- /* Getting the pid/tid pair is not atomic, and could give wrong
- * result if a fork occurs in a signal handler between the two
- * syscalls. Use the tgkill syscall's ESRCH semantics to detect
- * this condition and retry. */
- do {
- tid = syscall0(__NR_gettid);
- pid = syscall0(__NR_getpid);
- ret = syscall3(__NR_tgkill, pid, tid, sig);
- } while (ret<0 && errno == ESRCH);
+ sigset_t set;
+ __block_app_sigs(&set);
+ tid = __syscall(SYS_gettid);
+ pid = __syscall(SYS_getpid);
+ ret = syscall(SYS_tgkill, pid, tid, sig);
+ __restore_sigs(&set);