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// Copyright (c) 2011 Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
// dump_symbols_unittest.cc:
// Unittests for google_breakpad::DumpSymbols
#include <elf.h>
#include <link.h>
#include <stdio.h>
#include <sstream>
#include <vector>
#include "breakpad_googletest_includes.h"
#include "common/linux/elf_gnu_compat.h"
#include "common/linux/elfutils.h"
#include "common/linux/dump_symbols.h"
#include "common/linux/synth_elf.h"
#include "common/module.h"
#include "common/using_std_string.h"
namespace google_breakpad {
bool ReadSymbolDataInternal(const uint8_t* obj_file,
const string& obj_filename,
const std::vector<string>& debug_dir,
const DumpOptions& options,
Module** module);
using google_breakpad::synth_elf::ELF;
using google_breakpad::synth_elf::Notes;
using google_breakpad::synth_elf::StringTable;
using google_breakpad::synth_elf::SymbolTable;
using google_breakpad::test_assembler::kLittleEndian;
using google_breakpad::test_assembler::Section;
using std::stringstream;
using std::vector;
using ::testing::Test;
using ::testing::Types;
template<typename ElfClass>
class DumpSymbols : public Test {
public:
void GetElfContents(ELF& elf) {
string contents;
ASSERT_TRUE(elf.GetContents(&contents));
ASSERT_LT(0U, contents.size());
elfdata_v.clear();
elfdata_v.insert(elfdata_v.begin(), contents.begin(), contents.end());
elfdata = &elfdata_v[0];
}
vector<uint8_t> elfdata_v;
uint8_t* elfdata;
};
typedef Types<ElfClass32, ElfClass64> ElfClasses;
TYPED_TEST_CASE(DumpSymbols, ElfClasses);
TYPED_TEST(DumpSymbols, Invalid) {
Elf32_Ehdr header;
memset(&header, 0, sizeof(header));
Module* module;
DumpOptions options(ALL_SYMBOL_DATA, true);
EXPECT_FALSE(ReadSymbolDataInternal(reinterpret_cast<uint8_t*>(&header),
"foo",
vector<string>(),
options,
&module));
}
TYPED_TEST(DumpSymbols, SimplePublic) {
ELF elf(TypeParam::kMachine, TypeParam::kClass, kLittleEndian);
// Zero out text section for simplicity.
Section text(kLittleEndian);
text.Append(4096, 0);
elf.AddSection(".text", text, SHT_PROGBITS);
// Add a public symbol.
StringTable table(kLittleEndian);
SymbolTable syms(kLittleEndian, TypeParam::kAddrSize, table);
syms.AddSymbol("superfunc",
(typename TypeParam::Addr)0x1000,
(typename TypeParam::Addr)0x10,
// ELF32_ST_INFO works for 32-or 64-bit.
ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
SHN_UNDEF + 1);
int index = elf.AddSection(".dynstr", table, SHT_STRTAB);
elf.AddSection(".dynsym", syms,
SHT_DYNSYM, // type
SHF_ALLOC, // flags
0, // addr
index, // link
sizeof(typename TypeParam::Sym)); // entsize
elf.Finish();
this->GetElfContents(elf);
Module* module;
DumpOptions options(ALL_SYMBOL_DATA, true);
EXPECT_TRUE(ReadSymbolDataInternal(this->elfdata,
"foo",
vector<string>(),
options,
&module));
stringstream s;
module->Write(s, ALL_SYMBOL_DATA);
const string expected =
string("MODULE Linux ") + TypeParam::kMachineName
+ " 000000000000000000000000000000000 foo\n"
"INFO CODE_ID 00000000000000000000000000000000\n"
"PUBLIC 1000 0 superfunc\n";
EXPECT_EQ(expected, s.str());
delete module;
}
TYPED_TEST(DumpSymbols, SimpleBuildID) {
ELF elf(TypeParam::kMachine, TypeParam::kClass, kLittleEndian);
// Zero out text section for simplicity.
Section text(kLittleEndian);
text.Append(4096, 0);
elf.AddSection(".text", text, SHT_PROGBITS);
// Add a Build ID
const uint8_t kExpectedIdentifierBytes[] =
{0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
0x10, 0x11, 0x12, 0x13};
Notes notes(kLittleEndian);
notes.AddNote(NT_GNU_BUILD_ID, "GNU", kExpectedIdentifierBytes,
sizeof(kExpectedIdentifierBytes));
elf.AddSection(".note.gnu.build-id", notes, SHT_NOTE);
// Add a public symbol.
StringTable table(kLittleEndian);
SymbolTable syms(kLittleEndian, TypeParam::kAddrSize, table);
syms.AddSymbol("superfunc",
(typename TypeParam::Addr)0x1000,
(typename TypeParam::Addr)0x10,
// ELF32_ST_INFO works for 32-or 64-bit.
ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
SHN_UNDEF + 1);
int index = elf.AddSection(".dynstr", table, SHT_STRTAB);
elf.AddSection(".dynsym", syms,
SHT_DYNSYM, // type
SHF_ALLOC, // flags
0, // addr
index, // link
sizeof(typename TypeParam::Sym)); // entsize
elf.Finish();
this->GetElfContents(elf);
Module* module;
DumpOptions options(ALL_SYMBOL_DATA, true);
EXPECT_TRUE(ReadSymbolDataInternal(this->elfdata,
"foo",
vector<string>(),
options,
&module));
stringstream s;
module->Write(s, ALL_SYMBOL_DATA);
const string expected =
string("MODULE Linux ") + TypeParam::kMachineName
+ " 030201000504070608090A0B0C0D0E0F0 foo\n"
"INFO CODE_ID 000102030405060708090A0B0C0D0E0F10111213\n"
"PUBLIC 1000 0 superfunc\n";
EXPECT_EQ(expected, s.str());
delete module;
}
} // namespace google_breakpad
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