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e970c2c743
This is splitted from D32228, currently DWARF parsers code has few places that applied relocations values manually. These places has similar duplicated code. Patch introduces separate method that can be used to obtain relocated value. That helps to reduce code and simplifies things. Differential revision: https://reviews.llvm.org/D32284 llvm-svn: 300956
124 lines
4.1 KiB
C++
124 lines
4.1 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/ADT/StringRef.h"
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#include "llvm/DebugInfo/DWARF/DWARFContext.h"
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#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
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#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
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#include "llvm/Support/Dwarf.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(DataExtractor data, unsigned AddressSize) {
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uint32_t Offset = 0;
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while (data.isValidOffset(Offset+AddressSize-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 = getRelocatedValue(data, AddressSize, &Offset, &RelocMap);
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E.End = getRelocatedValue(data, AddressSize, &Offset, &RelocMap);
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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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