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https://github.com/chromium/crashpad.git
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2d87606bb5
Previously, StartHandler() launched the handler process, then connected over a pipe to register for crash handling. Instead, the initial client can create and inherit handles to the handler and pass those handle values and other data (addresses, etc.) on the command line. This should improve startup time as there's no need to synchronize with the process at startup, and allows avoiding a call to CreateProcess() directly in StartHandler(), which is important for registration for crash reporting from DllMain(). Incidentally adds new utility functions for string/number conversion and string splitting. Note: API change; UseHandler() is removed for all platforms. BUG=chromium:567850,chromium:656800 Change-Id: I1602724183cb107f805f109674c53e95841b24fd Reviewed-on: https://chromium-review.googlesource.com/400015 Reviewed-by: Mark Mentovai <mark@chromium.org>
93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
// Copyright 2015 The Crashpad Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <malloc.h>
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#include <stdlib.h>
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#include <windows.h>
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#include <winternl.h>
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#include "base/logging.h"
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#include "base/strings/stringprintf.h"
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#include "client/crashpad_client.h"
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#include "snapshot/win/process_reader_win.h"
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namespace crashpad {
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namespace {
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// We VirtualFree a region in ourselves (the stack) to confirm that the
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// exception reporter captures as much as possible in the minidump and doesn't
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// abort. __debugbreak() immediately after doing so because the process is
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// clearly in a very broken state at this point.
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bool FreeOwnStackAndBreak() {
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ProcessReaderWin process_reader;
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if (!process_reader.Initialize(GetCurrentProcess(),
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ProcessSuspensionState::kRunning)) {
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LOG(ERROR) << "ProcessReaderWin Initialize";
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return false;
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}
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const std::vector<ProcessReaderWin::Thread> threads =
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process_reader.Threads();
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if (threads.empty()) {
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LOG(ERROR) << "no threads";
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return false;
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}
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// Push the stack up a bit so that hopefully the crash handler can succeed,
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// but won't be able to read the base of the stack.
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_alloca(16384);
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// We can't succeed at MEM_RELEASEing this memory, but MEM_DECOMMIT is good
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// enough to make it inaccessible.
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if (!VirtualFree(reinterpret_cast<void*>(threads[0].stack_region_address),
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100,
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MEM_DECOMMIT)) {
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PLOG(ERROR) << "VirtualFree";
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return false;
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}
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// If the VirtualFree() succeeds, we may have already crashed. __debugbreak()
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// just to be sure.
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__debugbreak();
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return true;
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}
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int SelfDestroyingMain(int argc, wchar_t* argv[]) {
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if (argc != 2) {
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fprintf(stderr, "Usage: %ls <server_pipe_name>\n", argv[0]);
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return EXIT_FAILURE;
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}
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CrashpadClient client;
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if (!client.SetHandlerIPCPipe(argv[1])) {
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LOG(ERROR) << "SetHandler";
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return EXIT_FAILURE;
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}
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if (!FreeOwnStackAndBreak())
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return EXIT_FAILURE;
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// This will never be reached. On success, we'll have crashed above, or
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// otherwise returned before here.
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return EXIT_SUCCESS;
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}
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} // namespace
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} // namespace crashpad
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int wmain(int argc, wchar_t* argv[]) {
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return crashpad::SelfDestroyingMain(argc, argv);
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}
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