Is there any class that javassist can't process? about javassist

[chibash]

Is TestDog2#transform() invoked when com/CertShim/Dog is loaded?

[akatsuki521]

I don't think so, when com/CertShim/Dog comes, it will simply return null. I add a print command after the return null in the try block. Only the desired two class name can be printed.

Maybe my title isn't appropriate, I didn't mean there is any problem with javassist. I just want to know where did I use this tool incorrectly. Sorry about that.
BTW, I'm using JDK 7.

[chibash]

OK, so it's not a problem of Javassist.

I guess that security-related (or system) classes are loaded by the system loader different from the loader
for other classes like com.CertShim.Dog. Also, a class referred to in a security class is loaded by
the system loader. So, if the system class loader cannot find the Dog class, an error will be thrown.
I suppose the system class loader only searches rt.jar.

[akatsuki521]

Thanks for the reply.
I want to revise my previous comment.
I added a print command before the try. "com/CertShim/Dog" is not loaded at all. That's why the exception happens.

[akatsuki521]

I made some attempts by putting Dog class into system jars. I put it into the rt.jar and jsse.jar with the my path name, same problem still happen. If I put the dog class in the same package with the X509TrustManagerImpl, it will bark() normally. So do you think there might be some other reasons about this problem?
Thanks.

[akatsuki521]

@chibash
I find this link(https://bugs.openjdk.java.net/browse/JDK-4405095) that might bring some insight into this problem. From this sentence "JSSE and JCE need their own jar files due to export/import related issues. So the VM has to be changed to pick up the JSSE and JCE jar files. This is just like that VM had to be changed to pick up the Sun RSA provider." So I guess the class needed by jsse classes are treated specially. Unfortunately, I'm not familiar with JVM. Do you think there is a way to work around this problem?
Thanks.

[akatsuki521]

Problem solved, thank you for directing me to the classloader. The jsse.jar and classes used by jsse.jar is loaded by bootstrap classloader. And bootstrap loader only load specific classes. So self injected class won't be loaded. By using "-Xbootclasspath/a" parameter, I can add classpath to the bootstrap classloader.