mfbt/ChaosMode.h@97036ab72558
mfbt/ChaosMode.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
7 #ifndef mozilla_ChaosMode_h
8 #define mozilla_ChaosMode_h
10 #include <stdint.h>
11 #include <stdlib.h>
13 namespace mozilla {
15 /**
16 * When "chaos mode" is activated, code that makes implicitly nondeterministic
17 * choices is encouraged to make random and extreme choices, to test more
18 * code paths and uncover bugs.
19 */
20 class ChaosMode
21 {
22 public:
23 static bool isActive()
24 {
25 // Flip this to true to activate chaos mode
26 return false;
27 }
29 /**
30 * Returns a somewhat (but not uniformly) random uint32_t < aBound.
31 * Not to be used for anything except ChaosMode, since it's not very random.
32 */
33 static uint32_t randomUint32LessThan(uint32_t aBound)
34 {
35 return uint32_t(rand()) % aBound;
36 }
37 };
39 } /* namespace mozilla */
41 #endif /* mozilla_ChaosMode_h */
