Profiler experiments: be more careful when accessing TypeFeedbackInfo

src/ic.cc

 // Copyright 2012 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 297 matching lines @@
           new_state == UNINITIALIZED || new_state == PREMONOMORPHIC;
       int delta = 0;
       if (was_uninitialized && !is_uninitialized) {
         delta = 1;
       } else if (!was_uninitialized && is_uninitialized) {
         delta = -1;
       }
       if (delta != 0) {
         Code* host = target->GetHeap()->isolate()->
             inner_pointer_to_code_cache()->GetCacheEntry(address)->code;
-        TypeFeedbackInfo* info =
-            TypeFeedbackInfo::cast(host->type_feedback_info());
-        info->set_ic_with_typeinfo_count(
-            info->ic_with_typeinfo_count() + delta);
+        // Not all Code objects have TypeFeedbackInfo.
+        if (host->type_feedback_info()->IsTypeFeedbackInfo()) {
+          TypeFeedbackInfo* info =
+              TypeFeedbackInfo::cast(host->type_feedback_info());
+          info->set_ic_with_typeinfo_count(
+              info->ic_with_typeinfo_count() + delta);
+        }
       }
     }
   }
   if (FLAG_watch_ic_patching) {
     Isolate::Current()->runtime_profiler()->NotifyICChanged();
     // We do not want to optimize until the ICs have settled down,
     // so when they are patched, we postpone optimization for the
     // current function and the functions above it on the stack that
     // might want to inline this one.
     StackFrameIterator it;
@@ skipping 2221 matching lines @@
 #undef ADDR
 };
 
 
 Address IC::AddressFromUtilityId(IC::UtilityId id) {
   return IC_utilities[id];
 }
 
 
 } }  // namespace v8::internal