1 //===-- DWARFDebugLoc.cpp -------------------------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "DWARFDebugLoc.h"
11 #include "llvm/Support/Compiler.h"
12 #include "llvm/Support/Format.h"
13 #include "llvm/Support/raw_ostream.h"
17 void DWARFDebugLoc::dump(raw_ostream &OS) const {
18 for (LocationLists::const_iterator I = Locations.begin(), E = Locations.end(); I != E; ++I) {
19 OS << format("0x%8.8x: ", I->Offset);
20 const unsigned Indent = 12;
21 for (SmallVectorImpl<Entry>::const_iterator I2 = I->Entries.begin(), E2 = I->Entries.end(); I2 != E2; ++I2) {
22 if (I2 != I->Entries.begin())
24 OS << "Beginning address offset: " << format("0x%016" PRIx64, I2->Begin)
26 OS.indent(Indent) << " Ending address offset: "
27 << format("0x%016" PRIx64, I2->End) << '\n';
28 OS.indent(Indent) << " Location description: ";
29 for (SmallVectorImpl<unsigned char>::const_iterator I3 = I2->Loc.begin(), E3 = I2->Loc.end(); I3 != E3; ++I3) {
30 OS << format("%2.2x ", *I3);
37 void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
39 while (data.isValidOffset(Offset)) {
40 Locations.resize(Locations.size() + 1);
41 LocationList &Loc = Locations.back();
43 // 2.6.2 Location Lists
44 // A location list entry consists of:
47 RelocAddrMap::const_iterator AI = RelocMap.find(Offset);
48 // 1. A beginning address offset. ...
49 E.Begin = data.getUnsigned(&Offset, AddressSize);
50 if (AI != RelocMap.end())
51 E.Begin += AI->second.second;
53 AI = RelocMap.find(Offset);
54 // 2. An ending address offset. ...
55 E.End = data.getUnsigned(&Offset, AddressSize);
56 if (AI != RelocMap.end())
57 E.End += AI->second.second;
59 // The end of any given location list is marked by an end of list entry,
60 // which consists of a 0 for the beginning address offset and a 0 for the
61 // ending address offset.
62 if (E.Begin == 0 && E.End == 0)
65 unsigned Bytes = data.getU16(&Offset);
66 // A single location description describing the location of the object...
67 StringRef str = data.getData().substr(Offset, Bytes);
69 E.Loc.reserve(str.size());
70 std::copy(str.begin(), str.end(), std::back_inserter(E.Loc));
71 Loc.Entries.push_back(llvm_move(E));