forked from OSchip/llvm-project
720 lines
22 KiB
C++
720 lines
22 KiB
C++
//===-- SymbolTest.cpp ----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Plugins/ObjectFile/Mach-O/ObjectFileMachO.h"
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#include "Plugins/SymbolFile/DWARF/SymbolFileDWARF.h"
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#include "Plugins/TypeSystem/Clang/TypeSystemClang.h"
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#include "TestingSupport/SubsystemRAII.h"
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#include "TestingSupport/TestUtilities.h"
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#include "lldb/Core/DataFileCache.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Host/FileSystem.h"
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#include "lldb/Host/HostInfo.h"
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#include "lldb/Symbol/Symbol.h"
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#include "lldb/Symbol/Symtab.h"
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#include "lldb/Utility/DataEncoder.h"
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#include "lldb/Utility/DataExtractor.h"
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#include <memory>
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#include "gtest/gtest.h"
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using namespace lldb;
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using namespace lldb_private;
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class SymtabTest : public testing::Test {
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SubsystemRAII<FileSystem, HostInfo, ObjectFileMachO, SymbolFileDWARF,
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TypeSystemClang>
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subsystem;
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};
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static void EncodeDecode(const Symtab &object, ByteOrder byte_order) {
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const uint8_t addr_size = 8;
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DataEncoder file(byte_order, addr_size);
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object.Encode(file);
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llvm::ArrayRef<uint8_t> bytes = file.GetData();
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DataExtractor data(bytes.data(), bytes.size(), byte_order, addr_size);
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Symtab decoded_object(object.GetObjectFile());
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offset_t data_offset = 0;
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bool uuid_mismatch = false;
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decoded_object.Decode(data, &data_offset, uuid_mismatch);
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ASSERT_EQ(object.GetNumSymbols(), decoded_object.GetNumSymbols());
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for (size_t i = 0; i < object.GetNumSymbols(); ++i)
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EXPECT_EQ(*object.SymbolAtIndex(i), *decoded_object.SymbolAtIndex(i));
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}
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static void EncodeDecode(const Symtab &object) {
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EncodeDecode(object, eByteOrderLittle);
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EncodeDecode(object, eByteOrderBig);
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}
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TEST_F(SymtabTest, EncodeDecodeSymtab) {
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auto ExpectedFile = TestFile::fromYaml(R"(
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--- !mach-o
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FileHeader:
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magic: 0xFEEDFACF
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cputype: 0x100000C
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cpusubtype: 0x0
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filetype: 0x2
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ncmds: 17
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sizeofcmds: 792
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flags: 0x200085
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reserved: 0x0
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LoadCommands:
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- cmd: LC_SEGMENT_64
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cmdsize: 72
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segname: __PAGEZERO
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vmaddr: 0
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vmsize: 4294967296
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vmsize: 16384
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flags: 0
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content: FF8300D1E80300AA00008052FF1F00B9E81B00B9E10B00F9E20700F9FF830091C0035FD6
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content: 010000001C000000000000001C000000000000001C00000002000000943F00003400000034000000B93F00000000000034000000030000000C000100100001000000000000200002
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segname: __LINKEDIT
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vmaddr: 4294983680
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vmsize: 16384
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filesize: 674
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maxprot: 1
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nsects: 0
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datasize: 56
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- cmd: LC_DYLD_EXPORTS_TRIE
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cmdsize: 16
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dataoff: 16440
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datasize: 48
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cmdsize: 24
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symoff: 16496
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nsyms: 10
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stroff: 16656
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strsize: 128
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ilocalsym: 0
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ZeroPadBytes: 7
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cmdsize: 24
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uuid: 1EECD2B8-16EA-3FEC-AB3C-F46139DBD0E2
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cmdsize: 32
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platform: 1
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minos: 786432
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sdk: 786432
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ntools: 1
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Tools:
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- tool: 3
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version: 46596096
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- cmd: LC_SOURCE_VERSION
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cmdsize: 16
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version: 0
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- cmd: LC_MAIN
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cmdsize: 24
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entryoff: 16276
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stacksize: 0
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- cmd: LC_LOAD_DYLIB
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cmdsize: 48
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dylib:
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name: 24
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timestamp: 2
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current_version: 78643968
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compatibility_version: 65536
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Content: '/usr/lib/libc++.1.dylib'
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ZeroPadBytes: 1
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- cmd: LC_LOAD_DYLIB
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cmdsize: 56
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dylib:
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name: 24
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timestamp: 2
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current_version: 85917696
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compatibility_version: 65536
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Content: '/usr/lib/libSystem.B.dylib'
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ZeroPadBytes: 6
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dataoff: 16488
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datasize: 8
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cmdsize: 16
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datasize: 0
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LinkEditData:
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StringTable:
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- ' '
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- __mh_execute_header
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- _main
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- '/Users/gclayton/Documents/src/args/'
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- main.cpp
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- '/Users/gclayton/Documents/src/args/main.o'
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- _main
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- ''
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- ''
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- ''
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- ''
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- ''
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- ''
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- ''
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...
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)");
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ASSERT_THAT_EXPECTED(ExpectedFile, llvm::Succeeded());
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auto module_sp = std::make_shared<Module>(ExpectedFile->moduleSpec());
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ObjectFile *objfile = module_sp->GetObjectFile();
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ASSERT_NE(objfile, nullptr);
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// Test encoding and decoding an empty symbol table.
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Symtab symtab(objfile);
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symtab.PreloadSymbols();
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EncodeDecode(symtab);
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// Now encode and decode an actual symbol table from our yaml.
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Symtab *module_symtab = module_sp->GetSymtab();
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ASSERT_NE(module_symtab, nullptr);
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module_symtab->PreloadSymbols();
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EncodeDecode(*module_symtab);
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}
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TEST_F(SymtabTest, TestDecodeCStringMaps) {
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// Symbol tables save out the symbols, but they also save out the symbol table
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// name indexes. These name indexes are a map of sorted ConstString + T pairs
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// and when they are decoded from a file, they are no longer sorted since
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// ConstString objects can be sorted by "const char *" and the order in which
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// these strings are created won't be the same in a new process. We need to
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// ensure these name lookups happen correctly when we load the name indexes,
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// so this test loads a symbol table from a cache file from
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// "lldb/unittests/Symbol/Inputs/indexnames-symtab-cache" and make sure we
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// can correctly lookup each of the names in the symbol table.
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auto ExpectedFile = TestFile::fromYaml(R"(
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--- !mach-o
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FileHeader:
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magic: 0xFEEDFACF
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cputype: 0x100000C
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cpusubtype: 0x0
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filetype: 0x2
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ncmds: 16
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sizeofcmds: 744
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reserved: 0x0
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LoadCommands:
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cmdsize: 72
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segname: __PAGEZERO
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vmaddr: 0
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vmsize: 4294967296
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vmaddr: 4294967296
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vmsize: 16384
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fileoff: 0
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filesize: 16384
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nsects: 2
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flags: 0
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Sections:
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strsize: 176
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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,
|
|
0x69, 0x6c, 0x65, 0x73, 0x2f, 0x69, 0x6e, 0x64,
|
|
0x65, 0x78, 0x2d, 0x6e, 0x61, 0x6d, 0x65, 0x73,
|
|
0x2f, 0x6d, 0x61, 0x69, 0x6e, 0x2e, 0x6f, 0x00,
|
|
0x66, 0x6f, 0x6f, 0x00, 0x62, 0x61, 0x72, 0x00,
|
|
0x62, 0x61, 0x7a, 0x00, 0x6d, 0x61, 0x69, 0x6e,
|
|
0x00, 0x5f, 0x6d, 0x68, 0x5f, 0x65, 0x78, 0x65,
|
|
0x63, 0x75, 0x74, 0x65, 0x5f, 0x68, 0x65, 0x61,
|
|
0x64, 0x65, 0x72, 0x00, 0x53, 0x59, 0x4d, 0x42,
|
|
0x01, 0x00, 0x00, 0x00, 0x07, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x08, 0x2a,
|
|
0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x64, 0x00, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
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,
|
|
0x01, 0x00, 0x00, 0x00, 0x08, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00,
|
|
0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x32,
|
|
0x01, 0x75, 0x00, 0x00, 0x00, 0x01, 0x74, 0x3f,
|
|
0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x08, 0x00,
|
|
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x0f, 0x00, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x02, 0x32, 0x01, 0x79, 0x00, 0x00, 0x00, 0x01,
|
|
0x7c, 0x3f, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
|
|
0x34, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x0f, 0x00, 0x14, 0x00, 0x00, 0x00,
|
|
0x00, 0x00, 0x04, 0x12, 0x02, 0x7e, 0x00, 0x00,
|
|
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);
|
|
}
|