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 "LLIntEntrypoint.h"
28#include "CodeBlock.h"
29#include "HeapInlines.h"
30#include "JITCode.h"
31#include "JSObject.h"
32#include "LLIntThunks.h"
33#include "LowLevelInterpreter.h"
34#include "MaxFrameExtentForSlowPathCall.h"
35#include "StackAlignment.h"
36#include "VM.h"
37
38namespace JSC { namespace LLInt {
39
40static void setFunctionEntrypoint(VM& vm, CodeBlock* codeBlock)
41{
42    CodeSpecializationKind kind = codeBlock->specializationKind();
43
44#if ENABLE(JIT)
45    if (vm.canUseJIT()) {
46        if (kind == CodeForCall) {
47            codeBlock->setJITCode(
48                adoptRef(new DirectJITCode(vm.getCTIStub(functionForCallEntryThunkGenerator), vm.getCTIStub(functionForCallArityCheckThunkGenerator).code(), JITCode::InterpreterThunk)));
49            return;
50        }
51        ASSERT(kind == CodeForConstruct);
52        codeBlock->setJITCode(
53            adoptRef(new DirectJITCode(vm.getCTIStub(functionForConstructEntryThunkGenerator), vm.getCTIStub(functionForConstructArityCheckThunkGenerator).code(), JITCode::InterpreterThunk)));
54        return;
55    }
56#endif // ENABLE(JIT)
57
58    UNUSED_PARAM(vm);
59    if (kind == CodeForCall) {
60        codeBlock->setJITCode(
61            adoptRef(new DirectJITCode(MacroAssemblerCodeRef::createLLIntCodeRef(llint_function_for_call_prologue), MacroAssemblerCodePtr::createLLIntCodePtr(llint_function_for_call_arity_check), JITCode::InterpreterThunk)));
62        return;
63    }
64    ASSERT(kind == CodeForConstruct);
65    codeBlock->setJITCode(
66        adoptRef(new DirectJITCode(MacroAssemblerCodeRef::createLLIntCodeRef(llint_function_for_construct_prologue), MacroAssemblerCodePtr::createLLIntCodePtr(llint_function_for_construct_arity_check), JITCode::InterpreterThunk)));
67}
68
69static void setEvalEntrypoint(VM& vm, CodeBlock* codeBlock)
70{
71#if ENABLE(JIT)
72    if (vm.canUseJIT()) {
73        codeBlock->setJITCode(
74            adoptRef(new DirectJITCode(vm.getCTIStub(evalEntryThunkGenerator), MacroAssemblerCodePtr(), JITCode::InterpreterThunk)));
75        return;
76    }
77#endif // ENABLE(JIT)
78
79    UNUSED_PARAM(vm);
80    codeBlock->setJITCode(
81        adoptRef(new DirectJITCode(MacroAssemblerCodeRef::createLLIntCodeRef(llint_eval_prologue), MacroAssemblerCodePtr(), JITCode::InterpreterThunk)));
82}
83
84static void setProgramEntrypoint(VM& vm, CodeBlock* codeBlock)
85{
86#if ENABLE(JIT)
87    if (vm.canUseJIT()) {
88        codeBlock->setJITCode(
89            adoptRef(new DirectJITCode(vm.getCTIStub(programEntryThunkGenerator), MacroAssemblerCodePtr(), JITCode::InterpreterThunk)));
90        return;
91    }
92#endif // ENABLE(JIT)
93
94    UNUSED_PARAM(vm);
95    codeBlock->setJITCode(
96        adoptRef(new DirectJITCode(MacroAssemblerCodeRef::createLLIntCodeRef(llint_program_prologue), MacroAssemblerCodePtr(), JITCode::InterpreterThunk)));
97}
98
99void setEntrypoint(VM& vm, CodeBlock* codeBlock)
100{
101    switch (codeBlock->codeType()) {
102    case GlobalCode:
103        setProgramEntrypoint(vm, codeBlock);
104        return;
105    case EvalCode:
106        setEvalEntrypoint(vm, codeBlock);
107        return;
108    case FunctionCode:
109        setFunctionEntrypoint(vm, codeBlock);
110        return;
111    }
112
113    RELEASE_ASSERT_NOT_REACHED();
114}
115
116unsigned frameRegisterCountFor(CodeBlock* codeBlock)
117{
118    ASSERT(static_cast<unsigned>(codeBlock->m_numCalleeRegisters) == WTF::roundUpToMultipleOf(stackAlignmentRegisters(), static_cast<unsigned>(codeBlock->m_numCalleeRegisters)));
119
120    return roundLocalRegisterCountForFramePointerOffset(codeBlock->m_numCalleeRegisters + maxFrameExtentForSlowPathCallInRegisters);
121}
122
123} } // namespace JSC::LLInt
124