Imported QtWebKit TP3 (git b57bc6801f1876c3220d5a4bfea33d620d477443)

Change-Id: I3b1d8a2808782c9f34d50240000e20cb38d3680f
Reviewed-by: Konstantin Tokarev <annulen@yandex.ru>

1 files changed, 73 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/jit/ExecutableAllocationFuzz.cpp b/Source/JavaScriptCore/jit/ExecutableAllocationFuzz.cpp
new file mode 100644
index 000000000..b4f56650b
--- /dev/null
+++ b/Source/JavaScriptCore/jit/ExecutableAllocationFuzz.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2015 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#include "config.h"
+#include "ExecutableAllocationFuzz.h"
+
+#include "TestRunnerUtils.h"
+#include <wtf/Atomics.h>
+#include <wtf/DataLog.h>
+
+namespace JSC {
+
+static Atomic<unsigned> s_numberOfExecutableAllocationFuzzChecks;
+unsigned numberOfExecutableAllocationFuzzChecks()
+{
+    return s_numberOfExecutableAllocationFuzzChecks.load();
+}
+
+ExecutableAllocationFuzzResult doExecutableAllocationFuzzing()
+{
+    ASSERT(Options::useExecutableAllocationFuzz());
+    
+    unsigned oldValue;
+    unsigned newValue;
+    do {
+        oldValue = s_numberOfExecutableAllocationFuzzChecks.load();
+        newValue = oldValue + 1;
+    } while (!s_numberOfExecutableAllocationFuzzChecks.compareExchangeWeak(oldValue, newValue));
+    
+    if (newValue == Options::fireExecutableAllocationFuzzAt()) {
+        if (Options::verboseExecutableAllocationFuzz()) {
+            dataLog("Will pretend to fail executable allocation.\n");
+            WTFReportBacktrace();
+        }
+        return PretendToFailExecutableAllocation;
+    }
+    
+    if (Options::fireExecutableAllocationFuzzAtOrAfter()
+        && newValue >= Options::fireExecutableAllocationFuzzAtOrAfter()) {
+        if (Options::verboseExecutableAllocationFuzz()) {
+            dataLog("Will pretend to fail executable allocation.\n");
+            WTFReportBacktrace();
+        }
+        return PretendToFailExecutableAllocation;
+    }
+    
+    return AllowNormalExecutableAllocation;
+}
+
+} // namespace JSC
+