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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-11-10 02:26:09 +0100
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-11-10 02:26:09 +0100
commita9a2380cf01cdae519fdaf8ab021d486c8917e43 (patch)
tree09c2d148b17bf7b6fcdb2d32be7d763db5b25c2a /libpthread/nptl/pthread_setname.c
parentb8fcdddcbb192fc367ff04bbd753b9deb69b09f3 (diff)
nptl: add pthread_getname_np/pthread_setname_np from GNU libc
These functions are used by firefox for example. Tested with running firefox on x86 system.
Diffstat (limited to 'libpthread/nptl/pthread_setname.c')
-rw-r--r--libpthread/nptl/pthread_setname.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/libpthread/nptl/pthread_setname.c b/libpthread/nptl/pthread_setname.c
new file mode 100644
index 000000000..6c5e1d6e4
--- /dev/null
+++ b/libpthread/nptl/pthread_setname.c
@@ -0,0 +1,63 @@
+/* pthread_setname_np -- Set thread name. Linux version
+ Copyright (C) 2010-2016 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 <errno.h>
+#include <fcntl.h>
+#include <pthreadP.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/prctl.h>
+
+#include <not-cancel.h>
+
+
+int
+pthread_setname_np (pthread_t th, const char *name)
+{
+ const struct pthread *pd = (const struct pthread *) th;
+
+ /* Unfortunately the kernel headers do not export the TASK_COMM_LEN
+ macro. So we have to define it here. */
+#define TASK_COMM_LEN 16
+ size_t name_len = strlen (name);
+ if (name_len >= TASK_COMM_LEN)
+ return ERANGE;
+
+ if (pd == THREAD_SELF)
+ return prctl (PR_SET_NAME, name) ? errno : 0;
+
+#define FMT "/proc/self/task/%u/comm"
+ char fname[sizeof (FMT) + 8];
+ sprintf (fname, FMT, (unsigned int) pd->tid);
+
+ int fd = open_not_cancel_2 (fname, O_RDWR);
+ if (fd == -1)
+ return errno;
+
+ int res = 0;
+ ssize_t n = TEMP_FAILURE_RETRY (write_not_cancel (fd, name, name_len));
+ if (n < 0)
+ res = errno;
+ else if (n != name_len)
+ res = EIO;
+
+ close_not_cancel_no_status (fd);
+
+ return res;
+}