Do not mark from native code. Check color and call incremental marker instead.

src/ppc/code-stubs-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_PPC
 
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
@@ skipping 4214 matching lines @@
                      regs_.scratch1(),  // Scratch.
                      MemoryChunk::kSkipEvacuationSlotsRecordingMask, eq,
                      &need_incremental);
 
     __ bind(&ensure_not_white);
   }
 
   // We need extra registers for this, so we push the object and the address
   // register temporarily.
   __ Push(regs_.object(), regs_.address());
-  __ EnsureNotWhite(regs_.scratch0(),  // The value.
-                    regs_.scratch1(),  // Scratch.
-                    regs_.object(),    // Scratch.
-                    regs_.address(),   // Scratch.
-                    &need_incremental_pop_scratch);
+  __ JumpIfWhite(regs_.scratch0(),  // The value.
+                 regs_.scratch1(),  // Scratch.
+                 regs_.object(),    // Scratch.
+                 regs_.address(),   // Scratch.
+                 &need_incremental_pop_scratch);
   __ Pop(regs_.object(), regs_.address());
 
   regs_.Restore(masm);
   if (on_no_need == kUpdateRememberedSetOnNoNeedToInformIncrementalMarker) {
     __ RememberedSetHelper(object(), address(), value(), save_fp_regs_mode(),
                            MacroAssembler::kReturnAtEnd);
   } else {
     __ Ret();
   }
 
@@ skipping 1397 matching lines @@
                            kStackUnwindSpace, NULL,
                            MemOperand(fp, 6 * kPointerSize), NULL);
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC