Check code kind when resetting profiler ticks.

src/objects.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 7851 matching lines @@
   ASSERT_EQ(builtins->builtin(Builtins::kJSConstructStubGeneric),
             *RawField(this, kConstructStubOffset));
   set_construct_stub(builtins->builtin(Builtins::kJSConstructStubCountdown));
   // The map survived the gc, so there may be objects referencing it.
   set_live_objects_may_exist(true);
 }
 
 
 void SharedFunctionInfo::ResetForNewContext(int new_ic_age) {
   code()->ClearInlineCaches();
-  code()->set_profiler_ticks(0);
   set_ic_age(new_ic_age);
-  if (optimization_disabled() && opt_count() >= Compiler::kDefaultMaxOptCount) {
-    // Re-enable optimizations if they were disabled due to opt_count limit.
-    set_optimization_disabled(false);
-    code()->set_optimizable(true);
+  if (code()->kind() == Code::FUNCTION) {

[ulan, 2012/04/02 12:52:30]

Another kind that can appear here is Code::BUILTIN.
Builtins implemented in assembly have such kind.
 
Builtins implemented in javasript have kind Code::FUNCTION.

For example, d8 outputs the following for the EQUALS builtin implemented in
javascript:

--- Code ---
kind = FUNCTION
name = EQUALS
Instructions (size = 2076)
                  [ function compiled by full code generator

+    code()->set_profiler_ticks(0);
+    if (optimization_disabled() &&
+        opt_count() >= Compiler::kDefaultMaxOptCount) {
+      // Re-enable optimizations if they were disabled due to opt_count limit.
+      set_optimization_disabled(false);
+      code()->set_optimizable(true);
+    }
+    set_opt_count(0);
   }
-  set_opt_count(0);
 }
 
 
 static void GetMinInobjectSlack(Map* map, void* data) {
   int slack = map->unused_property_fields();
   if (*reinterpret_cast<int*>(data) > slack) {
     *reinterpret_cast<int*>(data) = slack;
   }
 }
 
@@ skipping 5073 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal