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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome_elf/chrome_elf_main.h" | 5 #include "chrome_elf/chrome_elf_main.h" |
6 | 6 |
7 #include <assert.h> | |
8 #include <windows.h> | 7 #include <windows.h> |
| 8 #include <algorithm> |
9 | 9 |
| 10 #include "base/lazy_instance.h" |
| 11 #include "base/strings/string16.h" |
| 12 #include "base/win/iat_patch_function.h" |
| 13 #include "build/build_config.h" |
| 14 #include "chrome/app/chrome_crash_reporter_client_win.h" |
10 #include "chrome/install_static/install_util.h" | 15 #include "chrome/install_static/install_util.h" |
11 #include "chrome_elf/blacklist/blacklist.h" | 16 #include "chrome_elf/blacklist/blacklist.h" |
12 #include "chrome_elf/crash/crash_helper.h" | 17 #include "chrome_elf/blacklist/crashpad_helper.h" |
| 18 #include "chrome_elf/chrome_elf_constants.h" |
| 19 #include "components/crash/content/app/crashpad.h" |
| 20 #include "components/crash/core/common/crash_keys.h" |
| 21 |
| 22 namespace { |
| 23 |
| 24 base::LazyInstance<std::vector<crash_reporter::Report>>::Leaky g_crash_reports = |
| 25 LAZY_INSTANCE_INITIALIZER; |
| 26 |
| 27 // Gets the exe name from the full path of the exe. |
| 28 base::string16 GetExeName() { |
| 29 wchar_t file_path[MAX_PATH] = {}; |
| 30 if (!::GetModuleFileName(nullptr, file_path, arraysize(file_path))) { |
| 31 assert(false); |
| 32 return base::string16(); |
| 33 } |
| 34 base::string16 file_name_string = file_path; |
| 35 size_t last_slash_pos = file_name_string.find_last_of(L'\\'); |
| 36 if (last_slash_pos != base::string16::npos) { |
| 37 file_name_string = file_name_string.substr( |
| 38 last_slash_pos + 1, file_name_string.length() - last_slash_pos); |
| 39 } |
| 40 std::transform(file_name_string.begin(), file_name_string.end(), |
| 41 file_name_string.begin(), ::tolower); |
| 42 return file_name_string; |
| 43 } |
| 44 |
| 45 void InitializeCrashReportingForProcess() { |
| 46 // We want to initialize crash reporting only in chrome.exe |
| 47 if (GetExeName() != L"chrome.exe") |
| 48 return; |
| 49 ChromeCrashReporterClient::InitializeCrashReportingForProcess(); |
| 50 } |
| 51 |
| 52 #if !defined(ADDRESS_SANITIZER) |
| 53 // chrome_elf loads early in the process and initializes Crashpad. That in turn |
| 54 // uses the SetUnhandledExceptionFilter API to set a top level exception |
| 55 // handler for the process. When the process eventually initializes, CRT sets |
| 56 // an exception handler which calls TerminateProcess which effectively bypasses |
| 57 // us. Ideally we want to be at the top of the unhandled exception filter |
| 58 // chain. However we don't have a good way of intercepting the |
| 59 // SetUnhandledExceptionFilter API in the sandbox. EAT patching kernel32 or |
| 60 // kernelbase should ideally work. However the kernel32 kernelbase dlls are |
| 61 // prebound which causes EAT patching to not work. Sidestep works. However it |
| 62 // is only supported for 32 bit. For now we use IAT patching for the |
| 63 // executable. |
| 64 // TODO(ananta). |
| 65 // Check if it is possible to fix EAT patching or use sidestep patching for |
| 66 // 32 bit and 64 bit for this purpose. |
| 67 base::win::IATPatchFunction g_set_unhandled_exception_filter; |
| 68 |
| 69 LPTOP_LEVEL_EXCEPTION_FILTER WINAPI |
| 70 SetUnhandledExceptionFilterPatch(LPTOP_LEVEL_EXCEPTION_FILTER filter) { |
| 71 // Don't set the exception filter. Please see above for comments. |
| 72 return nullptr; |
| 73 } |
| 74 |
| 75 // Please refer above to more information about why we intercept the |
| 76 // SetUnhandledExceptionFilter API. |
| 77 void DisableSetUnhandledExceptionFilter() { |
| 78 DWORD patched = g_set_unhandled_exception_filter.PatchFromModule( |
| 79 GetModuleHandle(nullptr), "kernel32.dll", "SetUnhandledExceptionFilter", |
| 80 SetUnhandledExceptionFilterPatch); |
| 81 CHECK(patched == 0); |
| 82 } |
| 83 #endif // !defined(ADDRESS_SANITIZER) |
| 84 |
| 85 } // namespace |
13 | 86 |
14 void SignalChromeElf() { | 87 void SignalChromeElf() { |
15 blacklist::ResetBeacon(); | 88 blacklist::ResetBeacon(); |
16 } | 89 } |
17 | 90 |
| 91 // This helper is invoked by code in chrome.dll to retrieve the crash reports. |
| 92 // See CrashUploadListCrashpad. Note that we do not pass an std::vector here, |
| 93 // because we do not want to allocate/free in different modules. The returned |
| 94 // pointer is read-only. |
| 95 extern "C" __declspec(dllexport) void GetCrashReportsImpl( |
| 96 const crash_reporter::Report** reports, |
| 97 size_t* report_count) { |
| 98 crash_reporter::GetReports(g_crash_reports.Pointer()); |
| 99 *reports = g_crash_reports.Pointer()->data(); |
| 100 *report_count = g_crash_reports.Pointer()->size(); |
| 101 } |
| 102 |
| 103 // This helper is invoked by debugging code in chrome to register the client |
| 104 // id. |
| 105 extern "C" __declspec(dllexport) void SetMetricsClientId( |
| 106 const char* client_id) { |
| 107 if (client_id) |
| 108 crash_keys::SetMetricsClientIdFromGUID(client_id); |
| 109 } |
| 110 |
18 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) { | 111 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) { |
19 if (reason == DLL_PROCESS_ATTACH) { | 112 if (reason == DLL_PROCESS_ATTACH) { |
20 if (!elf_crash::InitializeCrashReporting()) { | 113 InitializeCrashReportingForProcess(); |
21 #ifdef _DEBUG | 114 // CRT on initialization installs an exception filter which calls |
22 assert(false); | 115 // TerminateProcess. We need to hook CRT's attempt to set an exception |
23 #endif // _DEBUG | 116 // handler and ignore it. Don't do this when ASan is present, or ASan will |
24 } | 117 // fail to install its own unhandled exception filter. |
25 // CRT on initialization installs an exception filter which calls | |
26 // TerminateProcess. We need to hook CRT's attempt to set an exception. | |
27 // NOTE: Do not hook if ASan is present, or ASan will fail to install | |
28 // its own unhandled exception filter. | |
29 #if !defined(ADDRESS_SANITIZER) | 118 #if !defined(ADDRESS_SANITIZER) |
30 elf_crash::DisableSetUnhandledExceptionFilter(); | 119 DisableSetUnhandledExceptionFilter(); |
31 #endif // !defined (ADDRESS_SANITIZER) | 120 #endif |
32 | 121 |
33 install_static::InitializeProcessType(); | 122 install_static::InitializeProcessType(); |
34 | 123 |
35 __try { | 124 __try { |
36 blacklist::Initialize(false); // Don't force, abort if beacon is present. | 125 blacklist::Initialize(false); // Don't force, abort if beacon is present. |
37 } __except (elf_crash::GenerateCrashDump(GetExceptionInformation())) { | 126 } __except(GenerateCrashDump(GetExceptionInformation())) { |
38 } | 127 } |
39 } else if (reason == DLL_PROCESS_DETACH) { | |
40 elf_crash::ShutdownCrashReporting(); | |
41 } | 128 } |
42 return TRUE; | 129 return TRUE; |
43 } | 130 } |
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