win: Don't duplicate handles in handle restriction list

client/crashpad_client_win_test.cc

Index: client/crashpad_client_win_test.cc
diff --git a/client/crashpad_client_win_test.cc b/client/crashpad_client_win_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2215e2a8ff20ce8fea11715aa15c3a512917f1f1
--- /dev/null
+++ b/client/crashpad_client_win_test.cc
@@ -0,0 +1,91 @@
+// 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 "client/crashpad_client.h"
+
+#include "base/files/file_path.h"
+#include "gtest/gtest.h"
+#include "test/paths.h"
+#include "test/scoped_temp_dir.h"
+#include "test/win/win_multiprocess.h"
+
+namespace crashpad {
+namespace test {
+namespace {
+
+void StartAndUseHandler() {
+  ScopedTempDir temp_dir;
+  base::FilePath handler_path = Paths::Executable().DirName().Append(
+      FILE_PATH_LITERAL("crashpad_handler.exe"));
+  CrashpadClient client;
+  ASSERT_TRUE(client.StartHandler(handler_path,
+                                  temp_dir.path(),
+                                  "",
+                                  std::map<std::string, std::string>(),
+                                  std::vector<std::string>(),
+                                  false));
+  EXPECT_TRUE(client.UseHandler());
+}
+
+class StartWithInvalidHandles final : public WinMultiprocess {
+ public:
+  StartWithInvalidHandles() : WinMultiprocess() {}
+  ~StartWithInvalidHandles() {}
+
+ private:
+  void WinMultiprocessParent() override {}
+
+  void WinMultiprocessChild() override {
+    HANDLE original_stdout = GetStdHandle(STD_OUTPUT_HANDLE);
+    HANDLE original_stderr = GetStdHandle(STD_ERROR_HANDLE);
+    SetStdHandle(STD_OUTPUT_HANDLE, INVALID_HANDLE_VALUE);
+    SetStdHandle(STD_ERROR_HANDLE, INVALID_HANDLE_VALUE);
+
+    StartAndUseHandler();
+
+    SetStdHandle(STD_OUTPUT_HANDLE, original_stdout);
+    SetStdHandle(STD_ERROR_HANDLE, original_stderr);
+  }
+};
+
+TEST(CrashpadClient, StartWithInvalidHandles) {
+  WinMultiprocess::Run<StartWithInvalidHandles>();
+}
+
+class StartWithSameStdoutStderr final : public WinMultiprocess {
+ public:
+  StartWithSameStdoutStderr() : WinMultiprocess() {}
+  ~StartWithSameStdoutStderr() {}
+
+ private:
+  void WinMultiprocessParent() override {}
+
+  void WinMultiprocessChild() override {
+    HANDLE original_stdout = GetStdHandle(STD_OUTPUT_HANDLE);
+    HANDLE original_stderr = GetStdHandle(STD_ERROR_HANDLE);
+    SetStdHandle(STD_OUTPUT_HANDLE, original_stderr);
+
+    StartAndUseHandler();
+
+    SetStdHandle(STD_OUTPUT_HANDLE, original_stdout);
+  }
+};
+
+TEST(CrashpadClient, StartWithSameStdoutStderr) {
+  WinMultiprocess::Run<StartWithSameStdoutStderr>();
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace crashpad