Add a flag to print the handles held by a child process when it shuts down.

content/browser/handle_enumerator_win.h

+// 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.
+
+#ifndef CONTENT_BROWSER_HANDLE_ENUMERATOR_WIN_H_
+#define CONTENT_BROWSER_HANDLE_ENUMERATOR_WIN_H_
+
+#include "base/memory/ref_counted.h"
+#include "base/process.h"
+#include "content/common/child_process_info.h"
+
+namespace content {
+
+enum HandleType {
+  ProcessHandle,
+  ThreadHandle,
+  FileHandle,
+  DirectoryHandle,
+  KeyHandle,
+  WindowStationHandle,
+  DesktopHandle,
+  ServiceHandle,
+  EventHandle,
+  MutexHandle,
+  SemaphoreHandle,
+  TimerHandle,
+  NamedPipeHandle,
+  JobHandle,
+  FileMapHandle,
+  OtherHandle
+};
+
+static HandleType StringToHandleType(const string16& type);
+
+static string16 ProcessTypeString(ChildProcessInfo::ProcessType process_type);
+
+static string16 GetAccessString(HandleType handle_type, ACCESS_MASK access);
+
+class HandleEnumerator : public base::RefCountedThreadSafe<HandleEnumerator> {
+ public:
+  enum HandleEnumStatus {
+    Starting,
+    InProgress,
+    Finished
+  };
+
+  HandleEnumerator(base::ProcessHandle handle, bool all_handles):
+      handle_(handle),
+      type_(ChildProcessInfo::UNKNOWN_PROCESS),
+      status_(Starting),
+      all_handles_(all_handles) { }
+
+  ChildProcessInfo::ProcessType type() const { return type_; }
+
+  HandleEnumStatus status() const { return status_; }
+
+  void RunHandleEnumeration();
+
+  void EnumerateHandles();
+
+ private:
+  void FindProcessOnIOThread();
+
+  void FindProcessOnUIThread();
+
+  void EnumerateHandlesAndTerminateProcess();
+
+  base::ProcessHandle handle_;
+  ChildProcessInfo::ProcessType type_;
+  HandleEnumStatus status_;
+  bool all_handles_;
+
+  DISALLOW_COPY_AND_ASSIGN(HandleEnumerator);
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_HANDLE_ENUMERATOR_WIN_H_