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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 "DWARFDebugLoc.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void DWARFDebugLoc::dump(raw_ostream &OS) const {
for (LocationLists::const_iterator I = Locations.begin(), E = Locations.end(); I != E; ++I) {
OS << format("0x%8.8x: ", I->Offset);
const unsigned Indent = 12;
for (SmallVectorImpl<Entry>::const_iterator I2 = I->Entries.begin(), E2 = I->Entries.end(); I2 != E2; ++I2) {
if (I2 != I->Entries.begin())
OS.indent(Indent);
OS << "Beginning address offset: " << format("0x%016" PRIx64, I2->Begin)
<< '\n';
OS.indent(Indent) << " Ending address offset: "
<< format("0x%016" PRIx64, I2->End) << '\n';
OS.indent(Indent) << " Location description: ";
for (SmallVectorImpl<unsigned char>::const_iterator I3 = I2->Loc.begin(), E3 = I2->Loc.end(); I3 != E3; ++I3) {
OS << format("%2.2x ", *I3);
}
OS << "\n\n";
}
}
}
void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
uint32_t Offset = 0;
while (data.isValidOffset(Offset)) {
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.reserve(str.size());
std::copy(str.begin(), str.end(), std::back_inserter(E.Loc));
Loc.Entries.push_back(llvm_move(E));
}
}
}
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