intptr_t ti_sp; /* Unused. */
short int ti_flags; /* Unused. */
int ti_pri; /* Thread priority. */
- lwpid_t ti_lid; /* Unused. */
+ lwpid_t ti_lid; /* Kernel pid for this thread. */
sigset_t ti_sigmask; /* Signal mask. */
unsigned char ti_traceme; /* Nonzero if event reporting
enabled. */