2 * Copyright (C) 2012 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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
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23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "JITExceptions.h"
29 #include "CallFrame.h"
30 #include "CallFrameInlines.h"
31 #include "CodeBlock.h"
32 #include "Interpreter.h"
33 #include "JSCJSValue.h"
35 #include "Operations.h"
37 #if ENABLE(JIT) || ENABLE(LLINT)
41 static unsigned getExceptionLocation(VM* vm, CallFrame* callFrame)
44 ASSERT(!callFrame->hasHostCallFrameFlag());
47 if (callFrame->hasLocationAsCodeOriginIndex())
48 return callFrame->bytecodeOffsetFromCodeOriginIndex();
51 return callFrame->locationAsBytecodeOffset();
55 EncodedExceptionHandler encode(ExceptionHandler handler)
57 ExceptionHandlerUnion u;
59 return u.encodedHandler;
63 ExceptionHandler uncaughtExceptionHandler()
65 void* catchRoutine = FunctionPtr(LLInt::getCodePtr(ctiOpThrowNotCaught)).value();
66 ExceptionHandler exceptionHandler = { 0, catchRoutine};
67 return exceptionHandler;
70 ExceptionHandler genericUnwind(VM* vm, ExecState* callFrame, JSValue exceptionValue, unsigned vPCIndex)
72 RELEASE_ASSERT(exceptionValue);
73 HandlerInfo* handler = vm->interpreter->unwind(callFrame, exceptionValue, vPCIndex); // This may update callFrame.
76 Instruction* catchPCForInterpreter = 0;
78 catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
79 catchRoutine = ExecutableBase::catchRoutineFor(handler, catchPCForInterpreter);
81 catchRoutine = FunctionPtr(LLInt::getCodePtr(ctiOpThrowNotCaught)).value();
83 vm->callFrameForThrow = callFrame;
84 vm->targetMachinePCForThrow = catchRoutine;
85 vm->targetInterpreterPCForThrow = catchPCForInterpreter;
87 RELEASE_ASSERT(catchRoutine);
88 ExceptionHandler exceptionHandler = { callFrame, catchRoutine};
89 return exceptionHandler;
92 ExceptionHandler jitThrowNew(VM* vm, ExecState* callFrame, JSValue exceptionValue)
94 unsigned bytecodeOffset = getExceptionLocation(vm, callFrame);
96 return genericUnwind(vm, callFrame, exceptionValue, bytecodeOffset);
99 ExceptionHandler jitThrow(VM* vm, ExecState* callFrame, JSValue exceptionValue, ReturnAddressPtr faultLocation)
101 return genericUnwind(vm, callFrame, exceptionValue, callFrame->codeBlock()->bytecodeOffset(callFrame, faultLocation));