--- /dev/null
+/* Test pthread_setname_np and pthread_getname_np.
+ Copyright (C) 2013 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; see the file COPYING.LIB. If
+ not, see <http://www.gnu.org/licenses/>. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <pthread.h>
+#include <string.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+/* New name of process. */
+#define NEW_NAME "setname"
+
+/* Name of process which is one byte too big
+ e.g. 17 bytes including null-terminator */
+#define BIG_NAME "....V....X....XV"
+
+/* Longest name of a process
+ e.g. 16 bytes including null-terminator. */
+#define LONGEST_NAME "....V....X....X"
+
+/* One less than longest name with unique
+ characters to detect modification. */
+#define CANARY_NAME "abcdefghijklmn"
+
+/* On Linux the maximum length of the name of a task *including* the null
+ terminator. */
+#define TASK_COMM_LEN 16
+
+long
+gettid (void)
+{
+ return syscall(__NR_gettid);
+}
+
+/* On Linux we can read this task's name from /proc. */
+int
+get_self_comm (long tid, char *buf, size_t len)
+{
+ int res = 0;
+#define FMT "/proc/self/task/%lu/comm"
+ char fname[sizeof (FMT) + 8];
+ sprintf (fname, FMT, (unsigned long) tid);
+
+ int fd = open (fname, O_RDONLY);
+ if (fd == -1)
+ return errno;
+
+ ssize_t n = read (fd, (void *) buf, len);
+ if (n < 0)
+ res = errno;
+ else
+ {
+ if (buf[n - 1] == '\n')
+ buf[n - 1] = '\0';
+ else if (n == len)
+ res = ERANGE;
+ else
+ buf[n] = '\0';
+ }
+
+ close (fd);
+ return res;
+}
+
+int
+do_test (int argc, char **argv)
+{
+ pthread_t self;
+ int res;
+ int ret = 0;
+ char name[TASK_COMM_LEN];
+ char name_check[TASK_COMM_LEN];
+
+ memset (name, '\0', TASK_COMM_LEN);
+ memset (name_check, '\0', TASK_COMM_LEN);
+
+ /* Test 1: Get the name of the task via pthread_getname_np and /proc
+ and verify that they both match. */
+ self = pthread_self ();
+ res = pthread_getname_np (self, name, TASK_COMM_LEN);
+
+ if (res == 0)
+ {
+ res = get_self_comm (gettid (), name_check, TASK_COMM_LEN);
+ if (res == 0)
+ {
+ if (strncmp (name, name_check, strlen (BIG_NAME)) == 0)
+ printf ("PASS: Test 1 - pthread_getname_np and /proc agree.\n");
+ else
+ {
+ printf ("FAIL: Test 1 - pthread_getname_np and /proc differ"
+ " i.e. %s != %s\n", name, name_check);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 1 - unable read task name via proc.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 1 - pthread_getname_np failed with error %d\n", res);
+ ret++;
+ }
+
+ /* Test 2: Test setting the name and then independently verify it
+ was set. */
+ res = pthread_setname_np (self, NEW_NAME);
+
+ if (res == 0)
+ {
+ res = get_self_comm (gettid (), name_check, TASK_COMM_LEN);
+ if (res == 0)
+ {
+ if (strncmp (NEW_NAME, name_check, strlen (BIG_NAME)) == 0)
+ printf ("PASS: Test 2 - Value used in pthread_setname_np and"
+ " /proc agree.\n");
+ else
+ {
+ printf ("FAIL: Test 2 - Value used in pthread_setname_np"
+ " and /proc differ i.e. %s != %s\n",
+ NEW_NAME, name_check);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 2 - unable to read task name via proc.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 2 - pthread_setname_np failed with error %d\n", res);
+ ret++;
+ }
+
+ /* Test 3: Test setting a name that is one-byte too big. */
+ res = pthread_getname_np (self, name, TASK_COMM_LEN);
+
+ if (res == 0)
+ {
+ res = pthread_setname_np (self, BIG_NAME);
+ if (res != 0)
+ {
+ if (res == ERANGE)
+ {
+ printf ("PASS: Test 3 - pthread_setname_np returned ERANGE"
+ " for a process name that was too long.\n");
+
+ /* Verify the old name didn't change. */
+ res = get_self_comm (gettid (), name_check, TASK_COMM_LEN);
+ if (res == 0)
+ {
+ if (strncmp (name, name_check, strlen (BIG_NAME)) == 0)
+ printf ("PASS: Test 3 - Original name unchanged after"
+ " pthread_setname_np returned ERANGE.\n");
+ else
+ {
+ printf ("FAIL: Test 3 - Original name changed after"
+ " pthread_setname_np returned ERANGE"
+ " i.e. %s != %s\n",
+ name, name_check);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 3 - unable to read task name.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 3 - Wrong error returned"
+ " i.e. ERANGE != %d\n", res);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 3 - Too-long name accepted by"
+ " pthread_setname_np.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 3 - Unable to get original name.\n");
+ ret++;
+ }
+
+ /* Test 4: Verify that setting the longest name works. */
+ res = pthread_setname_np (self, LONGEST_NAME);
+
+ if (res == 0)
+ {
+ res = get_self_comm (gettid (), name_check, TASK_COMM_LEN);
+ if (res == 0)
+ {
+ if (strncmp (LONGEST_NAME, name_check, strlen (BIG_NAME)) == 0)
+ printf ("PASS: Test 4 - Longest name set via pthread_setname_np"
+ " agrees with /proc.\n");
+ else
+ {
+ printf ("FAIL: Test 4 - Value used in pthread_setname_np and /proc"
+ " differ i.e. %s != %s\n", LONGEST_NAME, name_check);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 4 - unable to read task name via proc.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 4 - pthread_setname_np failed with error %d\n", res);
+ ret++;
+ }
+
+ /* Test 5: Verify that getting a long name into a small buffer fails. */
+ strncpy (name, CANARY_NAME, strlen (CANARY_NAME) + 1);
+
+ /* Claim the buffer length is strlen (LONGEST_NAME). This is one character
+ too small to hold LONGEST_NAME *and* the null terminator. We should get
+ back ERANGE and name should be unmodified. */
+ res = pthread_getname_np (self, name, strlen (LONGEST_NAME));
+
+ if (res != 0)
+ {
+ if (res == ERANGE)
+ {
+ if (strncmp (CANARY_NAME, name, strlen (BIG_NAME)) == 0)
+ {
+ printf ("PASS: Test 5 - ERANGE and buffer unmodified.\n");
+ }
+ else
+ {
+ printf ("FAIL: Test 5 - Original buffer modified.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 5 - Did not return ERANGE for small buffer.\n");
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 5 - Returned name longer than buffer.\n");
+ ret++;
+ }
+
+ /* Test 6: Lastly make sure we can read back the longest name. */
+ res = pthread_getname_np (self, name, strlen (LONGEST_NAME) + 1);
+
+ if (res == 0)
+ {
+ if (strncmp (LONGEST_NAME, name, strlen (BIG_NAME)) == 0)
+ {
+ printf ("PASS: Test 6 - Read back longest name correctly.\n");
+ }
+ else
+ {
+ printf ("FAIL: Test 6 - Read \"%s\" instead of longest name.\n",
+ name);
+ ret++;
+ }
+ }
+ else
+ {
+ printf ("FAIL: Test 6 - pthread_getname_np failed with error %d\n", res);
+ ret++;
+ }
+
+ return ret;
+}
+
+#include <test-skeleton.c>
git.samba.org / jlayton / glibc.git / commitdiff