blob: aff3ae28e667deae3e75bb6ed81e1afe0f32c0cf [file] [log] [blame]
// Copyright 2016 The Crashpad Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdio.h>
#include <windows.h>
#include <iterator>
#include "base/debug/alias.h"
#include "base/logging.h"
#include "base/notreached.h"
#include "base/strings/stringprintf.h"
#include "base/strings/utf_string_conversions.h"
#include "client/crashpad_client.h"
#include "client/crashpad_info.h"
namespace {
DWORD WINAPI Thread1(LPVOID context) {
HANDLE event = context;
// Increase the thread priority as a hacky way to signal to
// crash_other_program.exe that this is the thread to dump.
PCHECK(SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL));
// Let the main thread proceed.
PCHECK(SetEvent(event));
Sleep(INFINITE);
NOTREACHED();
return 0;
}
DWORD WINAPI Thread2(LPVOID dummy) {
Sleep(INFINITE);
NOTREACHED();
return 0;
}
DWORD WINAPI Thread3(LPVOID context) {
// This is a convenient way to pass the event handle to loader_lock_dll.dll.
HANDLE event = context;
PCHECK(SetEnvironmentVariable(
L"CRASHPAD_TEST_DLL_EVENT",
base::UTF8ToWide(base::StringPrintf("%p", event)).c_str()));
HMODULE dll = LoadLibrary(L"loader_lock_dll.dll");
if (!dll)
PLOG(FATAL) << "LoadLibrary";
// This call is not expected to return.
if (!FreeLibrary(dll))
PLOG(FATAL) << "FreeLibrary";
NOTREACHED();
return 0;
}
} // namespace
int wmain(int argc, wchar_t* argv[]) {
crashpad::CrashpadClient client;
if (argc == 2) {
if (!client.SetHandlerIPCPipe(argv[1])) {
LOG(ERROR) << "SetHandlerIPCPipe";
return EXIT_FAILURE;
}
} else {
fprintf(stderr, "Usage: %ls <server_pipe_name>\n", argv[0]);
return EXIT_FAILURE;
}
// Make sure this module has a CrashpadInfo structure.
crashpad::CrashpadInfo* crashpad_info =
crashpad::CrashpadInfo::GetCrashpadInfo();
base::debug::Alias(crashpad_info);
HANDLE event = CreateEvent(nullptr,
false, // bManualReset
false,
nullptr);
if (!event) {
PLOG(ERROR) << "CreateEvent";
return EXIT_FAILURE;
}
HANDLE threads[3];
threads[0] = CreateThread(nullptr, 0, Thread1, event, 0, nullptr);
threads[1] = CreateThread(nullptr, 0, Thread2, nullptr, 0, nullptr);
// Wait for Thread1() to complete its work and reach its Sleep() before
// starting the next thread, which will hold the loader lock and potentially
// block any further progress.
if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0) {
PLOG(ERROR) << "WaitForSingleObject";
return EXIT_FAILURE;
}
// Use the same event object, which was automatically reset.
threads[2] = CreateThread(nullptr, 0, Thread3, event, 0, nullptr);
// Wait for loader_lock_dll.dll to signal that the loader lock is held and
// won’t be released.
if (WaitForSingleObject(event, INFINITE) != WAIT_OBJECT_0) {
PLOG(ERROR) << "WaitForSingleObject";
return EXIT_FAILURE;
}
// Signal to the parent that everything is ready.
fprintf(stdout, " ");
fflush(stdout);
// This is not expected to return.
DWORD count = WaitForMultipleObjects(
static_cast<DWORD>(std::size(threads)), threads, true, INFINITE);
if (count == WAIT_FAILED) {
PLOG(ERROR) << "WaitForMultipleObjects";
} else {
LOG(ERROR) << "WaitForMultipleObjects: " << count;
}
return EXIT_FAILURE;
}