Notify collector about lazily deoptimized code objects.

src/x64/deoptimizer-x64.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 186 matching lines @@
   // Destroy the code which is not supposed to run again.
   ZapCodeRange(previous_pc, jump_table_address);
 #endif
 
   // Add the deoptimizing code to the list.
   DeoptimizingCodeListNode* node = new DeoptimizingCodeListNode(code);
   DeoptimizerData* data = code->GetIsolate()->deoptimizer_data();
   node->set_next(data->deoptimizing_code_list_);
   data->deoptimizing_code_list_ = node;
 
+  // We might be in the middle of incremental marking with compaction.
+  // Tell collector to treat this code object in a special way and
+  // ignore all slots that might have been recorded on it.
+  isolate->heap()->mark_compact_collector()->InvalidateCode(code);
+
   // Set the code for the function to non-optimized version.
   function->ReplaceCode(function->shared()->code());
 
   if (FLAG_trace_deopt) {
     PrintF("[forced deoptimization: ");
     function->PrintName();
     PrintF(" / %" V8PRIxPTR "]\n", reinterpret_cast<intptr_t>(function));
 #ifdef DEBUG
     if (FLAG_print_code) {
       code->PrintLn();
@@ skipping 637 matching lines @@
   }
   __ bind(&done);
 }
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64