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|
//===-- SymbolTest.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/Mach-O/ObjectFileMachO.h"
#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
#include "TestingSupport/SubsystemRAII.h"
#include "TestingSupport/TestUtilities.h"
#include "lldb/Core/DataFileCache.h"
#include "lldb/Core/Module.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/Symtab.h"
#include "lldb/Utility/DataEncoder.h"
#include "lldb/Utility/DataExtractor.h"
#include <memory>
#include "gtest/gtest.h"
using namespace lldb;
using namespace lldb_private;
class SymtabTest : public testing::Test {
SubsystemRAII<FileSystem, HostInfo, ObjectFileMachO, SymbolFileDWARF,
TypeSystemClang>
subsystem;
};
static void EncodeDecode(const Symtab &object, ByteOrder byte_order) {
const uint8_t addr_size = 8;
DataEncoder file(byte_order, addr_size);
object.Encode(file);
llvm::ArrayRef<uint8_t> bytes = file.GetData();
DataExtractor data(bytes.data(), bytes.size(), byte_order, addr_size);
Symtab decoded_object(object.GetObjectFile());
offset_t data_offset = 0;
bool uuid_mismatch = false;
decoded_object.Decode(data, &data_offset, uuid_mismatch);
ASSERT_EQ(object.GetNumSymbols(), decoded_object.GetNumSymbols());
for (size_t i = 0; i < object.GetNumSymbols(); ++i)
EXPECT_EQ(*object.SymbolAtIndex(i), *decoded_object.SymbolAtIndex(i));
}
static void EncodeDecode(const Symtab &object) {
EncodeDecode(object, eByteOrderLittle);
EncodeDecode(object, eByteOrderBig);
}
TEST_F(SymtabTest, EncodeDecodeSymtab) {
auto ExpectedFile = TestFile::fromYaml(R"(
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x100000C
cpusubtype: 0x0
filetype: 0x2
ncmds: 17
sizeofcmds: 792
flags: 0x200085
reserved: 0x0
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __PAGEZERO
vmaddr: 0
vmsize: 4294967296
fileoff: 0
filesize: 0
maxprot: 0
initprot: 0
nsects: 0
flags: 0
- cmd: LC_SEGMENT_64
cmdsize: 232
segname: __TEXT
vmaddr: 4294967296
vmsize: 16384
fileoff: 0
filesize: 16384
maxprot: 5
initprot: 5
nsects: 2
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x100003F94
size: 36
offset: 0x3F94
align: 2
reloff: 0x0
nreloc: 0
flags: 0x80000400
reserved1: 0x0
reserved2: 0x0
reserved3: 0x0
content: FF8300D1E80300AA00008052FF1F00B9E81B00B9E10B00F9E20700F9FF830091C0035FD6
- sectname: __unwind_info
segname: __TEXT
addr: 0x100003FB8
size: 72
offset: 0x3FB8
align: 2
reloff: 0x0
nreloc: 0
flags: 0x0
reserved1: 0x0
reserved2: 0x0
reserved3: 0x0
content: 010000001C000000000000001C000000000000001C00000002000000943F00003400000034000000B93F00000000000034000000030000000C000100100001000000000000200002
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __LINKEDIT
vmaddr: 4294983680
vmsize: 16384
fileoff: 16384
filesize: 674
maxprot: 1
initprot: 1
nsects: 0
flags: 0
- cmd: LC_DYLD_CHAINED_FIXUPS
cmdsize: 16
dataoff: 16384
datasize: 56
- cmd: LC_DYLD_EXPORTS_TRIE
cmdsize: 16
dataoff: 16440
datasize: 48
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 16496
nsyms: 10
stroff: 16656
strsize: 128
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 8
iextdefsym: 8
nextdefsym: 2
iundefsym: 10
nundefsym: 0
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
- cmd: LC_LOAD_DYLINKER
cmdsize: 32
name: 12
Content: '/usr/lib/dyld'
ZeroPadBytes: 7
- cmd: LC_UUID
cmdsize: 24
uuid: 1EECD2B8-16EA-3FEC-AB3C-F46139DBD0E2
- cmd: LC_BUILD_VERSION
cmdsize: 32
platform: 1
minos: 786432
sdk: 786432
ntools: 1
Tools:
- tool: 3
version: 46596096
- cmd: LC_SOURCE_VERSION
cmdsize: 16
version: 0
- cmd: LC_MAIN
cmdsize: 24
entryoff: 16276
stacksize: 0
- cmd: LC_LOAD_DYLIB
cmdsize: 48
dylib:
name: 24
timestamp: 2
current_version: 78643968
compatibility_version: 65536
Content: '/usr/lib/libc++.1.dylib'
ZeroPadBytes: 1
- cmd: LC_LOAD_DYLIB
cmdsize: 56
dylib:
name: 24
timestamp: 2
current_version: 85917696
compatibility_version: 65536
Content: '/usr/lib/libSystem.B.dylib'
ZeroPadBytes: 6
- cmd: LC_FUNCTION_STARTS
cmdsize: 16
dataoff: 16488
datasize: 8
- cmd: LC_DATA_IN_CODE
cmdsize: 16
dataoff: 16496
datasize: 0
- cmd: LC_CODE_SIGNATURE
cmdsize: 16
dataoff: 16784
datasize: 274
LinkEditData:
NameList:
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n_type: 0x64
n_sect: 0
n_desc: 0
n_value: 0
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n_type: 0x64
n_sect: 0
n_desc: 0
n_value: 0
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n_type: 0x66
n_sect: 0
n_desc: 1
n_value: 1639532873
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n_type: 0x2E
n_sect: 1
n_desc: 0
n_value: 4294983572
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n_type: 0x24
n_sect: 1
n_desc: 0
n_value: 4294983572
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n_type: 0x24
n_sect: 0
n_desc: 0
n_value: 36
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n_type: 0x4E
n_sect: 1
n_desc: 0
n_value: 36
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n_type: 0x64
n_sect: 1
n_desc: 0
n_value: 0
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n_type: 0xF
n_sect: 1
n_desc: 16
n_value: 4294967296
- n_strx: 22
n_type: 0xF
n_sect: 1
n_desc: 0
n_value: 4294983572
StringTable:
- ' '
- __mh_execute_header
- _main
- '/Users/gclayton/Documents/src/args/'
- main.cpp
- '/Users/gclayton/Documents/src/args/main.o'
- _main
- ''
- ''
- ''
- ''
- ''
- ''
- ''
...
)");
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
ObjectFile *objfile = module_sp->GetObjectFile();
ASSERT_NE(objfile, nullptr);
// Test encoding and decoding an empty symbol table.
Symtab symtab(objfile);
symtab.PreloadSymbols();
EncodeDecode(symtab);
// Now encode and decode an actual symbol table from our yaml.
Symtab *module_symtab = module_sp->GetSymtab();
ASSERT_NE(module_symtab, nullptr);
module_symtab->PreloadSymbols();
EncodeDecode(*module_symtab);
}
TEST_F(SymtabTest, TestDecodeCStringMaps) {
// Symbol tables save out the symbols, but they also save out the symbol table
// name indexes. These name indexes are a map of sorted ConstString + T pairs
// and when they are decoded from a file, they are no longer sorted since
// ConstString objects can be sorted by "const char *" and the order in which
// these strings are created won't be the same in a new process. We need to
// ensure these name lookups happen correctly when we load the name indexes,
// so this test loads a symbol table from a cache file from
// "lldb/unittests/Symbol/Inputs/indexnames-symtab-cache" and make sure we
// can correctly lookup each of the names in the symbol table.
auto ExpectedFile = TestFile::fromYaml(R"(
--- !mach-o
FileHeader:
magic: 0xFEEDFACF
cputype: 0x100000C
cpusubtype: 0x0
filetype: 0x2
ncmds: 16
sizeofcmds: 744
flags: 0x200085
reserved: 0x0
LoadCommands:
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __PAGEZERO
vmaddr: 0
vmsize: 4294967296
fileoff: 0
filesize: 0
maxprot: 0
initprot: 0
nsects: 0
flags: 0
- cmd: LC_SEGMENT_64
cmdsize: 232
segname: __TEXT
vmaddr: 4294967296
vmsize: 16384
fileoff: 0
filesize: 16384
maxprot: 5
initprot: 5
nsects: 2
flags: 0
Sections:
- sectname: __text
segname: __TEXT
addr: 0x100003F64
size: 76
offset: 0x3F64
align: 2
reloff: 0x0
nreloc: 0
flags: 0x80000400
reserved1: 0x0
reserved2: 0x0
reserved3: 0x0
content: 80018052C0035FD6E0028052C0035FD640048052C0035FD6FF8300D1FD7B01A9FD43009108008052E80B00B9BFC31FB8F4FFFF97F5FFFF97F6FFFF97E00B40B9FD7B41A9FF830091C0035FD6
- sectname: __unwind_info
segname: __TEXT
addr: 0x100003FB0
size: 80
offset: 0x3FB0
align: 2
reloff: 0x0
nreloc: 0
flags: 0x0
reserved1: 0x0
reserved2: 0x0
reserved3: 0x0
content: 010000001C000000000000001C000000000000001C00000002000000643F00003400000034000000B13F00000000000034000000030000000C0002001400020000000001180000000000000400000002
- cmd: LC_SEGMENT_64
cmdsize: 72
segname: __LINKEDIT
vmaddr: 4294983680
vmsize: 16384
fileoff: 16384
filesize: 994
maxprot: 1
initprot: 1
nsects: 0
flags: 0
- cmd: LC_DYLD_CHAINED_FIXUPS
cmdsize: 16
dataoff: 16384
datasize: 56
- cmd: LC_DYLD_EXPORTS_TRIE
cmdsize: 16
dataoff: 16440
datasize: 80
- cmd: LC_SYMTAB
cmdsize: 24
symoff: 16528
nsyms: 25
stroff: 16928
strsize: 176
- cmd: LC_DYSYMTAB
cmdsize: 80
ilocalsym: 0
nlocalsym: 20
iextdefsym: 20
nextdefsym: 5
iundefsym: 25
nundefsym: 0
tocoff: 0
ntoc: 0
modtaboff: 0
nmodtab: 0
extrefsymoff: 0
nextrefsyms: 0
indirectsymoff: 0
nindirectsyms: 0
extreloff: 0
nextrel: 0
locreloff: 0
nlocrel: 0
- cmd: LC_LOAD_DYLINKER
cmdsize: 32
name: 12
Content: '/usr/lib/dyld'
ZeroPadBytes: 7
- cmd: LC_UUID
cmdsize: 24
uuid: 3E94866E-0D1A-39BD-975B-64E8F1FDBAAE
- cmd: LC_BUILD_VERSION
cmdsize: 32
platform: 1
minos: 786432
sdk: 787200
ntools: 1
Tools:
- tool: 3
version: 49938432
- cmd: LC_SOURCE_VERSION
cmdsize: 16
version: 0
- cmd: LC_MAIN
cmdsize: 24
entryoff: 16252
stacksize: 0
- cmd: LC_LOAD_DYLIB
cmdsize: 56
dylib:
name: 24
timestamp: 2
current_version: 85943299
compatibility_version: 65536
Content: '/usr/lib/libSystem.B.dylib'
ZeroPadBytes: 6
- cmd: LC_FUNCTION_STARTS
cmdsize: 16
dataoff: 16520
datasize: 8
- cmd: LC_DATA_IN_CODE
cmdsize: 16
dataoff: 16528
datasize: 0
- cmd: LC_CODE_SIGNATURE
cmdsize: 16
dataoff: 17104
datasize: 274
LinkEditData:
NameList:
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n_type: 0x64
n_sect: 0
n_desc: 0
n_value: 0
- n_strx: 91
n_type: 0x64
n_sect: 0
n_desc: 0
n_value: 0
- n_strx: 98
n_type: 0x66
n_sect: 0
n_desc: 1
n_value: 1651098491
- n_strx: 1
n_type: 0x2E
n_sect: 1
n_desc: 0
n_value: 4294983524
- n_strx: 152
n_type: 0x24
n_sect: 1
n_desc: 0
n_value: 4294983524
- n_strx: 1
n_type: 0x24
n_sect: 0
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x4E
n_sect: 1
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x2E
n_sect: 1
n_desc: 0
n_value: 4294983532
- n_strx: 157
n_type: 0x24
n_sect: 1
n_desc: 0
n_value: 4294983532
- n_strx: 1
n_type: 0x24
n_sect: 0
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x4E
n_sect: 1
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x2E
n_sect: 1
n_desc: 0
n_value: 4294983540
- n_strx: 162
n_type: 0x24
n_sect: 1
n_desc: 0
n_value: 4294983540
- n_strx: 1
n_type: 0x24
n_sect: 0
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x4E
n_sect: 1
n_desc: 0
n_value: 8
- n_strx: 1
n_type: 0x2E
n_sect: 1
n_desc: 0
n_value: 4294983548
- n_strx: 167
n_type: 0x24
n_sect: 1
n_desc: 0
n_value: 4294983548
- n_strx: 1
n_type: 0x24
n_sect: 0
n_desc: 0
n_value: 52
- n_strx: 1
n_type: 0x4E
n_sect: 1
n_desc: 0
n_value: 52
- n_strx: 1
n_type: 0x64
n_sect: 1
n_desc: 0
n_value: 0
- n_strx: 2
n_type: 0xF
n_sect: 1
n_desc: 16
n_value: 4294967296
- n_strx: 22
n_type: 0xF
n_sect: 1
n_desc: 0
n_value: 4294983532
- n_strx: 27
n_type: 0xF
n_sect: 1
n_desc: 0
n_value: 4294983540
- n_strx: 32
n_type: 0xF
n_sect: 1
n_desc: 0
n_value: 4294983524
- n_strx: 37
n_type: 0xF
n_sect: 1
n_desc: 0
n_value: 4294983548
StringTable:
- ' '
- __mh_execute_header
- _bar
- _baz
- _foo
- _main
- '/Users/gclayton/Documents/objfiles/index-names/'
- main.c
- '/Users/gclayton/Documents/objfiles/index-names/main.o'
- _foo
- _bar
- _baz
- _main
- ''
- ''
- ''
FunctionStarts: [ 0x3F64, 0x3F6C, 0x3F74, 0x3F7C ]
...
)");
// This data was taken from a hex dump of the object file from the above yaml
// and hexdumped so we can load the cache data in this test.
const uint8_t symtab_cache_bytes[] = {
0x01, 0x10, 0x3e, 0x94, 0x86, 0x6e, 0x0d, 0x1a,
0x39, 0xbd, 0x97, 0x5b, 0x64, 0xe8, 0xf1, 0xfd,
0xba, 0xae, 0xff, 0x53, 0x54, 0x41, 0x42, 0x91,
0x00, 0x00, 0x00, 0x00, 0x2f, 0x55, 0x73, 0x65,
0x72, 0x73, 0x2f, 0x67, 0x63, 0x6c, 0x61, 0x79,
0x74, 0x6f, 0x6e, 0x2f, 0x44, 0x6f, 0x63, 0x75,
0x6d, 0x65, 0x6e, 0x74, 0x73, 0x2f, 0x6f, 0x62,
0x6a, 0x66, 0x69, 0x6c, 0x65, 0x73, 0x2f, 0x69,
0x6e, 0x64, 0x65, 0x78, 0x2d, 0x6e, 0x61, 0x6d,
0x65, 0x73, 0x2f, 0x6d, 0x61, 0x69, 0x6e, 0x2e,
0x63, 0x00, 0x2f, 0x55, 0x73, 0x65, 0x72, 0x73,
0x2f, 0x67, 0x63, 0x6c, 0x61, 0x79, 0x74, 0x6f,
0x6e, 0x2f, 0x44, 0x6f, 0x63, 0x75, 0x6d, 0x65,
0x6e, 0x74, 0x73, 0x2f, 0x6f, 0x62, 0x6a, 0x66,
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0x63, 0x75, 0x74, 0x65, 0x5f, 0x68, 0x65, 0x61,
0x64, 0x65, 0x72, 0x00, 0x53, 0x59, 0x4d, 0x42,
0x01, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
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0x0a, 0x20, 0x01, 0x37, 0x00, 0x00, 0x00, 0x00,
0x7b, 0xc3, 0x69, 0x62, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x01, 0x00, 0x66, 0x00, 0x04, 0x00, 0x00, 0x00,
0x00, 0x00, 0x02, 0x32, 0x01, 0x6d, 0x00, 0x00,
0x00, 0x01, 0x64, 0x3f, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x08, 0x00,
0x00, 0x00, 0x00, 0x00, 0x02, 0x32, 0x01, 0x71,
0x00, 0x00, 0x00, 0x01, 0x6c, 0x3f, 0x00, 0x00,
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0x02, 0x32, 0x01, 0x79, 0x00, 0x00, 0x00, 0x01,
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0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00,
0x00, 0x00, 0x64, 0x3f, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x10, 0x00, 0x0f, 0x00, 0x01, 0x00,
0x43, 0x4d, 0x41, 0x50, 0x07, 0x00, 0x00, 0x00,
0x6d, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00,
0x75, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00,
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x79, 0x00, 0x00, 0x00, 0x05, 0x00, 0x00, 0x00,
0x37, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0x71, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00,
0x7e, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00
};
ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
ObjectFile *objfile = module_sp->GetObjectFile();
ASSERT_NE(objfile, nullptr);
// Test encoding and decoding an empty symbol table.
DataExtractor data(symtab_cache_bytes, sizeof(symtab_cache_bytes),
eByteOrderLittle, 8);
Symtab symtab(objfile);
offset_t data_offset = 0;
bool uuid_mismatch = false; // Gets set to true if signature doesn't match.
const bool success = symtab.Decode(data, &data_offset, uuid_mismatch);
ASSERT_EQ(success, true);
ASSERT_EQ(uuid_mismatch, false);
// Now make sure that name lookup works for all symbols. This indicates that
// the Symtab::NameToIndexMap was decoded correctly and works as expected.
Symbol *symbol = nullptr;
symbol = symtab.FindFirstSymbolWithNameAndType(ConstString("main"),
eSymbolTypeCode,
Symtab::eDebugAny,
Symtab::eVisibilityAny);
ASSERT_NE(symbol, nullptr);
symbol = symtab.FindFirstSymbolWithNameAndType(ConstString("foo"),
eSymbolTypeCode,
Symtab::eDebugAny,
Symtab::eVisibilityAny);
ASSERT_NE(symbol, nullptr);
symbol = symtab.FindFirstSymbolWithNameAndType(ConstString("bar"),
eSymbolTypeCode,
Symtab::eDebugAny,
Symtab::eVisibilityAny);
ASSERT_NE(symbol, nullptr);
symbol = symtab.FindFirstSymbolWithNameAndType(ConstString("baz"),
eSymbolTypeCode,
Symtab::eDebugAny,
Symtab::eVisibilityAny);
ASSERT_NE(symbol, nullptr);
}
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