Add a stress testing flag --background-compilation-stop-alot; add an extra check if background comp…

runtime/vm/code_generator.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 1387 matching lines @@
         field.DeoptimizeDependentCode();
         // Get next field.
         field = isolate->GetDeoptimizingBoxedField();
       }
     }
     // TODO(srdjan): Fix background compilation of regular expressions.
     if (FLAG_background_compilation) {
       if (FLAG_enable_inlining_annotations) {
         FATAL("Cannot enable inlining annotations and background compilation");
       }
+      if (FLAG_background_compilation_stop_alot) {
+        BackgroundCompiler::Stop(isolate);
+      }
       // Reduce the chance of triggering optimization while the function is
       // being optimized in the background. INT_MIN should ensure that it takes
       // long time to trigger optimization.
       // Note that the background compilation queue rejects duplicate entries.
       function.set_usage_counter(INT_MIN);
       BackgroundCompiler::EnsureInit(thread);
       ASSERT(isolate->background_compiler() != NULL);
       isolate->background_compiler()->CompileOptimized(function);
       // Continue in the same code.
       arguments.SetReturn(Code::Handle(zone, function.CurrentCode()));
@@ skipping 420 matching lines @@
   const intptr_t elm_size = old_data.ElementSizeInBytes();
   const TypedData& new_data =
       TypedData::Handle(TypedData::New(cid, new_size, Heap::kOld));
   TypedData::Copy(new_data, 0, old_data, 0, old_size * elm_size);
   typed_data_cell.SetAt(0, new_data);
   arguments.SetReturn(new_data);
 }
 
 
 }  // namespace dart