#include "pthread_impl.h"
+#include "lock.h"
int pthread_kill(pthread_t t, int sig)
{
int r;
- __lock(t->killlock);
- r = t->dead ? ESRCH : -__syscall(SYS_tkill, t->tid, sig);
- __unlock(t->killlock);
+ sigset_t set;
+ /* Block not just app signals, but internal ones too, since
+ * pthread_kill is used to implement pthread_cancel, which
+ * must be async-cancel-safe. */
+ __block_all_sigs(&set);
+ LOCK(t->killlock);
+ r = t->tid ? -__syscall(SYS_tkill, t->tid, sig)
+ : (sig+0U >= _NSIG ? EINVAL : 0);
+ UNLOCK(t->killlock);
+ __restore_sigs(&set);
return r;
}