Hi Robert,
It could be that you face the same problem that was reported
by Joern Adamczewski at:
http://root.cern.ch/root/roottalk/roottalk03/2212.html
in response to a mail from Volker Hejny.
gcc2.96 is known to be a compiler to avoid in the real life.
Rene Brun
On Wed, 2 Jul
2003, Robert Feuerbach wrote:
>
> Dear ROOT-team,
>
> We're experimenting with using threads to help with an event
> display, but are having difficulty getting even the standard
> examples ( Mhs3 is one ) to work under RedHat 7.x, and are
> looking for a solution.
>
> An extremely simple example is given below, and works fine on our
> older RedHat 6.2 machines (single and multi-processor). Both the
> 7.x and 6.2 machines use the same version of ROOT 3.05-04 ,
> though separately compiled libraries.
>
> There had been some previous discussions about TThreads under
> Redhat 7.x, with the conclusion that a version of glibc>=2.2.5-37
> (on RH 7.2) was necessary, which our glibc is.
>
> When the simple script crashes, it appears to be hung up in a
> TThread::Printf:
> (excerpts from the stack trace)
> 0x40dd7f05 in <unknown> from /lib/i686/libpthread.so.0
> 0x42029188 in <unknown> from /opt/root-rh7-g++/new/bin/root.exe
> 0x40dd7609 in <unknown> from /lib/i686/libpthread.so.0
> 0x40dd3eec in pthread_cond_wait + 0x118 from /lib/i686/libpthread.so.0
> 0x41495911 in TPosixCondition::Wait(void) + 0x29 from /opt/root-rh7-g++/new/lib/libThread.so
> 0x41498a5c in TThread::XARequest(char const *, int, void **, int *) + 0x114 from /opt/root-rh7-g++/new/lib/libThread.so
> 0x41498920 in TThread::Printf(char const *, long) + 0x34 from /opt/root-rh7-g++/new/lib/libThread.so
> 0x41498566 in TThread::Fun(void *) + 0x7e from /opt/root-rh7-g++/new/lib/libThread.so
>
> Any ideas? Are other people seeing this problem?
>
> Thanks for you help,
> Rob
>
> ----------------
> Configurations for "Broken" Threads:
> Linux 2.4.20-18.7smp #1 SMP Thu May 29 07:49:23 EDT 2003 i686 unknown
> AND
> Linux 2.4.18-10 #1 Wed Aug 7 10:26:48 EDT 2002 i686 unknown
>
> ROOT version 3.05-04
> gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-113)
> glibc-2.2.5-43
> -----------------
>
> Simple Test script (loaded with .L test2.C++):
>
> //-------- test2.C --------------------------------
> #include "TThread.h"
>
> void *th1(void *ptr)
> {
> TThread::Printf("Start of thread 1 %x \n",ptr);
> // sleep for a little while
> gSystem->Sleep(5000);
> TThread::Printf("Thread 1 finished\n");
> return NULL;
> }
>
> void *th2(void *ptr)
> {
> TThread::Printf("Start of thread 2 %x \n",ptr);
> // sleep for a little while
> gSystem->Sleep(2000);
> TThread::Printf("Thread 2 finished\n");
> return NULL;
> }
>
> void test_threads() {
> TThread *t1 = new TThread(th1,0);
> TThread *t2 = new TThread(th2,0);
> t1->Run();
> t2->Run();
> return;
> }
> // END test2.C --------------------------------
>
>
>
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