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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "Dwarf.h" 10 #include "InputFiles.h" 11 #include "InputSection.h" 12 #include "OutputSegment.h" 13 14 #include <memory> 15 16 using namespace lld; 17 using namespace lld::macho; 18 using namespace llvm; 19 20 std::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 the 24 // debug info, so we initialize DwarfObject with just the sections necessary 25 // to get that path. The debugger will locate the debug info via the object 26 // 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::debugAbbrev, &dObj->abbrevSection) 34 .Case(section_names::debugStr, &dObj->strSection) 35 .Default(nullptr)) { 36 *s = toStringRef(isec->data); 37 hasDwarfInfo = true; 38 } 39 } 40 41 if (hasDwarfInfo) 42 return dObj; 43 return nullptr; 44 } 45