builtins.h.svn-base

Google浏览器V8内核代码

// Copyright 2006-2008 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * 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.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "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 THE COPYRIGHT
// OWNER 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.

#ifndef V8_BUILTINS_H_
#define V8_BUILTINS_H_

namespace v8 { namespace internal {

// Define list of builtins implemented in C.
#define BUILTIN_LIST_C(V)                          \
  V(Illegal)                                       \
                                                   \
  V(EmptyFunction)                                 \
                                                   \
  V(ArrayCode)                                     \
                                                   \
  V(ArrayPush)                                     \
  V(ArrayPop)                                      \
                                                   \
  V(HandleApiCall)                                 \
  V(HandleApiCallAsFunction)


// Define list of builtins implemented in assembly.
#define BUILTIN_LIST_A(V)                                      \
  V(ArgumentsAdaptorTrampoline, BUILTIN, UNINITIALIZED)        \
  V(JSConstructCall,            BUILTIN, UNINITIALIZED)        \
  V(JSEntryTrampoline,          BUILTIN, UNINITIALIZED)        \
  V(JSConstructEntryTrampoline, BUILTIN, UNINITIALIZED)        \
                                                               \
  V(Return_DebugBreak,          BUILTIN, DEBUG_BREAK)          \
  V(Return_DebugBreakEntry,     BUILTIN, DEBUG_BREAK)          \
  V(ConstructCall_DebugBreak,   BUILTIN, DEBUG_BREAK)          \
  V(StubNoRegisters_DebugBreak, BUILTIN, DEBUG_BREAK)          \
                                                               \
  V(LoadIC_Miss,                BUILTIN, UNINITIALIZED)        \
  V(KeyedLoadIC_Miss,           BUILTIN, UNINITIALIZED)        \
  V(StoreIC_Miss,               BUILTIN, UNINITIALIZED)        \
  V(KeyedStoreIC_Miss,          BUILTIN, UNINITIALIZED)        \
                                                               \
  V(LoadIC_Initialize,          LOAD_IC, UNINITIALIZED)        \
  V(LoadIC_PreMonomorphic,      LOAD_IC, PREMONOMORPHIC)       \
  V(LoadIC_Normal,              LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_ArrayLength,         LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_ShortStringLength,   LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_MediumStringLength,  LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_LongStringLength,    LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_FunctionPrototype,   LOAD_IC, MONOMORPHIC)          \
  V(LoadIC_Megamorphic,         LOAD_IC, MEGAMORPHIC)          \
  V(LoadIC_DebugBreak,          LOAD_IC, DEBUG_BREAK)          \
                                                               \
  V(KeyedLoadIC_Initialize,     KEYED_LOAD_IC, UNINITIALIZED)  \
  V(KeyedLoadIC_PreMonomorphic, KEYED_LOAD_IC, PREMONOMORPHIC) \
  V(KeyedLoadIC_Generic,        KEYED_LOAD_IC, MEGAMORPHIC)    \
  V(KeyedLoadIC_DebugBreak,     KEYED_LOAD_IC, DEBUG_BREAK)    \
                                                               \
  V(StoreIC_Initialize,         STORE_IC, UNINITIALIZED)       \
  V(StoreIC_Megamorphic,        STORE_IC, MEGAMORPHIC)         \
  V(StoreIC_DebugBreak,         STORE_IC, DEBUG_BREAK)         \
                                                               \
  V(KeyedStoreIC_Initialize,    KEYED_STORE_IC, UNINITIALIZED) \
  V(KeyedStoreIC_Generic,       KEYED_STORE_IC, MEGAMORPHIC)   \
  V(KeyedStoreIC_DebugBreak,    KEYED_STORE_IC, DEBUG_BREAK)   \
                                                               \
  /* Uses KeyedLoadIC_Initialize; must be after in list. */    \
  V(FunctionCall,               BUILTIN, UNINITIALIZED)        \
  V(FunctionApply,              BUILTIN, UNINITIALIZED)


// Define list of builtins implemented in JavaScript.
#define BUILTINS_LIST_JS(V)    \
  V(EQUALS, 1)                 \
  V(STRICT_EQUALS, 1)          \
  V(COMPARE, 2)                \
  V(ADD, 1)                    \
  V(SUB, 1)                    \
  V(MUL, 1)                    \
  V(DIV, 1)                    \
  V(MOD, 1)                    \
  V(INC, 0)                    \
  V(DEC, 0)                    \
  V(BIT_OR, 1)                 \
  V(BIT_AND, 1)                \
  V(BIT_XOR, 1)                \
  V(UNARY_MINUS, 0)            \
  V(BIT_NOT, 0)                \
  V(SHL, 1)                    \
  V(SAR, 1)                    \
  V(SHR, 1)                    \
  V(DELETE, 1)                 \
  V(IN, 1)                     \
  V(INSTANCE_OF, 1)            \
  V(GET_KEYS, 0)               \
  V(FILTER_KEY, 1)             \
  V(CALL_NON_FUNCTION, 0)      \
  V(TO_OBJECT, 0)              \
  V(TO_NUMBER, 0)              \
  V(TO_STRING, 0)              \
  V(APPLY_PREPARE, 1)          \
  V(APPLY_OVERFLOW, 1)


class ObjectVisitor;


class Builtins : public AllStatic {
 public:
  // Generate all builtin code objects. Should be called once during
  // VM initialization.
  static void Setup(bool create_heap_objects);
  static void TearDown();

  // Garbage collection support.
  static void IterateBuiltins(ObjectVisitor* v);

  // Disassembler support.
  static const char* Lookup(byte* pc);

  enum Name {
#define DEF_ENUM_C(name) name,
#define DEF_ENUM_A(name, kind, state) name,
    BUILTIN_LIST_C(DEF_ENUM_C)
    BUILTIN_LIST_A(DEF_ENUM_A)
#undef DEF_ENUM_C
#undef DEF_ENUM_A
    builtin_count
  };

  enum CFunctionId {
#define DEF_ENUM_C(name) c_##name,
    BUILTIN_LIST_C(DEF_ENUM_C)
#undef DEF_ENUM_C
    cfunction_count
  };

  enum JavaScript {
#define DEF_ENUM(name, ignore) name,
    BUILTINS_LIST_JS(DEF_ENUM)
#undef DEF_ENUM
    id_count
  };

  static bool IsConstructCall(Address pc);
  static bool IsArgumentsAdaptorCall(Address pc);

  static Code* builtin(Name name) {
    // Code::cast cannot be used here since we access builtins
    // during the marking phase of mark sweep. See IC::Clear.
    return reinterpret_cast<Code*>(builtins_[name]);
  }

  static Address builtin_address(Name name) {
    return reinterpret_cast<Address>(&builtins_[name]);
  }

  static Address c_function_address(CFunctionId id) {
    return c_functions_[id];
  }

  static const char* GetName(JavaScript id) { return javascript_names_[id]; }
  static int GetArgumentsCount(JavaScript id) { return javascript_argc_[id]; }
  static Handle<Code> GetCode(JavaScript id, bool* resolved);
  static int NumberOfJavaScriptBuiltins() { return id_count; }

  // Called from stub-cache.cc.
  static void Generate_CallIC_DebugBreak(MacroAssembler* masm);

  static Object* builtin_passed_function;

 private:
  // The external C++ functions called from the code.
  static Address c_functions_[cfunction_count];

  // Note: These are always Code objects, but to conform with
  // IterateBuiltins() above which assumes Object**'s for the callback
  // function f, we use an Object* array here.
  static Object* builtins_[builtin_count];
  static const char* names_[builtin_count];
  static const char* javascript_names_[id_count];
  static int javascript_argc_[id_count];

  // The offset from the beginning of the JSConstructCall builtin code
  // object to the return address after the call. Used for determining
  // if a call is a constructor invocation.
  static int construct_call_pc_offset_;
  static int arguments_adaptor_call_pc_offset_;

  static void Generate_Adaptor(MacroAssembler* masm, CFunctionId id);
  static void Generate_JSConstructCall(MacroAssembler* masm);
  static void Generate_JSEntryTrampoline(MacroAssembler* masm);
  static void Generate_JSConstructEntryTrampoline(MacroAssembler* masm);
  static void Generate_ArgumentsAdaptorTrampoline(MacroAssembler* masm);

  static void Generate_FunctionCall(MacroAssembler* masm);
  static void Generate_FunctionApply(MacroAssembler* masm);

  static void Generate_LoadIC_DebugBreak(MacroAssembler* masm);
  static void Generate_StoreIC_DebugBreak(MacroAssembler* masm);
  static void Generate_KeyedLoadIC_DebugBreak(MacroAssembler* masm);
  static void Generate_KeyedStoreIC_DebugBreak(MacroAssembler* masm);
  static void Generate_ConstructCall_DebugBreak(MacroAssembler* masm);
  static void Generate_Return_DebugBreak(MacroAssembler* masm);
  static void Generate_Return_DebugBreakEntry(MacroAssembler* masm);
  static void Generate_StubNoRegisters_DebugBreak(MacroAssembler* masm);
};

} }  // namespace v8::internal

#endif  // V8_BUILTINS_H_