runtime/Exception.cpp

   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 "Exception.h"
  28
  29 #include "JSCInlines.h"
  30
  31 namespace JSC {
  32
  33 const ClassInfo Exception::s_info = { "Exception", &Base::s_info, 0, CREATE_METHOD_TABLE(Exception) };
  34
  35 Exception* Exception::create(VM& vm, JSValue thrownValue, StackCaptureAction action)
  36 {
  37     Exception* result = new (NotNull, allocateCell<Exception>(vm.heap)) Exception(vm);
  38     result->finishCreation(vm, thrownValue, action);
  39     return result;
  40 }
  41
  42 void Exception::destroy(JSCell* cell)
  43 {
  44     Exception* exception = static_cast<Exception*>(cell);
  45     exception->~Exception();
  46 }
  47
  48 Structure* Exception::createStructure(VM& vm, JSGlobalObject* globalObject, JSValue prototype)
  49 {
  50     return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
  51 }
  52
  53 void Exception::visitChildren(JSCell* cell, SlotVisitor& visitor)
  54 {
  55     Exception* thisObject = jsCast<Exception*>(cell);
  56     ASSERT_GC_OBJECT_INHERITS(thisObject, info());
  57     Base::visitChildren(thisObject, visitor);
  58
  59     visitor.append(&thisObject->m_value);
  60 }
  61
  62 Exception::Exception(VM& vm)
  63     : Base(vm, vm.exceptionStructure.get())
  64 {
  65 }
  66
  67 Exception::~Exception()
  68 {
  69 }
  70
  71 void Exception::finishCreation(VM& vm, JSValue thrownValue, StackCaptureAction action)
  72 {
  73     Base::finishCreation(vm);
  74
  75     m_value.set(vm, this, thrownValue);
  76
  77     Vector<StackFrame> stackTrace;
  78     if (action == StackCaptureAction::CaptureStack)
  79         vm.interpreter->getStackTrace(stackTrace);
  80     m_stack = RefCountedArray<StackFrame>(stackTrace);
  81 }
  82
  83 } // namespace JSC