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//===- DWARFDebugLoc.cpp --------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/StringRef.h"
#include "llvm/DebugInfo/DWARF/DWARFDebugLoc.h"
#include "llvm/DebugInfo/DWARF/DWARFRelocMap.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cinttypes>
#include <cstdint>
using namespace llvm;
void DWARFDebugLoc::dump(raw_ostream &OS) const {
for (const LocationList &L : Locations) {
OS << format("0x%8.8x: ", L.Offset);
const unsigned Indent = 12;
for (const Entry &E : L.Entries) {
if (&E != L.Entries.begin())
OS.indent(Indent);
OS << "Beginning address offset: " << format("0x%016" PRIx64, E.Begin)
<< '\n';
OS.indent(Indent) << " Ending address offset: "
<< format("0x%016" PRIx64, E.End) << '\n';
OS.indent(Indent) << " Location description: ";
for (unsigned char Loc : E.Loc) {
OS << format("%2.2x ", Loc);
}
OS << "\n\n";
}
}
}
void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset+AddressSize-1)) {
Locations.resize(Locations.size() + 1);
LocationList &Loc = Locations.back();
Loc.Offset = Offset;
// 2.6.2 Location Lists
// A location list entry consists of:
while (true) {
Entry E;
RelocAddrMap::const_iterator AI = RelocMap.find(Offset);
// 1. A beginning address offset. ...
E.Begin = data.getUnsigned(&Offset, AddressSize);
if (AI != RelocMap.end())
E.Begin += AI->second.second;
AI = RelocMap.find(Offset);
// 2. An ending address offset. ...
E.End = data.getUnsigned(&Offset, AddressSize);
if (AI != RelocMap.end())
E.End += AI->second.second;
// The end of any given location list is marked by an end of list entry,
// which consists of a 0 for the beginning address offset and a 0 for the
// ending address offset.
if (E.Begin == 0 && E.End == 0)
break;
unsigned Bytes = data.getU16(&Offset);
// A single location description describing the location of the object...
StringRef str = data.getData().substr(Offset, Bytes);
Offset += Bytes;
E.Loc.append(str.begin(), str.end());
Loc.Entries.push_back(std::move(E));
}
}
if (data.isValidOffset(Offset))
errs() << "error: failed to consume entire .debug_loc section\n";
}
void DWARFDebugLocDWO::parse(DataExtractor data) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset)) {
Locations.resize(Locations.size() + 1);
LocationList &Loc = Locations.back();
Loc.Offset = Offset;
dwarf::LocationListEntry Kind;
while ((Kind = static_cast<dwarf::LocationListEntry>(
data.getU8(&Offset))) != dwarf::DW_LLE_end_of_list) {
if (Kind != dwarf::DW_LLE_startx_length) {
errs() << "error: dumping support for LLE of kind " << (int)Kind
<< " not implemented\n";
return;
}
Entry E;
E.Start = data.getULEB128(&Offset);
E.Length = data.getU32(&Offset);
unsigned Bytes = data.getU16(&Offset);
// A single location description describing the location of the object...
StringRef str = data.getData().substr(Offset, Bytes);
Offset += Bytes;
E.Loc.resize(str.size());
std::copy(str.begin(), str.end(), E.Loc.begin());
Loc.Entries.push_back(std::move(E));
}
}
}
void DWARFDebugLocDWO::dump(raw_ostream &OS) const {
for (const LocationList &L : Locations) {
OS << format("0x%8.8x: ", L.Offset);
const unsigned Indent = 12;
for (const Entry &E : L.Entries) {
if (&E != L.Entries.begin())
OS.indent(Indent);
OS << "Beginning address index: " << E.Start << '\n';
OS.indent(Indent) << " Length: " << E.Length << '\n';
OS.indent(Indent) << " Location description: ";
for (unsigned char Loc : E.Loc)
OS << format("%2.2x ", Loc);
OS << "\n\n";
}
}
}
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