A simple, practically zero cost fallback crash handler for Crashpad handler process.

components/crash/content/app/fallback_crash_handler_win.h

Index: components/crash/content/app/fallback_crash_handler_win.h
diff --git a/components/crash/content/app/fallback_crash_handler_win.h b/components/crash/content/app/fallback_crash_handler_win.h
new file mode 100644
index 0000000000000000000000000000000000000000..b631ac6d8309104d096140f50a0e2c11ee6194a0
--- /dev/null
+++ b/components/crash/content/app/fallback_crash_handler_win.h
@@ -0,0 +1,39 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.

[scottmg, 2017/01/06 18:29:04]

2017

[Sigurður Ásgeirsson, 2017/01/06 20:59:11]

Done.

+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_CRASH_CONTENT_APP_FALLBACK_CRASH_HANDLER_WIN_H_
+#define COMPONENTS_CRASH_CONTENT_APP_FALLBACK_CRASH_HANDLER_WIN_H_
+
+#include "base/command_line.h"
+#include "base/files/file_path.h"
+#include "base/process/process.h"
+#include "base/threading/platform_thread.h"
+
+#include <windows.h>

[scottmg, 2017/01/06 18:29:04]

<> before ""

[Sigurður Ásgeirsson, 2017/01/06 20:59:11]

Done.

+
+namespace crash_reporter {
+
+// In the fallback crash handler, this invokes the system crash machinery
+// (MinidumpWriteDump) to generate the crash report, then adds the report to

[scottmg, 2017/01/06 18:29:04]

MiniDumpWriteDump

[Sigurður Ásgeirsson, 2017/01/06 20:59:11]

Done.

+// the Crashpad database for upload.
+// TODO(siggi):
+class FallbackCrashHandler {
+ public:
+  FallbackCrashHandler();
+  ~FallbackCrashHandler();
+
+  bool ParseCommandLine(base::CommandLine* cmd_line);
+  bool GenerateCrashDump();
+
+ private:
+  base::Process process_;
+  base::PlatformThreadId thread_id_;
+  // This pointer is in the address space of process_, not our own.
+  EXCEPTION_POINTERS* exc_ptrs_;
+  base::FilePath database_dir_;
+};
+
+}  // namespace crash_reporter
+
+#endif  // COMPONENTS_CRASH_CONTENT_APP_FALLBACK_CRASH_HANDLER_WIN_H_