypes.IntTy, Properties.size()); |
3342 | 287 | auto propertiesArray = values.beginArray(ObjCTypes.PropertyTy); |
3343 | 478 | for (auto PD : Properties) { |
3344 | 478 | auto property = propertiesArray.beginStruct(ObjCTypes.PropertyTy); |
3345 | 478 | property.add(GetPropertyName(PD->getIdentifier())); |
3346 | 478 | property.add(GetPropertyTypeString(PD, Container)); |
3347 | 478 | property.finishAndAddTo(propertiesArray); |
3348 | 478 | } |
3349 | 287 | propertiesArray.finishAndAddTo(values); |
3350 | | |
3351 | 287 | StringRef Section; |
3352 | 287 | if (CGM.getTriple().isOSBinFormatMachO()) |
3353 | 280 | Section = (ObjCABI == 2) ? "__DATA, __objc_const"265 |
3354 | 15 | : "__OBJC,__property,regular,no_dead_strip"; |
3355 | | |
3356 | 287 | llvm::GlobalVariable *GV = |
3357 | 287 | CreateMetadataVar(Name, values, Section, CGM.getPointerAlign(), true); |
3358 | 287 | return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.PropertyListPtrTy); |
3359 | 287 | } |
3360 | | |
3361 | | llvm::Constant * |
3362 | | CGObjCCommonMac::EmitProtocolMethodTypes(Twine Name, |
3363 | | ArrayRef<llvm::Constant*> MethodTypes, |
3364 | 75 | const ObjCCommonTypesHelper &ObjCTypes) { |
3365 | | // Return null for empty list. |
3366 | 75 | if (MethodTypes.empty()) |
3367 | 31 | return llvm::Constant::getNullValue(ObjCTypes.Int8PtrPtrTy); |
3368 | | |
3369 | 44 | llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.Int8PtrTy, |
3370 | 44 | MethodTypes.size()); |
3371 | 44 | llvm::Constant *Init = llvm::ConstantArray::get(AT, MethodTypes); |
3372 | | |
3373 | 44 | StringRef Section; |
3374 | 44 | if (CGM.getTriple().isOSBinFormatMachO() && ObjCABI == 242 ) |
3375 | 36 | Section = "__DATA, __objc_const"; |
3376 | | |
3377 | 44 | llvm::GlobalVariable *GV = |
3378 | 44 | CreateMetadataVar(Name, Init, Section, CGM.getPointerAlign(), true); |
3379 | 44 | return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.Int8PtrPtrTy); |
3380 | 44 | } |
3381 | | |
3382 | | /* |
3383 | | struct _objc_category { |
3384 | | char *category_name; |
3385 | | char *class_name; |
3386 | | struct _objc_method_list *instance_methods; |
3387 | | struct _objc_method_list *class_methods; |
3388 | | struct _objc_protocol_list *protocols; |
3389 | | uint32_t size; // <rdar://4585769> |
3390 | | struct _objc_property_list *instance_properties; |
3391 | | struct _objc_property_list *class_properties; |
3392 | | }; |
3393 | | */ |
3394 | 7 | void CGObjCMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) { |
3395 | 7 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.CategoryTy); |
3396 | | |
3397 | | // FIXME: This is poor design, the OCD should have a pointer to the category |
3398 | | // decl. Additionally, note that Category can be null for the @implementation |
3399 | | // w/o an @interface case. Sema should just create one for us as it does for |
3400 | | // @implementation so everyone else can live life under a clear blue sky. |
3401 | 7 | const ObjCInterfaceDecl *Interface = OCD->getClassInterface(); |
3402 | 7 | const ObjCCategoryDecl *Category = |
3403 | 7 | Interface->FindCategoryDeclaration(OCD->getIdentifier()); |
3404 | | |
3405 | 7 | SmallString<256> ExtName; |
3406 | 7 | llvm::raw_svector_ostream(ExtName) << Interface->getName() << '_' |
3407 | 7 | << OCD->getName(); |
3408 | | |
3409 | 7 | ConstantInitBuilder Builder(CGM); |
3410 | 7 | auto Values = Builder.beginStruct(ObjCTypes.CategoryTy); |
3411 | | |
3412 | 7 | enum { |
3413 | 7 | InstanceMethods, |
3414 | 7 | ClassMethods, |
3415 | 7 | NumMethodLists |
3416 | 7 | }; |
3417 | 7 | SmallVector<const ObjCMethodDecl *, 16> Methods[NumMethodLists]; |
3418 | 6 | for (const auto *MD : OCD->methods()) { |
3419 | 6 | if (!MD->isDirectMethod()) |
3420 | 6 | Methods[unsigned(MD->isClassMethod())].push_back(MD); |
3421 | 6 | } |
3422 | | |
3423 | 7 | Values.add(GetClassName(OCD->getName())); |
3424 | 7 | Values.add(GetClassName(Interface->getObjCRuntimeNameAsString())); |
3425 | 7 | LazySymbols.insert(Interface->getIdentifier()); |
3426 | | |
3427 | 7 | Values.add(emitMethodList(ExtName, MethodListType::CategoryInstanceMethods, |
3428 | 7 | Methods[InstanceMethods])); |
3429 | 7 | Values.add(emitMethodList(ExtName, MethodListType::CategoryClassMethods, |
3430 | 7 | Methods[ClassMethods])); |
3431 | 7 | if (Category) { |
3432 | 7 | Values.add( |
3433 | 7 | EmitProtocolList("OBJC_CATEGORY_PROTOCOLS_" + ExtName.str(), |
3434 | 7 | Category->protocol_begin(), Category->protocol_end())); |
3435 | 0 | } else { |
3436 | 0 | Values.addNullPointer(ObjCTypes.ProtocolListPtrTy); |
3437 | 0 | } |
3438 | 7 | Values.addInt(ObjCTypes.IntTy, Size); |
3439 | | |
3440 | | // If there is no category @interface then there can be no properties. |
3441 | 7 | if (Category) { |
3442 | 7 | Values.add(EmitPropertyList("_OBJC_$_PROP_LIST_" + ExtName.str(), |
3443 | 7 | OCD, Category, ObjCTypes, false)); |
3444 | 7 | Values.add(EmitPropertyList("_OBJC_$_CLASS_PROP_LIST_" + ExtName.str(), |
3445 | 7 | OCD, Category, ObjCTypes, true)); |
3446 | 0 | } else { |
3447 | 0 | Values.addNullPointer(ObjCTypes.PropertyListPtrTy); |
3448 | 0 | Values.addNullPointer(ObjCTypes.PropertyListPtrTy); |
3449 | 0 | } |
3450 | | |
3451 | 7 | llvm::GlobalVariable *GV = |
3452 | 7 | CreateMetadataVar("OBJC_CATEGORY_" + ExtName.str(), Values, |
3453 | 7 | "__OBJC,__category,regular,no_dead_strip", |
3454 | 7 | CGM.getPointerAlign(), true); |
3455 | 7 | DefinedCategories.push_back(GV); |
3456 | 7 | DefinedCategoryNames.insert(llvm::CachedHashString(ExtName)); |
3457 | | // method definition entries must be clear for next implementation. |
3458 | 7 | MethodDefinitions.clear(); |
3459 | 7 | } |
3460 | | |
3461 | | enum FragileClassFlags { |
3462 | | /// Apparently: is not a meta-class. |
3463 | | FragileABI_Class_Factory = 0x00001, |
3464 | | |
3465 | | /// Is a meta-class. |
3466 | | FragileABI_Class_Meta = 0x00002, |
3467 | | |
3468 | | /// Has a non-trivial constructor or destructor. |
3469 | | FragileABI_Class_HasCXXStructors = 0x02000, |
3470 | | |
3471 | | /// Has hidden visibility. |
3472 | | FragileABI_Class_Hidden = 0x20000, |
3473 | | |
3474 | | /// Class implementation was compiled under ARC. |
3475 | | FragileABI_Class_CompiledByARC = 0x04000000, |
3476 | | |
3477 | | /// Class implementation was compiled under MRC and has MRC weak ivars. |
3478 | | /// Exclusive with CompiledByARC. |
3479 | | FragileABI_Class_HasMRCWeakIvars = 0x08000000, |
3480 | | }; |
3481 | | |
3482 | | enum NonFragileClassFlags { |
3483 | | /// Is a meta-class. |
3484 | | NonFragileABI_Class_Meta = 0x00001, |
3485 | | |
3486 | | /// Is a root class. |
3487 | | NonFragileABI_Class_Root = 0x00002, |
3488 | | |
3489 | | /// Has a non-trivial constructor or destructor. |
3490 | | NonFragileABI_Class_HasCXXStructors = 0x00004, |
3491 | | |
3492 | | /// Has hidden visibility. |
3493 | | NonFragileABI_Class_Hidden = 0x00010, |
3494 | | |
3495 | | /// Has the exception attribute. |
3496 | | NonFragileABI_Class_Exception = 0x00020, |
3497 | | |
3498 | | /// (Obsolete) ARC-specific: this class has a .release_ivars method |
3499 | | NonFragileABI_Class_HasIvarReleaser = 0x00040, |
3500 | | |
3501 | | /// Class implementation was compiled under ARC. |
3502 | | NonFragileABI_Class_CompiledByARC = 0x00080, |
3503 | | |
3504 | | /// Class has non-trivial destructors, but zero-initialization is okay. |
3505 | | NonFragileABI_Class_HasCXXDestructorOnly = 0x00100, |
3506 | | |
3507 | | /// Class implementation was compiled under MRC and has MRC weak ivars. |
3508 | | /// Exclusive with CompiledByARC. |
3509 | | NonFragileABI_Class_HasMRCWeakIvars = 0x00200, |
3510 | | }; |
3511 | | |
3512 | 17 | static bool hasWeakMember(QualType type) { |
3513 | 17 | if (type.getObjCLifetime() == Qualifiers::OCL_Weak) { |
3514 | 11 | return true; |
3515 | 11 | } |
3516 | | |
3517 | 6 | if (auto recType = type->getAs<RecordType>()) { |
3518 | 0 | for (auto field : recType->getDecl()->fields()) { |
3519 | 0 | if (hasWeakMember(field->getType())) |
3520 | 0 | return true; |
3521 | 0 | } |
3522 | 0 | } |
3523 | | |
3524 | 6 | return false; |
3525 | 6 | } |
3526 | | |
3527 | | /// For compatibility, we only want to set the "HasMRCWeakIvars" flag |
3528 | | /// (and actually fill in a layout string) if we really do have any |
3529 | | /// __weak ivars. |
3530 | | static bool hasMRCWeakIvars(CodeGenModule &CGM, |
3531 | 1.77k | const ObjCImplementationDecl *ID) { |
3532 | 1.77k | if (!CGM.getLangOpts().ObjCWeak) return false1.76k ; |
3533 | 13 | assert(CGM.getLangOpts().getGC() == LangOptions::NonGC); |
3534 | | |
3535 | 13 | for (const ObjCIvarDecl *ivar = |
3536 | 13 | ID->getClassInterface()->all_declared_ivar_begin(); |
3537 | 19 | ivar; ivar = ivar->getNextIvar()6 ) { |
3538 | 17 | if (hasWeakMember(ivar->getType())) |
3539 | 11 | return true; |
3540 | 17 | } |
3541 | | |
3542 | 2 | return false; |
3543 | 13 | } |
3544 | | |
3545 | | /* |
3546 | | struct _objc_class { |
3547 | | Class isa; |
3548 | | Class super_class; |
3549 | | const char *name; |
3550 | | long version; |
3551 | | long info; |
3552 | | long instance_size; |
3553 | | struct _objc_ivar_list *ivars; |
3554 | | struct _objc_method_list *methods; |
3555 | | struct _objc_cache *cache; |
3556 | | struct _objc_protocol_list *protocols; |
3557 | | // Objective-C 1.0 extensions (<rdr://4585769>) |
3558 | | const char *ivar_layout; |
3559 | | struct _objc_class_ext *ext; |
3560 | | }; |
3561 | | |
3562 | | See EmitClassExtension(); |
3563 | | */ |
3564 | 121 | void CGObjCMac::GenerateClass(const ObjCImplementationDecl *ID) { |
3565 | 121 | IdentifierInfo *RuntimeName = |
3566 | 121 | &CGM.getContext().Idents.get(ID->getObjCRuntimeNameAsString()); |
3567 | 121 | DefinedSymbols.insert(RuntimeName); |
3568 | | |
3569 | 121 | std::string ClassName = ID->getNameAsString(); |
3570 | | // FIXME: Gross |
3571 | 121 | ObjCInterfaceDecl *Interface = |
3572 | 121 | const_cast<ObjCInterfaceDecl*>(ID->getClassInterface()); |
3573 | 121 | llvm::Constant *Protocols = |
3574 | 121 | EmitProtocolList("OBJC_CLASS_PROTOCOLS_" + ID->getName(), |
3575 | 121 | Interface->all_referenced_protocol_begin(), |
3576 | 121 | Interface->all_referenced_protocol_end()); |
3577 | 121 | unsigned Flags = FragileABI_Class_Factory; |
3578 | 121 | if (ID->hasNonZeroConstructors() || ID->hasDestructors()120 ) |
3579 | 8 | Flags |= FragileABI_Class_HasCXXStructors; |
3580 | | |
3581 | 121 | bool hasMRCWeak = false; |
3582 | | |
3583 | 121 | if (CGM.getLangOpts().ObjCAutoRefCount) |
3584 | 4 | Flags |= FragileABI_Class_CompiledByARC; |
3585 | 117 | else if ((hasMRCWeak = hasMRCWeakIvars(CGM, ID))) |
3586 | 3 | Flags |= FragileABI_Class_HasMRCWeakIvars; |
3587 | | |
3588 | 121 | CharUnits Size = |
3589 | 121 | CGM.getContext().getASTObjCImplementationLayout(ID).getSize(); |
3590 | | |
3591 | | // FIXME: Set CXX-structors flag. |
3592 | 121 | if (ID->getClassInterface()->getVisibility() == HiddenVisibility) |
3593 | 0 | Flags |= FragileABI_Class_Hidden; |
3594 | | |
3595 | 121 | enum { |
3596 | 121 | InstanceMethods, |
3597 | 121 | ClassMethods, |
3598 | 121 | NumMethodLists |
3599 | 121 | }; |
3600 | 121 | SmallVector<const ObjCMethodDecl *, 16> Methods[NumMethodLists]; |
3601 | 170 | for (const auto *MD : ID->methods()) { |
3602 | 170 | if (!MD->isDirectMethod()) |
3603 | 170 | Methods[unsigned(MD->isClassMethod())].push_back(MD); |
3604 | 170 | } |
3605 | | |
3606 | 17 | for (const auto *PID : ID->property_impls()) { |
3607 | 17 | if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) { |
3608 | 13 | if (PID->getPropertyDecl()->isDirectProperty()) |
3609 | 0 | continue; |
3610 | 13 | if (ObjCMethodDecl *MD = PID->getGetterMethodDecl()) |
3611 | 13 | if (GetMethodDefinition(MD)) |
3612 | 13 | Methods[InstanceMethods].push_back(MD); |
3613 | 13 | if (ObjCMethodDecl *MD = PID->getSetterMethodDecl()) |
3614 | 13 | if (GetMethodDefinition(MD)) |
3615 | 13 | Methods[InstanceMethods].push_back(MD); |
3616 | 13 | } |
3617 | 17 | } |
3618 | | |
3619 | 121 | ConstantInitBuilder builder(CGM); |
3620 | 121 | auto values = builder.beginStruct(ObjCTypes.ClassTy); |
3621 | 121 | values.add(EmitMetaClass(ID, Protocols, Methods[ClassMethods])); |
3622 | 121 | if (ObjCInterfaceDecl *Super = Interface->getSuperClass()) { |
3623 | | // Record a reference to the super class. |
3624 | 39 | LazySymbols.insert(Super->getIdentifier()); |
3625 | | |
3626 | 39 | values.addBitCast(GetClassName(Super->getObjCRuntimeNameAsString()), |
3627 | 39 | ObjCTypes.ClassPtrTy); |
3628 | 82 | } else { |
3629 | 82 | values.addNullPointer(ObjCTypes.ClassPtrTy); |
3630 | 82 | } |
3631 | 121 | values.add(GetClassName(ID->getObjCRuntimeNameAsString())); |
3632 | | // Version is always 0. |
3633 | 121 | values.addInt(ObjCTypes.LongTy, 0); |
3634 | 121 | values.addInt(ObjCTypes.LongTy, Flags); |
3635 | 121 | values.addInt(ObjCTypes.LongTy, Size.getQuantity()); |
3636 | 121 | values.add(EmitIvarList(ID, false)); |
3637 | 121 | values.add(emitMethodList(ID->getName(), MethodListType::InstanceMethods, |
3638 | 121 | Methods[InstanceMethods])); |
3639 | | // cache is always NULL. |
3640 | 121 | values.addNullPointer(ObjCTypes.CachePtrTy); |
3641 | 121 | values.add(Protocols); |
3642 | 121 | values.add(BuildStrongIvarLayout(ID, CharUnits::Zero(), Size)); |
3643 | 121 | values.add(EmitClassExtension(ID, Size, hasMRCWeak, |
3644 | 121 | /*isMetaclass*/ false)); |
3645 | | |
3646 | 121 | std::string Name("OBJC_CLASS_"); |
3647 | 121 | Name += ClassName; |
3648 | 121 | const char *Section = "__OBJC,__class,regular,no_dead_strip"; |
3649 | | // Check for a forward reference. |
3650 | 121 | llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true); |
3651 | 121 | if (GV) { |
3652 | 8 | assert(GV->getValueType() == ObjCTypes.ClassTy && |
3653 | 8 | "Forward metaclass reference has incorrect type."); |
3654 | 8 | values.finishAndSetAsInitializer(GV); |
3655 | 8 | GV->setSection(Section); |
3656 | 8 | GV->setAlignment(CGM.getPointerAlign().getAsAlign()); |
3657 | 8 | CGM.addCompilerUsedGlobal(GV); |
3658 | 8 | } else |
3659 | 113 | GV = CreateMetadataVar(Name, values, Section, CGM.getPointerAlign(), true); |
3660 | 121 | DefinedClasses.push_back(GV); |
3661 | 121 | ImplementedClasses.push_back(Interface); |
3662 | | // method definition entries must be clear for next implementation. |
3663 | 121 | MethodDefinitions.clear(); |
3664 | 121 | } |
3665 | | |
3666 | | llvm::Constant *CGObjCMac::EmitMetaClass(const ObjCImplementationDecl *ID, |
3667 | | llvm::Constant *Protocols, |
3668 | 121 | ArrayRef<const ObjCMethodDecl*> Methods) { |
3669 | 121 | unsigned Flags = FragileABI_Class_Meta; |
3670 | 121 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ClassTy); |
3671 | | |
3672 | 121 | if (ID->getClassInterface()->getVisibility() == HiddenVisibility) |
3673 | 0 | Flags |= FragileABI_Class_Hidden; |
3674 | | |
3675 | 121 | ConstantInitBuilder builder(CGM); |
3676 | 121 | auto values = builder.beginStruct(ObjCTypes.ClassTy); |
3677 | | // The isa for the metaclass is the root of the hierarchy. |
3678 | 121 | const ObjCInterfaceDecl *Root = ID->getClassInterface(); |
3679 | 169 | while (const ObjCInterfaceDecl *Super = Root->getSuperClass()) |
3680 | 48 | Root = Super; |
3681 | 121 | values.addBitCast(GetClassName(Root->getObjCRuntimeNameAsString()), |
3682 | 121 | ObjCTypes.ClassPtrTy); |
3683 | | // The super class for the metaclass is emitted as the name of the |
3684 | | // super class. The runtime fixes this up to point to the |
3685 | | // *metaclass* for the super class. |
3686 | 121 | if (ObjCInterfaceDecl *Super = ID->getClassInterface()->getSuperClass()) { |
3687 | 39 | values.addBitCast(GetClassName(Super->getObjCRuntimeNameAsString()), |
3688 | 39 | ObjCTypes.ClassPtrTy); |
3689 | 82 | } else { |
3690 | 82 | values.addNullPointer(ObjCTypes.ClassPtrTy); |
3691 | 82 | } |
3692 | 121 | values.add(GetClassName(ID->getObjCRuntimeNameAsString())); |
3693 | | // Version is always 0. |
3694 | 121 | values.addInt(ObjCTypes.LongTy, 0); |
3695 | 121 | values.addInt(ObjCTypes.LongTy, Flags); |
3696 | 121 | values.addInt(ObjCTypes.LongTy, Size); |
3697 | 121 | values.add(EmitIvarList(ID, true)); |
3698 | 121 | values.add(emitMethodList(ID->getName(), MethodListType::ClassMethods, |
3699 | 121 | Methods)); |
3700 | | // cache is always NULL. |
3701 | 121 | values.addNullPointer(ObjCTypes.CachePtrTy); |
3702 | 121 | values.add(Protocols); |
3703 | | // ivar_layout for metaclass is always NULL. |
3704 | 121 | values.addNullPointer(ObjCTypes.Int8PtrTy); |
3705 | | // The class extension is used to store class properties for metaclasses. |
3706 | 121 | values.add(EmitClassExtension(ID, CharUnits::Zero(), false/*hasMRCWeak*/, |
3707 | 121 | /*isMetaclass*/true)); |
3708 | | |
3709 | 121 | std::string Name("OBJC_METACLASS_"); |
3710 | 121 | Name += ID->getName(); |
3711 | | |
3712 | | // Check for a forward reference. |
3713 | 121 | llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true); |
3714 | 121 | if (GV) { |
3715 | 2 | assert(GV->getValueType() == ObjCTypes.ClassTy && |
3716 | 2 | "Forward metaclass reference has incorrect type."); |
3717 | 2 | values.finishAndSetAsInitializer(GV); |
3718 | 119 | } else { |
3719 | 119 | GV = values.finishAndCreateGlobal(Name, CGM.getPointerAlign(), |
3720 | 119 | /*constant*/ false, |
3721 | 119 | llvm::GlobalValue::PrivateLinkage); |
3722 | 119 | } |
3723 | 121 | GV->setSection("__OBJC,__meta_class,regular,no_dead_strip"); |
3724 | 121 | CGM.addCompilerUsedGlobal(GV); |
3725 | | |
3726 | 121 | return GV; |
3727 | 121 | } |
3728 | | |
3729 | 7 | llvm::Constant *CGObjCMac::EmitMetaClassRef(const ObjCInterfaceDecl *ID) { |
3730 | 7 | std::string Name = "OBJC_METACLASS_" + ID->getNameAsString(); |
3731 | | |
3732 | | // FIXME: Should we look these up somewhere other than the module. Its a bit |
3733 | | // silly since we only generate these while processing an implementation, so |
3734 | | // exactly one pointer would work if know when we entered/exitted an |
3735 | | // implementation block. |
3736 | | |
3737 | | // Check for an existing forward reference. |
3738 | | // Previously, metaclass with internal linkage may have been defined. |
3739 | | // pass 'true' as 2nd argument so it is returned. |
3740 | 7 | llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true); |
3741 | 7 | if (!GV) |
3742 | 2 | GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false, |
3743 | 2 | llvm::GlobalValue::PrivateLinkage, nullptr, |
3744 | 2 | Name); |
3745 | | |
3746 | 7 | assert(GV->getValueType() == ObjCTypes.ClassTy && |
3747 | 7 | "Forward metaclass reference has incorrect type."); |
3748 | 7 | return GV; |
3749 | 7 | } |
3750 | | |
3751 | 16 | llvm::Value *CGObjCMac::EmitSuperClassRef(const ObjCInterfaceDecl *ID) { |
3752 | 16 | std::string Name = "OBJC_CLASS_" + ID->getNameAsString(); |
3753 | 16 | llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true); |
3754 | | |
3755 | 16 | if (!GV) |
3756 | 8 | GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false, |
3757 | 8 | llvm::GlobalValue::PrivateLinkage, nullptr, |
3758 | 8 | Name); |
3759 | | |
3760 | 16 | assert(GV->getValueType() == ObjCTypes.ClassTy && |
3761 | 16 | "Forward class metadata reference has incorrect type."); |
3762 | 16 | return GV; |
3763 | 16 | } |
3764 | | |
3765 | | /* |
3766 | | Emit a "class extension", which in this specific context means extra |
3767 | | data that doesn't fit in the normal fragile-ABI class structure, and |
3768 | | has nothing to do with the language concept of a class extension. |
3769 | | |
3770 | | struct objc_class_ext { |
3771 | | uint32_t size; |
3772 | | const char *weak_ivar_layout; |
3773 | | struct _objc_property_list *properties; |
3774 | | }; |
3775 | | */ |
3776 | | llvm::Constant * |
3777 | | CGObjCMac::EmitClassExtension(const ObjCImplementationDecl *ID, |
3778 | | CharUnits InstanceSize, bool hasMRCWeakIvars, |
3779 | 242 | bool isMetaclass) { |
3780 | | // Weak ivar layout. |
3781 | 242 | llvm::Constant *layout; |
3782 | 242 | if (isMetaclass) { |
3783 | 121 | layout = llvm::ConstantPointerNull::get(CGM.Int8PtrTy); |
3784 | 121 | } else { |
3785 | 121 | layout = BuildWeakIvarLayout(ID, CharUnits::Zero(), InstanceSize, |
3786 | 121 | hasMRCWeakIvars); |
3787 | 121 | } |
3788 | | |
3789 | | // Properties. |
3790 | 242 | llvm::Constant *propertyList = |
3791 | 121 | EmitPropertyList((isMetaclass ? Twine("_OBJC_$_CLASS_PROP_LIST_") |
3792 | 121 | : Twine("_OBJC_$_PROP_LIST_")) |
3793 | 242 | + ID->getName(), |
3794 | 242 | ID, ID->getClassInterface(), ObjCTypes, isMetaclass); |
3795 | | |
3796 | | // Return null if no extension bits are used. |
3797 | 242 | if (layout->isNullValue() && propertyList->isNullValue()227 ) { |
3798 | 212 | return llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy); |
3799 | 212 | } |
3800 | | |
3801 | 30 | uint64_t size = |
3802 | 30 | CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ClassExtensionTy); |
3803 | | |
3804 | 30 | ConstantInitBuilder builder(CGM); |
3805 | 30 | auto values = builder.beginStruct(ObjCTypes.ClassExtensionTy); |
3806 | 30 | values.addInt(ObjCTypes.IntTy, size); |
3807 | 30 | values.add(layout); |
3808 | 30 | values.add(propertyList); |
3809 | | |
3810 | 30 | return CreateMetadataVar("OBJC_CLASSEXT_" + ID->getName(), values, |
3811 | 30 | "__OBJC,__class_ext,regular,no_dead_strip", |
3812 | 30 | CGM.getPointerAlign(), true); |
3813 | 30 | } |
3814 | | |
3815 | | /* |
3816 | | struct objc_ivar { |
3817 | | char *ivar_name; |
3818 | | char *ivar_type; |
3819 | | int ivar_offset; |
3820 | | }; |
3821 | | |
3822 | | struct objc_ivar_list { |
3823 | | int ivar_count; |
3824 | | struct objc_ivar list[count]; |
3825 | | }; |
3826 | | */ |
3827 | | llvm::Constant *CGObjCMac::EmitIvarList(const ObjCImplementationDecl *ID, |
3828 | 242 | bool ForClass) { |
3829 | | // When emitting the root class GCC emits ivar entries for the |
3830 | | // actual class structure. It is not clear if we need to follow this |
3831 | | // behavior; for now lets try and get away with not doing it. If so, |
3832 | | // the cleanest solution would be to make up an ObjCInterfaceDecl |
3833 | | // for the class. |
3834 | 242 | if (ForClass) |
3835 | 121 | return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy); |
3836 | | |
3837 | 121 | const ObjCInterfaceDecl *OID = ID->getClassInterface(); |
3838 | | |
3839 | 121 | ConstantInitBuilder builder(CGM); |
3840 | 121 | auto ivarList = builder.beginStruct(); |
3841 | 121 | auto countSlot = ivarList.addPlaceholder(); |
3842 | 121 | auto ivars = ivarList.beginArray(ObjCTypes.IvarTy); |
3843 | | |
3844 | 121 | for (const ObjCIvarDecl *IVD = OID->all_declared_ivar_begin(); |
3845 | 299 | IVD; IVD = IVD->getNextIvar()178 ) { |
3846 | | // Ignore unnamed bit-fields. |
3847 | 178 | if (!IVD->getDeclName()) |
3848 | 0 | continue; |
3849 | | |
3850 | 178 | auto ivar = ivars.beginStruct(ObjCTypes.IvarTy); |
3851 | 178 | ivar.add(GetMethodVarName(IVD->getIdentifier())); |
3852 | 178 | ivar.add(GetMethodVarType(IVD)); |
3853 | 178 | ivar.addInt(ObjCTypes.IntTy, ComputeIvarBaseOffset(CGM, OID, IVD)); |
3854 | 178 | ivar.finishAndAddTo(ivars); |
3855 | 178 | } |
3856 | | |
3857 | | // Return null for empty list. |
3858 | 121 | auto count = ivars.size(); |
3859 | 121 | if (count == 0) { |
3860 | 54 | ivars.abandon(); |
3861 | 54 | ivarList.abandon(); |
3862 | 54 | return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy); |
3863 | 54 | } |
3864 | | |
3865 | 67 | ivars.finishAndAddTo(ivarList); |
3866 | 67 | ivarList.fillPlaceholderWithInt(countSlot, ObjCTypes.IntTy, count); |
3867 | | |
3868 | 67 | llvm::GlobalVariable *GV; |
3869 | 67 | if (ForClass) |
3870 | 0 | GV = |
3871 | 0 | CreateMetadataVar("OBJC_CLASS_VARIABLES_" + ID->getName(), ivarList, |
3872 | 0 | "__OBJC,__class_vars,regular,no_dead_strip", |
3873 | 0 | CGM.getPointerAlign(), true); |
3874 | 67 | else |
3875 | 67 | GV = CreateMetadataVar("OBJC_INSTANCE_VARIABLES_" + ID->getName(), ivarList, |
3876 | 67 | "__OBJC,__instance_vars,regular,no_dead_strip", |
3877 | 67 | CGM.getPointerAlign(), true); |
3878 | 67 | return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListPtrTy); |
3879 | 67 | } |
3880 | | |
3881 | | /// Build a struct objc_method_description constant for the given method. |
3882 | | /// |
3883 | | /// struct objc_method_description { |
3884 | | /// SEL method_name; |
3885 | | /// char *method_types; |
3886 | | /// }; |
3887 | | void CGObjCMac::emitMethodDescriptionConstant(ConstantArrayBuilder &builder, |
3888 | 7 | const ObjCMethodDecl *MD) { |
3889 | 7 | auto description = builder.beginStruct(ObjCTypes.MethodDescriptionTy); |
3890 | 7 | description.addBitCast(GetMethodVarName(MD->getSelector()), |
3891 | 7 | ObjCTypes.SelectorPtrTy); |
3892 | 7 | description.add(GetMethodVarType(MD)); |
3893 | 7 | description.finishAndAddTo(builder); |
3894 | 7 | } |
3895 | | |
3896 | | /// Build a struct objc_method constant for the given method. |
3897 | | /// |
3898 | | /// struct objc_method { |
3899 | | /// SEL method_name; |
3900 | | /// char *method_types; |
3901 | | /// void *method; |
3902 | | /// }; |
3903 | | void CGObjCMac::emitMethodConstant(ConstantArrayBuilder &builder, |
3904 | 202 | const ObjCMethodDecl *MD) { |
3905 | 202 | llvm::Function *fn = GetMethodDefinition(MD); |
3906 | 202 | assert(fn && "no definition registered for method"); |
3907 | | |
3908 | 202 | auto method = builder.beginStruct(ObjCTypes.MethodTy); |
3909 | 202 | method.addBitCast(GetMethodVarName(MD->getSelector()), |
3910 | 202 | ObjCTypes.SelectorPtrTy); |
3911 | 202 | method.add(GetMethodVarType(MD)); |
3912 | 202 | method.addBitCast(fn, ObjCTypes.Int8PtrTy); |
3913 | 202 | method.finishAndAddTo(builder); |
3914 | 202 | } |
3915 | | |
3916 | | /// Build a struct objc_method_list or struct objc_method_description_list, |
3917 | | /// as appropriate. |
3918 | | /// |
3919 | | /// struct objc_method_list { |
3920 | | /// struct objc_method_list *obsolete; |
3921 | | /// int count; |
3922 | | /// struct objc_method methods_list[count]; |
3923 | | /// }; |
3924 | | /// |
3925 | | /// struct objc_method_description_list { |
3926 | | /// int count; |
3927 | | /// struct objc_method_description list[count]; |
3928 | | /// }; |
3929 | | llvm::Constant *CGObjCMac::emitMethodList(Twine name, MethodListType MLT, |
3930 | 316 | ArrayRef<const ObjCMethodDecl *> methods) { |
3931 | 316 | StringRef prefix; |
3932 | 316 | StringRef section; |
3933 | 316 | bool forProtocol = false; |
3934 | 316 | switch (MLT) { |
3935 | 7 | case MethodListType::CategoryInstanceMethods: |
3936 | 7 | prefix = "OBJC_CATEGORY_INSTANCE_METHODS_"; |
3937 | 7 | section = "__OBJC,__cat_inst_meth,regular,no_dead_strip"; |
3938 | 7 | forProtocol = false; |
3939 | 7 | break; |
3940 | 7 | case MethodListType::CategoryClassMethods: |
3941 | 7 | prefix = "OBJC_CATEGORY_CLASS_METHODS_"; |
3942 | 7 | section = "__OBJC,__cat_cls_meth,regular,no_dead_strip"; |
3943 | 7 | forProtocol = false; |
3944 | 7 | break; |
3945 | 121 | case MethodListType::InstanceMethods: |
3946 | 121 | prefix = "OBJC_INSTANCE_METHODS_"; |
3947 | 121 | section = "__OBJC,__inst_meth,regular,no_dead_strip"; |
3948 | 121 | forProtocol = false; |
3949 | 121 | break; |
3950 | 121 | case MethodListType::ClassMethods: |
3951 | 121 | prefix = "OBJC_CLASS_METHODS_"; |
3952 | 121 | section = "__OBJC,__cls_meth,regular,no_dead_strip"; |
3953 | 121 | forProtocol = false; |
3954 | 121 | break; |
3955 | 15 | case MethodListType::ProtocolInstanceMethods: |
3956 | 15 | prefix = "OBJC_PROTOCOL_INSTANCE_METHODS_"; |
3957 | 15 | section = "__OBJC,__cat_inst_meth,regular,no_dead_strip"; |
3958 | 15 | forProtocol = true; |
3959 | 15 | break; |
3960 | 15 | case MethodListType::ProtocolClassMethods: |
3961 | 15 | prefix = "OBJC_PROTOCOL_CLASS_METHODS_"; |
3962 | 15 | section = "__OBJC,__cat_cls_meth,regular,no_dead_strip"; |
3963 | 15 | forProtocol = true; |
3964 | 15 | break; |
3965 | 15 | case MethodListType::OptionalProtocolInstanceMethods: |
3966 | 15 | prefix = "OBJC_PROTOCOL_INSTANCE_METHODS_OPT_"; |
3967 | 15 | section = "__OBJC,__cat_inst_meth,regular,no_dead_strip"; |
3968 | 15 | forProtocol = true; |
3969 | 15 | break; |
3970 | 15 | case MethodListType::OptionalProtocolClassMethods: |
3971 | 15 | prefix = "OBJC_PROTOCOL_CLASS_METHODS_OPT_"; |
3972 | 15 | section = "__OBJC,__cat_cls_meth,regular,no_dead_strip"; |
3973 | 15 | forProtocol = true; |
3974 | 15 | break; |
3975 | 316 | } |
3976 | | |
3977 | | // Return null for empty list. |
3978 | 316 | if (methods.empty()) |
3979 | 212 | return llvm::Constant::getNullValue(forProtocol |
3980 | 53 | ? ObjCTypes.MethodDescriptionListPtrTy |
3981 | 159 | : ObjCTypes.MethodListPtrTy); |
3982 | | |
3983 | | // For protocols, this is an objc_method_description_list, which has |
3984 | | // a slightly different structure. |
3985 | 104 | if (forProtocol) { |
3986 | 7 | ConstantInitBuilder builder(CGM); |
3987 | 7 | auto values = builder.beginStruct(); |
3988 | 7 | values.addInt(ObjCTypes.IntTy, methods.size()); |
3989 | 7 | auto methodArray = values.beginArray(ObjCTypes.MethodDescriptionTy); |
3990 | 7 | for (auto MD : methods) { |
3991 | 7 | emitMethodDescriptionConstant(methodArray, MD); |
3992 | 7 | } |
3993 | 7 | methodArray.finishAndAddTo(values); |
3994 | | |
3995 | 7 | llvm::GlobalVariable *GV = CreateMetadataVar(prefix + name, values, section, |
3996 | 7 | CGM.getPointerAlign(), true); |
3997 | 7 | return llvm::ConstantExpr::getBitCast(GV, |
3998 | 7 | ObjCTypes.MethodDescriptionListPtrTy); |
3999 | 7 | } |
4000 | | |
4001 | | // Otherwise, it's an objc_method_list. |
4002 | 97 | ConstantInitBuilder builder(CGM); |
4003 | 97 | auto values = builder.beginStruct(); |
4004 | 97 | values.addNullPointer(ObjCTypes.Int8PtrTy); |
4005 | 97 | values.addInt(ObjCTypes.IntTy, methods.size()); |
4006 | 97 | auto methodArray = values.beginArray(ObjCTypes.MethodTy); |
4007 | 202 | for (auto MD : methods) { |
4008 | 202 | if (!MD->isDirectMethod()) |
4009 | 202 | emitMethodConstant(methodArray, MD); |
4010 | 202 | } |
4011 | 97 | methodArray.finishAndAddTo(values); |
4012 | | |
4013 | 97 | llvm::GlobalVariable *GV = CreateMetadataVar(prefix + name, values, section, |
4014 | 97 | CGM.getPointerAlign(), true); |
4015 | 97 | return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListPtrTy); |
4016 | 97 | } |
4017 | | |
4018 | | llvm::Function *CGObjCCommonMac::GenerateMethod(const ObjCMethodDecl *OMD, |
4019 | 2.52k | const ObjCContainerDecl *CD) { |
4020 | 2.52k | llvm::Function *Method; |
4021 | | |
4022 | 2.52k | if (OMD->isDirectMethod()) { |
4023 | 39 | Method = GenerateDirectMethod(OMD, CD); |
4024 | 2.48k | } else { |
4025 | 2.48k | auto Name = getSymbolNameForMethod(OMD); |
4026 | | |
4027 | 2.48k | CodeGenTypes &Types = CGM.getTypes(); |
4028 | 2.48k | llvm::FunctionType *MethodTy = |
4029 | 2.48k | Types.GetFunctionType(Types.arrangeObjCMethodDeclaration(OMD)); |
4030 | 2.48k | Method = |
4031 | 2.48k | llvm::Function::Create(MethodTy, llvm::GlobalValue::InternalLinkage, |
4032 | 2.48k | Name, &CGM.getModule()); |
4033 | 2.48k | } |
4034 | | |
4035 | 2.52k | MethodDefinitions.insert(std::make_pair(OMD, Method)); |
4036 | | |
4037 | 2.52k | return Method; |
4038 | 2.52k | } |
4039 | | |
4040 | | llvm::Function * |
4041 | | CGObjCCommonMac::GenerateDirectMethod(const ObjCMethodDecl *OMD, |
4042 | 106 | const ObjCContainerDecl *CD) { |
4043 | 106 | auto *COMD = OMD->getCanonicalDecl(); |
4044 | 106 | auto I = DirectMethodDefinitions.find(COMD); |
4045 | 106 | llvm::Function *OldFn = nullptr, *Fn = nullptr; |
4046 | | |
4047 | 106 | if (I != DirectMethodDefinitions.end()) { |
4048 | | // Objective-C allows for the declaration and implementation types |
4049 | | // to differ slightly. |
4050 | | // |
4051 | | // If we're being asked for the Function associated for a method |
4052 | | // implementation, a previous value might have been cached |
4053 | | // based on the type of the canonical declaration. |
4054 | | // |
4055 | | // If these do not match, then we'll replace this function with |
4056 | | // a new one that has the proper type below. |
4057 | 24 | if (!OMD->getBody() || COMD->getReturnType() == OMD->getReturnType()17 ) |
4058 | 23 | return I->second; |
4059 | 1 | OldFn = I->second; |
4060 | 1 | } |
4061 | | |
4062 | 83 | CodeGenTypes &Types = CGM.getTypes(); |
4063 | 83 | llvm::FunctionType *MethodTy = |
4064 | 83 | Types.GetFunctionType(Types.arrangeObjCMethodDeclaration(OMD)); |
4065 | | |
4066 | 83 | if (OldFn) { |
4067 | 1 | Fn = llvm::Function::Create(MethodTy, llvm::GlobalValue::ExternalLinkage, |
4068 | 1 | "", &CGM.getModule()); |
4069 | 1 | Fn->takeName(OldFn); |
4070 | 1 | OldFn->replaceAllUsesWith( |
4071 | 1 | llvm::ConstantExpr::getBitCast(Fn, OldFn->getType())); |
4072 | 1 | OldFn->eraseFromParent(); |
4073 | | |
4074 | | // Replace the cached function in the map. |
4075 | 1 | I->second = Fn; |
4076 | 82 | } else { |
4077 | 82 | auto Name = getSymbolNameForMethod(OMD, /*include category*/ false); |
4078 | | |
4079 | 82 | Fn = llvm::Function::Create(MethodTy, llvm::GlobalValue::ExternalLinkage, |
4080 | 82 | Name, &CGM.getModule()); |
4081 | 82 | DirectMethodDefinitions.insert(std::make_pair(COMD, Fn)); |
4082 | 82 | } |
4083 | | |
4084 | 83 | return Fn; |
4085 | 106 | } |
4086 | | |
4087 | | void CGObjCCommonMac::GenerateDirectMethodPrologue( |
4088 | | CodeGenFunction &CGF, llvm::Function *Fn, const ObjCMethodDecl *OMD, |
4089 | 39 | const ObjCContainerDecl *CD) { |
4090 | 39 | auto &Builder = CGF.Builder; |
4091 | 39 | bool ReceiverCanBeNull = true; |
4092 | 39 | auto selfAddr = CGF.GetAddrOfLocalVar(OMD->getSelfDecl()); |
4093 | 39 | auto selfValue = Builder.CreateLoad(selfAddr); |
4094 | | |
4095 | | // Generate: |
4096 | | // |
4097 | | // /* for class methods only to force class lazy initialization */ |
4098 | | // self = [self self]; |
4099 | | // |
4100 | | // /* unless the receiver is never NULL */ |
4101 | | // if (self == nil) { |
4102 | | // return (ReturnType){ }; |
4103 | | // } |
4104 | | // |
4105 | | // _cmd = @selector(...) |
4106 | | // ... |
4107 | | |
4108 | 39 | if (OMD->isClassMethod()) { |
4109 | 3 | const ObjCInterfaceDecl *OID = cast<ObjCInterfaceDecl>(CD); |
4110 | 3 | assert(OID && |
4111 | 3 | "GenerateDirectMethod() should be called with the Class Interface"); |
4112 | 3 | Selector SelfSel = GetNullarySelector("self", CGM.getContext()); |
4113 | 3 | auto ResultType = CGF.getContext().getObjCIdType(); |
4114 | 3 | RValue result; |
4115 | 3 | CallArgList Args; |
4116 | | |
4117 | | // TODO: If this method is inlined, the caller might know that `self` is |
4118 | | // already initialized; for example, it might be an ordinary Objective-C |
4119 | | // method which always receives an initialized `self`, or it might have just |
4120 | | // forced initialization on its own. |
4121 | | // |
4122 | | // We should find a way to eliminate this unnecessary initialization in such |
4123 | | // cases in LLVM. |
4124 | 3 | result = GeneratePossiblySpecializedMessageSend( |
4125 | 3 | CGF, ReturnValueSlot(), ResultType, SelfSel, selfValue, Args, OID, |
4126 | 3 | nullptr, true); |
4127 | 3 | Builder.CreateStore(result.getScalarVal(), selfAddr); |
4128 | | |
4129 | | // Nullable `Class` expressions cannot be messaged with a direct method |
4130 | | // so the only reason why the receive can be null would be because |
4131 | | // of weak linking. |
4132 | 3 | ReceiverCanBeNull = isWeakLinkedClass(OID); |
4133 | 3 | } |
4134 | | |
4135 | 39 | if (ReceiverCanBeNull) { |
4136 | 36 | llvm::BasicBlock *SelfIsNilBlock = |
4137 | 36 | CGF.createBasicBlock("objc_direct_method.self_is_nil"); |
4138 | 36 | llvm::BasicBlock *ContBlock = |
4139 | 36 | CGF.createBasicBlock("objc_direct_method.cont"); |
4140 | | |
4141 | | // if (self == nil) { |
4142 | 36 | auto selfTy = cast<llvm::PointerType>(selfValue->getType()); |
4143 | 36 | auto Zero = llvm::ConstantPointerNull::get(selfTy); |
4144 | | |
4145 | 36 | llvm::MDBuilder MDHelper(CGM.getLLVMContext()); |
4146 | 36 | Builder.CreateCondBr(Builder.CreateICmpEQ(selfValue, Zero), SelfIsNilBlock, |
4147 | 36 | ContBlock, MDHelper.createBranchWeights(1, 1 << 20)); |
4148 | | |
4149 | 36 | CGF.EmitBlock(SelfIsNilBlock); |
4150 | | |
4151 | | // return (ReturnType){ }; |
4152 | 36 | auto retTy = OMD->getReturnType(); |
4153 | 36 | Builder.SetInsertPoint(SelfIsNilBlock); |
4154 | 36 | if (!retTy->isVoidType()) { |
4155 | 32 | CGF.EmitNullInitialization(CGF.ReturnValue, retTy); |
4156 | 32 | } |
4157 | 36 | CGF.EmitBranchThroughCleanup(CGF.ReturnBlock); |
4158 | | // } |
4159 | | |
4160 | | // rest of the body |
4161 | 36 | CGF.EmitBlock(ContBlock); |
4162 | 36 | Builder.SetInsertPoint(ContBlock); |
4163 | 36 | } |
4164 | | |
4165 | | // only synthesize _cmd if it's referenced |
4166 | 39 | if (OMD->getCmdDecl()->isUsed()) { |
4167 | 0 | Builder.CreateStore(GetSelector(CGF, OMD), |
4168 | 0 | CGF.GetAddrOfLocalVar(OMD->getCmdDecl())); |
4169 | 0 | } |
4170 | 39 | } |
4171 | | |
4172 | | llvm::GlobalVariable *CGObjCCommonMac::CreateMetadataVar(Twine Name, |
4173 | | ConstantStructBuilder &Init, |
4174 | | StringRef Section, |
4175 | | CharUnits Align, |
4176 | 873 | bool AddToUsed) { |
4177 | 873 | llvm::GlobalValue::LinkageTypes LT = |
4178 | 873 | getLinkageTypeForObjCMetadata(CGM, Section); |
4179 | 873 | llvm::GlobalVariable *GV = |
4180 | 873 | Init.finishAndCreateGlobal(Name, Align, /*constant*/ false, LT); |
4181 | 873 | if (!Section.empty()) |
4182 | 860 | GV->setSection(Section); |
4183 | 873 | if (AddToUsed) |
4184 | 862 | CGM.addCompilerUsedGlobal(GV); |
4185 | 873 | return GV; |
4186 | 873 | } |
4187 | | |
4188 | | llvm::GlobalVariable *CGObjCCommonMac::CreateMetadataVar(Twine Name, |
4189 | | llvm::Constant *Init, |
4190 | | StringRef Section, |
4191 | | CharUnits Align, |
4192 | 211 | bool AddToUsed) { |
4193 | 211 | llvm::Type *Ty = Init->getType(); |
4194 | 211 | llvm::GlobalValue::LinkageTypes LT = |
4195 | 211 | getLinkageTypeForObjCMetadata(CGM, Section); |
4196 | 211 | llvm::GlobalVariable *GV = |
4197 | 211 | new llvm::GlobalVariable(CGM.getModule(), Ty, false, LT, Init, Name); |
4198 | 211 | if (!Section.empty()) |
4199 | 203 | GV->setSection(Section); |
4200 | 211 | GV->setAlignment(Align.getAsAlign()); |
4201 | 211 | if (AddToUsed) |
4202 | 211 | CGM.addCompilerUsedGlobal(GV); |
4203 | 211 | return GV; |
4204 | 211 | } |
4205 | | |
4206 | | llvm::GlobalVariable * |
4207 | | CGObjCCommonMac::CreateCStringLiteral(StringRef Name, ObjCLabelType Type, |
4208 | | bool ForceNonFragileABI, |
4209 | 13.1k | bool NullTerminate) { |
4210 | 13.1k | StringRef Label; |
4211 | 13.1k | switch (Type) { |
4212 | 1.80k | case ObjCLabelType::ClassName: Label = "OBJC_CLASS_NAME_"; break; |
4213 | 7.89k | case ObjCLabelType::MethodVarName: Label = "OBJC_METH_VAR_NAME_"; break; |
4214 | 2.58k | case ObjCLabelType::MethodVarType: Label = "OBJC_METH_VAR_TYPE_"; break; |
4215 | 877 | case ObjCLabelType::PropertyName: Label = "OBJC_PROP_NAME_ATTR_"; break; |
4216 | 13.1k | } |
4217 | | |
4218 | 13.1k | bool NonFragile = ForceNonFragileABI || isNonFragileABI()13.0k ; |
4219 | | |
4220 | 13.1k | StringRef Section; |
4221 | 13.1k | switch (Type) { |
4222 | 1.80k | case ObjCLabelType::ClassName: |
4223 | 1.37k | Section = NonFragile ? "__TEXT,__objc_classname,cstring_literals" |
4224 | 434 | : "__TEXT,__cstring,cstring_literals"; |
4225 | 1.80k | break; |
4226 | 7.89k | case ObjCLabelType::MethodVarName: |
4227 | 7.48k | Section = NonFragile ? "__TEXT,__objc_methname,cstring_literals" |
4228 | 414 | : "__TEXT,__cstring,cstring_literals"; |
4229 | 7.89k | break; |
4230 | 2.58k | case ObjCLabelType::MethodVarType: |
4231 | 2.34k | Section = NonFragile ? "__TEXT,__objc_methtype,cstring_literals" |
4232 | 240 | : "__TEXT,__cstring,cstring_literals"; |
4233 | 2.58k | break; |
4234 | 877 | case ObjCLabelType::PropertyName: |
4235 | 838 | Section = NonFragile ? "__TEXT,__objc_methname,cstring_literals" |
4236 | 39 | : "__TEXT,__cstring,cstring_literals"; |
4237 | 877 | break; |
4238 | 13.1k | } |
4239 | | |
4240 | 13.1k | llvm::Constant *Value = |
4241 | 13.1k | llvm::ConstantDataArray::getString(VMContext, Name, NullTerminate); |
4242 | 13.1k | llvm::GlobalVariable *GV = |
4243 | 13.1k | new llvm::GlobalVariable(CGM.getModule(), Value->getType(), |
4244 | 13.1k | /*isConstant=*/true, |
4245 | 13.1k | llvm::GlobalValue::PrivateLinkage, Value, Label); |
4246 | 13.1k | if (CGM.getTriple().isOSBinFormatMachO()) |
4247 | 12.8k | GV->setSection(Section); |
4248 | 13.1k | GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global); |
4249 | 13.1k | GV->setAlignment(CharUnits::One().getAsAlign()); |
4250 | 13.1k | CGM.addCompilerUsedGlobal(GV); |
4251 | | |
4252 | 13.1k | return GV; |
4253 | 13.1k | } |
4254 | | |
4255 | 167 | llvm::Function *CGObjCMac::ModuleInitFunction() { |
4256 | | // Abuse this interface function as a place to finalize. |
4257 | 167 | FinishModule(); |
4258 | 167 | return nullptr; |
4259 | 167 | } |
4260 | | |
4261 | 0 | llvm::FunctionCallee CGObjCMac::GetPropertyGetFunction() { |
4262 | 0 | return ObjCTypes.getGetPropertyFn(); |
4263 | 0 | } |
4264 | | |
4265 | 0 | llvm::FunctionCallee CGObjCMac::GetPropertySetFunction() { |
4266 | 0 | return ObjCTypes.getSetPropertyFn(); |
4267 | 0 | } |
4268 | | |
4269 | | llvm::FunctionCallee CGObjCMac::GetOptimizedPropertySetFunction(bool atomic, |
4270 | 0 | bool copy) { |
4271 | 0 | return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy); |
4272 | 0 | } |
4273 | | |
4274 | 8 | llvm::FunctionCallee CGObjCMac::GetGetStructFunction() { |
4275 | 8 | return ObjCTypes.getCopyStructFn(); |
4276 | 8 | } |
4277 | | |
4278 | 8 | llvm::FunctionCallee CGObjCMac::GetSetStructFunction() { |
4279 | 8 | return ObjCTypes.getCopyStructFn(); |
4280 | 8 | } |
4281 | | |
4282 | 0 | llvm::FunctionCallee CGObjCMac::GetCppAtomicObjectGetFunction() { |
4283 | 0 | return ObjCTypes.getCppAtomicObjectFunction(); |
4284 | 0 | } |
4285 | | |
4286 | 0 | llvm::FunctionCallee CGObjCMac::GetCppAtomicObjectSetFunction() { |
4287 | 0 | return ObjCTypes.getCppAtomicObjectFunction(); |
4288 | 0 | } |
4289 | | |
4290 | 5 | llvm::FunctionCallee CGObjCMac::EnumerationMutationFunction() { |
4291 | 5 | return ObjCTypes.getEnumerationMutationFn(); |
4292 | 5 | } |
4293 | | |
4294 | 35 | void CGObjCMac::EmitTryStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S) { |
4295 | 35 | return EmitTryOrSynchronizedStmt(CGF, S); |
4296 | 35 | } |
4297 | | |
4298 | | void CGObjCMac::EmitSynchronizedStmt(CodeGenFunction &CGF, |
4299 | 6 | const ObjCAtSynchronizedStmt &S) { |
4300 | 6 | return EmitTryOrSynchronizedStmt(CGF, S); |
4301 | 6 | } |
4302 | | |
4303 | | namespace { |
4304 | | struct PerformFragileFinally final : EHScopeStack::Cleanup { |
4305 | | const Stmt &S; |
4306 | | Address SyncArgSlot; |
4307 | | Address CallTryExitVar; |
4308 | | Address ExceptionData; |
4309 | | ObjCTypesHelper &ObjCTypes; |
4310 | | PerformFragileFinally(const Stmt *S, |
4311 | | Address SyncArgSlot, |
4312 | | Address CallTryExitVar, |
4313 | | Address ExceptionData, |
4314 | | ObjCTypesHelper *ObjCTypes) |
4315 | | : S(*S), SyncArgSlot(SyncArgSlot), CallTryExitVar(CallTryExitVar), |
4316 | 41 | ExceptionData(ExceptionData), ObjCTypes(*ObjCTypes) {} |
4317 | | |
4318 | 64 | void Emit(CodeGenFunction &CGF, Flags flags) override { |
4319 | | // Check whether we need to call objc_exception_try_exit. |
4320 | | // In optimized code, this branch will always be folded. |
4321 | 64 | llvm::BasicBlock *FinallyCallExit = |
4322 | 64 | CGF.createBasicBlock("finally.call_exit"); |
4323 | 64 | llvm::BasicBlock *FinallyNoCallExit = |
4324 | 64 | CGF.createBasicBlock("finally.no_call_exit"); |
4325 | 64 | CGF.Builder.CreateCondBr(CGF.Builder.CreateLoad(CallTryExitVar), |
4326 | 64 | FinallyCallExit, FinallyNoCallExit); |
4327 | | |
4328 | 64 | CGF.EmitBlock(FinallyCallExit); |
4329 | 64 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryExitFn(), |
4330 | 64 | ExceptionData.getPointer()); |
4331 | | |
4332 | 64 | CGF.EmitBlock(FinallyNoCallExit); |
4333 | | |
4334 | 64 | if (isa<ObjCAtTryStmt>(S)) { |
4335 | 57 | if (const ObjCAtFinallyStmt* FinallyStmt = |
4336 | 5 | cast<ObjCAtTryStmt>(S).getFinallyStmt()) { |
4337 | | // Don't try to do the @finally if this is an EH cleanup. |
4338 | 5 | if (flags.isForEHCleanup()) return0 ; |
4339 | | |
4340 | | // Save the current cleanup destination in case there's |
4341 | | // control flow inside the finally statement. |
4342 | 5 | llvm::Value *CurCleanupDest = |
4343 | 5 | CGF.Builder.CreateLoad(CGF.getNormalCleanupDestSlot()); |
4344 | | |
4345 | 5 | CGF.EmitStmt(FinallyStmt->getFinallyBody()); |
4346 | | |
4347 | 5 | if (CGF.HaveInsertPoint()) { |
4348 | 4 | CGF.Builder.CreateStore(CurCleanupDest, |
4349 | 4 | CGF.getNormalCleanupDestSlot()); |
4350 | 1 | } else { |
4351 | | // Currently, the end of the cleanup must always exist. |
4352 | 1 | CGF.EnsureInsertPoint(); |
4353 | 1 | } |
4354 | 5 | } |
4355 | 7 | } else { |
4356 | | // Emit objc_sync_exit(expr); as finally's sole statement for |
4357 | | // @synchronized. |
4358 | 7 | llvm::Value *SyncArg = CGF.Builder.CreateLoad(SyncArgSlot); |
4359 | 7 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getSyncExitFn(), SyncArg); |
4360 | 7 | } |
4361 | 64 | } |
4362 | | }; |
4363 | | |
4364 | | class FragileHazards { |
4365 | | CodeGenFunction &CGF; |
4366 | | SmallVector<llvm::Value*, 20> Locals; |
4367 | | llvm::DenseSet<llvm::BasicBlock*> BlocksBeforeTry; |
4368 | | |
4369 | | llvm::InlineAsm *ReadHazard; |
4370 | | llvm::InlineAsm *WriteHazard; |
4371 | | |
4372 | | llvm::FunctionType *GetAsmFnType(); |
4373 | | |
4374 | | void collectLocals(); |
4375 | | void emitReadHazard(CGBuilderTy &Builder); |
4376 | | |
4377 | | public: |
4378 | | FragileHazards(CodeGenFunction &CGF); |
4379 | | |
4380 | | void emitWriteHazard(); |
4381 | | void emitHazardsInNewBlocks(); |
4382 | | }; |
4383 | | } // end anonymous namespace |
4384 | | |
4385 | | /// Create the fragile-ABI read and write hazards based on the current |
4386 | | /// state of the function, which is presumed to be immediately prior |
4387 | | /// to a @try block. These hazards are used to maintain correct |
4388 | | /// semantics in the face of optimization and the fragile ABI's |
4389 | | /// cavalier use of setjmp/longjmp. |
4390 | 41 | FragileHazards::FragileHazards(CodeGenFunction &CGF) : CGF(CGF) { |
4391 | 41 | collectLocals(); |
4392 | | |
4393 | 41 | if (Locals.empty()) return0 ; |
4394 | | |
4395 | | // Collect all the blocks in the function. |
4396 | 41 | for (llvm::Function::iterator |
4397 | 97 | I = CGF.CurFn->begin(), E = CGF.CurFn->end(); I != E; ++I56 ) |
4398 | 56 | BlocksBeforeTry.insert(&*I); |
4399 | | |
4400 | 41 | llvm::FunctionType *AsmFnTy = GetAsmFnType(); |
4401 | | |
4402 | | // Create a read hazard for the allocas. This inhibits dead-store |
4403 | | // optimizations and forces the values to memory. This hazard is |
4404 | | // inserted before any 'throwing' calls in the protected scope to |
4405 | | // reflect the possibility that the variables might be read from the |
4406 | | // catch block if the call throws. |
4407 | 41 | { |
4408 | 41 | std::string Constraint; |
4409 | 117 | for (unsigned I = 0, E = Locals.size(); I != E; ++I76 ) { |
4410 | 76 | if (I) Constraint += ','35 ; |
4411 | 76 | Constraint += "*m"; |
4412 | 76 | } |
4413 | | |
4414 | 41 | ReadHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false); |
4415 | 41 | } |
4416 | | |
4417 | | // Create a write hazard for the allocas. This inhibits folding |
4418 | | // loads across the hazard. This hazard is inserted at the |
4419 | | // beginning of the catch path to reflect the possibility that the |
4420 | | // variables might have been written within the protected scope. |
4421 | 41 | { |
4422 | 41 | std::string Constraint; |
4423 | 117 | for (unsigned I = 0, E = Locals.size(); I != E; ++I76 ) { |
4424 | 76 | if (I) Constraint += ','35 ; |
4425 | 76 | Constraint += "=*m"; |
4426 | 76 | } |
4427 | | |
4428 | 41 | WriteHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false); |
4429 | 41 | } |
4430 | 41 | } |
4431 | | |
4432 | | /// Emit a write hazard at the current location. |
4433 | 41 | void FragileHazards::emitWriteHazard() { |
4434 | 41 | if (Locals.empty()) return0 ; |
4435 | | |
4436 | 41 | CGF.EmitNounwindRuntimeCall(WriteHazard, Locals); |
4437 | 41 | } |
4438 | | |
4439 | 55 | void FragileHazards::emitReadHazard(CGBuilderTy &Builder) { |
4440 | 55 | assert(!Locals.empty()); |
4441 | 55 | llvm::CallInst *call = Builder.CreateCall(ReadHazard, Locals); |
4442 | 55 | call->setDoesNotThrow(); |
4443 | 55 | call->setCallingConv(CGF.getRuntimeCC()); |
4444 | 55 | } |
4445 | | |
4446 | | /// Emit read hazards in all the protected blocks, i.e. all the blocks |
4447 | | /// which have been inserted since the beginning of the try. |
4448 | 41 | void FragileHazards::emitHazardsInNewBlocks() { |
4449 | 41 | if (Locals.empty()) return0 ; |
4450 | | |
4451 | 41 | CGBuilderTy Builder(CGF, CGF.getLLVMContext()); |
4452 | | |
4453 | | // Iterate through all blocks, skipping those prior to the try. |
4454 | 41 | for (llvm::Function::iterator |
4455 | 284 | FI = CGF.CurFn->begin(), FE = CGF.CurFn->end(); FI != FE; ++FI243 ) { |
4456 | 243 | llvm::BasicBlock &BB = *FI; |
4457 | 243 | if (BlocksBeforeTry.count(&BB)) continue56 ; |
4458 | | |
4459 | | // Walk through all the calls in the block. |
4460 | 187 | for (llvm::BasicBlock::iterator |
4461 | 894 | BI = BB.begin(), BE = BB.end(); BI != BE; ++BI707 ) { |
4462 | 707 | llvm::Instruction &I = *BI; |
4463 | | |
4464 | | // Ignore instructions that aren't non-intrinsic calls. |
4465 | | // These are the only calls that can possibly call longjmp. |
4466 | 707 | if (!isa<llvm::CallInst>(I) && !isa<llvm::InvokeInst>(I)568 ) |
4467 | 535 | continue; |
4468 | 172 | if (isa<llvm::IntrinsicInst>(I)) |
4469 | 18 | continue; |
4470 | | |
4471 | | // Ignore call sites marked nounwind. This may be questionable, |
4472 | | // since 'nounwind' doesn't necessarily mean 'does not call longjmp'. |
4473 | 154 | if (cast<llvm::CallBase>(I).doesNotThrow()) |
4474 | 99 | continue; |
4475 | | |
4476 | | // Insert a read hazard before the call. This will ensure that |
4477 | | // any writes to the locals are performed before making the |
4478 | | // call. If the call throws, then this is sufficient to |
4479 | | // guarantee correctness as long as it doesn't also write to any |
4480 | | // locals. |
4481 | 55 | Builder.SetInsertPoint(&BB, BI); |
4482 | 55 | emitReadHazard(Builder); |
4483 | 55 | } |
4484 | 187 | } |
4485 | 41 | } |
4486 | | |
4487 | 82 | static void addIfPresent(llvm::DenseSet<llvm::Value*> &S, Address V) { |
4488 | 82 | if (V.isValid()) S.insert(V.getPointer())5 ; |
4489 | 82 | } |
4490 | | |
4491 | 41 | void FragileHazards::collectLocals() { |
4492 | | // Compute a set of allocas to ignore. |
4493 | 41 | llvm::DenseSet<llvm::Value*> AllocasToIgnore; |
4494 | 41 | addIfPresent(AllocasToIgnore, CGF.ReturnValue); |
4495 | 41 | addIfPresent(AllocasToIgnore, CGF.NormalCleanupDest); |
4496 | | |
4497 | | // Collect all the allocas currently in the function. This is |
4498 | | // probably way too aggressive. |
4499 | 41 | llvm::BasicBlock &Entry = CGF.CurFn->getEntryBlock(); |
4500 | 41 | for (llvm::BasicBlock::iterator |
4501 | 241 | I = Entry.begin(), E = Entry.end(); I != E; ++I200 ) |
4502 | 200 | if (isa<llvm::AllocaInst>(*I) && !AllocasToIgnore.count(&*I)81 ) |
4503 | 76 | Locals.push_back(&*I); |
4504 | 41 | } |
4505 | | |
4506 | 41 | llvm::FunctionType *FragileHazards::GetAsmFnType() { |
4507 | 41 | SmallVector<llvm::Type *, 16> tys(Locals.size()); |
4508 | 117 | for (unsigned i = 0, e = Locals.size(); i != e; ++i76 ) |
4509 | 76 | tys[i] = Locals[i]->getType(); |
4510 | 41 | return llvm::FunctionType::get(CGF.VoidTy, tys, false); |
4511 | 41 | } |
4512 | | |
4513 | | /* |
4514 | | |
4515 | | Objective-C setjmp-longjmp (sjlj) Exception Handling |
4516 | | -- |
4517 | | |
4518 | | A catch buffer is a setjmp buffer plus: |
4519 | | - a pointer to the exception that was caught |
4520 | | - a pointer to the previous exception data buffer |
4521 | | - two pointers of reserved storage |
4522 | | Therefore catch buffers form a stack, with a pointer to the top |
4523 | | of the stack kept in thread-local storage. |
4524 | | |
4525 | | objc_exception_try_enter pushes a catch buffer onto the EH stack. |
4526 | | objc_exception_try_exit pops the given catch buffer, which is |
4527 | | required to be the top of the EH stack. |
4528 | | objc_exception_throw pops the top of the EH stack, writes the |
4529 | | thrown exception into the appropriate field, and longjmps |
4530 | | to the setjmp buffer. It crashes the process (with a printf |
4531 | | and an abort()) if there are no catch buffers on the stack. |
4532 | | objc_exception_extract just reads the exception pointer out of the |
4533 | | catch buffer. |
4534 | | |
4535 | | There's no reason an implementation couldn't use a light-weight |
4536 | | setjmp here --- something like __builtin_setjmp, but API-compatible |
4537 | | with the heavyweight setjmp. This will be more important if we ever |
4538 | | want to implement correct ObjC/C++ exception interactions for the |
4539 | | fragile ABI. |
4540 | | |
4541 | | Note that for this use of setjmp/longjmp to be correct, we may need |
4542 | | to mark some local variables volatile: if a non-volatile local |
4543 | | variable is modified between the setjmp and the longjmp, it has |
4544 | | indeterminate value. For the purposes of LLVM IR, it may be |
4545 | | sufficient to make loads and stores within the @try (to variables |
4546 | | declared outside the @try) volatile. This is necessary for |
4547 | | optimized correctness, but is not currently being done; this is |
4548 | | being tracked as rdar://problem/8160285 |
4549 | | |
4550 | | The basic framework for a @try-catch-finally is as follows: |
4551 | | { |
4552 | | objc_exception_data d; |
4553 | | id _rethrow = null; |
4554 | | bool _call_try_exit = true; |
4555 | | |
4556 | | objc_exception_try_enter(&d); |
4557 | | if (!setjmp(d.jmp_buf)) { |
4558 | | ... try body ... |
4559 | | } else { |
4560 | | // exception path |
4561 | | id _caught = objc_exception_extract(&d); |
4562 | | |
4563 | | // enter new try scope for handlers |
4564 | | if (!setjmp(d.jmp_buf)) { |
4565 | | ... match exception and execute catch blocks ... |
4566 | | |
4567 | | // fell off end, rethrow. |
4568 | | _rethrow = _caught; |
4569 | | ... jump-through-finally to finally_rethrow ... |
4570 | | } else { |
4571 | | // exception in catch block |
4572 | | _rethrow = objc_exception_extract(&d); |
4573 | | _call_try_exit = false; |
4574 | | ... jump-through-finally to finally_rethrow ... |
4575 | | } |
4576 | | } |
4577 | | ... jump-through-finally to finally_end ... |
4578 | | |
4579 | | finally: |
4580 | | if (_call_try_exit) |
4581 | | objc_exception_try_exit(&d); |
4582 | | |
4583 | | ... finally block .... |
4584 | | ... dispatch to finally destination ... |
4585 | | |
4586 | | finally_rethrow: |
4587 | | objc_exception_throw(_rethrow); |
4588 | | |
4589 | | finally_end: |
4590 | | } |
4591 | | |
4592 | | This framework differs slightly from the one gcc uses, in that gcc |
4593 | | uses _rethrow to determine if objc_exception_try_exit should be called |
4594 | | and if the object should be rethrown. This breaks in the face of |
4595 | | throwing nil and introduces unnecessary branches. |
4596 | | |
4597 | | We specialize this framework for a few particular circumstances: |
4598 | | |
4599 | | - If there are no catch blocks, then we avoid emitting the second |
4600 | | exception handling context. |
4601 | | |
4602 | | - If there is a catch-all catch block (i.e. @catch(...) or @catch(id |
4603 | | e)) we avoid emitting the code to rethrow an uncaught exception. |
4604 | | |
4605 | | - FIXME: If there is no @finally block we can do a few more |
4606 | | simplifications. |
4607 | | |
4608 | | Rethrows and Jumps-Through-Finally |
4609 | | -- |
4610 | | |
4611 | | '@throw;' is supported by pushing the currently-caught exception |
4612 | | onto ObjCEHStack while the @catch blocks are emitted. |
4613 | | |
4614 | | Branches through the @finally block are handled with an ordinary |
4615 | | normal cleanup. We do not register an EH cleanup; fragile-ABI ObjC |
4616 | | exceptions are not compatible with C++ exceptions, and this is |
4617 | | hardly the only place where this will go wrong. |
4618 | | |
4619 | | @synchronized(expr) { stmt; } is emitted as if it were: |
4620 | | id synch_value = expr; |
4621 | | objc_sync_enter(synch_value); |
4622 | | @try { stmt; } @finally { objc_sync_exit(synch_value); } |
4623 | | */ |
4624 | | |
4625 | | void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, |
4626 | 41 | const Stmt &S) { |
4627 | 41 | bool isTry = isa<ObjCAtTryStmt>(S); |
4628 | | |
4629 | | // A destination for the fall-through edges of the catch handlers to |
4630 | | // jump to. |
4631 | 41 | CodeGenFunction::JumpDest FinallyEnd = |
4632 | 41 | CGF.getJumpDestInCurrentScope("finally.end"); |
4633 | | |
4634 | | // A destination for the rethrow edge of the catch handlers to jump |
4635 | | // to. |
4636 | 41 | CodeGenFunction::JumpDest FinallyRethrow = |
4637 | 41 | CGF.getJumpDestInCurrentScope("finally.rethrow"); |
4638 | | |
4639 | | // For @synchronized, call objc_sync_enter(sync.expr). The |
4640 | | // evaluation of the expression must occur before we enter the |
4641 | | // @synchronized. We can't avoid a temp here because we need the |
4642 | | // value to be preserved. If the backend ever does liveness |
4643 | | // correctly after setjmp, this will be unnecessary. |
4644 | 41 | Address SyncArgSlot = Address::invalid(); |
4645 | 41 | if (!isTry) { |
4646 | 6 | llvm::Value *SyncArg = |
4647 | 6 | CGF.EmitScalarExpr(cast<ObjCAtSynchronizedStmt>(S).getSynchExpr()); |
4648 | 6 | SyncArg = CGF.Builder.CreateBitCast(SyncArg, ObjCTypes.ObjectPtrTy); |
4649 | 6 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getSyncEnterFn(), SyncArg); |
4650 | | |
4651 | 6 | SyncArgSlot = CGF.CreateTempAlloca(SyncArg->getType(), |
4652 | 6 | CGF.getPointerAlign(), "sync.arg"); |
4653 | 6 | CGF.Builder.CreateStore(SyncArg, SyncArgSlot); |
4654 | 6 | } |
4655 | | |
4656 | | // Allocate memory for the setjmp buffer. This needs to be kept |
4657 | | // live throughout the try and catch blocks. |
4658 | 41 | Address ExceptionData = CGF.CreateTempAlloca(ObjCTypes.ExceptionDataTy, |
4659 | 41 | CGF.getPointerAlign(), |
4660 | 41 | "exceptiondata.ptr"); |
4661 | | |
4662 | | // Create the fragile hazards. Note that this will not capture any |
4663 | | // of the allocas required for exception processing, but will |
4664 | | // capture the current basic block (which extends all the way to the |
4665 | | // setjmp call) as "before the @try". |
4666 | 41 | FragileHazards Hazards(CGF); |
4667 | | |
4668 | | // Create a flag indicating whether the cleanup needs to call |
4669 | | // objc_exception_try_exit. This is true except when |
4670 | | // - no catches match and we're branching through the cleanup |
4671 | | // just to rethrow the exception, or |
4672 | | // - a catch matched and we're falling out of the catch handler. |
4673 | | // The setjmp-safety rule here is that we should always store to this |
4674 | | // variable in a place that dominates the branch through the cleanup |
4675 | | // without passing through any setjmps. |
4676 | 41 | Address CallTryExitVar = CGF.CreateTempAlloca(CGF.Builder.getInt1Ty(), |
4677 | 41 | CharUnits::One(), |
4678 | 41 | "_call_try_exit"); |
4679 | | |
4680 | | // A slot containing the exception to rethrow. Only needed when we |
4681 | | // have both a @catch and a @finally. |
4682 | 41 | Address PropagatingExnVar = Address::invalid(); |
4683 | | |
4684 | | // Push a normal cleanup to leave the try scope. |
4685 | 41 | CGF.EHStack.pushCleanup<PerformFragileFinally>(NormalAndEHCleanup, &S, |
4686 | 41 | SyncArgSlot, |
4687 | 41 | CallTryExitVar, |
4688 | 41 | ExceptionData, |
4689 | 41 | &ObjCTypes); |
4690 | | |
4691 | | // Enter a try block: |
4692 | | // - Call objc_exception_try_enter to push ExceptionData on top of |
4693 | | // the EH stack. |
4694 | 41 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryEnterFn(), |
4695 | 41 | ExceptionData.getPointer()); |
4696 | | |
4697 | | // - Call setjmp on the exception data buffer. |
4698 | 41 | llvm::Constant *Zero = llvm::ConstantInt::get(CGF.Builder.getInt32Ty(), 0); |
4699 | 41 | llvm::Value *GEPIndexes[] = { Zero, Zero, Zero }; |
4700 | 41 | llvm::Value *SetJmpBuffer = CGF.Builder.CreateGEP( |
4701 | 41 | ObjCTypes.ExceptionDataTy, ExceptionData.getPointer(), GEPIndexes, |
4702 | 41 | "setjmp_buffer"); |
4703 | 41 | llvm::CallInst *SetJmpResult = CGF.EmitNounwindRuntimeCall( |
4704 | 41 | ObjCTypes.getSetJmpFn(), SetJmpBuffer, "setjmp_result"); |
4705 | 41 | SetJmpResult->setCanReturnTwice(); |
4706 | | |
4707 | | // If setjmp returned 0, enter the protected block; otherwise, |
4708 | | // branch to the handler. |
4709 | 41 | llvm::BasicBlock *TryBlock = CGF.createBasicBlock("try"); |
4710 | 41 | llvm::BasicBlock *TryHandler = CGF.createBasicBlock("try.handler"); |
4711 | 41 | llvm::Value *DidCatch = |
4712 | 41 | CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception"); |
4713 | 41 | CGF.Builder.CreateCondBr(DidCatch, TryHandler, TryBlock); |
4714 | | |
4715 | | // Emit the protected block. |
4716 | 41 | CGF.EmitBlock(TryBlock); |
4717 | 41 | CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar); |
4718 | 35 | CGF.EmitStmt(isTry ? cast<ObjCAtTryStmt>(S).getTryBody() |
4719 | 6 | : cast<ObjCAtSynchronizedStmt>(S).getSynchBody()); |
4720 | | |
4721 | 41 | CGBuilderTy::InsertPoint TryFallthroughIP = CGF.Builder.saveAndClearIP(); |
4722 | | |
4723 | | // Emit the exception handler block. |
4724 | 41 | CGF.EmitBlock(TryHandler); |
4725 | | |
4726 | | // Don't optimize loads of the in-scope locals across this point. |
4727 | 41 | Hazards.emitWriteHazard(); |
4728 | | |
4729 | | // For a @synchronized (or a @try with no catches), just branch |
4730 | | // through the cleanup to the rethrow block. |
4731 | 41 | if (!isTry || !cast<ObjCAtTryStmt>(S).getNumCatchStmts()35 ) { |
4732 | | // Tell the cleanup not to re-pop the exit. |
4733 | 10 | CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar); |
4734 | 10 | CGF.EmitBranchThroughCleanup(FinallyRethrow); |
4735 | | |
4736 | | // Otherwise, we have to match against the caught exceptions. |
4737 | 31 | } else { |
4738 | | // Retrieve the exception object. We may emit multiple blocks but |
4739 | | // nothing can cross this so the value is already in SSA form. |
4740 | 31 | llvm::CallInst *Caught = |
4741 | 31 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(), |
4742 | 31 | ExceptionData.getPointer(), "caught"); |
4743 | | |
4744 | | // Push the exception to rethrow onto the EH value stack for the |
4745 | | // benefit of any @throws in the handlers. |
4746 | 31 | CGF.ObjCEHValueStack.push_back(Caught); |
4747 | | |
4748 | 31 | const ObjCAtTryStmt* AtTryStmt = cast<ObjCAtTryStmt>(&S); |
4749 | | |
4750 | 31 | bool HasFinally = (AtTryStmt->getFinallyStmt() != nullptr); |
4751 | | |
4752 | 31 | llvm::BasicBlock *CatchBlock = nullptr; |
4753 | 31 | llvm::BasicBlock *CatchHandler = nullptr; |
4754 | 31 | if (HasFinally) { |
4755 | | // Save the currently-propagating exception before |
4756 | | // objc_exception_try_enter clears the exception slot. |
4757 | 1 | PropagatingExnVar = CGF.CreateTempAlloca(Caught->getType(), |
4758 | 1 | CGF.getPointerAlign(), |
4759 | 1 | "propagating_exception"); |
4760 | 1 | CGF.Builder.CreateStore(Caught, PropagatingExnVar); |
4761 | | |
4762 | | // Enter a new exception try block (in case a @catch block |
4763 | | // throws an exception). |
4764 | 1 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryEnterFn(), |
4765 | 1 | ExceptionData.getPointer()); |
4766 | | |
4767 | 1 | llvm::CallInst *SetJmpResult = |
4768 | 1 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getSetJmpFn(), |
4769 | 1 | SetJmpBuffer, "setjmp.result"); |
4770 | 1 | SetJmpResult->setCanReturnTwice(); |
4771 | | |
4772 | 1 | llvm::Value *Threw = |
4773 | 1 | CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception"); |
4774 | | |
4775 | 1 | CatchBlock = CGF.createBasicBlock("catch"); |
4776 | 1 | CatchHandler = CGF.createBasicBlock("catch_for_catch"); |
4777 | 1 | CGF.Builder.CreateCondBr(Threw, CatchHandler, CatchBlock); |
4778 | | |
4779 | 1 | CGF.EmitBlock(CatchBlock); |
4780 | 1 | } |
4781 | | |
4782 | 31 | CGF.Builder.CreateStore(CGF.Builder.getInt1(HasFinally), CallTryExitVar); |
4783 | | |
4784 | | // Handle catch list. As a special case we check if everything is |
4785 | | // matched and avoid generating code for falling off the end if |
4786 | | // so. |
4787 | 31 | bool AllMatched = false; |
4788 | 40 | for (unsigned I = 0, N = AtTryStmt->getNumCatchStmts(); I != N; ++I9 ) { |
4789 | 33 | const ObjCAtCatchStmt *CatchStmt = AtTryStmt->getCatchStmt(I); |
4790 | | |
4791 | 33 | const VarDecl *CatchParam = CatchStmt->getCatchParamDecl(); |
4792 | 33 | const ObjCObjectPointerType *OPT = nullptr; |
4793 | | |
4794 | | // catch(...) always matches. |
4795 | 33 | if (!CatchParam) { |
4796 | 8 | AllMatched = true; |
4797 | 25 | } else { |
4798 | 25 | OPT = CatchParam->getType()->getAs<ObjCObjectPointerType>(); |
4799 | | |
4800 | | // catch(id e) always matches under this ABI, since only |
4801 | | // ObjC exceptions end up here in the first place. |
4802 | | // FIXME: For the time being we also match id<X>; this should |
4803 | | // be rejected by Sema instead. |
4804 | 25 | if (OPT && (OPT->isObjCIdType() || OPT->isObjCQualifiedIdType()9 )) |
4805 | 16 | AllMatched = true; |
4806 | 25 | } |
4807 | | |
4808 | | // If this is a catch-all, we don't need to test anything. |
4809 | 33 | if (AllMatched) { |
4810 | 24 | CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF); |
4811 | | |
4812 | 24 | if (CatchParam) { |
4813 | 16 | CGF.EmitAutoVarDecl(*CatchParam); |
4814 | 16 | assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?"); |
4815 | | |
4816 | | // These types work out because ConvertType(id) == i8*. |
4817 | 16 | EmitInitOfCatchParam(CGF, Caught, CatchParam); |
4818 | 16 | } |
4819 | | |
4820 | 24 | CGF.EmitStmt(CatchStmt->getCatchBody()); |
4821 | | |
4822 | | // The scope of the catch variable ends right here. |
4823 | 24 | CatchVarCleanups.ForceCleanup(); |
4824 | | |
4825 | 24 | CGF.EmitBranchThroughCleanup(FinallyEnd); |
4826 | 24 | break; |
4827 | 24 | } |
4828 | | |
4829 | 9 | assert(OPT && "Unexpected non-object pointer type in @catch"); |
4830 | 9 | const ObjCObjectType *ObjTy = OPT->getObjectType(); |
4831 | | |
4832 | | // FIXME: @catch (Class c) ? |
4833 | 9 | ObjCInterfaceDecl *IDecl = ObjTy->getInterface(); |
4834 | 9 | assert(IDecl && "Catch parameter must have Objective-C type!"); |
4835 | | |
4836 | | // Check if the @catch block matches the exception object. |
4837 | 9 | llvm::Value *Class = EmitClassRef(CGF, IDecl); |
4838 | | |
4839 | 9 | llvm::Value *matchArgs[] = { Class, Caught }; |
4840 | 9 | llvm::CallInst *Match = |
4841 | 9 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionMatchFn(), |
4842 | 9 | matchArgs, "match"); |
4843 | | |
4844 | 9 | llvm::BasicBlock *MatchedBlock = CGF.createBasicBlock("match"); |
4845 | 9 | llvm::BasicBlock *NextCatchBlock = CGF.createBasicBlock("catch.next"); |
4846 | | |
4847 | 9 | CGF.Builder.CreateCondBr(CGF.Builder.CreateIsNotNull(Match, "matched"), |
4848 | 9 | MatchedBlock, NextCatchBlock); |
4849 | | |
4850 | | // Emit the @catch block. |
4851 | 9 | CGF.EmitBlock(MatchedBlock); |
4852 | | |
4853 | | // Collect any cleanups for the catch variable. The scope lasts until |
4854 | | // the end of the catch body. |
4855 | 9 | CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF); |
4856 | | |
4857 | 9 | CGF.EmitAutoVarDecl(*CatchParam); |
4858 | 9 | assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?"); |
4859 | | |
4860 | | // Initialize the catch variable. |
4861 | 9 | llvm::Value *Tmp = |
4862 | 9 | CGF.Builder.CreateBitCast(Caught, |
4863 | 9 | CGF.ConvertType(CatchParam->getType())); |
4864 | 9 | EmitInitOfCatchParam(CGF, Tmp, CatchParam); |
4865 | | |
4866 | 9 | CGF.EmitStmt(CatchStmt->getCatchBody()); |
4867 | | |
4868 | | // We're done with the catch variable. |
4869 | 9 | CatchVarCleanups.ForceCleanup(); |
4870 | | |
4871 | 9 | CGF.EmitBranchThroughCleanup(FinallyEnd); |
4872 | | |
4873 | 9 | CGF.EmitBlock(NextCatchBlock); |
4874 | 9 | } |
4875 | | |
4876 | 31 | CGF.ObjCEHValueStack.pop_back(); |
4877 | | |
4878 | | // If nothing wanted anything to do with the caught exception, |
4879 | | // kill the extract call. |
4880 | 31 | if (Caught->use_empty()) |
4881 | 8 | Caught->eraseFromParent(); |
4882 | | |
4883 | 31 | if (!AllMatched) |
4884 | 7 | CGF.EmitBranchThroughCleanup(FinallyRethrow); |
4885 | | |
4886 | 31 | if (HasFinally) { |
4887 | | // Emit the exception handler for the @catch blocks. |
4888 | 1 | CGF.EmitBlock(CatchHandler); |
4889 | | |
4890 | | // In theory we might now need a write hazard, but actually it's |
4891 | | // unnecessary because there's no local-accessing code between |
4892 | | // the try's write hazard and here. |
4893 | | //Hazards.emitWriteHazard(); |
4894 | | |
4895 | | // Extract the new exception and save it to the |
4896 | | // propagating-exception slot. |
4897 | 1 | assert(PropagatingExnVar.isValid()); |
4898 | 1 | llvm::CallInst *NewCaught = |
4899 | 1 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(), |
4900 | 1 | ExceptionData.getPointer(), "caught"); |
4901 | 1 | CGF.Builder.CreateStore(NewCaught, PropagatingExnVar); |
4902 | | |
4903 | | // Don't pop the catch handler; the throw already did. |
4904 | 1 | CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar); |
4905 | 1 | CGF.EmitBranchThroughCleanup(FinallyRethrow); |
4906 | 1 | } |
4907 | 31 | } |
4908 | | |
4909 | | // Insert read hazards as required in the new blocks. |
4910 | 41 | Hazards.emitHazardsInNewBlocks(); |
4911 | | |
4912 | | // Pop the cleanup. |
4913 | 41 | CGF.Builder.restoreIP(TryFallthroughIP); |
4914 | 41 | if (CGF.HaveInsertPoint()) |
4915 | 36 | CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar); |
4916 | 41 | CGF.PopCleanupBlock(); |
4917 | 41 | CGF.EmitBlock(FinallyEnd.getBlock(), true); |
4918 | | |
4919 | | // Emit the rethrow block. |
4920 | 41 | CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP(); |
4921 | 41 | CGF.EmitBlock(FinallyRethrow.getBlock(), true); |
4922 | 41 | if (CGF.HaveInsertPoint()) { |
4923 | | // If we have a propagating-exception variable, check it. |
4924 | 17 | llvm::Value *PropagatingExn; |
4925 | 17 | if (PropagatingExnVar.isValid()) { |
4926 | 1 | PropagatingExn = CGF.Builder.CreateLoad(PropagatingExnVar); |
4927 | | |
4928 | | // Otherwise, just look in the buffer for the exception to throw. |
4929 | 16 | } else { |
4930 | 16 | llvm::CallInst *Caught = |
4931 | 16 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(), |
4932 | 16 | ExceptionData.getPointer()); |
4933 | 16 | PropagatingExn = Caught; |
4934 | 16 | } |
4935 | | |
4936 | 17 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionThrowFn(), |
4937 | 17 | PropagatingExn); |
4938 | 17 | CGF.Builder.CreateUnreachable(); |
4939 | 17 | } |
4940 | | |
4941 | 41 | CGF.Builder.restoreIP(SavedIP); |
4942 | 41 | } |
4943 | | |
4944 | | void CGObjCMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF, |
4945 | | const ObjCAtThrowStmt &S, |
4946 | 3 | bool ClearInsertionPoint) { |
4947 | 3 | llvm::Value *ExceptionAsObject; |
4948 | | |
4949 | 3 | if (const Expr *ThrowExpr = S.getThrowExpr()) { |
4950 | 2 | llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr); |
4951 | 2 | ExceptionAsObject = |
4952 | 2 | CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy); |
4953 | 1 | } else { |
4954 | 1 | assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) && |
4955 | 1 | "Unexpected rethrow outside @catch block."); |
4956 | 1 | ExceptionAsObject = CGF.ObjCEHValueStack.back(); |
4957 | 1 | } |
4958 | | |
4959 | 3 | CGF.EmitRuntimeCall(ObjCTypes.getExceptionThrowFn(), ExceptionAsObject) |
4960 | 3 | ->setDoesNotReturn(); |
4961 | 3 | CGF.Builder.CreateUnreachable(); |
4962 | | |
4963 | | // Clear the insertion point to indicate we are in unreachable code. |
4964 | 3 | if (ClearInsertionPoint) |
4965 | 3 | CGF.Builder.ClearInsertionPoint(); |
4966 | 3 | } |
4967 | | |
4968 | | /// EmitObjCWeakRead - Code gen for loading value of a __weak |
4969 | | /// object: objc_read_weak (id *src) |
4970 | | /// |
4971 | | llvm::Value * CGObjCMac::EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF, |
4972 | 33 | Address AddrWeakObj) { |
4973 | 33 | llvm::Type* DestTy = AddrWeakObj.getElementType(); |
4974 | 33 | AddrWeakObj = CGF.Builder.CreateBitCast(AddrWeakObj, |
4975 | 33 | ObjCTypes.PtrObjectPtrTy); |
4976 | 33 | llvm::Value *read_weak = |
4977 | 33 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcReadWeakFn(), |
4978 | 33 | AddrWeakObj.getPointer(), "weakread"); |
4979 | 33 | read_weak = CGF.Builder.CreateBitCast(read_weak, DestTy); |
4980 | 33 | return read_weak; |
4981 | 33 | } |
4982 | | |
4983 | | /// EmitObjCWeakAssign - Code gen for assigning to a __weak object. |
4984 | | /// objc_assign_weak (id src, id *dst) |
4985 | | /// |
4986 | | void CGObjCMac::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF, |
4987 | 22 | llvm::Value *src, Address dst) { |
4988 | 22 | llvm::Type * SrcTy = src->getType(); |
4989 | 22 | if (!isa<llvm::PointerType>(SrcTy)) { |
4990 | 0 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy); |
4991 | 0 | assert(Size <= 8 && "does not support size > 8"); |
4992 | 0 | src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty) |
4993 | 0 | : CGF.Builder.CreateBitCast(src, CGM.Int64Ty); |
4994 | 0 | src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy); |
4995 | 0 | } |
4996 | 22 | src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy); |
4997 | 22 | dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy); |
4998 | 22 | llvm::Value *args[] = { src, dst.getPointer() }; |
4999 | 22 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignWeakFn(), |
5000 | 22 | args, "weakassign"); |
5001 | 22 | } |
5002 | | |
5003 | | /// EmitObjCGlobalAssign - Code gen for assigning to a __strong object. |
5004 | | /// objc_assign_global (id src, id *dst) |
5005 | | /// |
5006 | | void CGObjCMac::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF, |
5007 | | llvm::Value *src, Address dst, |
5008 | 84 | bool threadlocal) { |
5009 | 84 | llvm::Type * SrcTy = src->getType(); |
5010 | 84 | if (!isa<llvm::PointerType>(SrcTy)) { |
5011 | 0 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy); |
5012 | 0 | assert(Size <= 8 && "does not support size > 8"); |
5013 | 0 | src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty) |
5014 | 0 | : CGF.Builder.CreateBitCast(src, CGM.Int64Ty); |
5015 | 0 | src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy); |
5016 | 0 | } |
5017 | 84 | src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy); |
5018 | 84 | dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy); |
5019 | 84 | llvm::Value *args[] = { src, dst.getPointer() }; |
5020 | 84 | if (!threadlocal) |
5021 | 84 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignGlobalFn(), |
5022 | 84 | args, "globalassign"); |
5023 | 0 | else |
5024 | 0 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignThreadLocalFn(), |
5025 | 0 | args, "threadlocalassign"); |
5026 | 84 | } |
5027 | | |
5028 | | /// EmitObjCIvarAssign - Code gen for assigning to a __strong object. |
5029 | | /// objc_assign_ivar (id src, id *dst, ptrdiff_t ivaroffset) |
5030 | | /// |
5031 | | void CGObjCMac::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF, |
5032 | | llvm::Value *src, Address dst, |
5033 | 43 | llvm::Value *ivarOffset) { |
5034 | 43 | assert(ivarOffset && "EmitObjCIvarAssign - ivarOffset is NULL"); |
5035 | 43 | llvm::Type * SrcTy = src->getType(); |
5036 | 43 | if (!isa<llvm::PointerType>(SrcTy)) { |
5037 | 0 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy); |
5038 | 0 | assert(Size <= 8 && "does not support size > 8"); |
5039 | 0 | src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty) |
5040 | 0 | : CGF.Builder.CreateBitCast(src, CGM.Int64Ty); |
5041 | 0 | src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy); |
5042 | 0 | } |
5043 | 43 | src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy); |
5044 | 43 | dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy); |
5045 | 43 | llvm::Value *args[] = { src, dst.getPointer(), ivarOffset }; |
5046 | 43 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignIvarFn(), args); |
5047 | 43 | } |
5048 | | |
5049 | | /// EmitObjCStrongCastAssign - Code gen for assigning to a __strong cast object. |
5050 | | /// objc_assign_strongCast (id src, id *dst) |
5051 | | /// |
5052 | | void CGObjCMac::EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF, |
5053 | 66 | llvm::Value *src, Address dst) { |
5054 | 66 | llvm::Type * SrcTy = src->getType(); |
5055 | 66 | if (!isa<llvm::PointerType>(SrcTy)) { |
5056 | 0 | unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy); |
5057 | 0 | assert(Size <= 8 && "does not support size > 8"); |
5058 | 0 | src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty) |
5059 | 0 | : CGF.Builder.CreateBitCast(src, CGM.Int64Ty); |
5060 | 0 | src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy); |
5061 | 0 | } |
5062 | 66 | src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy); |
5063 | 66 | dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy); |
5064 | 66 | llvm::Value *args[] = { src, dst.getPointer() }; |
5065 | 66 | CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignStrongCastFn(), |
5066 | 66 | args, "strongassign"); |
5067 | 66 | } |
5068 | | |
5069 | | void CGObjCMac::EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF, |
5070 | | Address DestPtr, |
5071 | | Address SrcPtr, |
5072 | 27 | llvm::Value *size) { |
5073 | 27 | SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, ObjCTypes.Int8PtrTy); |
5074 | 27 | DestPtr = CGF.Builder.CreateBitCast(DestPtr, ObjCTypes.Int8PtrTy); |
5075 | 27 | llvm::Value *args[] = { DestPtr.getPointer(), SrcPtr.getPointer(), size }; |
5076 | 27 | CGF.EmitNounwindRuntimeCall(ObjCTypes.GcMemmoveCollectableFn(), args); |
5077 | 27 | } |
5078 | | |
5079 | | /// EmitObjCValueForIvar - Code Gen for ivar reference. |
5080 | | /// |
5081 | | LValue CGObjCMac::EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, |
5082 | | QualType ObjectTy, |
5083 | | llvm::Value *BaseValue, |
5084 | | const ObjCIvarDecl *Ivar, |
5085 | 279 | unsigned CVRQualifiers) { |
5086 | 279 | const ObjCInterfaceDecl *ID = |
5087 | 279 | ObjectTy->castAs<ObjCObjectType>()->getInterface(); |
5088 | 279 | return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers, |
5089 | 279 | EmitIvarOffset(CGF, ID, Ivar)); |
5090 | 279 | } |
5091 | | |
5092 | | llvm::Value *CGObjCMac::EmitIvarOffset(CodeGen::CodeGenFunction &CGF, |
5093 | | const ObjCInterfaceDecl *Interface, |
5094 | 279 | const ObjCIvarDecl *Ivar) { |
5095 | 279 | uint64_t Offset = ComputeIvarBaseOffset(CGM, Interface, Ivar); |
5096 | 279 | return llvm::ConstantInt::get( |
5097 | 279 | CGM.getTypes().ConvertType(CGM.getContext().LongTy), |
5098 | 279 | Offset); |
5099 | 279 | } |
5100 | | |
5101 | | /* *** Private Interface *** */ |
5102 | | |
5103 | | std::string CGObjCCommonMac::GetSectionName(StringRef Section, |
5104 | 81.6k | StringRef MachOAttributes) { |
5105 | 81.6k | switch (CGM.getTriple().getObjectFormat()) { |
5106 | 0 | case llvm::Triple::UnknownObjectFormat: |
5107 | 0 | llvm_unreachable("unexpected object file format"); |
5108 | 81.0k | case llvm::Triple::MachO: { |
5109 | 81.0k | if (MachOAttributes.empty()) |
5110 | 0 | return ("__DATA," + Section).str(); |
5111 | 81.0k | return ("__DATA," + Section + "," + MachOAttributes).str(); |
5112 | 81.0k | } |
5113 | 248 | case llvm::Triple::ELF: |
5114 | 248 | assert(Section.substr(0, 2) == "__" && |
5115 | 248 | "expected the name to begin with __"); |
5116 | 248 | return Section.substr(2).str(); |
5117 | 313 | case llvm::Triple::COFF: |
5118 | 313 | assert(Section.substr(0, 2) == "__" && |
5119 | 313 | "expected the name to begin with __"); |
5120 | 313 | return ("." + Section.substr(2) + "$B").str(); |
5121 | 0 | case llvm::Triple::Wasm: |
5122 | 0 | case llvm::Triple::GOFF: |
5123 | 0 | case llvm::Triple::XCOFF: |
5124 | 0 | llvm::report_fatal_error( |
5125 | 0 | "Objective-C support is unimplemented for object file format"); |
5126 | 0 | } |
5127 | | |
5128 | 0 | llvm_unreachable("Unhandled llvm::Triple::ObjectFormatType enum"); |
5129 | 0 | } |
5130 | | |
5131 | | /// EmitImageInfo - Emit the image info marker used to encode some module |
5132 | | /// level information. |
5133 | | /// |
5134 | | /// See: <rdr://4810609&4810587&4810587> |
5135 | | /// struct IMAGE_INFO { |
5136 | | /// unsigned version; |
5137 | | /// unsigned flags; |
5138 | | /// }; |
5139 | | enum ImageInfoFlags { |
5140 | | eImageInfo_FixAndContinue = (1 << 0), // This flag is no longer set by clang. |
5141 | | eImageInfo_GarbageCollected = (1 << 1), |
5142 | | eImageInfo_GCOnly = (1 << 2), |
5143 | | eImageInfo_OptimizedByDyld = (1 << 3), // This flag is set by the dyld shared cache. |
5144 | | |
5145 | | // A flag indicating that the module has no instances of a @synthesize of a |
5146 | | // superclass variable. <rdar://problem/6803242> |
5147 | | eImageInfo_CorrectedSynthesize = (1 << 4), // This flag is no longer set by clang. |
5148 | | eImageInfo_ImageIsSimulated = (1 << 5), |
5149 | | eImageInfo_ClassProperties = (1 << 6) |
5150 | | }; |
5151 | | |
5152 | 12.4k | void CGObjCCommonMac::EmitImageInfo() { |
5153 | 12.4k | unsigned version = 0; // Version is unused? |
5154 | 12.4k | std::string Section = |
5155 | 12.4k | (ObjCABI == 1) |
5156 | 167 | ? "__OBJC,__image_info,regular" |
5157 | 12.3k | : GetSectionName("__objc_imageinfo", "regular,no_dead_strip"); |
5158 | | |
5159 | | // Generate module-level named metadata to convey this information to the |
5160 | | // linker and code-gen. |
5161 | 12.4k | llvm::Module &Mod = CGM.getModule(); |
5162 | | |
5163 | | // Add the ObjC ABI version to the module flags. |
5164 | 12.4k | Mod.addModuleFlag(llvm::Module::Error, "Objective-C Version", ObjCABI); |
5165 | 12.4k | Mod.addModuleFlag(llvm::Module::Error, "Objective-C Image Info Version", |
5166 | 12.4k | version); |
5167 | 12.4k | Mod.addModuleFlag(llvm::Module::Error, "Objective-C Image Info Section", |
5168 | 12.4k | llvm::MDString::get(VMContext, Section)); |
5169 | | |
5170 | 12.4k | auto Int8Ty = llvm::Type::getInt8Ty(VMContext); |
5171 | 12.4k | if (CGM.getLangOpts().getGC() == LangOptions::NonGC) { |
5172 | | // Non-GC overrides those files which specify GC. |
5173 | 12.3k | Mod.addModuleFlag(llvm::Module::Error, |
5174 | 12.3k | "Objective-C Garbage Collection", |
5175 | 12.3k | llvm::ConstantInt::get(Int8Ty,0)); |
5176 | 70 | } else { |
5177 | | // Add the ObjC garbage collection value. |
5178 | 70 | Mod.addModuleFlag(llvm::Module::Error, |
5179 | 70 | "Objective-C Garbage Collection", |
5180 | 70 | llvm::ConstantInt::get(Int8Ty, |
5181 | 70 | (uint8_t)eImageInfo_GarbageCollected)); |
5182 | | |
5183 | 70 | if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) { |
5184 | | // Add the ObjC GC Only value. |
5185 | 3 | Mod.addModuleFlag(llvm::Module::Error, "Objective-C GC Only", |
5186 | 3 | eImageInfo_GCOnly); |
5187 | | |
5188 | | // Require that GC be specified and set to eImageInfo_GarbageCollected. |
5189 | 3 | llvm::Metadata *Ops[2] = { |
5190 | 3 | llvm::MDString::get(VMContext, "Objective-C Garbage Collection"), |
5191 | 3 | llvm::ConstantAsMetadata::get(llvm::ConstantInt::get( |
5192 | 3 | Int8Ty, eImageInfo_GarbageCollected))}; |
5193 | 3 | Mod.addModuleFlag(llvm::Module::Require, "Objective-C GC Only", |
5194 | 3 | llvm::MDNode::get(VMContext, Ops)); |
5195 | 3 | } |
5196 | 70 | } |
5197 | | |
5198 | | // Indicate whether we're compiling this to run on a simulator. |
5199 | 12.4k | if (CGM.getTarget().getTriple().isSimulatorEnvironment()) |
5200 | 2 | Mod.addModuleFlag(llvm::Module::Error, "Objective-C Is Simulated", |
5201 | 2 | eImageInfo_ImageIsSimulated); |
5202 | | |
5203 | | // Indicate whether we are generating class properties. |
5204 | 12.4k | Mod.addModuleFlag(llvm::Module::Error, "Objective-C Class Properties", |
5205 | 12.4k | eImageInfo_ClassProperties); |
5206 | 12.4k | } |
5207 | | |
5208 | | // struct objc_module { |
5209 | | // unsigned long version; |
5210 | | // unsigned long size; |
5211 | | // const char *name; |
5212 | | // Symtab symtab; |
5213 | | // }; |
5214 | | |
5215 | | // FIXME: Get from somewhere |
5216 | | static const int ModuleVersion = 7; |
5217 | | |
5218 | 167 | void CGObjCMac::EmitModuleInfo() { |
5219 | 167 | uint64_t Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ModuleTy); |
5220 | | |
5221 | 167 | ConstantInitBuilder builder(CGM); |
5222 | 167 | auto values = builder.beginStruct(ObjCTypes.ModuleTy); |
5223 | 167 | values.addInt(ObjCTypes.LongTy, ModuleVersion); |
5224 | 167 | values.addInt(ObjCTypes.LongTy, Size); |
5225 | | // This used to be the filename, now it is unused. <rdr://4327263> |
5226 | 167 | values.add(GetClassName(StringRef(""))); |
5227 |