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