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 26using namespace lldb; 27using 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. 31FunctionInfo::FunctionInfo(const char *name, const Declaration *decl_ptr) 32 : m_name(name), m_declaration(decl_ptr) {} 33 34FunctionInfo::FunctionInfo(ConstString name, const Declaration *decl_ptr) 35 : m_name(name), m_declaration(decl_ptr) {} 36 37FunctionInfo::~FunctionInfo() = default; 38 39void 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 45int 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 53Declaration &FunctionInfo::GetDeclaration() { return m_declaration; } 54 55const Declaration &FunctionInfo::GetDeclaration() const { 56 return m_declaration; 57} 58 59ConstString FunctionInfo::GetName() const { return m_name; } 60 61size_t FunctionInfo::MemorySize() const { 62 return m_name.MemorySize() + m_declaration.MemorySize(); 63} 64 65InlineFunctionInfo::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 72InlineFunctionInfo::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 79InlineFunctionInfo::~InlineFunctionInfo() = default; 80 81void 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 87void 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 96ConstString InlineFunctionInfo::GetName() const { 97 if (m_mangled) 98 return m_mangled.GetName(); 99 return m_name; 100} 101 102ConstString InlineFunctionInfo::GetDisplayName() const { 103 if (m_mangled) 104 return m_mangled.GetDisplayDemangledName(); 105 return m_name; 106} 107 108Declaration &InlineFunctionInfo::GetCallSite() { return m_call_decl; } 109 110const Declaration &InlineFunctionInfo::GetCallSite() const { 111 return m_call_decl; 112} 113 114Mangled &InlineFunctionInfo::GetMangled() { return m_mangled; } 115 116const Mangled &InlineFunctionInfo::GetMangled() const { return m_mangled; } 117 118size_t InlineFunctionInfo::MemorySize() const { 119 return FunctionInfo::MemorySize() + m_mangled.MemorySize(); 120} 121 122/// @name Call site related structures 123/// @{ 124 125CallEdge::~CallEdge() = default; 126 127CallEdge::CallEdge(AddrType caller_address_type, lldb::addr_t caller_address, 128 bool is_tail_call, CallSiteParameterArray &¶meters) 129 : caller_address(caller_address), caller_address_type(caller_address_type), 130 is_tail_call(is_tail_call), parameters(std::move(parameters)) {} 131 132lldb::addr_t CallEdge::GetLoadAddress(lldb::addr_t unresolved_pc, 133 Function &caller, Target &target) { 134 Log *log = GetLog(LLDBLog::Step); 135 136 const Address &caller_start_addr = caller.GetAddressRange().GetBaseAddress(); 137 138 ModuleSP caller_module_sp = caller_start_addr.GetModule(); 139 if (!caller_module_sp) { 140 LLDB_LOG(log, "GetLoadAddress: cannot get Module for caller"); 141 return LLDB_INVALID_ADDRESS; 142 } 143 144 SectionList *section_list = caller_module_sp->GetSectionList(); 145 if (!section_list) { 146 LLDB_LOG(log, "GetLoadAddress: cannot get SectionList for Module"); 147 return LLDB_INVALID_ADDRESS; 148 } 149 150 Address the_addr = Address(unresolved_pc, section_list); 151 lldb::addr_t load_addr = the_addr.GetLoadAddress(&target); 152 return load_addr; 153} 154 155lldb::addr_t CallEdge::GetReturnPCAddress(Function &caller, 156 Target &target) const { 157 return GetLoadAddress(GetUnresolvedReturnPCAddress(), caller, target); 158} 159 160void DirectCallEdge::ParseSymbolFileAndResolve(ModuleList &images) { 161 if (resolved) 162 return; 163 164 Log *log = GetLog(LLDBLog::Step); 165 LLDB_LOG(log, "DirectCallEdge: Lazily parsing the call graph for {0}", 166 lazy_callee.symbol_name); 167 168 auto resolve_lazy_callee = [&]() -> Function * { 169 ConstString callee_name{lazy_callee.symbol_name}; 170 SymbolContextList sc_list; 171 images.FindFunctionSymbols(callee_name, eFunctionNameTypeAuto, sc_list); 172 size_t num_matches = sc_list.GetSize(); 173 if (num_matches == 0 || !sc_list[0].symbol) { 174 LLDB_LOG(log, 175 "DirectCallEdge: Found no symbols for {0}, cannot resolve it", 176 callee_name); 177 return nullptr; 178 } 179 Address callee_addr = sc_list[0].symbol->GetAddress(); 180 if (!callee_addr.IsValid()) { 181 LLDB_LOG(log, "DirectCallEdge: Invalid symbol address"); 182 return nullptr; 183 } 184 Function *f = callee_addr.CalculateSymbolContextFunction(); 185 if (!f) { 186 LLDB_LOG(log, "DirectCallEdge: Could not find complete function"); 187 return nullptr; 188 } 189 return f; 190 }; 191 lazy_callee.def = resolve_lazy_callee(); 192 resolved = true; 193} 194 195DirectCallEdge::DirectCallEdge(const char *symbol_name, 196 AddrType caller_address_type, 197 lldb::addr_t caller_address, bool is_tail_call, 198 CallSiteParameterArray &¶meters) 199 : CallEdge(caller_address_type, caller_address, is_tail_call, 200 std::move(parameters)) { 201 lazy_callee.symbol_name = symbol_name; 202} 203 204Function *DirectCallEdge::GetCallee(ModuleList &images, ExecutionContext &) { 205 ParseSymbolFileAndResolve(images); 206 assert(resolved && "Did not resolve lazy callee"); 207 return lazy_callee.def; 208} 209 210IndirectCallEdge::IndirectCallEdge(DWARFExpressionList call_target, 211 AddrType caller_address_type, 212 lldb::addr_t caller_address, 213 bool is_tail_call, 214 CallSiteParameterArray &¶meters) 215 : CallEdge(caller_address_type, caller_address, is_tail_call, 216 std::move(parameters)), 217 call_target(std::move(call_target)) {} 218 219Function *IndirectCallEdge::GetCallee(ModuleList &images, 220 ExecutionContext &exe_ctx) { 221 Log *log = GetLog(LLDBLog::Step); 222 Status error; 223 Value callee_addr_val; 224 if (!call_target.Evaluate( 225 &exe_ctx, exe_ctx.GetRegisterContext(), LLDB_INVALID_ADDRESS, 226 /*initial_value_ptr=*/nullptr, 227 /*object_address_ptr=*/nullptr, callee_addr_val, &error)) { 228 LLDB_LOGF(log, "IndirectCallEdge: Could not evaluate expression: %s", 229 error.AsCString()); 230 return nullptr; 231 } 232 233 addr_t raw_addr = callee_addr_val.GetScalar().ULongLong(LLDB_INVALID_ADDRESS); 234 if (raw_addr == LLDB_INVALID_ADDRESS) { 235 LLDB_LOG(log, "IndirectCallEdge: Could not extract address from scalar"); 236 return nullptr; 237 } 238 239 Address callee_addr; 240 if (!exe_ctx.GetTargetPtr()->ResolveLoadAddress(raw_addr, callee_addr)) { 241 LLDB_LOG(log, "IndirectCallEdge: Could not resolve callee's load address"); 242 return nullptr; 243 } 244 245 Function *f = callee_addr.CalculateSymbolContextFunction(); 246 if (!f) { 247 LLDB_LOG(log, "IndirectCallEdge: Could not find complete function"); 248 return nullptr; 249 } 250 251 return f; 252} 253 254/// @} 255 256// 257Function::Function(CompileUnit *comp_unit, lldb::user_id_t func_uid, 258 lldb::user_id_t type_uid, const Mangled &mangled, Type *type, 259 const AddressRange &range) 260 : UserID(func_uid), m_comp_unit(comp_unit), m_type_uid(type_uid), 261 m_type(type), m_mangled(mangled), m_block(func_uid), m_range(range), 262 m_frame_base(), m_flags(), m_prologue_byte_size(0) { 263 m_block.SetParentScope(this); 264 assert(comp_unit != nullptr); 265} 266 267Function::~Function() = default; 268 269void Function::GetStartLineSourceInfo(FileSpec &source_file, 270 uint32_t &line_no) { 271 line_no = 0; 272 source_file.Clear(); 273 274 if (m_comp_unit == nullptr) 275 return; 276 277 // Initialize m_type if it hasn't been initialized already 278 GetType(); 279 280 if (m_type != nullptr && m_type->GetDeclaration().GetLine() != 0) { 281 source_file = m_type->GetDeclaration().GetFile(); 282 line_no = m_type->GetDeclaration().GetLine(); 283 } else { 284 LineTable *line_table = m_comp_unit->GetLineTable(); 285 if (line_table == nullptr) 286 return; 287 288 LineEntry line_entry; 289 if (line_table->FindLineEntryByAddress(GetAddressRange().GetBaseAddress(), 290 line_entry, nullptr)) { 291 line_no = line_entry.line; 292 source_file = line_entry.file; 293 } 294 } 295} 296 297void Function::GetEndLineSourceInfo(FileSpec &source_file, uint32_t &line_no) { 298 line_no = 0; 299 source_file.Clear(); 300 301 // The -1 is kind of cheesy, but I want to get the last line entry for the 302 // given function, not the first entry of the next. 303 Address scratch_addr(GetAddressRange().GetBaseAddress()); 304 scratch_addr.SetOffset(scratch_addr.GetOffset() + 305 GetAddressRange().GetByteSize() - 1); 306 307 LineTable *line_table = m_comp_unit->GetLineTable(); 308 if (line_table == nullptr) 309 return; 310 311 LineEntry line_entry; 312 if (line_table->FindLineEntryByAddress(scratch_addr, line_entry, nullptr)) { 313 line_no = line_entry.line; 314 source_file = line_entry.file; 315 } 316} 317 318llvm::ArrayRef<std::unique_ptr<CallEdge>> Function::GetCallEdges() { 319 std::lock_guard<std::mutex> guard(m_call_edges_lock); 320 321 if (m_call_edges_resolved) 322 return m_call_edges; 323 324 Log *log = GetLog(LLDBLog::Step); 325 LLDB_LOG(log, "GetCallEdges: Attempting to parse call site info for {0}", 326 GetDisplayName()); 327 328 m_call_edges_resolved = true; 329 330 // Find the SymbolFile which provided this function's definition. 331 Block &block = GetBlock(/*can_create*/true); 332 SymbolFile *sym_file = block.GetSymbolFile(); 333 if (!sym_file) 334 return std::nullopt; 335 336 // Lazily read call site information from the SymbolFile. 337 m_call_edges = sym_file->ParseCallEdgesInFunction(GetID()); 338 339 // Sort the call edges to speed up return_pc lookups. 340 llvm::sort(m_call_edges, [](const std::unique_ptr<CallEdge> &LHS, 341 const std::unique_ptr<CallEdge> &RHS) { 342 return LHS->GetSortKey() < RHS->GetSortKey(); 343 }); 344 345 return m_call_edges; 346} 347 348llvm::ArrayRef<std::unique_ptr<CallEdge>> Function::GetTailCallingEdges() { 349 // Tail calling edges are sorted at the end of the list. Find them by dropping 350 // all non-tail-calls. 351 return GetCallEdges().drop_until( 352 [](const std::unique_ptr<CallEdge> &edge) { return edge->IsTailCall(); }); 353} 354 355CallEdge *Function::GetCallEdgeForReturnAddress(addr_t return_pc, 356 Target &target) { 357 auto edges = GetCallEdges(); 358 auto edge_it = 359 llvm::partition_point(edges, [&](const std::unique_ptr<CallEdge> &edge) { 360 return std::make_pair(edge->IsTailCall(), 361 edge->GetReturnPCAddress(*this, target)) < 362 std::make_pair(false, return_pc); 363 }); 364 if (edge_it == edges.end() || 365 edge_it->get()->GetReturnPCAddress(*this, target) != return_pc) 366 return nullptr; 367 return edge_it->get(); 368} 369 370Block &Function::GetBlock(bool can_create) { 371 if (!m_block.BlockInfoHasBeenParsed() && can_create) { 372 ModuleSP module_sp = CalculateSymbolContextModule(); 373 if (module_sp) { 374 module_sp->GetSymbolFile()->ParseBlocksRecursive(*this); 375 } else { 376 Debugger::ReportError(llvm::formatv( 377 "unable to find module shared pointer for function '{0}' in {1}", 378 GetName().GetCString(), m_comp_unit->GetPrimaryFile().GetPath())); 379 } 380 m_block.SetBlockInfoHasBeenParsed(true, true); 381 } 382 return m_block; 383} 384 385CompileUnit *Function::GetCompileUnit() { return m_comp_unit; } 386 387const CompileUnit *Function::GetCompileUnit() const { return m_comp_unit; } 388 389void Function::GetDescription(Stream *s, lldb::DescriptionLevel level, 390 Target *target) { 391 ConstString name = GetName(); 392 ConstString mangled = m_mangled.GetMangledName(); 393 394 *s << "id = " << (const UserID &)*this; 395 if (name) 396 s->AsRawOstream() << ", name = \"" << name << '"'; 397 if (mangled) 398 s->AsRawOstream() << ", mangled = \"" << mangled << '"'; 399 if (level == eDescriptionLevelVerbose) { 400 *s << ", decl_context = {"; 401 auto decl_context = GetCompilerContext(); 402 // Drop the function itself from the context chain. 403 if (decl_context.size()) 404 decl_context.pop_back(); 405 llvm::interleaveComma(decl_context, *s, [&](auto &ctx) { ctx.Dump(*s); }); 406 *s << "}"; 407 } 408 *s << ", range = "; 409 Address::DumpStyle fallback_style; 410 if (level == eDescriptionLevelVerbose) 411 fallback_style = Address::DumpStyleModuleWithFileAddress; 412 else 413 fallback_style = Address::DumpStyleFileAddress; 414 GetAddressRange().Dump(s, target, Address::DumpStyleLoadAddress, 415 fallback_style); 416} 417 418void Function::Dump(Stream *s, bool show_context) const { 419 s->Printf("%p: ", static_cast<const void *>(this)); 420 s->Indent(); 421 *s << "Function" << static_cast<const UserID &>(*this); 422 423 m_mangled.Dump(s); 424 425 if (m_type) 426 s->Printf(", type = %p", static_cast<void *>(m_type)); 427 else if (m_type_uid != LLDB_INVALID_UID) 428 s->Printf(", type_uid = 0x%8.8" PRIx64, m_type_uid); 429 430 s->EOL(); 431 // Dump the root object 432 if (m_block.BlockInfoHasBeenParsed()) 433 m_block.Dump(s, m_range.GetBaseAddress().GetFileAddress(), INT_MAX, 434 show_context); 435} 436 437void Function::CalculateSymbolContext(SymbolContext *sc) { 438 sc->function = this; 439 m_comp_unit->CalculateSymbolContext(sc); 440} 441 442ModuleSP Function::CalculateSymbolContextModule() { 443 SectionSP section_sp(m_range.GetBaseAddress().GetSection()); 444 if (section_sp) 445 return section_sp->GetModule(); 446 447 return this->GetCompileUnit()->GetModule(); 448} 449 450CompileUnit *Function::CalculateSymbolContextCompileUnit() { 451 return this->GetCompileUnit(); 452} 453 454Function *Function::CalculateSymbolContextFunction() { return this; } 455 456lldb::DisassemblerSP Function::GetInstructions(const ExecutionContext &exe_ctx, 457 const char *flavor, 458 bool prefer_file_cache) { 459 ModuleSP module_sp(GetAddressRange().GetBaseAddress().GetModule()); 460 if (module_sp && exe_ctx.HasTargetScope()) { 461 return Disassembler::DisassembleRange(module_sp->GetArchitecture(), nullptr, 462 flavor, exe_ctx.GetTargetRef(), 463 GetAddressRange(), !prefer_file_cache); 464 } 465 return lldb::DisassemblerSP(); 466} 467 468bool Function::GetDisassembly(const ExecutionContext &exe_ctx, 469 const char *flavor, Stream &strm, 470 bool prefer_file_cache) { 471 lldb::DisassemblerSP disassembler_sp = 472 GetInstructions(exe_ctx, flavor, prefer_file_cache); 473 if (disassembler_sp) { 474 const bool show_address = true; 475 const bool show_bytes = false; 476 const bool show_control_flow_kind = false; 477 disassembler_sp->GetInstructionList().Dump( 478 &strm, show_address, show_bytes, show_control_flow_kind, &exe_ctx); 479 return true; 480 } 481 return false; 482} 483 484// Symbol * 485// Function::CalculateSymbolContextSymbol () 486//{ 487// return // TODO: find the symbol for the function??? 488//} 489 490void Function::DumpSymbolContext(Stream *s) { 491 m_comp_unit->DumpSymbolContext(s); 492 s->Printf(", Function{0x%8.8" PRIx64 "}", GetID()); 493} 494 495size_t Function::MemorySize() const { 496 size_t mem_size = sizeof(Function) + m_block.MemorySize(); 497 return mem_size; 498} 499 500bool Function::GetIsOptimized() { 501 bool result = false; 502 503 // Currently optimization is only indicted by the vendor extension 504 // DW_AT_APPLE_optimized which is set on a compile unit level. 505 if (m_comp_unit) { 506 result = m_comp_unit->GetIsOptimized(); 507 } 508 return result; 509} 510 511bool Function::IsTopLevelFunction() { 512 bool result = false; 513 514 if (Language *language = Language::FindPlugin(GetLanguage())) 515 result = language->IsTopLevelFunction(*this); 516 517 return result; 518} 519 520ConstString Function::GetDisplayName() const { 521 return m_mangled.GetDisplayDemangledName(); 522} 523 524CompilerDeclContext Function::GetDeclContext() { 525 if (ModuleSP module_sp = CalculateSymbolContextModule()) 526 if (SymbolFile *sym_file = module_sp->GetSymbolFile()) 527 return sym_file->GetDeclContextForUID(GetID()); 528 return {}; 529} 530 531std::vector<CompilerContext> Function::GetCompilerContext() { 532 if (ModuleSP module_sp = CalculateSymbolContextModule()) 533 if (SymbolFile *sym_file = module_sp->GetSymbolFile()) 534 return sym_file->GetCompilerContextForUID(GetID()); 535 return {}; 536} 537 538Type *Function::GetType() { 539 if (m_type == nullptr) { 540 SymbolContext sc; 541 542 CalculateSymbolContext(&sc); 543 544 if (!sc.module_sp) 545 return nullptr; 546 547 SymbolFile *sym_file = sc.module_sp->GetSymbolFile(); 548 549 if (sym_file == nullptr) 550 return nullptr; 551 552 m_type = sym_file->ResolveTypeUID(m_type_uid); 553 } 554 return m_type; 555} 556 557const Type *Function::GetType() const { return m_type; } 558 559CompilerType Function::GetCompilerType() { 560 Type *function_type = GetType(); 561 if (function_type) 562 return function_type->GetFullCompilerType(); 563 return CompilerType(); 564} 565 566uint32_t Function::GetPrologueByteSize() { 567 if (m_prologue_byte_size == 0 && 568 m_flags.IsClear(flagsCalculatedPrologueSize)) { 569 m_flags.Set(flagsCalculatedPrologueSize); 570 LineTable *line_table = m_comp_unit->GetLineTable(); 571 uint32_t prologue_end_line_idx = 0; 572 573 if (line_table) { 574 LineEntry first_line_entry; 575 uint32_t first_line_entry_idx = UINT32_MAX; 576 if (line_table->FindLineEntryByAddress(GetAddressRange().GetBaseAddress(), 577 first_line_entry, 578 &first_line_entry_idx)) { 579 // Make sure the first line entry isn't already the end of the prologue 580 addr_t prologue_end_file_addr = LLDB_INVALID_ADDRESS; 581 addr_t line_zero_end_file_addr = LLDB_INVALID_ADDRESS; 582 583 if (first_line_entry.is_prologue_end) { 584 prologue_end_file_addr = 585 first_line_entry.range.GetBaseAddress().GetFileAddress(); 586 prologue_end_line_idx = first_line_entry_idx; 587 } else { 588 // Check the first few instructions and look for one that has 589 // is_prologue_end set to true. 590 const uint32_t last_line_entry_idx = first_line_entry_idx + 6; 591 for (uint32_t idx = first_line_entry_idx + 1; 592 idx < last_line_entry_idx; ++idx) { 593 LineEntry line_entry; 594 if (line_table->GetLineEntryAtIndex(idx, line_entry)) { 595 if (line_entry.is_prologue_end) { 596 prologue_end_file_addr = 597 line_entry.range.GetBaseAddress().GetFileAddress(); 598 prologue_end_line_idx = idx; 599 break; 600 } 601 } 602 } 603 } 604 605 // If we didn't find the end of the prologue in the line tables, then 606 // just use the end address of the first line table entry 607 if (prologue_end_file_addr == LLDB_INVALID_ADDRESS) { 608 // Check the first few instructions and look for one that has a line 609 // number that's different than the first entry. 610 uint32_t last_line_entry_idx = first_line_entry_idx + 6; 611 for (uint32_t idx = first_line_entry_idx + 1; 612 idx < last_line_entry_idx; ++idx) { 613 LineEntry line_entry; 614 if (line_table->GetLineEntryAtIndex(idx, line_entry)) { 615 if (line_entry.line != first_line_entry.line) { 616 prologue_end_file_addr = 617 line_entry.range.GetBaseAddress().GetFileAddress(); 618 prologue_end_line_idx = idx; 619 break; 620 } 621 } 622 } 623 624 if (prologue_end_file_addr == LLDB_INVALID_ADDRESS) { 625 prologue_end_file_addr = 626 first_line_entry.range.GetBaseAddress().GetFileAddress() + 627 first_line_entry.range.GetByteSize(); 628 prologue_end_line_idx = first_line_entry_idx; 629 } 630 } 631 632 const addr_t func_start_file_addr = 633 m_range.GetBaseAddress().GetFileAddress(); 634 const addr_t func_end_file_addr = 635 func_start_file_addr + m_range.GetByteSize(); 636 637 // Now calculate the offset to pass the subsequent line 0 entries. 638 uint32_t first_non_zero_line = prologue_end_line_idx; 639 while (true) { 640 LineEntry line_entry; 641 if (line_table->GetLineEntryAtIndex(first_non_zero_line, 642 line_entry)) { 643 if (line_entry.line != 0) 644 break; 645 } 646 if (line_entry.range.GetBaseAddress().GetFileAddress() >= 647 func_end_file_addr) 648 break; 649 650 first_non_zero_line++; 651 } 652 653 if (first_non_zero_line > prologue_end_line_idx) { 654 LineEntry first_non_zero_entry; 655 if (line_table->GetLineEntryAtIndex(first_non_zero_line, 656 first_non_zero_entry)) { 657 line_zero_end_file_addr = 658 first_non_zero_entry.range.GetBaseAddress().GetFileAddress(); 659 } 660 } 661 662 // Verify that this prologue end file address in the function's address 663 // range just to be sure 664 if (func_start_file_addr < prologue_end_file_addr && 665 prologue_end_file_addr < func_end_file_addr) { 666 m_prologue_byte_size = prologue_end_file_addr - func_start_file_addr; 667 } 668 669 if (prologue_end_file_addr < line_zero_end_file_addr && 670 line_zero_end_file_addr < func_end_file_addr) { 671 m_prologue_byte_size += 672 line_zero_end_file_addr - prologue_end_file_addr; 673 } 674 } 675 } 676 } 677 678 return m_prologue_byte_size; 679} 680 681lldb::LanguageType Function::GetLanguage() const { 682 lldb::LanguageType lang = m_mangled.GuessLanguage(); 683 if (lang != lldb::eLanguageTypeUnknown) 684 return lang; 685 686 if (m_comp_unit) 687 return m_comp_unit->GetLanguage(); 688 689 return lldb::eLanguageTypeUnknown; 690} 691 692ConstString Function::GetName() const { 693 return m_mangled.GetName(); 694} 695 696ConstString Function::GetNameNoArguments() const { 697 return m_mangled.GetName(Mangled::ePreferDemangledWithoutArguments); 698} 699