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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 <windows.h> | 7 #include <windows.h> |
8 #include <algorithm> | |
9 | 8 |
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" | |
15 #include "chrome/install_static/install_util.h" | 9 #include "chrome/install_static/install_util.h" |
16 #include "chrome_elf/blacklist/blacklist.h" | 10 #include "chrome_elf/blacklist/blacklist.h" |
17 #include "chrome_elf/blacklist/crashpad_helper.h" | 11 #include "chrome_elf/crash/crash_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 // chrome_elf loads early in the process and initializes Crashpad. That in turn | |
53 // uses the SetUnhandledExceptionFilter API to set a top level exception | |
54 // handler for the process. When the process eventually initializes, CRT sets | |
55 // an exception handler which calls TerminateProcess which effectively bypasses | |
56 // us. Ideally we want to be at the top of the unhandled exception filter | |
57 // chain. However we don't have a good way of intercepting the | |
58 // SetUnhandledExceptionFilter API in the sandbox. EAT patching kernel32 or | |
59 // kernelbase should ideally work. However the kernel32 kernelbase dlls are | |
60 // prebound which causes EAT patching to not work. Sidestep works. However it | |
61 // is only supported for 32 bit. For now we use IAT patching for the | |
62 // executable. | |
63 // TODO(ananta). | |
64 // Check if it is possible to fix EAT patching or use sidestep patching for | |
65 // 32 bit and 64 bit for this purpose. | |
66 base::win::IATPatchFunction g_set_unhandled_exception_filter; | |
67 | |
68 LPTOP_LEVEL_EXCEPTION_FILTER WINAPI | |
69 SetUnhandledExceptionFilterPatch(LPTOP_LEVEL_EXCEPTION_FILTER filter) { | |
70 // Don't set the exception filter. Please see above for comments. | |
71 return nullptr; | |
72 } | |
73 | |
74 // Please refer above to more information about why we intercept the | |
75 // SetUnhandledExceptionFilter API. | |
76 void DisableSetUnhandledExceptionFilter() { | |
77 DWORD patched = g_set_unhandled_exception_filter.PatchFromModule( | |
78 GetModuleHandle(nullptr), "kernel32.dll", "SetUnhandledExceptionFilter", | |
79 SetUnhandledExceptionFilterPatch); | |
80 CHECK(patched == 0); | |
81 } | |
82 | |
83 } // namespace | |
84 | 12 |
85 void SignalChromeElf() { | 13 void SignalChromeElf() { |
86 blacklist::ResetBeacon(); | 14 blacklist::ResetBeacon(); |
87 } | 15 } |
88 | 16 |
89 // This helper is invoked by code in chrome.dll to retrieve the crash reports. | |
90 // See CrashUploadListCrashpad. Note that we do not pass an std::vector here, | |
91 // because we do not want to allocate/free in different modules. The returned | |
92 // pointer is read-only. | |
93 extern "C" __declspec(dllexport) void GetCrashReportsImpl( | |
94 const crash_reporter::Report** reports, | |
95 size_t* report_count) { | |
96 crash_reporter::GetReports(g_crash_reports.Pointer()); | |
97 *reports = g_crash_reports.Pointer()->data(); | |
98 *report_count = g_crash_reports.Pointer()->size(); | |
99 } | |
100 | |
101 // This helper is invoked by debugging code in chrome to register the client | |
102 // id. | |
103 extern "C" __declspec(dllexport) void SetMetricsClientId( | |
104 const char* client_id) { | |
105 if (client_id) | |
106 crash_keys::SetMetricsClientIdFromGUID(client_id); | |
107 } | |
108 | |
109 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) { | 17 BOOL APIENTRY DllMain(HMODULE module, DWORD reason, LPVOID reserved) { |
110 if (reason == DLL_PROCESS_ATTACH) { | 18 if (reason == DLL_PROCESS_ATTACH) { |
111 InitializeCrashReportingForProcess(); | 19 elf_crash::InitializeCrashReportingForProcess(); |
112 // CRT on initialization installs an exception filter which calls | 20 // CRT on initialization installs an exception filter which calls |
113 // TerminateProcess. We need to hook CRT's attempt to set an exception | 21 // TerminateProcess. We need to hook CRT's attempt to set an exception |
114 // handler and ignore it. | 22 // handler and ignore it. |
115 DisableSetUnhandledExceptionFilter(); | 23 elf_crash::DisableSetUnhandledExceptionFilter(); |
116 | 24 |
117 install_static::InitializeProcessType(); | 25 install_static::InitializeProcessType(); |
118 | 26 |
119 __try { | 27 __try { |
120 blacklist::Initialize(false); // Don't force, abort if beacon is present. | 28 blacklist::Initialize(false); // Don't force, abort if beacon is present. |
121 } __except(GenerateCrashDump(GetExceptionInformation())) { | 29 } __except (elf_crash::GenerateCrashDump(GetExceptionInformation())) { |
122 } | 30 } |
| 31 } else if (reason == DLL_PROCESS_DETACH) { |
| 32 elf_crash::DllDetachCrashReportingCleanup(); |
123 } | 33 } |
124 return TRUE; | 34 return TRUE; |
125 } | 35 } |
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