1#!/bin/sh 2 3# 4# Copyright (c) 2025 Peter Holm <pho@FreeBSD.org> 5# 6# SPDX-License-Identifier: BSD-2-Clause 7# 8 9# Seen: 10# UID PID PPID C PRI NI VSZ RSS MWCHAN STAT TT TIME COMMAND 11# 0 3730 3668 11 20 0 13596 2904 exithold DE+ 0 1:59.68 ./kcmp 12 13# Fixed by: 5b3e5c6ce3e5 14 15. ../default.cfg 16 17set -u 18prog=$(basename "$0" .sh) 19cat > /tmp/$prog.c <<EOF 20#include <sys/types.h> 21 22#include <err.h> 23#include <fcntl.h> 24#include <pthread.h> 25#include <signal.h> 26#include <stdlib.h> 27#include <time.h> 28#include <unistd.h> 29 30static void * 31t1(void *data __unused) 32{ 33 for (;;) 34 pause(); 35 36 return (NULL); 37} 38 39int 40main(void) 41{ 42 pid_t p1, p2; 43 pthread_t tid[2]; 44 time_t start; 45 uintptr_t idx1, idx2; 46 int r; 47 48 if ((r = pthread_create(&tid[0], NULL, t1, NULL)) != 0) 49 errc(1, r, "pthread_create"); 50 if ((r = pthread_create(&tid[1], NULL, t1, NULL)) != 0) 51 errc(1, r, "pthread_create"); 52 53 start = time(NULL); 54 while (time(NULL) - start < 60) { 55 idx1 = idx2 = 0; 56 p1 = arc4random() % 1000000; 57 p2 = arc4random() % 1000000; 58 kcmp(p1, p2, KCMP_VM, idx1, idx2); 59 } 60} 61EOF 62mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c -lpthread || exit 1 63 64/tmp/$prog 65 66rm /tmp/$prog.c /tmp/$prog 67exit 0 68