tools/perf/trace/beauty/perf_event_open.c

   1 // SPDX-License-Identifier: LGPL-2.1
   2 #ifndef PERF_FLAG_FD_NO_GROUP
   3 # define PERF_FLAG_FD_NO_GROUP          (1UL << 0)
   4 #endif
   5
   6 #ifndef PERF_FLAG_FD_OUTPUT
   7 # define PERF_FLAG_FD_OUTPUT            (1UL << 1)
   8 #endif
   9
  10 #ifndef PERF_FLAG_PID_CGROUP
  11 # define PERF_FLAG_PID_CGROUP           (1UL << 2) /* pid=cgroup id, per-cpu mode only */
  12 #endif
  13
  14 #ifndef PERF_FLAG_FD_CLOEXEC
  15 # define PERF_FLAG_FD_CLOEXEC           (1UL << 3) /* O_CLOEXEC */
  16 #endif
  17
  18 static size_t syscall_arg__scnprintf_perf_flags(char *bf, size_t size,
  19                                                 struct syscall_arg *arg)
  20 {
  21         bool show_prefix = arg->show_string_prefix;
  22         const char *prefix = "PERF_";
  23         int printed = 0, flags = arg->val;
  24
  25         if (flags == 0)
  26                 return 0;
  27
  28 #define P_FLAG(n) \
  29         if (flags & PERF_FLAG_##n) { \
  30                 printed += scnprintf(bf + printed, size - printed, "%s%s%s", printed ? "|" : "", show_prefix ? prefix : "", #n); \
  31                 flags &= ~PERF_FLAG_##n; \
  32         }
  33
  34         P_FLAG(FD_NO_GROUP);
  35         P_FLAG(FD_OUTPUT);
  36         P_FLAG(PID_CGROUP);
  37         P_FLAG(FD_CLOEXEC);
  38 #undef P_FLAG
  39
  40         if (flags)
  41                 printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "|" : "", flags);
  42
  43         return printed;
  44 }
  45
  46 #define SCA_PERF_FLAGS syscall_arg__scnprintf_perf_flags