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Bug report for gmp_printf with a string %s
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From: |
Eric D. Russell |
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Subject: |
Bug report for gmp_printf with a string %s |
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Date: |
Fri, 13 Dec 2002 16:19:52 -0700 |
Greetings -
I've pretty much convinced myself I'm seeing a bug in gmp_printf and it's
not my code - unless I'm doing somwthing I'm not supposed to do.
Of course it could be the compiler...
The problem is that if there is a string variable near mpz_t variables in
printf's it seg faults depending on where the %s is.
This is just an annoying error, since I know about it I just don't do it.
The test program below should rerpduce the error unless it's my system.
### GMP version: (unpatched)
grep VERSION *.h
config.h:#define VERSION "4.1"
gmp.h:#if __SCO_VERSION__ > 400000000 && __STDC__ != 1 \
gmp.h:#define __GNU_MP_VERSION 4
gmp.h:#define __GNU_MP_VERSION_MINOR 1
gmp.h:#define __GNU_MP_VERSION_PATCHLEVEL 0
### OS: Red Hat Linux 7.3
uname -a
Linux sadl10755 2.4.18-3 #1 Thu Apr 18 07:37:53 EDT 2002 i686 unknown
### congif.guess:
pentium3-pc-linux-gnu
### configfsf.guess:
i686-pc-linux-gnu
### C Version:
cc -v
Reading specs from /usr/lib/gint
cc-lib/i386-redhat-linux/2.96/specs
gcc version 2.96 20000731 (Red Hat Linux 7.3 2.96-110)
### ./configure was it, then make
####################### Test Program
################################################################################
int
main( int argc, char* argv[] )
{
// this is the data to sscanf and printf.
char* line = "1 2 3 ross 4 5 145507181280 145507181281 145507181282
145507181283 145507181284 145507181285
145507181286 145507181287 9 8 7 6 145507181289";
int m, su, sss, xbar, port;
int a, b, c, d;
char host[256];
mpz_t uptime, good, bad, timeouts, illegal_symbols, missed_beats,
bad_routes, dead_routes, transmit_timeouts;
mpz_init( uptime );
mpz_init( timeouts);
mpz_init( good );
mpz_init( bad );
mpz_init( illegal_symbols );
mpz_init( missed_beats );
mpz_init( bad_routes );
mpz_init( dead_routes );
mpz_init( transmit_timeouts );
// first parse the data in line.
gmp_sscanf( line, "%d %d %d %s %d %d %Zd %Zd %Zd %Zd %Zd %Zd %Zd %Zd %d %d
%d %d %Zd",
&m, &su, &sss, host, &xbar, &port,
uptime, good, bad, timeouts, illegal_symbols, missed_beats,
bad_routes, dead_routes,
&a, &b, &c, &d,
transmit_timeouts );
// A variety of printfs to see if everything got read in correctly, and it
looks ok.
gmp_printf("uptime=%Zd\n", uptime );
gmp_printf("good=%Zd\n", good );
gmp_printf("timeouts=%Zd\n\n", timeouts );
gmp_printf("m=%d su=%d sss=%d host=%s xbar=%d port=%d host=%s\n\n",
m, su, sss, host, xbar, port, host );
gmp_printf("uptime=%Zd good=%Zd bad=%Zd timeouts=%Zd illegal_symbols=%Zd
missed_beats=%Zd bad_routes=%Zd
dead_routes=%Zd transmit_timeouts=%Zd\n\n",
uptime, good, bad, timeouts, illegal_symbols, missed_beats,
bad_routes, dead_routes, transmit_timeouts );
gmp_printf("a=%d b=%d c=%d d=%d\n\n", a, b, c, d );
gmp_printf(" m=%d uptime=%Zd a=%d\n\n",
m, uptime, a );
gmp_printf("host=%s. Length=%d\n\n", host, strlen(host) );
// !!!!!!! Now we come to the problem.
// The only difference between the following commands is where "host" is.
// The first works, the 2nd gets a Segmentation Fault.
// !!!
gmp_printf(" host=%s m=%d su=%d sss=%d xbar=%d port=%d uptime=%Zd good=%Zd
bad=%Zd timeouts=%Zd illegal_symbols=%Zd
missed_beats=%Zd bad_routes=%Zd dead_routes=%Zd transmit_timeouts=%Zd a=%d
b=%d c=%d d=%d \n\n",
host, m, su, sss, xbar, port, uptime, good, bad, timeouts,
illegal_symbols, missed_beats, bad_routes,
dead_routes, transmit_timeouts, a, b, c, d );
gmp_printf(" m=%d su=%d sss=%d xbar=%d port=%d host=%s uptime=%Zd good=%Zd
bad=%Zd timeouts=%Zd illegal_symbols=%Zd
missed_beats=%Zd bad_routes=%Zd dead_routes=%Zd transmit_timeouts=%Zd a=%d
b=%d c=%d d=%d \n\n",
m, su, sss, xbar, port, host, uptime, good, bad, timeouts,
illegal_symbols, missed_beats, bad_routes,
dead_routes, transmit_timeouts, a, b, c, d );
}
####################### Execution and back trace:
###################################################################
uptime=145507181280
good=145507181281
timeouts=145507181283
m=1 su=2 sss=3 host=ross xbar=4 port=5 host=ross
uptime=145507181280 good=145507181281 bad=145507181282 timeouts=145507181283
illegal_symbols=145507181284
missed_beats=145507181285 bad_routes=145507181286 dead_routes=145507181287
transmit_timeouts=145507181289
a=9 b=8 c=7 d=6
m=1 uptime=145507181280 a=9
host=ross. Length=4
host=ross m=1 su=2 sss=3 xbar=4 port=5 uptime=145507181280 good=145507181281
bad=145507181282 timeouts=145507181283
illegal_symbols=145507181284 missed_beats=145507181285 bad_routes=145507181286
dead_routes=145507181287
transmit_timeouts=145507181289 a=9 b=8 c=7 d=6
Program received signal SIGSEGV, Segmentation fault.
0x40055c7b in __gmpz_get_str () from /usr/lib/libgmp.so.3
(gdb) backtrace
#0 0x40055c7b in __gmpz_get_str () from /usr/lib/libgmp.so.3
#1 0x400689a6 in __gmp_doprnt () from /usr/lib/libgmp.so.3
#2 0x40069ae3 in __gmp_printf () from /usr/lib/libgmp.so.3
#3 0x08048f7d in main (argc=1, argv=0xbffff754) at test.c:74
#4 0x42017499 in __libc_start_main () from /lib/i686/libc.so.6
###################################################################################################################################################
--
==========================================================================
Eric D. Russell Phone: 505-844-3679
Scalable Computing Systems Department (9223) FAX: 505-845-7442
Sandia National Labs, Mail Stop 1110 Email: address@hidden
Albuquerque, NM 87185-1110 http://www.cs.sandia.gov/cplant
==========================================================================
--
==========================================================================
Eric D. Russell Phone: 505-844-3679
Scalable Computing Systems Department (9223) FAX: 505-845-7442
Sandia National Labs, Mail Stop 1110 Email: address@hidden
Albuquerque, NM 87185-1110 http://www.cs.sandia.gov/cplant
==========================================================================
- Bug report for gmp_printf with a string %s,
Eric D. Russell <=