Date: Fri, 26 Sep 2014 17:00:02 +0200 From: Guillaume Friloux <guillaume@friloux.me> To: freebsd-threads@freebsd.org Subject: Segfault from libthr.so. Message-ID: <20140926150001.GF7885@Jetdail>
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[-- Attachment #1 --]
Hello,
First of all, i am new to the BSD world.
I am here to report a problem when linking an hello world with -lssp and -lpthread.
I am running :
FreeBSD sds 10.0-RELEASE FreeBSD 10.0-RELEASE #0 r260789: Thu Jan 16 22:34:59 UTC 2014 root@snap.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64
root@sds:/tmp # gcc48 main.c -o main
root@sds:/tmp # ./main
Hello World!
root@sds:/tmp # gcc48 main.c -o main -lpthread
root@sds:/tmp # ./main
Hello World!
root@sds:/tmp # gcc48 main.c -o main -lssp
root@sds:/tmp # ./main
Hello World!
root@sds:/tmp # gcc48 main.c -o main -lssp -lpthread
root@sds:/tmp # ./main
Hello World!
root@sds:/tmp # gcc48 main.c -o main -lpthread -lssp
root@sds:/tmp # ./main
Segmentation fault (core dumped)
root@sds:/tmp #
Here is what gdb says :
root@sds:/tmp # gdb main main.core
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "amd64-marcel-freebsd"...(no debugging symbols found)...
Core was generated by `main'.
Program terminated with signal 11, Segmentation fault.
Reading symbols from /lib/libthr.so.3...(no debugging symbols found)...done.
Loaded symbols for /lib/libthr.so.3
Reading symbols from /lib/libssp.so.0...(no debugging symbols found)...done.
Loaded symbols for /lib/libssp.so.0
Reading symbols from /lib/libc.so.7...(no debugging symbols found)...done.
Loaded symbols for /lib/libc.so.7
Reading symbols from /libexec/ld-elf.so.1...(no debugging symbols found)...done.
Loaded symbols for /libexec/ld-elf.so.1
#0 0x000000080082e604 in pthread_testcancel () from /lib/libthr.so.3
[New LWP 100071]
(gdb) bt
#0 0x000000080082e604 in pthread_testcancel () from /lib/libthr.so.3
#1 0x0000000800826706 in open () from /lib/libthr.so.3
#2 0x0000000800a41227 in __gets_chk () from /lib/libssp.so.0
#3 0x0000000800a413d2 in __chk_fail () from /lib/libssp.so.0
#4 0x0000000800a40ace in .init () from /lib/libssp.so.0
#5 0x00007fffffffd120 in ?? ()
#6 0x0000000800604691 in r_debug_state () from /libexec/ld-elf.so.1
#7 0x0000000800603d27 in __tls_get_addr () from /libexec/ld-elf.so.1
#8 0x0000000800602089 in .text () from /libexec/ld-elf.so.1
#9 0x0000000000000000 in ?? ()
Here is the hello world code :
#include <stdio.h>
int main(int argc, char **argv)
{
printf("Hello World!\n");
return 0;
}
Thanks for taking time to read this.
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