llint/LLIntEntrypoint.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 "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
  38 namespace JSC { namespace LLInt {
  39
  40 static 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
  69 static 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
  84 static 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
  99 void 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
 116 unsigned 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