[HARMONY-6628] Deadlock in getProxyClass()

• Type: Bug
• Status: Open
• Priority: Blocker
• Resolution: Unresolved
• Affects Version/s: 5.0M14
• Component/s: JDK
• Environment: harmony-5.0-jdk-946978/; harmony-6.0-jdk-946981/; Linux-32; Eclipse 3.5
• Assignee: Unassigned
• Reporter: Werner Froidevaux
• Created: 19/Aug/10 14:39
• Updated: 26/Aug/10 10:03

Description

In certain situations the method java.lang.reflect.Proxy.getProxyClass() produces a deadlock. This seems always to be the case when getProxyClass() is called recursively by defineClassImpl().

public static Class<?> getProxyClass(
ClassLoader loader,
Class<?>[] interfaces
) throws IllegalArgumentException {
...
synchronized (loaderCache)

{ ... newClass = defineClassImpl(loader, ...); ... }

}

When the native method recursively invokes getClassImpl() (via newProxyInstance()) the VM is locked at synchronized (loaderCache). Because I only have one thread (Main) a deadlock must never occur.