Date: Tue, 14 Apr 2009 20:54:45 GMT From: Stephen Sanders <ssanders@opnet.com> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/133735: Multi-threaded 32 bit cores can't be used on 64 bit systems Message-ID: <200904142054.n3EKsjXN065121@www.freebsd.org> Resent-Message-ID: <200904142100.n3EL04oI068392@freefall.freebsd.org>
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>Number: 133735
>Category: misc
>Synopsis: Multi-threaded 32 bit cores can't be used on 64 bit systems
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Apr 14 21:00:04 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Stephen Sanders
>Release: 6.3 - 64 Bit
>Organization:
OPNET
>Environment:
FreeBSD alt-4100-1.lab.opnet.com 6.3-RELEASE FreeBSD 6.3-RELEASE #0: Tue Mar 31 14:11:07 PDT 2009 pmai@focus7.networkphysics.com:/u1/builds/ping/NP/FreeBSD/package/NPbabkernel/bld-tmp/sys/amd64/compile/NPBAB amd64
>Description:
The following program will produce a core file.
Running the program on a FreeBSD 6.3/64 bit system will produce a core file. Attempts to use gdb on the core will fail on the following error:
Core was generated by `threadcore'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /usr/lib32/libpthread.so.2...(no debugging symbols found)...done.
Loaded symbols for /usr/lib32/libpthread.so.2
Reading symbols from /usr/lib32/libc.so.6...(no debugging symbols found)...done.
Loaded symbols for /usr/lib32/libc.so.6
Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols found)...done.
Loaded symbols for /libexec/ld-elf.so.1
#0 0x0804d100 in ?? ()
[New Thread 0x805301408053200 (runnable)]
[New Thread 0x280a05a808053000 (runnable)]
Cannot get thread info: generic error
(gdb)
--------------------------- The Program ------------------
#include <sys/types.h>
#include <signal.h>
#include <pthread.h>
#include <unistd.h>
#include <stdio.h>
#include <err.h>
void *thr(void *a)
{
int *ip = (int *)a;
printf("started thread %d\n", *ip);
pause();
return 0;
}
int main(int argc, char **argv)
{
const int THREADCOUNT =4;
int i;
pthread_t threads[THREADCOUNT];
for (i =0; i < THREADCOUNT; i++)
if (pthread_create(&threads[i], 0, thr, (void *)&i) != 0)
errx(-1, "cannot create thread");
sleep(1);
kill(0, SIGBUS);
return 0;
}
>How-To-Repeat:
Compile the program in the description section on a FreeBSD 6.3/32 bit system. Run it on a 6.3/64 bit system and attempt to look at the core file ('info threads' for example)
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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