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List: openjdk-distro-pkg-dev
Subject: /hg/icedtea-web: Fix problem in resolving classes
From: omajid () icedtea ! classpath ! org (omajid at icedtea ! classpath ! org)
Date: 2012-06-28 18:54:10
Message-ID: hg.924a83097ed7.1340909650.8643924302249223276 () icedtea ! classpath ! org
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changeset 924a83097ed7 in /hg/icedtea-web
details: http://icedtea.classpath.org/hg/icedtea-web?cmd=changeset;node=924a83097ed7
author: Omair Majid <omajid at redhat.com>
date: Thu Jun 28 14:53:07 2012 -0400
Fix problem in resolving classes
The bug manifests when the following sequence of steps happen:
1. An applet with both a codebase and a jar (archive) is loaded
2. A class Foo is loaded using the codebase classloader
3. The Foo class tries to load a class Bar that is specified in the jar
archive. The Bar class is not found.
The following applet reproduces the problem:
http://javadjvu.foxtrottechnologies.com/cgi-bin/djvuapplet.pl/examples/deer.djvu?zoom=page
The fix addresses the problem by ensuring that the codebase classloader
asks the classloader that knows about the jar archive to resolve
classes too.
diffstat:
ChangeLog | 10 ++
netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java | 16 ++-
tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java | 48 \
+++++++++- 3 files changed, 71 insertions(+), 3 deletions(-)
diffs (132 lines):
diff -r c372fa282f61 -r 924a83097ed7 ChangeLog
--- a/ChangeLog Thu Jun 28 17:48:34 2012 +0200
+++ b/ChangeLog Thu Jun 28 14:53:07 2012 -0400
@@ -1,3 +1,13 @@
+2012-06-28 Omair Majid <omajid at redhat.com>
+
+ * netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java
+ (findClass): Invoke CodeBaseClassLoader.findClass with a flag to avoid
+ infinite recursion.
+ (CodeBaseClassLoader.findClass(String)): Delegate to ...
+ (CodeBaseClassLoader.findClass(String,boolean)): New method.
+ * tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java
+ (testParentClassLoaderIsAskedForClasses): New method.
+
2012-06-28 Jiri Vanek <jvanek at redhat.com>
Correctly backup all log files re-writable by emma during code-coverage
diff -r c372fa282f61 -r 924a83097ed7 \
netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java
--- a/netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java Thu Jun 28 17:48:34 2012 \
+0200
+++ b/netx/net/sourceforge/jnlp/runtime/JNLPClassLoader.java Thu Jun 28 14:53:07 2012 \
-0400 @@ -1577,8 +1577,8 @@
// Try codebase loader
if (codeBaseLoader != null)
- return codeBaseLoader.findClass(name);
-
+ return codeBaseLoader.findClass(name, true);
+
// All else failed. Throw CNFE
throw new ClassNotFoundException(name);
}
@@ -2060,6 +2060,18 @@
@Override
public Class<?> findClass(String name) throws ClassNotFoundException {
+ return findClass(name, false);
+ }
+
+ public Class<?> findClass(String name, boolean recursivelyInvoked) throws \
ClassNotFoundException { +
+ if (!recursivelyInvoked) {
+ try {
+ return parentJNLPClassLoader.findClass(name);
+ } catch (ClassNotFoundException cnfe) {
+ // continue
+ }
+ }
// If we have searched this path before, don't try again
if (Arrays.equals(super.getURLs(), notFoundResources.get(name)))
diff -r c372fa282f61 -r 924a83097ed7 \
tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java
--- a/tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java Thu \
Jun 28 17:48:34 2012 +0200
+++ b/tests/netx/unit/net/sourceforge/jnlp/runtime/CodeBaseClassLoaderTest.java Thu \
Jun 28 14:53:07 2012 -0400 @@ -37,9 +37,11 @@
package net.sourceforge.jnlp.runtime;
+import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
+import java.net.MalformedURLException;
import java.net.URL;
import java.util.Locale;
@@ -55,9 +57,11 @@
import org.junit.Test;
- at Bug(id={"PR895","http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March \
/017626.html","http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March/017667.html"})
public class CodeBaseClassLoaderTest {
+ @Bug(id={"PR895",
+ "http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March/017626.html",
+ "http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March/017667.html"})
@Test
public void testResourceLoadSuccessCaching() throws LaunchException, \
ClassNotFoundException, IOException, ParseException {
final URL JAR_URL = new URL("http://icedtea.classpath.org/netx/about.jar");
@@ -100,6 +104,9 @@
assertTrue(timeOnSecondTry < (timeOnFirstTry / 10));
}
+ @Bug(id={"PR895",
+ "http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March/017626.html",
+ "http://mail.openjdk.java.net/pipermail/distro-pkg-dev/2012-March/017667.html"})
@Test
public void testResourceLoadFailureCaching() throws LaunchException, \
ClassNotFoundException, IOException, ParseException {
final URL JAR_URL = new URL("http://icedtea.classpath.org/netx/about.jar");
@@ -142,4 +149,43 @@
assertTrue(timeOnSecondTry < (timeOnFirstTry / 10));
}
+ @Test
+ public void testParentClassLoaderIsAskedForClasses() throws \
MalformedURLException, LaunchException { + final URL JAR_URL = new \
URL("http://icedtea.classpath.org/netx/about.jar"); + final URL CODEBASE_URL = \
new URL("http://icedtea.classpath.org/netx/"); +
+ JNLPFile dummyJnlpFile = new JNLPFile() {
+ @Override
+ public ResourcesDesc getResources() {
+ return new ResourcesDesc(null, new Locale[0], new String[0], new \
String[0]); + }
+
+ @Override
+ public URL getCodeBase() {
+ return CODEBASE_URL;
+ }
+
+ @Override
+ public SecurityDesc getSecurity() {
+ return new SecurityDesc(null, SecurityDesc.SANDBOX_PERMISSIONS, \
null); + }
+ };
+
+ final boolean[] parentWasInvoked = new boolean[1];
+
+ JNLPClassLoader parent = new JNLPClassLoader(dummyJnlpFile, null) {
+ @Override
+ protected Class<?> findClass(String name) throws ClassNotFoundException \
{ + parentWasInvoked[0] = true;
+ throw new ClassNotFoundException(name);
+ }
+ };
+ CodeBaseClassLoader classLoader = new CodeBaseClassLoader(new URL[] { \
JAR_URL, CODEBASE_URL }, parent); + try {
+ classLoader.findClass("foo");
+ assertFalse("should not happen", true);
+ } catch (ClassNotFoundException cnfe) { /* ignore */ }
+
+ assertTrue(parentWasInvoked[0]);
+ }
}
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