143 lines
2.7 KiB
C
143 lines
2.7 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2015 Giacomo Tesio <giacomo@tesio.it>
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*
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* Jehanne is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 of the License.
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*
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* Jehanne is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Jehanne. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <u.h>
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#include <lib9.h>
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/* verify that rwakeup returns 0 on Rendez that has already been awaken */
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Rendez r;
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QLock l;
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int ready;
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int verbose = 0;
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int killerProc; /* pid, will kill the other processes if starved */
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int
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handletimeout(void *v, char *s)
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{
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/* just not exit, please */
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if(strcmp(s, "timedout") == 0){
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if(verbose)
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print("%d: noted: %s\n", getpid(), s);
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print("FAIL: timedout\n");
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exits("FAIL");
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}
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return 0;
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}
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void
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killKiller(void)
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{
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postnote(PNPROC, killerProc, "interrupt");
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}
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void
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stopAllAfter(int seconds)
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{
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int pid;
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switch((pid = rfork(RFMEM|RFPROC|RFNOWAIT)))
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{
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case 0:
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if(verbose)
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print("killer proc started: pid %d\n", getpid());
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sleep(seconds * 1000);
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postnote(PNGROUP, killerProc, "timedout");
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if(verbose)
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print("killer proc timedout: pid %d\n", getpid());
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exits("FAIL");
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case -1:
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fprint(2, "%r\n");
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exits("rfork fails");
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default:
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killerProc = pid;
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atexit(killKiller);
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}
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}
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void
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main(void)
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{
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int s, w;
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rfork(RFNOTEG);
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if (!atnotify(handletimeout, 1)){
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fprint(2, "%r\n");
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exits("atnotify fails");
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}
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r.l = &l;
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stopAllAfter(30);
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/* one process to sleep */
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switch((s = rfork(RFMEM|RFPROC|RFNOWAIT)))
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{
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case 0:
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ready = 1;
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qlock(&l);
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rsleep(&r);
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qunlock(&l);
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exits(nil);
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break;
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case -1:
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print("rfork: %r\n");
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exits("rfork fails");
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break;
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default:
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while(ready == 0)
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;
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break;
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}
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/* one process to wakeup */
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switch((w = rfork(RFMEM|RFPROC|RFNOWAIT)))
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{
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case 0:
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qlock(&l);
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rwakeup(&r);
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ready = 2;
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qunlock(&l);
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exits(nil);
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break;
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case -1:
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print("rfork: %r\n");
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exits("rfork fails");
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break;
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default:
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while(ready == 1)
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;
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break;
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}
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/* now, we try to wakeup a free Rendez */
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qlock(&l);
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if(rwakeup(&r) == 0){
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qunlock(&l);
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print("PASS\n");
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exits("PASS");
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}
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if((s = open(smprint("/proc/%d/ctl", s), OWRITE)) >= 0){
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write(s, "kill", 5);
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close(s);
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}
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if((w = open(smprint("/proc/%d/ctl", w), OWRITE)) >= 0){
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write(s, "kill", 5);
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close(s);
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}
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print("FAIL");
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exits("FAIL");
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}
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