Add check on invalid file descriptor at both broker and renderer sides.

content/renderer/pepper_plugin_delegate_impl_unittest.cc

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "content/renderer/pepper_plugin_delegate_impl.h"
+
+#if defined(OS_POSIX)
+#include <fcntl.h>
+#include <sys/socket.h>
+#endif  // defined(OS_POSIX)
+
+#include "content/test/mock_render_process.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+class PepperPluginDelegateImplTest : public ::testing::Test {
+ protected:
+  MessageLoopForIO message_loop_;
+  // We need a render process for ppapi::proxy::ProxyChannel to work.
+  MockRenderProcess mock_process_;
+};
+
+// Try to initialize BrokerDispatcherWrapper with invalid ChannelHandle.
+// Initialization should fail.
+TEST_F(PepperPluginDelegateImplTest, BrokerDispatcherWrapperInitFailure) {
+  BrokerDispatcherWrapper dispatcher_wrapper;
+  base::ProcessHandle broker_process_handle = base::kNullProcessHandle;
+  IPC::ChannelHandle invalid_channel;  // Invalid by default.
+
+  // An invalid handle should result in a failure (false) without a LOG(FATAL),
+  // such as the one in CreatePipe().  Call it twice because without the invalid
+  // handle check, the posix code would hit a one-time path due to a static
+  // variable and go through the LOG(FATAL) path.
+  EXPECT_FALSE(dispatcher_wrapper.Init(broker_process_handle, invalid_channel));
+  EXPECT_FALSE(dispatcher_wrapper.Init(broker_process_handle, invalid_channel));
+}
+
+// On valid ChannelHandle, initialization should succeed.
+TEST_F(PepperPluginDelegateImplTest, BrokerDispatcherWrapperInitSuccess) {
+  BrokerDispatcherWrapper dispatcher_wrapper;
+  base::ProcessHandle broker_process_handle = base::kNullProcessHandle;
+  const char kChannelName[] = "PepperPluginDelegateImplTestChannelName";
+#if defined(OS_POSIX)
+  int fds[2] = {-1, -1};
+  ASSERT_EQ(0, socketpair(AF_UNIX, SOCK_STREAM, 0, fds));
+  // Channel::ChannelImpl::CreatePipe needs the fd to be non-blocking.
+  ASSERT_EQ(0, fcntl(fds[1], F_SETFL, O_NONBLOCK));
+  base::FileDescriptor file_descriptor(fds[1], true);  // Auto close.
+  IPC::ChannelHandle valid_channel(kChannelName, file_descriptor);
+#else
+  IPC::ChannelHandle valid_channel(kChannelName);
+#endif  // defined(OS_POSIX));
+
+  EXPECT_TRUE(dispatcher_wrapper.Init(broker_process_handle, valid_channel));
+
+#if defined(OS_POSIX)
+  EXPECT_EQ(0, ::close(fds[0]));
+#endif  // defined(OS_POSIX));
+}