C++ DIInliningInfo::getNumberOfFrames方法代码示例

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;
}

 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 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;
}

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);
    }
  }
}

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;
}

//.........这里部分代码省略.........
                        &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
#if defined(_CPU_PPC_) || defined(_CPU_PPC64_) || defined(_CPU_ARM_) || defined(_CPU_AARCH64_)