Support slots recording for compaction during incremental marking.

src/ia32/assembler-ia32-inl.h

Index: src/ia32/assembler-ia32-inl.h
diff --git a/src/ia32/assembler-ia32-inl.h b/src/ia32/assembler-ia32-inl.h
index 7217e5c2ec667d0739308e15f77f16943860b66b..bb17fbeefdef22b81f2a2595bb2ad58bc0163e09 100644
--- a/src/ia32/assembler-ia32-inl.h
+++ b/src/ia32/assembler-ia32-inl.h
@@ -94,7 +94,7 @@ void RelocInfo::set_target_address(Address target, Code* code) {
   if (code != NULL && IsCodeTarget(rmode_)) {
     Object* target_code = Code::GetCodeFromTargetAddress(target);
     code->GetHeap()->incremental_marking()->RecordWrite(
-        code, HeapObject::cast(target_code));
+        code, NULL, HeapObject::cast(target_code));

[Erik Corry, 2011/07/04 11:04:11]

Is this 'NULL' OK because we cannot compact code space?  A comment would be
good.

[Vyacheslav Egorov (Chromium), 2011/08/05 12:50:28]

Done.

   }
 }
 
@@ -123,7 +123,7 @@ void RelocInfo::set_target_object(Object* target, Code* code) {
   CPU::FlushICache(pc_, sizeof(Address));
   if (code != NULL && target->IsHeapObject()) {
     code->GetHeap()->incremental_marking()->RecordWrite(
-        code, HeapObject::cast(target));
+        code, &Memory::Object_at(pc_), HeapObject::cast(target));
   }
 }
 
@@ -157,7 +157,9 @@ void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell, Code* code) {
   Memory::Address_at(pc_) = address;
   CPU::FlushICache(pc_, sizeof(Address));
   if (code != NULL) {
-    code->GetHeap()->incremental_marking()->RecordWrite(code, cell);
+    // TODO(gc) We are not compacting cell space.
+    code->GetHeap()->incremental_marking()->RecordWrite(
+        code, NULL, cell);
   }
 }