Dear All,
I noticed that GroovySunClassLoader and SunClassLoader are broken.
I tried to use a Groovy script in Java and noticed that
GroovySunClassLoader.sunVM was null.
I'm using OpenJDK 8u252 and it has sun.reflect.MagicAccessorImpl, so
GroovySunClassLoader.sunVM should not be null.
In my investigation the constructor argument for GroovySunClassLoader seems to
be wrong:
protected GroovySunClassLoader() throws Throwable {
this(ClassReader.SKIP_CODE); // <- should be ClassReader.SKIP_DEBUG or 0
}
I applied the above fix to Groovy and ran the following test program, but the
test failed.
-----------------------------
package app;
import groovy.lang.GroovyShell;
import org.codehaus.groovy.runtime.callsite.GroovySunClassLoader;
public class Main {
public static void main(String[] args) {
System.out.println("sunVM: " + GroovySunClassLoader.sunVM);
GroovyShell shell = new GroovyShell();
String name = (String) shell.evaluate("new app.Main().getName()");
System.out.println(name);
}
private String getName() {
return "abc";
}
}
-----------------------------
The output of the test program:
sunVM: org.codehaus.groovy.runtime.callsite.GroovySunClassLoader@27bc2616
Exception in thread "main" java.lang.IllegalAccessError: tried to access method
app.Main.getName()Ljava/lang/String; from class app.Main$getName
at app.Main$getName.call(Unknown Source)
at
org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:125)
at
org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:130)
at Script1.run(Script1.groovy:1)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:427)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:461)
at groovy.lang.GroovyShell.evaluate(GroovyShell.java:436)
at app.Main.main(Main.java:11)
IllegalAccessError seems to occur as MagicAccessorImpl is not effective.
This is because SunClassLoader.define() does not define a class for the current
class loader.
Classes are defined in GroovySunClassLoader but they are not used.
I think that GroovySunClassLoader and SunClassLoader should be disabled for a
while.
Regards,
Tomokazu Harada
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