1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
|
//===- DWARFDebugPubTable.cpp ---------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/DWARF/DWARFDebugPubTable.h"
#include "llvm/DebugInfo/DWARF/DWARFDataExtractor.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/BinaryFormat/Dwarf.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
#include <cstdint>
using namespace llvm;
using namespace dwarf;
void DWARFDebugPubTable::extract(
DWARFDataExtractor Data, bool GnuStyle,
function_ref<void(Error)> RecoverableErrorHandler) {
this->GnuStyle = GnuStyle;
Sets.clear();
uint64_t Offset = 0;
while (Data.isValidOffset(Offset)) {
uint64_t SetOffset = Offset;
Sets.push_back({});
Set &NewSet = Sets.back();
DataExtractor::Cursor C(Offset);
std::tie(NewSet.Length, NewSet.Format) = Data.getInitialLength(C);
if (!C) {
// Drop the newly added set because it does not contain anything useful
// to dump.
Sets.pop_back();
RecoverableErrorHandler(createStringError(
errc::invalid_argument,
"name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
SetOffset, toString(C.takeError()).c_str()));
return;
}
Offset = C.tell() + NewSet.Length;
DWARFDataExtractor SetData(Data, Offset);
const unsigned OffsetSize = dwarf::getDwarfOffsetByteSize(NewSet.Format);
NewSet.Version = SetData.getU16(C);
NewSet.Offset = SetData.getRelocatedValue(C, OffsetSize);
NewSet.Size = SetData.getUnsigned(C, OffsetSize);
if (!C) {
// Preserve the newly added set because at least some fields of the header
// are read and can be dumped.
RecoverableErrorHandler(
createStringError(errc::invalid_argument,
"name lookup table at offset 0x%" PRIx64
" does not have a complete header: %s",
SetOffset, toString(C.takeError()).c_str()));
continue;
}
while (C) {
uint64_t DieRef = SetData.getUnsigned(C, OffsetSize);
if (DieRef == 0)
break;
uint8_t IndexEntryValue = GnuStyle ? SetData.getU8(C) : 0;
StringRef Name = SetData.getCStrRef(C);
if (C)
NewSet.Entries.push_back(
{DieRef, PubIndexEntryDescriptor(IndexEntryValue), Name});
}
if (!C) {
RecoverableErrorHandler(createStringError(
errc::invalid_argument,
"name lookup table at offset 0x%" PRIx64 " parsing failed: %s",
SetOffset, toString(C.takeError()).c_str()));
continue;
}
if (C.tell() != Offset)
RecoverableErrorHandler(createStringError(
errc::invalid_argument,
"name lookup table at offset 0x%" PRIx64
" has a terminator at offset 0x%" PRIx64
" before the expected end at 0x%" PRIx64,
SetOffset, C.tell() - OffsetSize, Offset - OffsetSize));
}
}
void DWARFDebugPubTable::dump(raw_ostream &OS) const {
for (const Set &S : Sets) {
int OffsetDumpWidth = 2 * dwarf::getDwarfOffsetByteSize(S.Format);
OS << "length = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Length);
OS << ", format = " << dwarf::FormatString(S.Format);
OS << ", version = " << format("0x%04x", S.Version);
OS << ", unit_offset = "
<< format("0x%0*" PRIx64, OffsetDumpWidth, S.Offset);
OS << ", unit_size = " << format("0x%0*" PRIx64, OffsetDumpWidth, S.Size)
<< '\n';
OS << (GnuStyle ? "Offset Linkage Kind Name\n"
: "Offset Name\n");
for (const Entry &E : S.Entries) {
OS << format("0x%0*" PRIx64 " ", OffsetDumpWidth, E.SecOffset);
if (GnuStyle) {
StringRef EntryLinkage =
GDBIndexEntryLinkageString(E.Descriptor.Linkage);
StringRef EntryKind = dwarf::GDBIndexEntryKindString(E.Descriptor.Kind);
OS << format("%-8s", EntryLinkage.data()) << ' '
<< format("%-8s", EntryKind.data()) << ' ';
}
OS << '\"' << E.Name << "\"\n";
}
}
}
|
