From bd3b9c4ca5e93f10f7fd891b8c07cc0c5dfd198f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?=C3=89rico=20Rolim?= Date: Tue, 20 Apr 2021 16:15:15 -0300 Subject: add pthread_getname_np function based on the pthread_setname_np implementation --- include/pthread.h | 1 + src/thread/pthread_getname_np.c | 25 +++++++++++++++++++++++++ 2 files changed, 26 insertions(+) create mode 100644 src/thread/pthread_getname_np.c diff --git a/include/pthread.h b/include/pthread.h index 0492f26a..89fd9ff7 100644 --- a/include/pthread.h +++ b/include/pthread.h @@ -221,6 +221,7 @@ int pthread_getaffinity_np(pthread_t, size_t, struct cpu_set_t *); int pthread_setaffinity_np(pthread_t, size_t, const struct cpu_set_t *); int pthread_getattr_np(pthread_t, pthread_attr_t *); int pthread_setname_np(pthread_t, const char *); +int pthread_getname_np(pthread_t, char *, size_t); int pthread_getattr_default_np(pthread_attr_t *); int pthread_setattr_default_np(const pthread_attr_t *); int pthread_tryjoin_np(pthread_t, void **); diff --git a/src/thread/pthread_getname_np.c b/src/thread/pthread_getname_np.c new file mode 100644 index 00000000..48d1a294 --- /dev/null +++ b/src/thread/pthread_getname_np.c @@ -0,0 +1,25 @@ +#define _GNU_SOURCE +#include +#include +#include + +#include "pthread_impl.h" + +int pthread_getname_np(pthread_t thread, char *name, size_t len) +{ + int fd, cs, status = 0; + char f[sizeof "/proc/self/task//comm" + 3*sizeof(int)]; + + if (len < 16) return ERANGE; + + if (thread == pthread_self()) + return prctl(PR_GET_NAME, (unsigned long)name, 0UL, 0UL, 0UL) ? errno : 0; + + snprintf(f, sizeof f, "/proc/self/task/%d/comm", thread->tid); + pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs); + if ((fd = open(f, O_RDONLY|O_CLOEXEC)) < 0 || (len = read(fd, name, len)) < 0) status = errno; + else name[len-1] = 0; /* remove trailing new line only if successful */ + if (fd >= 0) close(fd); + pthread_setcancelstate(cs, 0); + return status; +} -- cgit v1.2.1