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1 // Copyright (c) 2009 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 // A class to make it easy to tag exception propagation boundaries and | |
6 // get crash reports of exceptions that pass over same. | |
7 #include "chrome_frame/exception_barrier.h" | |
8 | |
9 #include "chrome_frame/crash_reporting/vectored_handler-impl.h" | |
10 #include "chrome_frame/crash_reporting/crash_report.h" | |
11 | |
12 enum { | |
13 // Flag set by exception handling machinery when unwinding | |
14 EH_UNWINDING = 0x00000002 | |
15 }; | |
16 | |
17 bool ExceptionBarrierConfig::s_enabled_ = false; | |
18 | |
19 ExceptionBarrierCustomHandler::CustomExceptionHandler | |
20 ExceptionBarrierCustomHandler::s_custom_handler_ = NULL; | |
21 | |
22 // This function must be extern "C" to match up with the SAFESEH | |
23 // declaration in our corresponding ASM file | |
24 extern "C" EXCEPTION_DISPOSITION __cdecl | |
25 ExceptionBarrierHandler(struct _EXCEPTION_RECORD* exception_record, | |
26 void* establisher_frame, | |
27 struct _CONTEXT* context, | |
28 void* reserved) { | |
29 // When the exception is really propagating through us, we'd like to be | |
30 // called before the state of the program has been modified by the stack | |
31 // unwinding. In the absence of an exception handler, the unhandled | |
32 // exception filter gets called between the first chance and the second | |
33 // chance exceptions, so Windows pops either the JIT debugger or WER UI. | |
34 // This is not desirable in most of the cases. | |
35 EXCEPTION_POINTERS ptrs = { exception_record, context }; | |
36 | |
37 if (ExceptionBarrierConfig::enabled() && | |
38 IS_DISPATCHING(exception_record->ExceptionFlags)) { | |
39 WriteMinidumpForException(&ptrs); | |
40 } | |
41 | |
42 return ExceptionContinueSearch; | |
43 } | |
44 | |
45 extern "C" EXCEPTION_DISPOSITION __cdecl | |
46 ExceptionBarrierReportOnlyModuleHandler( | |
47 struct _EXCEPTION_RECORD* exception_record, | |
48 void* establisher_frame, | |
49 struct _CONTEXT* context, | |
50 void* reserved) { | |
51 EXCEPTION_POINTERS ptrs = { exception_record, context }; | |
52 | |
53 if (ExceptionBarrierConfig::enabled() && | |
54 IS_DISPATCHING(exception_record->ExceptionFlags)) { | |
55 CrashHandlerTraits traits; | |
56 traits.Init(0, 0, &WriteMinidumpForException); | |
57 if (traits.IsOurModule(exception_record->ExceptionAddress)) { | |
58 traits.WriteDump(&ptrs); | |
59 } | |
60 } | |
61 | |
62 return ExceptionContinueSearch; | |
63 } | |
64 | |
65 extern "C" EXCEPTION_DISPOSITION __cdecl | |
66 ExceptionBarrierCallCustomHandler(struct _EXCEPTION_RECORD* exception_record, | |
67 void* establisher_frame, | |
68 struct _CONTEXT* context, | |
69 void* reserved) { | |
70 if (ExceptionBarrierConfig::enabled() && | |
71 IS_DISPATCHING(exception_record->ExceptionFlags)) { | |
72 ExceptionBarrierCustomHandler::CustomExceptionHandler handler = | |
73 ExceptionBarrierCustomHandler::custom_handler(); | |
74 if (handler) { | |
75 EXCEPTION_POINTERS ptrs = { exception_record, context }; | |
76 handler(&ptrs); | |
77 } | |
78 } | |
79 | |
80 return ExceptionContinueSearch; | |
81 } | |
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