1 //===-- Function.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/Symbol/Function.h"
10 #include "lldb/Core/Debugger.h"
11 #include "lldb/Core/Disassembler.h"
12 #include "lldb/Core/Module.h"
13 #include "lldb/Core/ModuleList.h"
14 #include "lldb/Core/Section.h"
15 #include "lldb/Host/Host.h"
16 #include "lldb/Symbol/CompileUnit.h"
17 #include "lldb/Symbol/CompilerType.h"
18 #include "lldb/Symbol/LineTable.h"
19 #include "lldb/Symbol/SymbolFile.h"
20 #include "lldb/Target/Language.h"
21 #include "lldb/Target/Target.h"
22 #include "lldb/Utility/LLDBLog.h"
23 #include "lldb/Utility/Log.h"
24 #include "llvm/Support/Casting.h"
25
26 using namespace lldb;
27 using namespace lldb_private;
28
29 // Basic function information is contained in the FunctionInfo class. It is
30 // designed to contain the name, linkage name, and declaration location.
FunctionInfo(const char * name,const Declaration * decl_ptr)31 FunctionInfo::FunctionInfo(const char *name, const Declaration *decl_ptr)
32 : m_name(name), m_declaration(decl_ptr) {}
33
FunctionInfo(ConstString name,const Declaration * decl_ptr)34 FunctionInfo::FunctionInfo(ConstString name, const Declaration *decl_ptr)
35 : m_name(name), m_declaration(decl_ptr) {}
36
37 FunctionInfo::~FunctionInfo() = default;
38
Dump(Stream * s,bool show_fullpaths) const39 void FunctionInfo::Dump(Stream *s, bool show_fullpaths) const {
40 if (m_name)
41 *s << ", name = \"" << m_name << "\"";
42 m_declaration.Dump(s, show_fullpaths);
43 }
44
Compare(const FunctionInfo & a,const FunctionInfo & b)45 int FunctionInfo::Compare(const FunctionInfo &a, const FunctionInfo &b) {
46 int result = ConstString::Compare(a.GetName(), b.GetName());
47 if (result)
48 return result;
49
50 return Declaration::Compare(a.m_declaration, b.m_declaration);
51 }
52
GetDeclaration()53 Declaration &FunctionInfo::GetDeclaration() { return m_declaration; }
54
GetDeclaration() const55 const Declaration &FunctionInfo::GetDeclaration() const {
56 return m_declaration;
57 }
58
GetName() const59 ConstString FunctionInfo::GetName() const { return m_name; }
60
MemorySize() const61 size_t FunctionInfo::MemorySize() const {
62 return m_name.MemorySize() + m_declaration.MemorySize();
63 }
64
InlineFunctionInfo(const char * name,llvm::StringRef mangled,const Declaration * decl_ptr,const Declaration * call_decl_ptr)65 InlineFunctionInfo::InlineFunctionInfo(const char *name,
66 llvm::StringRef mangled,
67 const Declaration *decl_ptr,
68 const Declaration *call_decl_ptr)
69 : FunctionInfo(name, decl_ptr), m_mangled(mangled),
70 m_call_decl(call_decl_ptr) {}
71
InlineFunctionInfo(ConstString name,const Mangled & mangled,const Declaration * decl_ptr,const Declaration * call_decl_ptr)72 InlineFunctionInfo::InlineFunctionInfo(ConstString name,
73 const Mangled &mangled,
74 const Declaration *decl_ptr,
75 const Declaration *call_decl_ptr)
76 : FunctionInfo(name, decl_ptr), m_mangled(mangled),
77 m_call_decl(call_decl_ptr) {}
78
79 InlineFunctionInfo::~InlineFunctionInfo() = default;
80
Dump(Stream * s,bool show_fullpaths) const81 void InlineFunctionInfo::Dump(Stream *s, bool show_fullpaths) const {
82 FunctionInfo::Dump(s, show_fullpaths);
83 if (m_mangled)
84 m_mangled.Dump(s);
85 }
86
DumpStopContext(Stream * s) const87 void InlineFunctionInfo::DumpStopContext(Stream *s) const {
88 // s->Indent("[inlined] ");
89 s->Indent();
90 if (m_mangled)
91 s->PutCString(m_mangled.GetName().AsCString());
92 else
93 s->PutCString(m_name.AsCString());
94 }
95
GetName() const96 ConstString InlineFunctionInfo::GetName() const {
97 if (m_mangled)
98 return m_mangled.GetName();
99 return m_name;
100 }
101
GetDisplayName() const102 ConstString InlineFunctionInfo::GetDisplayName() const {
103 if (m_mangled)
104 return m_mangled.GetDisplayDemangledName();
105 return m_name;
106 }
107
GetCallSite()108 Declaration &InlineFunctionInfo::GetCallSite() { return m_call_decl; }
109
GetCallSite() const110 const Declaration &InlineFunctionInfo::GetCallSite() const {
111 return m_call_decl;
112 }
113
GetMangled()114 Mangled &InlineFunctionInfo::GetMangled() { return m_mangled; }
115
GetMangled() const116 const Mangled &InlineFunctionInfo::GetMangled() const { return m_mangled; }
117
MemorySize() const118 size_t InlineFunctionInfo::MemorySize() const {
119 return FunctionInfo::MemorySize() + m_mangled.MemorySize();
120 }
121
122 /// @name Call site related structures
123 /// @{
124
GetLoadAddress(lldb::addr_t unresolved_pc,Function & caller,Target & target)125 lldb::addr_t CallEdge::GetLoadAddress(lldb::addr_t unresolved_pc,
126 Function &caller, Target &target) {
127 Log *log = GetLog(LLDBLog::Step);
128
129 const Address &caller_start_addr = caller.GetAddressRange().GetBaseAddress();
130
131 ModuleSP caller_module_sp = caller_start_addr.GetModule();
132 if (!caller_module_sp) {
133 LLDB_LOG(log, "GetLoadAddress: cannot get Module for caller");
134 return LLDB_INVALID_ADDRESS;
135 }
136
137 SectionList *section_list = caller_module_sp->GetSectionList();
138 if (!section_list) {
139 LLDB_LOG(log, "GetLoadAddress: cannot get SectionList for Module");
140 return LLDB_INVALID_ADDRESS;
141 }
142
143 Address the_addr = Address(unresolved_pc, section_list);
144 lldb::addr_t load_addr = the_addr.GetLoadAddress(&target);
145 return load_addr;
146 }
147
GetReturnPCAddress(Function & caller,Target & target) const148 lldb::addr_t CallEdge::GetReturnPCAddress(Function &caller,
149 Target &target) const {
150 return GetLoadAddress(GetUnresolvedReturnPCAddress(), caller, target);
151 }
152
ParseSymbolFileAndResolve(ModuleList & images)153 void DirectCallEdge::ParseSymbolFileAndResolve(ModuleList &images) {
154 if (resolved)
155 return;
156
157 Log *log = GetLog(LLDBLog::Step);
158 LLDB_LOG(log, "DirectCallEdge: Lazily parsing the call graph for {0}",
159 lazy_callee.symbol_name);
160
161 auto resolve_lazy_callee = [&]() -> Function * {
162 ConstString callee_name{lazy_callee.symbol_name};
163 SymbolContextList sc_list;
164 images.FindFunctionSymbols(callee_name, eFunctionNameTypeAuto, sc_list);
165 size_t num_matches = sc_list.GetSize();
166 if (num_matches == 0 || !sc_list[0].symbol) {
167 LLDB_LOG(log,
168 "DirectCallEdge: Found no symbols for {0}, cannot resolve it",
169 callee_name);
170 return nullptr;
171 }
172 Address callee_addr = sc_list[0].symbol->GetAddress();
173 if (!callee_addr.IsValid()) {
174 LLDB_LOG(log, "DirectCallEdge: Invalid symbol address");
175 return nullptr;
176 }
177 Function *f = callee_addr.CalculateSymbolContextFunction();
178 if (!f) {
179 LLDB_LOG(log, "DirectCallEdge: Could not find complete function");
180 return nullptr;
181 }
182 return f;
183 };
184 lazy_callee.def = resolve_lazy_callee();
185 resolved = true;
186 }
187
GetCallee(ModuleList & images,ExecutionContext &)188 Function *DirectCallEdge::GetCallee(ModuleList &images, ExecutionContext &) {
189 ParseSymbolFileAndResolve(images);
190 assert(resolved && "Did not resolve lazy callee");
191 return lazy_callee.def;
192 }
193
GetCallee(ModuleList & images,ExecutionContext & exe_ctx)194 Function *IndirectCallEdge::GetCallee(ModuleList &images,
195 ExecutionContext &exe_ctx) {
196 Log *log = GetLog(LLDBLog::Step);
197 Status error;
198 Value callee_addr_val;
199 if (!call_target.Evaluate(
200 &exe_ctx, exe_ctx.GetRegisterContext(), LLDB_INVALID_ADDRESS,
201 /*initial_value_ptr=*/nullptr,
202 /*object_address_ptr=*/nullptr, callee_addr_val, &error)) {
203 LLDB_LOGF(log, "IndirectCallEdge: Could not evaluate expression: %s",
204 error.AsCString());
205 return nullptr;
206 }
207
208 addr_t raw_addr = callee_addr_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS);
209 if (raw_addr == LLDB_INVALID_ADDRESS) {
210 LLDB_LOG(log, "IndirectCallEdge: Could not extract address from scalar");
211 return nullptr;
212 }
213
214 Address callee_addr;
215 if (!exe_ctx.GetTargetPtr()->ResolveLoadAddress(raw_addr, callee_addr)) {
216 LLDB_LOG(log, "IndirectCallEdge: Could not resolve callee's load address");
217 return nullptr;
218 }
219
220 Function *f = callee_addr.CalculateSymbolContextFunction();
221 if (!f) {
222 LLDB_LOG(log, "IndirectCallEdge: Could not find complete function");
223 return nullptr;
224 }
225
226 return f;
227 }
228
229 /// @}
230
231 //
Function(CompileUnit * comp_unit,lldb::user_id_t func_uid,lldb::user_id_t type_uid,const Mangled & mangled,Type * type,const AddressRange & range)232 Function::Function(CompileUnit *comp_unit, lldb::user_id_t func_uid,
233 lldb::user_id_t type_uid, const Mangled &mangled, Type *type,
234 const AddressRange &range)
235 : UserID(func_uid), m_comp_unit(comp_unit), m_type_uid(type_uid),
236 m_type(type), m_mangled(mangled), m_block(func_uid), m_range(range),
237 m_frame_base(), m_flags(), m_prologue_byte_size(0) {
238 m_block.SetParentScope(this);
239 assert(comp_unit != nullptr);
240 }
241
242 Function::~Function() = default;
243
GetStartLineSourceInfo(FileSpec & source_file,uint32_t & line_no)244 void Function::GetStartLineSourceInfo(FileSpec &source_file,
245 uint32_t &line_no) {
246 line_no = 0;
247 source_file.Clear();
248
249 if (m_comp_unit == nullptr)
250 return;
251
252 // Initialize m_type if it hasn't been initialized already
253 GetType();
254
255 if (m_type != nullptr && m_type->GetDeclaration().GetLine() != 0) {
256 source_file = m_type->GetDeclaration().GetFile();
257 line_no = m_type->GetDeclaration().GetLine();
258 } else {
259 LineTable *line_table = m_comp_unit->GetLineTable();
260 if (line_table == nullptr)
261 return;
262
263 LineEntry line_entry;
264 if (line_table->FindLineEntryByAddress(GetAddressRange().GetBaseAddress(),
265 line_entry, nullptr)) {
266 line_no = line_entry.line;
267 source_file = line_entry.file;
268 }
269 }
270 }
271
GetEndLineSourceInfo(FileSpec & source_file,uint32_t & line_no)272 void Function::GetEndLineSourceInfo(FileSpec &source_file, uint32_t &line_no) {
273 line_no = 0;
274 source_file.Clear();
275
276 // The -1 is kind of cheesy, but I want to get the last line entry for the
277 // given function, not the first entry of the next.
278 Address scratch_addr(GetAddressRange().GetBaseAddress());
279 scratch_addr.SetOffset(scratch_addr.GetOffset() +
280 GetAddressRange().GetByteSize() - 1);
281
282 LineTable *line_table = m_comp_unit->GetLineTable();
283 if (line_table == nullptr)
284 return;
285
286 LineEntry line_entry;
287 if (line_table->FindLineEntryByAddress(scratch_addr, line_entry, nullptr)) {
288 line_no = line_entry.line;
289 source_file = line_entry.file;
290 }
291 }
292
GetCallEdges()293 llvm::ArrayRef<std::unique_ptr<CallEdge>> Function::GetCallEdges() {
294 std::lock_guard<std::mutex> guard(m_call_edges_lock);
295
296 if (m_call_edges_resolved)
297 return m_call_edges;
298
299 Log *log = GetLog(LLDBLog::Step);
300 LLDB_LOG(log, "GetCallEdges: Attempting to parse call site info for {0}",
301 GetDisplayName());
302
303 m_call_edges_resolved = true;
304
305 // Find the SymbolFile which provided this function's definition.
306 Block &block = GetBlock(/*can_create*/true);
307 SymbolFile *sym_file = block.GetSymbolFile();
308 if (!sym_file)
309 return std::nullopt;
310
311 // Lazily read call site information from the SymbolFile.
312 m_call_edges = sym_file->ParseCallEdgesInFunction(GetID());
313
314 // Sort the call edges to speed up return_pc lookups.
315 llvm::sort(m_call_edges, [](const std::unique_ptr<CallEdge> &LHS,
316 const std::unique_ptr<CallEdge> &RHS) {
317 return LHS->GetSortKey() < RHS->GetSortKey();
318 });
319
320 return m_call_edges;
321 }
322
GetTailCallingEdges()323 llvm::ArrayRef<std::unique_ptr<CallEdge>> Function::GetTailCallingEdges() {
324 // Tail calling edges are sorted at the end of the list. Find them by dropping
325 // all non-tail-calls.
326 return GetCallEdges().drop_until(
327 [](const std::unique_ptr<CallEdge> &edge) { return edge->IsTailCall(); });
328 }
329
GetCallEdgeForReturnAddress(addr_t return_pc,Target & target)330 CallEdge *Function::GetCallEdgeForReturnAddress(addr_t return_pc,
331 Target &target) {
332 auto edges = GetCallEdges();
333 auto edge_it =
334 llvm::partition_point(edges, [&](const std::unique_ptr<CallEdge> &edge) {
335 return std::make_pair(edge->IsTailCall(),
336 edge->GetReturnPCAddress(*this, target)) <
337 std::make_pair(false, return_pc);
338 });
339 if (edge_it == edges.end() ||
340 edge_it->get()->GetReturnPCAddress(*this, target) != return_pc)
341 return nullptr;
342 return edge_it->get();
343 }
344
GetBlock(bool can_create)345 Block &Function::GetBlock(bool can_create) {
346 if (!m_block.BlockInfoHasBeenParsed() && can_create) {
347 ModuleSP module_sp = CalculateSymbolContextModule();
348 if (module_sp) {
349 module_sp->GetSymbolFile()->ParseBlocksRecursive(*this);
350 } else {
351 Debugger::ReportError(llvm::formatv(
352 "unable to find module shared pointer for function '{0}' in {1}",
353 GetName().GetCString(), m_comp_unit->GetPrimaryFile().GetPath()));
354 }
355 m_block.SetBlockInfoHasBeenParsed(true, true);
356 }
357 return m_block;
358 }
359
GetCompileUnit()360 CompileUnit *Function::GetCompileUnit() { return m_comp_unit; }
361
GetCompileUnit() const362 const CompileUnit *Function::GetCompileUnit() const { return m_comp_unit; }
363
GetDescription(Stream * s,lldb::DescriptionLevel level,Target * target)364 void Function::GetDescription(Stream *s, lldb::DescriptionLevel level,
365 Target *target) {
366 ConstString name = GetName();
367 ConstString mangled = m_mangled.GetMangledName();
368
369 *s << "id = " << (const UserID &)*this;
370 if (name)
371 s->AsRawOstream() << ", name = \"" << name << '"';
372 if (mangled)
373 s->AsRawOstream() << ", mangled = \"" << mangled << '"';
374 *s << ", range = ";
375 Address::DumpStyle fallback_style;
376 if (level == eDescriptionLevelVerbose)
377 fallback_style = Address::DumpStyleModuleWithFileAddress;
378 else
379 fallback_style = Address::DumpStyleFileAddress;
380 GetAddressRange().Dump(s, target, Address::DumpStyleLoadAddress,
381 fallback_style);
382 }
383
Dump(Stream * s,bool show_context) const384 void Function::Dump(Stream *s, bool show_context) const {
385 s->Printf("%p: ", static_cast<const void *>(this));
386 s->Indent();
387 *s << "Function" << static_cast<const UserID &>(*this);
388
389 m_mangled.Dump(s);
390
391 if (m_type)
392 s->Printf(", type = %p", static_cast<void *>(m_type));
393 else if (m_type_uid != LLDB_INVALID_UID)
394 s->Printf(", type_uid = 0x%8.8" PRIx64, m_type_uid);
395
396 s->EOL();
397 // Dump the root object
398 if (m_block.BlockInfoHasBeenParsed())
399 m_block.Dump(s, m_range.GetBaseAddress().GetFileAddress(), INT_MAX,
400 show_context);
401 }
402
CalculateSymbolContext(SymbolContext * sc)403 void Function::CalculateSymbolContext(SymbolContext *sc) {
404 sc->function = this;
405 m_comp_unit->CalculateSymbolContext(sc);
406 }
407
CalculateSymbolContextModule()408 ModuleSP Function::CalculateSymbolContextModule() {
409 SectionSP section_sp(m_range.GetBaseAddress().GetSection());
410 if (section_sp)
411 return section_sp->GetModule();
412
413 return this->GetCompileUnit()->GetModule();
414 }
415
CalculateSymbolContextCompileUnit()416 CompileUnit *Function::CalculateSymbolContextCompileUnit() {
417 return this->GetCompileUnit();
418 }
419
CalculateSymbolContextFunction()420 Function *Function::CalculateSymbolContextFunction() { return this; }
421
GetInstructions(const ExecutionContext & exe_ctx,const char * flavor,bool prefer_file_cache)422 lldb::DisassemblerSP Function::GetInstructions(const ExecutionContext &exe_ctx,
423 const char *flavor,
424 bool prefer_file_cache) {
425 ModuleSP module_sp(GetAddressRange().GetBaseAddress().GetModule());
426 if (module_sp && exe_ctx.HasTargetScope()) {
427 return Disassembler::DisassembleRange(module_sp->GetArchitecture(), nullptr,
428 flavor, exe_ctx.GetTargetRef(),
429 GetAddressRange(), !prefer_file_cache);
430 }
431 return lldb::DisassemblerSP();
432 }
433
GetDisassembly(const ExecutionContext & exe_ctx,const char * flavor,Stream & strm,bool prefer_file_cache)434 bool Function::GetDisassembly(const ExecutionContext &exe_ctx,
435 const char *flavor, Stream &strm,
436 bool prefer_file_cache) {
437 lldb::DisassemblerSP disassembler_sp =
438 GetInstructions(exe_ctx, flavor, prefer_file_cache);
439 if (disassembler_sp) {
440 const bool show_address = true;
441 const bool show_bytes = false;
442 const bool show_control_flow_kind = false;
443 disassembler_sp->GetInstructionList().Dump(
444 &strm, show_address, show_bytes, show_control_flow_kind, &exe_ctx);
445 return true;
446 }
447 return false;
448 }
449
450 // Symbol *
451 // Function::CalculateSymbolContextSymbol ()
452 //{
453 // return // TODO: find the symbol for the function???
454 //}
455
DumpSymbolContext(Stream * s)456 void Function::DumpSymbolContext(Stream *s) {
457 m_comp_unit->DumpSymbolContext(s);
458 s->Printf(", Function{0x%8.8" PRIx64 "}", GetID());
459 }
460
MemorySize() const461 size_t Function::MemorySize() const {
462 size_t mem_size = sizeof(Function) + m_block.MemorySize();
463 return mem_size;
464 }
465
GetIsOptimized()466 bool Function::GetIsOptimized() {
467 bool result = false;
468
469 // Currently optimization is only indicted by the vendor extension
470 // DW_AT_APPLE_optimized which is set on a compile unit level.
471 if (m_comp_unit) {
472 result = m_comp_unit->GetIsOptimized();
473 }
474 return result;
475 }
476
IsTopLevelFunction()477 bool Function::IsTopLevelFunction() {
478 bool result = false;
479
480 if (Language *language = Language::FindPlugin(GetLanguage()))
481 result = language->IsTopLevelFunction(*this);
482
483 return result;
484 }
485
GetDisplayName() const486 ConstString Function::GetDisplayName() const {
487 return m_mangled.GetDisplayDemangledName();
488 }
489
GetDeclContext()490 CompilerDeclContext Function::GetDeclContext() {
491 ModuleSP module_sp = CalculateSymbolContextModule();
492
493 if (module_sp) {
494 if (SymbolFile *sym_file = module_sp->GetSymbolFile())
495 return sym_file->GetDeclContextForUID(GetID());
496 }
497 return CompilerDeclContext();
498 }
499
GetType()500 Type *Function::GetType() {
501 if (m_type == nullptr) {
502 SymbolContext sc;
503
504 CalculateSymbolContext(&sc);
505
506 if (!sc.module_sp)
507 return nullptr;
508
509 SymbolFile *sym_file = sc.module_sp->GetSymbolFile();
510
511 if (sym_file == nullptr)
512 return nullptr;
513
514 m_type = sym_file->ResolveTypeUID(m_type_uid);
515 }
516 return m_type;
517 }
518
GetType() const519 const Type *Function::GetType() const { return m_type; }
520
GetCompilerType()521 CompilerType Function::GetCompilerType() {
522 Type *function_type = GetType();
523 if (function_type)
524 return function_type->GetFullCompilerType();
525 return CompilerType();
526 }
527
GetPrologueByteSize()528 uint32_t Function::GetPrologueByteSize() {
529 if (m_prologue_byte_size == 0 &&
530 m_flags.IsClear(flagsCalculatedPrologueSize)) {
531 m_flags.Set(flagsCalculatedPrologueSize);
532 LineTable *line_table = m_comp_unit->GetLineTable();
533 uint32_t prologue_end_line_idx = 0;
534
535 if (line_table) {
536 LineEntry first_line_entry;
537 uint32_t first_line_entry_idx = UINT32_MAX;
538 if (line_table->FindLineEntryByAddress(GetAddressRange().GetBaseAddress(),
539 first_line_entry,
540 &first_line_entry_idx)) {
541 // Make sure the first line entry isn't already the end of the prologue
542 addr_t prologue_end_file_addr = LLDB_INVALID_ADDRESS;
543 addr_t line_zero_end_file_addr = LLDB_INVALID_ADDRESS;
544
545 if (first_line_entry.is_prologue_end) {
546 prologue_end_file_addr =
547 first_line_entry.range.GetBaseAddress().GetFileAddress();
548 prologue_end_line_idx = first_line_entry_idx;
549 } else {
550 // Check the first few instructions and look for one that has
551 // is_prologue_end set to true.
552 const uint32_t last_line_entry_idx = first_line_entry_idx + 6;
553 for (uint32_t idx = first_line_entry_idx + 1;
554 idx < last_line_entry_idx; ++idx) {
555 LineEntry line_entry;
556 if (line_table->GetLineEntryAtIndex(idx, line_entry)) {
557 if (line_entry.is_prologue_end) {
558 prologue_end_file_addr =
559 line_entry.range.GetBaseAddress().GetFileAddress();
560 prologue_end_line_idx = idx;
561 break;
562 }
563 }
564 }
565 }
566
567 // If we didn't find the end of the prologue in the line tables, then
568 // just use the end address of the first line table entry
569 if (prologue_end_file_addr == LLDB_INVALID_ADDRESS) {
570 // Check the first few instructions and look for one that has a line
571 // number that's different than the first entry.
572 uint32_t last_line_entry_idx = first_line_entry_idx + 6;
573 for (uint32_t idx = first_line_entry_idx + 1;
574 idx < last_line_entry_idx; ++idx) {
575 LineEntry line_entry;
576 if (line_table->GetLineEntryAtIndex(idx, line_entry)) {
577 if (line_entry.line != first_line_entry.line) {
578 prologue_end_file_addr =
579 line_entry.range.GetBaseAddress().GetFileAddress();
580 prologue_end_line_idx = idx;
581 break;
582 }
583 }
584 }
585
586 if (prologue_end_file_addr == LLDB_INVALID_ADDRESS) {
587 prologue_end_file_addr =
588 first_line_entry.range.GetBaseAddress().GetFileAddress() +
589 first_line_entry.range.GetByteSize();
590 prologue_end_line_idx = first_line_entry_idx;
591 }
592 }
593
594 const addr_t func_start_file_addr =
595 m_range.GetBaseAddress().GetFileAddress();
596 const addr_t func_end_file_addr =
597 func_start_file_addr + m_range.GetByteSize();
598
599 // Now calculate the offset to pass the subsequent line 0 entries.
600 uint32_t first_non_zero_line = prologue_end_line_idx;
601 while (true) {
602 LineEntry line_entry;
603 if (line_table->GetLineEntryAtIndex(first_non_zero_line,
604 line_entry)) {
605 if (line_entry.line != 0)
606 break;
607 }
608 if (line_entry.range.GetBaseAddress().GetFileAddress() >=
609 func_end_file_addr)
610 break;
611
612 first_non_zero_line++;
613 }
614
615 if (first_non_zero_line > prologue_end_line_idx) {
616 LineEntry first_non_zero_entry;
617 if (line_table->GetLineEntryAtIndex(first_non_zero_line,
618 first_non_zero_entry)) {
619 line_zero_end_file_addr =
620 first_non_zero_entry.range.GetBaseAddress().GetFileAddress();
621 }
622 }
623
624 // Verify that this prologue end file address in the function's address
625 // range just to be sure
626 if (func_start_file_addr < prologue_end_file_addr &&
627 prologue_end_file_addr < func_end_file_addr) {
628 m_prologue_byte_size = prologue_end_file_addr - func_start_file_addr;
629 }
630
631 if (prologue_end_file_addr < line_zero_end_file_addr &&
632 line_zero_end_file_addr < func_end_file_addr) {
633 m_prologue_byte_size +=
634 line_zero_end_file_addr - prologue_end_file_addr;
635 }
636 }
637 }
638 }
639
640 return m_prologue_byte_size;
641 }
642
GetLanguage() const643 lldb::LanguageType Function::GetLanguage() const {
644 lldb::LanguageType lang = m_mangled.GuessLanguage();
645 if (lang != lldb::eLanguageTypeUnknown)
646 return lang;
647
648 if (m_comp_unit)
649 return m_comp_unit->GetLanguage();
650
651 return lldb::eLanguageTypeUnknown;
652 }
653
GetName() const654 ConstString Function::GetName() const {
655 return m_mangled.GetName();
656 }
657
GetNameNoArguments() const658 ConstString Function::GetNameNoArguments() const {
659 return m_mangled.GetName(Mangled::ePreferDemangledWithoutArguments);
660 }
661