bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 1 | // Copyright (c) 2006, Google Inc. |
| 2 | // All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions are |
| 6 | // met: |
| 7 | // |
| 8 | // * Redistributions of source code must retain the above copyright |
| 9 | // notice, this list of conditions and the following disclaimer. |
| 10 | // * Redistributions in binary form must reproduce the above |
| 11 | // copyright notice, this list of conditions and the following disclaimer |
| 12 | // in the documentation and/or other materials provided with the |
| 13 | // distribution. |
| 14 | // * Neither the name of Google Inc. nor the names of its |
| 15 | // contributors may be used to endorse or promote products derived from |
| 16 | // this software without specific prior written permission. |
| 17 | // |
| 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | |
| 30 | // ExceptionHandler can write a minidump file when an exception occurs, |
| 31 | // or when WriteMinidump() is called explicitly by your program. |
| 32 | // |
| 33 | // To have the exception handler write minidumps when an uncaught exception |
| 34 | // (crash) occurs, you should create an instance early in the execution |
| 35 | // of your program, and keep it around for the entire time you want to |
| 36 | // have crash handling active (typically, until shutdown). |
| 37 | // |
| 38 | // If you want to write minidumps without installing the exception handler, |
| 39 | // you can create an ExceptionHandler with install_handler set to false, |
| 40 | // then call WriteMinidump. You can also use this technique if you want to |
| 41 | // use different minidump callbacks for different call sites. |
| 42 | // |
| 43 | // In either case, a callback function is called when a minidump is written, |
| 44 | // which receives the unqiue id of the minidump. The caller can use this |
| 45 | // id to collect and write additional application state, and to launch an |
| 46 | // external crash-reporting application. |
| 47 | // |
| 48 | // It is important that creation and destruction of ExceptionHandler objects |
| 49 | // be nested cleanly, when using install_handler = true. |
| 50 | // Avoid the following pattern: |
| 51 | // ExceptionHandler *e = new ExceptionHandler(...); |
| 52 | // ExceptionHandler *f = new ExceptionHandler(...); |
| 53 | // delete e; |
| 54 | // This will put the exception filter stack into an inconsistent state. |
bryner | f140025 | 2006-09-28 19:35:08 +0000 | [diff] [blame] | 55 | // |
| 56 | // To use this library in your project, you will need to link against |
mmentovai | 29401d2 | 2006-10-26 18:06:43 +0000 | [diff] [blame] | 57 | // ole32.lib. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 58 | |
| 59 | #ifndef CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__ |
| 60 | #define CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__ |
| 61 | |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 62 | #include <stdlib.h> |
mmentovai | 29401d2 | 2006-10-26 18:06:43 +0000 | [diff] [blame] | 63 | #include <Windows.h> |
| 64 | #include <DbgHelp.h> |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 65 | |
mmentovai | 12a5245 | 2006-10-27 19:47:21 +0000 | [diff] [blame] | 66 | #pragma warning( push ) |
| 67 | // Disable exception handler warnings. |
| 68 | #pragma warning( disable : 4530 ) |
| 69 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 70 | #include <string> |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 71 | #include <vector> |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 72 | |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 73 | #include "google_breakpad/common/minidump_format.h" |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 74 | |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 75 | namespace google_breakpad { |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 76 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 77 | using std::vector; |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 78 | using std::wstring; |
| 79 | |
| 80 | class ExceptionHandler { |
| 81 | public: |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 82 | // A callback function to run before Breakpad performs any substantial |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 83 | // processing of an exception. A FilterCallback is called before writing |
| 84 | // a minidump. context is the parameter supplied by the user as |
mmentovai | f614cb9 | 2007-01-12 16:54:10 +0000 | [diff] [blame] | 85 | // callback_context when the handler was created. exinfo points to the |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 86 | // exception record, if any; assertion points to assertion information, |
| 87 | // if any. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 88 | // |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 89 | // If a FilterCallback returns true, Breakpad will continue processing, |
| 90 | // attempting to write a minidump. If a FilterCallback returns false, Breakpad |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 91 | // will immediately report the exception as unhandled without writing a |
| 92 | // minidump, allowing another handler the opportunity to handle it. |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 93 | typedef bool (*FilterCallback)(void *context, EXCEPTION_POINTERS *exinfo, |
| 94 | MDRawAssertionInfo *assertion); |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 95 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 96 | // A callback function to run after the minidump has been written. |
| 97 | // minidump_id is a unique id for the dump, so the minidump |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 98 | // file is <dump_path>\<minidump_id>.dmp. context is the parameter supplied |
mmentovai | f614cb9 | 2007-01-12 16:54:10 +0000 | [diff] [blame] | 99 | // by the user as callback_context when the handler was created. exinfo |
| 100 | // points to the exception record, or NULL if no exception occurred. |
| 101 | // succeeded indicates whether a minidump file was successfully written. |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 102 | // assertion points to information about an assertion if the handler was |
| 103 | // invoked by an assertion. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 104 | // |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 105 | // If an exception occurred and the callback returns true, Breakpad will treat |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 106 | // the exception as fully-handled, suppressing any other handlers from being |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 107 | // notified of the exception. If the callback returns false, Breakpad will |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 108 | // treat the exception as unhandled, and allow another handler to handle it. |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 109 | // If there are no other handlers, Breakpad will report the exception to the |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 110 | // system as unhandled, allowing a debugger or native crash dialog the |
| 111 | // opportunity to handle the exception. Most callback implementations |
| 112 | // should normally return the value of |succeeded|, or when they wish to |
| 113 | // not report an exception of handled, false. Callbacks will rarely want to |
| 114 | // return true directly (unless |succeeded| is true). |
| 115 | typedef bool (*MinidumpCallback)(const wchar_t *dump_path, |
| 116 | const wchar_t *minidump_id, |
| 117 | void *context, |
mmentovai | f614cb9 | 2007-01-12 16:54:10 +0000 | [diff] [blame] | 118 | EXCEPTION_POINTERS *exinfo, |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 119 | MDRawAssertionInfo *assertion, |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 120 | bool succeeded); |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 121 | |
| 122 | // Creates a new ExceptionHandler instance to handle writing minidumps. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 123 | // Before writing a minidump, the optional filter callback will be called. |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 124 | // Its return value determines whether or not Breakpad should write a minidump. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 125 | // Minidump files will be written to dump_path, and the optional callback |
| 126 | // is called after writing the dump file, as described above. |
| 127 | // If install_handler is true, then a minidump will be written whenever |
| 128 | // an unhandled exception occurs. If it is false, minidumps will only |
| 129 | // be written when WriteMinidump is called. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 130 | ExceptionHandler(const wstring &dump_path, |
| 131 | FilterCallback filter, MinidumpCallback callback, |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 132 | void *callback_context, bool install_handler); |
| 133 | ~ExceptionHandler(); |
| 134 | |
mmentovai | 1bff57e | 2006-10-27 16:10:55 +0000 | [diff] [blame] | 135 | // Get and set the minidump path. |
| 136 | wstring dump_path() const { return dump_path_; } |
mmentovai | ed61ae0 | 2006-11-28 19:47:44 +0000 | [diff] [blame] | 137 | void set_dump_path(const wstring &dump_path) { |
| 138 | dump_path_ = dump_path; |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 139 | dump_path_c_ = dump_path_.c_str(); |
mmentovai | ed61ae0 | 2006-11-28 19:47:44 +0000 | [diff] [blame] | 140 | UpdateNextID(); // Necessary to put dump_path_ in next_minidump_path_. |
| 141 | } |
mmentovai | 1bff57e | 2006-10-27 16:10:55 +0000 | [diff] [blame] | 142 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 143 | // Writes a minidump immediately. This can be used to capture the |
| 144 | // execution state independently of a crash. Returns true on success. |
| 145 | bool WriteMinidump(); |
| 146 | |
mmentovai | fb6be7c | 2007-07-02 15:36:56 +0000 | [diff] [blame^] | 147 | // Writes a minidump immediately, with the user-supplied exception |
| 148 | // information. |
| 149 | bool WriteMinidumpForException(EXCEPTION_POINTERS *exinfo); |
| 150 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 151 | // Convenience form of WriteMinidump which does not require an |
| 152 | // ExceptionHandler instance. |
| 153 | static bool WriteMinidump(const wstring &dump_path, |
| 154 | MinidumpCallback callback, void *callback_context); |
| 155 | |
| 156 | private: |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 157 | friend class AutoExceptionHandler; |
| 158 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 159 | // Function pointer type for MiniDumpWriteDump, which is looked up |
| 160 | // dynamically. |
| 161 | typedef BOOL (WINAPI *MiniDumpWriteDump_type)( |
| 162 | HANDLE hProcess, |
| 163 | DWORD dwPid, |
| 164 | HANDLE hFile, |
| 165 | MINIDUMP_TYPE DumpType, |
| 166 | CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam, |
| 167 | CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam, |
| 168 | CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam); |
| 169 | |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 170 | // Runs the main loop for the exception handler thread. |
| 171 | static DWORD WINAPI ExceptionHandlerThreadMain(void *lpParameter); |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 172 | |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 173 | // Called on the exception thread when an unhandled exception occurs. |
| 174 | // Signals the exception handler thread to handle the exception. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 175 | static LONG WINAPI HandleException(EXCEPTION_POINTERS *exinfo); |
| 176 | |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 177 | #if _MSC_VER >= 1400 // MSVC 2005/8 |
| 178 | // This function will be called by some CRT functions when they detect |
| 179 | // that they were passed an invalid parameter. Note that in _DEBUG builds, |
| 180 | // the CRT may display an assertion dialog before calling this function, |
| 181 | // and the function will not be called unless the assertion dialog is |
| 182 | // dismissed by clicking "Ignore." |
| 183 | static void HandleInvalidParameter(const wchar_t *expression, |
| 184 | const wchar_t *function, |
| 185 | const wchar_t *file, |
| 186 | unsigned int line, |
| 187 | uintptr_t reserved); |
| 188 | #endif // _MSC_VER >= 1400 |
| 189 | |
ted.mielczarek | b86e7ec | 2007-05-10 17:12:14 +0000 | [diff] [blame] | 190 | // This function will be called by the CRT when a pure virtual |
| 191 | // function is called. |
| 192 | static void HandlePureVirtualCall(); |
| 193 | |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 194 | // This is called on the exception thread or on another thread that |
| 195 | // the user wishes to produce a dump from. It calls |
| 196 | // WriteMinidumpWithException on the handler thread, avoiding stack |
| 197 | // overflows and inconsistent dumps due to writing the dump from |
| 198 | // the exception thread. If the dump is requested as a result of an |
| 199 | // exception, exinfo contains exception information, otherwise, it |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 200 | // is NULL. If the dump is requested as a result of an assertion |
| 201 | // (such as an invalid parameter being passed to a CRT function), |
| 202 | // assertion contains data about the assertion, otherwise, it is NULL. |
| 203 | bool WriteMinidumpOnHandlerThread(EXCEPTION_POINTERS *exinfo, |
| 204 | MDRawAssertionInfo *assertion); |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 205 | |
| 206 | // This function does the actual writing of a minidump. It is called |
| 207 | // on the handler thread. requesting_thread_id is the ID of the thread |
| 208 | // that requested the dump. If the dump is requested as a result of |
| 209 | // an exception, exinfo contains exception information, otherwise, |
| 210 | // it is NULL. |
| 211 | bool WriteMinidumpWithException(DWORD requesting_thread_id, |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 212 | EXCEPTION_POINTERS *exinfo, |
| 213 | MDRawAssertionInfo *assertion); |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 214 | |
mmentovai | ed61ae0 | 2006-11-28 19:47:44 +0000 | [diff] [blame] | 215 | // Generates a new ID and stores it in next_minidump_id_, and stores the |
| 216 | // path of the next minidump to be written in next_minidump_path_. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 217 | void UpdateNextID(); |
| 218 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 219 | FilterCallback filter_; |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 220 | MinidumpCallback callback_; |
| 221 | void *callback_context_; |
| 222 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 223 | // The directory in which a minidump will be written, set by the dump_path |
| 224 | // argument to the constructor, or set_dump_path. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 225 | wstring dump_path_; |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 226 | |
| 227 | // The basename of the next minidump to be written, without the extension. |
mmentovai | 29401d2 | 2006-10-26 18:06:43 +0000 | [diff] [blame] | 228 | wstring next_minidump_id_; |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 229 | |
| 230 | // The full pathname of the next minidump to be written, including the file |
| 231 | // extension. |
mmentovai | ed61ae0 | 2006-11-28 19:47:44 +0000 | [diff] [blame] | 232 | wstring next_minidump_path_; |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 233 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 234 | // Pointers to C-string representations of the above. These are set when |
| 235 | // the above wstring versions are set in order to avoid calling c_str during |
| 236 | // an exception, as c_str may attempt to allocate heap memory. These |
| 237 | // pointers are not owned by the ExceptionHandler object, but their lifetimes |
| 238 | // should be equivalent to the lifetimes of the associated wstring, provided |
| 239 | // that the wstrings are not altered. |
| 240 | const wchar_t *dump_path_c_; |
| 241 | const wchar_t *next_minidump_id_c_; |
| 242 | const wchar_t *next_minidump_path_c_; |
| 243 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 244 | HMODULE dbghelp_module_; |
| 245 | MiniDumpWriteDump_type minidump_write_dump_; |
| 246 | |
mmentovai | 65dbfcc | 2006-12-08 22:49:07 +0000 | [diff] [blame] | 247 | // True if the ExceptionHandler installed an unhandled exception filter |
| 248 | // when created (with an install_handler parameter set to true). |
| 249 | bool installed_handler_; |
| 250 | |
| 251 | // When installed_handler_ is true, previous_filter_ is the unhandled |
| 252 | // exception filter that was set prior to installing ExceptionHandler as |
| 253 | // the unhandled exception filter and pointing it to |this|. NULL indicates |
| 254 | // that there is no previous unhandled exception filter. |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 255 | LPTOP_LEVEL_EXCEPTION_FILTER previous_filter_; |
mmentovai | 65dbfcc | 2006-12-08 22:49:07 +0000 | [diff] [blame] | 256 | |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 257 | #if _MSC_VER >= 1400 // MSVC 2005/8 |
| 258 | // Beginning in VC 8, the CRT provides an invalid parameter handler that will |
| 259 | // be called when some CRT functions are passed invalid parameters. In |
| 260 | // earlier CRTs, the same conditions would cause unexpected behavior or |
| 261 | // crashes. |
| 262 | _invalid_parameter_handler previous_iph_; |
| 263 | #endif // _MSC_VER >= 1400 |
| 264 | |
ted.mielczarek | b86e7ec | 2007-05-10 17:12:14 +0000 | [diff] [blame] | 265 | // The CRT allows you to override the default handler for pure |
| 266 | // virtual function calls. |
| 267 | _purecall_handler previous_pch_; |
| 268 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 269 | // The exception handler thread. |
| 270 | HANDLE handler_thread_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 271 | |
| 272 | // The critical section enforcing the requirement that only one exception be |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 273 | // handled by a handler at a time. |
| 274 | CRITICAL_SECTION handler_critical_section_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 275 | |
| 276 | // Semaphores used to move exception handling between the exception thread |
| 277 | // and the handler thread. handler_start_semaphore_ is signalled by the |
| 278 | // exception thread to wake up the handler thread when an exception occurs. |
| 279 | // handler_finish_semaphore_ is signalled by the handler thread to wake up |
| 280 | // the exception thread when handling is complete. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 281 | HANDLE handler_start_semaphore_; |
| 282 | HANDLE handler_finish_semaphore_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 283 | |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 284 | // The next 2 fields contain data passed from the requesting thread to |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 285 | // the handler thread. |
| 286 | |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 287 | // The thread ID of the thread requesting the dump (either the exception |
| 288 | // thread or any other thread that called WriteMinidump directly). |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 289 | DWORD requesting_thread_id_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 290 | |
| 291 | // The exception info passed to the exception handler on the exception |
| 292 | // thread, if an exception occurred. NULL for user-requested dumps. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 293 | EXCEPTION_POINTERS *exception_info_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 294 | |
mmentovai | baff938 | 2007-02-07 20:20:10 +0000 | [diff] [blame] | 295 | // If the handler is invoked due to an assertion, this will contain a |
| 296 | // pointer to the assertion information. It is NULL at other times. |
| 297 | MDRawAssertionInfo *assertion_; |
| 298 | |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 299 | // The return value of the handler, passed from the handler thread back to |
| 300 | // the requesting thread. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 301 | bool handler_return_value_; |
| 302 | |
mmentovai | 65dbfcc | 2006-12-08 22:49:07 +0000 | [diff] [blame] | 303 | // A stack of ExceptionHandler objects that have installed unhandled |
| 304 | // exception filters. This vector is used by HandleException to determine |
| 305 | // which ExceptionHandler object to route an exception to. When an |
| 306 | // ExceptionHandler is created with install_handler true, it will append |
| 307 | // itself to this list. |
| 308 | static vector<ExceptionHandler *> *handler_stack_; |
| 309 | |
| 310 | // The index of the ExceptionHandler in handler_stack_ that will handle the |
| 311 | // next exception. Note that 0 means the last entry in handler_stack_, 1 |
| 312 | // means the next-to-last entry, and so on. This is used by HandleException |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 313 | // to support multiple stacked Breakpad handlers. |
mmentovai | 65dbfcc | 2006-12-08 22:49:07 +0000 | [diff] [blame] | 314 | static LONG handler_stack_index_; |
| 315 | |
| 316 | // handler_stack_critical_section_ guards operations on handler_stack_ and |
| 317 | // handler_stack_index_. |
mmentovai | 283fd39 | 2006-12-07 20:46:54 +0000 | [diff] [blame] | 318 | static CRITICAL_SECTION handler_stack_critical_section_; |
| 319 | |
| 320 | // True when handler_stack_critical_section_ has been initialized. |
| 321 | static bool handler_stack_critical_section_initialized_; |
mmentovai | b261019 | 2006-10-31 16:49:38 +0000 | [diff] [blame] | 322 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 323 | // disallow copy ctor and operator= |
| 324 | explicit ExceptionHandler(const ExceptionHandler &); |
| 325 | void operator=(const ExceptionHandler &); |
| 326 | }; |
| 327 | |
mmentovai | e5dc608 | 2007-02-14 19:51:05 +0000 | [diff] [blame] | 328 | } // namespace google_breakpad |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 329 | |
mmentovai | 12a5245 | 2006-10-27 19:47:21 +0000 | [diff] [blame] | 330 | #pragma warning( pop ) |
| 331 | |
bryner | 1217c1f | 2006-09-27 01:00:32 +0000 | [diff] [blame] | 332 | #endif // CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__ |