perf.c

   1 #include <errno.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <unistd.h>
   6 //#include <sys/syscall.h>   /* For SYS_xxx definitions */
   7 #include <asm/unistd.h>
   8
   9 #include "perf.h"
  10 #include "shm.h"
  11 #include "log.h"
  12 #include "sanitise.h"
  13
  14 void open_perf_fds(void)
  15 {
  16         int fd;
  17         unsigned int i = 0;
  18
  19         while (i < MAX_PERF_FDS) {
  20                 sanitise_perf_event_open(0);
  21                 fd = syscall(__NR_perf_event_open, shm->a1[0], shm->a2[0], shm->a3[0], shm->a4[0], shm->a5[0]);
  22                 if (fd != -1) {
  23                         shm->perf_fds[i] = fd;
  24                         output(2, "fd[%d] = perf\n", shm->perf_fds[i]);
  25                         i++;
  26                 } else {
  27                         if (errno == ENOSYS)
  28                                 return;
  29                 }
  30         }
  31 }