Count-based profiling for primitive functions (hidden behind a flag)

src/runtime.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 8401 matching lines @@
   ASSERT(function->is_compiled());
   return function->code();
 }
 
 
 RUNTIME_FUNCTION(MaybeObject*, Runtime_LazyRecompile) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   Handle<JSFunction> function = args.at<JSFunction>(0);
 
+  function->shared()->set_profiler_ticks(0);
+
   // If the function is not compiled ignore the lazy
   // recompilation. This can happen if the debugger is activated and
   // the function is returned to the not compiled state.
   if (!function->shared()->is_compiled()) {
     function->ReplaceCode(function->shared()->code());
     return function->code();
   }
 
   // If the function is not optimizable or debugger is active continue using the
   // code from the full compiler.
@@ skipping 5224 matching lines @@
     // Handle last resort GC and make sure to allow future allocations
     // to grow the heap without causing GCs (if possible).
     isolate->counters()->gc_last_resort_from_js()->Increment();
     isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags,
                                        "Runtime::PerformGC");
   }
 }
 
 
 } }  // namespace v8::internal