tools/perf/perf-sys.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _PERF_SYS_H
   3 #define _PERF_SYS_H
   4
   5 #include <unistd.h>
   6 #include <sys/types.h>
   7 #include <sys/syscall.h>
   8 #include <linux/compiler.h>
   9
  10 struct perf_event_attr;
  11
  12 extern bool test_attr__enabled;
  13 void test_attr__ready(void);
  14 void test_attr__init(void);
  15 void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
  16                      int fd, int group_fd, unsigned long flags);
  17
  18 #ifndef HAVE_ATTR_TEST
  19 #define HAVE_ATTR_TEST 1
  20 #endif
  21
  22 static inline int
  23 sys_perf_event_open(struct perf_event_attr *attr,
  24                       pid_t pid, int cpu, int group_fd,
  25                       unsigned long flags)
  26 {
  27         int fd;
  28
  29         fd = syscall(__NR_perf_event_open, attr, pid, cpu,
  30                      group_fd, flags);
  31
  32 #if HAVE_ATTR_TEST
  33         if (unlikely(test_attr__enabled))
  34                 test_attr__open(attr, pid, cpu, fd, group_fd, flags);
  35 #endif
  36         return fd;
  37 }
  38
  39 #endif /* _PERF_SYS_H */