1 // Copyright (c) 2011 Google Inc. 2 // All rights reserved. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are 6 // met: 7 // 8 // * Redistributions of source code must retain the above copyright 9 // notice, this list of conditions and the following disclaimer. 10 // * Redistributions in binary form must reproduce the above 11 // copyright notice, this list of conditions and the following disclaimer 12 // in the documentation and/or other materials provided with the 13 // distribution. 14 // * Neither the name of Google Inc. nor the names of its 15 // contributors may be used to endorse or promote products derived from 16 // this software without specific prior written permission. 17 // 18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 30 // Original author: Ted Mielczarek <ted.mielczarek (at) gmail.com> 31 32 // dump_symbols_unittest.cc: 33 // Unittests for google_breakpad::DumpSymbols 34 35 #include <elf.h> 36 #include <link.h> 37 #include <stdio.h> 38 39 #include <sstream> 40 #include <vector> 41 42 #include "breakpad_googletest_includes.h" 43 #include "common/linux/dump_symbols.h" 44 #include "common/linux/synth_elf.h" 45 #include "common/module.h" 46 #include "common/using_std_string.h" 47 48 namespace google_breakpad { 49 50 bool ReadSymbolDataInternal(const uint8_t* obj_file, 51 const string& obj_filename, 52 const std::vector<string>& debug_dir, 53 const DumpOptions& options, 54 Module** module); 55 56 using google_breakpad::synth_elf::ELF; 57 using google_breakpad::synth_elf::StringTable; 58 using google_breakpad::synth_elf::SymbolTable; 59 using google_breakpad::test_assembler::kLittleEndian; 60 using google_breakpad::test_assembler::Section; 61 using std::stringstream; 62 using std::vector; 63 using ::testing::Test; 64 65 class DumpSymbols : public Test { 66 public: 67 void GetElfContents(ELF& elf) { 68 string contents; 69 ASSERT_TRUE(elf.GetContents(&contents)); 70 ASSERT_LT(0U, contents.size()); 71 72 elfdata_v.clear(); 73 elfdata_v.insert(elfdata_v.begin(), contents.begin(), contents.end()); 74 elfdata = &elfdata_v[0]; 75 } 76 77 vector<uint8_t> elfdata_v; 78 uint8_t* elfdata; 79 }; 80 81 TEST_F(DumpSymbols, Invalid) { 82 Elf32_Ehdr header; 83 memset(&header, 0, sizeof(header)); 84 Module* module; 85 DumpOptions options(ALL_SYMBOL_DATA, true); 86 EXPECT_FALSE(ReadSymbolDataInternal(reinterpret_cast<uint8_t*>(&header), 87 "foo", 88 vector<string>(), 89 options, 90 &module)); 91 } 92 93 TEST_F(DumpSymbols, SimplePublic32) { 94 ELF elf(EM_386, ELFCLASS32, kLittleEndian); 95 // Zero out text section for simplicity. 96 Section text(kLittleEndian); 97 text.Append(4096, 0); 98 elf.AddSection(".text", text, SHT_PROGBITS); 99 100 // Add a public symbol. 101 StringTable table(kLittleEndian); 102 SymbolTable syms(kLittleEndian, 4, table); 103 syms.AddSymbol("superfunc", (uint32_t)0x1000, (uint32_t)0x10, 104 ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), 105 SHN_UNDEF + 1); 106 int index = elf.AddSection(".dynstr", table, SHT_STRTAB); 107 elf.AddSection(".dynsym", syms, 108 SHT_DYNSYM, // type 109 SHF_ALLOC, // flags 110 0, // addr 111 index, // link 112 sizeof(Elf32_Sym)); // entsize 113 114 elf.Finish(); 115 GetElfContents(elf); 116 117 Module* module; 118 DumpOptions options(ALL_SYMBOL_DATA, true); 119 EXPECT_TRUE(ReadSymbolDataInternal(elfdata, 120 "foo", 121 vector<string>(), 122 options, 123 &module)); 124 125 stringstream s; 126 module->Write(s, ALL_SYMBOL_DATA); 127 EXPECT_EQ("MODULE Linux x86 000000000000000000000000000000000 foo\n" 128 "PUBLIC 1000 0 superfunc\n", 129 s.str()); 130 delete module; 131 } 132 133 TEST_F(DumpSymbols, SimplePublic64) { 134 ELF elf(EM_X86_64, ELFCLASS64, kLittleEndian); 135 // Zero out text section for simplicity. 136 Section text(kLittleEndian); 137 text.Append(4096, 0); 138 elf.AddSection(".text", text, SHT_PROGBITS); 139 140 // Add a public symbol. 141 StringTable table(kLittleEndian); 142 SymbolTable syms(kLittleEndian, 8, table); 143 syms.AddSymbol("superfunc", (uint64_t)0x1000, (uint64_t)0x10, 144 ELF64_ST_INFO(STB_GLOBAL, STT_FUNC), 145 SHN_UNDEF + 1); 146 int index = elf.AddSection(".dynstr", table, SHT_STRTAB); 147 elf.AddSection(".dynsym", syms, 148 SHT_DYNSYM, // type 149 SHF_ALLOC, // flags 150 0, // addr 151 index, // link 152 sizeof(Elf64_Sym)); // entsize 153 154 elf.Finish(); 155 GetElfContents(elf); 156 157 Module* module; 158 DumpOptions options(ALL_SYMBOL_DATA, true); 159 EXPECT_TRUE(ReadSymbolDataInternal(elfdata, 160 "foo", 161 vector<string>(), 162 options, 163 &module)); 164 165 stringstream s; 166 module->Write(s, ALL_SYMBOL_DATA); 167 EXPECT_EQ("MODULE Linux x86_64 000000000000000000000000000000000 foo\n" 168 "PUBLIC 1000 0 superfunc\n", 169 s.str()); 170 } 171 172 } // namespace google_breakpad 173
