/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h
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1 | | //===- CallEvent.h - Wrapper for all function and method calls --*- C++ -*-===// |
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 | | /// \file This file defines CallEvent and its subclasses, which represent path- |
10 | | /// sensitive instances of different kinds of function and method calls |
11 | | /// (C, C++, and Objective-C). |
12 | | // |
13 | | //===----------------------------------------------------------------------===// |
14 | | |
15 | | #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_CALLEVENT_H |
16 | | #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_CALLEVENT_H |
17 | | |
18 | | #include "clang/AST/Decl.h" |
19 | | #include "clang/AST/DeclBase.h" |
20 | | #include "clang/AST/DeclCXX.h" |
21 | | #include "clang/AST/DeclObjC.h" |
22 | | #include "clang/AST/Expr.h" |
23 | | #include "clang/AST/ExprCXX.h" |
24 | | #include "clang/AST/ExprObjC.h" |
25 | | #include "clang/AST/Stmt.h" |
26 | | #include "clang/AST/Type.h" |
27 | | #include "clang/Basic/IdentifierTable.h" |
28 | | #include "clang/Basic/LLVM.h" |
29 | | #include "clang/Basic/SourceLocation.h" |
30 | | #include "clang/Basic/SourceManager.h" |
31 | | #include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h" |
32 | | #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h" |
33 | | #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState_Fwd.h" |
34 | | #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h" |
35 | | #include "llvm/ADT/ArrayRef.h" |
36 | | #include "llvm/ADT/IntrusiveRefCntPtr.h" |
37 | | #include "llvm/ADT/PointerIntPair.h" |
38 | | #include "llvm/ADT/PointerUnion.h" |
39 | | #include "llvm/ADT/STLExtras.h" |
40 | | #include "llvm/ADT/SmallVector.h" |
41 | | #include "llvm/ADT/StringRef.h" |
42 | | #include "llvm/ADT/iterator_range.h" |
43 | | #include "llvm/Support/Allocator.h" |
44 | | #include "llvm/Support/Casting.h" |
45 | | #include "llvm/Support/ErrorHandling.h" |
46 | | #include <cassert> |
47 | | #include <limits> |
48 | | #include <utility> |
49 | | |
50 | | namespace clang { |
51 | | |
52 | | class LocationContext; |
53 | | class ProgramPoint; |
54 | | class ProgramPointTag; |
55 | | class StackFrameContext; |
56 | | |
57 | | namespace ento { |
58 | | |
59 | | enum CallEventKind { |
60 | | CE_Function, |
61 | | CE_CXXMember, |
62 | | CE_CXXMemberOperator, |
63 | | CE_CXXDestructor, |
64 | | CE_BEG_CXX_INSTANCE_CALLS = CE_CXXMember, |
65 | | CE_END_CXX_INSTANCE_CALLS = CE_CXXDestructor, |
66 | | CE_CXXConstructor, |
67 | | CE_CXXInheritedConstructor, |
68 | | CE_BEG_CXX_CONSTRUCTOR_CALLS = CE_CXXConstructor, |
69 | | CE_END_CXX_CONSTRUCTOR_CALLS = CE_CXXInheritedConstructor, |
70 | | CE_CXXAllocator, |
71 | | CE_CXXDeallocator, |
72 | | CE_BEG_FUNCTION_CALLS = CE_Function, |
73 | | CE_END_FUNCTION_CALLS = CE_CXXDeallocator, |
74 | | CE_Block, |
75 | | CE_ObjCMessage |
76 | | }; |
77 | | |
78 | | class CallEvent; |
79 | | |
80 | | template<typename T = CallEvent> |
81 | | class CallEventRef : public IntrusiveRefCntPtr<const T> { |
82 | | public: |
83 | 1.36M | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} clang::ento::CallEventRef<clang::ento::ObjCMethodCall>::CallEventRef(clang::ento::ObjCMethodCall const*) Line | Count | Source | 83 | 29.0k | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CallEvent>::CallEventRef(clang::ento::CallEvent const*) Line | Count | Source | 83 | 1.28M | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CXXConstructorCall>::CallEventRef(clang::ento::CXXConstructorCall const*) Line | Count | Source | 83 | 42.0k | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CXXInheritedConstructorCall>::CallEventRef(clang::ento::CXXInheritedConstructorCall const*) Line | Count | Source | 83 | 13 | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CXXDestructorCall>::CallEventRef(clang::ento::CXXDestructorCall const*) Line | Count | Source | 83 | 3.03k | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CXXAllocatorCall>::CallEventRef(clang::ento::CXXAllocatorCall const*) Line | Count | Source | 83 | 3.11k | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
clang::ento::CallEventRef<clang::ento::CXXDeallocatorCall>::CallEventRef(clang::ento::CXXDeallocatorCall const*) Line | Count | Source | 83 | 493 | CallEventRef(const T *Call) : IntrusiveRefCntPtr<const T>(Call) {} |
|
84 | 72.4k | CallEventRef(const CallEventRef &Orig) : IntrusiveRefCntPtr<const T>(Orig) {} |
85 | | |
86 | 44.8k | CallEventRef<T> cloneWithState(ProgramStateRef State) const { |
87 | 44.8k | return this->get()->template cloneWithState<T>(State); |
88 | 44.8k | } clang::ento::CallEventRef<clang::ento::CallEvent>::cloneWithState(llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) const Line | Count | Source | 86 | 40.8k | CallEventRef<T> cloneWithState(ProgramStateRef State) const { | 87 | 40.8k | return this->get()->template cloneWithState<T>(State); | 88 | 40.8k | } |
clang::ento::CallEventRef<clang::ento::ObjCMethodCall>::cloneWithState(llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) const Line | Count | Source | 86 | 4.09k | CallEventRef<T> cloneWithState(ProgramStateRef State) const { | 87 | 4.09k | return this->get()->template cloneWithState<T>(State); | 88 | 4.09k | } |
|
89 | | |
90 | | // Allow implicit conversions to a superclass type, since CallEventRef |
91 | | // behaves like a pointer-to-const. |
92 | | template <typename SuperT> |
93 | 46.2k | operator CallEventRef<SuperT> () const { |
94 | 46.2k | return this->get(); |
95 | 46.2k | } clang::ento::CallEventRef<clang::ento::CXXDestructorCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 1.48k | operator CallEventRef<SuperT> () const { | 94 | 1.48k | return this->get(); | 95 | 1.48k | } |
clang::ento::CallEventRef<clang::ento::CXXAllocatorCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 833 | operator CallEventRef<SuperT> () const { | 94 | 833 | return this->get(); | 95 | 833 | } |
clang::ento::CallEventRef<clang::ento::CXXDeallocatorCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 6 | operator CallEventRef<SuperT> () const { | 94 | 6 | return this->get(); | 95 | 6 | } |
clang::ento::CallEventRef<clang::ento::CXXConstructorCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 42.0k | operator CallEventRef<SuperT> () const { | 94 | 42.0k | return this->get(); | 95 | 42.0k | } |
clang::ento::CallEventRef<clang::ento::ObjCMethodCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 1.91k | operator CallEventRef<SuperT> () const { | 94 | 1.91k | return this->get(); | 95 | 1.91k | } |
clang::ento::CallEventRef<clang::ento::CXXInheritedConstructorCall>::operator clang::ento::CallEventRef<clang::ento::CallEvent><clang::ento::CallEvent>() const Line | Count | Source | 93 | 13 | operator CallEventRef<SuperT> () const { | 94 | 13 | return this->get(); | 95 | 13 | } |
|
96 | | }; |
97 | | |
98 | | /// \class RuntimeDefinition |
99 | | /// Defines the runtime definition of the called function. |
100 | | /// |
101 | | /// Encapsulates the information we have about which Decl will be used |
102 | | /// when the call is executed on the given path. When dealing with dynamic |
103 | | /// dispatch, the information is based on DynamicTypeInfo and might not be |
104 | | /// precise. |
105 | | class RuntimeDefinition { |
106 | | /// The Declaration of the function which could be called at runtime. |
107 | | /// NULL if not available. |
108 | | const Decl *D = nullptr; |
109 | | |
110 | | /// The region representing an object (ObjC/C++) on which the method is |
111 | | /// called. With dynamic dispatch, the method definition depends on the |
112 | | /// runtime type of this object. NULL when the DynamicTypeInfo is |
113 | | /// precise. |
114 | | const MemRegion *R = nullptr; |
115 | | |
116 | | public: |
117 | 28.0k | RuntimeDefinition() = default; |
118 | 38.1k | RuntimeDefinition(const Decl *InD): D(InD) {} |
119 | 2.81k | RuntimeDefinition(const Decl *InD, const MemRegion *InR): D(InD), R(InR) {} |
120 | | |
121 | 69.0k | const Decl *getDecl() { return D; } |
122 | | |
123 | | /// Check if the definition we have is precise. |
124 | | /// If not, it is possible that the call dispatches to another definition at |
125 | | /// execution time. |
126 | 34.8k | bool mayHaveOtherDefinitions() { return R != nullptr; } |
127 | | |
128 | | /// When other definitions are possible, returns the region whose runtime type |
129 | | /// determines the method definition. |
130 | 15 | const MemRegion *getDispatchRegion() { return R; } |
131 | | }; |
132 | | |
133 | | /// Represents an abstract call to a function or method along a |
134 | | /// particular path. |
135 | | /// |
136 | | /// CallEvents are created through the factory methods of CallEventManager. |
137 | | /// |
138 | | /// CallEvents should always be cheap to create and destroy. In order for |
139 | | /// CallEventManager to be able to re-use CallEvent-sized memory blocks, |
140 | | /// subclasses of CallEvent may not add any data members to the base class. |
141 | | /// Use the "Data" and "Location" fields instead. |
142 | | class CallEvent { |
143 | | public: |
144 | | using Kind = CallEventKind; |
145 | | |
146 | | private: |
147 | | ProgramStateRef State; |
148 | | const LocationContext *LCtx; |
149 | | llvm::PointerUnion<const Expr *, const Decl *> Origin; |
150 | | |
151 | | protected: |
152 | | // This is user data for subclasses. |
153 | | const void *Data; |
154 | | |
155 | | // This is user data for subclasses. |
156 | | // This should come right before RefCount, so that the two fields can be |
157 | | // packed together on LP64 platforms. |
158 | | SourceLocation Location; |
159 | | |
160 | | private: |
161 | | template <typename T> friend struct llvm::IntrusiveRefCntPtrInfo; |
162 | | |
163 | | mutable unsigned RefCount = 0; |
164 | | |
165 | 1.41M | void Retain() const { ++RefCount; } |
166 | | void Release() const; |
167 | | |
168 | | protected: |
169 | | friend class CallEventManager; |
170 | | |
171 | | CallEvent(const Expr *E, ProgramStateRef state, const LocationContext *lctx) |
172 | 206k | : State(std::move(state)), LCtx(lctx), Origin(E) {} |
173 | | |
174 | | CallEvent(const Decl *D, ProgramStateRef state, const LocationContext *lctx) |
175 | 3.03k | : State(std::move(state)), LCtx(lctx), Origin(D) {} |
176 | | |
177 | | // DO NOT MAKE PUBLIC |
178 | | CallEvent(const CallEvent &Original) |
179 | | : State(Original.State), LCtx(Original.LCtx), Origin(Original.Origin), |
180 | 286k | Data(Original.Data), Location(Original.Location) {} |
181 | | |
182 | | /// Copies this CallEvent, with vtable intact, into a new block of memory. |
183 | | virtual void cloneTo(void *Dest) const = 0; |
184 | | |
185 | | /// Get the value of arbitrary expressions at this point in the path. |
186 | 456k | SVal getSVal(const Stmt *S) const { |
187 | 456k | return getState()->getSVal(S, getLocationContext()); |
188 | 456k | } |
189 | | |
190 | | using ValueList = SmallVectorImpl<SVal>; |
191 | | |
192 | | /// Used to specify non-argument regions that will be invalidated as a |
193 | | /// result of this call. |
194 | | virtual void getExtraInvalidatedValues(ValueList &Values, |
195 | 23.0k | RegionAndSymbolInvalidationTraits *ETraits) const {} |
196 | | |
197 | | public: |
198 | | CallEvent &operator=(const CallEvent &) = delete; |
199 | 496k | virtual ~CallEvent() = default; |
200 | | |
201 | | /// Returns the kind of call this is. |
202 | | virtual Kind getKind() const = 0; |
203 | | virtual StringRef getKindAsString() const = 0; |
204 | | |
205 | | /// Returns the declaration of the function or method that will be |
206 | | /// called. May be null. |
207 | 45.3k | virtual const Decl *getDecl() const { |
208 | 45.3k | return Origin.dyn_cast<const Decl *>(); |
209 | 45.3k | } |
210 | | |
211 | | /// The state in which the call is being evaluated. |
212 | 695k | const ProgramStateRef &getState() const { |
213 | 695k | return State; |
214 | 695k | } |
215 | | |
216 | | /// The context in which the call is being evaluated. |
217 | 1.74M | const LocationContext *getLocationContext() const { |
218 | 1.74M | return LCtx; |
219 | 1.74M | } |
220 | | |
221 | | /// Returns the definition of the function or method that will be |
222 | | /// called. |
223 | | virtual RuntimeDefinition getRuntimeDefinition() const = 0; |
224 | | |
225 | | /// Returns the expression whose value will be the result of this call. |
226 | | /// May be null. |
227 | 13.1M | virtual const Expr *getOriginExpr() const { |
228 | 13.1M | return Origin.dyn_cast<const Expr *>(); |
229 | 13.1M | } |
230 | | |
231 | | /// Returns the number of arguments (explicit and implicit). |
232 | | /// |
233 | | /// Note that this may be greater than the number of parameters in the |
234 | | /// callee's declaration, and that it may include arguments not written in |
235 | | /// the source. |
236 | | virtual unsigned getNumArgs() const = 0; |
237 | | |
238 | | /// Returns true if the callee is known to be from a system header. |
239 | 42.3k | bool isInSystemHeader() const { |
240 | 42.3k | const Decl *D = getDecl(); |
241 | 42.3k | if (!D) |
242 | 88 | return false; |
243 | | |
244 | 42.2k | SourceLocation Loc = D->getLocation(); |
245 | 42.2k | if (Loc.isValid()) { |
246 | 41.7k | const SourceManager &SM = |
247 | 41.7k | getState()->getStateManager().getContext().getSourceManager(); |
248 | 41.7k | return SM.isInSystemHeader(D->getLocation()); |
249 | 41.7k | } |
250 | | |
251 | | // Special case for implicitly-declared global operator new/delete. |
252 | | // These should be considered system functions. |
253 | 511 | if (const auto *FD = dyn_cast<FunctionDecl>(D)) |
254 | 511 | return FD->isOverloadedOperator() && FD->isImplicit()510 && FD->isGlobal()510 ; |
255 | | |
256 | 0 | return false; |
257 | 511 | } |
258 | | |
259 | | /// Returns a source range for the entire call, suitable for |
260 | | /// outputting in diagnostics. |
261 | 68 | virtual SourceRange getSourceRange() const { |
262 | 68 | return getOriginExpr()->getSourceRange(); |
263 | 68 | } |
264 | | |
265 | | /// Returns the value of a given argument at the time of the call. |
266 | | virtual SVal getArgSVal(unsigned Index) const; |
267 | | |
268 | | /// Returns the expression associated with a given argument. |
269 | | /// May be null if this expression does not appear in the source. |
270 | 0 | virtual const Expr *getArgExpr(unsigned Index) const { return nullptr; } |
271 | | |
272 | | /// Returns the source range for errors associated with this argument. |
273 | | /// |
274 | | /// May be invalid if the argument is not written in the source. |
275 | | virtual SourceRange getArgSourceRange(unsigned Index) const; |
276 | | |
277 | | /// Returns the result type, adjusted for references. |
278 | | QualType getResultType() const; |
279 | | |
280 | | /// Returns the return value of the call. |
281 | | /// |
282 | | /// This should only be called if the CallEvent was created using a state in |
283 | | /// which the return value has already been bound to the origin expression. |
284 | | SVal getReturnValue() const; |
285 | | |
286 | | /// Returns true if the type of any of the non-null arguments satisfies |
287 | | /// the condition. |
288 | | bool hasNonNullArgumentsWithType(bool (*Condition)(QualType)) const; |
289 | | |
290 | | /// Returns true if any of the arguments appear to represent callbacks. |
291 | | bool hasNonZeroCallbackArg() const; |
292 | | |
293 | | /// Returns true if any of the arguments is void*. |
294 | | bool hasVoidPointerToNonConstArg() const; |
295 | | |
296 | | /// Returns true if any of the arguments are known to escape to long- |
297 | | /// term storage, even if this method will not modify them. |
298 | | // NOTE: The exact semantics of this are still being defined! |
299 | | // We don't really want a list of hardcoded exceptions in the long run, |
300 | | // but we don't want duplicated lists of known APIs in the short term either. |
301 | 34.1k | virtual bool argumentsMayEscape() const { |
302 | 34.1k | return hasNonZeroCallbackArg(); |
303 | 34.1k | } |
304 | | |
305 | | /// Returns true if the callee is an externally-visible function in the |
306 | | /// top-level namespace, such as \c malloc. |
307 | | /// |
308 | | /// You can use this call to determine that a particular function really is |
309 | | /// a library function and not, say, a C++ member function with the same name. |
310 | | /// |
311 | | /// If a name is provided, the function must additionally match the given |
312 | | /// name. |
313 | | /// |
314 | | /// Note that this deliberately excludes C++ library functions in the \c std |
315 | | /// namespace, but will include C library functions accessed through the |
316 | | /// \c std namespace. This also does not check if the function is declared |
317 | | /// as 'extern "C"', or if it uses C++ name mangling. |
318 | | // FIXME: Add a helper for checking namespaces. |
319 | | // FIXME: Move this down to AnyFunctionCall once checkers have more |
320 | | // precise callbacks. |
321 | | bool isGlobalCFunction(StringRef SpecificName = StringRef()) const; |
322 | | |
323 | | /// Returns the name of the callee, if its name is a simple identifier. |
324 | | /// |
325 | | /// Note that this will fail for Objective-C methods, blocks, and C++ |
326 | | /// overloaded operators. The former is named by a Selector rather than a |
327 | | /// simple identifier, and the latter two do not have names. |
328 | | // FIXME: Move this down to AnyFunctionCall once checkers have more |
329 | | // precise callbacks. |
330 | 61.5k | const IdentifierInfo *getCalleeIdentifier() const { |
331 | 61.5k | const auto *ND = dyn_cast_or_null<NamedDecl>(getDecl()); |
332 | 61.5k | if (!ND) |
333 | 5 | return nullptr; |
334 | 61.5k | return ND->getIdentifier(); |
335 | 61.5k | } |
336 | | |
337 | | /// Returns an appropriate ProgramPoint for this call. |
338 | | ProgramPoint getProgramPoint(bool IsPreVisit = false, |
339 | | const ProgramPointTag *Tag = nullptr) const; |
340 | | |
341 | | /// Returns a new state with all argument regions invalidated. |
342 | | /// |
343 | | /// This accepts an alternate state in case some processing has already |
344 | | /// occurred. |
345 | | ProgramStateRef invalidateRegions(unsigned BlockCount, |
346 | | ProgramStateRef Orig = nullptr) const; |
347 | | |
348 | | using FrameBindingTy = std::pair<SVal, SVal>; |
349 | | using BindingsTy = SmallVectorImpl<FrameBindingTy>; |
350 | | |
351 | | /// Populates the given SmallVector with the bindings in the callee's stack |
352 | | /// frame at the start of this call. |
353 | | virtual void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
354 | | BindingsTy &Bindings) const = 0; |
355 | | |
356 | | /// Returns a copy of this CallEvent, but using the given state. |
357 | | template <typename T> |
358 | | CallEventRef<T> cloneWithState(ProgramStateRef NewState) const; |
359 | | |
360 | | /// Returns a copy of this CallEvent, but using the given state. |
361 | 1.02M | CallEventRef<> cloneWithState(ProgramStateRef NewState) const { |
362 | 1.02M | return cloneWithState<CallEvent>(NewState); |
363 | 1.02M | } |
364 | | |
365 | | /// Returns true if this is a statement is a function or method call |
366 | | /// of some kind. |
367 | | static bool isCallStmt(const Stmt *S); |
368 | | |
369 | | /// Returns the result type of a function or method declaration. |
370 | | /// |
371 | | /// This will return a null QualType if the result type cannot be determined. |
372 | | static QualType getDeclaredResultType(const Decl *D); |
373 | | |
374 | | /// Returns true if the given decl is known to be variadic. |
375 | | /// |
376 | | /// \p D must not be null. |
377 | | static bool isVariadic(const Decl *D); |
378 | | |
379 | | /// Returns AnalysisDeclContext for the callee stack frame. |
380 | | /// Currently may fail; returns null on failure. |
381 | | AnalysisDeclContext *getCalleeAnalysisDeclContext() const; |
382 | | |
383 | | /// Returns the callee stack frame. That stack frame will only be entered |
384 | | /// during analysis if the call is inlined, but it may still be useful |
385 | | /// in intermediate calculations even if the call isn't inlined. |
386 | | /// May fail; returns null on failure. |
387 | | const StackFrameContext *getCalleeStackFrame(unsigned BlockCount) const; |
388 | | |
389 | | /// Returns memory location for a parameter variable within the callee stack |
390 | | /// frame. The behavior is undefined if the block count is different from the |
391 | | /// one that is there when call happens. May fail; returns null on failure. |
392 | | const ParamVarRegion *getParameterLocation(unsigned Index, |
393 | | unsigned BlockCount) const; |
394 | | |
395 | | /// Returns true if on the current path, the argument was constructed by |
396 | | /// calling a C++ constructor over it. This is an internal detail of the |
397 | | /// analysis which doesn't necessarily represent the program semantics: |
398 | | /// if we are supposed to construct an argument directly, we may still |
399 | | /// not do that because we don't know how (i.e., construction context is |
400 | | /// unavailable in the CFG or not supported by the analyzer). |
401 | 55.3k | bool isArgumentConstructedDirectly(unsigned Index) const { |
402 | | // This assumes that the object was not yet removed from the state. |
403 | 55.3k | return ExprEngine::getObjectUnderConstruction( |
404 | 55.3k | getState(), {getOriginExpr(), Index}, getLocationContext()).hasValue(); |
405 | 55.3k | } |
406 | | |
407 | | /// Some calls have parameter numbering mismatched from argument numbering. |
408 | | /// This function converts an argument index to the corresponding |
409 | | /// parameter index. Returns None is the argument doesn't correspond |
410 | | /// to any parameter variable. |
411 | | virtual Optional<unsigned> |
412 | 21.4k | getAdjustedParameterIndex(unsigned ASTArgumentIndex) const { |
413 | 21.4k | return ASTArgumentIndex; |
414 | 21.4k | } |
415 | | |
416 | | /// Some call event sub-classes conveniently adjust mismatching AST indices |
417 | | /// to match parameter indices. This function converts an argument index |
418 | | /// as understood by CallEvent to the argument index as understood by the AST. |
419 | 120k | virtual unsigned getASTArgumentIndex(unsigned CallArgumentIndex) const { |
420 | 120k | return CallArgumentIndex; |
421 | 120k | } |
422 | | |
423 | | /// Returns the construction context of the call, if it is a C++ constructor |
424 | | /// call or a call of a function returning a C++ class instance. Otherwise |
425 | | /// return nullptr. |
426 | | const ConstructionContext *getConstructionContext() const; |
427 | | |
428 | | /// If the call returns a C++ record type then the region of its return value |
429 | | /// can be retrieved from its construction context. |
430 | | Optional<SVal> getReturnValueUnderConstruction() const; |
431 | | |
432 | | // Iterator access to formal parameters and their types. |
433 | | private: |
434 | | struct GetTypeFn { |
435 | 81.9k | QualType operator()(ParmVarDecl *PD) const { return PD->getType(); } |
436 | | }; |
437 | | |
438 | | public: |
439 | | /// Return call's formal parameters. |
440 | | /// |
441 | | /// Remember that the number of formal parameters may not match the number |
442 | | /// of arguments for all calls. However, the first parameter will always |
443 | | /// correspond with the argument value returned by \c getArgSVal(0). |
444 | | virtual ArrayRef<ParmVarDecl *> parameters() const = 0; |
445 | | |
446 | | using param_type_iterator = |
447 | | llvm::mapped_iterator<ArrayRef<ParmVarDecl *>::iterator, GetTypeFn>; |
448 | | |
449 | | /// Returns an iterator over the types of the call's formal parameters. |
450 | | /// |
451 | | /// This uses the callee decl found by default name lookup rather than the |
452 | | /// definition because it represents a public interface, and probably has |
453 | | /// more annotations. |
454 | 101k | param_type_iterator param_type_begin() const { |
455 | 101k | return llvm::map_iterator(parameters().begin(), GetTypeFn()); |
456 | 101k | } |
457 | | /// \sa param_type_begin() |
458 | 101k | param_type_iterator param_type_end() const { |
459 | 101k | return llvm::map_iterator(parameters().end(), GetTypeFn()); |
460 | 101k | } |
461 | | |
462 | | // For debugging purposes only |
463 | | void dump(raw_ostream &Out) const; |
464 | | void dump() const; |
465 | | }; |
466 | | |
467 | | /// Represents a call to any sort of function that might have a |
468 | | /// FunctionDecl. |
469 | | class AnyFunctionCall : public CallEvent { |
470 | | protected: |
471 | | AnyFunctionCall(const Expr *E, ProgramStateRef St, |
472 | | const LocationContext *LCtx) |
473 | 199k | : CallEvent(E, St, LCtx) {} |
474 | | AnyFunctionCall(const Decl *D, ProgramStateRef St, |
475 | | const LocationContext *LCtx) |
476 | 3.03k | : CallEvent(D, St, LCtx) {} |
477 | 254k | AnyFunctionCall(const AnyFunctionCall &Other) = default; |
478 | | |
479 | | public: |
480 | | // This function is overridden by subclasses, but they must return |
481 | | // a FunctionDecl. |
482 | 45.3k | const FunctionDecl *getDecl() const override { |
483 | 45.3k | return cast<FunctionDecl>(CallEvent::getDecl()); |
484 | 45.3k | } |
485 | | |
486 | | RuntimeDefinition getRuntimeDefinition() const override; |
487 | | |
488 | | bool argumentsMayEscape() const override; |
489 | | |
490 | | void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
491 | | BindingsTy &Bindings) const override; |
492 | | |
493 | | ArrayRef<ParmVarDecl *> parameters() const override; |
494 | | |
495 | 123k | static bool classof(const CallEvent *CA) { |
496 | 123k | return CA->getKind() >= CE_BEG_FUNCTION_CALLS && |
497 | 123k | CA->getKind() <= CE_END_FUNCTION_CALLS; |
498 | 123k | } |
499 | | }; |
500 | | |
501 | | /// Represents a C function or static C++ member function call. |
502 | | /// |
503 | | /// Example: \c fun() |
504 | | class SimpleFunctionCall : public AnyFunctionCall { |
505 | | friend class CallEventManager; |
506 | | |
507 | | protected: |
508 | | SimpleFunctionCall(const CallExpr *CE, ProgramStateRef St, |
509 | | const LocationContext *LCtx) |
510 | 125k | : AnyFunctionCall(CE, St, LCtx) {} |
511 | 138k | SimpleFunctionCall(const SimpleFunctionCall &Other) = default; |
512 | | |
513 | 138k | void cloneTo(void *Dest) const override { |
514 | 138k | new (Dest) SimpleFunctionCall(*this); |
515 | 138k | } |
516 | | |
517 | | public: |
518 | 8.61M | const CallExpr *getOriginExpr() const override { |
519 | 8.61M | return cast<CallExpr>(AnyFunctionCall::getOriginExpr()); |
520 | 8.61M | } |
521 | | |
522 | | const FunctionDecl *getDecl() const override; |
523 | | |
524 | 2.13M | unsigned getNumArgs() const override { return getOriginExpr()->getNumArgs(); } |
525 | | |
526 | 375k | const Expr *getArgExpr(unsigned Index) const override { |
527 | 375k | return getOriginExpr()->getArg(Index); |
528 | 375k | } |
529 | | |
530 | 2.91M | Kind getKind() const override { return CE_Function; } |
531 | 50 | StringRef getKindAsString() const override { return "SimpleFunctionCall"; } |
532 | | |
533 | 3.23k | static bool classof(const CallEvent *CA) { |
534 | 3.23k | return CA->getKind() == CE_Function; |
535 | 3.23k | } |
536 | | }; |
537 | | |
538 | | /// Represents a call to a block. |
539 | | /// |
540 | | /// Example: <tt>^{ statement-body }()</tt> |
541 | | class BlockCall : public CallEvent { |
542 | | friend class CallEventManager; |
543 | | |
544 | | protected: |
545 | | BlockCall(const CallExpr *CE, ProgramStateRef St, |
546 | | const LocationContext *LCtx) |
547 | 591 | : CallEvent(CE, St, LCtx) {} |
548 | 231 | BlockCall(const BlockCall &Other) = default; |
549 | | |
550 | 231 | void cloneTo(void *Dest) const override { new (Dest) BlockCall(*this); } |
551 | | |
552 | | void getExtraInvalidatedValues(ValueList &Values, |
553 | | RegionAndSymbolInvalidationTraits *ETraits) const override; |
554 | | |
555 | | public: |
556 | 7.62k | const CallExpr *getOriginExpr() const override { |
557 | 7.62k | return cast<CallExpr>(CallEvent::getOriginExpr()); |
558 | 7.62k | } |
559 | | |
560 | 1.21k | unsigned getNumArgs() const override { return getOriginExpr()->getNumArgs(); } |
561 | | |
562 | 401 | const Expr *getArgExpr(unsigned Index) const override { |
563 | 401 | return getOriginExpr()->getArg(Index); |
564 | 401 | } |
565 | | |
566 | | /// Returns the region associated with this instance of the block. |
567 | | /// |
568 | | /// This may be NULL if the block's origin is unknown. |
569 | | const BlockDataRegion *getBlockRegion() const; |
570 | | |
571 | 3.01k | const BlockDecl *getDecl() const override { |
572 | 3.01k | const BlockDataRegion *BR = getBlockRegion(); |
573 | 3.01k | if (!BR) |
574 | 124 | return nullptr; |
575 | 2.89k | return BR->getDecl(); |
576 | 3.01k | } |
577 | | |
578 | 569 | bool isConversionFromLambda() const { |
579 | 569 | const BlockDecl *BD = getDecl(); |
580 | 569 | if (!BD) |
581 | 10 | return false; |
582 | | |
583 | 559 | return BD->isConversionFromLambda(); |
584 | 569 | } |
585 | | |
586 | | /// For a block converted from a C++ lambda, returns the block |
587 | | /// VarRegion for the variable holding the captured C++ lambda record. |
588 | 14 | const VarRegion *getRegionStoringCapturedLambda() const { |
589 | 14 | assert(isConversionFromLambda()); |
590 | 0 | const BlockDataRegion *BR = getBlockRegion(); |
591 | 14 | assert(BR && "Block converted from lambda must have a block region"); |
592 | | |
593 | 0 | auto I = BR->referenced_vars_begin(); |
594 | 14 | assert(I != BR->referenced_vars_end()); |
595 | | |
596 | 0 | return I.getCapturedRegion(); |
597 | 14 | } |
598 | | |
599 | 197 | RuntimeDefinition getRuntimeDefinition() const override { |
600 | 197 | if (!isConversionFromLambda()) |
601 | 190 | return RuntimeDefinition(getDecl()); |
602 | | |
603 | | // Clang converts lambdas to blocks with an implicit user-defined |
604 | | // conversion operator method on the lambda record that looks (roughly) |
605 | | // like: |
606 | | // |
607 | | // typedef R(^block_type)(P1, P2, ...); |
608 | | // operator block_type() const { |
609 | | // auto Lambda = *this; |
610 | | // return ^(P1 p1, P2 p2, ...){ |
611 | | // /* return Lambda(p1, p2, ...); */ |
612 | | // }; |
613 | | // } |
614 | | // |
615 | | // Here R is the return type of the lambda and P1, P2, ... are |
616 | | // its parameter types. 'Lambda' is a fake VarDecl captured by the block |
617 | | // that is initialized to a copy of the lambda. |
618 | | // |
619 | | // Sema leaves the body of a lambda-converted block empty (it is |
620 | | // produced by CodeGen), so we can't analyze it directly. Instead, we skip |
621 | | // the block body and analyze the operator() method on the captured lambda. |
622 | 7 | const VarDecl *LambdaVD = getRegionStoringCapturedLambda()->getDecl(); |
623 | 7 | const CXXRecordDecl *LambdaDecl = LambdaVD->getType()->getAsCXXRecordDecl(); |
624 | 7 | CXXMethodDecl* LambdaCallOperator = LambdaDecl->getLambdaCallOperator(); |
625 | | |
626 | 7 | return RuntimeDefinition(LambdaCallOperator); |
627 | 197 | } |
628 | | |
629 | 18 | bool argumentsMayEscape() const override { |
630 | 18 | return true; |
631 | 18 | } |
632 | | |
633 | | void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
634 | | BindingsTy &Bindings) const override; |
635 | | |
636 | | ArrayRef<ParmVarDecl *> parameters() const override; |
637 | | |
638 | 3.26k | Kind getKind() const override { return CE_Block; } |
639 | 0 | StringRef getKindAsString() const override { return "BlockCall"; } |
640 | | |
641 | 2 | static bool classof(const CallEvent *CA) { return CA->getKind() == CE_Block; } |
642 | | }; |
643 | | |
644 | | /// Represents a non-static C++ member function call, no matter how |
645 | | /// it is written. |
646 | | class CXXInstanceCall : public AnyFunctionCall { |
647 | | protected: |
648 | | CXXInstanceCall(const CallExpr *CE, ProgramStateRef St, |
649 | | const LocationContext *LCtx) |
650 | 28.5k | : AnyFunctionCall(CE, St, LCtx) {} |
651 | | CXXInstanceCall(const FunctionDecl *D, ProgramStateRef St, |
652 | | const LocationContext *LCtx) |
653 | 3.03k | : AnyFunctionCall(D, St, LCtx) {} |
654 | 39.9k | CXXInstanceCall(const CXXInstanceCall &Other) = default; |
655 | | |
656 | | void getExtraInvalidatedValues(ValueList &Values, |
657 | | RegionAndSymbolInvalidationTraits *ETraits) const override; |
658 | | |
659 | | public: |
660 | | /// Returns the expression representing the implicit 'this' object. |
661 | 52 | virtual const Expr *getCXXThisExpr() const { return nullptr; } |
662 | | |
663 | | /// Returns the value of the implicit 'this' object. |
664 | | virtual SVal getCXXThisVal() const; |
665 | | |
666 | | const FunctionDecl *getDecl() const override; |
667 | | |
668 | | RuntimeDefinition getRuntimeDefinition() const override; |
669 | | |
670 | | void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
671 | | BindingsTy &Bindings) const override; |
672 | | |
673 | 317k | static bool classof(const CallEvent *CA) { |
674 | 317k | return CA->getKind() >= CE_BEG_CXX_INSTANCE_CALLS && |
675 | 317k | CA->getKind() <= CE_END_CXX_INSTANCE_CALLS134k ; |
676 | 317k | } |
677 | | }; |
678 | | |
679 | | /// Represents a non-static C++ member function call. |
680 | | /// |
681 | | /// Example: \c obj.fun() |
682 | | class CXXMemberCall : public CXXInstanceCall { |
683 | | friend class CallEventManager; |
684 | | |
685 | | protected: |
686 | | CXXMemberCall(const CXXMemberCallExpr *CE, ProgramStateRef St, |
687 | | const LocationContext *LCtx) |
688 | 19.4k | : CXXInstanceCall(CE, St, LCtx) {} |
689 | 27.2k | CXXMemberCall(const CXXMemberCall &Other) = default; |
690 | | |
691 | 27.2k | void cloneTo(void *Dest) const override { new (Dest) CXXMemberCall(*this); } |
692 | | |
693 | | public: |
694 | 1.51M | const CXXMemberCallExpr *getOriginExpr() const override { |
695 | 1.51M | return cast<CXXMemberCallExpr>(CXXInstanceCall::getOriginExpr()); |
696 | 1.51M | } |
697 | | |
698 | 371k | unsigned getNumArgs() const override { |
699 | 371k | if (const CallExpr *CE = getOriginExpr()) |
700 | 371k | return CE->getNumArgs(); |
701 | 0 | return 0; |
702 | 371k | } |
703 | | |
704 | 24.1k | const Expr *getArgExpr(unsigned Index) const override { |
705 | 24.1k | return getOriginExpr()->getArg(Index); |
706 | 24.1k | } |
707 | | |
708 | | const Expr *getCXXThisExpr() const override; |
709 | | |
710 | | RuntimeDefinition getRuntimeDefinition() const override; |
711 | | |
712 | 574k | Kind getKind() const override { return CE_CXXMember; } |
713 | 0 | StringRef getKindAsString() const override { return "CXXMemberCall"; } |
714 | | |
715 | 33.0k | static bool classof(const CallEvent *CA) { |
716 | 33.0k | return CA->getKind() == CE_CXXMember; |
717 | 33.0k | } |
718 | | }; |
719 | | |
720 | | /// Represents a C++ overloaded operator call where the operator is |
721 | | /// implemented as a non-static member function. |
722 | | /// |
723 | | /// Example: <tt>iter + 1</tt> |
724 | | class CXXMemberOperatorCall : public CXXInstanceCall { |
725 | | friend class CallEventManager; |
726 | | |
727 | | protected: |
728 | | CXXMemberOperatorCall(const CXXOperatorCallExpr *CE, ProgramStateRef St, |
729 | | const LocationContext *LCtx) |
730 | 9.03k | : CXXInstanceCall(CE, St, LCtx) {} |
731 | 9.36k | CXXMemberOperatorCall(const CXXMemberOperatorCall &Other) = default; |
732 | | |
733 | 9.36k | void cloneTo(void *Dest) const override { |
734 | 9.36k | new (Dest) CXXMemberOperatorCall(*this); |
735 | 9.36k | } |
736 | | |
737 | | public: |
738 | 366k | const CXXOperatorCallExpr *getOriginExpr() const override { |
739 | 366k | return cast<CXXOperatorCallExpr>(CXXInstanceCall::getOriginExpr()); |
740 | 366k | } |
741 | | |
742 | 68.5k | unsigned getNumArgs() const override { |
743 | 68.5k | return getOriginExpr()->getNumArgs() - 1; |
744 | 68.5k | } |
745 | | |
746 | 23.8k | const Expr *getArgExpr(unsigned Index) const override { |
747 | 23.8k | return getOriginExpr()->getArg(Index + 1); |
748 | 23.8k | } |
749 | | |
750 | | const Expr *getCXXThisExpr() const override; |
751 | | |
752 | 151k | Kind getKind() const override { return CE_CXXMemberOperator; } |
753 | 0 | StringRef getKindAsString() const override { return "CXXMemberOperatorCall"; } |
754 | | |
755 | 6.34k | static bool classof(const CallEvent *CA) { |
756 | 6.34k | return CA->getKind() == CE_CXXMemberOperator; |
757 | 6.34k | } |
758 | | |
759 | | Optional<unsigned> |
760 | 41 | getAdjustedParameterIndex(unsigned ASTArgumentIndex) const override { |
761 | | // For member operator calls argument 0 on the expression corresponds |
762 | | // to implicit this-parameter on the declaration. |
763 | 41 | return (ASTArgumentIndex > 0) ? Optional<unsigned>(ASTArgumentIndex - 1) |
764 | 41 | : None0 ; |
765 | 41 | } |
766 | | |
767 | 4.91k | unsigned getASTArgumentIndex(unsigned CallArgumentIndex) const override { |
768 | | // For member operator calls argument 0 on the expression corresponds |
769 | | // to implicit this-parameter on the declaration. |
770 | 4.91k | return CallArgumentIndex + 1; |
771 | 4.91k | } |
772 | | |
773 | 303 | OverloadedOperatorKind getOverloadedOperator() const { |
774 | 303 | return getOriginExpr()->getOperator(); |
775 | 303 | } |
776 | | }; |
777 | | |
778 | | /// Represents an implicit call to a C++ destructor. |
779 | | /// |
780 | | /// This can occur at the end of a scope (for automatic objects), at the end |
781 | | /// of a full-expression (for temporaries), or as part of a delete. |
782 | | class CXXDestructorCall : public CXXInstanceCall { |
783 | | friend class CallEventManager; |
784 | | |
785 | | protected: |
786 | | using DtorDataTy = llvm::PointerIntPair<const MemRegion *, 1, bool>; |
787 | | |
788 | | /// Creates an implicit destructor. |
789 | | /// |
790 | | /// \param DD The destructor that will be called. |
791 | | /// \param Trigger The statement whose completion causes this destructor call. |
792 | | /// \param Target The object region to be destructed. |
793 | | /// \param St The path-sensitive state at this point in the program. |
794 | | /// \param LCtx The location context at this point in the program. |
795 | | CXXDestructorCall(const CXXDestructorDecl *DD, const Stmt *Trigger, |
796 | | const MemRegion *Target, bool IsBaseDestructor, |
797 | | ProgramStateRef St, const LocationContext *LCtx) |
798 | 3.03k | : CXXInstanceCall(DD, St, LCtx) { |
799 | 3.03k | Data = DtorDataTy(Target, IsBaseDestructor).getOpaqueValue(); |
800 | 3.03k | Location = Trigger->getEndLoc(); |
801 | 3.03k | } |
802 | | |
803 | 3.28k | CXXDestructorCall(const CXXDestructorCall &Other) = default; |
804 | | |
805 | 3.28k | void cloneTo(void *Dest) const override {new (Dest) CXXDestructorCall(*this);} |
806 | | |
807 | | public: |
808 | 15.2k | SourceRange getSourceRange() const override { return Location; } |
809 | 10.4k | unsigned getNumArgs() const override { return 0; } |
810 | | |
811 | | RuntimeDefinition getRuntimeDefinition() const override; |
812 | | |
813 | | /// Returns the value of the implicit 'this' object. |
814 | | SVal getCXXThisVal() const override; |
815 | | |
816 | | /// Returns true if this is a call to a base class destructor. |
817 | 3.02k | bool isBaseDestructor() const { |
818 | 3.02k | return DtorDataTy::getFromOpaqueValue(Data).getInt(); |
819 | 3.02k | } |
820 | | |
821 | 32.4k | Kind getKind() const override { return CE_CXXDestructor; } |
822 | 4 | StringRef getKindAsString() const override { return "CXXDestructorCall"; } |
823 | | |
824 | 130k | static bool classof(const CallEvent *CA) { |
825 | 130k | return CA->getKind() == CE_CXXDestructor; |
826 | 130k | } |
827 | | }; |
828 | | |
829 | | /// Represents any constructor invocation. This includes regular constructors |
830 | | /// and inherited constructors. |
831 | | class AnyCXXConstructorCall : public AnyFunctionCall { |
832 | | protected: |
833 | | AnyCXXConstructorCall(const Expr *E, const MemRegion *Target, |
834 | | ProgramStateRef St, const LocationContext *LCtx) |
835 | 42.0k | : AnyFunctionCall(E, St, LCtx) { |
836 | 42.0k | assert(E && (isa<CXXConstructExpr>(E) || isa<CXXInheritedCtorInitExpr>(E))); |
837 | | // Target may be null when the region is unknown. |
838 | 0 | Data = Target; |
839 | 42.0k | } |
840 | | |
841 | | void getExtraInvalidatedValues(ValueList &Values, |
842 | | RegionAndSymbolInvalidationTraits *ETraits) const override; |
843 | | |
844 | | void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
845 | | BindingsTy &Bindings) const override; |
846 | | |
847 | | public: |
848 | | /// Returns the value of the implicit 'this' object. |
849 | | SVal getCXXThisVal() const; |
850 | | |
851 | 0 | static bool classof(const CallEvent *Call) { |
852 | 0 | return Call->getKind() >= CE_BEG_CXX_CONSTRUCTOR_CALLS && |
853 | 0 | Call->getKind() <= CE_END_CXX_CONSTRUCTOR_CALLS; |
854 | 0 | } |
855 | | }; |
856 | | |
857 | | /// Represents a call to a C++ constructor. |
858 | | /// |
859 | | /// Example: \c T(1) |
860 | | class CXXConstructorCall : public AnyCXXConstructorCall { |
861 | | friend class CallEventManager; |
862 | | |
863 | | protected: |
864 | | /// Creates a constructor call. |
865 | | /// |
866 | | /// \param CE The constructor expression as written in the source. |
867 | | /// \param Target The region where the object should be constructed. If NULL, |
868 | | /// a new symbolic region will be used. |
869 | | /// \param St The path-sensitive state at this point in the program. |
870 | | /// \param LCtx The location context at this point in the program. |
871 | | CXXConstructorCall(const CXXConstructExpr *CE, const MemRegion *Target, |
872 | | ProgramStateRef St, const LocationContext *LCtx) |
873 | 42.0k | : AnyCXXConstructorCall(CE, Target, St, LCtx) {} |
874 | | |
875 | 71.4k | CXXConstructorCall(const CXXConstructorCall &Other) = default; |
876 | | |
877 | 71.4k | void cloneTo(void *Dest) const override { new (Dest) CXXConstructorCall(*this); } |
878 | | |
879 | | public: |
880 | 2.00M | const CXXConstructExpr *getOriginExpr() const override { |
881 | 2.00M | return cast<CXXConstructExpr>(AnyFunctionCall::getOriginExpr()); |
882 | 2.00M | } |
883 | | |
884 | 943k | const CXXConstructorDecl *getDecl() const override { |
885 | 943k | return getOriginExpr()->getConstructor(); |
886 | 943k | } |
887 | | |
888 | 428k | unsigned getNumArgs() const override { return getOriginExpr()->getNumArgs(); } |
889 | | |
890 | 148k | const Expr *getArgExpr(unsigned Index) const override { |
891 | 148k | return getOriginExpr()->getArg(Index); |
892 | 148k | } |
893 | | |
894 | 848k | Kind getKind() const override { return CE_CXXConstructor; } |
895 | 13 | StringRef getKindAsString() const override { return "CXXConstructorCall"; } |
896 | | |
897 | 310k | static bool classof(const CallEvent *CA) { |
898 | 310k | return CA->getKind() == CE_CXXConstructor; |
899 | 310k | } |
900 | | }; |
901 | | |
902 | | /// Represents a call to a C++ inherited constructor. |
903 | | /// |
904 | | /// Example: \c class T : public S { using S::S; }; T(1); |
905 | | /// |
906 | | // Note, it is difficult to model the parameters. This is one of the reasons |
907 | | // why we skip analysis of inheriting constructors as top-level functions. |
908 | | // CXXInheritedCtorInitExpr doesn't take arguments and doesn't model parameter |
909 | | // initialization because there is none: the arguments in the outer |
910 | | // CXXConstructExpr directly initialize the parameters of the base class |
911 | | // constructor, and no copies are made. (Making a copy of the parameter is |
912 | | // incorrect, at least if it's done in an observable way.) The derived class |
913 | | // constructor doesn't even exist in the formal model. |
914 | | /// E.g., in: |
915 | | /// |
916 | | /// struct X { X *p = this; ~X() {} }; |
917 | | /// struct A { A(X x) : b(x.p == &x) {} bool b; }; |
918 | | /// struct B : A { using A::A; }; |
919 | | /// B b = X{}; |
920 | | /// |
921 | | /// ... b.b is initialized to true. |
922 | | class CXXInheritedConstructorCall : public AnyCXXConstructorCall { |
923 | | friend class CallEventManager; |
924 | | |
925 | | protected: |
926 | | CXXInheritedConstructorCall(const CXXInheritedCtorInitExpr *CE, |
927 | | const MemRegion *Target, ProgramStateRef St, |
928 | | const LocationContext *LCtx) |
929 | 13 | : AnyCXXConstructorCall(CE, Target, St, LCtx) {} |
930 | | |
931 | | CXXInheritedConstructorCall(const CXXInheritedConstructorCall &Other) = |
932 | 9 | default; |
933 | | |
934 | 9 | void cloneTo(void *Dest) const override { |
935 | 9 | new (Dest) CXXInheritedConstructorCall(*this); |
936 | 9 | } |
937 | | |
938 | | public: |
939 | 175 | const CXXInheritedCtorInitExpr *getOriginExpr() const override { |
940 | 175 | return cast<CXXInheritedCtorInitExpr>(AnyFunctionCall::getOriginExpr()); |
941 | 175 | } |
942 | | |
943 | 74 | const CXXConstructorDecl *getDecl() const override { |
944 | 74 | return getOriginExpr()->getConstructor(); |
945 | 74 | } |
946 | | |
947 | | /// Obtain the stack frame of the inheriting constructor. Argument expressions |
948 | | /// can be found on the call site of that stack frame. |
949 | | const StackFrameContext *getInheritingStackFrame() const; |
950 | | |
951 | | /// Obtain the CXXConstructExpr for the sub-class that inherited the current |
952 | | /// constructor (possibly indirectly). It's the statement that contains |
953 | | /// argument expressions. |
954 | 72 | const CXXConstructExpr *getInheritingConstructor() const { |
955 | 72 | return cast<CXXConstructExpr>(getInheritingStackFrame()->getCallSite()); |
956 | 72 | } |
957 | | |
958 | 37 | unsigned getNumArgs() const override { |
959 | 37 | return getInheritingConstructor()->getNumArgs(); |
960 | 37 | } |
961 | | |
962 | 35 | const Expr *getArgExpr(unsigned Index) const override { |
963 | 35 | return getInheritingConstructor()->getArg(Index); |
964 | 35 | } |
965 | | |
966 | 18 | SVal getArgSVal(unsigned Index) const override { |
967 | 18 | return getState()->getSVal( |
968 | 18 | getArgExpr(Index), |
969 | 18 | getInheritingStackFrame()->getParent()->getStackFrame()); |
970 | 18 | } |
971 | | |
972 | 93 | Kind getKind() const override { return CE_CXXInheritedConstructor; } |
973 | 0 | StringRef getKindAsString() const override { |
974 | 0 | return "CXXInheritedConstructorCall"; |
975 | 0 | } |
976 | | |
977 | 0 | static bool classof(const CallEvent *CA) { |
978 | 0 | return CA->getKind() == CE_CXXInheritedConstructor; |
979 | 0 | } |
980 | | }; |
981 | | |
982 | | /// Represents the memory allocation call in a C++ new-expression. |
983 | | /// |
984 | | /// This is a call to "operator new". |
985 | | class CXXAllocatorCall : public AnyFunctionCall { |
986 | | friend class CallEventManager; |
987 | | |
988 | | protected: |
989 | | CXXAllocatorCall(const CXXNewExpr *E, ProgramStateRef St, |
990 | | const LocationContext *LCtx) |
991 | 3.11k | : AnyFunctionCall(E, St, LCtx) {} |
992 | 3.27k | CXXAllocatorCall(const CXXAllocatorCall &Other) = default; |
993 | | |
994 | 3.27k | void cloneTo(void *Dest) const override { new (Dest) CXXAllocatorCall(*this); } |
995 | | |
996 | | public: |
997 | 148k | const CXXNewExpr *getOriginExpr() const override { |
998 | 148k | return cast<CXXNewExpr>(AnyFunctionCall::getOriginExpr()); |
999 | 148k | } |
1000 | | |
1001 | 61.3k | const FunctionDecl *getDecl() const override { |
1002 | 61.3k | return getOriginExpr()->getOperatorNew(); |
1003 | 61.3k | } |
1004 | | |
1005 | 492 | SVal getObjectUnderConstruction() const { |
1006 | 492 | return ExprEngine::getObjectUnderConstruction(getState(), getOriginExpr(), |
1007 | 492 | getLocationContext()) |
1008 | 492 | .getValue(); |
1009 | 492 | } |
1010 | | |
1011 | | /// Number of non-placement arguments to the call. It is equal to 2 for |
1012 | | /// C++17 aligned operator new() calls that have alignment implicitly |
1013 | | /// passed as the second argument, and to 1 for other operator new() calls. |
1014 | 38.1k | unsigned getNumImplicitArgs() const { |
1015 | 38.1k | return getOriginExpr()->passAlignment() ? 287 : 138.1k ; |
1016 | 38.1k | } |
1017 | | |
1018 | 26.2k | unsigned getNumArgs() const override { |
1019 | 26.2k | return getOriginExpr()->getNumPlacementArgs() + getNumImplicitArgs(); |
1020 | 26.2k | } |
1021 | | |
1022 | 9.57k | const Expr *getArgExpr(unsigned Index) const override { |
1023 | | // The first argument of an allocator call is the size of the allocation. |
1024 | 9.57k | if (Index < getNumImplicitArgs()) |
1025 | 7.26k | return nullptr; |
1026 | 2.31k | return getOriginExpr()->getPlacementArg(Index - getNumImplicitArgs()); |
1027 | 9.57k | } |
1028 | | |
1029 | | /// Number of placement arguments to the operator new() call. For example, |
1030 | | /// standard std::nothrow operator new and standard placement new both have |
1031 | | /// 1 implicit argument (size) and 1 placement argument, while regular |
1032 | | /// operator new() has 1 implicit argument and 0 placement arguments. |
1033 | 0 | const Expr *getPlacementArgExpr(unsigned Index) const { |
1034 | 0 | return getOriginExpr()->getPlacementArg(Index); |
1035 | 0 | } |
1036 | | |
1037 | 46.0k | Kind getKind() const override { return CE_CXXAllocator; } |
1038 | 16 | StringRef getKindAsString() const override { return "CXXAllocatorCall"; } |
1039 | | |
1040 | 0 | static bool classof(const CallEvent *CE) { |
1041 | 0 | return CE->getKind() == CE_CXXAllocator; |
1042 | 0 | } |
1043 | | }; |
1044 | | |
1045 | | /// Represents the memory deallocation call in a C++ delete-expression. |
1046 | | /// |
1047 | | /// This is a call to "operator delete". |
1048 | | // FIXME: CXXDeleteExpr isn't present for custom delete operators, or even for |
1049 | | // some those that are in the standard library, like the no-throw or align_val |
1050 | | // versions. |
1051 | | // Some pointers: |
1052 | | // http://lists.llvm.org/pipermail/cfe-dev/2020-April/065080.html |
1053 | | // clang/test/Analysis/cxx-dynamic-memory-analysis-order.cpp |
1054 | | // clang/unittests/StaticAnalyzer/CallEventTest.cpp |
1055 | | class CXXDeallocatorCall : public AnyFunctionCall { |
1056 | | friend class CallEventManager; |
1057 | | |
1058 | | protected: |
1059 | | CXXDeallocatorCall(const CXXDeleteExpr *E, ProgramStateRef St, |
1060 | | const LocationContext *LCtx) |
1061 | 493 | : AnyFunctionCall(E, St, LCtx) {} |
1062 | 1.42k | CXXDeallocatorCall(const CXXDeallocatorCall &Other) = default; |
1063 | | |
1064 | 1.42k | void cloneTo(void *Dest) const override { |
1065 | 1.42k | new (Dest) CXXDeallocatorCall(*this); |
1066 | 1.42k | } |
1067 | | |
1068 | | public: |
1069 | 49.4k | const CXXDeleteExpr *getOriginExpr() const override { |
1070 | 49.4k | return cast<CXXDeleteExpr>(AnyFunctionCall::getOriginExpr()); |
1071 | 49.4k | } |
1072 | | |
1073 | 39.1k | const FunctionDecl *getDecl() const override { |
1074 | 39.1k | return getOriginExpr()->getOperatorDelete(); |
1075 | 39.1k | } |
1076 | | |
1077 | 12.1k | unsigned getNumArgs() const override { return getDecl()->getNumParams(); } |
1078 | | |
1079 | 2.36k | const Expr *getArgExpr(unsigned Index) const override { |
1080 | | // CXXDeleteExpr's only have a single argument. |
1081 | 2.36k | return getOriginExpr()->getArgument(); |
1082 | 2.36k | } |
1083 | | |
1084 | 18.7k | Kind getKind() const override { return CE_CXXDeallocator; } |
1085 | 8 | StringRef getKindAsString() const override { return "CXXDeallocatorCall"; } |
1086 | | |
1087 | 141k | static bool classof(const CallEvent *CE) { |
1088 | 141k | return CE->getKind() == CE_CXXDeallocator; |
1089 | 141k | } |
1090 | | }; |
1091 | | |
1092 | | /// Represents the ways an Objective-C message send can occur. |
1093 | | // |
1094 | | // Note to maintainers: OCM_Message should always be last, since it does not |
1095 | | // need to fit in the Data field's low bits. |
1096 | | enum ObjCMessageKind { |
1097 | | OCM_PropertyAccess, |
1098 | | OCM_Subscript, |
1099 | | OCM_Message |
1100 | | }; |
1101 | | |
1102 | | /// Represents any expression that calls an Objective-C method. |
1103 | | /// |
1104 | | /// This includes all of the kinds listed in ObjCMessageKind. |
1105 | | class ObjCMethodCall : public CallEvent { |
1106 | | friend class CallEventManager; |
1107 | | |
1108 | | const PseudoObjectExpr *getContainingPseudoObjectExpr() const; |
1109 | | |
1110 | | protected: |
1111 | | ObjCMethodCall(const ObjCMessageExpr *Msg, ProgramStateRef St, |
1112 | | const LocationContext *LCtx) |
1113 | 6.42k | : CallEvent(Msg, St, LCtx) { |
1114 | 6.42k | Data = nullptr; |
1115 | 6.42k | } |
1116 | | |
1117 | 31.8k | ObjCMethodCall(const ObjCMethodCall &Other) = default; |
1118 | | |
1119 | 31.8k | void cloneTo(void *Dest) const override { new (Dest) ObjCMethodCall(*this); } |
1120 | | |
1121 | | void getExtraInvalidatedValues(ValueList &Values, |
1122 | | RegionAndSymbolInvalidationTraits *ETraits) const override; |
1123 | | |
1124 | | /// Check if the selector may have multiple definitions (may have overrides). |
1125 | | virtual bool canBeOverridenInSubclass(ObjCInterfaceDecl *IDecl, |
1126 | | Selector Sel) const; |
1127 | | |
1128 | | public: |
1129 | 319k | const ObjCMessageExpr *getOriginExpr() const override { |
1130 | 319k | return cast<ObjCMessageExpr>(CallEvent::getOriginExpr()); |
1131 | 319k | } |
1132 | | |
1133 | 83.7k | const ObjCMethodDecl *getDecl() const override { |
1134 | 83.7k | return getOriginExpr()->getMethodDecl(); |
1135 | 83.7k | } |
1136 | | |
1137 | 33.9k | unsigned getNumArgs() const override { |
1138 | 33.9k | return getOriginExpr()->getNumArgs(); |
1139 | 33.9k | } |
1140 | | |
1141 | 7.56k | const Expr *getArgExpr(unsigned Index) const override { |
1142 | 7.56k | return getOriginExpr()->getArg(Index); |
1143 | 7.56k | } |
1144 | | |
1145 | 45.3k | bool isInstanceMessage() const { |
1146 | 45.3k | return getOriginExpr()->isInstanceMessage(); |
1147 | 45.3k | } |
1148 | | |
1149 | 7.67k | ObjCMethodFamily getMethodFamily() const { |
1150 | 7.67k | return getOriginExpr()->getMethodFamily(); |
1151 | 7.67k | } |
1152 | | |
1153 | 2.15k | Selector getSelector() const { |
1154 | 2.15k | return getOriginExpr()->getSelector(); |
1155 | 2.15k | } |
1156 | | |
1157 | | SourceRange getSourceRange() const override; |
1158 | | |
1159 | | /// Returns the value of the receiver at the time of this call. |
1160 | | SVal getReceiverSVal() const; |
1161 | | |
1162 | | /// Get the interface for the receiver. |
1163 | | /// |
1164 | | /// This works whether this is an instance message or a class message. |
1165 | | /// However, it currently just uses the static type of the receiver. |
1166 | 3.95k | const ObjCInterfaceDecl *getReceiverInterface() const { |
1167 | 3.95k | return getOriginExpr()->getReceiverInterface(); |
1168 | 3.95k | } |
1169 | | |
1170 | | /// Checks if the receiver refers to 'self' or 'super'. |
1171 | | bool isReceiverSelfOrSuper() const; |
1172 | | |
1173 | | /// Returns how the message was written in the source (property access, |
1174 | | /// subscript, or explicit message send). |
1175 | | ObjCMessageKind getMessageKind() const; |
1176 | | |
1177 | | /// Returns true if this property access or subscript is a setter (has the |
1178 | | /// form of an assignment). |
1179 | 7 | bool isSetter() const { |
1180 | 7 | switch (getMessageKind()) { |
1181 | 0 | case OCM_Message: |
1182 | 0 | llvm_unreachable("This is not a pseudo-object access!"); |
1183 | 1 | case OCM_PropertyAccess: |
1184 | 1 | return getNumArgs() > 0; |
1185 | 6 | case OCM_Subscript: |
1186 | 6 | return getNumArgs() > 1; |
1187 | 7 | } |
1188 | 0 | llvm_unreachable("Unknown message kind"); |
1189 | 0 | } |
1190 | | |
1191 | | // Returns the property accessed by this method, either explicitly via |
1192 | | // property syntax or implicitly via a getter or setter method. Returns |
1193 | | // nullptr if the call is not a prooperty access. |
1194 | | const ObjCPropertyDecl *getAccessedProperty() const; |
1195 | | |
1196 | | RuntimeDefinition getRuntimeDefinition() const override; |
1197 | | |
1198 | | bool argumentsMayEscape() const override; |
1199 | | |
1200 | | void getInitialStackFrameContents(const StackFrameContext *CalleeCtx, |
1201 | | BindingsTy &Bindings) const override; |
1202 | | |
1203 | | ArrayRef<ParmVarDecl*> parameters() const override; |
1204 | | |
1205 | 137k | Kind getKind() const override { return CE_ObjCMessage; } |
1206 | 0 | StringRef getKindAsString() const override { return "ObjCMethodCall"; } |
1207 | | |
1208 | 329k | static bool classof(const CallEvent *CA) { |
1209 | 329k | return CA->getKind() == CE_ObjCMessage; |
1210 | 329k | } |
1211 | | }; |
1212 | | |
1213 | | /// Manages the lifetime of CallEvent objects. |
1214 | | /// |
1215 | | /// CallEventManager provides a way to create arbitrary CallEvents "on the |
1216 | | /// stack" as if they were value objects by keeping a cache of CallEvent-sized |
1217 | | /// memory blocks. The CallEvents created by CallEventManager are only valid |
1218 | | /// for the lifetime of the OwnedCallEvent that holds them; right now these |
1219 | | /// objects cannot be copied and ownership cannot be transferred. |
1220 | | class CallEventManager { |
1221 | | friend class CallEvent; |
1222 | | |
1223 | | llvm::BumpPtrAllocator &Alloc; |
1224 | | SmallVector<void *, 8> Cache; |
1225 | | |
1226 | | using CallEventTemplateTy = SimpleFunctionCall; |
1227 | | |
1228 | 496k | void reclaim(const void *Memory) { |
1229 | 496k | Cache.push_back(const_cast<void *>(Memory)); |
1230 | 496k | } |
1231 | | |
1232 | | /// Returns memory that can be initialized as a CallEvent. |
1233 | 496k | void *allocate() { |
1234 | 496k | if (Cache.empty()) |
1235 | 23.9k | return Alloc.Allocate<CallEventTemplateTy>(); |
1236 | 472k | else |
1237 | 472k | return Cache.pop_back_val(); |
1238 | 496k | } |
1239 | | |
1240 | | template <typename T, typename Arg> |
1241 | 164k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { |
1242 | 164k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), |
1243 | 164k | "CallEvent subclasses are not all the same size"); |
1244 | 164k | return new (allocate()) T(A, St, LCtx); |
1245 | 164k | } clang::ento::CXXMemberCall* clang::ento::CallEventManager::create<clang::ento::CXXMemberCall, clang::CXXMemberCallExpr const*>(clang::CXXMemberCallExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 19.4k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 19.4k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 19.4k | "CallEvent subclasses are not all the same size"); | 1244 | 19.4k | return new (allocate()) T(A, St, LCtx); | 1245 | 19.4k | } |
clang::ento::CXXMemberOperatorCall* clang::ento::CallEventManager::create<clang::ento::CXXMemberOperatorCall, clang::CXXOperatorCallExpr const*>(clang::CXXOperatorCallExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 9.03k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 9.03k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 9.03k | "CallEvent subclasses are not all the same size"); | 1244 | 9.03k | return new (allocate()) T(A, St, LCtx); | 1245 | 9.03k | } |
clang::ento::BlockCall* clang::ento::CallEventManager::create<clang::ento::BlockCall, clang::CallExpr const*>(clang::CallExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 591 | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 591 | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 591 | "CallEvent subclasses are not all the same size"); | 1244 | 591 | return new (allocate()) T(A, St, LCtx); | 1245 | 591 | } |
clang::ento::SimpleFunctionCall* clang::ento::CallEventManager::create<clang::ento::SimpleFunctionCall, clang::CallExpr const*>(clang::CallExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 125k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 125k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 125k | "CallEvent subclasses are not all the same size"); | 1244 | 125k | return new (allocate()) T(A, St, LCtx); | 1245 | 125k | } |
clang::ento::ObjCMethodCall* clang::ento::CallEventManager::create<clang::ento::ObjCMethodCall, clang::ObjCMessageExpr const*>(clang::ObjCMessageExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 6.42k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 6.42k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 6.42k | "CallEvent subclasses are not all the same size"); | 1244 | 6.42k | return new (allocate()) T(A, St, LCtx); | 1245 | 6.42k | } |
clang::ento::CXXAllocatorCall* clang::ento::CallEventManager::create<clang::ento::CXXAllocatorCall, clang::CXXNewExpr const*>(clang::CXXNewExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 3.11k | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 3.11k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 3.11k | "CallEvent subclasses are not all the same size"); | 1244 | 3.11k | return new (allocate()) T(A, St, LCtx); | 1245 | 3.11k | } |
clang::ento::CXXDeallocatorCall* clang::ento::CallEventManager::create<clang::ento::CXXDeallocatorCall, clang::CXXDeleteExpr const*>(clang::CXXDeleteExpr const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1241 | 493 | T *create(Arg A, ProgramStateRef St, const LocationContext *LCtx) { | 1242 | 493 | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1243 | 493 | "CallEvent subclasses are not all the same size"); | 1244 | 493 | return new (allocate()) T(A, St, LCtx); | 1245 | 493 | } |
|
1246 | | |
1247 | | template <typename T, typename Arg1, typename Arg2> |
1248 | 42.0k | T *create(Arg1 A1, Arg2 A2, ProgramStateRef St, const LocationContext *LCtx) { |
1249 | 42.0k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), |
1250 | 42.0k | "CallEvent subclasses are not all the same size"); |
1251 | 42.0k | return new (allocate()) T(A1, A2, St, LCtx); |
1252 | 42.0k | } clang::ento::CXXConstructorCall* clang::ento::CallEventManager::create<clang::ento::CXXConstructorCall, clang::CXXConstructExpr const*, clang::ento::MemRegion const*>(clang::CXXConstructExpr const*, clang::ento::MemRegion const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1248 | 42.0k | T *create(Arg1 A1, Arg2 A2, ProgramStateRef St, const LocationContext *LCtx) { | 1249 | 42.0k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1250 | 42.0k | "CallEvent subclasses are not all the same size"); | 1251 | 42.0k | return new (allocate()) T(A1, A2, St, LCtx); | 1252 | 42.0k | } |
clang::ento::CXXInheritedConstructorCall* clang::ento::CallEventManager::create<clang::ento::CXXInheritedConstructorCall, clang::CXXInheritedCtorInitExpr const*, clang::ento::MemRegion const*>(clang::CXXInheritedCtorInitExpr const*, clang::ento::MemRegion const*, llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>, clang::LocationContext const*) Line | Count | Source | 1248 | 13 | T *create(Arg1 A1, Arg2 A2, ProgramStateRef St, const LocationContext *LCtx) { | 1249 | 13 | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), | 1250 | 13 | "CallEvent subclasses are not all the same size"); | 1251 | 13 | return new (allocate()) T(A1, A2, St, LCtx); | 1252 | 13 | } |
|
1253 | | |
1254 | | template <typename T, typename Arg1, typename Arg2, typename Arg3> |
1255 | | T *create(Arg1 A1, Arg2 A2, Arg3 A3, ProgramStateRef St, |
1256 | | const LocationContext *LCtx) { |
1257 | | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), |
1258 | | "CallEvent subclasses are not all the same size"); |
1259 | | return new (allocate()) T(A1, A2, A3, St, LCtx); |
1260 | | } |
1261 | | |
1262 | | template <typename T, typename Arg1, typename Arg2, typename Arg3, |
1263 | | typename Arg4> |
1264 | | T *create(Arg1 A1, Arg2 A2, Arg3 A3, Arg4 A4, ProgramStateRef St, |
1265 | 3.03k | const LocationContext *LCtx) { |
1266 | 3.03k | static_assert(sizeof(T) == sizeof(CallEventTemplateTy), |
1267 | 3.03k | "CallEvent subclasses are not all the same size"); |
1268 | 3.03k | return new (allocate()) T(A1, A2, A3, A4, St, LCtx); |
1269 | 3.03k | } |
1270 | | |
1271 | | public: |
1272 | 15.3k | CallEventManager(llvm::BumpPtrAllocator &alloc) : Alloc(alloc) {} |
1273 | | |
1274 | | /// Gets an outside caller given a callee context. |
1275 | | CallEventRef<> |
1276 | | getCaller(const StackFrameContext *CalleeCtx, ProgramStateRef State); |
1277 | | |
1278 | | /// Gets a call event for a function call, Objective-C method call, |
1279 | | /// a 'new', or a 'delete' call. |
1280 | | CallEventRef<> |
1281 | | getCall(const Stmt *S, ProgramStateRef State, |
1282 | | const LocationContext *LC); |
1283 | | |
1284 | | CallEventRef<> |
1285 | | getSimpleCall(const CallExpr *E, ProgramStateRef State, |
1286 | | const LocationContext *LCtx); |
1287 | | |
1288 | | CallEventRef<ObjCMethodCall> |
1289 | | getObjCMethodCall(const ObjCMessageExpr *E, ProgramStateRef State, |
1290 | 6.42k | const LocationContext *LCtx) { |
1291 | 6.42k | return create<ObjCMethodCall>(E, State, LCtx); |
1292 | 6.42k | } |
1293 | | |
1294 | | CallEventRef<CXXConstructorCall> |
1295 | | getCXXConstructorCall(const CXXConstructExpr *E, const MemRegion *Target, |
1296 | 42.0k | ProgramStateRef State, const LocationContext *LCtx) { |
1297 | 42.0k | return create<CXXConstructorCall>(E, Target, State, LCtx); |
1298 | 42.0k | } |
1299 | | |
1300 | | CallEventRef<CXXInheritedConstructorCall> |
1301 | | getCXXInheritedConstructorCall(const CXXInheritedCtorInitExpr *E, |
1302 | | const MemRegion *Target, ProgramStateRef State, |
1303 | 13 | const LocationContext *LCtx) { |
1304 | 13 | return create<CXXInheritedConstructorCall>(E, Target, State, LCtx); |
1305 | 13 | } |
1306 | | |
1307 | | CallEventRef<CXXDestructorCall> |
1308 | | getCXXDestructorCall(const CXXDestructorDecl *DD, const Stmt *Trigger, |
1309 | | const MemRegion *Target, bool IsBase, |
1310 | 3.03k | ProgramStateRef State, const LocationContext *LCtx) { |
1311 | 3.03k | return create<CXXDestructorCall>(DD, Trigger, Target, IsBase, State, LCtx); |
1312 | 3.03k | } |
1313 | | |
1314 | | CallEventRef<CXXAllocatorCall> |
1315 | | getCXXAllocatorCall(const CXXNewExpr *E, ProgramStateRef State, |
1316 | 3.11k | const LocationContext *LCtx) { |
1317 | 3.11k | return create<CXXAllocatorCall>(E, State, LCtx); |
1318 | 3.11k | } |
1319 | | |
1320 | | CallEventRef<CXXDeallocatorCall> |
1321 | | getCXXDeallocatorCall(const CXXDeleteExpr *E, ProgramStateRef State, |
1322 | 493 | const LocationContext *LCtx) { |
1323 | 493 | return create<CXXDeallocatorCall>(E, State, LCtx); |
1324 | 493 | } |
1325 | | }; |
1326 | | |
1327 | | template <typename T> |
1328 | 1.08M | CallEventRef<T> CallEvent::cloneWithState(ProgramStateRef NewState) const { |
1329 | 1.08M | assert(isa<T>(*this) && "Cloning to unrelated type"); |
1330 | 0 | static_assert(sizeof(T) == sizeof(CallEvent), |
1331 | 1.08M | "Subclasses may not add fields"); |
1332 | | |
1333 | 1.08M | if (NewState == State) |
1334 | 800k | return cast<T>(this); |
1335 | | |
1336 | 286k | CallEventManager &Mgr = State->getStateManager().getCallEventManager(); |
1337 | 286k | T *Copy = static_cast<T *>(Mgr.allocate()); |
1338 | 286k | cloneTo(Copy); |
1339 | 286k | assert(Copy->getKind() == this->getKind() && "Bad copy"); |
1340 | | |
1341 | 0 | Copy->State = NewState; |
1342 | 286k | return Copy; |
1343 | 1.08M | } clang::ento::CallEventRef<clang::ento::ObjCMethodCall> clang::ento::CallEvent::cloneWithState<clang::ento::ObjCMethodCall>(llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) const Line | Count | Source | 1328 | 22.6k | CallEventRef<T> CallEvent::cloneWithState(ProgramStateRef NewState) const { | 1329 | 22.6k | assert(isa<T>(*this) && "Cloning to unrelated type"); | 1330 | 0 | static_assert(sizeof(T) == sizeof(CallEvent), | 1331 | 22.6k | "Subclasses may not add fields"); | 1332 | | | 1333 | 22.6k | if (NewState == State) | 1334 | 7.84k | return cast<T>(this); | 1335 | | | 1336 | 14.8k | CallEventManager &Mgr = State->getStateManager().getCallEventManager(); | 1337 | 14.8k | T *Copy = static_cast<T *>(Mgr.allocate()); | 1338 | 14.8k | cloneTo(Copy); | 1339 | 14.8k | assert(Copy->getKind() == this->getKind() && "Bad copy"); | 1340 | | | 1341 | 0 | Copy->State = NewState; | 1342 | 14.8k | return Copy; | 1343 | 22.6k | } |
clang::ento::CallEventRef<clang::ento::CallEvent> clang::ento::CallEvent::cloneWithState<clang::ento::CallEvent>(llvm::IntrusiveRefCntPtr<clang::ento::ProgramState const>) const Line | Count | Source | 1328 | 1.06M | CallEventRef<T> CallEvent::cloneWithState(ProgramStateRef NewState) const { | 1329 | 1.06M | assert(isa<T>(*this) && "Cloning to unrelated type"); | 1330 | 0 | static_assert(sizeof(T) == sizeof(CallEvent), | 1331 | 1.06M | "Subclasses may not add fields"); | 1332 | | | 1333 | 1.06M | if (NewState == State) | 1334 | 792k | return cast<T>(this); | 1335 | | | 1336 | 271k | CallEventManager &Mgr = State->getStateManager().getCallEventManager(); | 1337 | 271k | T *Copy = static_cast<T *>(Mgr.allocate()); | 1338 | 271k | cloneTo(Copy); | 1339 | 271k | assert(Copy->getKind() == this->getKind() && "Bad copy"); | 1340 | | | 1341 | 0 | Copy->State = NewState; | 1342 | 271k | return Copy; | 1343 | 1.06M | } |
|
1344 | | |
1345 | 1.41M | inline void CallEvent::Release() const { |
1346 | 1.41M | assert(RefCount > 0 && "Reference count is already zero."); |
1347 | 0 | --RefCount; |
1348 | | |
1349 | 1.41M | if (RefCount > 0) |
1350 | 919k | return; |
1351 | | |
1352 | 496k | CallEventManager &Mgr = State->getStateManager().getCallEventManager(); |
1353 | 496k | Mgr.reclaim(this); |
1354 | | |
1355 | 496k | this->~CallEvent(); |
1356 | 496k | } |
1357 | | |
1358 | | } // namespace ento |
1359 | | |
1360 | | } // namespace clang |
1361 | | |
1362 | | namespace llvm { |
1363 | | |
1364 | | // Support isa<>, cast<>, and dyn_cast<> for CallEventRef. |
1365 | | template<class T> struct simplify_type< clang::ento::CallEventRef<T>> { |
1366 | | using SimpleType = const T *; |
1367 | | |
1368 | | static SimpleType |
1369 | 42.8k | getSimplifiedValue(clang::ento::CallEventRef<T> Val) { |
1370 | 42.8k | return Val.get(); |
1371 | 42.8k | } |
1372 | | }; |
1373 | | |
1374 | | } // namespace llvm |
1375 | | |
1376 | | #endif // LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_CALLEVENT_H |