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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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