f2c7f75f61
In DWARF5, the `DW_AT_name` and `DW_AT_comp_dir` attributes are encoded using the `strx*` forms, which specify an index into `__debug_str_offs`. This commit adds that section to DwarfObject, so the debug info parser can resolve these references. The test case was manually adapted from stabs-icf.s. Fixes #51668 Differential Revision: https://reviews.llvm.org/D130559
46 lines
1.7 KiB
C++
46 lines
1.7 KiB
C++
//===- DWARF.cpp ----------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Dwarf.h"
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#include "InputFiles.h"
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#include "InputSection.h"
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#include "OutputSegment.h"
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#include <memory>
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using namespace lld;
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using namespace lld::macho;
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using namespace llvm;
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std::unique_ptr<DwarfObject> DwarfObject::create(ObjFile *obj) {
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auto dObj = std::make_unique<DwarfObject>();
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bool hasDwarfInfo = false;
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// LLD only needs to extract the source file path and line numbers from the
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// debug info, so we initialize DwarfObject with just the sections necessary
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// to get that path. The debugger will locate the debug info via the object
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// file paths that we emit in our STABS symbols, so we don't need to process &
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// emit them ourselves.
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for (const InputSection *isec : obj->debugSections) {
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if (StringRef *s =
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StringSwitch<StringRef *>(isec->getName())
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.Case(section_names::debugInfo, &dObj->infoSection.Data)
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.Case(section_names::debugLine, &dObj->lineSection.Data)
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.Case(section_names::debugStrOffs, &dObj->strOffsSection.Data)
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.Case(section_names::debugAbbrev, &dObj->abbrevSection)
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.Case(section_names::debugStr, &dObj->strSection)
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.Default(nullptr)) {
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*s = toStringRef(isec->data);
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hasDwarfInfo = true;
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}
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}
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if (hasDwarfInfo)
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return dObj;
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return nullptr;
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}
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