Hi!
> - mlock all lines on /proc/self/maps
> - show mapping
> - munlock all lines on /proc/self/maps
> - show again
>
> Signed-off-by: CAI Qian <[email protected]>
> ---
> runtest/mm | 1 +
> testcases/kernel/syscalls/mlock/mlock03.c | 106
> +++++++++++++++++++++++++++++
> 2 files changed, 107 insertions(+), 0 deletions(-)
> create mode 100644 testcases/kernel/syscalls/mlock/mlock03.c
>
> diff --git a/runtest/mm b/runtest/mm
> index 16e60d4..09a339d 100644
> --- a/runtest/mm
> +++ b/runtest/mm
> @@ -70,3 +70,4 @@ hugemmap05_3 hugemmap05 -s -m
> cpuset01 cpuset01 -I 3600
>
> mbind01 mbind01
> +mlock01 mlock01 -i 20
Here you are adding mlock01 but the test name below is mlock03.
> diff --git a/testcases/kernel/syscalls/mlock/mlock03.c
> b/testcases/kernel/syscalls/mlock/mlock03.c
> new file mode 100644
> index 0000000..7e66053
> --- /dev/null
> +++ b/testcases/kernel/syscalls/mlock/mlock03.c
> @@ -0,0 +1,106 @@
> +/*
> + * Stack size mapping is decreased through mlock/munlock call.
> + *
> + * - mlock all lines on /proc/self/maps
> + * - show mapping
> + * - munlock all lines on /proc/self/maps
> + * - show again
> + *
> + * Copyright (C) 2010 Red Hat, Inc.
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of version 2 of the GNU General Public
> + * License as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it would be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + *
> + * Further, this software is distributed without any warranty that it
> + * is free of the rightful claim of any third person regarding
> + * infringement or the like. Any license provided herein, whether
> + * implied or otherwise, applies only to this software file. Patent
> + * licenses, if any, provided herein do not apply to combinations of
> + * this program with other software, or any other product whatsoever.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write the Free Software
> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
> + * 02110-1301, USA.
> + */
> +#include <stdio.h>
> +#include <string.h>
> +#include <sys/mman.h>
> +#include "test.h"
> +#include "usctest.h"
> +
> +#define KB 1024
> +
> +char *TCID = "mlock03";
> +int TST_TOTAL = 1;
> +extern int Tst_count;
> +
> +int main(int argc, char *argv[])
> +{
> + int lc;
> + char *msg;
> + long from, to, first = -1, last = -1;
> + char b[KB], pid[BUFSIZ];
> + FILE *fp;
> +
> + msg = parse_opts(argc, argv, NULL, NULL);
> + if (msg != NULL)
> + tst_brkm(TBROK, tst_exit, "OPTION PARSING ERROR - %s",
> + msg);
> + sprintf(pid, "cat /proc/%d/maps", getpid());
I suppose pid was used for opening maps before changing line below to
open("/proc/self/maps", "r") so pid could be removed now.
> + for (lc = 0; TEST_LOOPING(lc); lc++) {
> + fp = fopen("/proc/self/maps", "r");
> + if (fp == NULL)
> + tst_brkm(TBROK|TERRNO, tst_exit, "fopen");
> +
> + while (!feof(fp)) {
> + if (!fgets(b, KB - 1, fp))
> + break;
> + b[strlen(b) - 1] = '\0';
> + sscanf(b, "%lx-%lx", &from, &to);
> +
> + /* Record the initial stack size. */
> + if ((lc == 0) && (strstr(b, "[stack]") != NULL))
> + first = (to - from)/KB;
> +
> + switch (lc & 1) {
> + case 0:
> + if (mlock((const void*)from,
> + (to - from)) == -1)
> + tst_resm(TINFO|TERRNO, "mlock");
> + break;
> + case 1:
> + if (munlock((const void*)from,
> + (to - from)) == -1)
> + tst_resm(TINFO|TERRNO,
> + "munlock");
> + break;
> + default:
> + break;
> + }
> + tst_resm(TINFO, "%s from %lx to %0lx",
> + (lc&1) ? "munlock" : "mlock ",
> + from, to);
> +
> + /* Record the final stack size. */
> + if (strstr(b, "[stack]") != NULL)
> + last = (to - from)/KB;
> + }
> + printf("\n");
> + fclose(fp);
> + }
> + tst_resm(TINFO, "starting stack size is %ld", first);
> + tst_resm(TINFO, "final stack size is %ld", last);
> +
> + if (last < first)
> + tst_resm(TFAIL, "stack size is decreased.");
> + else
> + tst_resm(TPASS, "stack size is not decreased.");
> +
> + tst_exit();
> +}
Perhaps it would be more consistent to do both mlock() and munlock() for
each test iteration.
--
Cyril Hrubis
[email protected]
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