// Copyright 2015 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 #include "base/logging.h" #include "client/crashpad_info.h" #include "util/file/file_io.h" #include "util/win/scoped_handle.h" DWORD WINAPI LotsOfReferencesThreadProc(void* param) { LONG* count = reinterpret_cast(param); // Allocate a bunch of pointers to things on the stack. int* pointers[1000]; for (int i = 0; i < arraysize(pointers); ++i) { pointers[i] = new int[2048]; } InterlockedIncrement(count); Sleep(INFINITE); return 0; } int wmain(int argc, wchar_t* argv[]) { CHECK_EQ(argc, 2); crashpad::ScopedKernelHANDLE done(CreateEvent(nullptr, true, false, argv[1])); PCHECK(LoadLibrary(L"crashpad_snapshot_test_image_reader_module.dll")) << "LoadLibrary"; // Create threads with lots of stack pointers to memory. This is used to // verify the cap on pointed-to memory. LONG thread_ready_count = 0; crashpad::ScopedKernelHANDLE threads[100]; for (int i = 0; i < arraysize(threads); ++i) { threads[i].reset(CreateThread(nullptr, 0, &LotsOfReferencesThreadProc, reinterpret_cast(&thread_ready_count), 0, nullptr)); if (!threads[i].is_valid()) { PLOG(ERROR) << "CreateThread"; return 1; } } for (;;) { if (InterlockedCompareExchange(&thread_ready_count, thread_ready_count, arraysize(threads)) == arraysize(threads)) { // All threads have allocated their references. break; } Sleep(10); } crashpad::CrashpadInfo* crashpad_info = crashpad::CrashpadInfo::GetCrashpadInfo(); crashpad_info->set_gather_indirectly_referenced_memory( crashpad::TriState::kEnabled, 100000); // Tell the parent process we're ready to proceed. HANDLE out = GetStdHandle(STD_OUTPUT_HANDLE); PCHECK(out != INVALID_HANDLE_VALUE) << "GetStdHandle"; char c = ' '; crashpad::CheckedWriteFile(out, &c, sizeof(c)); // Parent process says we can exit. CHECK_EQ(WAIT_OBJECT_0, WaitForSingleObject(done.get(), INFINITE)); return 0; }