CNI threads and garbage collection on FC4

Fri Aug 26 21:34:00 GMT 2005

> I'm using CNI to convert C++ objects (data only, no methods) into java
> objects and pass them over the network to java programs using
> serialization. It works fine on my older machines with various versions
> of GCC 3.x, but it causes a problem on my FC4 machine which has GCC
> 4.0.1 and libgcj 4.0.1.
>> I create several threads using pthread_create from C++ and I call
> JvAttachCurrentThread(NULL, NULL) in each of them. The problem is when I
> create new java objects libgcj throws an exception and prints
>> Collecting from unknown thread.
> Aborted
>> I am sure that I only create java objects in threads that called
> JvAttachCurrentThread(NULL, NULL) when they started. And this works on
> all my machines except FC4.
>> Does anyone have any ideas? Is it possible to disable garbage collection
> in CNI and delete the java objects manually? I need this code to work on
> all recent distributions for it to be useful.

You cannot create a thread and pass it to java after the fact. The gc 
subsystem doesn't support that, yet. Hans Boehm, its author, intends to 
support this eventually....
Andi..