Write buffer based write barrier for IA32 and Crankshaft. Currently...

src/ia32/macro-assembler-ia32.h

 // Copyright 2010 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
@@ skipping 43 matching lines @@
 class PostCallGenerator;
 
 // MacroAssembler implements a collection of frequently used macros.
 class MacroAssembler: public Assembler {
  public:
   MacroAssembler(void* buffer, int size);
 
   // ---------------------------------------------------------------------------
   // GC Support
 
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
   // For page containing |object| mark region covering |addr| dirty.
   // RecordWriteHelper only works if the object is not in new
   // space.
   void RecordWriteHelper(Register object,
                          Register addr,
-                         Register scratch);
+                         Register scratch,
+                         SaveFPRegsMode save_fp);
 
   // Check if object is in new space.
   // scratch can be object itself, but it will be clobbered.
   template <typename LabelType>
   void InNewSpace(Register object,
                   Register scratch,
                   Condition cc,  // equal for new space, not_equal otherwise.
                   LabelType* branch);
 
   // For page containing |object| mark region covering [object+offset]
   // dirty. |object| is the object being stored into, |value| is the
   // object being stored. If offset is zero, then the scratch register
   // contains the array index into the elements array represented as a
   // Smi. All registers are clobbered by the operation. RecordWrite
   // filters out smis so it does not update the write barrier if the
   // value is a smi.
   void RecordWrite(Register object,
                    int offset,
                    Register value,
-                   Register scratch);
+                   Register scratch,
+                   SaveFPRegsMode save_fp);
 
   // For page containing |object| mark region covering |address|
   // dirty. |object| is the object being stored into, |value| is the
   // object being stored. All registers are clobbered by the
   // operation. RecordWrite filters out smis so it does not update the
   // write barrier if the value is a smi.
   void RecordWrite(Register object,
                    Register address,
-                   Register value);
-#endif
+                   Register value,
+                   SaveFPRegsMode save_fp);
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
   // ---------------------------------------------------------------------------
   // Debugger Support
 
   void DebugBreak();
 #endif
 
   // ---------------------------------------------------------------------------
   // Activation frames
@@ skipping 543 matching lines @@
 
   // Helper for PopHandleScope.  Allowed to perform a GC and returns
   // NULL if gc_allowed.  Does not perform a GC if !gc_allowed, and
   // possibly returns a failure object indicating an allocation failure.
   MUST_USE_RESULT MaybeObject* PopHandleScopeHelper(Register saved,
                                                     Register scratch,
                                                     bool gc_allowed);
 };
 
 
-#ifdef ENABLE_CARDMARKING_WRITE_BARRIER
 template <typename LabelType>
 void MacroAssembler::InNewSpace(Register object,
                                 Register scratch,
                                 Condition cc,
                                 LabelType* branch) {
   ASSERT(cc == equal || cc == not_equal);
   if (Serializer::enabled()) {
     // Can't do arithmetic on external references if it might get serialized.
     mov(scratch, Operand(object));
     // The mask isn't really an address.  We load it as an external reference in
     // case the size of the new space is different between the snapshot maker
     // and the running system.
     and_(Operand(scratch), Immediate(ExternalReference::new_space_mask()));
     cmp(Operand(scratch), Immediate(ExternalReference::new_space_start()));
     j(cc, branch);
   } else {
     int32_t new_space_start = reinterpret_cast<int32_t>(
         ExternalReference::new_space_start().address());
     lea(scratch, Operand(object, -new_space_start));
     and_(scratch, Heap::NewSpaceMask());
     j(cc, branch);
   }
 }
-#endif
 
 
 // The code patcher is used to patch (typically) small parts of code e.g. for
 // debugging and other types of instrumentation. When using the code patcher
 // the exact number of bytes specified must be emitted. Is not legal to emit
 // relocation information. If any of these constraints are violated it causes
 // an assertion.
 class CodePatcher {
  public:
   CodePatcher(byte* address, int size);
@@ skipping 70 matching lines @@
   }                                                                       \
   masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_MACRO_ASSEMBLER_IA32_H_