8030955: assert(_prologue != NULL) failed: prologue pointer must be initialized

Summary: Return immediately if _prologue == NULL, instead of asserting
Reviewed-by: ccheung, coleenp

src/share/vm/runtime/perfMemory.cpp

 /*
- * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2001, 2014, 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
@@ -155,7 +155,7 @@ void PerfMemory::initialize() {
 
 void PerfMemory::destroy() {
 
-  assert(_prologue != NULL, "prologue pointer must be initialized");
+  if (_prologue == NULL) return;
 
   if (_start != NULL && _prologue->overflow != 0) {
 

test/runtime/PerfMemDestroy/PerfMemDestroy.java

+/*
+ * Copyright (c) 2014, 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * @bug 8030955
+ * @summary Allow multiple calls to PerfMemory::destroy() without asserting.
+ * @library /testlibrary
+ * @run main PerfMemDestroy
+ */
+
+import com.oracle.java.testlibrary.*;
+
+public class PerfMemDestroy {
+    public static void main(String args[]) throws Throwable {
+        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder("-XX:+PerfAllowAtExitRegistration", "-version");
+        OutputAnalyzer output = new OutputAnalyzer(pb.start());
+        output.shouldHaveExitValue(0);
+    }
+}