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
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
|
//===-- TestObjectFileELF.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/ELF/ObjectFileELF.h"
#include "Plugins/SymbolFile/Symtab/SymbolFileSymtab.h"
#include "TestingSupport/SubsystemRAII.h"
#include "TestingSupport/TestUtilities.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/Section.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "llvm/Support/Compression.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace lldb_private;
using namespace lldb;
class ObjectFileELFTest : public testing::Test {
SubsystemRAII<FileSystem, HostInfo, ObjectFileELF, SymbolFileSymtab>
subsystems;
};
TEST_F(ObjectFileELFTest, SectionsResolveConsistently) {
auto ExpectedFile = TestFile::fromYaml(R"(
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_X86_64
Entry: 0x0000000000400180
Sections:
- Name: .note.gnu.build-id
Type: SHT_NOTE
Flags: [ SHF_ALLOC ]
Address: 0x0000000000400158
AddressAlign: 0x0000000000000004
Content: 040000001400000003000000474E55003F3EC29E3FD83E49D18C4D49CD8A730CC13117B6
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x0000000000400180
AddressAlign: 0x0000000000000010
Content: 554889E58B042500106000890425041060005DC3
- Name: .data
Type: SHT_PROGBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000601000
AddressAlign: 0x0000000000000004
Content: 2F000000
- Name: .bss
Type: SHT_NOBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000601004
AddressAlign: 0x0000000000000004
Size: 0x0000000000000004
Symbols:
- Name: Y
Type: STT_OBJECT
Section: .data
Value: 0x0000000000601000
Size: 0x0000000000000004
Binding: STB_GLOBAL
- Name: _start
Type: STT_FUNC
Section: .text
Value: 0x0000000000400180
Size: 0x0000000000000014
Binding: STB_GLOBAL
- Name: X
Type: STT_OBJECT
Section: .bss
Value: 0x0000000000601004
Size: 0x0000000000000004
Binding: STB_GLOBAL
...
)");
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
SectionList *list = module_sp->GetSectionList();
ASSERT_NE(nullptr, list);
auto bss_sp = list->FindSectionByName(ConstString(".bss"));
ASSERT_NE(nullptr, bss_sp);
auto data_sp = list->FindSectionByName(ConstString(".data"));
ASSERT_NE(nullptr, data_sp);
auto text_sp = list->FindSectionByName(ConstString(".text"));
ASSERT_NE(nullptr, text_sp);
const Symbol *X = module_sp->FindFirstSymbolWithNameAndType(ConstString("X"),
eSymbolTypeAny);
ASSERT_NE(nullptr, X);
EXPECT_EQ(bss_sp, X->GetAddress().GetSection());
const Symbol *Y = module_sp->FindFirstSymbolWithNameAndType(ConstString("Y"),
eSymbolTypeAny);
ASSERT_NE(nullptr, Y);
EXPECT_EQ(data_sp, Y->GetAddress().GetSection());
const Symbol *start = module_sp->FindFirstSymbolWithNameAndType(
ConstString("_start"), eSymbolTypeAny);
ASSERT_NE(nullptr, start);
EXPECT_EQ(text_sp, start->GetAddress().GetSection());
}
// Test that GetModuleSpecifications works on an "atypical" object file which
// has section headers right after the ELF header (instead of the more common
// layout where the section headers are at the very end of the object file).
//
// Test file generated with yaml2obj (@svn rev 324254) from the following input:
/*
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_X86_64
Entry: 0x00000000004003D0
Sections:
- Name: .note.gnu.build-id
Type: SHT_NOTE
Flags: [ SHF_ALLOC ]
Address: 0x0000000000400274
AddressAlign: 0x0000000000000004
Content: 040000001400000003000000474E55001B8A73AC238390E32A7FF4AC8EBE4D6A41ECF5C9
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x00000000004003D0
AddressAlign: 0x0000000000000010
Content: DEADBEEFBAADF00D
...
*/
TEST_F(ObjectFileELFTest, GetModuleSpecifications_EarlySectionHeaders) {
std::string SO = GetInputFilePath("early-section-headers.so");
ModuleSpecList Specs;
ASSERT_EQ(1u, ObjectFile::GetModuleSpecifications(FileSpec(SO), 0, 0, Specs));
ModuleSpec Spec;
ASSERT_TRUE(Specs.GetModuleSpecAtIndex(0, Spec)) ;
UUID Uuid;
Uuid.SetFromStringRef("1b8a73ac238390e32a7ff4ac8ebe4d6a41ecf5c9");
EXPECT_EQ(Spec.GetUUID(), Uuid);
}
TEST_F(ObjectFileELFTest, GetModuleSpecifications_OffsetSizeWithNormalFile) {
std::string SO = GetInputFilePath("liboffset-test.so");
ModuleSpecList Specs;
ASSERT_EQ(1u, ObjectFile::GetModuleSpecifications(FileSpec(SO), 0, 0, Specs));
ModuleSpec Spec;
ASSERT_TRUE(Specs.GetModuleSpecAtIndex(0, Spec)) ;
UUID Uuid;
Uuid.SetFromStringRef("7D6E4738");
EXPECT_EQ(Spec.GetUUID(), Uuid);
EXPECT_EQ(Spec.GetObjectOffset(), 0UL);
EXPECT_EQ(Spec.GetObjectSize(), 3600UL);
EXPECT_EQ(FileSystem::Instance().GetByteSize(FileSpec(SO)), 3600UL);
}
TEST_F(ObjectFileELFTest, GetModuleSpecifications_OffsetSizeWithOffsetFile) {
// The contents of offset-test.bin are
// - 0-1023: \0
// - 1024-4623: liboffset-test.so (offset: 1024, size: 3600, CRC32: 7D6E4738)
// - 4624-4639: \0
std::string SO = GetInputFilePath("offset-test.bin");
ModuleSpecList Specs;
ASSERT_EQ(
1u, ObjectFile::GetModuleSpecifications(FileSpec(SO), 1024, 3600, Specs));
ModuleSpec Spec;
ASSERT_TRUE(Specs.GetModuleSpecAtIndex(0, Spec)) ;
UUID Uuid;
Uuid.SetFromStringRef("7D6E4738");
EXPECT_EQ(Spec.GetUUID(), Uuid);
EXPECT_EQ(Spec.GetObjectOffset(), 1024UL);
EXPECT_EQ(Spec.GetObjectSize(), 3600UL);
EXPECT_EQ(FileSystem::Instance().GetByteSize(FileSpec(SO)), 4640UL);
}
TEST_F(ObjectFileELFTest, GetSymtab_NoSymEntryPointArmThumbAddressClass) {
/*
// nosym-entrypoint-arm-thumb.s
.thumb_func
_start:
mov r0, #42
mov r7, #1
svc #0
// arm-linux-androideabi-as nosym-entrypoint-arm-thumb.s
// -o nosym-entrypoint-arm-thumb.o
// arm-linux-androideabi-ld nosym-entrypoint-arm-thumb.o
// -o nosym-entrypoint-arm-thumb -e 0x8075 -s
*/
auto ExpectedFile = TestFile::fromYaml(R"(
--- !ELF
FileHeader:
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_ARM
Flags: [ EF_ARM_SOFT_FLOAT, EF_ARM_EABI_VER5 ]
Entry: 0x0000000000008075
Sections:
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x0000000000008074
AddressAlign: 0x0000000000000002
Content: 2A20012700DF
- Name: .data
Type: SHT_PROGBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000009000
AddressAlign: 0x0000000000000001
Content: ''
- Name: .bss
Type: SHT_NOBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000009000
AddressAlign: 0x0000000000000001
- Name: .note.gnu.gold-version
Type: SHT_NOTE
AddressAlign: 0x0000000000000004
Content: 040000000900000004000000474E5500676F6C6420312E3131000000
- Name: .ARM.attributes
Type: SHT_ARM_ATTRIBUTES
AddressAlign: 0x0000000000000001
Content: '4113000000616561626900010900000006020901'
...
)");
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
auto entry_point_addr = module_sp->GetObjectFile()->GetEntryPointAddress();
ASSERT_TRUE(entry_point_addr.GetOffset() & 1);
// Decrease the offsite by 1 to make it into a breakable address since this
// is Thumb.
entry_point_addr.SetOffset(entry_point_addr.GetOffset() - 1);
ASSERT_EQ(entry_point_addr.GetAddressClass(),
AddressClass::eCodeAlternateISA);
}
TEST_F(ObjectFileELFTest, GetSymtab_NoSymEntryPointArmAddressClass) {
/*
// nosym-entrypoint-arm.s
_start:
movs r0, #42
movs r7, #1
svc #0
// arm-linux-androideabi-as nosym-entrypoint-arm.s
// -o nosym-entrypoint-arm.o
// arm-linux-androideabi-ld nosym-entrypoint-arm.o
// -o nosym-entrypoint-arm -e 0x8074 -s
*/
auto ExpectedFile = TestFile::fromYaml(R"(
--- !ELF
FileHeader:
Class: ELFCLASS32
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_ARM
Flags: [ EF_ARM_SOFT_FLOAT, EF_ARM_EABI_VER5 ]
Entry: 0x0000000000008074
Sections:
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x0000000000008074
AddressAlign: 0x0000000000000004
Content: 2A00A0E30170A0E3000000EF
- Name: .data
Type: SHT_PROGBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000009000
AddressAlign: 0x0000000000000001
Content: ''
- Name: .bss
Type: SHT_NOBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000009000
AddressAlign: 0x0000000000000001
- Name: .note.gnu.gold-version
Type: SHT_NOTE
AddressAlign: 0x0000000000000004
Content: 040000000900000004000000474E5500676F6C6420312E3131000000
- Name: .ARM.attributes
Type: SHT_ARM_ATTRIBUTES
AddressAlign: 0x0000000000000001
Content: '4113000000616561626900010900000006010801'
...
)");
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
auto entry_point_addr = module_sp->GetObjectFile()->GetEntryPointAddress();
ASSERT_EQ(entry_point_addr.GetAddressClass(), AddressClass::eCode);
}
TEST_F(ObjectFileELFTest, SkipsLocalMappingAndDotLSymbols) {
auto ExpectedFile = TestFile::fromYaml(R"(
--- !ELF
FileHeader:
Class: ELFCLASS64
Data: ELFDATA2LSB
Type: ET_EXEC
Machine: EM_RISCV
Flags: [ EF_RISCV_RVC, EF_RISCV_FLOAT_ABI_SINGLE ]
Entry: 0xC0A1B010
Sections:
- Name: .text
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
Address: 0x0000000000400180
AddressAlign: 0x0000000000000010
Content: 554889E5
- Name: .data
Type: SHT_PROGBITS
Flags: [ SHF_WRITE, SHF_ALLOC ]
Address: 0x0000000000601000
AddressAlign: 0x0000000000000004
Content: 2F000000
- Name: .riscv.attributes
Type: SHT_PROGBITS
Flags: [ SHF_ALLOC ]
Address: 0x0000000000610000
AddressAlign: 0x0000000000000004
Content: "00"
Symbols:
- Name: $d
Type: STT_NOTYPE
Section: .riscv.attributes
Value: 0x0000000000400180
Size: 0x10
Binding: STB_LOCAL
- Name: $x
Type: STT_NOTYPE
Section: .text
Value: 0xC0A1B010
Size: 0x10
Binding: STB_LOCAL
- Name: .Lfoo
Type: STT_OBJECT
Section: .data
Value: 0x0000000000601000
Size: 0x4
Binding: STB_LOCAL
- Name: global_func
Type: STT_FUNC
Section: .text
Value: 0x00000000004001A0
Size: 0x10
Binding: STB_GLOBAL
- Name: global_obj
Type: STT_OBJECT
Section: .data
Value: 0x0000000000601004
Size: 0x4
Binding: STB_GLOBAL
...
)");
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
auto *symtab = module_sp->GetSymtab();
ASSERT_NE(nullptr, symtab);
EXPECT_EQ(nullptr, module_sp->FindFirstSymbolWithNameAndType(
ConstString("$d"), eSymbolTypeAny));
EXPECT_EQ(nullptr, module_sp->FindFirstSymbolWithNameAndType(
ConstString("$x"), eSymbolTypeAny));
EXPECT_EQ(nullptr, module_sp->FindFirstSymbolWithNameAndType(
ConstString(".Lfoo"), eSymbolTypeAny));
// assert that other symbols are present
const Symbol *global_func = module_sp->FindFirstSymbolWithNameAndType(
ConstString("global_func"), eSymbolTypeAny);
ASSERT_NE(nullptr, global_func);
const Symbol *global_obj = module_sp->FindFirstSymbolWithNameAndType(
ConstString("global_obj"), eSymbolTypeAny);
ASSERT_NE(nullptr, global_obj);
}
|
