| 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(S: section_names::debugInfo, Value: &dObj->infoSection.Data) |
| 32 | .Case(S: section_names::debugLine, Value: &dObj->lineSection.Data) |
| 33 | .Case(S: section_names::debugStrOffs, Value: &dObj->strOffsSection.Data) |
| 34 | .Case(S: section_names::debugAbbrev, Value: &dObj->abbrevSection) |
| 35 | .Case(S: section_names::debugStr, Value: &dObj->strSection) |
| 36 | .Default(Value: nullptr)) { |
| 37 | *s = toStringRef(Input: isec->data); |
| 38 | hasDwarfInfo = true; |
| 39 | } |
| 40 | } |
| 41 | |
| 42 | if (hasDwarfInfo) |
| 43 | return dObj; |
| 44 | return nullptr; |
| 45 | } |
| 46 |