Date: Mon, 6 Feb 2012 17:08:42 GMT From: Florian Wilkemeyer <fw@f-ws.de> To: freebsd-gnats-submit@FreeBSD.org Subject: amd64/164828: pthread_create/join memory leak Message-ID: <201202061708.q16H8g8r052060@red.freebsd.org> Resent-Message-ID: <201202061710.q16HA9a9045106@freefall.freebsd.org>
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>Number: 164828
>Category: amd64
>Synopsis: pthread_create/join memory leak
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: freebsd-amd64
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Feb 06 17:10:09 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator: Florian Wilkemeyer
>Release: 9.0-RELEASE
>Organization:
>Environment:
FreeBSD 9test 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
>Description:
I recently noticed that pthread_create/join leaks memory
when you're going to create & destroy masses of threads.
Test code: (compiled with gcc -o test test.c -lphtread)
#include <pthread.h>
void *thrProc(void *arg){
pthread_exit(NULL);
}
int main(){
pthread_t thr;
while(1){
thr = NULL;
pthread_create(&thr, NULL, thrProc, NULL);
pthread_join(thr, NULL);
}
return 0;
}
The same code runs on 8.2 without problems:
FreeBSD wilkemeyer-laptop 8.2-RELEASE-p2 FreeBSD 8.2-RELEASE-p2 #0: Thu Jul 21 20:11:49 CEST 2011 root@wilkemeyer-laptop:/usr/obj/usr/src/sys/WILKEMEYER_LAPTOP amd64
>How-To-Repeat:
#include <pthread.h>
void *thrProc(void *arg){
pthread_exit(NULL);
}
int main(){
pthread_t thr;
while(1){
thr = NULL;
pthread_create(&thr, NULL, thrProc, NULL);
pthread_join(thr, NULL);
}
return 0;
}
// compile with
// gcc -o test test.c -lphtread
//
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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