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-rw-r--r--src/env/__init_tls.c1
-rw-r--r--src/process/fork.c3
-rw-r--r--src/thread/pthread_create.c1
-rw-r--r--src/thread/pthread_mutex_trylock.c10
4 files changed, 8 insertions, 7 deletions
diff --git a/src/env/__init_tls.c b/src/env/__init_tls.c
index e651c7a7..ac4d9e7f 100644
--- a/src/env/__init_tls.c
+++ b/src/env/__init_tls.c
@@ -18,6 +18,7 @@ int __init_tp(void *p)
 	libc.has_thread_pointer = 1;
 	td->tid = __syscall(SYS_set_tid_address, &td->tid);
 	td->locale = &libc.global_locale;
+	td->robust_list.head = &td->robust_list.head;
 	return 0;
 }
 
diff --git a/src/process/fork.c b/src/process/fork.c
index 43c52bc4..8d676828 100644
--- a/src/process/fork.c
+++ b/src/process/fork.c
@@ -25,7 +25,8 @@ pid_t fork(void)
 	if (libc.has_thread_pointer && !ret) {
 		pthread_t self = __pthread_self();
 		self->tid = __syscall(SYS_gettid);
-		memset(&self->robust_list, 0, sizeof self->robust_list);
+		self->robust_list.off = 0;
+		self->robust_list.pending = 0;
 		libc.threads_minus_1 = 0;
 	}
 	__restore_sigs(&set);
diff --git a/src/thread/pthread_create.c b/src/thread/pthread_create.c
index 893773fa..8b0135bc 100644
--- a/src/thread/pthread_create.c
+++ b/src/thread/pthread_create.c
@@ -268,6 +268,7 @@ int __pthread_create(pthread_t *restrict res, const pthread_attr_t *restrict att
 		do_sched = new->startlock[0] = 1;
 		__block_app_sigs(new->sigmask);
 	}
+	new->robust_list.head = &new->robust_list.head;
 	new->unblock_cancel = self->cancel;
 	new->canary = self->canary;
 
diff --git a/src/thread/pthread_mutex_trylock.c b/src/thread/pthread_mutex_trylock.c
index cb935651..0df3ce29 100644
--- a/src/thread/pthread_mutex_trylock.c
+++ b/src/thread/pthread_mutex_trylock.c
@@ -7,12 +7,6 @@ int __pthread_mutex_trylock_owner(pthread_mutex_t *m)
 	pthread_t self = __pthread_self();
 	int tid = self->tid;
 
-	if (!self->robust_list.off) {
-		__syscall(SYS_set_robust_list, &self->robust_list, 3*sizeof(long));
-		self->robust_list.head = &self->robust_list.head;
-		self->robust_list.off = (char*)&m->_m_lock-(char *)&m->_m_next;
-	}
-
 	old = m->_m_lock;
 	own = old & 0x7fffffff;
 	if (own == tid && (type&3) == PTHREAD_MUTEX_RECURSIVE) {
@@ -23,6 +17,10 @@ int __pthread_mutex_trylock_owner(pthread_mutex_t *m)
 	if (own == 0x40000000) return ENOTRECOVERABLE;
 
 	if (m->_m_type & 128) {
+		if (!self->robust_list.off) {
+			self->robust_list.off = (char*)&m->_m_lock-(char *)&m->_m_next;
+			__syscall(SYS_set_robust_list, &self->robust_list, 3*sizeof(long));
+		}
 		if (m->_m_waiters) tid |= 0x80000000;
 		self->robust_list.pending = &m->_m_next;
 	}