forked from OSchip/llvm-project
124 lines
4.0 KiB
C++
124 lines
4.0 KiB
C++
//===- DWARFDebugLoc.cpp --------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cinttypes>
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#include <cstdint>
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using namespace llvm;
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void DWARFDebugLoc::dump(raw_ostream &OS) const {
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for (const LocationList &L : Locations) {
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OS << format("0x%8.8x: ", L.Offset);
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const unsigned Indent = 12;
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for (const Entry &E : L.Entries) {
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if (&E != L.Entries.begin())
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OS.indent(Indent);
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OS << "Beginning address offset: " << format("0x%016" PRIx64, E.Begin)
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<< '\n';
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OS.indent(Indent) << " Ending address offset: "
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<< format("0x%016" PRIx64, E.End) << '\n';
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OS.indent(Indent) << " Location description: ";
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for (unsigned char Loc : E.Loc) {
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OS << format("%2.2x ", Loc);
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}
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OS << "\n\n";
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}
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}
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}
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void DWARFDebugLoc::parse(const DWARFDataExtractor &data) {
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uint32_t Offset = 0;
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while (data.isValidOffset(Offset+data.getAddressSize()-1)) {
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Locations.resize(Locations.size() + 1);
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LocationList &Loc = Locations.back();
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Loc.Offset = Offset;
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// 2.6.2 Location Lists
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// A location list entry consists of:
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while (true) {
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// A beginning and ending address offsets.
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Entry E;
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E.Begin = data.getRelocatedAddress(&Offset);
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E.End = data.getRelocatedAddress(&Offset);
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// The end of any given location list is marked by an end of list entry,
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// which consists of a 0 for the beginning address offset and a 0 for the
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// ending address offset.
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if (E.Begin == 0 && E.End == 0)
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break;
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unsigned Bytes = data.getU16(&Offset);
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// A single location description describing the location of the object...
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StringRef str = data.getData().substr(Offset, Bytes);
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Offset += Bytes;
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E.Loc.append(str.begin(), str.end());
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Loc.Entries.push_back(std::move(E));
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}
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}
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if (data.isValidOffset(Offset))
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errs() << "error: failed to consume entire .debug_loc section\n";
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}
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void DWARFDebugLocDWO::parse(DataExtractor data) {
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uint32_t Offset = 0;
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while (data.isValidOffset(Offset)) {
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Locations.resize(Locations.size() + 1);
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LocationList &Loc = Locations.back();
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Loc.Offset = Offset;
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dwarf::LocationListEntry Kind;
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while ((Kind = static_cast<dwarf::LocationListEntry>(
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data.getU8(&Offset))) != dwarf::DW_LLE_end_of_list) {
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if (Kind != dwarf::DW_LLE_startx_length) {
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errs() << "error: dumping support for LLE of kind " << (int)Kind
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<< " not implemented\n";
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return;
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}
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Entry E;
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E.Start = data.getULEB128(&Offset);
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E.Length = data.getU32(&Offset);
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unsigned Bytes = data.getU16(&Offset);
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// A single location description describing the location of the object...
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StringRef str = data.getData().substr(Offset, Bytes);
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Offset += Bytes;
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E.Loc.resize(str.size());
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std::copy(str.begin(), str.end(), E.Loc.begin());
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Loc.Entries.push_back(std::move(E));
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}
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}
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}
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void DWARFDebugLocDWO::dump(raw_ostream &OS) const {
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for (const LocationList &L : Locations) {
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OS << format("0x%8.8x: ", L.Offset);
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const unsigned Indent = 12;
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for (const Entry &E : L.Entries) {
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if (&E != L.Entries.begin())
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OS.indent(Indent);
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OS << "Beginning address index: " << E.Start << '\n';
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OS.indent(Indent) << " Length: " << E.Length << '\n';
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OS.indent(Indent) << " Location description: ";
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for (unsigned char Loc : E.Loc)
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OS << format("%2.2x ", Loc);
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OS << "\n\n";
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}
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}
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}
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