Collect unclean shutdown debug information

components/browser_watcher/stability_debugging_win.cc

+// Copyright (c) 2016 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 "components/browser_watcher/stability_debugging_win.h"
+
+#include <string>
+
+#include "base/metrics/persistent_memory_allocator.h"
+#include "base/path_service.h"
+#include "base/strings/stringprintf.h"
+#include "base/time/time.h"
+
+namespace browser_watcher {
+
+namespace {
+
+bool GetCreationTime(const base::Process& process, base::Time* time) {
+  DCHECK(time);
+
+  FILETIME creation_time = {};
+  FILETIME ignore1 = {};
+  FILETIME ignore2 = {};
+  FILETIME ignore3 = {};
+  if (!::GetProcessTimes(process.Handle(), &creation_time, &ignore1, &ignore2,
+                         &ignore3)) {
+    return false;
+  }
+  *time = base::Time::FromFileTime(creation_time);
+  return true;
+}
+
+}  // namespace
+
+// static
+base::FilePath StabilityDebugging::GetDir(const base::FilePath& user_data_dir) {
+  return user_data_dir.AppendASCII("Stability");
+}
+
+// static
+bool StabilityDebugging::GetFileForProcess(const base::Process& process,
+                                           const base::FilePath& user_data_dir,
+                                           base::FilePath* file_path) {
+  DCHECK(file_path);
+  base::FilePath stability_dir = GetDir(user_data_dir);
+
+  // Build the name using the pid and creation time. On windows, this is unique
+  // even after the process exits.
+  base::Time creation_time;
+  if (!GetCreationTime(process, &creation_time))
+    return false;
+
+  std::string file_name =
+      base::StringPrintf("%u-%llu", process.Pid(), creation_time.ToJavaTime());
+  *file_path = stability_dir.AppendASCII(file_name).AddExtension(
+      base::PersistentMemoryAllocator::kFileExtension);
+  return true;
+}
+
+// static
+base::FilePath::StringType StabilityDebugging::GetFilePattern() {
+  return base::FilePath::StringType(FILE_PATH_LITERAL("*-*")) +
+         base::PersistentMemoryAllocator::kFileExtension;
+}
+
+}  // namespace browser_watcher