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"
14 #include "llvm/Support/Dwarf.h"
18 void DWARFDebugLoc::dump(raw_ostream &OS) const {
19 for (const LocationList &L : Locations) {
20 OS << format("0x%8.8x: ", L.Offset);
21 const unsigned Indent = 12;
22 for (const Entry &E : L.Entries) {
23 if (&E != L.Entries.begin())
25 OS << "Beginning address offset: " << format("0x%016" PRIx64, E.Begin)
27 OS.indent(Indent) << " Ending address offset: "
28 << format("0x%016" PRIx64, E.End) << '\n';
29 OS.indent(Indent) << " Location description: ";
30 for (unsigned char Loc : E.Loc) {
31 OS << format("%2.2x ", Loc);
38 void DWARFDebugLoc::parse(DataExtractor data, unsigned AddressSize) {
40 while (data.isValidOffset(Offset+AddressSize-1)) {
41 Locations.resize(Locations.size() + 1);
42 LocationList &Loc = Locations.back();
44 // 2.6.2 Location Lists
45 // A location list entry consists of:
48 RelocAddrMap::const_iterator AI = RelocMap.find(Offset);
49 // 1. A beginning address offset. ...
50 E.Begin = data.getUnsigned(&Offset, AddressSize);
51 if (AI != RelocMap.end())
52 E.Begin += AI->second.second;
54 AI = RelocMap.find(Offset);
55 // 2. An ending address offset. ...
56 E.End = data.getUnsigned(&Offset, AddressSize);
57 if (AI != RelocMap.end())
58 E.End += AI->second.second;
60 // The end of any given location list is marked by an end of list entry,
61 // which consists of a 0 for the beginning address offset and a 0 for the
62 // ending address offset.
63 if (E.Begin == 0 && E.End == 0)
66 unsigned Bytes = data.getU16(&Offset);
67 // A single location description describing the location of the object...
68 StringRef str = data.getData().substr(Offset, Bytes);
70 E.Loc.reserve(str.size());
71 std::copy(str.begin(), str.end(), std::back_inserter(E.Loc));
72 Loc.Entries.push_back(std::move(E));
75 if (data.isValidOffset(Offset))
76 llvm::errs() << "error: failed to consume entire .debug_loc section\n";
79 void DWARFDebugLocDWO::parse(DataExtractor data) {
81 while (data.isValidOffset(Offset)) {
82 Locations.resize(Locations.size() + 1);
83 LocationList &Loc = Locations.back();
85 dwarf::LocationListEntry Kind;
86 while ((Kind = static_cast<dwarf::LocationListEntry>(
87 data.getU8(&Offset))) != dwarf::DW_LLE_end_of_list_entry) {
89 if (Kind != dwarf::DW_LLE_start_length_entry) {
90 llvm::errs() << "error: dumping support for LLE of kind " << (int)Kind
91 << " not implemented\n";
97 E.Start = data.getULEB128(&Offset);
98 E.Length = data.getU32(&Offset);
100 unsigned Bytes = data.getU16(&Offset);
101 // A single location description describing the location of the object...
102 StringRef str = data.getData().substr(Offset, Bytes);
104 E.Loc.resize(str.size());
105 std::copy(str.begin(), str.end(), E.Loc.begin());
107 Loc.Entries.push_back(std::move(E));
112 void DWARFDebugLocDWO::dump(raw_ostream &OS) const {
113 for (const LocationList &L : Locations) {
114 OS << format("0x%8.8x: ", L.Offset);
115 const unsigned Indent = 12;
116 for (const Entry &E : L.Entries) {
117 if (&E != L.Entries.begin())
119 OS << "Beginning address index: " << E.Start << '\n';
120 OS.indent(Indent) << " Length: " << E.Length << '\n';
121 OS.indent(Indent) << " Location description: ";
122 for (unsigned char Loc : E.Loc)
123 OS << format("%2.2x ", Loc);