michael@0: // Copyright (c) 2006, Google Inc.
michael@0: // All rights reserved.
michael@0: //
michael@0: // Redistribution and use in source and binary forms, with or without
michael@0: // modification, are permitted provided that the following conditions are
michael@0: // met:
michael@0: //
michael@0: //     * Redistributions of source code must retain the above copyright
michael@0: // notice, this list of conditions and the following disclaimer.
michael@0: //     * Redistributions in binary form must reproduce the above
michael@0: // copyright notice, this list of conditions and the following disclaimer
michael@0: // in the documentation and/or other materials provided with the
michael@0: // distribution.
michael@0: //     * Neither the name of Google Inc. nor the names of its
michael@0: // contributors may be used to endorse or promote products derived from
michael@0: // this software without specific prior written permission.
michael@0: //
michael@0: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0: // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
michael@0: // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
michael@0: // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
michael@0: // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
michael@0: // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
michael@0: // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
michael@0: // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0: // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
michael@0: // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0: 
michael@0: // ExceptionHandler can write a minidump file when an exception occurs,
michael@0: // or when WriteMinidump() is called explicitly by your program.
michael@0: //
michael@0: // To have the exception handler write minidumps when an uncaught exception
michael@0: // (crash) occurs, you should create an instance early in the execution
michael@0: // of your program, and keep it around for the entire time you want to
michael@0: // have crash handling active (typically, until shutdown).
michael@0: //
michael@0: // If you want to write minidumps without installing the exception handler,
michael@0: // you can create an ExceptionHandler with install_handler set to false,
michael@0: // then call WriteMinidump.  You can also use this technique if you want to
michael@0: // use different minidump callbacks for different call sites.
michael@0: //
michael@0: // In either case, a callback function is called when a minidump is written,
michael@0: // which receives the unqiue id of the minidump.  The caller can use this
michael@0: // id to collect and write additional application state, and to launch an
michael@0: // external crash-reporting application.
michael@0: //
michael@0: // It is important that creation and destruction of ExceptionHandler objects
michael@0: // be nested cleanly, when using install_handler = true.
michael@0: // Avoid the following pattern:
michael@0: //   ExceptionHandler *e = new ExceptionHandler(...);
michael@0: //   ExceptionHandler *f = new ExceptionHandler(...);
michael@0: //   delete e;
michael@0: // This will put the exception filter stack into an inconsistent state.
michael@0: 
michael@0: #ifndef CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__
michael@0: #define CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__
michael@0: 
michael@0: #include <stdlib.h>
michael@0: #include <Windows.h>
michael@0: #include <DbgHelp.h>
michael@0: #include <rpc.h>
michael@0: 
michael@0: #pragma warning( push )
michael@0: // Disable exception handler warnings.
michael@0: #pragma warning( disable : 4530 )
michael@0: 
michael@0: #include <list>
michael@0: #include <string>
michael@0: #include <vector>
michael@0: 
michael@0: #include "client/windows/common/ipc_protocol.h"
michael@0: #include "client/windows/crash_generation/crash_generation_client.h"
michael@0: #include "common/scoped_ptr.h"
michael@0: #include "google_breakpad/common/minidump_format.h"
michael@0: 
michael@0: namespace google_breakpad {
michael@0: 
michael@0: using std::vector;
michael@0: using std::wstring;
michael@0: 
michael@0: // These entries store a list of memory regions that the client wants included
michael@0: // in the minidump.
michael@0: struct AppMemory {
michael@0:   ULONG64 ptr;
michael@0:   ULONG length;
michael@0: 
michael@0:   bool operator==(const struct AppMemory& other) const {
michael@0:     return ptr == other.ptr;
michael@0:   }
michael@0: 
michael@0:   bool operator==(const void* other) const {
michael@0:     return ptr == reinterpret_cast<ULONG64>(other);
michael@0:   }
michael@0: };
michael@0: typedef std::list<AppMemory> AppMemoryList;
michael@0: 
michael@0: class ExceptionHandler {
michael@0:  public:
michael@0:   // A callback function to run before Breakpad performs any substantial
michael@0:   // processing of an exception.  A FilterCallback is called before writing
michael@0:   // a minidump.  context is the parameter supplied by the user as
michael@0:   // callback_context when the handler was created.  exinfo points to the
michael@0:   // exception record, if any; assertion points to assertion information,
michael@0:   // if any.
michael@0:   //
michael@0:   // If a FilterCallback returns true, Breakpad will continue processing,
michael@0:   // attempting to write a minidump.  If a FilterCallback returns false,
michael@0:   // Breakpad will immediately report the exception as unhandled without
michael@0:   // writing a minidump, allowing another handler the opportunity to handle it.
michael@0:   typedef bool (*FilterCallback)(void* context, EXCEPTION_POINTERS* exinfo,
michael@0:                                  MDRawAssertionInfo* assertion);
michael@0: 
michael@0:   // A callback function to run after the minidump has been written.
michael@0:   // minidump_id is a unique id for the dump, so the minidump
michael@0:   // file is <dump_path>\<minidump_id>.dmp.  context is the parameter supplied
michael@0:   // by the user as callback_context when the handler was created.  exinfo
michael@0:   // points to the exception record, or NULL if no exception occurred.
michael@0:   // succeeded indicates whether a minidump file was successfully written.
michael@0:   // assertion points to information about an assertion if the handler was
michael@0:   // invoked by an assertion.
michael@0:   //
michael@0:   // If an exception occurred and the callback returns true, Breakpad will treat
michael@0:   // the exception as fully-handled, suppressing any other handlers from being
michael@0:   // notified of the exception.  If the callback returns false, Breakpad will
michael@0:   // treat the exception as unhandled, and allow another handler to handle it.
michael@0:   // If there are no other handlers, Breakpad will report the exception to the
michael@0:   // system as unhandled, allowing a debugger or native crash dialog the
michael@0:   // opportunity to handle the exception.  Most callback implementations
michael@0:   // should normally return the value of |succeeded|, or when they wish to
michael@0:   // not report an exception of handled, false.  Callbacks will rarely want to
michael@0:   // return true directly (unless |succeeded| is true).
michael@0:   //
michael@0:   // For out-of-process dump generation, dump path and minidump ID will always
michael@0:   // be NULL. In case of out-of-process dump generation, the dump path and
michael@0:   // minidump id are controlled by the server process and are not communicated
michael@0:   // back to the crashing process.
michael@0:   typedef bool (*MinidumpCallback)(const wchar_t* dump_path,
michael@0:                                    const wchar_t* minidump_id,
michael@0:                                    void* context,
michael@0:                                    EXCEPTION_POINTERS* exinfo,
michael@0:                                    MDRawAssertionInfo* assertion,
michael@0:                                    bool succeeded);
michael@0: 
michael@0:   // HandlerType specifies which types of handlers should be installed, if
michael@0:   // any.  Use HANDLER_NONE for an ExceptionHandler that remains idle,
michael@0:   // without catching any failures on its own.  This type of handler may
michael@0:   // still be triggered by calling WriteMinidump.  Otherwise, use a
michael@0:   // combination of the other HANDLER_ values, or HANDLER_ALL to install
michael@0:   // all handlers.
michael@0:   enum HandlerType {
michael@0:     HANDLER_NONE = 0,
michael@0:     HANDLER_EXCEPTION = 1 << 0,          // SetUnhandledExceptionFilter
michael@0:     HANDLER_INVALID_PARAMETER = 1 << 1,  // _set_invalid_parameter_handler
michael@0:     HANDLER_PURECALL = 1 << 2,           // _set_purecall_handler
michael@0:     HANDLER_ALL = HANDLER_EXCEPTION |
michael@0:                   HANDLER_INVALID_PARAMETER |
michael@0:                   HANDLER_PURECALL
michael@0:   };
michael@0: 
michael@0:   // Creates a new ExceptionHandler instance to handle writing minidumps.
michael@0:   // Before writing a minidump, the optional filter callback will be called.
michael@0:   // Its return value determines whether or not Breakpad should write a
michael@0:   // minidump.  Minidump files will be written to dump_path, and the optional
michael@0:   // callback is called after writing the dump file, as described above.
michael@0:   // handler_types specifies the types of handlers that should be installed.
michael@0:   ExceptionHandler(const wstring& dump_path,
michael@0:                    FilterCallback filter,
michael@0:                    MinidumpCallback callback,
michael@0:                    void* callback_context,
michael@0:                    int handler_types);
michael@0: 
michael@0:   // Creates a new ExceptionHandler instance that can attempt to perform
michael@0:   // out-of-process dump generation if pipe_name is not NULL. If pipe_name is
michael@0:   // NULL, or if out-of-process dump generation registration step fails,
michael@0:   // in-process dump generation will be used. This also allows specifying
michael@0:   // the dump type to generate.
michael@0:   ExceptionHandler(const wstring& dump_path,
michael@0:                    FilterCallback filter,
michael@0:                    MinidumpCallback callback,
michael@0:                    void* callback_context,
michael@0:                    int handler_types,
michael@0:                    MINIDUMP_TYPE dump_type,
michael@0:                    const wchar_t* pipe_name,
michael@0:                    const CustomClientInfo* custom_info);
michael@0: 
michael@0:   // As above, creates a new ExceptionHandler instance to perform
michael@0:   // out-of-process dump generation if the given pipe_handle is not NULL.
michael@0:   ExceptionHandler(const wstring& dump_path,
michael@0:                    FilterCallback filter,
michael@0:                    MinidumpCallback callback,
michael@0:                    void* callback_context,
michael@0:                    int handler_types,
michael@0:                    MINIDUMP_TYPE dump_type,
michael@0:                    HANDLE pipe_handle,
michael@0:                    const CustomClientInfo* custom_info);
michael@0: 
michael@0:   ~ExceptionHandler();
michael@0: 
michael@0:   // Get and set the minidump path.
michael@0:   wstring dump_path() const { return dump_path_; }
michael@0:   void set_dump_path(const wstring &dump_path) {
michael@0:     dump_path_ = dump_path;
michael@0:     dump_path_c_ = dump_path_.c_str();
michael@0:     UpdateNextID();  // Necessary to put dump_path_ in next_minidump_path_.
michael@0:   }
michael@0: 
michael@0:   // Requests that a previously reported crash be uploaded.
michael@0:   bool RequestUpload(DWORD crash_id);
michael@0: 
michael@0:   // Writes a minidump immediately.  This can be used to capture the
michael@0:   // execution state independently of a crash.  Returns true on success.
michael@0:   bool WriteMinidump();
michael@0: 
michael@0:   // Writes a minidump immediately, with the user-supplied exception
michael@0:   // information.
michael@0:   bool WriteMinidumpForException(EXCEPTION_POINTERS* exinfo);
michael@0: 
michael@0:   // Convenience form of WriteMinidump which does not require an
michael@0:   // ExceptionHandler instance.
michael@0:   static bool WriteMinidump(const wstring &dump_path,
michael@0:                             MinidumpCallback callback, void* callback_context);
michael@0: 
michael@0:   // Write a minidump of |child| immediately.  This can be used to
michael@0:   // capture the execution state of |child| independently of a crash.
michael@0:   // Pass a meaningful |child_blamed_thread| to make that thread in
michael@0:   // the child process the one from which a crash signature is
michael@0:   // extracted.
michael@0:   static bool WriteMinidumpForChild(HANDLE child,
michael@0:                                     DWORD child_blamed_thread,
michael@0:                                     const wstring& dump_path,
michael@0:                                     MinidumpCallback callback,
michael@0:                                     void* callback_context);
michael@0: 
michael@0:   // Get the thread ID of the thread requesting the dump (either the exception
michael@0:   // thread or any other thread that called WriteMinidump directly).  This
michael@0:   // may be useful if you want to include additional thread state in your
michael@0:   // dumps.
michael@0:   DWORD get_requesting_thread_id() const { return requesting_thread_id_; }
michael@0: 
michael@0:   // Controls behavior of EXCEPTION_BREAKPOINT and EXCEPTION_SINGLE_STEP.
michael@0:   bool get_handle_debug_exceptions() const { return handle_debug_exceptions_; }
michael@0:   void set_handle_debug_exceptions(bool handle_debug_exceptions) {
michael@0:     handle_debug_exceptions_ = handle_debug_exceptions;
michael@0:   }
michael@0: 
michael@0:   // Returns whether out-of-process dump generation is used or not.
michael@0:   bool IsOutOfProcess() const { return crash_generation_client_.get() != NULL; }
michael@0: 
michael@0:   // Calling RegisterAppMemory(p, len) causes len bytes starting
michael@0:   // at address p to be copied to the minidump when a crash happens.
michael@0:   void RegisterAppMemory(void* ptr, size_t length);
michael@0:   void UnregisterAppMemory(void* ptr);
michael@0: 
michael@0:  private:
michael@0:   friend class AutoExceptionHandler;
michael@0: 
michael@0:   // Initializes the instance with given values.
michael@0:   void Initialize(const wstring& dump_path,
michael@0:                   FilterCallback filter,
michael@0:                   MinidumpCallback callback,
michael@0:                   void* callback_context,
michael@0:                   int handler_types,
michael@0:                   MINIDUMP_TYPE dump_type,
michael@0:                   const wchar_t* pipe_name,
michael@0:                   HANDLE pipe_handle,
michael@0:                   const CustomClientInfo* custom_info);
michael@0: 
michael@0:   // Function pointer type for MiniDumpWriteDump, which is looked up
michael@0:   // dynamically.
michael@0:   typedef BOOL (WINAPI *MiniDumpWriteDump_type)(
michael@0:       HANDLE hProcess,
michael@0:       DWORD dwPid,
michael@0:       HANDLE hFile,
michael@0:       MINIDUMP_TYPE DumpType,
michael@0:       CONST PMINIDUMP_EXCEPTION_INFORMATION ExceptionParam,
michael@0:       CONST PMINIDUMP_USER_STREAM_INFORMATION UserStreamParam,
michael@0:       CONST PMINIDUMP_CALLBACK_INFORMATION CallbackParam);
michael@0: 
michael@0:   // Function pointer type for UuidCreate, which is looked up dynamically.
michael@0:   typedef RPC_STATUS (RPC_ENTRY *UuidCreate_type)(UUID* Uuid);
michael@0: 
michael@0:   // Runs the main loop for the exception handler thread.
michael@0:   static DWORD WINAPI ExceptionHandlerThreadMain(void* lpParameter);
michael@0: 
michael@0:   // Called on the exception thread when an unhandled exception occurs.
michael@0:   // Signals the exception handler thread to handle the exception.
michael@0:   static LONG WINAPI HandleException(EXCEPTION_POINTERS* exinfo);
michael@0: 
michael@0: #if _MSC_VER >= 1400  // MSVC 2005/8
michael@0:   // This function will be called by some CRT functions when they detect
michael@0:   // that they were passed an invalid parameter.  Note that in _DEBUG builds,
michael@0:   // the CRT may display an assertion dialog before calling this function,
michael@0:   // and the function will not be called unless the assertion dialog is
michael@0:   // dismissed by clicking "Ignore."
michael@0:   static void HandleInvalidParameter(const wchar_t* expression,
michael@0:                                      const wchar_t* function,
michael@0:                                      const wchar_t* file,
michael@0:                                      unsigned int line,
michael@0:                                      uintptr_t reserved);
michael@0: #endif  // _MSC_VER >= 1400
michael@0: 
michael@0:   // This function will be called by the CRT when a pure virtual
michael@0:   // function is called.
michael@0:   static void HandlePureVirtualCall();
michael@0: 
michael@0:   // This is called on the exception thread or on another thread that
michael@0:   // the user wishes to produce a dump from.  It calls
michael@0:   // WriteMinidumpWithException on the handler thread, avoiding stack
michael@0:   // overflows and inconsistent dumps due to writing the dump from
michael@0:   // the exception thread.  If the dump is requested as a result of an
michael@0:   // exception, exinfo contains exception information, otherwise, it
michael@0:   // is NULL.  If the dump is requested as a result of an assertion
michael@0:   // (such as an invalid parameter being passed to a CRT function),
michael@0:   // assertion contains data about the assertion, otherwise, it is NULL.
michael@0:   bool WriteMinidumpOnHandlerThread(EXCEPTION_POINTERS* exinfo,
michael@0:                                     MDRawAssertionInfo* assertion);
michael@0: 
michael@0:   // This function is called on the handler thread.  It calls into
michael@0:   // WriteMinidumpWithExceptionForProcess() with a handle to the
michael@0:   // current process.  requesting_thread_id is the ID of the thread
michael@0:   // that requested the dump.  If the dump is requested as a result of
michael@0:   // an exception, exinfo contains exception information, otherwise,
michael@0:   // it is NULL.
michael@0:   bool WriteMinidumpWithException(DWORD requesting_thread_id,
michael@0:                                   EXCEPTION_POINTERS* exinfo,
michael@0:                                   MDRawAssertionInfo* assertion);
michael@0: 
michael@0:   // This function is used as a callback when calling MinidumpWriteDump,
michael@0:   // in order to add additional memory regions to the dump.
michael@0:   static BOOL CALLBACK MinidumpWriteDumpCallback(
michael@0:       PVOID context,
michael@0:       const PMINIDUMP_CALLBACK_INPUT callback_input,
michael@0:       PMINIDUMP_CALLBACK_OUTPUT callback_output);
michael@0: 
michael@0:   // This function does the actual writing of a minidump.  It is
michael@0:   // called on the handler thread.  requesting_thread_id is the ID of
michael@0:   // the thread that requested the dump, if that information is
michael@0:   // meaningful.  If the dump is requested as a result of an
michael@0:   // exception, exinfo contains exception information, otherwise, it
michael@0:   // is NULL.  process is the one that will be dumped.  If
michael@0:   // requesting_thread_id is meaningful and should be added to the
michael@0:   // minidump, write_requester_stream is |true|.
michael@0:   bool WriteMinidumpWithExceptionForProcess(DWORD requesting_thread_id,
michael@0:                                             EXCEPTION_POINTERS* exinfo,
michael@0:                                             MDRawAssertionInfo* assertion,
michael@0:                                             HANDLE process,
michael@0:                                             bool write_requester_stream);
michael@0: 
michael@0:   // Generates a new ID and stores it in next_minidump_id_, and stores the
michael@0:   // path of the next minidump to be written in next_minidump_path_.
michael@0:   void UpdateNextID();
michael@0: 
michael@0:   FilterCallback filter_;
michael@0:   MinidumpCallback callback_;
michael@0:   void* callback_context_;
michael@0: 
michael@0:   scoped_ptr<CrashGenerationClient> crash_generation_client_;
michael@0: 
michael@0:   // The directory in which a minidump will be written, set by the dump_path
michael@0:   // argument to the constructor, or set_dump_path.
michael@0:   wstring dump_path_;
michael@0: 
michael@0:   // The basename of the next minidump to be written, without the extension.
michael@0:   wstring next_minidump_id_;
michael@0: 
michael@0:   // The full pathname of the next minidump to be written, including the file
michael@0:   // extension.
michael@0:   wstring next_minidump_path_;
michael@0: 
michael@0:   // Pointers to C-string representations of the above.  These are set when
michael@0:   // the above wstring versions are set in order to avoid calling c_str during
michael@0:   // an exception, as c_str may attempt to allocate heap memory.  These
michael@0:   // pointers are not owned by the ExceptionHandler object, but their lifetimes
michael@0:   // should be equivalent to the lifetimes of the associated wstring, provided
michael@0:   // that the wstrings are not altered.
michael@0:   const wchar_t* dump_path_c_;
michael@0:   const wchar_t* next_minidump_id_c_;
michael@0:   const wchar_t* next_minidump_path_c_;
michael@0: 
michael@0:   HMODULE dbghelp_module_;
michael@0:   MiniDumpWriteDump_type minidump_write_dump_;
michael@0:   MINIDUMP_TYPE dump_type_;
michael@0: 
michael@0:   HMODULE rpcrt4_module_;
michael@0:   UuidCreate_type uuid_create_;
michael@0: 
michael@0:   // Tracks the handler types that were installed according to the
michael@0:   // handler_types constructor argument.
michael@0:   int handler_types_;
michael@0: 
michael@0:   // When installed_handler_ is true, previous_filter_ is the unhandled
michael@0:   // exception filter that was set prior to installing ExceptionHandler as
michael@0:   // the unhandled exception filter and pointing it to |this|.  NULL indicates
michael@0:   // that there is no previous unhandled exception filter.
michael@0:   LPTOP_LEVEL_EXCEPTION_FILTER previous_filter_;
michael@0: 
michael@0: #if _MSC_VER >= 1400  // MSVC 2005/8
michael@0:   // Beginning in VC 8, the CRT provides an invalid parameter handler that will
michael@0:   // be called when some CRT functions are passed invalid parameters.  In
michael@0:   // earlier CRTs, the same conditions would cause unexpected behavior or
michael@0:   // crashes.
michael@0:   _invalid_parameter_handler previous_iph_;
michael@0: #endif  // _MSC_VER >= 1400
michael@0: 
michael@0:   // The CRT allows you to override the default handler for pure
michael@0:   // virtual function calls.
michael@0:   _purecall_handler previous_pch_;
michael@0: 
michael@0:   // The exception handler thread.
michael@0:   HANDLE handler_thread_;
michael@0: 
michael@0:   // True if the exception handler is being destroyed.
michael@0:   // Starting with MSVC 2005, Visual C has stronger guarantees on volatile vars.
michael@0:   // It has release semantics on write and acquire semantics on reads.
michael@0:   // See the msdn documentation.
michael@0:   volatile bool is_shutdown_;
michael@0: 
michael@0:   // The critical section enforcing the requirement that only one exception be
michael@0:   // handled by a handler at a time.
michael@0:   CRITICAL_SECTION handler_critical_section_;
michael@0: 
michael@0:   // Semaphores used to move exception handling between the exception thread
michael@0:   // and the handler thread.  handler_start_semaphore_ is signalled by the
michael@0:   // exception thread to wake up the handler thread when an exception occurs.
michael@0:   // handler_finish_semaphore_ is signalled by the handler thread to wake up
michael@0:   // the exception thread when handling is complete.
michael@0:   HANDLE handler_start_semaphore_;
michael@0:   HANDLE handler_finish_semaphore_;
michael@0: 
michael@0:   // The next 2 fields contain data passed from the requesting thread to
michael@0:   // the handler thread.
michael@0: 
michael@0:   // The thread ID of the thread requesting the dump (either the exception
michael@0:   // thread or any other thread that called WriteMinidump directly).
michael@0:   DWORD requesting_thread_id_;
michael@0: 
michael@0:   // The exception info passed to the exception handler on the exception
michael@0:   // thread, if an exception occurred.  NULL for user-requested dumps.
michael@0:   EXCEPTION_POINTERS* exception_info_;
michael@0: 
michael@0:   // If the handler is invoked due to an assertion, this will contain a
michael@0:   // pointer to the assertion information.  It is NULL at other times.
michael@0:   MDRawAssertionInfo* assertion_;
michael@0: 
michael@0:   // The return value of the handler, passed from the handler thread back to
michael@0:   // the requesting thread.
michael@0:   bool handler_return_value_;
michael@0: 
michael@0:   // If true, the handler will intercept EXCEPTION_BREAKPOINT and
michael@0:   // EXCEPTION_SINGLE_STEP exceptions.  Leave this false (the default)
michael@0:   // to not interfere with debuggers.
michael@0:   bool handle_debug_exceptions_;
michael@0: 
michael@0:   // Callers can request additional memory regions to be included in
michael@0:   // the dump.
michael@0:   AppMemoryList app_memory_info_;
michael@0: 
michael@0:   // A stack of ExceptionHandler objects that have installed unhandled
michael@0:   // exception filters.  This vector is used by HandleException to determine
michael@0:   // which ExceptionHandler object to route an exception to.  When an
michael@0:   // ExceptionHandler is created with install_handler true, it will append
michael@0:   // itself to this list.
michael@0:   static vector<ExceptionHandler*>* handler_stack_;
michael@0: 
michael@0:   // The index of the ExceptionHandler in handler_stack_ that will handle the
michael@0:   // next exception.  Note that 0 means the last entry in handler_stack_, 1
michael@0:   // means the next-to-last entry, and so on.  This is used by HandleException
michael@0:   // to support multiple stacked Breakpad handlers.
michael@0:   static LONG handler_stack_index_;
michael@0: 
michael@0:   // handler_stack_critical_section_ guards operations on handler_stack_ and
michael@0:   // handler_stack_index_. The critical section is initialized by the
michael@0:   // first instance of the class and destroyed by the last instance of it.
michael@0:   static CRITICAL_SECTION handler_stack_critical_section_;
michael@0: 
michael@0:   // The number of instances of this class.
michael@0:   volatile static LONG instance_count_;
michael@0: 
michael@0:   // disallow copy ctor and operator=
michael@0:   explicit ExceptionHandler(const ExceptionHandler &);
michael@0:   void operator=(const ExceptionHandler &);
michael@0: };
michael@0: 
michael@0: }  // namespace google_breakpad
michael@0: 
michael@0: #pragma warning( pop )
michael@0: 
michael@0: #endif  // CLIENT_WINDOWS_HANDLER_EXCEPTION_HANDLER_H__