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eshi: fix access race to thread index tree 

Signed-off-by: Philippe Gerum <rpm@xenomai.org>
This commit is contained in:
Philippe Gerum 2020-03-28 16:46:00 +01:00
parent f518a3cab9
commit a69800b16b
1 changed files with 8 additions and 0 deletions
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8
eshi/thread.c
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@ -22,6 +22,8 @@ struct evl_tsd {
pthread_t thread;
} evl_tsd;
static pthread_mutex_t evl_tsd_lock = PTHREAD_MUTEX_INITIALIZER;
static pthread_key_t tsd_key;
static void *fdtree_root;
@ -51,7 +53,9 @@ int evl_attach_self(const char *fmt, ...)
evl_tsd.fd = fd;
evl_tsd.thread = pthread_self();
pthread_mutex_lock(&evl_tsd_lock);
node = (struct evl_tsd **)tsearch(&evl_tsd, &fdtree_root, compare_nodes);
pthread_mutex_unlock(&evl_tsd_lock);
if (!node) {
close(fd);
return -ENOMEM;
@ -71,7 +75,9 @@ int evl_detach_self(void)
return -EPERM;
pthread_setspecific(tsd_key, NULL);
pthread_mutex_lock(&evl_tsd_lock);
tdelete(&evl_tsd, &fdtree_root, compare_nodes);
pthread_mutex_unlock(&evl_tsd_lock);
close(evl_efd);
evl_efd = -1;
@ -89,7 +95,9 @@ pthread_t eshi_find_thread_by_fd(int fd)
.fd = fd,
}, **node;
pthread_mutex_lock(&evl_tsd_lock);
node = tsearch(&tsd, &fdtree_root, compare_nodes);
pthread_mutex_unlock(&evl_tsd_lock);
if (!node)
return (pthread_t)NULL;