jit/JITExceptions.cpp

   1 /*
   2  * Copyright (C) 2012, 2013 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 "JITStubs.h"
  33 #include "JSCJSValue.h"
  34 #include "LLIntData.h"
  35 #include "LLIntOpcode.h"
  36 #include "LLIntThunks.h"
  37 #include "Opcode.h"
  38 #include "JSCInlines.h"
  39 #include "VM.h"
  40
  41 namespace JSC {
  42
  43 void genericUnwind(VM* vm, ExecState* callFrame, JSValue exceptionValue)
  44 {
  45     if (Options::breakOnThrow()) {
  46         dataLog("In call frame ", RawPointer(callFrame), " for code block ", *callFrame->codeBlock(), "\n");
  47         CRASH();
  48     }
  49
  50     RELEASE_ASSERT(exceptionValue);
  51     HandlerInfo* handler = vm->interpreter->unwind(callFrame, exceptionValue); // This may update callFrame.
  52
  53     void* catchRoutine;
  54     Instruction* catchPCForInterpreter = 0;
  55     if (handler) {
  56         catchPCForInterpreter = &callFrame->codeBlock()->instructions()[handler->target];
  57 #if ENABLE(JIT)
  58         catchRoutine = handler->nativeCode.executableAddress();
  59 #else
  60         catchRoutine = catchPCForInterpreter->u.pointer;
  61 #endif
  62     } else
  63         catchRoutine = LLInt::getCodePtr(handleUncaughtException);
  64
  65     vm->callFrameForThrow = callFrame;
  66     vm->targetMachinePCForThrow = catchRoutine;
  67     vm->targetInterpreterPCForThrow = catchPCForInterpreter;
  68
  69     RELEASE_ASSERT(catchRoutine);
  70 }
  71
  72 } // namespace JSC