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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 // This module contains the necessary code to register the Breakpad exception |
| 6 // handler. This implementation is based on Chrome's crash reporting code. |
| 7 |
| 8 #include "chrome_elf/breakpad.h" |
| 9 |
| 10 #include <sddl.h> |
| 11 |
| 12 #include "base/macros.h" |
| 13 #include "base/strings/string16.h" |
| 14 #include "breakpad/src/client/windows/handler/exception_handler.h" |
| 15 #include "chrome/common/chrome_version.h" |
| 16 #include "chrome/install_static/install_util.h" |
| 17 |
| 18 google_breakpad::ExceptionHandler* g_elf_breakpad = NULL; |
| 19 |
| 20 namespace { |
| 21 |
| 22 const wchar_t kBreakpadProductName[] = L"Chrome"; |
| 23 const wchar_t kBreakpadVersionEntry[] = L"ver"; |
| 24 const wchar_t kBreakpadProdEntry[] = L"prod"; |
| 25 const wchar_t kBreakpadPlatformEntry[] = L"plat"; |
| 26 const wchar_t kBreakpadPlatformWin32[] = L"Win32"; |
| 27 const wchar_t kBreakpadProcessEntry[] = L"ptype"; |
| 28 const wchar_t kBreakpadChannelEntry[] = L"channel"; |
| 29 |
| 30 // The protocol for connecting to the out-of-process Breakpad crash |
| 31 // reporter is different for x86-32 and x86-64: the message sizes |
| 32 // are different because the message struct contains a pointer. As |
| 33 // a result, there are two different named pipes to connect to. The |
| 34 // 64-bit one is distinguished with an "-x64" suffix. |
| 35 const wchar_t kChromePipeName[] = L"\\\\.\\pipe\\ChromeCrashServices\\"; |
| 36 const wchar_t kGoogleUpdatePipeName[] = L"\\\\.\\pipe\\GoogleCrashServices\\"; |
| 37 const wchar_t kSystemPrincipalSid[] = L"S-1-5-18"; |
| 38 |
| 39 const wchar_t kNoErrorDialogs[] = L"noerrdialogs"; |
| 40 |
| 41 google_breakpad::CustomClientInfo* GetCustomInfo() { |
| 42 base::string16 process = |
| 43 install_static::IsNonBrowserProcess() ? L"renderer" : L"browser"; |
| 44 |
| 45 wchar_t exe_path[MAX_PATH] = {}; |
| 46 base::string16 channel; |
| 47 if (GetModuleFileName(NULL, exe_path, arraysize(exe_path)) && |
| 48 install_static::IsSxSChrome(exe_path)) { |
| 49 channel = L"canary"; |
| 50 } |
| 51 |
| 52 static google_breakpad::CustomInfoEntry ver_entry( |
| 53 kBreakpadVersionEntry, TEXT(CHROME_VERSION_STRING)); |
| 54 static google_breakpad::CustomInfoEntry prod_entry( |
| 55 kBreakpadProdEntry, kBreakpadProductName); |
| 56 static google_breakpad::CustomInfoEntry plat_entry( |
| 57 kBreakpadPlatformEntry, kBreakpadPlatformWin32); |
| 58 static google_breakpad::CustomInfoEntry proc_entry( |
| 59 kBreakpadProcessEntry, process.c_str()); |
| 60 static google_breakpad::CustomInfoEntry channel_entry( |
| 61 kBreakpadChannelEntry, channel.c_str()); |
| 62 static google_breakpad::CustomInfoEntry entries[] = { |
| 63 ver_entry, prod_entry, plat_entry, proc_entry, channel_entry}; |
| 64 static google_breakpad::CustomClientInfo custom_info = { |
| 65 entries, arraysize(entries) }; |
| 66 return &custom_info; |
| 67 } |
| 68 |
| 69 base::string16 GetUserSidString() { |
| 70 // Get the current token. |
| 71 HANDLE token = NULL; |
| 72 base::string16 user_sid; |
| 73 if (!::OpenProcessToken(::GetCurrentProcess(), TOKEN_QUERY, &token)) |
| 74 return user_sid; |
| 75 |
| 76 DWORD size = sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE; |
| 77 BYTE user_bytes[sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE] = {}; |
| 78 TOKEN_USER* user = reinterpret_cast<TOKEN_USER*>(user_bytes); |
| 79 |
| 80 wchar_t* sid_string = NULL; |
| 81 if (::GetTokenInformation(token, TokenUser, user, size, &size) && |
| 82 user->User.Sid && |
| 83 ::ConvertSidToStringSid(user->User.Sid, &sid_string)) { |
| 84 user_sid = sid_string; |
| 85 ::LocalFree(sid_string); |
| 86 } |
| 87 |
| 88 CloseHandle(token); |
| 89 return user_sid; |
| 90 } |
| 91 |
| 92 bool IsHeadless() { |
| 93 DWORD ret = ::GetEnvironmentVariable(L"CHROME_HEADLESS", NULL, 0); |
| 94 if (ret != 0) |
| 95 return true; |
| 96 |
| 97 wchar_t* command_line = ::GetCommandLine(); |
| 98 |
| 99 // Note: Since this is a pure substring search rather than a check for a |
| 100 // switch, there is a small chance that this code will match things that the |
| 101 // Chrome code (which executes a similar check) does not. However, as long as |
| 102 // no other switches contain the string "noerrdialogs", it should not be an |
| 103 // issue. |
| 104 return (command_line && wcsstr(command_line, kNoErrorDialogs)); |
| 105 } |
| 106 |
| 107 } // namespace |
| 108 |
| 109 int GenerateCrashDump(EXCEPTION_POINTERS* exinfo) { |
| 110 DWORD code = exinfo->ExceptionRecord->ExceptionCode; |
| 111 if (code == EXCEPTION_BREAKPOINT || code == EXCEPTION_SINGLE_STEP) |
| 112 return EXCEPTION_CONTINUE_SEARCH; |
| 113 |
| 114 if (g_elf_breakpad != NULL) |
| 115 g_elf_breakpad->WriteMinidumpForException(exinfo); |
| 116 return EXCEPTION_CONTINUE_SEARCH; |
| 117 } |
| 118 |
| 119 void InitializeCrashReporting() { |
| 120 wchar_t exe_path[MAX_PATH] = {}; |
| 121 if (!::GetModuleFileName(NULL, exe_path, arraysize(exe_path))) |
| 122 return; |
| 123 |
| 124 // Disable the message box for assertions. |
| 125 _CrtSetReportMode(_CRT_ASSERT, 0); |
| 126 |
| 127 // Get the alternate dump directory. We use the temp path. |
| 128 // N.B. We don't use base::GetTempDir() here to avoid running more code then |
| 129 // necessary before crashes can be properly reported. |
| 130 wchar_t temp_directory[MAX_PATH + 1] = {}; |
| 131 DWORD length = GetTempPath(MAX_PATH, temp_directory); |
| 132 if (length == 0) |
| 133 return; |
| 134 |
| 135 // Minidump with stacks, PEB, TEBs and unloaded module list. |
| 136 MINIDUMP_TYPE dump_type = static_cast<MINIDUMP_TYPE>( |
| 137 MiniDumpWithProcessThreadData | // Get PEB and TEB. |
| 138 MiniDumpWithUnloadedModules | // Get unloaded modules when available. |
| 139 MiniDumpWithIndirectlyReferencedMemory); // Get memory referenced by |
| 140 // stack. |
| 141 |
| 142 #if defined(GOOGLE_CHROME_BUILD) && defined(OFFICIAL_BUILD) |
| 143 bool is_official_chrome_build = true; |
| 144 #else |
| 145 bool is_official_chrome_build = false; |
| 146 #endif |
| 147 |
| 148 base::string16 pipe_name; |
| 149 |
| 150 bool enabled_by_policy = false; |
| 151 bool use_policy = |
| 152 install_static::ReportingIsEnforcedByPolicy(&enabled_by_policy); |
| 153 |
| 154 if (!use_policy && IsHeadless()) { |
| 155 pipe_name = kChromePipeName; |
| 156 } else if (use_policy ? enabled_by_policy |
| 157 : (is_official_chrome_build && |
| 158 install_static::GetCollectStatsConsent())) { |
| 159 // Build the pipe name. It can be one of: |
| 160 // 32-bit system: \\.\pipe\GoogleCrashServices\S-1-5-18 |
| 161 // 32-bit user: \\.\pipe\GoogleCrashServices\<user SID> |
| 162 // 64-bit system: \\.\pipe\GoogleCrashServices\S-1-5-18-x64 |
| 163 // 64-bit user: \\.\pipe\GoogleCrashServices\<user SID>-x64 |
| 164 base::string16 user_sid = install_static::IsSystemInstall(exe_path) |
| 165 ? kSystemPrincipalSid |
| 166 : GetUserSidString(); |
| 167 if (user_sid.empty()) |
| 168 return; |
| 169 |
| 170 pipe_name = kGoogleUpdatePipeName; |
| 171 pipe_name += user_sid; |
| 172 |
| 173 #if defined(_WIN64) |
| 174 pipe_name += L"-x64"; |
| 175 #endif |
| 176 } else { |
| 177 // Either this is a Chromium build, reporting is disabled by policy or the |
| 178 // user has not given consent. |
| 179 return; |
| 180 } |
| 181 |
| 182 g_elf_breakpad = new google_breakpad::ExceptionHandler( |
| 183 temp_directory, |
| 184 NULL, |
| 185 NULL, |
| 186 NULL, |
| 187 google_breakpad::ExceptionHandler::HANDLER_ALL, |
| 188 dump_type, |
| 189 pipe_name.c_str(), |
| 190 GetCustomInfo()); |
| 191 |
| 192 if (g_elf_breakpad->IsOutOfProcess()) { |
| 193 // Tells breakpad to handle breakpoint and single step exceptions. |
| 194 g_elf_breakpad->set_handle_debug_exceptions(true); |
| 195 } |
| 196 } |
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