jit/JITThunks.cpp

   1 /*
   2  * Copyright (C) 2012 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 "JITThunks.h"
  28
  29 #if ENABLE(JIT)
  30
  31 #include "Executable.h"
  32 #include "JIT.h"
  33 #include "VM.h"
  34 #include "Operations.h"
  35
  36 namespace JSC {
  37
  38 JITThunks::JITThunks()
  39     : m_hostFunctionStubMap(adoptPtr(new HostFunctionStubMap))
  40 {
  41 }
  42
  43 JITThunks::~JITThunks()
  44 {
  45 }
  46
  47 MacroAssemblerCodePtr JITThunks::ctiNativeCall(VM* vm)
  48 {
  49 #if ENABLE(LLINT)
  50     if (!vm->canUseJIT())
  51         return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_call_trampoline);
  52 #endif
  53     return ctiStub(vm, nativeCallGenerator).code();
  54 }
  55 MacroAssemblerCodePtr JITThunks::ctiNativeConstruct(VM* vm)
  56 {
  57 #if ENABLE(LLINT)
  58     if (!vm->canUseJIT())
  59         return MacroAssemblerCodePtr::createLLIntCodePtr(llint_native_construct_trampoline);
  60 #endif
  61     return ctiStub(vm, nativeConstructGenerator).code();
  62 }
  63
  64 MacroAssemblerCodeRef JITThunks::ctiStub(VM* vm, ThunkGenerator generator)
  65 {
  66     CTIStubMap::AddResult entry = m_ctiStubMap.add(generator, MacroAssemblerCodeRef());
  67     if (entry.isNewEntry)
  68         entry.iterator->value = generator(vm);
  69     return entry.iterator->value;
  70 }
  71
  72 NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, NativeFunction constructor)
  73 {
  74     if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(*function, *constructor)))
  75         return nativeExecutable;
  76
  77     NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, JIT::compileCTINativeCall(vm, function), function, MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), constructor, NoIntrinsic);
  78     weakAdd(*m_hostFunctionStubMap, std::make_pair(*function, *constructor), PassWeak<NativeExecutable>(nativeExecutable));
  79     return nativeExecutable;
  80 }
  81
  82 NativeExecutable* JITThunks::hostFunctionStub(VM* vm, NativeFunction function, ThunkGenerator generator, Intrinsic intrinsic)
  83 {
  84     if (NativeExecutable* nativeExecutable = m_hostFunctionStubMap->get(std::make_pair(*function, *callHostFunctionAsConstructor)))
  85         return nativeExecutable;
  86
  87     MacroAssemblerCodeRef code;
  88     if (generator) {
  89         if (vm->canUseJIT())
  90             code = generator(vm);
  91         else
  92             code = MacroAssemblerCodeRef();
  93     } else
  94         code = JIT::compileCTINativeCall(vm, function);
  95
  96     NativeExecutable* nativeExecutable = NativeExecutable::create(*vm, code, function, MacroAssemblerCodeRef::createSelfManagedCodeRef(ctiNativeConstruct(vm)), callHostFunctionAsConstructor, intrinsic);
  97     weakAdd(*m_hostFunctionStubMap, std::make_pair(*function, *callHostFunctionAsConstructor), PassWeak<NativeExecutable>(nativeExecutable));
  98     return nativeExecutable;
  99 }
 100
 101 void JITThunks::clearHostFunctionStubs()
 102 {
 103     m_hostFunctionStubMap.clear();
 104 }
 105
 106 } // namespace JSC
 107
 108 #endif // ENABLE(JIT)