src/share/vm/compiler/compileBroker.cpp

rev 8983 : 8222670: pathological case of JIT recompilation and code cache bloat
Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: thartmann, sgehwolf, phh, andrew

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2019, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -749,12 +749,14 @@
   CompileTask* task;
   {
     No_Safepoint_Verifier nsv;
     task = CompilationPolicy::policy()->select_task(this);
   }
+  if (task != NULL) {
   remove(task);
   purge_stale_tasks(); // may temporarily release MCQ lock
+  }
   return task;
 }
 
 // Clean & deallocate stale compile tasks.
 // Temporarily releases MethodCompileQueue lock.