extensions/browser/bad_message.h

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef EXTENSIONS_BROWSER_BAD_MESSAGE_H_
   6 #define EXTENSIONS_BROWSER_BAD_MESSAGE_H_
   7
   8 namespace content {
   9 class RenderProcessHost;
  10 }
  11
  12 namespace extensions {
  13 namespace bad_message {
  14
  15 // The browser process often chooses to terminate a renderer if it receives
  16 // a bad IPC message. The reasons are tracked for metrics.
  17 //
  18 // See also content/browser/bad_message.h.
  19 //
  20 // NOTE: Do not remove or reorder elements in this list. Add new entries at the
  21 // end. Items may be renamed but do not change the values. We rely on the enum
  22 // values in histograms.
  23 enum BadMessageReason {
  24   EOG_BAD_ORIGIN = 0,
  25   EVG_BAD_ORIGIN = 1,
  26   BH_BLOB_NOT_OWNED = 2,
  27   EH_BAD_EVENT_ID = 3,
  28   AVG_BAD_INST_ID = 4,
  29   AVG_BAD_EXT_ID = 5,
  30   AVG_NULL_AVG = 6,
  31   // Please add new elements here. The naming convention is abbreviated class
  32   // name (e.g. ExtensionHost becomes EH) plus a unique description of the
  33   // reason. After making changes, you MUST update histograms.xml by running:
  34   // "python tools/metrics/histograms/update_bad_message_reasons.py"
  35   BAD_MESSAGE_MAX
  36 };
  37
  38 // Called when the browser receives a bad IPC message from an extension process.
  39 // Logs the event, records a histogram metric for the |reason|, and terminates
  40 // the process for |host|.
  41 void ReceivedBadMessage(content::RenderProcessHost* host,
  42                         BadMessageReason reason);
  43
  44 }  // namespace bad_message
  45 }  // namespace extensions
  46
  47 #endif  // EXTENSIONS_BROWSER_BAD_MESSAGE_H_