mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 07:20:11 +00:00
80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/* Smoke test for the gettid system call.
|
|
Copyright (C) 2019-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <support/check.h>
|
|
#include <support/namespace.h>
|
|
#include <support/xthread.h>
|
|
#include <support/xunistd.h>
|
|
|
|
/* TID of the initial (main) thread. */
|
|
static pid_t initial_tid;
|
|
|
|
/* Check that PID and TID are the same in a subprocess. */
|
|
static void
|
|
subprocess (void *closure)
|
|
{
|
|
TEST_COMPARE (getpid (), gettid ());
|
|
TEST_VERIFY (gettid () != initial_tid);
|
|
}
|
|
|
|
/* Check that the TID changes in a new thread. */
|
|
static void *
|
|
threadfunc (void *closure)
|
|
{
|
|
TEST_VERIFY (getpid () != gettid ());
|
|
TEST_VERIFY (gettid () != initial_tid);
|
|
return NULL;
|
|
}
|
|
|
|
/* Check for interactions with vfork. */
|
|
static void
|
|
test_vfork (void)
|
|
{
|
|
pid_t proc = vfork ();
|
|
if (proc == 0)
|
|
{
|
|
if (getpid () != gettid ())
|
|
_exit (1);
|
|
if (gettid () == initial_tid)
|
|
_exit (2);
|
|
_exit (0);
|
|
}
|
|
int status;
|
|
xwaitpid (proc, &status, 0);
|
|
TEST_COMPARE (status, 0);
|
|
}
|
|
|
|
static int
|
|
do_test (void)
|
|
{
|
|
initial_tid = gettid ();
|
|
|
|
/* The main thread has the same TID as the PID. */
|
|
TEST_COMPARE (getpid (), gettid ());
|
|
|
|
test_vfork ();
|
|
|
|
support_isolate_in_subprocess (subprocess, NULL);
|
|
|
|
xpthread_join (xpthread_create (NULL, threadfunc, NULL));
|
|
|
|
return 0;
|
|
}
|
|
|
|
#include <support/test-driver.c>
|