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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
|
//===-- ObjectFileBreakpad.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 "Plugins/ObjectFile/Breakpad/ObjectFileBreakpad.h"
#include "Plugins/ObjectFile/Breakpad/BreakpadRecords.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
using namespace lldb;
using namespace lldb_private;
using namespace lldb_private::breakpad;
LLDB_PLUGIN_DEFINE(ObjectFileBreakpad)
namespace {
struct Header {
ArchSpec arch;
UUID uuid;
static llvm::Optional<Header> parse(llvm::StringRef text);
};
} // namespace
llvm::Optional<Header> Header::parse(llvm::StringRef text) {
llvm::StringRef line;
std::tie(line, text) = text.split('\n');
auto Module = ModuleRecord::parse(line);
if (!Module)
return llvm::None;
llvm::Triple triple;
triple.setArch(Module->Arch);
triple.setOS(Module->OS);
std::tie(line, text) = text.split('\n');
auto Info = InfoRecord::parse(line);
UUID uuid = Info && Info->ID ? Info->ID : Module->ID;
return Header{ArchSpec(triple), std::move(uuid)};
}
char ObjectFileBreakpad::ID;
void ObjectFileBreakpad::Initialize() {
PluginManager::RegisterPlugin(GetPluginNameStatic(),
GetPluginDescriptionStatic(), CreateInstance,
CreateMemoryInstance, GetModuleSpecifications);
}
void ObjectFileBreakpad::Terminate() {
PluginManager::UnregisterPlugin(CreateInstance);
}
ConstString ObjectFileBreakpad::GetPluginNameStatic() {
static ConstString g_name("breakpad");
return g_name;
}
ObjectFile *ObjectFileBreakpad::CreateInstance(
const ModuleSP &module_sp, DataBufferSP &data_sp, offset_t data_offset,
const FileSpec *file, offset_t file_offset, offset_t length) {
if (!data_sp) {
data_sp = MapFileData(*file, length, file_offset);
if (!data_sp)
return nullptr;
data_offset = 0;
}
auto text = toStringRef(data_sp->GetData());
llvm::Optional<Header> header = Header::parse(text);
if (!header)
return nullptr;
// Update the data to contain the entire file if it doesn't already
if (data_sp->GetByteSize() < length) {
data_sp = MapFileData(*file, length, file_offset);
if (!data_sp)
return nullptr;
data_offset = 0;
}
return new ObjectFileBreakpad(module_sp, data_sp, data_offset, file,
file_offset, length, std::move(header->arch),
std::move(header->uuid));
}
ObjectFile *ObjectFileBreakpad::CreateMemoryInstance(
const ModuleSP &module_sp, DataBufferSP &data_sp,
const ProcessSP &process_sp, addr_t header_addr) {
return nullptr;
}
size_t ObjectFileBreakpad::GetModuleSpecifications(
const FileSpec &file, DataBufferSP &data_sp, offset_t data_offset,
offset_t file_offset, offset_t length, ModuleSpecList &specs) {
auto text = toStringRef(data_sp->GetData());
llvm::Optional<Header> header = Header::parse(text);
if (!header)
return 0;
ModuleSpec spec(file, std::move(header->arch));
spec.GetUUID() = std::move(header->uuid);
specs.Append(spec);
return 1;
}
ObjectFileBreakpad::ObjectFileBreakpad(const ModuleSP &module_sp,
DataBufferSP &data_sp,
offset_t data_offset,
const FileSpec *file, offset_t offset,
offset_t length, ArchSpec arch,
UUID uuid)
: ObjectFile(module_sp, file, offset, length, data_sp, data_offset),
m_arch(std::move(arch)), m_uuid(std::move(uuid)) {}
bool ObjectFileBreakpad::ParseHeader() {
// We already parsed the header during initialization.
return true;
}
Symtab *ObjectFileBreakpad::GetSymtab() {
// TODO
return nullptr;
}
void ObjectFileBreakpad::CreateSections(SectionList &unified_section_list) {
if (m_sections_up)
return;
m_sections_up = std::make_unique<SectionList>();
llvm::Optional<Record::Kind> current_section;
offset_t section_start;
llvm::StringRef text = toStringRef(m_data.GetData());
uint32_t next_section_id = 1;
auto maybe_add_section = [&](const uint8_t *end_ptr) {
if (!current_section)
return; // We have been called before parsing the first line.
offset_t end_offset = end_ptr - m_data.GetDataStart();
auto section_sp = std::make_shared<Section>(
GetModule(), this, next_section_id++,
ConstString(toString(*current_section)), eSectionTypeOther,
/*file_vm_addr*/ 0, /*vm_size*/ 0, section_start,
end_offset - section_start, /*log2align*/ 0, /*flags*/ 0);
m_sections_up->AddSection(section_sp);
unified_section_list.AddSection(section_sp);
};
while (!text.empty()) {
llvm::StringRef line;
std::tie(line, text) = text.split('\n');
llvm::Optional<Record::Kind> next_section = Record::classify(line);
if (next_section == Record::Line) {
// Line records logically belong to the preceding Func record, so we put
// them in the same section.
next_section = Record::Func;
}
if (next_section == current_section)
continue;
// Changing sections, finish off the previous one, if there was any.
maybe_add_section(line.bytes_begin());
// And start a new one.
current_section = next_section;
section_start = line.bytes_begin() - m_data.GetDataStart();
}
// Finally, add the last section.
maybe_add_section(m_data.GetDataEnd());
}
|
