Basic implementation of incremental marking.

src/ia32/macro-assembler-ia32.cc

 // Copyright 2011 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 30 matching lines @@
 // -------------------------------------------------------------------------
 // MacroAssembler implementation.
 
 MacroAssembler::MacroAssembler(void* buffer, int size)
     : Assembler(buffer, size),
       generating_stub_(false),
       allow_stub_calls_(true),
       code_object_(Heap::undefined_value()) {
 }
 
+
+void MacroAssembler::IncrementalMarkingRecordWrite(Register object,
+                                                   Register value,
+                                                   Register scratch) {
+  ASSERT(!object.is(scratch));
+  ASSERT(!value.is(scratch));
+  push(eax);
+  push(ecx);
+  push(edx);
+  PrepareCallCFunction(2, scratch);
+  mov(Operand(esp, 0 * kPointerSize), object);
+  mov(Operand(esp, 1 * kPointerSize), value);
+  CallCFunction(
+      ExternalReference::incremental_marking_record_write_function(), 2);
+  pop(edx);
+  pop(ecx);
+  pop(eax);
+}
+
+
 void MacroAssembler::RecordWriteHelper(Register object,
                                        Register addr,
                                        Register scratch,
                                        SaveFPRegsMode save_fp) {
   if (FLAG_debug_code) {
     // Check that the object is not in new space.
     Label not_in_new_space;
     InNewSpace(object, scratch, not_equal, &not_in_new_space);
     Abort("new-space object passed to RecordWriteHelper");
     bind(&not_in_new_space);
@@ skipping 20 matching lines @@
 }
 
 
 void MacroAssembler::RecordWrite(Register object,
                                  int offset,
                                  Register value,
                                  Register scratch,
                                  SaveFPRegsMode save_fp) {
   // First, check if a write barrier is even needed. The tests below
   // catch stores of Smis and stores into young gen.
-  NearLabel done;
+  Label done;
 
   // Skip barrier if writing a smi.
   ASSERT_EQ(0, kSmiTag);
   test(value, Immediate(kSmiTagMask));
   j(zero, &done);
 
+  IncrementalMarkingRecordWrite(object, value, scratch);
+
   InNewSpace(object, value, equal, &done);
 
   // The offset is relative to a tagged or untagged HeapObject pointer,
   // so either offset or offset + kHeapObjectTag must be a
   // multiple of kPointerSize.
   ASSERT(IsAligned(offset, kPointerSize) ||
          IsAligned(offset + kHeapObjectTag, kPointerSize));
 
   Register dst = scratch;
   if (offset != 0) {
@@ skipping 1900 matching lines @@
 
   // Check that the code was patched as expected.
   ASSERT(masm_.pc_ == address_ + size_);
   ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32