runtime/ExceptionFuzz.cpp

   1 /*
   2  * Copyright (C) 2014 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 "ExceptionFuzz.h"
  28
  29 #include "Error.h"
  30 #include "JSCInlines.h"
  31 #include "TestRunnerUtils.h"
  32
  33 namespace JSC {
  34
  35 static unsigned s_numberOfExceptionFuzzChecks;
  36 unsigned numberOfExceptionFuzzChecks() { return s_numberOfExceptionFuzzChecks; }
  37
  38 // Call this only if you know that exception fuzzing is enabled.
  39 void doExceptionFuzzing(ExecState* exec, const char* where, void* returnPC)
  40 {
  41     ASSERT(Options::enableExceptionFuzz());
  42
  43     DeferGCForAWhile deferGC(exec->vm().heap);
  44
  45     s_numberOfExceptionFuzzChecks++;
  46
  47     unsigned fireTarget = Options::fireExceptionFuzzAt();
  48     if (fireTarget == s_numberOfExceptionFuzzChecks) {
  49         printf("JSC EXCEPTION FUZZ: Throwing fuzz exception with call frame %p, seen in %s and return address %p.\n", exec, where, returnPC);
  50         exec->vm().throwException(
  51             exec, createError(exec, ASCIILiteral("Exception Fuzz")));
  52     }
  53 }
  54
  55 } // namespace JSC
  56
  57