win: Crash handler server

util/win/exception_handler_server_test.cc

+// 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/exception_handler_server.h"
+
+#include <windows.h>
+
+#include <string>
+#include <vector>
+
+#include "base/basictypes.h"
+#include "base/strings/stringprintf.h"
+#include "client/crashpad_client.h"
+#include "gtest/gtest.h"
+#include "test/win/win_child_process.h"
+#include "util/thread/thread.h"
+#include "util/win/address_types.h"
+#include "util/win/registration_protocol_win.h"
+#include "util/win/scoped_handle.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+// Runs the ExceptionHandlerServer on a background thread.
+class RunServerThread : public Thread {
+ public:
+  // Instantiates a thread which will invoke server->Run(pipe_name).
+  RunServerThread(ExceptionHandlerServer* server, const std::string& pipe_name)
+      : server_(server), pipe_name_(pipe_name) {}
+  ~RunServerThread() override {}
+
+ private:
+  // Thread:
+  void ThreadMain() override { server_->Run(pipe_name_); }
+
+  ExceptionHandlerServer* server_;
+  std::string pipe_name_;
+
+  DISALLOW_COPY_AND_ASSIGN(RunServerThread);
+};
+
+class TestDelegate : public ExceptionHandlerServer::Delegate {
+ public:
+  explicit TestDelegate(HANDLE server_ready) : server_ready_(server_ready) {}
+  ~TestDelegate() override {}
+
+  void ExceptionHandlerServerStarted() override {
+    SetEvent(server_ready_);
+  }
+  unsigned int ExceptionHandlerServerException(
+      HANDLE process,
+      WinVMAddress exception_information_address) override {
+    return 0;
+  }
+
+  void WaitForStart() { WaitForSingleObject(server_ready_, INFINITE); }
+
+ private:
+  HANDLE server_ready_;  // weak
+  bool started_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestDelegate);
+};
+
+class ExceptionHandlerServerTest : public testing::Test {
+ public:
+  ExceptionHandlerServerTest()
+      : pipe_name_("\\\\.\\pipe\\exception_handler_server_test_pipe_" +
+                   base::StringPrintf("%08x", GetCurrentProcessId())),
+        server_ready_(CreateEvent(nullptr, false, false, nullptr)),
+        delegate_(server_ready_.get()),
+        server_(&delegate_),
+        server_thread_(&server_, pipe_name_) {}
+
+  TestDelegate& delegate() { return delegate_; }
+  ExceptionHandlerServer& server() { return server_; }
+  Thread& server_thread() { return server_thread_; }
+  const std::string& pipe_name() const { return pipe_name_; }
+
+ private:
+  std::string pipe_name_;
+  ScopedKernelHANDLE server_ready_;
+  TestDelegate delegate_;
+  ExceptionHandlerServer server_;
+  RunServerThread server_thread_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExceptionHandlerServerTest);
+};
+
+// During destruction, ensures that the server is stopped and the background
+// thread joined.
+class ScopedStopServerAndJoinThread {
+ public:
+  ScopedStopServerAndJoinThread(ExceptionHandlerServer* server, Thread* thread)
+      : server_(server), thread_(thread) {}
+  ~ScopedStopServerAndJoinThread() {
+    server_->Stop();
+    thread_->Join();
+  }
+
+ private:
+  ExceptionHandlerServer* server_;
+  Thread* thread_;
+  DISALLOW_COPY_AND_ASSIGN(ScopedStopServerAndJoinThread);
+};
+
+TEST_F(ExceptionHandlerServerTest, Instantiate) {
+}
+
+TEST_F(ExceptionHandlerServerTest, StartAndStop) {
+  server_thread().Start();
+  ScopedStopServerAndJoinThread scoped_stop_server_and_join_thread(
+      &server(), &server_thread());
+  ASSERT_NO_FATAL_FAILURE(delegate().WaitForStart());
+}
+
+TEST_F(ExceptionHandlerServerTest, StopWhileConnected) {
+  server_thread().Start();
+  ScopedStopServerAndJoinThread scoped_stop_server_and_join_thread(
+      &server(), &server_thread());
+  ASSERT_NO_FATAL_FAILURE(delegate().WaitForStart());
+  CrashpadClient client;
+  client.SetHandler(pipe_name());  // Connect to server.
+  // Leaving this scope causes the server to be stopped, while the connection
+  // is still open.
+}
+
+std::string ReadString(FileHandle handle) {
+  size_t length = 0;
+  EXPECT_TRUE(LoggingReadFile(handle, &length, sizeof(length)));
+  scoped_ptr<char[]> buffer(new char[length]);
+  EXPECT_TRUE(LoggingReadFile(handle, &buffer[0], length));
+  return std::string(&buffer[0], length);
+}
+
+void WriteString(FileHandle handle, const std::string& str) {
+  size_t length = str.size();
+  EXPECT_TRUE(LoggingWriteFile(handle, &length, sizeof(length)));
+  EXPECT_TRUE(LoggingWriteFile(handle, &str[0], length));
+}
+
+class TestClient final : public WinChildProcess {
+ public:
+  TestClient() : WinChildProcess() {}
+
+  ~TestClient() {}
+
+ private:
+  int Run() override {
+    std::string pipe_name = ReadString(ReadPipeHandle());
+    CrashpadClient client;
+    if (!client.SetHandler(pipe_name)) {
+      ADD_FAILURE();
+      return EXIT_FAILURE;
+    }
+    if (!client.UseHandler()) {
+      ADD_FAILURE();
+      return EXIT_FAILURE;
+    }
+    WriteString(WritePipeHandle(), "OK");
+    return EXIT_SUCCESS;
+  }
+
+  DISALLOW_COPY_AND_ASSIGN(TestClient);
+};
+
+TEST_F(ExceptionHandlerServerTest, MultipleConnections) {
+  WinChildProcess::EntryPoint<TestClient>();
+
+  scoped_ptr<WinChildProcess::Handles> handles_1 = WinChildProcess::Launch();
+  scoped_ptr<WinChildProcess::Handles> handles_2 = WinChildProcess::Launch();
+  scoped_ptr<WinChildProcess::Handles> handles_3 = WinChildProcess::Launch();
+
+  // Must ensure the delegate outlasts the server.
+  {
+    server_thread().Start();
+    ScopedStopServerAndJoinThread scoped_stop_server_and_join_thread(
+        &server(), &server_thread());
+    ASSERT_NO_FATAL_FAILURE(delegate().WaitForStart());
+
+    // Tell all the children where to connect.
+    WriteString(handles_1->write.get(), pipe_name());
+    WriteString(handles_2->write.get(), pipe_name());
+    WriteString(handles_3->write.get(), pipe_name());
+
+    ASSERT_EQ("OK", ReadString(handles_3->read.get()));
+    ASSERT_EQ("OK", ReadString(handles_2->read.get()));
+    ASSERT_EQ("OK", ReadString(handles_1->read.get()));
+  }
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad