JavaScriptCore-7600.1.4.15.12.tar.gz

[apple/javascriptcore.git] / jit / JITExceptions.cpp

/*
 * Copyright (C) 2012, 2013 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
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#include "config.h"
#include "JITExceptions.h"

#include "CallFrame.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JITStubs.h"
#include "JSCJSValue.h"
#include "LLIntData.h"
#include "LLIntOpcode.h"
#include "LLIntThunks.h"
#include "Opcode.h"
#include "JSCInlines.h"
#include "VM.h"

namespace JSC {

void genericUnwind(VM* vm, ExecState* callFrame, JSValue exceptionValue)
{
    if (Options::breakOnThrow()) {
        dataLog("In call frame ", RawPointer(callFrame), " for code block ", *callFrame->codeBlock(), "\n");
        CRASH();
    }
    
    RELEASE_ASSERT(exceptionValue);
    HandlerInfo* handler = vm->interpreter->unwind(callFrame, exceptionValue); // This may update callFrame.

    void* catchRoutine;
    Instruction* catchPCForInterpreter = 0;
    if (handler) {
        catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
#if ENABLE(JIT)
        catchRoutine = handler->nativeCode.executableAddress();
#else
        catchRoutine = catchPCForInterpreter->u.pointer;
#endif
    } else
        catchRoutine = LLInt::getCodePtr(handleUncaughtException);
    
    vm->callFrameForThrow = callFrame;
    vm->targetMachinePCForThrow = catchRoutine;
    vm->targetInterpreterPCForThrow = catchPCForInterpreter;
    
    RELEASE_ASSERT(catchRoutine);
}

} // namespace JSC