win: Add implementation of ProcessInfo

util/win/process_info_test_child.cc

Index: util/win/process_info_test_child.cc
diff --git a/util/win/process_info_test_child.cc b/util/win/process_info_test_child.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f2348312b95eda8c345f13444ce26ed492d92761
--- /dev/null
+++ b/util/win/process_info_test_child.cc
@@ -0,0 +1,44 @@
+// 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 <stdlib.h>
+#include <windows.h>
+
+// A simple binary to be loaded and inspected by ProcessInfo.
+int wmain(int argc, wchar_t** argv) {

[Mark Mentovai, 2015/03/05 21:53:37]

Technically IWYU would want <wchar.h> but I couldn’t imagine wchar_t ever not
being available from the other two #includes on Windows.

[scottmg, 2015/03/06 00:42:52]

Done.

+  if (argc != 3)
+    abort();
+
+  // Get handles to the events we use to communicate with our parent.
+  HANDLE started_event = CreateEvent(nullptr, true, false, argv[1]);
+  HANDLE done_event = CreateEvent(nullptr, true, false, argv[2]);
+  if (!started_event || !done_event)
+    abort();
+
+  // Load an unusual module (that we don't depend upon) so we can do an
+  // existence check.
+  if (!LoadLibrary(L"lz32.dll"))
+    abort();
+
+  if (!SetEvent(started_event))
+    abort();
+
+  if (WaitForSingleObject(done_event, INFINITE) != WAIT_OBJECT_0)
+    abort();
+
+  CloseHandle(done_event);
+  CloseHandle(started_event);
+
+  return 0;

[Mark Mentovai, 2015/03/05 21:53:37]

Use EXIT_SUCCESS instead of 0. (You’ve already #included <stdlib.h>.)

[scottmg, 2015/03/06 00:42:52]

Done.

+}