diff options
Diffstat (limited to 'lib/DebugInfo/DWARFDebugRangeList.cpp')
-rw-r--r-- | lib/DebugInfo/DWARFDebugRangeList.cpp | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/lib/DebugInfo/DWARFDebugRangeList.cpp b/lib/DebugInfo/DWARFDebugRangeList.cpp new file mode 100644 index 0000000000..10f51b4aa0 --- /dev/null +++ b/lib/DebugInfo/DWARFDebugRangeList.cpp @@ -0,0 +1,58 @@ +//===-- 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; + } + // The end of any given range 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 (entry.StartAddress == 0 && entry.EndAddress == 0) + 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 %08x %08x\n" + : "%08x %016x %016x\n"; + OS << format(format_str, Offset, Entries[i].StartAddress, + Entries[i].EndAddress); + } + OS << format("%08x <End of list>\n", Offset); +} |