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//===-- DWARFDebugRangesList.cpp ------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "DWARFDebugRangeList.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
void DWARFDebugRangeList::clear() {
Offset = -1U;
AddressSize = 0;
Entries.clear();
}
bool DWARFDebugRangeList::extract(DataExtractor data, uint32_t *offset_ptr) {
clear();
if (!data.isValidOffset(*offset_ptr))
return false;
AddressSize = data.getAddressSize();
if (AddressSize != 4 && AddressSize != 8)
return false;
Offset = *offset_ptr;
while (true) {
RangeListEntry entry;
uint32_t prev_offset = *offset_ptr;
entry.StartAddress = data.getAddress(offset_ptr);
entry.EndAddress = data.getAddress(offset_ptr);
// Check that both values were extracted correctly.
if (*offset_ptr != prev_offset + 2 * AddressSize) {
clear();
return false;
}
if (entry.isEndOfListEntry())
break;
Entries.push_back(entry);
}
return true;
}
void DWARFDebugRangeList::dump(raw_ostream &OS) const {
for (const RangeListEntry &RLE : Entries) {
const char *format_str = (AddressSize == 4
? "%08x %08" PRIx64 " %08" PRIx64 "\n"
: "%08x %016" PRIx64 " %016" PRIx64 "\n");
OS << format(format_str, Offset, RLE.StartAddress, RLE.EndAddress);
}
OS << format("%08x <End of list>\n", Offset);
}
DWARFAddressRangesVector
DWARFDebugRangeList::getAbsoluteRanges(uint64_t BaseAddress) const {
DWARFAddressRangesVector Res;
for (const RangeListEntry &RLE : Entries) {
if (RLE.isBaseAddressSelectionEntry(AddressSize)) {
BaseAddress = RLE.EndAddress;
} else {
Res.push_back(std::make_pair(BaseAddress + RLE.StartAddress,
BaseAddress + RLE.EndAddress));
}
}
return Res;
}
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