The Tor Browser: toolkit/crashreporter/google-breakpad/src/common/linux/synth_elf

toolkit/crashreporter/google-breakpad/src/common/linux/synth_elf_unittest.cc@129ffea94266 (annotated)

toolkit/crashreporter/google-breakpad/src/common/linux/synth_elf_unittest.cc

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 // 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>
 // synth_elf_unittest.cc:
 // Unittests for google_breakpad::synth_elf::ELF
 #include <elf.h>
 #include "breakpad_googletest_includes.h"
 #include "common/linux/elfutils.h"
 #include "common/linux/synth_elf.h"
 #include "common/using_std_string.h"
 using google_breakpad::ElfClass32;
 using google_breakpad::ElfClass64;
 using google_breakpad::synth_elf::ELF;
 using google_breakpad::synth_elf::Notes;
 using google_breakpad::synth_elf::Section;
 using google_breakpad::synth_elf::StringTable;
 using google_breakpad::synth_elf::SymbolTable;
 using google_breakpad::test_assembler::Endianness;
 using google_breakpad::test_assembler::kBigEndian;
 using google_breakpad::test_assembler::kLittleEndian;
 using google_breakpad::test_assembler::Label;
 using ::testing::Test;
 using ::testing::Types;
 class StringTableTest : public Test {
 public:
   StringTableTest() : table(kLittleEndian) {}
   StringTable table;
 };
 TEST_F(StringTableTest, Empty) {
   EXPECT_EQ(1U, table.Size());
   string contents;
   ASSERT_TRUE(table.GetContents(&contents));
   const char* kExpectedContents = "\0";
   EXPECT_EQ(0, memcmp(kExpectedContents,
                       contents.c_str(),
                       contents.size()));
   ASSERT_TRUE(table.empty_string.IsKnownConstant());
   EXPECT_EQ(0U, table.empty_string.Value());
 }
 TEST_F(StringTableTest, Basic) {
   const string s1("table fills with strings");
   const string s2("offsets preserved as labels");
   const string s3("verified with tests");
   const char* kExpectedContents =
     "\0table fills with strings\0"
     "offsets preserved as labels\0"
     "verified with tests\0";
   Label l1(table.Add(s1));
   Label l2(table.Add(s2));
   Label l3(table.Add(s3));
   string contents;
   ASSERT_TRUE(table.GetContents(&contents));
   EXPECT_EQ(0, memcmp(kExpectedContents,
                       contents.c_str(),
                       contents.size()));
   // empty_string is at zero, other strings start at 1.
   ASSERT_TRUE(l1.IsKnownConstant());
   EXPECT_EQ(1U, l1.Value());
   // Each string has an extra byte for a trailing null.
   EXPECT_EQ(1 + s1.length() + 1, l2.Value());
   EXPECT_EQ(1 + s1.length() + 1 + s2.length() + 1, l3.Value());
 }
 TEST_F(StringTableTest, Duplicates) {
   const string s1("string 1");
   const string s2("string 2");
   const string s3("");
   const char* kExpectedContents = "\0string 1\0string 2\0";
   Label l1(table.Add(s1));
   Label l2(table.Add(s2));
   // Adding strings twice should return the same Label.
   Label l3(table.Add(s3));
   Label l4(table.Add(s2));
   string contents;
   ASSERT_TRUE(table.GetContents(&contents));
   EXPECT_EQ(0, memcmp(kExpectedContents,
                       contents.c_str(),
                       contents.size()));
   EXPECT_EQ(0U, table.empty_string.Value());
   EXPECT_EQ(table.empty_string.Value(), l3.Value());
   EXPECT_EQ(l2.Value(), l4.Value());
 }
 class SymbolTableTest : public Test {};
 TEST_F(SymbolTableTest, Simple32) {
   StringTable table(kLittleEndian);
   SymbolTable syms(kLittleEndian, 4, table);
   const string kFuncName1 = "superfunc";
   const uint32_t kFuncAddr1 = 0x10001000;
   const uint32_t kFuncSize1 = 0x10;
   const string kFuncName2 = "awesomefunc";
   const uint32_t kFuncAddr2 = 0x20002000;
   const uint32_t kFuncSize2 = 0x2f;
   const string kFuncName3 = "megafunc";
   const uint32_t kFuncAddr3 = 0x30003000;
   const uint32_t kFuncSize3 = 0x3c;
   syms.AddSymbol(kFuncName1, kFuncAddr1, kFuncSize1,
                  ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
                  SHN_UNDEF + 1);
   syms.AddSymbol(kFuncName2, kFuncAddr2, kFuncSize2,
                  ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
                  SHN_UNDEF + 2);
   syms.AddSymbol(kFuncName3, kFuncAddr3, kFuncSize3,
                  ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
                  SHN_UNDEF + 3);
   const char kExpectedStringTable[] = "\0superfunc\0awesomefunc\0megafunc";
   const size_t kExpectedStringTableSize = sizeof(kExpectedStringTable);
   EXPECT_EQ(kExpectedStringTableSize, table.Size());
   string table_contents;
   table.GetContents(&table_contents);
   EXPECT_EQ(0, memcmp(kExpectedStringTable,
                       table_contents.c_str(),
                       table_contents.size()));
   const uint8_t kExpectedSymbolContents[] = {
     // Symbol 1
 x01, 0x00, 0x00, 0x00, // name
 x00, 0x10, 0x00, 0x10, // value
 x10, 0x00, 0x00, 0x00, // size
     ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), // info
 x00, // other
 x01, 0x00, // shndx
     // Symbol 2
 x0B, 0x00, 0x00, 0x00, // name
 x00, 0x20, 0x00, 0x20, // value
 x2f, 0x00, 0x00, 0x00, // size
     ELF32_ST_INFO(STB_LOCAL, STT_FUNC), // info
 x00, // other
 x02, 0x00, // shndx
     // Symbol 3
 x17, 0x00, 0x00, 0x00, // name
 x00, 0x30, 0x00, 0x30, // value
 x3c, 0x00, 0x00, 0x00, // size
     ELF32_ST_INFO(STB_LOCAL, STT_FUNC), // info
 x00, // other
 x03, 0x00, // shndx
   };
   const size_t kExpectedSymbolSize = sizeof(kExpectedSymbolContents);
   EXPECT_EQ(kExpectedSymbolSize, syms.Size());
   string symbol_contents;
   syms.GetContents(&symbol_contents);
   EXPECT_EQ(0, memcmp(kExpectedSymbolContents,
                       symbol_contents.c_str(),
                       symbol_contents.size()));
 }
 template<typename ElfClass>
 class BasicElf : public Test {};
 // Doesn't seem worthwhile writing the tests to be endian-independent
 // when they're unlikely to ever be run on big-endian systems.
 #if defined(__i386__) || defined(__x86_64__)
 typedef Types<ElfClass32, ElfClass64> ElfClasses;
 TYPED_TEST_CASE(BasicElf, ElfClasses);
 TYPED_TEST(BasicElf, EmptyLE) {
   typedef typename TypeParam::Ehdr Ehdr;
   typedef typename TypeParam::Phdr Phdr;
   typedef typename TypeParam::Shdr Shdr;
   const size_t kStringTableSize = sizeof("\0.shstrtab");
   const size_t kStringTableAlign = 4 - kStringTableSize % 4;
   const size_t kExpectedSize = sizeof(Ehdr) +
     // Two sections, SHT_NULL + the section header string table.
 * sizeof(Shdr) +
     kStringTableSize + kStringTableAlign;
   // It doesn't really matter that the machine type is right for the class.
   ELF elf(EM_386, TypeParam::kClass, kLittleEndian);
   elf.Finish();
   EXPECT_EQ(kExpectedSize, elf.Size());
   string contents;
   ASSERT_TRUE(elf.GetContents(&contents));
   ASSERT_EQ(kExpectedSize, contents.size());
   const Ehdr* header =
     reinterpret_cast<const Ehdr*>(contents.data());
   const uint8_t kIdent[] = {
     ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,
     TypeParam::kClass, ELFDATA2LSB, EV_CURRENT, ELFOSABI_SYSV,
 , 0, 0, 0, 0, 0, 0, 0
   };
   EXPECT_EQ(0, memcmp(kIdent, header->e_ident, sizeof(kIdent)));
   EXPECT_EQ(ET_EXEC, header->e_type);
   EXPECT_EQ(EM_386, header->e_machine);
   EXPECT_EQ(static_cast<unsigned int>(EV_CURRENT), header->e_version);
   EXPECT_EQ(0U, header->e_entry);
   EXPECT_EQ(0U, header->e_phoff);
   EXPECT_EQ(sizeof(Ehdr) + kStringTableSize + kStringTableAlign,
             header->e_shoff);
   EXPECT_EQ(0U, header->e_flags);
   EXPECT_EQ(sizeof(Ehdr), header->e_ehsize);
   EXPECT_EQ(sizeof(Phdr), header->e_phentsize);
   EXPECT_EQ(0, header->e_phnum);
   EXPECT_EQ(sizeof(Shdr), header->e_shentsize);
   EXPECT_EQ(2, header->e_shnum);
   EXPECT_EQ(1, header->e_shstrndx);
   const Shdr* shdr =
     reinterpret_cast<const Shdr*>(contents.data() + header->e_shoff);
   EXPECT_EQ(0U, shdr[0].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_NULL), shdr[0].sh_type);
   EXPECT_EQ(0U, shdr[0].sh_flags);
   EXPECT_EQ(0U, shdr[0].sh_addr);
   EXPECT_EQ(0U, shdr[0].sh_offset);
   EXPECT_EQ(0U, shdr[0].sh_size);
   EXPECT_EQ(0U, shdr[0].sh_link);
   EXPECT_EQ(0U, shdr[0].sh_info);
   EXPECT_EQ(0U, shdr[0].sh_addralign);
   EXPECT_EQ(0U, shdr[0].sh_entsize);
   EXPECT_EQ(1U, shdr[1].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_STRTAB), shdr[1].sh_type);
   EXPECT_EQ(0U, shdr[1].sh_flags);
   EXPECT_EQ(0U, shdr[1].sh_addr);
   EXPECT_EQ(sizeof(Ehdr), shdr[1].sh_offset);
   EXPECT_EQ(kStringTableSize, shdr[1].sh_size);
   EXPECT_EQ(0U, shdr[1].sh_link);
   EXPECT_EQ(0U, shdr[1].sh_info);
   EXPECT_EQ(0U, shdr[1].sh_addralign);
   EXPECT_EQ(0U, shdr[1].sh_entsize);
 }
 TYPED_TEST(BasicElf, BasicLE) {
   typedef typename TypeParam::Ehdr Ehdr;
   typedef typename TypeParam::Phdr Phdr;
   typedef typename TypeParam::Shdr Shdr;
   const size_t kStringTableSize = sizeof("\0.text\0.bss\0.shstrtab");
   const size_t kStringTableAlign = 4 - kStringTableSize % 4;
   const size_t kExpectedSize = sizeof(Ehdr) +
     // Four sections, SHT_NULL + the section header string table +
     // 4096 bytes of the size-aligned .text section + one program header.
     sizeof(Phdr) + 4 * sizeof(Shdr) + 4096 +
     kStringTableSize + kStringTableAlign;
   // It doesn't really matter that the machine type is right for the class.
   ELF elf(EM_386, TypeParam::kClass, kLittleEndian);
   Section text(kLittleEndian);
   text.Append(4094, 0);
   int text_idx = elf.AddSection(".text", text, SHT_PROGBITS);
   Section bss(kLittleEndian);
   bss.Append(16, 0);
   int bss_idx = elf.AddSection(".bss", bss, SHT_NOBITS);
   elf.AddSegment(text_idx, bss_idx, PT_LOAD);
   elf.Finish();
   EXPECT_EQ(kExpectedSize, elf.Size());
   string contents;
   ASSERT_TRUE(elf.GetContents(&contents));
   ASSERT_EQ(kExpectedSize, contents.size());
   const Ehdr* header =
     reinterpret_cast<const Ehdr*>(contents.data());
   const uint8_t kIdent[] = {
     ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,
     TypeParam::kClass, ELFDATA2LSB, EV_CURRENT, ELFOSABI_SYSV,
 , 0, 0, 0, 0, 0, 0, 0
   };
   EXPECT_EQ(0, memcmp(kIdent, header->e_ident, sizeof(kIdent)));
   EXPECT_EQ(ET_EXEC, header->e_type);
   EXPECT_EQ(EM_386, header->e_machine);
   EXPECT_EQ(static_cast<unsigned int>(EV_CURRENT), header->e_version);
   EXPECT_EQ(0U, header->e_entry);
   EXPECT_EQ(sizeof(Ehdr), header->e_phoff);
   EXPECT_EQ(sizeof(Ehdr) + sizeof(Phdr) + 4096 + kStringTableSize +
             kStringTableAlign, header->e_shoff);
   EXPECT_EQ(0U, header->e_flags);
   EXPECT_EQ(sizeof(Ehdr), header->e_ehsize);
   EXPECT_EQ(sizeof(Phdr), header->e_phentsize);
   EXPECT_EQ(1, header->e_phnum);
   EXPECT_EQ(sizeof(Shdr), header->e_shentsize);
   EXPECT_EQ(4, header->e_shnum);
   EXPECT_EQ(3, header->e_shstrndx);
   const Shdr* shdr =
     reinterpret_cast<const Shdr*>(contents.data() + header->e_shoff);
   EXPECT_EQ(0U, shdr[0].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_NULL), shdr[0].sh_type);
   EXPECT_EQ(0U, shdr[0].sh_flags);
   EXPECT_EQ(0U, shdr[0].sh_addr);
   EXPECT_EQ(0U, shdr[0].sh_offset);
   EXPECT_EQ(0U, shdr[0].sh_size);
   EXPECT_EQ(0U, shdr[0].sh_link);
   EXPECT_EQ(0U, shdr[0].sh_info);
   EXPECT_EQ(0U, shdr[0].sh_addralign);
   EXPECT_EQ(0U, shdr[0].sh_entsize);
   EXPECT_EQ(1U, shdr[1].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_PROGBITS), shdr[1].sh_type);
   EXPECT_EQ(0U, shdr[1].sh_flags);
   EXPECT_EQ(0U, shdr[1].sh_addr);
   EXPECT_EQ(sizeof(Ehdr) + sizeof(Phdr), shdr[1].sh_offset);
   EXPECT_EQ(4094U, shdr[1].sh_size);
   EXPECT_EQ(0U, shdr[1].sh_link);
   EXPECT_EQ(0U, shdr[1].sh_info);
   EXPECT_EQ(0U, shdr[1].sh_addralign);
   EXPECT_EQ(0U, shdr[1].sh_entsize);
   EXPECT_EQ(sizeof("\0.text"), shdr[2].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_NOBITS), shdr[2].sh_type);
   EXPECT_EQ(0U, shdr[2].sh_flags);
   EXPECT_EQ(0U, shdr[2].sh_addr);
   EXPECT_EQ(0U, shdr[2].sh_offset);
   EXPECT_EQ(16U, shdr[2].sh_size);
   EXPECT_EQ(0U, shdr[2].sh_link);
   EXPECT_EQ(0U, shdr[2].sh_info);
   EXPECT_EQ(0U, shdr[2].sh_addralign);
   EXPECT_EQ(0U, shdr[2].sh_entsize);
   EXPECT_EQ(sizeof("\0.text\0.bss"), shdr[3].sh_name);
   EXPECT_EQ(static_cast<unsigned int>(SHT_STRTAB), shdr[3].sh_type);
   EXPECT_EQ(0U, shdr[3].sh_flags);
   EXPECT_EQ(0U, shdr[3].sh_addr);
   EXPECT_EQ(sizeof(Ehdr) + sizeof(Phdr) + 4096, shdr[3].sh_offset);
   EXPECT_EQ(kStringTableSize, shdr[3].sh_size);
   EXPECT_EQ(0U, shdr[3].sh_link);
   EXPECT_EQ(0U, shdr[3].sh_info);
   EXPECT_EQ(0U, shdr[3].sh_addralign);
   EXPECT_EQ(0U, shdr[3].sh_entsize);
   const Phdr* phdr =
     reinterpret_cast<const Phdr*>(contents.data() + header->e_phoff);
   EXPECT_EQ(static_cast<unsigned int>(PT_LOAD), phdr->p_type);
   EXPECT_EQ(sizeof(Ehdr) + sizeof(Phdr), phdr->p_offset);
   EXPECT_EQ(0U, phdr->p_vaddr);
   EXPECT_EQ(0U, phdr->p_paddr);
   EXPECT_EQ(4096U, phdr->p_filesz);
   EXPECT_EQ(4096U + 16U, phdr->p_memsz);
   EXPECT_EQ(0U, phdr->p_flags);
   EXPECT_EQ(0U, phdr->p_align);
 }
 class ElfNotesTest : public Test {};
 TEST_F(ElfNotesTest, Empty) {
   Notes notes(kLittleEndian);
   string contents;
   ASSERT_TRUE(notes.GetContents(&contents));
   EXPECT_EQ(0U, contents.size());
 }
 TEST_F(ElfNotesTest, Notes) {
   Notes notes(kLittleEndian);
   notes.AddNote(1, "Linux", reinterpret_cast<const uint8_t *>("\x42\x02\0\0"),
 );
   notes.AddNote(2, "a", reinterpret_cast<const uint8_t *>("foobar"),
                 sizeof("foobar") - 1);
   const uint8_t kExpectedNotesContents[] = {
     // Note 1
 x06, 0x00, 0x00, 0x00, // name size, including terminating zero
 x04, 0x00, 0x00, 0x00, // desc size
 x01, 0x00, 0x00, 0x00, // type
     'L', 'i', 'n', 'u', 'x', 0x00, 0x00, 0x00, // padded "Linux"
 x42, 0x02, 0x00, 0x00, // desc
     // Note 2
 x02, 0x00, 0x00, 0x00, // name size
 x06, 0x00, 0x00, 0x00, // desc size
 x02, 0x00, 0x00, 0x00, // type
     'a',  0x00, 0x00, 0x00, // padded "a"
     'f', 'o', 'o', 'b', 'a', 'r', 0x00, 0x00, // padded "foobar"
   };
   const size_t kExpectedNotesSize = sizeof(kExpectedNotesContents);
   EXPECT_EQ(kExpectedNotesSize, notes.Size());
   string notes_contents;
   ASSERT_TRUE(notes.GetContents(&notes_contents));
   EXPECT_EQ(0, memcmp(kExpectedNotesContents,
                       notes_contents.data(),
                       notes_contents.size()));
 }
 #endif  // defined(__i386__) || defined(__x86_64__)

The Tor Browser / annotate

toolkit/crashreporter/google-breakpad/src/common/linux/synth_elf_unittest.cc@129ffea94266 (annotated)

toolkit/crashreporter/google-breakpad/src/common/linux/synth_elf_unittest.cc