The program is here.
msgrcv08.c
-----------
/*
* Copyright (c) 2015 Author: Gabriellla Schmidt <g...@bruker.de>
* Modify: Li Wang <liw...@redhat.com>
*
* 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.
*
* 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.
*/
/*
* Description:
*
* A regression test for:
* commit e7ca2552369c1dfe0216c626baf82c3d83ec36bb
* Author: Mateusz Guzik <mgu...@redhat.com>
* Date: Mon Jan 27 17:07:11 2014 -0800
*
* ipc: fix compat msgrcv with negative msgtyp
*
* Reproduce:
*
* 32-bit application using the msgrcv() system call
* gives the error message:
*
* msgrcv: No message of desired type
*
* If this progarm is compiled as 64-bit application it doesn't works.
*/
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include "test.h"
const char *TCID = "msgrcv08";
const int TST_TOTAL = 1;
struct msgbuf
{
long mtype; /* message type, must be > 0 */
char mtext[16]; /* message data */
};
static void setup(void)
{
tst_require_root(NULL);
TEST_PAUSE;
}
static void cleanup(void)
{
}
static int msr(int msqid)
{
struct msgbuf msbs;
struct msgbuf msbr;
ssize_t sret;
long mtype = 121;
memset(&msbs, 0, sizeof(msbs));
msbs.mtype = mtype;
if (msgsnd(msqid, &msbs, sizeof(msbs.mtext), IPC_NOWAIT))
tst_brkm(TBROK, NULL, "msgsnd error");
sret = msgrcv(msqid, &msbr, sizeof(msbr.mtext), -mtype, IPC_NOWAIT |
MSG_NOERROR);
if (sret < 0) {
tst_resm(TFAIL, "Bug: No message of desired type.");
return -1;
}
if (msbr.mtype != mtype)
tst_brkm(TBROK, NULL, "found mtype %ld, expected %ld\n",
msbr.mtype, mtype);
if ((size_t)sret != sizeof(msbs.mtext))
tst_brkm(TBROK, NULL, "received %lu, expected %lu\n",
(unsigned long)sret, (unsigned
long)sizeof(msbs.mtext));
return 0;
}
static void msgrcv_test(void)
{
int ret;
int msqid = msgget(IPC_PRIVATE, IPC_CREAT | IPC_EXCL | 0666);
if (msqid < 0)
tst_brkm(TBROK, NULL, "msgget error");
ret = msr(msqid);
if (msgctl(msqid, IPC_RMID, 0))
tst_brkm(TBROK, NULL, "msgctl error");
if (!ret)
tst_resm(TPASS, "Hi, no regression found!");
}
int main(int argc, char *argv[])
{
int lc;
tst_parse_opts(argc, argv, NULL, NULL);
setup();
for (lc = 0; TEST_LOOPING(lc); lc++)
msgrcv_test();
cleanup();
tst_exit();
}
--
Regards,
Li Wang
Email: liw...@redhat.com
----- Original Message -----
> Hi all,
>
> I am going to add a new testcase:
> ltp/testcases/kernel/syscalls/ipc/msgrcv/msgrcv08.c
> for regression test.
>
> But the key point is that this program 'msgrcv08.c' should be compiled into
> 32-bit,
> if it is compiled as 64-bit application it doesn't work.
>
>
> So, I try to add one line in the .../ipc/msgrcv/Makefile:
>
> msgrcv08: CFLAGS+=-m32
>
> and I get some compile errors like:
> -----
> # make
> make -C ../lib -f
> "/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/msgrcv/../lib/Makefile"
> all
> make[1]: Entering directory
> `/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/lib'
> make[1]: Nothing to be done for `all'.
> make[1]: Leaving directory
> `/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/lib'
> gcc -g -O2 -g -O2 -fno-strict-aliasing -pipe -Wall -W -g -O2
> -Wold-style-definition -m32 -D_FORTIFY_SOURCE=2
> -I/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/include
> -I/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/msgrcv/../lib
> -I../../../../../include -I../../../../../include
> -L/mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/msgrcv/../lib
> -L../../../../../lib msgrcv08.c -lltp -lipc -o msgrcv08
> /usr/bin/ld: skipping incompatible ../../../../../lib/libltp.a when searching
> for -lltp
> /usr/bin/ld: cannot find -lltp
> /usr/bin/ld: skipping incompatible
> /mnt/tests/kernel/distribution/ltp/generic/ltp-full-20150420/testcases/kernel/syscalls/ipc/msgrcv/../lib/libipc.a
> when searching for -lipc
> /usr/bin/ld: cannot find -lipc
> collect2: error: ld returned 1 exit status
> make: *** [msgrcv08] Error 1
> -----
>
> these because the libltp.a is 64-bit.
>
>
> Then, I came up with a idea that I don't include the ltp-lib file in
> 'msgrcv08.c',
> and just add two lines in the .../ipc/msgrcv/Makefile:
>
> msgrcv08:
> gcc -g -O2 -Wall -m32 msgrcv08.c -o msgrcv08
>
> It works for me, but I know it's not appropriate for LTP management.
>
> What should I do? or, Is there any good way to solve this problem?
>
> Thanks~
>
> --
> Regards,
> Li Wang
> Email: liw...@redhat.com
>
>
>
> ------------------------------------------------------------------------------
> _______________________________________________
> Ltp-list mailing list
> Ltp-list@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/ltp-list
>
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