NetBSD Problem Report #46584
From www@NetBSD.org Mon Jun 11 08:03:35 2012
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Date: Mon, 11 Jun 2012 08:03:34 +0000 (UTC)
From: naruse@airemix.jp
Reply-To: naruse@airemix.jp
To: gnats-bugs@NetBSD.org
Subject: /proc/[pid]/task doesn't work
X-Send-Pr-Version: www-1.0
>Number: 46584
>Category: kern
>Synopsis: /proc/[pid]/task doesn't work
>Confidential: no
>Severity: non-critical
>Priority: medium
>Responsible: kern-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Jun 11 08:05:00 +0000 2012
>Originator: Yui NARUSE
>Release: 6.99.7
>Organization:
>Environment:
NetBSD kelvena.airemix.net 6.99.7 NetBSD 6.99.7 (GENERIC) #2: Thu May 17 14:42:34 JST 2012 naruse@kelvena.airemix.net:/usr/obj/sys/arch/amd64/compile/GENERIC amd64
>Description:
Recently NetBSD-current has /proc/[pid]/task but attached program doesn't work.
It only show main thread, doesn't show sub threads.
It correctly works on at least Ubuntu 10.04 amd64.
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <dirent.h>
void *dummy(void *p) {
sleep(100);
return NULL;
}
int main(void) {
int i;
DIR *dirp;
struct dirent *dp;
pthread_t *thread = malloc(sizeof(pthread_t));
if (pthread_create(thread, NULL, dummy, &i)) {
perror("pthread_create");
abort();
}
dirp = opendir("/proc/self/task");
while (dp = readdir(dirp)) {
printf("%s\n", dp->d_name);
}
return 0;
}
>How-To-Repeat:
% cat proc.c
#include <pthread.h>
#include <stdlib.h>
#include <stdio.h>
#include <dirent.h>
void *dummy(void *p) {
sleep(100);
return NULL;
}
int main(void) {
int i;
DIR *dirp;
struct dirent *dp;
pthread_t *thread = malloc(sizeof(pthread_t));
if (pthread_create(thread, NULL, dummy, &i)) {
perror("pthread_create");
abort();
}
dirp = opendir("/proc/self/task");
while (dp = readdir(dirp)) {
printf("%s\n", dp->d_name);
}
return 0;
}
% cc -pthread proc.c&&./a.out
.
..
22667
>Fix:
(Contact us)
$NetBSD: query-full-pr,v 1.39 2013/11/01 18:47:49 spz Exp $
$NetBSD: gnats_config.sh,v 1.8 2006/05/07 09:23:38 tsutsui Exp $
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