| //===-- 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)); |
| } |
| } |
| } |