46 lines · cpp
1//===- DWARF.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-exception6//7//===----------------------------------------------------------------------===//8 9#include "Dwarf.h"10#include "InputFiles.h"11#include "InputSection.h"12#include "OutputSegment.h"13 14#include <memory>15 16using namespace lld;17using namespace lld::macho;18using namespace llvm;19 20std::unique_ptr<DwarfObject> DwarfObject::create(ObjFile *obj) {21 auto dObj = std::make_unique<DwarfObject>();22 bool hasDwarfInfo = false;23 // LLD only needs to extract the source file path and line numbers from the24 // debug info, so we initialize DwarfObject with just the sections necessary25 // to get that path. The debugger will locate the debug info via the object26 // file paths that we emit in our STABS symbols, so we don't need to process &27 // emit them ourselves.28 for (const InputSection *isec : obj->debugSections) {29 if (StringRef *s =30 StringSwitch<StringRef *>(isec->getName())31 .Case(section_names::debugInfo, &dObj->infoSection.Data)32 .Case(section_names::debugLine, &dObj->lineSection.Data)33 .Case(section_names::debugStrOffs, &dObj->strOffsSection.Data)34 .Case(section_names::debugAbbrev, &dObj->abbrevSection)35 .Case(section_names::debugStr, &dObj->strSection)36 .Default(nullptr)) {37 *s = toStringRef(isec->data);38 hasDwarfInfo = true;39 }40 }41 42 if (hasDwarfInfo)43 return dObj;44 return nullptr;45}46