C++ DIInliningInfo类代码示例

DIInliningInfo
DWARFContext::getInliningInfoForAddress(uint64_t Address,
                                        DILineInfoSpecifier Spec) {
  DIInliningInfo InliningInfo;

  DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
  if (!CU)
    return InliningInfo;

  const DWARFLineTable *LineTable = nullptr;
  SmallVector<DWARFDie, 4> InlinedChain;
  CU->getInlinedChainForAddress(Address, InlinedChain);
  if (InlinedChain.size() == 0) {
    // If there is no DIE for address (e.g. it is in unavailable .dwo file),
    // try to at least get file/line info from symbol table.
    if (Spec.FLIKind != FileLineInfoKind::None) {
      DILineInfo Frame;
      LineTable = getLineTableForUnit(CU);
      if (LineTable &&
          LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
                                               Spec.FLIKind, Frame))
        InliningInfo.addFrame(Frame);
    }
    return InliningInfo;
  }

  uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
  for (uint32_t i = 0, n = InlinedChain.size(); i != n; i++) {
    DWARFDie &FunctionDIE = InlinedChain[i];
    DILineInfo Frame;
    // Get function name if necessary.
    if (const char *Name = FunctionDIE.getSubroutineName(Spec.FNKind))
      Frame.FunctionName = Name;
    if (Spec.FLIKind != FileLineInfoKind::None) {
      if (i == 0) {
        // For the topmost frame, initialize the line table of this
        // compile unit and fetch file/line info from it.
        LineTable = getLineTableForUnit(CU);
        // For the topmost routine, get file/line info from line table.
        if (LineTable)
          LineTable->getFileLineInfoForAddress(Address, CU->getCompilationDir(),
                                               Spec.FLIKind, Frame);
      } else {
        // Otherwise, use call file, call line and call column from
        // previous DIE in inlined chain.
        if (LineTable)
          LineTable->getFileNameByIndex(CallFile, CU->getCompilationDir(),
                                        Spec.FLIKind, Frame.FileName);
        Frame.Line = CallLine;
        Frame.Column = CallColumn;
      }
      // Get call file/line/column of a current DIE.
      if (i + 1 < n) {
        FunctionDIE.getCallerFrame(CallFile, CallLine, CallColumn);
      }
    }
    InliningInfo.addFrame(Frame);
  }
  return InliningInfo;
}

DIInliningInfo
PDBContext::getInliningInfoForAddress(uint64_t Address,
                                      DILineInfoSpecifier Specifier) {
  DIInliningInfo InlineInfo;
  DILineInfo Frame = getLineInfoForAddress(Address, Specifier);
  InlineInfo.addFrame(Frame);
  return InlineInfo;
}

 void emit_lineinfo(raw_ostream &Out, DIInliningInfo &DI)
 {
     uint32_t nframes = DI.getNumberOfFrames();
     std::vector<DILineInfo> DIvec(nframes);
     for (uint32_t i = 0; i < DI.getNumberOfFrames(); i++) {
         DIvec[i] = DI.getFrame(i);
     }
     emit_lineinfo(Out, DIvec);
 }

DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
    DILineInfoSpecifier Specifier) {
  DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
  if (!CU)
    return DIInliningInfo();

  const DWARFDebugInfoEntryInlinedChain &InlinedChain =
      CU->getInlinedChainForAddress(Address);
  if (InlinedChain.DIEs.size() == 0)
    return DIInliningInfo();

  DIInliningInfo InliningInfo;
  uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
  const DWARFLineTable *LineTable = 0;
  for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
    const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
    std::string FileName = "<invalid>";
    std::string FunctionName = "<invalid>";
    uint32_t Line = 0;
    uint32_t Column = 0;
    // Get function name if necessary.
    if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
      if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
        FunctionName = Name;
    }
    if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
      const bool NeedsAbsoluteFilePath =
          Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
      if (i == 0) {
        // For the topmost frame, initialize the line table of this
        // compile unit and fetch file/line info from it.
        LineTable = getLineTableForCompileUnit(CU);
        // For the topmost routine, get file/line info from line table.
        getFileLineInfoForCompileUnit(CU, LineTable, Address,
                                      NeedsAbsoluteFilePath,
                                      FileName, Line, Column);
      } else {
        // Otherwise, use call file, call line and call column from
        // previous DIE in inlined chain.
        getFileNameForCompileUnit(CU, LineTable, CallFile,
                                  NeedsAbsoluteFilePath, FileName);
        Line = CallLine;
        Column = CallColumn;
      }
      // Get call file/line/column of a current DIE.
      if (i + 1 < n) {
        FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
                                   CallColumn);
      }
    }
    DILineInfo Frame(StringRef(FileName), StringRef(FunctionName),
                     Line, Column);
    InliningInfo.addFrame(Frame);
  }
  return InliningInfo;
}

static void DumpInput(const StringRef &Filename) {
  OwningPtr<MemoryBuffer> Buff;

  if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
    errs() << Filename << ": " << ec.message() << "\n";
    return;
  }

  OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));
  if (!Obj) {
    errs() << Filename << ": Unknown object file format\n";
    return;
  }

  OwningPtr<DIContext> DICtx(DIContext::getDWARFContext(Obj.get()));

  if (Address == -1ULL) {
    outs() << Filename
           << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
    // Dump the complete DWARF structure.
    DICtx->dump(outs(), DumpType);
  } else {
    // Print line info for the specified address.
    int SpecFlags = DILineInfoSpecifier::FileLineInfo |
                    DILineInfoSpecifier::AbsoluteFilePath;
    if (PrintFunctions)
      SpecFlags |= DILineInfoSpecifier::FunctionName;
    if (PrintInlining) {
      DIInliningInfo InliningInfo =
        DICtx->getInliningInfoForAddress(Address, SpecFlags);
      uint32_t n = InliningInfo.getNumberOfFrames();
      if (n == 0) {
        // Print one empty debug line info in any case.
        PrintDILineInfo(DILineInfo());
      } else {
        for (uint32_t i = 0; i < n; i++) {
          DILineInfo dli = InliningInfo.getFrame(i);
          PrintDILineInfo(dli);
        }
      }
    } else {
      DILineInfo dli = DICtx->getLineInfoForAddress(Address, SpecFlags);
      PrintDILineInfo(dli);
    }
  }
}

DIInliningInfo ModuleInfo::symbolizeInlinedCode(
    uint64_t ModuleOffset, const LLVMSymbolizer::Options &Opts) const {
  DIInliningInfo InlinedContext;
  if (DebugInfoContext) {
    InlinedContext = DebugInfoContext->getInliningInfoForAddress(
        ModuleOffset, getDILineInfoSpecifierFlags(Opts));
  }
  // Make sure there is at least one frame in context.
  if (InlinedContext.getNumberOfFrames() == 0) {
    InlinedContext.addFrame(DILineInfo());
  }
  // Override the function name in lower frame with name from symbol table.
  if (Opts.PrintFunctions && Opts.UseSymbolTable) {
    DIInliningInfo PatchedInlinedContext;
    for (uint32_t i = 0, n = InlinedContext.getNumberOfFrames(); i < n; i++) {
      DILineInfo LineInfo = InlinedContext.getFrame(i);
      if (i == n - 1) {
        std::string FunctionName;
        uint64_t Start, Size;
        if (getNameFromSymbolTable(SymbolRef::ST_Function, ModuleOffset,
                                   FunctionName, Start, Size)) {
          patchFunctionNameInDILineInfo(FunctionName, LineInfo);
        }
      }
      PatchedInlinedContext.addFrame(LineInfo);
    }
    InlinedContext = PatchedInlinedContext;
  }
  return InlinedContext;
}

std::string LLVMSymbolizer::symbolizeCode(const std::string &ModuleName,
                                          uint64_t ModuleOffset) {
  ModuleInfo *Info = getOrCreateModuleInfo(ModuleName);
  if (Info == 0)
    return printDILineInfo(DILineInfo());
  if (Opts.PrintInlining) {
    DIInliningInfo InlinedContext =
        Info->symbolizeInlinedCode(ModuleOffset, Opts);
    uint32_t FramesNum = InlinedContext.getNumberOfFrames();
    assert(FramesNum > 0);
    std::string Result;
    for (uint32_t i = 0; i < FramesNum; i++) {
      DILineInfo LineInfo = InlinedContext.getFrame(i);
      Result += printDILineInfo(LineInfo);
    }
    return Result;
  }
  DILineInfo LineInfo = Info->symbolizeCode(ModuleOffset, Opts);
  return printDILineInfo(LineInfo);
}

ErrorOr<DIInliningInfo>
LLVMSymbolizer::symbolizeInlinedCode(const std::string &ModuleName,
                                     uint64_t ModuleOffset) {
  auto InfoOrErr = getOrCreateModuleInfo(ModuleName);
  if (auto EC = InfoOrErr.getError())
    return EC;
  SymbolizableModule *Info = InfoOrErr.get();

  // If the user is giving us relative addresses, add the preferred base of the
  // object to the offset before we do the query. It's what DIContext expects.
  if (Opts.RelativeAddresses)
    ModuleOffset += Info->getModulePreferredBase();

  DIInliningInfo InlinedContext = Info->symbolizeInlinedCode(
      ModuleOffset, Opts.PrintFunctions, Opts.UseSymbolTable);
  if (Opts.Demangle) {
    for (int i = 0, n = InlinedContext.getNumberOfFrames(); i < n; i++) {
      auto *Frame = InlinedContext.getMutableFrame(i);
      Frame->FunctionName = DemangleName(Frame->FunctionName, Info);
    }
  }
  return InlinedContext;
}

DIInliningInfo SymbolizableObjectFile::symbolizeInlinedCode(
    uint64_t ModuleOffset, FunctionNameKind FNKind, bool UseSymbolTable) const {
  DIInliningInfo InlinedContext;

  if (DebugInfoContext)
    InlinedContext = DebugInfoContext->getInliningInfoForAddress(
        ModuleOffset, getDILineInfoSpecifier(FNKind));
  // Make sure there is at least one frame in context.
  if (InlinedContext.getNumberOfFrames() == 0)
    InlinedContext.addFrame(DILineInfo());

  // Override the function name in lower frame with name from symbol table.
  if (shouldOverrideWithSymbolTable(FNKind, UseSymbolTable)) {
    std::string FunctionName;
    uint64_t Start, Size;
    if (getNameFromSymbolTable(SymbolRef::ST_Function, ModuleOffset,
                               FunctionName, Start, Size)) {
      InlinedContext.getMutableFrame(InlinedContext.getNumberOfFrames() - 1)
          ->FunctionName = FunctionName;
    }
  }

  return InlinedContext;
}

//.........这里部分代码省略.........
                        SymbolLookup,
                        &DisInfo)));
        }

        uint64_t nextLineAddr = -1;
        DILineInfoTable::iterator di_lineIter = di_lineinfo.begin();
        DILineInfoTable::iterator di_lineEnd = di_lineinfo.end();
        DILineInfoPrinter dbgctx{';', true};
        if (pass != 0) {
            if (di_ctx && di_lineIter != di_lineEnd) {
                // Set up the line info
                nextLineAddr = di_lineIter->first;
                if (nextLineAddr != (uint64_t)(Fptr + slide)) {
                    std::string buf;
                    dbgctx.emit_lineinfo(buf, di_lineIter->second);
                    if (!buf.empty()) {
                        Streamer->EmitRawText(buf);
                    }
                }
            }
        }

        uint64_t Index = 0;
        uint64_t insSize = 0;

        // Do the disassembly
        for (Index = 0; Index < Fsize; Index += insSize) {

            if (pass != 0 && nextLineAddr != (uint64_t)-1 && Index + Fptr + slide == nextLineAddr) {
                if (di_ctx) {
                    std::string buf;
                    DILineInfoSpecifier infoSpec(DILineInfoSpecifier::FileLineInfoKind::Default,
                                                 DILineInfoSpecifier::FunctionNameKind::ShortName);
                    DIInliningInfo dbg = di_ctx->getInliningInfoForAddress(Index + Fptr + slide, infoSpec);
                    if (dbg.getNumberOfFrames()) {
                        dbgctx.emit_lineinfo(buf, dbg);
                    }
                    else {
                        dbgctx.emit_lineinfo(buf, di_lineIter->second);
                    }
                    if (!buf.empty())
                        Streamer->EmitRawText(buf);
                    nextLineAddr = (++di_lineIter)->first;
                }
            }

            DisInfo.setIP(Fptr+Index);
            if (pass != 0) {
                // Uncomment this to output addresses for all instructions
                // stream << Index << ": ";
                MCSymbol *symbol = DisInfo.lookupSymbol(Fptr+Index);
                if (symbol)
                    Streamer->EmitLabel(symbol);
            }

            MCInst Inst;
            MCDisassembler::DecodeStatus S;
            FuncMCView view = memoryObject.slice(Index);
            S = DisAsm->getInstruction(Inst, insSize, view, 0,
                                      /*VStream*/ nulls(),
                                      /*CStream*/ pass != 0 ? Streamer->GetCommentOS() : nulls());
            if (pass != 0 && Streamer->GetCommentOS().tell() > 0)
                Streamer->GetCommentOS() << '\n';
            switch (S) {
            case MCDisassembler::Fail:
                if (insSize == 0) // skip illegible bytes

DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
    DILineInfoSpecifier Specifier) {
  DIInliningInfo InliningInfo;

  DWARFCompileUnit *CU = getCompileUnitForAddress(Address);
  if (!CU)
    return InliningInfo;

  const DWARFLineTable *LineTable = nullptr;
  const bool NeedsAbsoluteFilePath =
      Specifier.needs(DILineInfoSpecifier::AbsoluteFilePath);
  const DWARFDebugInfoEntryInlinedChain &InlinedChain =
      CU->getInlinedChainForAddress(Address);
  if (InlinedChain.DIEs.size() == 0) {
    // If there is no DIE for address (e.g. it is in unavailable .dwo file),
    // try to at least get file/line info from symbol table.
    if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
      DILineInfo Frame;
      LineTable = getLineTableForCompileUnit(CU);
      if (getFileLineInfoForCompileUnit(CU, LineTable, Address,
                                        NeedsAbsoluteFilePath, Frame)) {
        InliningInfo.addFrame(Frame);
      }
    }
    return InliningInfo;
  }

  uint32_t CallFile = 0, CallLine = 0, CallColumn = 0;
  for (uint32_t i = 0, n = InlinedChain.DIEs.size(); i != n; i++) {
    const DWARFDebugInfoEntryMinimal &FunctionDIE = InlinedChain.DIEs[i];
    DILineInfo Frame;
    // Get function name if necessary.
    if (Specifier.needs(DILineInfoSpecifier::FunctionName)) {
      if (const char *Name = FunctionDIE.getSubroutineName(InlinedChain.U))
        Frame.FunctionName = Name;
    }
    if (Specifier.needs(DILineInfoSpecifier::FileLineInfo)) {
      if (i == 0) {
        // For the topmost frame, initialize the line table of this
        // compile unit and fetch file/line info from it.
        LineTable = getLineTableForCompileUnit(CU);
        // For the topmost routine, get file/line info from line table.
        getFileLineInfoForCompileUnit(CU, LineTable, Address,
                                      NeedsAbsoluteFilePath, Frame);
      } else {
        // Otherwise, use call file, call line and call column from
        // previous DIE in inlined chain.
        getFileNameForCompileUnit(CU, LineTable, CallFile,
                                  NeedsAbsoluteFilePath, Frame.FileName);
        Frame.Line = CallLine;
        Frame.Column = CallColumn;
      }
      // Get call file/line/column of a current DIE.
      if (i + 1 < n) {
        FunctionDIE.getCallerFrame(InlinedChain.U, CallFile, CallLine,
                                   CallColumn);
      }
    }
    InliningInfo.addFrame(Frame);
  }
  return InliningInfo;
}