Introduce conservative sweeping.

src/builtins.cc

 // 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
@@ skipping 14 matching lines @@
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 #include "v8.h"
 
 #include "api.h"
 #include "arguments.h"
 #include "bootstrapper.h"
 #include "builtins.h"
 #include "ic-inl.h"
+#include "mark-compact.h"
 #include "vm-state-inl.h"
 
 namespace v8 {
 namespace internal {
 
 namespace {
 
 // Arguments object passed to C++ builtins.
 template <BuiltinExtraArguments extra_args>
 class BuiltinArguments : public Arguments {
@@ skipping 298 matching lines @@
     zap++;  // Header of filler must be at least one word so skip that.
     for (int i = 1; i < to_trim; i++) {
       *zap++ = Smi::FromInt(0);
     }
   }
   // Technically in new space this write might be omitted (except for
   // debug mode which iterates through the heap), but to play safer
   // we still do it.
   Heap::CreateFillerObjectAt(elms->address(), to_trim * kPointerSize);
 
+  Marking::TransferMark(elms->address(),

[Erik Corry, 2011/01/19 13:46:48]

Comment?

[Vyacheslav Egorov (Chromium), 2011/01/20 16:40:21]

Done.

+                        elms->address() + to_trim * kPointerSize);
+
   former_start[to_trim] = Heap::fixed_array_map();
   former_start[to_trim + 1] = Smi::FromInt(len - to_trim);
 
   return FixedArray::cast(HeapObject::FromAddress(
       elms->address() + to_trim * kPointerSize));
 }
 
 
 static bool ArrayPrototypeHasNoElements(Context* global_context,
                                         JSObject* array_proto) {
@@ skipping 1234 matching lines @@
       if (entry->contains(pc)) {
         return names_[i];
       }
     }
   }
   return NULL;
 }
 
 
 } }  // namespace v8::internal