Date: Fri, 11 May 2001 02:20:04 -0700 (PDT) From: Peter Pentchev <roam@orbitel.bg> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/27262: process won't be terminated after CPUTIME exceeded Message-ID: <200105110920.f4B9K4f54827@freefall.freebsd.org>
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The following reply was made to PR kern/27262; it has been noted by GNATS.
From: Peter Pentchev <roam@orbitel.bg>
To: in@amalea.org
Cc: FreeBSD-gnats-submit@freebsd.org
Subject: Re: kern/27262: process won't be terminated after CPUTIME exceeded
Date: Fri, 11 May 2001 12:18:53 +0300
On Fri, May 11, 2001 at 12:00:52PM +0800, in@amalea.org wrote:
>
> >Number: 27262
> >Category: kern
> >Synopsis: process won't be terminated after CPUTIME exceeded
> >Originator: in@amalea.org
> >Release: FreeBSD 5.0-CURRENT i386
> >Organization:
> International Amalea Organization
> >Environment:
> System: FreeBSD dns.amalea.org 5.0-CURRENT FreeBSD 5.0-CURRENT #0: Mon May 7 22:33:41 CST 2001 in@dns.amalea.org:/usr/obj/usr/src/sys/GENERIC i386
>
>
> CPU: Pentium III/Pentium III Xeon/Celeron (733.36-MHz 686-class CPU)
> FreeBSD 5.0-CURRENT i386
>
> >Description:
>
> process which exceeds CPUTIME limit by setrlimit()
> will not receive signal SIGXCPU and terminate.
Confirmed.
The attached program's output on RELENG_4 (correct):
$ time ./foo
before: cur = 7FFFFFFFFFFFFFFF, max = 7FFFFFFFFFFFFFFF
Setting CPU limit to cur 2, max 5..
after: cur = 2, max = 5
Entering loop..
time: command terminated abnormally
2.02 real 2.01 user 0.00 sys
Cputime limit exceeded
$
..and on ref5.FreeBSD.org (-current, after waiting a while and hitting ^C):
$ time ./foo
before: cur = 7FFFFFFFFFFFFFFF, max = 7FFFFFFFFFFFFFFF
Setting CPU limit to cur 2, max 5..
after: cur = 2, max = 5
Entering loop..
^CGot signal 2
User: (3, 799606)
System: (0, 7850)
3.800u 0.007s 0:06.08 62.5% 5+178k 0+0io 0pf+0w
$
Something's definitely wrong with -current's setrlimit()..
G'luck,
Peter
--
If this sentence didn't exist, somebody would have invented it.
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <err.h>
#include <signal.h>
#include <stdio.h>
static volatile int sig, sigflag;
static void getlim(const char *, int);
static void setlim(const char *, int, quad_t, quad_t);
static void handler(int);
static void
getlim(const char *s, int resource) {
struct rlimit rlp;
if (getrlimit(resource, &rlp) < 0)
err(1, "getrlimit(%s)", s);
printf("%s: cur = %llX, max = %llX\n", s, rlp.rlim_cur, rlp.rlim_max);
}
static void
setlim(const char *s, int resource, quad_t lcur, quad_t lmax) {
struct rlimit rlp;
printf("Setting %s limit to cur %llX, max %llX..\n", s, lcur, lmax);
rlp.rlim_cur = (quad_t) lcur;
rlp.rlim_max = (quad_t) lmax;
if (setrlimit(resource, &rlp) < 0)
err(1, "setrlimit(%s)", s);
}
static void
handler(int signum __unused) {
sig = signum;
sigflag = 1;
}
static void
showrusage(void) {
struct rusage ru;
if (getrusage(RUSAGE_SELF, &ru) < 0)
err(1, "getrusage()");
printf("User: (%ld, %ld)\nSystem: (%ld, %ld)\n",
ru.ru_utime.tv_sec, ru.ru_utime.tv_usec,
ru.ru_stime.tv_sec, ru.ru_stime.tv_usec);
}
int
main(void) {
getlim("before", RLIMIT_CPU);
setlim("CPU", RLIMIT_CPU, 2, 5);
getlim("after", RLIMIT_CPU);
printf("Entering loop..\n");
sig = 0;
signal(SIGINT, handler);
while (!sig)
;
printf("Got signal %d\n", sig);
showrusage();
return (0);
}
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