/Users/buildslave/jenkins/workspace/coverage/llvm-project/lldb/source/Target/StackFrame.cpp
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1 | | //===-- StackFrame.cpp ----------------------------------------------------===// |
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 | | #include "lldb/Target/StackFrame.h" |
10 | | #include "lldb/Core/Debugger.h" |
11 | | #include "lldb/Core/Disassembler.h" |
12 | | #include "lldb/Core/FormatEntity.h" |
13 | | #include "lldb/Core/Mangled.h" |
14 | | #include "lldb/Core/Module.h" |
15 | | #include "lldb/Core/Value.h" |
16 | | #include "lldb/Core/ValueObjectConstResult.h" |
17 | | #include "lldb/Core/ValueObjectMemory.h" |
18 | | #include "lldb/Core/ValueObjectVariable.h" |
19 | | #include "lldb/Symbol/CompileUnit.h" |
20 | | #include "lldb/Symbol/Function.h" |
21 | | #include "lldb/Symbol/Symbol.h" |
22 | | #include "lldb/Symbol/SymbolContextScope.h" |
23 | | #include "lldb/Symbol/SymbolFile.h" |
24 | | #include "lldb/Symbol/Type.h" |
25 | | #include "lldb/Symbol/VariableList.h" |
26 | | #include "lldb/Target/ABI.h" |
27 | | #include "lldb/Target/ExecutionContext.h" |
28 | | #include "lldb/Target/Process.h" |
29 | | #include "lldb/Target/RegisterContext.h" |
30 | | #include "lldb/Target/StackFrameRecognizer.h" |
31 | | #include "lldb/Target/Target.h" |
32 | | #include "lldb/Target/Thread.h" |
33 | | #include "lldb/Utility/LLDBLog.h" |
34 | | #include "lldb/Utility/Log.h" |
35 | | #include "lldb/Utility/RegisterValue.h" |
36 | | |
37 | | #include "lldb/lldb-enumerations.h" |
38 | | |
39 | | #include <memory> |
40 | | |
41 | | using namespace lldb; |
42 | | using namespace lldb_private; |
43 | | |
44 | | // The first bits in the flags are reserved for the SymbolContext::Scope bits |
45 | | // so we know if we have tried to look up information in our internal symbol |
46 | | // context (m_sc) already. |
47 | 5.58M | #define RESOLVED_FRAME_CODE_ADDR (uint32_t(eSymbolContextLastItem) << 1) |
48 | 4.27M | #define RESOLVED_FRAME_ID_SYMBOL_SCOPE (RESOLVED_FRAME_CODE_ADDR << 1) |
49 | 49.8k | #define GOT_FRAME_BASE (RESOLVED_FRAME_ID_SYMBOL_SCOPE << 1) |
50 | 29.1k | #define RESOLVED_VARIABLES (GOT_FRAME_BASE << 1) |
51 | 14.5k | #define RESOLVED_GLOBAL_VARIABLES (RESOLVED_VARIABLES << 1) |
52 | | |
53 | | StackFrame::StackFrame(const ThreadSP &thread_sp, user_id_t frame_idx, |
54 | | user_id_t unwind_frame_index, addr_t cfa, |
55 | | bool cfa_is_valid, addr_t pc, StackFrame::Kind kind, |
56 | | bool behaves_like_zeroth_frame, |
57 | | const SymbolContext *sc_ptr) |
58 | 182k | : m_thread_wp(thread_sp), m_frame_index(frame_idx), |
59 | 182k | m_concrete_frame_index(unwind_frame_index), m_reg_context_sp(), |
60 | 182k | m_id(pc, cfa, nullptr), m_frame_code_addr(pc), m_sc(), m_flags(), |
61 | 182k | m_frame_base(), m_frame_base_error(), m_cfa_is_valid(cfa_is_valid), |
62 | 182k | m_stack_frame_kind(kind), |
63 | 182k | m_behaves_like_zeroth_frame(behaves_like_zeroth_frame), |
64 | 182k | m_variable_list_sp(), m_variable_list_value_objects(), |
65 | 182k | m_recognized_frame_sp(), m_disassembly(), m_mutex() { |
66 | | // If we don't have a CFA value, use the frame index for our StackID so that |
67 | | // recursive functions properly aren't confused with one another on a history |
68 | | // stack. |
69 | 182k | if (IsHistorical() && !m_cfa_is_valid0 ) { |
70 | 0 | m_id.SetCFA(m_frame_index); |
71 | 0 | } |
72 | | |
73 | 182k | if (sc_ptr != nullptr) { |
74 | 64 | m_sc = *sc_ptr; |
75 | 64 | m_flags.Set(m_sc.GetResolvedMask()); |
76 | 64 | } |
77 | 182k | } |
78 | | |
79 | | StackFrame::StackFrame(const ThreadSP &thread_sp, user_id_t frame_idx, |
80 | | user_id_t unwind_frame_index, |
81 | | const RegisterContextSP ®_context_sp, addr_t cfa, |
82 | | addr_t pc, bool behaves_like_zeroth_frame, |
83 | | const SymbolContext *sc_ptr) |
84 | 19.6k | : m_thread_wp(thread_sp), m_frame_index(frame_idx), |
85 | 19.6k | m_concrete_frame_index(unwind_frame_index), |
86 | 19.6k | m_reg_context_sp(reg_context_sp), m_id(pc, cfa, nullptr), |
87 | 19.6k | m_frame_code_addr(pc), m_sc(), m_flags(), m_frame_base(), |
88 | 19.6k | m_frame_base_error(), m_cfa_is_valid(true), |
89 | 19.6k | m_stack_frame_kind(StackFrame::Kind::Regular), |
90 | 19.6k | m_behaves_like_zeroth_frame(behaves_like_zeroth_frame), |
91 | 19.6k | m_variable_list_sp(), m_variable_list_value_objects(), |
92 | 19.6k | m_recognized_frame_sp(), m_disassembly(), m_mutex() { |
93 | 19.6k | if (sc_ptr != nullptr) { |
94 | 0 | m_sc = *sc_ptr; |
95 | 0 | m_flags.Set(m_sc.GetResolvedMask()); |
96 | 0 | } |
97 | | |
98 | 19.6k | if (reg_context_sp && !m_sc.target_sp) { |
99 | 19.6k | m_sc.target_sp = reg_context_sp->CalculateTarget(); |
100 | 19.6k | if (m_sc.target_sp) |
101 | 19.6k | m_flags.Set(eSymbolContextTarget); |
102 | 19.6k | } |
103 | 19.6k | } |
104 | | |
105 | | StackFrame::StackFrame(const ThreadSP &thread_sp, user_id_t frame_idx, |
106 | | user_id_t unwind_frame_index, |
107 | | const RegisterContextSP ®_context_sp, addr_t cfa, |
108 | | const Address &pc_addr, bool behaves_like_zeroth_frame, |
109 | | const SymbolContext *sc_ptr) |
110 | 123 | : m_thread_wp(thread_sp), m_frame_index(frame_idx), |
111 | 123 | m_concrete_frame_index(unwind_frame_index), |
112 | 123 | m_reg_context_sp(reg_context_sp), |
113 | 123 | m_id(pc_addr.GetLoadAddress(thread_sp->CalculateTarget().get()), cfa, |
114 | 123 | nullptr), |
115 | 123 | m_frame_code_addr(pc_addr), m_sc(), m_flags(), m_frame_base(), |
116 | 123 | m_frame_base_error(), m_cfa_is_valid(true), |
117 | 123 | m_stack_frame_kind(StackFrame::Kind::Regular), |
118 | 123 | m_behaves_like_zeroth_frame(behaves_like_zeroth_frame), |
119 | 123 | m_variable_list_sp(), m_variable_list_value_objects(), |
120 | 123 | m_recognized_frame_sp(), m_disassembly(), m_mutex() { |
121 | 123 | if (sc_ptr != nullptr) { |
122 | 123 | m_sc = *sc_ptr; |
123 | 123 | m_flags.Set(m_sc.GetResolvedMask()); |
124 | 123 | } |
125 | | |
126 | 123 | if (!m_sc.target_sp && reg_context_sp) { |
127 | 123 | m_sc.target_sp = reg_context_sp->CalculateTarget(); |
128 | 123 | if (m_sc.target_sp) |
129 | 123 | m_flags.Set(eSymbolContextTarget); |
130 | 123 | } |
131 | | |
132 | 123 | ModuleSP pc_module_sp(pc_addr.GetModule()); |
133 | 123 | if (!m_sc.module_sp || m_sc.module_sp != pc_module_sp) { |
134 | 0 | if (pc_module_sp) { |
135 | 0 | m_sc.module_sp = pc_module_sp; |
136 | 0 | m_flags.Set(eSymbolContextModule); |
137 | 0 | } else { |
138 | 0 | m_sc.module_sp.reset(); |
139 | 0 | } |
140 | 0 | } |
141 | 123 | } |
142 | | |
143 | 201k | StackFrame::~StackFrame() = default; |
144 | | |
145 | 4.20M | StackID &StackFrame::GetStackID() { |
146 | 4.20M | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
147 | | // Make sure we have resolved the StackID object's symbol context scope if we |
148 | | // already haven't looked it up. |
149 | | |
150 | 4.20M | if (m_flags.IsClear(RESOLVED_FRAME_ID_SYMBOL_SCOPE)) { |
151 | 20.8k | if (m_id.GetSymbolContextScope()) { |
152 | | // We already have a symbol context scope, we just don't have our flag |
153 | | // bit set. |
154 | 0 | m_flags.Set(RESOLVED_FRAME_ID_SYMBOL_SCOPE); |
155 | 20.8k | } else { |
156 | | // Calculate the frame block and use this for the stack ID symbol context |
157 | | // scope if we have one. |
158 | 20.8k | SymbolContextScope *scope = GetFrameBlock(); |
159 | 20.8k | if (scope == nullptr) { |
160 | | // We don't have a block, so use the symbol |
161 | 8.16k | if (m_flags.IsClear(eSymbolContextSymbol)) |
162 | 7.61k | GetSymbolContext(eSymbolContextSymbol); |
163 | | |
164 | | // It is ok if m_sc.symbol is nullptr here |
165 | 8.16k | scope = m_sc.symbol; |
166 | 8.16k | } |
167 | | // Set the symbol context scope (the accessor will set the |
168 | | // RESOLVED_FRAME_ID_SYMBOL_SCOPE bit in m_flags). |
169 | 20.8k | SetSymbolContextScope(scope); |
170 | 20.8k | } |
171 | 20.8k | } |
172 | 4.20M | return m_id; |
173 | 4.20M | } |
174 | | |
175 | 8.56k | uint32_t StackFrame::GetFrameIndex() const { |
176 | 8.56k | ThreadSP thread_sp = GetThread(); |
177 | 8.56k | if (thread_sp) |
178 | 8.56k | return thread_sp->GetStackFrameList()->GetVisibleStackFrameIndex( |
179 | 8.56k | m_frame_index); |
180 | 0 | else |
181 | 0 | return m_frame_index; |
182 | 8.56k | } |
183 | | |
184 | 20.8k | void StackFrame::SetSymbolContextScope(SymbolContextScope *symbol_scope) { |
185 | 20.8k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
186 | 20.8k | m_flags.Set(RESOLVED_FRAME_ID_SYMBOL_SCOPE); |
187 | 20.8k | m_id.SetSymbolContextScope(symbol_scope); |
188 | 20.8k | } |
189 | | |
190 | 902k | const Address &StackFrame::GetFrameCodeAddress() { |
191 | 902k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
192 | 902k | if (m_flags.IsClear(RESOLVED_FRAME_CODE_ADDR) && |
193 | 902k | !m_frame_code_addr.IsSectionOffset()201k ) { |
194 | 201k | m_flags.Set(RESOLVED_FRAME_CODE_ADDR); |
195 | | |
196 | | // Resolve the PC into a temporary address because if ResolveLoadAddress |
197 | | // fails to resolve the address, it will clear the address object... |
198 | 201k | ThreadSP thread_sp(GetThread()); |
199 | 201k | if (thread_sp) { |
200 | 201k | TargetSP target_sp(thread_sp->CalculateTarget()); |
201 | 201k | if (target_sp) { |
202 | 201k | const bool allow_section_end = true; |
203 | 201k | if (m_frame_code_addr.SetOpcodeLoadAddress( |
204 | 201k | m_frame_code_addr.GetOffset(), target_sp.get(), |
205 | 201k | AddressClass::eCode, allow_section_end)) { |
206 | 201k | ModuleSP module_sp(m_frame_code_addr.GetModule()); |
207 | 201k | if (module_sp) { |
208 | 201k | m_sc.module_sp = module_sp; |
209 | 201k | m_flags.Set(eSymbolContextModule); |
210 | 201k | } |
211 | 201k | } |
212 | 201k | } |
213 | 201k | } |
214 | 201k | } |
215 | 902k | return m_frame_code_addr; |
216 | 902k | } |
217 | | |
218 | | // This can't be rewritten into a call to |
219 | | // RegisterContext::GetPCForSymbolication because this |
220 | | // StackFrame may have been constructed with a special pc, |
221 | | // e.g. tail-call artificial frames. |
222 | 587k | Address StackFrame::GetFrameCodeAddressForSymbolication() { |
223 | 587k | Address lookup_addr(GetFrameCodeAddress()); |
224 | 587k | if (!lookup_addr.IsValid()) |
225 | 119 | return lookup_addr; |
226 | 587k | if (m_behaves_like_zeroth_frame) |
227 | 45.0k | return lookup_addr; |
228 | | |
229 | 542k | addr_t offset = lookup_addr.GetOffset(); |
230 | 542k | if (offset > 0) { |
231 | 542k | lookup_addr.SetOffset(offset - 1); |
232 | 542k | } else { |
233 | | // lookup_addr is the start of a section. We need do the math on the |
234 | | // actual load address and re-compute the section. We're working with |
235 | | // a 'noreturn' function at the end of a section. |
236 | 6 | TargetSP target_sp = CalculateTarget(); |
237 | 6 | if (target_sp) { |
238 | 6 | addr_t addr_minus_one = lookup_addr.GetOpcodeLoadAddress( |
239 | 6 | target_sp.get(), AddressClass::eCode) - |
240 | 6 | 1; |
241 | 6 | lookup_addr.SetOpcodeLoadAddress(addr_minus_one, target_sp.get()); |
242 | 6 | } |
243 | 6 | } |
244 | 542k | return lookup_addr; |
245 | 587k | } |
246 | | |
247 | 18 | bool StackFrame::ChangePC(addr_t pc) { |
248 | 18 | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
249 | | // We can't change the pc value of a history stack frame - it is immutable. |
250 | 18 | if (IsHistorical()) |
251 | 0 | return false; |
252 | 18 | m_frame_code_addr.SetRawAddress(pc); |
253 | 18 | m_sc.Clear(false); |
254 | 18 | m_flags.Reset(0); |
255 | 18 | ThreadSP thread_sp(GetThread()); |
256 | 18 | if (thread_sp) |
257 | 18 | thread_sp->ClearStackFrames(); |
258 | 18 | return true; |
259 | 18 | } |
260 | | |
261 | 1 | const char *StackFrame::Disassemble() { |
262 | 1 | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
263 | 1 | if (!m_disassembly.Empty()) |
264 | 0 | return m_disassembly.GetData(); |
265 | | |
266 | 1 | ExecutionContext exe_ctx(shared_from_this()); |
267 | 1 | if (Target *target = exe_ctx.GetTargetPtr()) { |
268 | 1 | Disassembler::Disassemble(target->GetDebugger(), target->GetArchitecture(), |
269 | 1 | *this, m_disassembly); |
270 | 1 | } |
271 | | |
272 | 1 | return m_disassembly.Empty() ? nullptr0 : m_disassembly.GetData(); |
273 | 1 | } |
274 | | |
275 | 36.6k | Block *StackFrame::GetFrameBlock() { |
276 | 36.6k | if (m_sc.block == nullptr && m_flags.IsClear(eSymbolContextBlock)8.25k ) |
277 | 28 | GetSymbolContext(eSymbolContextBlock); |
278 | | |
279 | 36.6k | if (m_sc.block) { |
280 | 28.3k | Block *inline_block = m_sc.block->GetContainingInlinedBlock(); |
281 | 28.3k | if (inline_block) { |
282 | | // Use the block with the inlined function info as the frame block we |
283 | | // want this frame to have only the variables for the inlined function |
284 | | // and its non-inlined block child blocks. |
285 | 217 | return inline_block; |
286 | 28.1k | } else { |
287 | | // This block is not contained within any inlined function blocks with so |
288 | | // we want to use the top most function block. |
289 | 28.1k | return &m_sc.function->GetBlock(false); |
290 | 28.1k | } |
291 | 28.3k | } |
292 | 8.22k | return nullptr; |
293 | 36.6k | } |
294 | | |
295 | | // Get the symbol context if we already haven't done so by resolving the |
296 | | // PC address as much as possible. This way when we pass around a |
297 | | // StackFrame object, everyone will have as much information as possible and no |
298 | | // one will ever have to look things up manually. |
299 | | const SymbolContext & |
300 | 1.44M | StackFrame::GetSymbolContext(SymbolContextItem resolve_scope) { |
301 | 1.44M | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
302 | | // Copy our internal symbol context into "sc". |
303 | 1.44M | if ((m_flags.Get() & resolve_scope) != resolve_scope) { |
304 | 399k | uint32_t resolved = 0; |
305 | | |
306 | | // If the target was requested add that: |
307 | 399k | if (!m_sc.target_sp) { |
308 | 182k | m_sc.target_sp = CalculateTarget(); |
309 | 182k | if (m_sc.target_sp) |
310 | 182k | resolved |= eSymbolContextTarget; |
311 | 182k | } |
312 | | |
313 | | // Resolve our PC to section offset if we haven't already done so and if we |
314 | | // don't have a module. The resolved address section will contain the |
315 | | // module to which it belongs |
316 | 399k | if (!m_sc.module_sp && m_flags.IsClear(201k RESOLVED_FRAME_CODE_ADDR201k )) |
317 | 201k | GetFrameCodeAddress(); |
318 | | |
319 | | // If this is not frame zero, then we need to subtract 1 from the PC value |
320 | | // when doing address lookups since the PC will be on the instruction |
321 | | // following the function call instruction... |
322 | 399k | Address lookup_addr(GetFrameCodeAddressForSymbolication()); |
323 | | |
324 | 399k | if (m_sc.module_sp) { |
325 | | // We have something in our stack frame symbol context, lets check if we |
326 | | // haven't already tried to lookup one of those things. If we haven't |
327 | | // then we will do the query. |
328 | | |
329 | 399k | SymbolContextItem actual_resolve_scope = SymbolContextItem(0); |
330 | | |
331 | 399k | if (resolve_scope & eSymbolContextCompUnit) { |
332 | 4.92k | if (m_flags.IsClear(eSymbolContextCompUnit)) { |
333 | 1.64k | if (m_sc.comp_unit) |
334 | 0 | resolved |= eSymbolContextCompUnit; |
335 | 1.64k | else |
336 | 1.64k | actual_resolve_scope |= eSymbolContextCompUnit; |
337 | 1.64k | } |
338 | 4.92k | } |
339 | | |
340 | 399k | if (resolve_scope & eSymbolContextFunction) { |
341 | 384k | if (m_flags.IsClear(eSymbolContextFunction)) { |
342 | 201k | if (m_sc.function) |
343 | 0 | resolved |= eSymbolContextFunction; |
344 | 201k | else |
345 | 201k | actual_resolve_scope |= eSymbolContextFunction; |
346 | 201k | } |
347 | 384k | } |
348 | | |
349 | 399k | if (resolve_scope & eSymbolContextBlock) { |
350 | 206k | if (m_flags.IsClear(eSymbolContextBlock)) { |
351 | 201k | if (m_sc.block) |
352 | 0 | resolved |= eSymbolContextBlock; |
353 | 201k | else |
354 | 201k | actual_resolve_scope |= eSymbolContextBlock; |
355 | 201k | } |
356 | 206k | } |
357 | | |
358 | 399k | if (resolve_scope & eSymbolContextSymbol) { |
359 | 14.3k | if (m_flags.IsClear(eSymbolContextSymbol)) { |
360 | 12.4k | if (m_sc.symbol) |
361 | 0 | resolved |= eSymbolContextSymbol; |
362 | 12.4k | else |
363 | 12.4k | actual_resolve_scope |= eSymbolContextSymbol; |
364 | 12.4k | } |
365 | 14.3k | } |
366 | | |
367 | 399k | if (resolve_scope & eSymbolContextLineEntry) { |
368 | 10.8k | if (m_flags.IsClear(eSymbolContextLineEntry)) { |
369 | 9.48k | if (m_sc.line_entry.IsValid()) |
370 | 0 | resolved |= eSymbolContextLineEntry; |
371 | 9.48k | else |
372 | 9.48k | actual_resolve_scope |= eSymbolContextLineEntry; |
373 | 9.48k | } |
374 | 10.8k | } |
375 | | |
376 | 399k | if (actual_resolve_scope) { |
377 | | // We might be resolving less information than what is already in our |
378 | | // current symbol context so resolve into a temporary symbol context |
379 | | // "sc" so we don't clear out data we have already found in "m_sc" |
380 | 399k | SymbolContext sc; |
381 | | // Set flags that indicate what we have tried to resolve |
382 | 399k | resolved |= m_sc.module_sp->ResolveSymbolContextForAddress( |
383 | 399k | lookup_addr, actual_resolve_scope, sc); |
384 | | // Only replace what we didn't already have as we may have information |
385 | | // for an inlined function scope that won't match what a standard |
386 | | // lookup by address would match |
387 | 399k | if ((resolved & eSymbolContextCompUnit) && m_sc.comp_unit == nullptr372k ) |
388 | 188k | m_sc.comp_unit = sc.comp_unit; |
389 | 399k | if ((resolved & eSymbolContextFunction) && m_sc.function == nullptr364k ) |
390 | 188k | m_sc.function = sc.function; |
391 | 399k | if ((resolved & eSymbolContextBlock) && m_sc.block == nullptr188k ) |
392 | 188k | m_sc.block = sc.block; |
393 | 399k | if ((resolved & eSymbolContextSymbol) && m_sc.symbol == nullptr21.4k ) |
394 | 17.9k | m_sc.symbol = sc.symbol; |
395 | 399k | if ((resolved & eSymbolContextLineEntry) && |
396 | 399k | !m_sc.line_entry.IsValid()7.56k ) { |
397 | 7.56k | m_sc.line_entry = sc.line_entry; |
398 | 7.56k | m_sc.line_entry.ApplyFileMappings(m_sc.target_sp); |
399 | 7.56k | } |
400 | 399k | } |
401 | 399k | } else { |
402 | | // If we don't have a module, then we can't have the compile unit, |
403 | | // function, block, line entry or symbol, so we can safely call |
404 | | // ResolveSymbolContextForAddress with our symbol context member m_sc. |
405 | 631 | if (m_sc.target_sp) { |
406 | 631 | resolved |= m_sc.target_sp->GetImages().ResolveSymbolContextForAddress( |
407 | 631 | lookup_addr, resolve_scope, m_sc); |
408 | 631 | } |
409 | 631 | } |
410 | | |
411 | | // Update our internal flags so we remember what we have tried to locate so |
412 | | // we don't have to keep trying when more calls to this function are made. |
413 | | // We might have dug up more information that was requested (for example if |
414 | | // we were asked to only get the block, we will have gotten the compile |
415 | | // unit, and function) so set any additional bits that we resolved |
416 | 399k | m_flags.Set(resolve_scope | resolved); |
417 | 399k | } |
418 | | |
419 | | // Return the symbol context with everything that was possible to resolve |
420 | | // resolved. |
421 | 1.44M | return m_sc; |
422 | 1.44M | } |
423 | | |
424 | | VariableList *StackFrame::GetVariableList(bool get_file_globals, |
425 | 12.9k | Status *error_ptr) { |
426 | 12.9k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
427 | 12.9k | if (m_flags.IsClear(RESOLVED_VARIABLES)) { |
428 | 1.57k | m_flags.Set(RESOLVED_VARIABLES); |
429 | 1.57k | m_variable_list_sp = std::make_shared<VariableList>(); |
430 | | |
431 | 1.57k | Block *frame_block = GetFrameBlock(); |
432 | | |
433 | 1.57k | if (frame_block) { |
434 | 1.56k | const bool get_child_variables = true; |
435 | 1.56k | const bool can_create = true; |
436 | 1.56k | const bool stop_if_child_block_is_inlined_function = true; |
437 | 1.56k | frame_block->AppendBlockVariables(can_create, get_child_variables, |
438 | 1.56k | stop_if_child_block_is_inlined_function, |
439 | 19.6k | [](Variable *v) { return true; }, |
440 | 1.56k | m_variable_list_sp.get()); |
441 | 1.56k | } |
442 | 1.57k | } |
443 | | |
444 | 12.9k | if (m_flags.IsClear(RESOLVED_GLOBAL_VARIABLES) && get_file_globals2.33k ) { |
445 | 1.57k | m_flags.Set(RESOLVED_GLOBAL_VARIABLES); |
446 | | |
447 | 1.57k | if (m_flags.IsClear(eSymbolContextCompUnit)) |
448 | 5 | GetSymbolContext(eSymbolContextCompUnit); |
449 | | |
450 | 1.57k | if (m_sc.comp_unit) { |
451 | 1.56k | VariableListSP global_variable_list_sp( |
452 | 1.56k | m_sc.comp_unit->GetVariableList(true)); |
453 | 1.56k | if (m_variable_list_sp) |
454 | 1.56k | m_variable_list_sp->AddVariables(global_variable_list_sp.get()); |
455 | 0 | else |
456 | 0 | m_variable_list_sp = global_variable_list_sp; |
457 | 1.56k | } |
458 | 1.57k | } |
459 | | |
460 | 12.9k | if (error_ptr && m_variable_list_sp->GetSize() == 04.23k ) { |
461 | | // Check with the symbol file to check if there is an error for why we |
462 | | // don't have variables that the user might need to know about. |
463 | 29 | GetSymbolContext(eSymbolContextEverything); |
464 | 29 | if (m_sc.module_sp) { |
465 | 29 | SymbolFile *sym_file = m_sc.module_sp->GetSymbolFile(); |
466 | 29 | if (sym_file) |
467 | 29 | *error_ptr = sym_file->GetFrameVariableError(*this); |
468 | 29 | } |
469 | 29 | } |
470 | | |
471 | 12.9k | return m_variable_list_sp.get(); |
472 | 12.9k | } |
473 | | |
474 | | VariableListSP |
475 | | StackFrame::GetInScopeVariableList(bool get_file_globals, |
476 | 28.4k | bool must_have_valid_location) { |
477 | 28.4k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
478 | | // We can't fetch variable information for a history stack frame. |
479 | 28.4k | if (IsHistorical()) |
480 | 0 | return VariableListSP(); |
481 | | |
482 | 28.4k | VariableListSP var_list_sp(new VariableList); |
483 | 28.4k | GetSymbolContext(eSymbolContextCompUnit | eSymbolContextBlock); |
484 | | |
485 | 28.4k | if (m_sc.block) { |
486 | 28.4k | const bool can_create = true; |
487 | 28.4k | const bool get_parent_variables = true; |
488 | 28.4k | const bool stop_if_block_is_inlined_function = true; |
489 | 28.4k | m_sc.block->AppendVariables( |
490 | 28.4k | can_create, get_parent_variables, stop_if_block_is_inlined_function, |
491 | 417k | [this, must_have_valid_location](Variable *v) { |
492 | 417k | return v->IsInScope(this) && (!must_have_valid_location || |
493 | 417k | v->LocationIsValidForFrame(this)82.0k ); |
494 | 417k | }, |
495 | 28.4k | var_list_sp.get()); |
496 | 28.4k | } |
497 | | |
498 | 28.4k | if (m_sc.comp_unit && get_file_globals28.4k ) { |
499 | 21.6k | VariableListSP global_variable_list_sp( |
500 | 21.6k | m_sc.comp_unit->GetVariableList(true)); |
501 | 21.6k | if (global_variable_list_sp) |
502 | 21.6k | var_list_sp->AddVariables(global_variable_list_sp.get()); |
503 | 21.6k | } |
504 | | |
505 | 28.4k | return var_list_sp; |
506 | 28.4k | } |
507 | | |
508 | | ValueObjectSP StackFrame::GetValueForVariableExpressionPath( |
509 | | llvm::StringRef var_expr, DynamicValueType use_dynamic, uint32_t options, |
510 | 5.80k | VariableSP &var_sp, Status &error) { |
511 | 5.80k | llvm::StringRef original_var_expr = var_expr; |
512 | | // We can't fetch variable information for a history stack frame. |
513 | 5.80k | if (IsHistorical()) |
514 | 0 | return ValueObjectSP(); |
515 | | |
516 | 5.80k | if (var_expr.empty()) { |
517 | 0 | error.SetErrorStringWithFormat("invalid variable path '%s'", |
518 | 0 | var_expr.str().c_str()); |
519 | 0 | return ValueObjectSP(); |
520 | 0 | } |
521 | | |
522 | 5.80k | const bool check_ptr_vs_member = |
523 | 5.80k | (options & eExpressionPathOptionCheckPtrVsMember) != 0; |
524 | 5.80k | const bool no_fragile_ivar = |
525 | 5.80k | (options & eExpressionPathOptionsNoFragileObjcIvar) != 0; |
526 | 5.80k | const bool no_synth_child = |
527 | 5.80k | (options & eExpressionPathOptionsNoSyntheticChildren) != 0; |
528 | | // const bool no_synth_array = (options & |
529 | | // eExpressionPathOptionsNoSyntheticArrayRange) != 0; |
530 | 5.80k | error.Clear(); |
531 | 5.80k | bool deref = false; |
532 | 5.80k | bool address_of = false; |
533 | 5.80k | ValueObjectSP valobj_sp; |
534 | 5.80k | const bool get_file_globals = true; |
535 | | // When looking up a variable for an expression, we need only consider the |
536 | | // variables that are in scope. |
537 | 5.80k | VariableListSP var_list_sp(GetInScopeVariableList(get_file_globals)); |
538 | 5.80k | VariableList *variable_list = var_list_sp.get(); |
539 | | |
540 | 5.80k | if (!variable_list) |
541 | 0 | return ValueObjectSP(); |
542 | | |
543 | | // If first character is a '*', then show pointer contents |
544 | 5.80k | std::string var_expr_storage; |
545 | 5.80k | if (var_expr[0] == '*') { |
546 | 139 | deref = true; |
547 | 139 | var_expr = var_expr.drop_front(); // Skip the '*' |
548 | 5.66k | } else if (var_expr[0] == '&') { |
549 | 4 | address_of = true; |
550 | 4 | var_expr = var_expr.drop_front(); // Skip the '&' |
551 | 4 | } |
552 | | |
553 | 5.80k | size_t separator_idx = var_expr.find_first_of(".-[=+~|&^%#@!/?,<>{}"); |
554 | 5.80k | StreamString var_expr_path_strm; |
555 | | |
556 | 5.80k | ConstString name_const_string(var_expr.substr(0, separator_idx)); |
557 | | |
558 | 5.80k | var_sp = variable_list->FindVariable(name_const_string, false); |
559 | | |
560 | 5.80k | bool synthetically_added_instance_object = false; |
561 | | |
562 | 5.80k | if (var_sp) { |
563 | 5.76k | var_expr = var_expr.drop_front(name_const_string.GetLength()); |
564 | 5.76k | } |
565 | | |
566 | 5.80k | if (!var_sp && (options & eExpressionPathOptionsAllowDirectIVarAccess)32 ) { |
567 | | // Check for direct ivars access which helps us with implicit access to |
568 | | // ivars using "this" or "self". |
569 | 18 | GetSymbolContext(eSymbolContextFunction | eSymbolContextBlock); |
570 | 18 | llvm::StringRef instance_var_name = m_sc.GetInstanceVariableName(); |
571 | 18 | if (!instance_var_name.empty()) { |
572 | 15 | var_sp = variable_list->FindVariable(ConstString(instance_var_name)); |
573 | 15 | if (var_sp) { |
574 | 14 | separator_idx = 0; |
575 | 14 | if (Type *var_type = var_sp->GetType()) |
576 | 14 | if (auto compiler_type = var_type->GetForwardCompilerType()) |
577 | 14 | if (!compiler_type.IsPointerType()) |
578 | 0 | var_expr_storage = "."; |
579 | | |
580 | 14 | if (var_expr_storage.empty()) |
581 | 14 | var_expr_storage = "->"; |
582 | 14 | var_expr_storage += var_expr; |
583 | 14 | var_expr = var_expr_storage; |
584 | 14 | synthetically_added_instance_object = true; |
585 | 14 | } |
586 | 15 | } |
587 | 18 | } |
588 | | |
589 | 5.80k | if (!var_sp && (options & eExpressionPathOptionsInspectAnonymousUnions)18 ) { |
590 | | // Check if any anonymous unions are there which contain a variable with |
591 | | // the name we need |
592 | 6 | for (const VariableSP &variable_sp : *variable_list) { |
593 | 6 | if (!variable_sp) |
594 | 0 | continue; |
595 | 6 | if (!variable_sp->GetName().IsEmpty()) |
596 | 6 | continue; |
597 | | |
598 | 0 | Type *var_type = variable_sp->GetType(); |
599 | 0 | if (!var_type) |
600 | 0 | continue; |
601 | | |
602 | 0 | if (!var_type->GetForwardCompilerType().IsAnonymousType()) |
603 | 0 | continue; |
604 | 0 | valobj_sp = GetValueObjectForFrameVariable(variable_sp, use_dynamic); |
605 | 0 | if (!valobj_sp) |
606 | 0 | return valobj_sp; |
607 | 0 | valobj_sp = valobj_sp->GetChildMemberWithName(name_const_string); |
608 | 0 | if (valobj_sp) |
609 | 0 | break; |
610 | 0 | } |
611 | 2 | } |
612 | | |
613 | 5.80k | if (var_sp && !valobj_sp5.78k ) { |
614 | 5.78k | valobj_sp = GetValueObjectForFrameVariable(var_sp, use_dynamic); |
615 | 5.78k | if (!valobj_sp) |
616 | 0 | return valobj_sp; |
617 | 5.78k | } |
618 | 5.80k | if (!valobj_sp) { |
619 | 18 | error.SetErrorStringWithFormat("no variable named '%s' found in this frame", |
620 | 18 | name_const_string.GetCString()); |
621 | 18 | return ValueObjectSP(); |
622 | 18 | } |
623 | | |
624 | | // We are dumping at least one child |
625 | 9.19k | while (5.78k !var_expr.empty()) { |
626 | | // Calculate the next separator index ahead of time |
627 | 3.44k | ValueObjectSP child_valobj_sp; |
628 | 3.44k | const char separator_type = var_expr[0]; |
629 | 3.44k | bool expr_is_ptr = false; |
630 | 3.44k | switch (separator_type) { |
631 | 534 | case '-': |
632 | 534 | expr_is_ptr = true; |
633 | 534 | if (var_expr.size() >= 2 && var_expr[1] != '>') |
634 | 0 | return ValueObjectSP(); |
635 | | |
636 | 534 | if (no_fragile_ivar) { |
637 | | // Make sure we aren't trying to deref an objective |
638 | | // C ivar if this is not allowed |
639 | 0 | const uint32_t pointer_type_flags = |
640 | 0 | valobj_sp->GetCompilerType().GetTypeInfo(nullptr); |
641 | 0 | if ((pointer_type_flags & eTypeIsObjC) && |
642 | 0 | (pointer_type_flags & eTypeIsPointer)) { |
643 | | // This was an objective C object pointer and it was requested we |
644 | | // skip any fragile ivars so return nothing here |
645 | 0 | return ValueObjectSP(); |
646 | 0 | } |
647 | 0 | } |
648 | | |
649 | | // If we have a non pointer type with a sythetic value then lets check if |
650 | | // we have an sythetic dereference specified. |
651 | 534 | if (!valobj_sp->IsPointerType() && valobj_sp->HasSyntheticValue()33 ) { |
652 | 9 | Status deref_error; |
653 | 9 | if (valobj_sp->GetCompilerType().IsReferenceType()) { |
654 | 0 | valobj_sp = valobj_sp->GetSyntheticValue()->Dereference(deref_error); |
655 | 0 | if (error.Fail()) { |
656 | 0 | error.SetErrorStringWithFormatv( |
657 | 0 | "Failed to dereference reference type: %s", deref_error); |
658 | 0 | return ValueObjectSP(); |
659 | 0 | } |
660 | 0 | } |
661 | | |
662 | 9 | valobj_sp = valobj_sp->Dereference(deref_error); |
663 | 9 | if (error.Fail()) { |
664 | 0 | error.SetErrorStringWithFormatv( |
665 | 0 | "Failed to dereference sythetic value: {0}", deref_error); |
666 | 0 | return ValueObjectSP(); |
667 | 0 | } |
668 | | // Some synthetic plug-ins fail to set the error in Dereference |
669 | 9 | if (!valobj_sp) { |
670 | 0 | error.SetErrorString("Failed to dereference sythetic value"); |
671 | 0 | return ValueObjectSP(); |
672 | 0 | } |
673 | 9 | expr_is_ptr = false; |
674 | 9 | } |
675 | | |
676 | 534 | var_expr = var_expr.drop_front(); // Remove the '-' |
677 | 534 | [[fallthrough]]; |
678 | 2.05k | case '.': { |
679 | 2.05k | var_expr = var_expr.drop_front(); // Remove the '.' or '>' |
680 | 2.05k | separator_idx = var_expr.find_first_of(".-["); |
681 | 2.05k | ConstString child_name(var_expr.substr(0, var_expr.find_first_of(".-["))); |
682 | | |
683 | 2.05k | if (check_ptr_vs_member) { |
684 | | // We either have a pointer type and need to verify valobj_sp is a |
685 | | // pointer, or we have a member of a class/union/struct being accessed |
686 | | // with the . syntax and need to verify we don't have a pointer. |
687 | 2.05k | const bool actual_is_ptr = valobj_sp->IsPointerType(); |
688 | | |
689 | 2.05k | if (actual_is_ptr != expr_is_ptr) { |
690 | | // Incorrect use of "." with a pointer, or "->" with a |
691 | | // class/union/struct instance or reference. |
692 | 27 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
693 | 27 | if (actual_is_ptr) |
694 | 3 | error.SetErrorStringWithFormat( |
695 | 3 | "\"%s\" is a pointer and . was used to attempt to access " |
696 | 3 | "\"%s\". Did you mean \"%s->%s\"?", |
697 | 3 | var_expr_path_strm.GetData(), child_name.GetCString(), |
698 | 3 | var_expr_path_strm.GetData(), var_expr.str().c_str()); |
699 | 24 | else |
700 | 24 | error.SetErrorStringWithFormat( |
701 | 24 | "\"%s\" is not a pointer and -> was used to attempt to " |
702 | 24 | "access \"%s\". Did you mean \"%s.%s\"?", |
703 | 24 | var_expr_path_strm.GetData(), child_name.GetCString(), |
704 | 24 | var_expr_path_strm.GetData(), var_expr.str().c_str()); |
705 | 27 | return ValueObjectSP(); |
706 | 27 | } |
707 | 2.05k | } |
708 | 2.03k | child_valobj_sp = valobj_sp->GetChildMemberWithName(child_name); |
709 | 2.03k | if (!child_valobj_sp) { |
710 | 7 | if (!no_synth_child) { |
711 | 7 | child_valobj_sp = valobj_sp->GetSyntheticValue(); |
712 | 7 | if (child_valobj_sp) |
713 | 3 | child_valobj_sp = |
714 | 3 | child_valobj_sp->GetChildMemberWithName(child_name); |
715 | 7 | } |
716 | | |
717 | 7 | if (no_synth_child || !child_valobj_sp) { |
718 | | // No child member with name "child_name" |
719 | 4 | if (synthetically_added_instance_object) { |
720 | | // We added a "this->" or "self->" to the beginning of the |
721 | | // expression and this is the first pointer ivar access, so just |
722 | | // return the normal error |
723 | 0 | error.SetErrorStringWithFormat( |
724 | 0 | "no variable or instance variable named '%s' found in " |
725 | 0 | "this frame", |
726 | 0 | name_const_string.GetCString()); |
727 | 4 | } else { |
728 | 4 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
729 | 4 | if (child_name) { |
730 | 4 | error.SetErrorStringWithFormat( |
731 | 4 | "\"%s\" is not a member of \"(%s) %s\"", |
732 | 4 | child_name.GetCString(), |
733 | 4 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
734 | 4 | var_expr_path_strm.GetData()); |
735 | 4 | } else { |
736 | 0 | error.SetErrorStringWithFormat( |
737 | 0 | "incomplete expression path after \"%s\" in \"%s\"", |
738 | 0 | var_expr_path_strm.GetData(), |
739 | 0 | original_var_expr.str().c_str()); |
740 | 0 | } |
741 | 4 | } |
742 | 4 | return ValueObjectSP(); |
743 | 4 | } |
744 | 7 | } |
745 | 2.02k | synthetically_added_instance_object = false; |
746 | | // Remove the child name from the path |
747 | 2.02k | var_expr = var_expr.drop_front(child_name.GetLength()); |
748 | 2.02k | if (use_dynamic != eNoDynamicValues) { |
749 | 1.95k | ValueObjectSP dynamic_value_sp( |
750 | 1.95k | child_valobj_sp->GetDynamicValue(use_dynamic)); |
751 | 1.95k | if (dynamic_value_sp) |
752 | 25 | child_valobj_sp = dynamic_value_sp; |
753 | 1.95k | } |
754 | 2.02k | } break; |
755 | | |
756 | 1.38k | case '[': { |
757 | | // Array member access, or treating pointer as an array Need at least two |
758 | | // brackets and a number |
759 | 1.38k | if (var_expr.size() <= 2) { |
760 | 0 | error.SetErrorStringWithFormat( |
761 | 0 | "invalid square bracket encountered after \"%s\" in \"%s\"", |
762 | 0 | var_expr_path_strm.GetData(), var_expr.str().c_str()); |
763 | 0 | return ValueObjectSP(); |
764 | 0 | } |
765 | | |
766 | | // Drop the open brace. |
767 | 1.38k | var_expr = var_expr.drop_front(); |
768 | 1.38k | long child_index = 0; |
769 | | |
770 | | // If there's no closing brace, this is an invalid expression. |
771 | 1.38k | size_t end_pos = var_expr.find_first_of(']'); |
772 | 1.38k | if (end_pos == llvm::StringRef::npos) { |
773 | 0 | error.SetErrorStringWithFormat( |
774 | 0 | "missing closing square bracket in expression \"%s\"", |
775 | 0 | var_expr_path_strm.GetData()); |
776 | 0 | return ValueObjectSP(); |
777 | 0 | } |
778 | 1.38k | llvm::StringRef index_expr = var_expr.take_front(end_pos); |
779 | 1.38k | llvm::StringRef original_index_expr = index_expr; |
780 | | // Drop all of "[index_expr]" |
781 | 1.38k | var_expr = var_expr.drop_front(end_pos + 1); |
782 | | |
783 | 1.38k | if (index_expr.consumeInteger(0, child_index)) { |
784 | | // If there was no integer anywhere in the index expression, this is |
785 | | // erroneous expression. |
786 | 0 | error.SetErrorStringWithFormat("invalid index expression \"%s\"", |
787 | 0 | index_expr.str().c_str()); |
788 | 0 | return ValueObjectSP(); |
789 | 0 | } |
790 | | |
791 | 1.38k | if (index_expr.empty()) { |
792 | | // The entire index expression was a single integer. |
793 | | |
794 | 1.38k | if (valobj_sp->GetCompilerType().IsPointerToScalarType() && deref0 ) { |
795 | | // what we have is *ptr[low]. the most similar C++ syntax is to deref |
796 | | // ptr and extract bit low out of it. reading array item low would be |
797 | | // done by saying ptr[low], without a deref * sign |
798 | 0 | Status error; |
799 | 0 | ValueObjectSP temp(valobj_sp->Dereference(error)); |
800 | 0 | if (error.Fail()) { |
801 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
802 | 0 | error.SetErrorStringWithFormat( |
803 | 0 | "could not dereference \"(%s) %s\"", |
804 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
805 | 0 | var_expr_path_strm.GetData()); |
806 | 0 | return ValueObjectSP(); |
807 | 0 | } |
808 | 0 | valobj_sp = temp; |
809 | 0 | deref = false; |
810 | 1.38k | } else if (valobj_sp->GetCompilerType().IsArrayOfScalarType() && |
811 | 1.38k | deref134 ) { |
812 | | // what we have is *arr[low]. the most similar C++ syntax is to get |
813 | | // arr[0] (an operation that is equivalent to deref-ing arr) and |
814 | | // extract bit low out of it. reading array item low would be done by |
815 | | // saying arr[low], without a deref * sign |
816 | 0 | Status error; |
817 | 0 | ValueObjectSP temp(valobj_sp->GetChildAtIndex(0)); |
818 | 0 | if (error.Fail()) { |
819 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
820 | 0 | error.SetErrorStringWithFormat( |
821 | 0 | "could not get item 0 for \"(%s) %s\"", |
822 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
823 | 0 | var_expr_path_strm.GetData()); |
824 | 0 | return ValueObjectSP(); |
825 | 0 | } |
826 | 0 | valobj_sp = temp; |
827 | 0 | deref = false; |
828 | 0 | } |
829 | | |
830 | 1.38k | bool is_incomplete_array = false; |
831 | 1.38k | if (valobj_sp->IsPointerType()) { |
832 | 43 | bool is_objc_pointer = true; |
833 | | |
834 | 43 | if (valobj_sp->GetCompilerType().GetMinimumLanguage() != |
835 | 43 | eLanguageTypeObjC) |
836 | 41 | is_objc_pointer = false; |
837 | 2 | else if (!valobj_sp->GetCompilerType().IsPointerType()) |
838 | 0 | is_objc_pointer = false; |
839 | | |
840 | 43 | if (no_synth_child && is_objc_pointer0 ) { |
841 | 0 | error.SetErrorStringWithFormat( |
842 | 0 | "\"(%s) %s\" is an Objective-C pointer, and cannot be " |
843 | 0 | "subscripted", |
844 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
845 | 0 | var_expr_path_strm.GetData()); |
846 | |
|
847 | 0 | return ValueObjectSP(); |
848 | 43 | } else if (is_objc_pointer) { |
849 | | // dereferencing ObjC variables is not valid.. so let's try and |
850 | | // recur to synthetic children |
851 | 2 | ValueObjectSP synthetic = valobj_sp->GetSyntheticValue(); |
852 | 2 | if (!synthetic /* no synthetic */ |
853 | 2 | || synthetic == valobj_sp) /* synthetic is the same as |
854 | | the original object */ |
855 | 0 | { |
856 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
857 | 0 | error.SetErrorStringWithFormat( |
858 | 0 | "\"(%s) %s\" is not an array type", |
859 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
860 | 0 | var_expr_path_strm.GetData()); |
861 | 2 | } else if ( |
862 | 2 | static_cast<uint32_t>(child_index) >= |
863 | 2 | synthetic |
864 | 2 | ->GetNumChildren() /* synthetic does not have that many values */) { |
865 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
866 | 0 | error.SetErrorStringWithFormat( |
867 | 0 | "array index %ld is not valid for \"(%s) %s\"", child_index, |
868 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
869 | 0 | var_expr_path_strm.GetData()); |
870 | 2 | } else { |
871 | 2 | child_valobj_sp = synthetic->GetChildAtIndex(child_index); |
872 | 2 | if (!child_valobj_sp) { |
873 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
874 | 0 | error.SetErrorStringWithFormat( |
875 | 0 | "array index %ld is not valid for \"(%s) %s\"", child_index, |
876 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
877 | 0 | var_expr_path_strm.GetData()); |
878 | 0 | } |
879 | 2 | } |
880 | 41 | } else { |
881 | 41 | child_valobj_sp = |
882 | 41 | valobj_sp->GetSyntheticArrayMember(child_index, true); |
883 | 41 | if (!child_valobj_sp) { |
884 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
885 | 0 | error.SetErrorStringWithFormat( |
886 | 0 | "failed to use pointer as array for index %ld for " |
887 | 0 | "\"(%s) %s\"", |
888 | 0 | child_index, |
889 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
890 | 0 | var_expr_path_strm.GetData()); |
891 | 0 | } |
892 | 41 | } |
893 | 1.34k | } else if (valobj_sp->GetCompilerType().IsArrayType( |
894 | 1.34k | nullptr, nullptr, &is_incomplete_array)) { |
895 | | // Pass false to dynamic_value here so we can tell the difference |
896 | | // between no dynamic value and no member of this type... |
897 | 467 | child_valobj_sp = valobj_sp->GetChildAtIndex(child_index); |
898 | 467 | if (!child_valobj_sp && (4 is_incomplete_array4 || !no_synth_child0 )) |
899 | 4 | child_valobj_sp = |
900 | 4 | valobj_sp->GetSyntheticArrayMember(child_index, true); |
901 | | |
902 | 467 | if (!child_valobj_sp) { |
903 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
904 | 0 | error.SetErrorStringWithFormat( |
905 | 0 | "array index %ld is not valid for \"(%s) %s\"", child_index, |
906 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
907 | 0 | var_expr_path_strm.GetData()); |
908 | 0 | } |
909 | 878 | } else if (valobj_sp->GetCompilerType().IsScalarType()) { |
910 | | // this is a bitfield asking to display just one bit |
911 | 0 | child_valobj_sp = valobj_sp->GetSyntheticBitFieldChild( |
912 | 0 | child_index, child_index, true); |
913 | 0 | if (!child_valobj_sp) { |
914 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
915 | 0 | error.SetErrorStringWithFormat( |
916 | 0 | "bitfield range %ld-%ld is not valid for \"(%s) %s\"", |
917 | 0 | child_index, child_index, |
918 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
919 | 0 | var_expr_path_strm.GetData()); |
920 | 0 | } |
921 | 878 | } else { |
922 | 878 | ValueObjectSP synthetic = valobj_sp->GetSyntheticValue(); |
923 | 878 | if (no_synth_child /* synthetic is forbidden */ || |
924 | 878 | !synthetic /* no synthetic */ |
925 | 878 | || synthetic == valobj_sp) /* synthetic is the same as the |
926 | | original object */ |
927 | 0 | { |
928 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
929 | 0 | error.SetErrorStringWithFormat( |
930 | 0 | "\"(%s) %s\" is not an array type", |
931 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
932 | 0 | var_expr_path_strm.GetData()); |
933 | 878 | } else if ( |
934 | 878 | static_cast<uint32_t>(child_index) >= |
935 | 878 | synthetic |
936 | 878 | ->GetNumChildren() /* synthetic does not have that many values */) { |
937 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
938 | 0 | error.SetErrorStringWithFormat( |
939 | 0 | "array index %ld is not valid for \"(%s) %s\"", child_index, |
940 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
941 | 0 | var_expr_path_strm.GetData()); |
942 | 878 | } else { |
943 | 878 | child_valobj_sp = synthetic->GetChildAtIndex(child_index); |
944 | 878 | if (!child_valobj_sp) { |
945 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
946 | 0 | error.SetErrorStringWithFormat( |
947 | 0 | "array index %ld is not valid for \"(%s) %s\"", child_index, |
948 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
949 | 0 | var_expr_path_strm.GetData()); |
950 | 0 | } |
951 | 878 | } |
952 | 878 | } |
953 | | |
954 | 1.38k | if (!child_valobj_sp) { |
955 | | // Invalid array index... |
956 | 0 | return ValueObjectSP(); |
957 | 0 | } |
958 | | |
959 | 1.38k | if (use_dynamic != eNoDynamicValues) { |
960 | 494 | ValueObjectSP dynamic_value_sp( |
961 | 494 | child_valobj_sp->GetDynamicValue(use_dynamic)); |
962 | 494 | if (dynamic_value_sp) |
963 | 0 | child_valobj_sp = dynamic_value_sp; |
964 | 494 | } |
965 | | // Break out early from the switch since we were able to find the child |
966 | | // member |
967 | 1.38k | break; |
968 | 1.38k | } |
969 | | |
970 | | // this is most probably a BitField, let's take a look |
971 | 0 | if (index_expr.front() != '-') { |
972 | 0 | error.SetErrorStringWithFormat("invalid range expression \"'%s'\"", |
973 | 0 | original_index_expr.str().c_str()); |
974 | 0 | return ValueObjectSP(); |
975 | 0 | } |
976 | | |
977 | 0 | index_expr = index_expr.drop_front(); |
978 | 0 | long final_index = 0; |
979 | 0 | if (index_expr.getAsInteger(0, final_index)) { |
980 | 0 | error.SetErrorStringWithFormat("invalid range expression \"'%s'\"", |
981 | 0 | original_index_expr.str().c_str()); |
982 | 0 | return ValueObjectSP(); |
983 | 0 | } |
984 | | |
985 | | // if the format given is [high-low], swap range |
986 | 0 | if (child_index > final_index) { |
987 | 0 | long temp = child_index; |
988 | 0 | child_index = final_index; |
989 | 0 | final_index = temp; |
990 | 0 | } |
991 | |
|
992 | 0 | if (valobj_sp->GetCompilerType().IsPointerToScalarType() && deref) { |
993 | | // what we have is *ptr[low-high]. the most similar C++ syntax is to |
994 | | // deref ptr and extract bits low thru high out of it. reading array |
995 | | // items low thru high would be done by saying ptr[low-high], without a |
996 | | // deref * sign |
997 | 0 | Status error; |
998 | 0 | ValueObjectSP temp(valobj_sp->Dereference(error)); |
999 | 0 | if (error.Fail()) { |
1000 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
1001 | 0 | error.SetErrorStringWithFormat( |
1002 | 0 | "could not dereference \"(%s) %s\"", |
1003 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
1004 | 0 | var_expr_path_strm.GetData()); |
1005 | 0 | return ValueObjectSP(); |
1006 | 0 | } |
1007 | 0 | valobj_sp = temp; |
1008 | 0 | deref = false; |
1009 | 0 | } else if (valobj_sp->GetCompilerType().IsArrayOfScalarType() && deref) { |
1010 | | // what we have is *arr[low-high]. the most similar C++ syntax is to |
1011 | | // get arr[0] (an operation that is equivalent to deref-ing arr) and |
1012 | | // extract bits low thru high out of it. reading array items low thru |
1013 | | // high would be done by saying arr[low-high], without a deref * sign |
1014 | 0 | Status error; |
1015 | 0 | ValueObjectSP temp(valobj_sp->GetChildAtIndex(0)); |
1016 | 0 | if (error.Fail()) { |
1017 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
1018 | 0 | error.SetErrorStringWithFormat( |
1019 | 0 | "could not get item 0 for \"(%s) %s\"", |
1020 | 0 | valobj_sp->GetTypeName().AsCString("<invalid type>"), |
1021 | 0 | var_expr_path_strm.GetData()); |
1022 | 0 | return ValueObjectSP(); |
1023 | 0 | } |
1024 | 0 | valobj_sp = temp; |
1025 | 0 | deref = false; |
1026 | 0 | } |
1027 | | |
1028 | 0 | child_valobj_sp = |
1029 | 0 | valobj_sp->GetSyntheticBitFieldChild(child_index, final_index, true); |
1030 | 0 | if (!child_valobj_sp) { |
1031 | 0 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
1032 | 0 | error.SetErrorStringWithFormat( |
1033 | 0 | "bitfield range %ld-%ld is not valid for \"(%s) %s\"", child_index, |
1034 | 0 | final_index, valobj_sp->GetTypeName().AsCString("<invalid type>"), |
1035 | 0 | var_expr_path_strm.GetData()); |
1036 | 0 | } |
1037 | |
|
1038 | 0 | if (!child_valobj_sp) { |
1039 | | // Invalid bitfield range... |
1040 | 0 | return ValueObjectSP(); |
1041 | 0 | } |
1042 | | |
1043 | 0 | if (use_dynamic != eNoDynamicValues) { |
1044 | 0 | ValueObjectSP dynamic_value_sp( |
1045 | 0 | child_valobj_sp->GetDynamicValue(use_dynamic)); |
1046 | 0 | if (dynamic_value_sp) |
1047 | 0 | child_valobj_sp = dynamic_value_sp; |
1048 | 0 | } |
1049 | | // Break out early from the switch since we were able to find the child |
1050 | | // member |
1051 | 0 | break; |
1052 | 0 | } |
1053 | 1 | default: |
1054 | | // Failure... |
1055 | 1 | { |
1056 | 1 | valobj_sp->GetExpressionPath(var_expr_path_strm); |
1057 | 1 | error.SetErrorStringWithFormat( |
1058 | 1 | "unexpected char '%c' encountered after \"%s\" in \"%s\"", |
1059 | 1 | separator_type, var_expr_path_strm.GetData(), |
1060 | 1 | var_expr.str().c_str()); |
1061 | | |
1062 | 1 | return ValueObjectSP(); |
1063 | 0 | } |
1064 | 3.44k | } |
1065 | | |
1066 | 3.41k | if (child_valobj_sp) |
1067 | 3.41k | valobj_sp = child_valobj_sp; |
1068 | 3.41k | } |
1069 | 5.75k | if (valobj_sp) { |
1070 | 5.75k | if (deref) { |
1071 | 139 | ValueObjectSP deref_valobj_sp(valobj_sp->Dereference(error)); |
1072 | 139 | valobj_sp = deref_valobj_sp; |
1073 | 5.61k | } else if (address_of) { |
1074 | 4 | ValueObjectSP address_of_valobj_sp(valobj_sp->AddressOf(error)); |
1075 | 4 | valobj_sp = address_of_valobj_sp; |
1076 | 4 | } |
1077 | 5.75k | } |
1078 | 5.75k | return valobj_sp; |
1079 | 5.78k | } |
1080 | | |
1081 | 13.0k | bool StackFrame::GetFrameBaseValue(Scalar &frame_base, Status *error_ptr) { |
1082 | 13.0k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
1083 | 13.0k | if (!m_cfa_is_valid) { |
1084 | 0 | m_frame_base_error.SetErrorString( |
1085 | 0 | "No frame base available for this historical stack frame."); |
1086 | 0 | return false; |
1087 | 0 | } |
1088 | | |
1089 | 13.0k | if (m_flags.IsClear(GOT_FRAME_BASE)) { |
1090 | 3.58k | if (m_sc.function) { |
1091 | 3.58k | m_frame_base.Clear(); |
1092 | 3.58k | m_frame_base_error.Clear(); |
1093 | | |
1094 | 3.58k | m_flags.Set(GOT_FRAME_BASE); |
1095 | 3.58k | ExecutionContext exe_ctx(shared_from_this()); |
1096 | 3.58k | Value expr_value; |
1097 | 3.58k | addr_t loclist_base_addr = LLDB_INVALID_ADDRESS; |
1098 | 3.58k | if (!m_sc.function->GetFrameBaseExpression().IsAlwaysValidSingleExpr()) |
1099 | 0 | loclist_base_addr = |
1100 | 0 | m_sc.function->GetAddressRange().GetBaseAddress().GetLoadAddress( |
1101 | 0 | exe_ctx.GetTargetPtr()); |
1102 | | |
1103 | 3.58k | if (!m_sc.function->GetFrameBaseExpression().Evaluate( |
1104 | 3.58k | &exe_ctx, nullptr, loclist_base_addr, nullptr, nullptr, |
1105 | 3.58k | expr_value, &m_frame_base_error)) { |
1106 | | // We should really have an error if evaluate returns, but in case we |
1107 | | // don't, lets set the error to something at least. |
1108 | 14 | if (m_frame_base_error.Success()) |
1109 | 0 | m_frame_base_error.SetErrorString( |
1110 | 0 | "Evaluation of the frame base expression failed."); |
1111 | 3.57k | } else { |
1112 | 3.57k | m_frame_base = expr_value.ResolveValue(&exe_ctx); |
1113 | 3.57k | } |
1114 | 3.58k | } else { |
1115 | 0 | m_frame_base_error.SetErrorString("No function in symbol context."); |
1116 | 0 | } |
1117 | 3.58k | } |
1118 | | |
1119 | 13.0k | if (m_frame_base_error.Success()) |
1120 | 12.9k | frame_base = m_frame_base; |
1121 | | |
1122 | 13.0k | if (error_ptr) |
1123 | 13.0k | *error_ptr = m_frame_base_error; |
1124 | 13.0k | return m_frame_base_error.Success(); |
1125 | 13.0k | } |
1126 | | |
1127 | 336 | DWARFExpressionList *StackFrame::GetFrameBaseExpression(Status *error_ptr) { |
1128 | 336 | if (!m_sc.function) { |
1129 | 0 | if (error_ptr) { |
1130 | 0 | error_ptr->SetErrorString("No function in symbol context."); |
1131 | 0 | } |
1132 | 0 | return nullptr; |
1133 | 0 | } |
1134 | | |
1135 | 336 | return &m_sc.function->GetFrameBaseExpression(); |
1136 | 336 | } |
1137 | | |
1138 | 213k | RegisterContextSP StackFrame::GetRegisterContext() { |
1139 | 213k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
1140 | 213k | if (!m_reg_context_sp) { |
1141 | 181k | ThreadSP thread_sp(GetThread()); |
1142 | 181k | if (thread_sp) |
1143 | 181k | m_reg_context_sp = thread_sp->CreateRegisterContextForFrame(this); |
1144 | 181k | } |
1145 | 213k | return m_reg_context_sp; |
1146 | 213k | } |
1147 | | |
1148 | 73.4k | bool StackFrame::HasDebugInformation() { |
1149 | 73.4k | GetSymbolContext(eSymbolContextLineEntry); |
1150 | 73.4k | return m_sc.line_entry.IsValid(); |
1151 | 73.4k | } |
1152 | | |
1153 | | ValueObjectSP |
1154 | | StackFrame::GetValueObjectForFrameVariable(const VariableSP &variable_sp, |
1155 | 8.60k | DynamicValueType use_dynamic) { |
1156 | 8.60k | ValueObjectSP valobj_sp; |
1157 | 8.60k | { // Scope for stack frame mutex. We need to drop this mutex before we figure |
1158 | | // out the dynamic value. That will require converting the StackID in the |
1159 | | // VO back to a StackFrame, which will in turn require locking the |
1160 | | // StackFrameList. If we still hold the StackFrame mutex, we could suffer |
1161 | | // lock inversion against the pattern of getting the StackFrameList and |
1162 | | // then the stack frame, which is fairly common. |
1163 | 8.60k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
1164 | 8.60k | if (IsHistorical()) { |
1165 | 0 | return valobj_sp; |
1166 | 0 | } |
1167 | 8.60k | VariableList *var_list = GetVariableList(true, nullptr); |
1168 | 8.60k | if (var_list) { |
1169 | | // Make sure the variable is a frame variable |
1170 | 8.60k | const uint32_t var_idx = var_list->FindIndexForVariable(variable_sp.get()); |
1171 | 8.60k | const uint32_t num_variables = var_list->GetSize(); |
1172 | 8.60k | if (var_idx < num_variables) { |
1173 | 8.60k | valobj_sp = m_variable_list_value_objects.GetValueObjectAtIndex(var_idx); |
1174 | 8.60k | if (!valobj_sp) { |
1175 | 4.72k | if (m_variable_list_value_objects.GetSize() < num_variables) |
1176 | 1.56k | m_variable_list_value_objects.Resize(num_variables); |
1177 | 4.72k | valobj_sp = ValueObjectVariable::Create(this, variable_sp); |
1178 | 4.72k | m_variable_list_value_objects.SetValueObjectAtIndex(var_idx, |
1179 | 4.72k | valobj_sp); |
1180 | 4.72k | } |
1181 | 8.60k | } |
1182 | 8.60k | } |
1183 | 8.60k | } // End of StackFrame mutex scope. |
1184 | 8.60k | if (use_dynamic != eNoDynamicValues && valobj_sp4.37k ) { |
1185 | 4.37k | ValueObjectSP dynamic_sp = valobj_sp->GetDynamicValue(use_dynamic); |
1186 | 4.37k | if (dynamic_sp) |
1187 | 272 | return dynamic_sp; |
1188 | 4.37k | } |
1189 | 8.33k | return valobj_sp; |
1190 | 8.60k | } |
1191 | | |
1192 | 14.0k | bool StackFrame::IsInlined() { |
1193 | 14.0k | if (m_sc.block == nullptr) |
1194 | 5.19k | GetSymbolContext(eSymbolContextBlock); |
1195 | 14.0k | if (m_sc.block) |
1196 | 8.81k | return m_sc.block->GetContainingInlinedBlock() != nullptr; |
1197 | 5.19k | return false; |
1198 | 14.0k | } |
1199 | | |
1200 | 224k | bool StackFrame::IsHistorical() const { |
1201 | 224k | return m_stack_frame_kind == StackFrame::Kind::History; |
1202 | 224k | } |
1203 | | |
1204 | 4.71k | bool StackFrame::IsArtificial() const { |
1205 | 4.71k | return m_stack_frame_kind == StackFrame::Kind::Artificial; |
1206 | 4.71k | } |
1207 | | |
1208 | 7.63k | lldb::LanguageType StackFrame::GetLanguage() { |
1209 | 7.63k | CompileUnit *cu = GetSymbolContext(eSymbolContextCompUnit).comp_unit; |
1210 | 7.63k | if (cu) |
1211 | 7.56k | return cu->GetLanguage(); |
1212 | 65 | return lldb::eLanguageTypeUnknown; |
1213 | 7.63k | } |
1214 | | |
1215 | 1.66k | lldb::LanguageType StackFrame::GuessLanguage() { |
1216 | 1.66k | LanguageType lang_type = GetLanguage(); |
1217 | | |
1218 | 1.66k | if (lang_type == eLanguageTypeUnknown) { |
1219 | 5 | SymbolContext sc = GetSymbolContext(eSymbolContextFunction |
1220 | 5 | | eSymbolContextSymbol); |
1221 | 5 | if (sc.function) { |
1222 | 0 | lang_type = sc.function->GetMangled().GuessLanguage(); |
1223 | 0 | } |
1224 | 5 | else if (sc.symbol) |
1225 | 5 | { |
1226 | 5 | lang_type = sc.symbol->GetMangled().GuessLanguage(); |
1227 | 5 | } |
1228 | 5 | } |
1229 | | |
1230 | 1.66k | return lang_type; |
1231 | 1.66k | } |
1232 | | |
1233 | | namespace { |
1234 | | std::pair<const Instruction::Operand *, int64_t> |
1235 | | GetBaseExplainingValue(const Instruction::Operand &operand, |
1236 | 102 | RegisterContext ®ister_context, lldb::addr_t value) { |
1237 | 102 | switch (operand.m_type) { |
1238 | 0 | case Instruction::Operand::Type::Dereference: |
1239 | 0 | case Instruction::Operand::Type::Immediate: |
1240 | 0 | case Instruction::Operand::Type::Invalid: |
1241 | 0 | case Instruction::Operand::Type::Product: |
1242 | | // These are not currently interesting |
1243 | 0 | return std::make_pair(nullptr, 0); |
1244 | 24 | case Instruction::Operand::Type::Sum: { |
1245 | 24 | const Instruction::Operand *immediate_child = nullptr; |
1246 | 24 | const Instruction::Operand *variable_child = nullptr; |
1247 | 24 | if (operand.m_children[0].m_type == Instruction::Operand::Type::Immediate) { |
1248 | 24 | immediate_child = &operand.m_children[0]; |
1249 | 24 | variable_child = &operand.m_children[1]; |
1250 | 24 | } else if (0 operand.m_children[1].m_type == |
1251 | 0 | Instruction::Operand::Type::Immediate) { |
1252 | 0 | immediate_child = &operand.m_children[1]; |
1253 | 0 | variable_child = &operand.m_children[0]; |
1254 | 0 | } |
1255 | 24 | if (!immediate_child) { |
1256 | 0 | return std::make_pair(nullptr, 0); |
1257 | 0 | } |
1258 | 24 | lldb::addr_t adjusted_value = value; |
1259 | 24 | if (immediate_child->m_negative) { |
1260 | 0 | adjusted_value += immediate_child->m_immediate; |
1261 | 24 | } else { |
1262 | 24 | adjusted_value -= immediate_child->m_immediate; |
1263 | 24 | } |
1264 | 24 | std::pair<const Instruction::Operand *, int64_t> base_and_offset = |
1265 | 24 | GetBaseExplainingValue(*variable_child, register_context, |
1266 | 24 | adjusted_value); |
1267 | 24 | if (!base_and_offset.first) { |
1268 | 0 | return std::make_pair(nullptr, 0); |
1269 | 0 | } |
1270 | 24 | if (immediate_child->m_negative) { |
1271 | 0 | base_and_offset.second -= immediate_child->m_immediate; |
1272 | 24 | } else { |
1273 | 24 | base_and_offset.second += immediate_child->m_immediate; |
1274 | 24 | } |
1275 | 24 | return base_and_offset; |
1276 | 24 | } |
1277 | 78 | case Instruction::Operand::Type::Register: { |
1278 | 78 | const RegisterInfo *info = |
1279 | 78 | register_context.GetRegisterInfoByName(operand.m_register.AsCString()); |
1280 | 78 | if (!info) { |
1281 | 0 | return std::make_pair(nullptr, 0); |
1282 | 0 | } |
1283 | 78 | RegisterValue reg_value; |
1284 | 78 | if (!register_context.ReadRegister(info, reg_value)) { |
1285 | 0 | return std::make_pair(nullptr, 0); |
1286 | 0 | } |
1287 | 78 | if (reg_value.GetAsUInt64() == value) { |
1288 | 78 | return std::make_pair(&operand, 0); |
1289 | 78 | } else { |
1290 | 0 | return std::make_pair(nullptr, 0); |
1291 | 0 | } |
1292 | 78 | } |
1293 | 102 | } |
1294 | 0 | return std::make_pair(nullptr, 0); |
1295 | 102 | } |
1296 | | |
1297 | | std::pair<const Instruction::Operand *, int64_t> |
1298 | | GetBaseExplainingDereference(const Instruction::Operand &operand, |
1299 | | RegisterContext ®ister_context, |
1300 | 95 | lldb::addr_t addr) { |
1301 | 95 | if (operand.m_type == Instruction::Operand::Type::Dereference) { |
1302 | 78 | return GetBaseExplainingValue(operand.m_children[0], register_context, |
1303 | 78 | addr); |
1304 | 78 | } |
1305 | 17 | return std::make_pair(nullptr, 0); |
1306 | 95 | } |
1307 | | } |
1308 | | |
1309 | 78 | lldb::ValueObjectSP StackFrame::GuessValueForAddress(lldb::addr_t addr) { |
1310 | 78 | TargetSP target_sp = CalculateTarget(); |
1311 | | |
1312 | 78 | const ArchSpec &target_arch = target_sp->GetArchitecture(); |
1313 | | |
1314 | 78 | AddressRange pc_range; |
1315 | 78 | pc_range.GetBaseAddress() = GetFrameCodeAddress(); |
1316 | 78 | pc_range.SetByteSize(target_arch.GetMaximumOpcodeByteSize()); |
1317 | | |
1318 | 78 | const char *plugin_name = nullptr; |
1319 | 78 | const char *flavor = nullptr; |
1320 | 78 | const bool force_live_memory = true; |
1321 | | |
1322 | 78 | DisassemblerSP disassembler_sp = |
1323 | 78 | Disassembler::DisassembleRange(target_arch, plugin_name, flavor, |
1324 | 78 | *target_sp, pc_range, force_live_memory); |
1325 | | |
1326 | 78 | if (!disassembler_sp || !disassembler_sp->GetInstructionList().GetSize()) { |
1327 | 0 | return ValueObjectSP(); |
1328 | 0 | } |
1329 | | |
1330 | 78 | InstructionSP instruction_sp = |
1331 | 78 | disassembler_sp->GetInstructionList().GetInstructionAtIndex(0); |
1332 | | |
1333 | 78 | llvm::SmallVector<Instruction::Operand, 3> operands; |
1334 | | |
1335 | 78 | if (!instruction_sp->ParseOperands(operands)) { |
1336 | 0 | return ValueObjectSP(); |
1337 | 0 | } |
1338 | | |
1339 | 78 | RegisterContextSP register_context_sp = GetRegisterContext(); |
1340 | | |
1341 | 78 | if (!register_context_sp) { |
1342 | 0 | return ValueObjectSP(); |
1343 | 0 | } |
1344 | | |
1345 | 95 | for (const Instruction::Operand &operand : operands)78 { |
1346 | 95 | std::pair<const Instruction::Operand *, int64_t> base_and_offset = |
1347 | 95 | GetBaseExplainingDereference(operand, *register_context_sp, addr); |
1348 | | |
1349 | 95 | if (!base_and_offset.first) { |
1350 | 17 | continue; |
1351 | 17 | } |
1352 | | |
1353 | 78 | switch (base_and_offset.first->m_type) { |
1354 | 0 | case Instruction::Operand::Type::Immediate: { |
1355 | 0 | lldb_private::Address addr; |
1356 | 0 | if (target_sp->ResolveLoadAddress(base_and_offset.first->m_immediate + |
1357 | 0 | base_and_offset.second, |
1358 | 0 | addr)) { |
1359 | 0 | auto c_type_system_or_err = |
1360 | 0 | target_sp->GetScratchTypeSystemForLanguage(eLanguageTypeC); |
1361 | 0 | if (auto err = c_type_system_or_err.takeError()) { |
1362 | 0 | LLDB_LOG_ERROR(GetLog(LLDBLog::Thread), std::move(err), |
1363 | 0 | "Unable to guess value for given address: {0}"); |
1364 | 0 | return ValueObjectSP(); |
1365 | 0 | } else { |
1366 | 0 | auto ts = *c_type_system_or_err; |
1367 | 0 | if (!ts) |
1368 | 0 | return {}; |
1369 | 0 | CompilerType void_ptr_type = |
1370 | 0 | ts->GetBasicTypeFromAST(lldb::BasicType::eBasicTypeChar) |
1371 | 0 | .GetPointerType(); |
1372 | 0 | return ValueObjectMemory::Create(this, "", addr, void_ptr_type); |
1373 | 0 | } |
1374 | 0 | } else { |
1375 | 0 | return ValueObjectSP(); |
1376 | 0 | } |
1377 | 0 | break; |
1378 | 0 | } |
1379 | 78 | case Instruction::Operand::Type::Register: { |
1380 | 78 | return GuessValueForRegisterAndOffset(base_and_offset.first->m_register, |
1381 | 78 | base_and_offset.second); |
1382 | 0 | } |
1383 | 0 | default: |
1384 | 0 | return ValueObjectSP(); |
1385 | 78 | } |
1386 | 78 | } |
1387 | | |
1388 | 0 | return ValueObjectSP(); |
1389 | 78 | } |
1390 | | |
1391 | | namespace { |
1392 | | ValueObjectSP GetValueForOffset(StackFrame &frame, ValueObjectSP &parent, |
1393 | 134 | int64_t offset) { |
1394 | 134 | if (offset < 0 || uint64_t(offset) >= parent->GetByteSize()) { |
1395 | 0 | return ValueObjectSP(); |
1396 | 0 | } |
1397 | | |
1398 | 134 | if (parent->IsPointerOrReferenceType()) { |
1399 | 12 | return parent; |
1400 | 12 | } |
1401 | | |
1402 | 170 | for (int ci = 0, ce = parent->GetNumChildren(); 122 ci != ce; ++ci48 ) { |
1403 | 92 | ValueObjectSP child_sp = parent->GetChildAtIndex(ci); |
1404 | | |
1405 | 92 | if (!child_sp) { |
1406 | 0 | return ValueObjectSP(); |
1407 | 0 | } |
1408 | | |
1409 | 92 | int64_t child_offset = child_sp->GetByteOffset(); |
1410 | 92 | int64_t child_size = child_sp->GetByteSize().value_or(0); |
1411 | | |
1412 | 92 | if (offset >= child_offset && offset < (child_offset + child_size)80 ) { |
1413 | 44 | return GetValueForOffset(frame, child_sp, offset - child_offset); |
1414 | 44 | } |
1415 | 92 | } |
1416 | | |
1417 | 78 | if (offset == 0) { |
1418 | 78 | return parent; |
1419 | 78 | } else { |
1420 | 0 | return ValueObjectSP(); |
1421 | 0 | } |
1422 | 78 | } |
1423 | | |
1424 | | ValueObjectSP GetValueForDereferincingOffset(StackFrame &frame, |
1425 | | ValueObjectSP &base, |
1426 | 90 | int64_t offset) { |
1427 | | // base is a pointer to something |
1428 | | // offset is the thing to add to the pointer We return the most sensible |
1429 | | // ValueObject for the result of *(base+offset) |
1430 | | |
1431 | 90 | if (!base->IsPointerOrReferenceType()) { |
1432 | 0 | return ValueObjectSP(); |
1433 | 0 | } |
1434 | | |
1435 | 90 | Status error; |
1436 | 90 | ValueObjectSP pointee = base->Dereference(error); |
1437 | | |
1438 | 90 | if (!pointee) { |
1439 | 0 | return ValueObjectSP(); |
1440 | 0 | } |
1441 | | |
1442 | 90 | if (offset >= 0 && uint64_t(offset) >= pointee->GetByteSize()) { |
1443 | 4 | int64_t index = offset / pointee->GetByteSize().value_or(1); |
1444 | 4 | offset = offset % pointee->GetByteSize().value_or(1); |
1445 | 4 | const bool can_create = true; |
1446 | 4 | pointee = base->GetSyntheticArrayMember(index, can_create); |
1447 | 4 | } |
1448 | | |
1449 | 90 | if (!pointee || error.Fail()) { |
1450 | 0 | return ValueObjectSP(); |
1451 | 0 | } |
1452 | | |
1453 | 90 | return GetValueForOffset(frame, pointee, offset); |
1454 | 90 | } |
1455 | | |
1456 | | /// Attempt to reconstruct the ValueObject for the address contained in a |
1457 | | /// given register plus an offset. |
1458 | | /// |
1459 | | /// \param [in] frame |
1460 | | /// The current stack frame. |
1461 | | /// |
1462 | | /// \param [in] reg |
1463 | | /// The register. |
1464 | | /// |
1465 | | /// \param [in] offset |
1466 | | /// The offset from the register. |
1467 | | /// |
1468 | | /// \param [in] disassembler |
1469 | | /// A disassembler containing instructions valid up to the current PC. |
1470 | | /// |
1471 | | /// \param [in] variables |
1472 | | /// The variable list from the current frame, |
1473 | | /// |
1474 | | /// \param [in] pc |
1475 | | /// The program counter for the instruction considered the 'user'. |
1476 | | /// |
1477 | | /// \return |
1478 | | /// A string describing the base for the ExpressionPath. This could be a |
1479 | | /// variable, a register value, an argument, or a function return value. |
1480 | | /// The ValueObject if found. If valid, it has a valid ExpressionPath. |
1481 | | lldb::ValueObjectSP DoGuessValueAt(StackFrame &frame, ConstString reg, |
1482 | | int64_t offset, Disassembler &disassembler, |
1483 | 164 | VariableList &variables, const Address &pc) { |
1484 | | // Example of operation for Intel: |
1485 | | // |
1486 | | // +14: movq -0x8(%rbp), %rdi |
1487 | | // +18: movq 0x8(%rdi), %rdi |
1488 | | // +22: addl 0x4(%rdi), %eax |
1489 | | // |
1490 | | // f, a pointer to a struct, is known to be at -0x8(%rbp). |
1491 | | // |
1492 | | // DoGuessValueAt(frame, rdi, 4, dis, vars, 0x22) finds the instruction at |
1493 | | // +18 that assigns to rdi, and calls itself recursively for that dereference |
1494 | | // DoGuessValueAt(frame, rdi, 8, dis, vars, 0x18) finds the instruction at |
1495 | | // +14 that assigns to rdi, and calls itself recursively for that |
1496 | | // dereference |
1497 | | // DoGuessValueAt(frame, rbp, -8, dis, vars, 0x14) finds "f" in the |
1498 | | // variable list. |
1499 | | // Returns a ValueObject for f. (That's what was stored at rbp-8 at +14) |
1500 | | // Returns a ValueObject for *(f+8) or f->b (That's what was stored at rdi+8 |
1501 | | // at +18) |
1502 | | // Returns a ValueObject for *(f->b+4) or f->b->a (That's what was stored at |
1503 | | // rdi+4 at +22) |
1504 | | |
1505 | | // First, check the variable list to see if anything is at the specified |
1506 | | // location. |
1507 | | |
1508 | 164 | using namespace OperandMatchers; |
1509 | | |
1510 | 164 | const RegisterInfo *reg_info = |
1511 | 164 | frame.GetRegisterContext()->GetRegisterInfoByName(reg.AsCString()); |
1512 | 164 | if (!reg_info) { |
1513 | 0 | return ValueObjectSP(); |
1514 | 0 | } |
1515 | | |
1516 | 164 | Instruction::Operand op = |
1517 | 164 | offset ? Instruction::Operand::BuildDereference( |
1518 | 110 | Instruction::Operand::BuildSum( |
1519 | 110 | Instruction::Operand::BuildRegister(reg), |
1520 | 110 | Instruction::Operand::BuildImmediate(offset))) |
1521 | 164 | : Instruction::Operand::BuildDereference( |
1522 | 54 | Instruction::Operand::BuildRegister(reg)); |
1523 | | |
1524 | 336 | for (VariableSP var_sp : variables) { |
1525 | 336 | if (var_sp->LocationExpressionList().MatchesOperand(frame, op)) |
1526 | 74 | return frame.GetValueObjectForFrameVariable(var_sp, eNoDynamicValues); |
1527 | 336 | } |
1528 | | |
1529 | 90 | const uint32_t current_inst = |
1530 | 90 | disassembler.GetInstructionList().GetIndexOfInstructionAtAddress(pc); |
1531 | 90 | if (current_inst == UINT32_MAX) { |
1532 | 0 | return ValueObjectSP(); |
1533 | 0 | } |
1534 | | |
1535 | 98 | for (uint32_t ii = current_inst - 1; 90 ii != (uint32_t)-1; --ii8 ) { |
1536 | | // This is not an exact algorithm, and it sacrifices accuracy for |
1537 | | // generality. Recognizing "mov" and "ld" instructions –– and which |
1538 | | // are their source and destination operands -- is something the |
1539 | | // disassembler should do for us. |
1540 | 98 | InstructionSP instruction_sp = |
1541 | 98 | disassembler.GetInstructionList().GetInstructionAtIndex(ii); |
1542 | | |
1543 | 98 | if (instruction_sp->IsCall()) { |
1544 | 4 | ABISP abi_sp = frame.CalculateProcess()->GetABI(); |
1545 | 4 | if (!abi_sp) { |
1546 | 0 | continue; |
1547 | 0 | } |
1548 | | |
1549 | 4 | const char *return_register_name; |
1550 | 4 | if (!abi_sp->GetPointerReturnRegister(return_register_name)) { |
1551 | 0 | continue; |
1552 | 0 | } |
1553 | | |
1554 | 4 | const RegisterInfo *return_register_info = |
1555 | 4 | frame.GetRegisterContext()->GetRegisterInfoByName( |
1556 | 4 | return_register_name); |
1557 | 4 | if (!return_register_info) { |
1558 | 0 | continue; |
1559 | 0 | } |
1560 | | |
1561 | 4 | int64_t offset = 0; |
1562 | | |
1563 | 4 | if (!MatchUnaryOp(MatchOpType(Instruction::Operand::Type::Dereference), |
1564 | 4 | MatchRegOp(*return_register_info))(op) && |
1565 | 4 | !MatchUnaryOp( |
1566 | 4 | MatchOpType(Instruction::Operand::Type::Dereference), |
1567 | 4 | MatchBinaryOp(MatchOpType(Instruction::Operand::Type::Sum), |
1568 | 4 | MatchRegOp(*return_register_info), |
1569 | 4 | FetchImmOp(offset)))(op)) { |
1570 | 0 | continue; |
1571 | 0 | } |
1572 | | |
1573 | 4 | llvm::SmallVector<Instruction::Operand, 1> operands; |
1574 | 4 | if (!instruction_sp->ParseOperands(operands) || operands.size() != 1) { |
1575 | 0 | continue; |
1576 | 0 | } |
1577 | | |
1578 | 4 | switch (operands[0].m_type) { |
1579 | 0 | default: |
1580 | 0 | break; |
1581 | 4 | case Instruction::Operand::Type::Immediate: { |
1582 | 4 | SymbolContext sc; |
1583 | 4 | Address load_address; |
1584 | 4 | if (!frame.CalculateTarget()->ResolveLoadAddress( |
1585 | 4 | operands[0].m_immediate, load_address)) { |
1586 | 0 | break; |
1587 | 0 | } |
1588 | 4 | frame.CalculateTarget()->GetImages().ResolveSymbolContextForAddress( |
1589 | 4 | load_address, eSymbolContextFunction, sc); |
1590 | 4 | if (!sc.function) { |
1591 | 0 | break; |
1592 | 0 | } |
1593 | 4 | CompilerType function_type = sc.function->GetCompilerType(); |
1594 | 4 | if (!function_type.IsFunctionType()) { |
1595 | 0 | break; |
1596 | 0 | } |
1597 | 4 | CompilerType return_type = function_type.GetFunctionReturnType(); |
1598 | 4 | RegisterValue return_value; |
1599 | 4 | if (!frame.GetRegisterContext()->ReadRegister(return_register_info, |
1600 | 4 | return_value)) { |
1601 | 0 | break; |
1602 | 0 | } |
1603 | 4 | std::string name_str( |
1604 | 4 | sc.function->GetName().AsCString("<unknown function>")); |
1605 | 4 | name_str.append("()"); |
1606 | 4 | Address return_value_address(return_value.GetAsUInt64()); |
1607 | 4 | ValueObjectSP return_value_sp = ValueObjectMemory::Create( |
1608 | 4 | &frame, name_str, return_value_address, return_type); |
1609 | 4 | return GetValueForDereferincingOffset(frame, return_value_sp, offset); |
1610 | 4 | } |
1611 | 4 | } |
1612 | | |
1613 | 0 | continue; |
1614 | 4 | } |
1615 | | |
1616 | 94 | llvm::SmallVector<Instruction::Operand, 2> operands; |
1617 | 94 | if (!instruction_sp->ParseOperands(operands) || operands.size() != 2) { |
1618 | 0 | continue; |
1619 | 0 | } |
1620 | | |
1621 | 94 | Instruction::Operand *origin_operand = nullptr; |
1622 | 188 | auto clobbered_reg_matcher = [reg_info](const Instruction::Operand &op) { |
1623 | 188 | return MatchRegOp(*reg_info)(op) && op.m_clobbered90 ; |
1624 | 188 | }; |
1625 | | |
1626 | 94 | if (clobbered_reg_matcher(operands[0])) { |
1627 | 0 | origin_operand = &operands[1]; |
1628 | 0 | } |
1629 | 94 | else if (clobbered_reg_matcher(operands[1])) { |
1630 | 86 | origin_operand = &operands[0]; |
1631 | 86 | } |
1632 | 8 | else { |
1633 | 8 | continue; |
1634 | 8 | } |
1635 | | |
1636 | | // We have an origin operand. Can we track its value down? |
1637 | 86 | ValueObjectSP source_path; |
1638 | 86 | ConstString origin_register; |
1639 | 86 | int64_t origin_offset = 0; |
1640 | | |
1641 | 86 | if (FetchRegOp(origin_register)(*origin_operand)) { |
1642 | 0 | source_path = DoGuessValueAt(frame, origin_register, 0, disassembler, |
1643 | 0 | variables, instruction_sp->GetAddress()); |
1644 | 86 | } else if (MatchUnaryOp( |
1645 | 86 | MatchOpType(Instruction::Operand::Type::Dereference), |
1646 | 86 | FetchRegOp(origin_register))(*origin_operand) || |
1647 | 86 | MatchUnaryOp( |
1648 | 86 | MatchOpType(Instruction::Operand::Type::Dereference), |
1649 | 86 | MatchBinaryOp(MatchOpType(Instruction::Operand::Type::Sum), |
1650 | 86 | FetchRegOp(origin_register), |
1651 | 86 | FetchImmOp(origin_offset)))(*origin_operand)) { |
1652 | 86 | source_path = |
1653 | 86 | DoGuessValueAt(frame, origin_register, origin_offset, disassembler, |
1654 | 86 | variables, instruction_sp->GetAddress()); |
1655 | 86 | if (!source_path) { |
1656 | 0 | continue; |
1657 | 0 | } |
1658 | 86 | source_path = |
1659 | 86 | GetValueForDereferincingOffset(frame, source_path, offset); |
1660 | 86 | } |
1661 | | |
1662 | 86 | if (source_path) { |
1663 | 86 | return source_path; |
1664 | 86 | } |
1665 | 86 | } |
1666 | | |
1667 | 0 | return ValueObjectSP(); |
1668 | 90 | } |
1669 | | } |
1670 | | |
1671 | | lldb::ValueObjectSP StackFrame::GuessValueForRegisterAndOffset(ConstString reg, |
1672 | 78 | int64_t offset) { |
1673 | 78 | TargetSP target_sp = CalculateTarget(); |
1674 | | |
1675 | 78 | const ArchSpec &target_arch = target_sp->GetArchitecture(); |
1676 | | |
1677 | 78 | Block *frame_block = GetFrameBlock(); |
1678 | | |
1679 | 78 | if (!frame_block) { |
1680 | 0 | return ValueObjectSP(); |
1681 | 0 | } |
1682 | | |
1683 | 78 | Function *function = frame_block->CalculateSymbolContextFunction(); |
1684 | 78 | if (!function) { |
1685 | 0 | return ValueObjectSP(); |
1686 | 0 | } |
1687 | | |
1688 | 78 | AddressRange pc_range = function->GetAddressRange(); |
1689 | | |
1690 | 78 | if (GetFrameCodeAddress().GetFileAddress() < |
1691 | 78 | pc_range.GetBaseAddress().GetFileAddress() || |
1692 | 78 | GetFrameCodeAddress().GetFileAddress() - |
1693 | 78 | pc_range.GetBaseAddress().GetFileAddress() >= |
1694 | 78 | pc_range.GetByteSize()) { |
1695 | 0 | return ValueObjectSP(); |
1696 | 0 | } |
1697 | | |
1698 | 78 | const char *plugin_name = nullptr; |
1699 | 78 | const char *flavor = nullptr; |
1700 | 78 | const bool force_live_memory = true; |
1701 | 78 | DisassemblerSP disassembler_sp = |
1702 | 78 | Disassembler::DisassembleRange(target_arch, plugin_name, flavor, |
1703 | 78 | *target_sp, pc_range, force_live_memory); |
1704 | | |
1705 | 78 | if (!disassembler_sp || !disassembler_sp->GetInstructionList().GetSize()) { |
1706 | 0 | return ValueObjectSP(); |
1707 | 0 | } |
1708 | | |
1709 | 78 | const bool get_file_globals = false; |
1710 | 78 | VariableList *variables = GetVariableList(get_file_globals, nullptr); |
1711 | | |
1712 | 78 | if (!variables) { |
1713 | 0 | return ValueObjectSP(); |
1714 | 0 | } |
1715 | | |
1716 | 78 | return DoGuessValueAt(*this, reg, offset, *disassembler_sp, *variables, |
1717 | 78 | GetFrameCodeAddress()); |
1718 | 78 | } |
1719 | | |
1720 | 3.47k | lldb::ValueObjectSP StackFrame::FindVariable(ConstString name) { |
1721 | 3.47k | ValueObjectSP value_sp; |
1722 | | |
1723 | 3.47k | if (!name) |
1724 | 0 | return value_sp; |
1725 | | |
1726 | 3.47k | TargetSP target_sp = CalculateTarget(); |
1727 | 3.47k | ProcessSP process_sp = CalculateProcess(); |
1728 | | |
1729 | 3.47k | if (!target_sp && !process_sp0 ) |
1730 | 0 | return value_sp; |
1731 | | |
1732 | 3.47k | VariableList variable_list; |
1733 | 3.47k | VariableSP var_sp; |
1734 | 3.47k | SymbolContext sc(GetSymbolContext(eSymbolContextBlock)); |
1735 | | |
1736 | 3.47k | if (sc.block) { |
1737 | 3.47k | const bool can_create = true; |
1738 | 3.47k | const bool get_parent_variables = true; |
1739 | 3.47k | const bool stop_if_block_is_inlined_function = true; |
1740 | | |
1741 | 3.47k | if (sc.block->AppendVariables( |
1742 | 3.47k | can_create, get_parent_variables, stop_if_block_is_inlined_function, |
1743 | 15.5k | [this](Variable *v) { return v->IsInScope(this); }, |
1744 | 3.47k | &variable_list)) { |
1745 | 3.19k | var_sp = variable_list.FindVariable(name); |
1746 | 3.19k | } |
1747 | | |
1748 | 3.47k | if (var_sp) |
1749 | 993 | value_sp = GetValueObjectForFrameVariable(var_sp, eNoDynamicValues); |
1750 | 3.47k | } |
1751 | | |
1752 | 3.47k | return value_sp; |
1753 | 3.47k | } |
1754 | | |
1755 | 703k | TargetSP StackFrame::CalculateTarget() { |
1756 | 703k | TargetSP target_sp; |
1757 | 703k | ThreadSP thread_sp(GetThread()); |
1758 | 703k | if (thread_sp) { |
1759 | 703k | ProcessSP process_sp(thread_sp->CalculateProcess()); |
1760 | 703k | if (process_sp) |
1761 | 703k | target_sp = process_sp->CalculateTarget(); |
1762 | 703k | } |
1763 | 703k | return target_sp; |
1764 | 703k | } |
1765 | | |
1766 | 4.28k | ProcessSP StackFrame::CalculateProcess() { |
1767 | 4.28k | ProcessSP process_sp; |
1768 | 4.28k | ThreadSP thread_sp(GetThread()); |
1769 | 4.28k | if (thread_sp) |
1770 | 4.28k | process_sp = thread_sp->CalculateProcess(); |
1771 | 4.28k | return process_sp; |
1772 | 4.28k | } |
1773 | | |
1774 | 88.9k | ThreadSP StackFrame::CalculateThread() { return GetThread(); } |
1775 | | |
1776 | 9.35k | StackFrameSP StackFrame::CalculateStackFrame() { return shared_from_this(); } |
1777 | | |
1778 | 67.0k | void StackFrame::CalculateExecutionContext(ExecutionContext &exe_ctx) { |
1779 | 67.0k | exe_ctx.SetContext(shared_from_this()); |
1780 | 67.0k | } |
1781 | | |
1782 | | void StackFrame::DumpUsingSettingsFormat(Stream *strm, bool show_unique, |
1783 | 4.40k | const char *frame_marker) { |
1784 | 4.40k | if (strm == nullptr) |
1785 | 0 | return; |
1786 | | |
1787 | 4.40k | GetSymbolContext(eSymbolContextEverything); |
1788 | 4.40k | ExecutionContext exe_ctx(shared_from_this()); |
1789 | 4.40k | StreamString s; |
1790 | | |
1791 | 4.40k | if (frame_marker) |
1792 | 1.22k | s.PutCString(frame_marker); |
1793 | | |
1794 | 4.40k | const FormatEntity::Entry *frame_format = nullptr; |
1795 | 4.40k | Target *target = exe_ctx.GetTargetPtr(); |
1796 | 4.40k | if (target) { |
1797 | 4.40k | if (show_unique) { |
1798 | 0 | frame_format = target->GetDebugger().GetFrameFormatUnique(); |
1799 | 4.40k | } else { |
1800 | 4.40k | frame_format = target->GetDebugger().GetFrameFormat(); |
1801 | 4.40k | } |
1802 | 4.40k | } |
1803 | 4.40k | if (frame_format && FormatEntity::Format(*frame_format, s, &m_sc, &exe_ctx, |
1804 | 4.40k | nullptr, nullptr, false, false)) { |
1805 | 4.39k | strm->PutCString(s.GetString()); |
1806 | 4.39k | } else { |
1807 | 5 | Dump(strm, true, false); |
1808 | 5 | strm->EOL(); |
1809 | 5 | } |
1810 | 4.40k | } |
1811 | | |
1812 | | void StackFrame::Dump(Stream *strm, bool show_frame_index, |
1813 | 11 | bool show_fullpaths) { |
1814 | 11 | if (strm == nullptr) |
1815 | 0 | return; |
1816 | | |
1817 | 11 | if (show_frame_index) |
1818 | 5 | strm->Printf("frame #%u: ", m_frame_index); |
1819 | 11 | ExecutionContext exe_ctx(shared_from_this()); |
1820 | 11 | Target *target = exe_ctx.GetTargetPtr(); |
1821 | 11 | strm->Printf("0x%0*" PRIx64 " ", |
1822 | 11 | target ? (target->GetArchitecture().GetAddressByteSize() * 2) |
1823 | 11 | : 160 , |
1824 | 11 | GetFrameCodeAddress().GetLoadAddress(target)); |
1825 | 11 | GetSymbolContext(eSymbolContextEverything); |
1826 | 11 | const bool show_module = true; |
1827 | 11 | const bool show_inline = true; |
1828 | 11 | const bool show_function_arguments = true; |
1829 | 11 | const bool show_function_name = true; |
1830 | 11 | m_sc.DumpStopContext(strm, exe_ctx.GetBestExecutionContextScope(), |
1831 | 11 | GetFrameCodeAddress(), show_fullpaths, show_module, |
1832 | 11 | show_inline, show_function_arguments, |
1833 | 11 | show_function_name); |
1834 | 11 | } |
1835 | | |
1836 | 0 | void StackFrame::UpdateCurrentFrameFromPreviousFrame(StackFrame &prev_frame) { |
1837 | 0 | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
1838 | 0 | assert(GetStackID() == |
1839 | 0 | prev_frame.GetStackID()); // TODO: remove this after some testing |
1840 | 0 | m_variable_list_sp = prev_frame.m_variable_list_sp; |
1841 | 0 | m_variable_list_value_objects.Swap(prev_frame.m_variable_list_value_objects); |
1842 | 0 | if (!m_disassembly.GetString().empty()) { |
1843 | 0 | m_disassembly.Clear(); |
1844 | 0 | m_disassembly.PutCString(prev_frame.m_disassembly.GetString()); |
1845 | 0 | } |
1846 | 0 | } |
1847 | | |
1848 | 4.09k | void StackFrame::UpdatePreviousFrameFromCurrentFrame(StackFrame &curr_frame) { |
1849 | 4.09k | std::lock_guard<std::recursive_mutex> guard(m_mutex); |
1850 | 4.09k | assert(GetStackID() == |
1851 | 4.09k | curr_frame.GetStackID()); // TODO: remove this after some testing |
1852 | 4.09k | m_id.SetPC(curr_frame.m_id.GetPC()); // Update the Stack ID PC value |
1853 | 4.09k | assert(GetThread() == curr_frame.GetThread()); |
1854 | 4.09k | m_frame_index = curr_frame.m_frame_index; |
1855 | 4.09k | m_concrete_frame_index = curr_frame.m_concrete_frame_index; |
1856 | 4.09k | m_reg_context_sp = curr_frame.m_reg_context_sp; |
1857 | 4.09k | m_frame_code_addr = curr_frame.m_frame_code_addr; |
1858 | 4.09k | m_behaves_like_zeroth_frame = curr_frame.m_behaves_like_zeroth_frame; |
1859 | 4.09k | assert(!m_sc.target_sp || !curr_frame.m_sc.target_sp || |
1860 | 4.09k | m_sc.target_sp.get() == curr_frame.m_sc.target_sp.get()); |
1861 | 4.09k | assert(!m_sc.module_sp || !curr_frame.m_sc.module_sp || |
1862 | 4.09k | m_sc.module_sp.get() == curr_frame.m_sc.module_sp.get()); |
1863 | 4.09k | assert(m_sc.comp_unit == nullptr || curr_frame.m_sc.comp_unit == nullptr || |
1864 | 4.09k | m_sc.comp_unit == curr_frame.m_sc.comp_unit); |
1865 | 4.09k | assert(m_sc.function == nullptr || curr_frame.m_sc.function == nullptr || |
1866 | 4.09k | m_sc.function == curr_frame.m_sc.function); |
1867 | 4.09k | m_sc = curr_frame.m_sc; |
1868 | 4.09k | m_flags.Clear(GOT_FRAME_BASE | eSymbolContextEverything); |
1869 | 4.09k | m_flags.Set(m_sc.GetResolvedMask()); |
1870 | 4.09k | m_frame_base.Clear(); |
1871 | 4.09k | m_frame_base_error.Clear(); |
1872 | 4.09k | } |
1873 | | |
1874 | 0 | bool StackFrame::HasCachedData() const { |
1875 | 0 | if (m_variable_list_sp) |
1876 | 0 | return true; |
1877 | 0 | if (m_variable_list_value_objects.GetSize() > 0) |
1878 | 0 | return true; |
1879 | 0 | if (!m_disassembly.GetString().empty()) |
1880 | 0 | return true; |
1881 | 0 | return false; |
1882 | 0 | } |
1883 | | |
1884 | | bool StackFrame::GetStatus(Stream &strm, bool show_frame_info, bool show_source, |
1885 | 3.52k | bool show_unique, const char *frame_marker) { |
1886 | 3.52k | if (show_frame_info) { |
1887 | 3.52k | strm.Indent(); |
1888 | 3.52k | DumpUsingSettingsFormat(&strm, show_unique, frame_marker); |
1889 | 3.52k | } |
1890 | | |
1891 | 3.52k | if (show_source) { |
1892 | 1.60k | ExecutionContext exe_ctx(shared_from_this()); |
1893 | 1.60k | bool have_source = false, have_debuginfo = false; |
1894 | 1.60k | Debugger::StopDisassemblyType disasm_display = |
1895 | 1.60k | Debugger::eStopDisassemblyTypeNever; |
1896 | 1.60k | Target *target = exe_ctx.GetTargetPtr(); |
1897 | 1.60k | if (target) { |
1898 | 1.60k | Debugger &debugger = target->GetDebugger(); |
1899 | 1.60k | const uint32_t source_lines_before = |
1900 | 1.60k | debugger.GetStopSourceLineCount(true); |
1901 | 1.60k | const uint32_t source_lines_after = |
1902 | 1.60k | debugger.GetStopSourceLineCount(false); |
1903 | 1.60k | disasm_display = debugger.GetStopDisassemblyDisplay(); |
1904 | | |
1905 | 1.60k | GetSymbolContext(eSymbolContextCompUnit | eSymbolContextLineEntry); |
1906 | 1.60k | if (m_sc.comp_unit && m_sc.line_entry.IsValid()1.48k ) { |
1907 | 1.48k | have_debuginfo = true; |
1908 | 1.48k | if (source_lines_before > 0 || source_lines_after > 02 ) { |
1909 | 1.48k | uint32_t start_line = m_sc.line_entry.line; |
1910 | 1.48k | if (!start_line && m_sc.function1 ) { |
1911 | 1 | FileSpec source_file; |
1912 | 1 | m_sc.function->GetStartLineSourceInfo(source_file, start_line); |
1913 | 1 | } |
1914 | | |
1915 | 1.48k | size_t num_lines = |
1916 | 1.48k | target->GetSourceManager().DisplaySourceLinesWithLineNumbers( |
1917 | 1.48k | m_sc.line_entry.file, start_line, m_sc.line_entry.column, |
1918 | 1.48k | source_lines_before, source_lines_after, "->", &strm); |
1919 | 1.48k | if (num_lines != 0) |
1920 | 1.48k | have_source = true; |
1921 | | // TODO: Give here a one time warning if source file is missing. |
1922 | 1.48k | if (!m_sc.line_entry.line) { |
1923 | 1 | ConstString fn_name = m_sc.GetFunctionName(); |
1924 | | |
1925 | 1 | if (!fn_name.IsEmpty()) |
1926 | 1 | strm.Printf( |
1927 | 1 | "Note: this address is compiler-generated code in function " |
1928 | 1 | "%s that has no source code associated with it.", |
1929 | 1 | fn_name.AsCString()); |
1930 | 0 | else |
1931 | 0 | strm.Printf("Note: this address is compiler-generated code that " |
1932 | 0 | "has no source code associated with it."); |
1933 | 1 | strm.EOL(); |
1934 | 1 | } |
1935 | 1.48k | } |
1936 | 1.48k | } |
1937 | 1.60k | switch (disasm_display) { |
1938 | 0 | case Debugger::eStopDisassemblyTypeNever: |
1939 | 0 | break; |
1940 | | |
1941 | 1.60k | case Debugger::eStopDisassemblyTypeNoDebugInfo: |
1942 | 1.60k | if (have_debuginfo) |
1943 | 1.48k | break; |
1944 | 1.60k | [[fallthrough]];116 |
1945 | | |
1946 | 116 | case Debugger::eStopDisassemblyTypeNoSource: |
1947 | 116 | if (have_source) |
1948 | 0 | break; |
1949 | 116 | [[fallthrough]]; |
1950 | | |
1951 | 116 | case Debugger::eStopDisassemblyTypeAlways: |
1952 | 116 | if (target) { |
1953 | 116 | const uint32_t disasm_lines = debugger.GetDisassemblyLineCount(); |
1954 | 116 | if (disasm_lines > 0) { |
1955 | 116 | const ArchSpec &target_arch = target->GetArchitecture(); |
1956 | 116 | const char *plugin_name = nullptr; |
1957 | 116 | const char *flavor = nullptr; |
1958 | 116 | const bool mixed_source_and_assembly = false; |
1959 | 116 | Disassembler::Disassemble( |
1960 | 116 | target->GetDebugger(), target_arch, plugin_name, flavor, |
1961 | 116 | exe_ctx, GetFrameCodeAddress(), |
1962 | 116 | {Disassembler::Limit::Instructions, disasm_lines}, |
1963 | 116 | mixed_source_and_assembly, 0, |
1964 | 116 | Disassembler::eOptionMarkPCAddress, strm); |
1965 | 116 | } |
1966 | 116 | } |
1967 | 116 | break; |
1968 | 1.60k | } |
1969 | 1.60k | } |
1970 | 1.60k | } |
1971 | 3.52k | return true; |
1972 | 3.52k | } |
1973 | | |
1974 | 8.59k | RecognizedStackFrameSP StackFrame::GetRecognizedFrame() { |
1975 | 8.59k | if (!m_recognized_frame_sp) { |
1976 | 8.56k | m_recognized_frame_sp = GetThread() |
1977 | 8.56k | ->GetProcess() |
1978 | 8.56k | ->GetTarget() |
1979 | 8.56k | .GetFrameRecognizerManager() |
1980 | 8.56k | .RecognizeFrame(CalculateStackFrame()); |
1981 | 8.56k | } |
1982 | 8.59k | return m_recognized_frame_sp; |
1983 | 8.59k | } |