llvm-project/llvm/tools/obj2yaml/dwarf2yaml.cpp

//===------ dwarf2yaml.cpp - obj2yaml conversion tool -----------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "Error.h"
#include "llvm/DebugInfo/DWARF/DWARFContext.h"
#include "llvm/ObjectYAML/DWARFYAML.h"

using namespace llvm;

void dumpDebugAbbrev(DWARFContextInMemory &DCtx, DWARFYAML::DWARFData &Y) {
  auto AbbrevSetPtr = DCtx.getDebugAbbrev();
  if (AbbrevSetPtr) {
    for (auto AbbrvDeclSet : *AbbrevSetPtr) {
      for (auto AbbrvDecl : AbbrvDeclSet.second) {
        DWARFYAML::DWARFAbbrev Abbrv;
        Abbrv.Code = AbbrvDecl.getCode();
        Abbrv.Tag = AbbrvDecl.getTag();
        Abbrv.Children = AbbrvDecl.hasChildren() ? dwarf::DW_CHILDREN_yes
                                                 : dwarf::DW_CHILDREN_no;
        for (auto Attribute : AbbrvDecl.attributes()) {
          DWARFYAML::DWARFAttributeAbbrev AttAbrv;
          AttAbrv.Attribute = Attribute.Attr;
          AttAbrv.Form = Attribute.Form;
          Abbrv.Attributes.push_back(AttAbrv);
        }
        Y.AbbrevDecls.push_back(Abbrv);
      }
    }
  }
}

void dumpDebugStrings(DWARFContextInMemory &DCtx, DWARFYAML::DWARFData &Y) {
  StringRef RemainingTable = DCtx.getStringSection();
  while (RemainingTable.size() > 0) {
    auto SymbolPair = RemainingTable.split('\0');
    RemainingTable = SymbolPair.second;
    Y.DebugStrings.push_back(SymbolPair.first);
  }
}

std::error_code dwarf2yaml(DWARFContextInMemory &DCtx,
                           DWARFYAML::DWARFData &Y) {
  dumpDebugAbbrev(DCtx, Y);
  dumpDebugStrings(DCtx, Y);

  return obj2yaml_error::success;
}