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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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 -l=
pthread.
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=20
root@sds:/tmp # ./main=20
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=20
root@sds:/tmp # ./main
Segmentation fault (core dumped)
root@sds:/tmp # =20
Here is what gdb says :
root@sds:/tmp # gdb main main.core=20
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 condition=
s.
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 f=
ound)...
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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