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         struct syscallrecord* sc;
  17         unsigned int i = 0;
  18
  19         while (i < MAX_PERF_FDS) {
  20                 int fd;
  21
  22                 sanitise_perf_event_open(0);
  23                 sc = &shm->syscall[0];
  24                 fd = syscall(__NR_perf_event_open, sc->a1, sc->a2, sc->a3, sc->a4, sc->a5);
  25                 if (fd != -1) {
  26                         shm->perf_fds[i] = fd;
  27                         output(2, "fd[%d] = perf\n", shm->perf_fds[i]);
  28                         i++;
  29                 } else {
  30                         if (errno == ENOSYS)
  31                                 return;
  32                 }
  33         }
  34 }