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59 lines
1.9 KiB
Diff
59 lines
1.9 KiB
Diff
From 8fb28b0b3e7a5e958fb844722a4b2ef9bc244af1 Mon Sep 17 00:00:00 2001
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From: Felix Janda <felix.janda@posteo.de>
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Date: Fri, 16 Sep 2016 20:54:00 -0400
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Subject: add pthread_setname_np
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the thread name is displayed by gdb's "info threads".
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---
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include/pthread.h | 1 +
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src/thread/pthread_setname_np.c | 26 ++++++++++++++++++++++++++
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2 files changed, 27 insertions(+)
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create mode 100644 src/thread/pthread_setname_np.c
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diff --git a/include/pthread.h b/include/pthread.h
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index 3d2e0c4..94ef919 100644
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--- a/include/pthread.h
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+++ b/include/pthread.h
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@@ -214,6 +214,7 @@ struct cpu_set_t;
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int pthread_getaffinity_np(pthread_t, size_t, struct cpu_set_t *);
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int pthread_setaffinity_np(pthread_t, size_t, const struct cpu_set_t *);
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int pthread_getattr_np(pthread_t, pthread_attr_t *);
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+int pthread_setname_np(pthread_t, const char *);
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int pthread_tryjoin_np(pthread_t, void **);
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int pthread_timedjoin_np(pthread_t, void **, const struct timespec *);
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#endif
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diff --git a/src/thread/pthread_setname_np.c b/src/thread/pthread_setname_np.c
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new file mode 100644
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index 0000000..82d35e1
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--- /dev/null
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+++ b/src/thread/pthread_setname_np.c
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@@ -0,0 +1,26 @@
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+#define _GNU_SOURCE
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+#include <fcntl.h>
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+#include <string.h>
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+#include <unistd.h>
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+#include <sys/prctl.h>
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+
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+#include "pthread_impl.h"
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+
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+int pthread_setname_np(pthread_t thread, const char *name)
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+{
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+ int fd, cs, status = 0;
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+ char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)];
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+ size_t len;
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+
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+ if ((len = strnlen(name, 16)) > 15) return ERANGE;
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+
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+ if (thread == pthread_self())
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+ return prctl(PR_SET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0;
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+
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+ snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid);
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+ pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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+ if ((fd = open(f, O_WRONLY)) < 0 || write(fd, name, len) < 0) status = errno;
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+ if (fd >= 0) close(fd);
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+ pthread_setcancelstate(cs, 0);
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+ return status;
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+}
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--
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cgit v0.11.2
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