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// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include <ObjBase.h>
#include <cstdio>
#include "client/windows/handler/exception_handler.h"
#include "common/windows/guid_string.h"
namespace google_airbag {
ExceptionHandler *ExceptionHandler::current_handler_ = NULL;
ExceptionHandler::ExceptionHandler(const wstring &dump_path,
MinidumpCallback callback,
void *callback_context,
bool install_handler)
: callback_(callback), callback_context_(callback_context),
dump_path_(dump_path), dbghelp_module_(NULL),
minidump_write_dump_(NULL), previous_handler_(current_handler_),
previous_filter_(NULL) {
UpdateNextID();
dbghelp_module_ = LoadLibrary(L"dbghelp.dll");
if (dbghelp_module_) {
minidump_write_dump_ = reinterpret_cast<MiniDumpWriteDump_type>(
GetProcAddress(dbghelp_module_, "MiniDumpWriteDump"));
}
if (install_handler) {
previous_filter_ = SetUnhandledExceptionFilter(HandleException);
current_handler_ = this;
}
}
ExceptionHandler::~ExceptionHandler() {
if (dbghelp_module_) {
FreeLibrary(dbghelp_module_);
}
if (current_handler_ == this) {
SetUnhandledExceptionFilter(previous_filter_);
current_handler_ = previous_handler_;
}
}
// static
LONG ExceptionHandler::HandleException(EXCEPTION_POINTERS *exinfo) {
if (!current_handler_->WriteMinidumpWithException(exinfo)) {
return EXCEPTION_CONTINUE_SEARCH;
}
return EXCEPTION_EXECUTE_HANDLER;
}
bool ExceptionHandler::WriteMinidump() {
bool success = WriteMinidumpWithException(NULL);
UpdateNextID();
return success;
}
// static
bool ExceptionHandler::WriteMinidump(const wstring &dump_path,
MinidumpCallback callback,
void *callback_context) {
ExceptionHandler handler(dump_path, callback, callback_context, false);
return handler.WriteMinidump();
}
bool ExceptionHandler::WriteMinidumpWithException(EXCEPTION_POINTERS *exinfo) {
wchar_t dump_file_name[MAX_PATH];
swprintf_s(dump_file_name, MAX_PATH, L"%s\\%s.dmp",
dump_path_.c_str(), next_minidump_id_.c_str());
bool success = false;
if (minidump_write_dump_) {
HANDLE dump_file = CreateFile(dump_file_name,
GENERIC_WRITE,
FILE_SHARE_WRITE,
NULL,
CREATE_ALWAYS,
FILE_ATTRIBUTE_NORMAL,
NULL);
if (dump_file != INVALID_HANDLE_VALUE) {
MINIDUMP_EXCEPTION_INFORMATION except_info;
except_info.ThreadId = GetCurrentThreadId();
except_info.ExceptionPointers = exinfo;
except_info.ClientPointers = FALSE;
// The explicit comparison to TRUE avoids a warning (C4800).
success = (minidump_write_dump_(GetCurrentProcess(),
GetCurrentProcessId(),
dump_file,
MiniDumpNormal,
&except_info,
NULL,
NULL) == TRUE);
CloseHandle(dump_file);
}
}
if (callback_) {
callback_(next_minidump_id_, callback_context_, success);
}
// TODO(bryner): log an error on failure
return success;
}
void ExceptionHandler::UpdateNextID() {
GUID id;
CoCreateGuid(&id);
next_minidump_id_ = GUIDString::GUIDToWString(&id);
}
} // namespace google_airbag
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