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1 //===- DWARF.cpp ----------------------------------------------------------===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "Dwarf.h"
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10 #include "InputFiles.h"
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11 #include "InputSection.h"
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12 #include "OutputSegment.h"
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13
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14 #include <memory>
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15
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16 using namespace lld;
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17 using namespace lld::macho;
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18 using namespace llvm;
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19
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20 std::unique_ptr<DwarfObject> DwarfObject::create(ObjFile *obj) {
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21 auto dObj = std::make_unique<DwarfObject>();
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22 bool hasDwarfInfo = false;
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23 // LLD only needs to extract the source file path from the debug info, so we
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24 // initialize DwarfObject with just the sections necessary to get that path.
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25 // The debugger will locate the debug info via the object file paths that we
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26 // emit in our STABS symbols, so we don't need to process & emit them
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27 // ourselves.
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28 for (const InputSection *isec : obj->debugSections) {
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29 if (StringRef *s =
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30 StringSwitch<StringRef *>(isec->name)
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31 .Case(section_names::debugInfo, &dObj->infoSection.Data)
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32 .Case(section_names::debugAbbrev, &dObj->abbrevSection)
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33 .Case(section_names::debugStr, &dObj->strSection)
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34 .Default(nullptr)) {
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35 *s = toStringRef(isec->data);
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36 hasDwarfInfo = true;
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37 }
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38 }
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39
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40 if (hasDwarfInfo)
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41 return dObj;
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42 return nullptr;
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43 }
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