runtime/ErrorHandlingScope.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 "ErrorHandlingScope.h"
  28
  29 #include "Interpreter.h"
  30 #include "Options.h"
  31 #include "VM.h"
  32
  33 namespace JSC {
  34
  35 ErrorHandlingScope::ErrorHandlingScope(VM& vm)
  36     : m_vm(vm)
  37 {
  38     RELEASE_ASSERT(m_vm.stackPointerAtVMEntry());
  39     size_t newReservedZoneSize = Options::errorModeReservedZoneSize();
  40     m_savedReservedZoneSize = m_vm.updateReservedZoneSize(newReservedZoneSize);
  41 #if !ENABLE(JIT)
  42     m_vm.interpreter->stack().setReservedZoneSize(newReservedZoneSize);
  43 #endif
  44 }
  45
  46 ErrorHandlingScope::~ErrorHandlingScope()
  47 {
  48     RELEASE_ASSERT(m_vm.stackPointerAtVMEntry());
  49     m_vm.updateReservedZoneSize(m_savedReservedZoneSize);
  50 #if !ENABLE(JIT)
  51     m_vm.interpreter->stack().setReservedZoneSize(m_savedReservedZoneSize);
  52 #endif
  53 }
  54
  55 } // namespace JSC