tools/perf/trace/beauty/futex_op.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 #include <linux/futex.h>
   3
   4 #ifndef FUTEX_WAIT_BITSET
   5 #define FUTEX_WAIT_BITSET         9
   6 #endif
   7 #ifndef FUTEX_WAKE_BITSET
   8 #define FUTEX_WAKE_BITSET        10
   9 #endif
  10 #ifndef FUTEX_WAIT_REQUEUE_PI
  11 #define FUTEX_WAIT_REQUEUE_PI    11
  12 #endif
  13 #ifndef FUTEX_CMP_REQUEUE_PI
  14 #define FUTEX_CMP_REQUEUE_PI     12
  15 #endif
  16 #ifndef FUTEX_CLOCK_REALTIME
  17 #define FUTEX_CLOCK_REALTIME    256
  18 #endif
  19
  20 static size_t syscall_arg__scnprintf_futex_op(char *bf, size_t size, struct syscall_arg *arg)
  21 {
  22         bool show_prefix = arg->show_string_prefix;
  23         const char *prefix = "FUTEX_";
  24         enum syscall_futex_args {
  25                 SCF_UADDR   = (1 << 0),
  26                 SCF_OP      = (1 << 1),
  27                 SCF_VAL     = (1 << 2),
  28                 SCF_TIMEOUT = (1 << 3),
  29                 SCF_UADDR2  = (1 << 4),
  30                 SCF_VAL3    = (1 << 5),
  31         };
  32         int op = arg->val;
  33         int cmd = op & FUTEX_CMD_MASK;
  34         size_t printed = 0;
  35
  36         switch (cmd) {
  37 #define P_FUTEX_OP(n) case FUTEX_##n: printed = scnprintf(bf, size, "%s%s", show_prefix ? prefix : "", #n);
  38         P_FUTEX_OP(WAIT);           arg->mask |= SCF_VAL3|SCF_UADDR2;             break;
  39         P_FUTEX_OP(WAKE);           arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  40         P_FUTEX_OP(FD);             arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  41         P_FUTEX_OP(REQUEUE);        arg->mask |= SCF_VAL3|SCF_TIMEOUT;            break;
  42         P_FUTEX_OP(CMP_REQUEUE);    arg->mask |= SCF_TIMEOUT;                     break;
  43         P_FUTEX_OP(CMP_REQUEUE_PI); arg->mask |= SCF_TIMEOUT;                     break;
  44         P_FUTEX_OP(WAKE_OP);                                                      break;
  45         P_FUTEX_OP(LOCK_PI);        arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  46         P_FUTEX_OP(UNLOCK_PI);      arg->mask |= SCF_VAL3|SCF_UADDR2|SCF_TIMEOUT; break;
  47         P_FUTEX_OP(TRYLOCK_PI);     arg->mask |= SCF_VAL3|SCF_UADDR2;             break;
  48         P_FUTEX_OP(WAIT_BITSET);    arg->mask |= SCF_UADDR2;                      break;
  49         P_FUTEX_OP(WAKE_BITSET);    arg->mask |= SCF_UADDR2;                      break;
  50         P_FUTEX_OP(WAIT_REQUEUE_PI);                                              break;
  51         default: printed = scnprintf(bf, size, "%#x", cmd);                       break;
  52         }
  53
  54         if (op & FUTEX_PRIVATE_FLAG)
  55                 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "PRIVATE_FLAG");
  56
  57         if (op & FUTEX_CLOCK_REALTIME)
  58                 printed += scnprintf(bf + printed, size - printed, "|%s%s", show_prefix ? prefix : "", "CLOCK_REALTIME");
  59
  60         return printed;
  61 }
  62
  63 #define SCA_FUTEX_OP  syscall_arg__scnprintf_futex_op