mfbt/ChaosMode.h@97036ab72558 (annotated)
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.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set ts=8 sts=2 et sw=2 tw=80: */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef mozilla_ChaosMode_h |
| michael@0 | 8 | #define mozilla_ChaosMode_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include <stdint.h> |
| michael@0 | 11 | #include <stdlib.h> |
| michael@0 | 12 | |
| michael@0 | 13 | namespace mozilla { |
| michael@0 | 14 | |
| michael@0 | 15 | /** |
| michael@0 | 16 | * When "chaos mode" is activated, code that makes implicitly nondeterministic |
| michael@0 | 17 | * choices is encouraged to make random and extreme choices, to test more |
| michael@0 | 18 | * code paths and uncover bugs. |
| michael@0 | 19 | */ |
| michael@0 | 20 | class ChaosMode |
| michael@0 | 21 | { |
| michael@0 | 22 | public: |
| michael@0 | 23 | static bool isActive() |
| michael@0 | 24 | { |
| michael@0 | 25 | // Flip this to true to activate chaos mode |
| michael@0 | 26 | return false; |
| michael@0 | 27 | } |
| michael@0 | 28 | |
| michael@0 | 29 | /** |
| michael@0 | 30 | * Returns a somewhat (but not uniformly) random uint32_t < aBound. |
| michael@0 | 31 | * Not to be used for anything except ChaosMode, since it's not very random. |
| michael@0 | 32 | */ |
| michael@0 | 33 | static uint32_t randomUint32LessThan(uint32_t aBound) |
| michael@0 | 34 | { |
| michael@0 | 35 | return uint32_t(rand()) % aBound; |
| michael@0 | 36 | } |
| michael@0 | 37 | }; |
| michael@0 | 38 | |
| michael@0 | 39 | } /* namespace mozilla */ |
| michael@0 | 40 | |
| michael@0 | 41 | #endif /* mozilla_ChaosMode_h */ |
