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/*
* Copyright (C) 2014-2021 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 "ExceptionFuzz.h"
#include "Error.h"
#include "HeapInlines.h"
#include "JSCJSValueInlines.h"
#include "TestRunnerUtils.h"
namespace JSC {
static unsigned s_numberOfExceptionFuzzChecks;
unsigned numberOfExceptionFuzzChecks() { return s_numberOfExceptionFuzzChecks; }
// Call this only if you know that exception fuzzing is enabled.
void doExceptionFuzzing(JSGlobalObject* globalObject, ThrowScope& scope, ASCIILiteral where, const void* returnPC)
{
VM& vm = scope.vm();
ASSERT(Options::useExceptionFuzz());
DeferGCForAWhile deferGC(vm);
s_numberOfExceptionFuzzChecks++;
unsigned fireTarget = Options::fireExceptionFuzzAt();
if (fireTarget == s_numberOfExceptionFuzzChecks) {
SAFE_PRINTF("JSC EXCEPTION FUZZ: Throwing fuzz exception with call frame %p, seen in %s and return address %p.\n", globalObject, where, returnPC);
fflush(stdout);
// The ThrowScope also checks for unchecked simulated exceptions before throwing a
// new exception. This ensures that we don't quietly overwrite a pending exception
// (which should never happen with the only exception being to rethrow the same
// exception). However, ExceptionFuzz works by intentionally throwing its own exception
// even when one may already exist. This is ok for ExceptionFuzz testing, but we need
// to placate the exception check verifier here.
EXCEPTION_ASSERT(scope.exception() || !scope.exception());
throwException(globalObject, scope, createError(globalObject, "Exception Fuzz"_s));
}
}
} // namespace JSC
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