Expose optimization info via runtime functions

src/runtime.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 7406 matching lines @@
 RUNTIME_FUNCTION(MaybeObject*, Runtime_OptimizeFunctionOnNextCall) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
   if (!function->IsOptimizable()) return isolate->heap()->undefined_value();
   function->MarkForLazyRecompilation();
   return isolate->heap()->undefined_value();
 }
 
 
+RUNTIME_FUNCTION(MaybeObject*, Runtime_IsOptimizedFunction) {

[danno, 2011/05/04 07:47:04]

Perhaps this should be called FunctionOptimizationStatus

[Jakob Kummerow, 2011/05/06 15:58:15]

Done.

+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  if (!V8::UseCrankshaft()) {
+    return Smi::FromInt(4);  // 4 == "never".
+  }
+  if (FLAG_always_opt) {
+    return Smi::FromInt(3);  // 3 == "always".
+  }
+  CONVERT_ARG_CHECKED(JSFunction, function, 0);
+  return function->IsOptimized() ? Smi::FromInt(1)   // 1 == "yes".
+                                 : Smi::FromInt(2);  // 2 == "no".
+}
+
+
+RUNTIME_FUNCTION(MaybeObject*, Runtime_GetOptimizationCount) {
+  HandleScope scope(isolate);
+  ASSERT(args.length() == 1);
+  CONVERT_ARG_CHECKED(JSFunction, function, 0);
+  return Smi::FromInt(function->shared()->opt_count());
+}
+
+
 RUNTIME_FUNCTION(MaybeObject*, Runtime_CompileForOnStackReplacement) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_CHECKED(JSFunction, function, 0);
 
   // We're not prepared to handle a function with arguments object.
   ASSERT(!function->shared()->scope_info()->HasArgumentsShadow());
 
   // We have hit a back edge in an unoptimized frame for a function that was
   // selected for on-stack replacement.  Find the unoptimized code object.
@@ skipping 4545 matching lines @@
   } else {
     // 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(false);
   }
 }
 
 
 } }  // namespace v8::internal