Multi-page growing and shrinking new-space

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 103 matching lines @@
   }
 }
 
 
 void MacroAssembler::RememberedSetHelper(
     Register addr,
     Register scratch,
     SaveFPRegsMode save_fp,
     MacroAssembler::RememberedSetFinalAction and_then) {
   Label done;
+  if (FLAG_debug_code) {
+    Label ok;
+    JumpIfNotInNewSpace(addr, scratch, &ok, Label::kNear);
+    int3();
+    bind(&ok);
+  }
   // Load store buffer top.
   ExternalReference store_buffer =
       ExternalReference::store_buffer_top(isolate());
   mov(scratch, Operand::StaticVariable(store_buffer));
   // Store pointer to buffer.
   mov(Operand(scratch, 0), addr);
   // Increment buffer top.
   add(Operand(scratch), Immediate(kPointerSize));
   // Write back new top of buffer.
   mov(Operand::StaticVariable(store_buffer), scratch);
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   // Value is a data object, and it is white.  Mark it black.  Since we know
   // that the object is white we can make it black by flipping one bit.
   or_(Operand(bitmap_scratch, MemoryChunk::kHeaderSize), mask_scratch);
   bind(&done);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32