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/*
* 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
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "LLIntThunks.h"
#include "CallData.h"
#include "ExceptionHelpers.h"
#include "Interpreter.h"
#include "JSInterfaceJIT.h"
#include "JSObject.h"
#include "JSStackInlines.h"
#include "LLIntCLoop.h"
#include "LinkBuffer.h"
#include "LowLevelInterpreter.h"
#include "ProtoCallFrame.h"
#include "VM.h"
namespace JSC {
#if ENABLE(JIT)
#if ENABLE(LLINT)
namespace LLInt {
static MacroAssemblerCodeRef generateThunkWithJumpTo(VM* vm, void (*target)(), const char *thunkKind)
{
JSInterfaceJIT jit(vm);
// FIXME: there's probably a better way to do it on X86, but I'm not sure I care.
jit.move(JSInterfaceJIT::TrustedImmPtr(bitwise_cast<void*>(target)), JSInterfaceJIT::regT0);
jit.jump(JSInterfaceJIT::regT0);
LinkBuffer patchBuffer(*vm, &jit, GLOBAL_THUNK_ID);
return FINALIZE_CODE(patchBuffer, ("LLInt %s prologue thunk", thunkKind));
}
MacroAssemblerCodeRef functionForCallEntryThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_function_for_call_prologue, "function for call");
}
MacroAssemblerCodeRef functionForConstructEntryThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_function_for_construct_prologue, "function for construct");
}
MacroAssemblerCodeRef functionForCallArityCheckThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_function_for_call_arity_check, "function for call with arity check");
}
MacroAssemblerCodeRef functionForConstructArityCheckThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_function_for_construct_arity_check, "function for construct with arity check");
}
MacroAssemblerCodeRef evalEntryThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_eval_prologue, "eval");
}
MacroAssemblerCodeRef programEntryThunkGenerator(VM* vm)
{
return generateThunkWithJumpTo(vm, llint_program_prologue, "program");
}
} // namespace LLInt
#endif // ENABLE(LLINT)
#else // ENABLE(JIT)
// Non-JIT (i.e. C Loop LLINT) case:
typedef JSValue (*ExecuteCode) (CallFrame*, void* executableAddress);
template<ExecuteCode execute>
EncodedJSValue doCallToJavaScript(void* executableAddress, ProtoCallFrame* protoCallFrame)
{
CodeBlock* codeBlock = protoCallFrame->codeBlock();
JSScope* scope = protoCallFrame->scope();
JSObject* callee = protoCallFrame->callee();
int argCountIncludingThis = protoCallFrame->argumentCountIncludingThis();
int argCount = protoCallFrame->argumentCount();
JSValue thisValue = protoCallFrame->thisValue();
JSStack& stack = scope->vm()->interpreter->stack();
CallFrame* newCallFrame = stack.pushFrame(codeBlock, scope, argCountIncludingThis, callee);
if (UNLIKELY(!newCallFrame)) {
JSGlobalObject* globalObject = scope->globalObject();
ExecState* exec = globalObject->globalExec();
return JSValue::encode(throwStackOverflowError(exec));
}
// Set the arguments for the callee:
newCallFrame->setThisValue(thisValue);
for (int i = 0; i < argCount; ++i)
newCallFrame->setArgument(i, protoCallFrame->argument(i));
JSValue result = execute(newCallFrame, executableAddress);
stack.popFrame(newCallFrame);
return JSValue::encode(result);
}
static inline JSValue executeJS(CallFrame* newCallFrame, void* executableAddress)
{
Opcode entryOpcode = *reinterpret_cast<Opcode*>(&executableAddress);
return CLoop::execute(newCallFrame, entryOpcode);
}
EncodedJSValue callToJavaScript(void* executableAddress, ExecState**, ProtoCallFrame* protoCallFrame, Register*)
{
return doCallToJavaScript<executeJS>(executableAddress, protoCallFrame);
}
static inline JSValue executeNative(CallFrame* newCallFrame, void* executableAddress)
{
NativeFunction function = reinterpret_cast<NativeFunction>(executableAddress);
return JSValue::decode(function(newCallFrame));
}
EncodedJSValue callToNativeFunction(void* executableAddress, ExecState**, ProtoCallFrame* protoCallFrame, Register*)
{
return doCallToJavaScript<executeNative>(executableAddress, protoCallFrame);
}
#endif // ENABLE(JIT)
} // namespace JSC
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