Date: Thu, 22 Mar 2007 06:08:04 GMT From: "Martin M. Mladenov"<fm@mtweb.org> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/110656: 32 bit threaded applications crash on amd64 SMP kernel. Message-ID: <200703220608.l2M684JS076860@www.freebsd.org> Resent-Message-ID: <200703220620.l2M6K4oS048320@freefall.freebsd.org>
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>Number: 110656
>Category: amd64
>Synopsis: 32 bit threaded applications crash on amd64 SMP kernel.
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-amd64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Mar 22 06:20:04 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator: Martin M. Mladenov
>Release: FreeBSD 6.2-RELEASE-p3 amd64
>Organization:
>Environment:
System: FreeBSD c8 6.2-RELEASE-p3 FreeBSD 6.2-RELEASE-p3 #2: Wed Mar 21 06:31:50 MST 2007 root@c8:/usr/obj/usr/src/sys/SM6015TTV amd64
>Description:
32 bit applications using the posix threads library crash when calling pthread_create on an SMP amd64 kernel. This happens
with existing binaries, built natively on a x86 machine, as well as binaries built with cc -m32 on the amd64 system.
A backtrace for the example in the next section yields:
Core was generated by `pthread-crash'.
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 0x2809f1c808053000 (runnable)]
Cannot get thread info: generic error
(gdb) bt
#0 0x0804d100 in ?? ()
This has been reproduced on two machines with completely different hardware.
>How-To-Repeat:
The problem can be reproduced by the following code (pthread_crash.c):
#include <stdio.h>
#include <pthread.h>
void *thread(void *data) {
puts("Thread.");
return NULL;
}
int main() {
pthread_t pth;
void *pv;
pthread_create(&pth,NULL,thread,NULL);
pthread_join(pth,&pv);
return 0;
}
The code is compiled with:
cc -m32 -B/usr/lib32 -pthread -o pthread-crash pthread-crash.c
This code runs fine when compiled to 64 bit.
>Fix:
None known.
>Release-Note:
>Audit-Trail:
>Unformatted:
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