1/*
2 * Copyright (C) 2015 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ExecutableAllocationFuzz.h"
28
29#include "TestRunnerUtils.h"
30#include <wtf/Atomics.h>
31#include <wtf/DataLog.h>
32
33namespace JSC {
34
35static Atomic<unsigned> s_numberOfExecutableAllocationFuzzChecks;
36unsigned numberOfExecutableAllocationFuzzChecks()
37{
38 return s_numberOfExecutableAllocationFuzzChecks.load();
39}
40
41ExecutableAllocationFuzzResult doExecutableAllocationFuzzing()
42{
43 ASSERT(Options::useExecutableAllocationFuzz());
44
45 unsigned oldValue;
46 unsigned newValue;
47 do {
48 oldValue = s_numberOfExecutableAllocationFuzzChecks.load();
49 newValue = oldValue + 1;
50 } while (!s_numberOfExecutableAllocationFuzzChecks.compareExchangeWeak(oldValue, newValue));
51
52 if (newValue == Options::fireExecutableAllocationFuzzAt()) {
53 if (Options::verboseExecutableAllocationFuzz()) {
54 dataLog("Will pretend to fail executable allocation.\n");
55 WTFReportBacktrace();
56 }
57 return PretendToFailExecutableAllocation;
58 }
59
60 if (Options::fireExecutableAllocationFuzzAtOrAfter()
61 && newValue >= Options::fireExecutableAllocationFuzzAtOrAfter()) {
62 if (Options::verboseExecutableAllocationFuzz()) {
63 dataLog("Will pretend to fail executable allocation.\n");
64 WTFReportBacktrace();
65 }
66 return PretendToFailExecutableAllocation;
67 }
68
69 return AllowNormalExecutableAllocation;
70}
71
72} // namespace JSC
73
74