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llvm-6502/lib/DebugInfo/DWARFDebugRangeList.cpp
Alexey Samsonov 5eae90d727 Add support for fetching inlining context (stack of source code locations)
by instruction address from DWARF.

Add --inlining flag to llvm-dwarfdump to demonstrate and test this functionality,
so that "llvm-dwarfdump --inlining --address=0x..." now works much like
"addr2line -i 0x...", provided that the binary has debug info
(Clang's -gline-tables-only *is* enough).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@163128 91177308-0d34-0410-b5e6-96231b3b80d8
2012-09-04 08:12:33 +00:00

68 lines
2.1 KiB
C++

//===-- 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 (int i = 0, n = Entries.size(); i != n; ++i) {
const char *format_str = (AddressSize == 4
? "%08x %08" PRIx64 " %08" PRIx64 "\n"
: "%08x %016" PRIx64 " %016" PRIx64 "\n");
OS << format(format_str, Offset, Entries[i].StartAddress,
Entries[i].EndAddress);
}
OS << format("%08x <End of list>\n", Offset);
}
bool DWARFDebugRangeList::containsAddress(uint64_t BaseAddress,
uint64_t Address) const {
for (int i = 0, n = Entries.size(); i != n; ++i) {
if (Entries[i].isBaseAddressSelectionEntry(AddressSize))
BaseAddress = Entries[i].EndAddress;
else if (Entries[i].containsAddress(BaseAddress, Address))
return true;
}
return false;
}