91 lines
2.1 KiB
C
91 lines
2.1 KiB
C
/*
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* This file is part of Jehanne.
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*
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* Copyright (C) 2016 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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#define MSGTPL "Hello from %d!"
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int verbose = 1;
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int
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failOnReadFault(void *v, char *s)
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{
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if(strncmp(s, "sys: trap: fault read ", 4) == 0){
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if(verbose)
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print("%d: noted: %s\n", getpid(), s);
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print("FAIL: %s\n", s);
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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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main(void)
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{
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int p[2], pid, i;
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char *msg, buf[128];
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if (!atnotify(failOnReadFault, 1)){
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fprint(2, "%r\n");
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exits("atnotify fails");
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}
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pipe(p);
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memset(buf, 0, sizeof buf);
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switch((pid = rfork(RFPROC|RFMEM))){
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case -1:
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fprint(2, "FAIL: rfork: %r\n");
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exits("FAIL");
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break;
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case 0:
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msg = smprint(MSGTPL, getpid());
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i = sprint(buf, "%p", msg);
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if(verbose){
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fprint(2, "address %p, msg %s\n", msg, msg);
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fprint(2, "sending %s\n", buf);
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}
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if(write(p[0], buf, i) < 0){
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fprint(2, "FAIL: write: %r\n");
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exits("FAIL");
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}
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exits("PASS");
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break;
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default:
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buf[0] = '0';
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buf[1] = 'x';
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if((i = read(p[1], buf+2, (sizeof buf) - 2)) <= 0){
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fprint(2, "FAIL: read: %r\n");
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exits("FAIL");
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}
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msg = (char*)atoll(buf);
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if(verbose){
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fprint(2, "received %s\n", buf);
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fprint(2, "address %p\n", msg);
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}
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i = sprint(buf, MSGTPL, pid);
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if(strncmp(msg, buf, i) == 0){
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fprint(2, "PASS\n", msg);
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exits("PASS");
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}
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print("FAIL: shared memory corrupted: read '%s' from child address space instead of '%s'.\n", msg, buf);
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exits("FAIL");
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break;
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}
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}
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