When flag --nouse-osr is set, don't allow osr from hidden runtime calls.

src/runtime.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdlib.h>
 #include <limits>
 
 #include "v8.h"
 
 #include "accessors.h"
@@ skipping 8598 matching lines @@
   function->MarkForOptimization();
 
   Code* unoptimized = function->shared()->code();
   if (args.length() == 2 &&
       unoptimized->kind() == Code::FUNCTION) {
     CONVERT_ARG_HANDLE_CHECKED(String, type, 1);
     if (type->IsOneByteEqualTo(STATIC_ASCII_VECTOR("osr"))) {
       // Start patching from the currently patched loop nesting level.
       int current_level = unoptimized->allow_osr_at_loop_nesting_level();
       ASSERT(BackEdgeTable::Verify(isolate, unoptimized, current_level));
-      for (int i = current_level + 1; i <= Code::kMaxLoopNestingMarker; i++) {
-        unoptimized->set_allow_osr_at_loop_nesting_level(i);
-        isolate->runtime_profiler()->AttemptOnStackReplacement(*function);
+      if (FLAG_use_osr) {
+        for (int i = current_level + 1; i <= Code::kMaxLoopNestingMarker; i++) {
+          unoptimized->set_allow_osr_at_loop_nesting_level(i);
+          isolate->runtime_profiler()->AttemptOnStackReplacement(*function);
+        }
       }
     } else if (type->IsOneByteEqualTo(STATIC_ASCII_VECTOR("concurrent")) &&
                isolate->concurrent_recompilation_enabled()) {
       function->MarkForConcurrentOptimization();
     }
   }
 
   return isolate->heap()->undefined_value();
 }
 
@@ skipping 80 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_CompileForOnStackReplacement) {
   HandleScope scope(isolate);
   ASSERT(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0);
   Handle<Code> caller_code(function->shared()->code());
 
   // We're not prepared to handle a function with arguments object.
   ASSERT(!function->shared()->uses_arguments());
 
+  RUNTIME_ASSERT(FLAG_use_osr);
+
   // Passing the PC in the javascript frame from the caller directly is
   // not GC safe, so we walk the stack to get it.
   JavaScriptFrameIterator it(isolate);
   JavaScriptFrame* frame = it.frame();
   if (!caller_code->contains(frame->pc())) {
     // Code on the stack may not be the code object referenced by the shared
     // function info.  It may have been replaced to include deoptimization data.
     caller_code = Handle<Code>(frame->LookupCode());
   }
 
@@ skipping 6386 matching lines @@
   }
   return NULL;
 }
 
 
 const Runtime::Function* Runtime::FunctionForId(Runtime::FunctionId id) {
   return &(kIntrinsicFunctions[static_cast<int>(id)]);
 }
 
 } }  // namespace v8::internal