jit/JITExceptions.cpp

   1 /*
   2  * Copyright (C) 2012 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 "JITExceptions.h"
  28
  29 #include "CallFrame.h"
  30 #include "CodeBlock.h"
  31 #include "Interpreter.h"
  32 #include "JSGlobalData.h"
  33 #include "JSValue.h"
  34
  35 #if ENABLE(JIT)
  36
  37 namespace JSC {
  38
  39 ExceptionHandler genericThrow(JSGlobalData* globalData, ExecState* callFrame, JSValue exceptionValue, unsigned vPCIndex)
  40 {
  41     ASSERT(exceptionValue);
  42
  43     globalData->exception = JSValue();
  44     HandlerInfo* handler = globalData->interpreter->throwException(callFrame, exceptionValue, vPCIndex); // This may update callFrame & exceptionValue!
  45     globalData->exception = exceptionValue;
  46
  47     void* catchRoutine;
  48     Instruction* catchPCForInterpreter = 0;
  49     if (handler) {
  50         catchRoutine = handler->nativeCode.executableAddress();
  51         catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
  52     } else
  53         catchRoutine = FunctionPtr(ctiOpThrowNotCaught).value();
  54
  55     globalData->callFrameForThrow = callFrame;
  56     globalData->targetMachinePCForThrow = catchRoutine;
  57     globalData->targetInterpreterPCForThrow = catchPCForInterpreter;
  58
  59     ASSERT(catchRoutine);
  60     ExceptionHandler exceptionHandler = { catchRoutine, callFrame };
  61     return exceptionHandler;
  62 }
  63
  64 ExceptionHandler jitThrow(JSGlobalData* globalData, ExecState* callFrame, JSValue exceptionValue, ReturnAddressPtr faultLocation)
  65 {
  66     return genericThrow(globalData, callFrame, exceptionValue, callFrame->codeBlock()->bytecodeOffset(callFrame, faultLocation));
  67 }
  68
  69 }
  70
  71 #endif