8146961: Fix PermGen memory leaks caused by static final Exceptions

Reviewed-by: joehw, shade, clanger, plevart

3 files changed, 50 insertions, 26 deletions

diff --git a/src/com/sun/org/apache/xerces/internal/dom/AbortException.java b/src/com/sun/org/apache/xerces/internal/dom/AbortException.java
new file mode 100644
index 0000000..3e178dd
--- /dev/null
+++ b/src/com/sun/org/apache/xerces/internal/dom/AbortException.java
@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016, 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 com.sun.org.apache.xerces.internal.dom;
+
+public class AbortException extends RuntimeException {
+
+        private static final long serialVersionUID = 2608302175475740417L;
+
+        /**
+         * Constructor AbortException
+         */
+        public AbortException() { super(null, null, false, false); }
+}
diff --git a/src/com/sun/org/apache/xerces/internal/dom/DOMNormalizer.java b/src/com/sun/org/apache/xerces/internal/dom/DOMNormalizer.java
index 3758f39..c4268dc 100644
--- a/src/com/sun/org/apache/xerces/internal/dom/DOMNormalizer.java
+++ b/src/com/sun/org/apache/xerces/internal/dom/DOMNormalizer.java
@@ -26,6 +26,7 @@ import java.util.ArrayList;
 import java.io.StringReader;
 import java.util.Vector;
 
+import com.sun.org.apache.xerces.internal.dom.AbortException;
 import com.sun.org.apache.xerces.internal.impl.Constants;
 import com.sun.org.apache.xerces.internal.impl.RevalidationHandler;
 import com.sun.org.apache.xerces.internal.impl.dtd.DTDGrammar;
@@ -158,11 +159,6 @@ public class DOMNormalizer implements XMLDocumentHandler {
     // attribute value normalization
     final XMLString fNormalizedValue = new XMLString(new char[16], 0, 0);
 
-    /**
-     * If the user stops the process, this exception will be thrown.
-     */
-    public static final RuntimeException abort = new RuntimeException();
-
     //DTD validator
     private XMLDTDValidator fDTDValidator;
 
@@ -243,11 +239,10 @@ public class DOMNormalizer implements XMLDocumentHandler {
                                         XMLGrammarDescription.XML_SCHEMA, fValidationHandler);
                                 fValidationHandler = null;
                         }
-                }
-                catch (RuntimeException e) {
-            if( e==abort )
-                return; // processing aborted by the user
-            throw e;    // otherwise re-throw.
+                } catch (AbortException e) {
+                    return;
+                } catch (RuntimeException e) {
+                    throw e;    // otherwise re-throw.
                 }
 
         }
@@ -1372,10 +1367,10 @@ public class DOMNormalizer implements XMLDocumentHandler {
             error.fRelatedData = locator.fRelatedNode;
 
             if(!errorHandler.handleError(error))
-                throw abort;
+                throw new AbortException();
         }
         if( severity==DOMError.SEVERITY_FATAL_ERROR )
-            throw abort;
+            throw new AbortException();
     }
 
     protected final void updateQName (Node node, QName qname){
@@ -2044,5 +2039,4 @@ public class DOMNormalizer implements XMLDocumentHandler {
         return null;
     }
 
-
 }  // DOMNormalizer class
diff --git a/src/com/sun/org/apache/xml/internal/serialize/DOMSerializerImpl.java b/src/com/sun/org/apache/xml/internal/serialize/DOMSerializerImpl.java
index d17cf33..8f14d74 100644
--- a/src/com/sun/org/apache/xml/internal/serialize/DOMSerializerImpl.java
+++ b/src/com/sun/org/apache/xml/internal/serialize/DOMSerializerImpl.java
@@ -33,6 +33,7 @@ import java.net.URLConnection;
 import java.util.StringTokenizer;
 import java.util.Vector;
 
+import com.sun.org.apache.xerces.internal.dom.AbortException;
 import com.sun.org.apache.xerces.internal.dom.CoreDocumentImpl;
 import com.sun.org.apache.xerces.internal.dom.DOMErrorImpl;
 import com.sun.org.apache.xerces.internal.dom.DOMLocatorImpl;
@@ -117,7 +118,6 @@ public class DOMSerializerImpl implements LSSerializer, DOMConfiguration {
     private DOMErrorHandler fErrorHandler = null;
     private final DOMErrorImpl fError = new DOMErrorImpl();
     private final DOMLocatorImpl fLocator = new DOMLocatorImpl();
-    private static final RuntimeException abort = new RuntimeException();
 
     /**
      * Constructs a new LSSerializer.
@@ -539,11 +539,9 @@ public class DOMSerializerImpl implements LSSerializer, DOMConfiguration {
         } catch (LSException lse) {
             // Rethrow LSException.
             throw lse;
+        } catch (AbortException e) {
+            return null;
         } catch (RuntimeException e) {
-            if (e == DOMNormalizer.abort){
-                // stopped at user request
-                return null;
-            }
             throw (LSException) new LSException(LSException.SERIALIZE_ERR, e.toString()).initCause(e);
         } catch (IOException ioe) {
             // REVISIT: A generic IOException doesn't provide enough information
@@ -836,11 +834,9 @@ public class DOMSerializerImpl implements LSSerializer, DOMConfiguration {
         } catch (LSException lse) {
             // Rethrow LSException.
             throw lse;
+        } catch (AbortException e) {
+            return false;
         } catch (RuntimeException e) {
-            if (e == DOMNormalizer.abort){
-                // stopped at user request
-                return false;
-            }
             throw (LSException) DOMUtil.createLSException(LSException.SERIALIZE_ERR, e).fillInStackTrace();
         } catch (Exception e) {
             if (ser.fDOMErrorHandler != null) {
@@ -992,11 +988,9 @@ public class DOMSerializerImpl implements LSSerializer, DOMConfiguration {
         } catch (LSException lse) {
             // Rethrow LSException.
             throw lse;
+        } catch (AbortException e) {
+            return false;
         } catch (RuntimeException e) {
-            if (e == DOMNormalizer.abort){
-                // stopped at user request
-                return false;
-            }
             throw (LSException) DOMUtil.createLSException(LSException.SERIALIZE_ERR, e).fillInStackTrace();
         } catch (Exception e) {
             if (ser.fDOMErrorHandler != null) {