PAL.C.T MINI SHELL
global threads;
global times;
probe syscall.semop,
syscall.semtimedop
{
sembuf_sz = & @cast(0, "struct sembuf")[1];
res = sprintf("set %d sems", semid)
%( systemtap_v < "2.3" %?
if (tsops_uaddr != 0) sops_uaddr = tsops_uaddr;
/* ignore warning for semtimedop's 'tsops_uaddr never-assigned'. */
%)
for(i = 0; i < nsops; i++) {
offset = i * sembuf_sz;
pointer = sops_uaddr + offset;
num_addr = & @cast(pointer, "struct sembuf")->sem_num;
num = user_short(num_addr);
res = sprintf("%s %d", res, num);
}
res = sprintf("%s\n", res);
threads[tid()] = res;
times[tid()] = gettimeofday_us();
}
probe syscall.semop.return,
syscall.semtimedop.return
{
printf("Thread %d took %dus to operate on %s\n", tid(),
gettimeofday_us() - times[tid()], threads[tid()]);
}
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