Date: Thu, 23 Aug 2001 13:49:29 +0200 (CEST) From: Jakub Kruszona-Zawadzki <acid@gem.pl> To: FreeBSD-gnats-submit@freebsd.org Subject: misc/29987: error in libc (simultanous call to malloc or free and printf causes Segmentation Fault) Message-ID: <200108231149.f7NBnTu98952@unix-server.local.gem.pl>
next in thread | raw e-mail | index | archive | help
>Number: 29987
>Category: misc
>Synopsis: error in libc (simultanous call to malloc or free and printf causes Segmentation Fault)
>Confidential: no
>Severity: serious
>Priority: high
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Thu Aug 23 04:50:00 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator: Jakub Kruszona-Zawadzki
>Release: FreeBSD 4.4-PRERELEASE i386
>Organization:
Global eMarketing S.A.
>Environment:
System: FreeBSD unix-server.local.gem.pl 4.4-PRERELEASE FreeBSD 4.4-PRERELEASE #0: Wed Aug 8 11:23:46 CEST 2001 acid@unix-server.local.gem.pl:/usr/obj/usr/src/sys/GEMIUS i386
Machine: Celeron 600
same bug exists on different freebsd versions. We tested FreeBSD 4.1 and FreeBSD 4.3. On both problem exists
(We tested it on Linux too - there is no such problem)
>Description:
It looks like libc has problems with simultanous calls to some functions
>How-To-Repeat:
Just compile, and run this code:
/-------------------------------------------------/
#include <signal.h>
#include <stdio.h>
void salarm(int sn) {
static int s=1;
alarm(1);
fprintf(stderr,"Test %09d, %lf\n",s,1/((double)s));
s++;
}
int main() {
char *a;
int i;
signal(SIGALRM,salarm);
alarm(1);
for (i=0 ; i<1000000 ; i++) {
a=(char *)malloc(1000000);
if (a==NULL) printf("NULL !!!\n");
free(a);
}
return 1;
}
/-------------------------------------------------/
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-bugs" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200108231149.f7NBnTu98952>