| // 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 "util/win/scoped_process_suspend.h" |
| |
| #include <tlhelp32.h> |
| |
| #include <algorithm> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "gtest/gtest.h" |
| #include "test/errors.h" |
| #include "test/win/win_child_process.h" |
| #include "util/win/xp_compat.h" |
| |
| namespace crashpad { |
| namespace test { |
| namespace { |
| |
| // There is no per-process suspend count on Windows, only a per-thread suspend |
| // count. NtSuspendProcess just suspends all threads of a given process. So, |
| // verify that all thread's suspend counts match the desired suspend count. |
| bool SuspendCountMatches(HANDLE process, DWORD desired_suspend_count) { |
| DWORD process_id = GetProcessId(process); |
| |
| ScopedKernelHANDLE snapshot(CreateToolhelp32Snapshot(TH32CS_SNAPTHREAD, 0)); |
| if (!snapshot.is_valid()) { |
| ADD_FAILURE() << ErrorMessage("CreateToolhelp32Snapshot"); |
| return false; |
| } |
| |
| THREADENTRY32 te; |
| te.dwSize = sizeof(te); |
| |
| BOOL ret = Thread32First(snapshot.get(), &te); |
| if (!ret) { |
| ADD_FAILURE() << ErrorMessage("Thread32First"); |
| return false; |
| } |
| do { |
| if (te.dwSize >= offsetof(THREADENTRY32, th32OwnerProcessID) + |
| sizeof(te.th32OwnerProcessID) && |
| te.th32OwnerProcessID == process_id) { |
| ScopedKernelHANDLE thread( |
| OpenThread(kXPThreadAllAccess, false, te.th32ThreadID)); |
| EXPECT_TRUE(thread.is_valid()) << ErrorMessage("OpenThread"); |
| DWORD result = SuspendThread(thread.get()); |
| EXPECT_NE(result, static_cast<DWORD>(-1)) |
| << ErrorMessage("SuspendThread"); |
| if (result != static_cast<DWORD>(-1)) { |
| EXPECT_NE(ResumeThread(thread.get()), static_cast<DWORD>(-1)) |
| << ErrorMessage("ResumeThread"); |
| } |
| if (result != desired_suspend_count) |
| return false; |
| } |
| te.dwSize = sizeof(te); |
| } while (Thread32Next(snapshot.get(), &te)); |
| |
| return true; |
| } |
| |
| class ScopedProcessSuspendTest final : public WinChildProcess { |
| public: |
| ScopedProcessSuspendTest() : WinChildProcess() {} |
| ~ScopedProcessSuspendTest() {} |
| |
| private: |
| int Run() override { |
| char c; |
| // Wait for notification from parent. |
| EXPECT_TRUE(LoggingReadFile(ReadPipeHandle(), &c, sizeof(c))); |
| EXPECT_EQ(' ', c); |
| return EXIT_SUCCESS; |
| } |
| |
| DISALLOW_COPY_AND_ASSIGN(ScopedProcessSuspendTest); |
| }; |
| |
| TEST(ScopedProcessSuspend, ScopedProcessSuspend) { |
| WinChildProcess::EntryPoint<ScopedProcessSuspendTest>(); |
| scoped_ptr<WinChildProcess::Handles> handles = WinChildProcess::Launch(); |
| |
| EXPECT_TRUE(SuspendCountMatches(handles->process.get(), 0)); |
| |
| { |
| ScopedProcessSuspend suspend0(handles->process.get()); |
| EXPECT_TRUE(SuspendCountMatches(handles->process.get(), 1)); |
| |
| { |
| ScopedProcessSuspend suspend1(handles->process.get()); |
| EXPECT_TRUE(SuspendCountMatches(handles->process.get(), 2)); |
| } |
| |
| EXPECT_TRUE(SuspendCountMatches(handles->process.get(), 1)); |
| } |
| |
| EXPECT_TRUE(SuspendCountMatches(handles->process.get(), 0)); |
| |
| // Tell the child it's OK to terminate. |
| char c = ' '; |
| EXPECT_TRUE(WriteFile(handles->write.get(), &c, sizeof(c))); |
| } |
| |
| } // namespace |
| } // namespace test |
| } // namespace crashpad |