RE: printStackTrace() hangs in read()

[Jost Boekemeier <JBoekemeier at inetsoftware dot de>]

> -lpthread  

Thanks, that was helpful!  If I link with the pthread library, then the jni
example also works.  


> It's a bug in Red Hat 8.0's Java installation.

Then I am not the only one who made this mistake.  -- It doesn't seem a good
idea to load pthreads dynamically. :)


Jost

-----Original Message-----
From: Andrew Haley [mailto:aph@redhat.com] 
Sent: Dienstag, 4. Februar 2003 11:49
To: Jost Boekemeier
Cc: 'java@gcc.gnu.org'
Subject: JNI: printStackTrace() hangs in read()

Jost Boekemeier writes:
 > Hi,
 > 
 > this may be a known problem on linux (kernel 2.4.18; RH8; gcc3.2.1, no
 > special options)
 > 
 > I have run a simple java test program which simply calls
 > ex.printStackTrace().

It's a bug in Red Hat 8.0's Java installation.

This is the patch you need:

--- /usr/lib/gcc-lib/i386-redhat-linux/3.2/libgcj.spec~ 2002-09-04
04:03:39.000000000 +0100
+++ /usr/lib/gcc-lib/i386-redhat-linux/3.2/libgcj.spec  2002-12-10
15:59:39.000000000 +0000
@@ -4,6 +4,6 @@
 # to link with libgcj.
 #
 %rename lib liborig
-*lib: -lgcj -lm    -lz   -ldl %(libgcc) %(liborig)
+*lib: -lgcj -lm  -lpthread  -lz   -ldl %(libgcc) %(liborig)
 
 *jc1: -fhash-synchronization -fno-use-divide-subroutine  -fuse-boehm-gc
-fnon-call-exceptions -fkeep-inline-functions

 > On linux, is is possible to fork/exec when threads are being used (there
are
 > two other threads probably belonging to the gc and finalizer)?  How can I
 > determine if a procid is a thread?

>From Linux's point of view, there is really very little difference
between a process and a thread -- they're just processes that share
memory.

Andrew.