1 files changed, 67 insertions, 0 deletions
diff --git a/src/jdk/nashorn/internal/runtime/events/RecompilationEvent.java b/src/jdk/nashorn/internal/runtime/events/RecompilationEvent.java
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+++ b/src/jdk/nashorn/internal/runtime/events/RecompilationEvent.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2010, 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package jdk.nashorn.internal.runtime.events;
+
+import java.util.logging.Level;
+import jdk.nashorn.internal.runtime.Context;
+import jdk.nashorn.internal.runtime.RecompilableScriptFunctionData;
+import jdk.nashorn.internal.runtime.RewriteException;
+
+/**
+ * Subclass of runtime event for {@link RewriteException}. In order not
+ * to leak memory, RewriteExceptions get their return value destroyed
+ * and nulled out during recompilation. If we are running with event
+ * logging enabled, we need to retain the returnValue, hence the extra
+ * field
+ */
+public final class RecompilationEvent extends RuntimeEvent<RewriteException> {
+
+    private final Object returnValue;
+
+    /**
+     * Constructor
+     *
+     * @param level            logging level
+     * @param rewriteException rewriteException wrapped by this RuntimEvent
+     * @param returnValue      rewriteException return value - as we don't want to make
+     *     {@code RewriteException.getReturnValueNonDestructive()} public, we pass it as
+     *     an extra parameter, rather than querying the getter from another package.
+     */
+    public RecompilationEvent(final Level level, final RewriteException rewriteException, final Object returnValue) {
+        super(level, rewriteException);
+        assert Context.getContext().getLogger(RecompilableScriptFunctionData.class).isEnabled() :
+            "Unit test/instrumentation purpose only: RecompilationEvent instances should not be created without '--log=recompile', or we will leak memory in the general case";
+        this.returnValue = returnValue;
+    }
+
+    /**
+     * Get the preserved return value for the RewriteException
+     * @return return value
+     */
+    public Object getReturnValue() {
+        return returnValue;
+    }
+}