tools/perf/trace/beauty/futex_op.c

   1 #include <linux/futex.h>
   2
   3 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
   4 {
   5         enum syscall_futex_args {
   6                 SCF_UADDR   = (1 << 0),
   7                 SCF_OP      = (1 << 1),
   8                 SCF_VAL     = (1 << 2),
   9                 SCF_TIMEOUT = (1 << 3),
  10                 SCF_UADDR2  = (1 << 4),
  11                 SCF_VAL3    = (1 << 5),
  12         };
  13         int op = arg->val;
  14         int cmd = op & FUTEX_CMD_MASK;
  15         size_t printed = 0;
  16
  17         switch (cmd) {
  18 #define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, #n);
  19         P_FUTEX_OP(WAIT);           arg->mask |= SCF_VAL3|SCF_UADDR2;             break;
  20         P_FUTEX_OP(WAKE);           arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  21         P_FUTEX_OP(FD);             arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  22         P_FUTEX_OP(REQUEUE);        arg->mask |= SCF_VAL3|SCF_TIMEOUT;            break;
  23         P_FUTEX_OP(CMP_REQUEUE);    arg->mask |= SCF_TIMEOUT;                     break;
  24         P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT;                     break;
  25         P_FUTEX_OP(WAKE_OP);                                                      break;
  26         P_FUTEX_OP(LOCK_PI);        arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  27         P_FUTEX_OP(UNLOCK_PI);      arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  28         P_FUTEX_OP(TRYLOCK_PI);     arg->mask |= SCF_VAL3|SCF_UADDR2;             break;
  29         P_FUTEX_OP(WAIT_BITSET);    arg->mask |= SCF_UADDR2;                      break;
  30         P_FUTEX_OP(WAKE_BITSET);    arg->mask |= SCF_UADDR2;                      break;
  31         P_FUTEX_OP(WAIT_REQUEUE_PI);                                              break;
  32         default: printed = scnprintf(bf, size, "%#x", cmd);                       break;
  33         }
  34
  35         if (op & FUTEX_PRIVATE_FLAG)
  36                 printed += scnprintf(bf + printed, size - printed, "|PRIV");
  37
  38         if (op & FUTEX_CLOCK_REALTIME)
  39                 printed += scnprintf(bf + printed, size - printed, "|CLKRT");
  40
  41         return printed;
  42 }
  43
  44 #define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op