interpreter/CachedCall.h

   1 /*
   2  * Copyright (C) 2009, 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 #ifndef CachedCall_h
  27 #define CachedCall_h
  28
  29 #include "CallFrameClosure.h"
  30 #include "ExceptionHelpers.h"
  31 #include "JSFunction.h"
  32 #include "JSGlobalObject.h"
  33 #include "Interpreter.h"
  34 #include "ProtoCallFrame.h"
  35 #include "VMEntryScope.h"
  36
  37 namespace JSC {
  38     class CachedCall {
  39         WTF_MAKE_NONCOPYABLE(CachedCall); WTF_MAKE_FAST_ALLOCATED;
  40     public:
  41         CachedCall(CallFrame* callFrame, JSFunction* function, int argumentCount)
  42             : m_valid(false)
  43             , m_interpreter(callFrame->interpreter())
  44             , m_entryScope(callFrame->vm(), function->scope()->globalObject())
  45         {
  46             ASSERT(!function->isHostFunctionNonInline());
  47             if (callFrame->vm().isSafeToRecurse()) {
  48                 m_arguments.resize(argumentCount);
  49                 m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, &m_protoCallFrame, function, argumentCount + 1, function->scope(), m_arguments.data());
  50             } else
  51                 throwStackOverflowError(callFrame);
  52             m_valid = !callFrame->hadException();
  53         }
  54
  55         JSValue call()
  56         {
  57             ASSERT(m_valid);
  58             return m_interpreter->execute(m_closure);
  59         }
  60         void setThis(JSValue v) { m_protoCallFrame.setThisValue(v); }
  61         void setArgument(int n, JSValue v) { m_protoCallFrame.setArgument(n, v); }
  62
  63     private:
  64         bool m_valid;
  65         Interpreter* m_interpreter;
  66         VMEntryScope m_entryScope;
  67         ProtoCallFrame m_protoCallFrame;
  68         Vector<JSValue> m_arguments;
  69         CallFrameClosure m_closure;
  70     };
  71 }
  72
  73 #endif