mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 08:46:49 +07:00
61d47c4e71
There are plans to change how /proc/self result is calculated, for that a test is necessary. Use direct system call because of this whole getpid caching story. Link: http://lkml.kernel.org/r/20180627195103.GB18113@avx2 Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Shuah Khan <shuahkh@osg.samsung.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
|
|
* Copyright © 2018 Alexey Dobriyan <adobriyan@gmail.com>
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
// Test that /proc/self gives correct TGID.
|
|
#undef NDEBUG
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
#include "proc.h"
|
|
|
|
int main(void)
|
|
{
|
|
char buf1[64], buf2[64];
|
|
pid_t pid;
|
|
ssize_t rv;
|
|
|
|
pid = sys_getpid();
|
|
snprintf(buf1, sizeof(buf1), "%u", pid);
|
|
|
|
rv = readlink("/proc/self", buf2, sizeof(buf2));
|
|
assert(rv == strlen(buf1));
|
|
buf2[rv] = '\0';
|
|
assert(streq(buf1, buf2));
|
|
|
|
return 0;
|
|
}
|