lib/libutil/kinfo_getvmmap.c

   1 #include <sys/cdefs.h>
   2 #ifdef __FBSDID
   3 __FBSDID("$FreeBSD: head/lib/libutil/kinfo_getvmmap.c 186512 2008-12-27 11:12:23Z rwatson $");
   4 #endif
   5 __RCSID("$NetBSD: kinfo_getvmmap.c,v 1.3 2015/09/26 20:28:55 christos Exp $");
   6
   7 #include <sys/param.h>
   8 #include <sys/user.h>
   9 #include <sys/sysctl.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <util.h>
  13 #include <uvm/uvm_param.h>
  14
  15 struct kinfo_vmentry *
  16 kinfo_getvmmap(pid_t pid, size_t *cntp)
  17 {
  18         int mib[5];
  19         int error;
  20         size_t len;
  21         struct kinfo_vmentry *kiv;
  22
  23         *cntp = 0;
  24         len = 0;
  25         mib[0] = CTL_VM;
  26         mib[1] = VM_PROC;
  27         mib[2] = VM_PROC_MAP;
  28         mib[3] = pid;
  29         mib[4] = sizeof(*kiv);
  30
  31         error = sysctl(mib, (u_int)__arraycount(mib), NULL, &len, NULL, 0);
  32         if (error)
  33                 return NULL;
  34
  35         len = len * 4 / 3;
  36
  37         kiv = malloc(len);
  38         if (kiv == NULL)
  39                 return NULL;
  40
  41         error = sysctl(mib, (u_int)__arraycount(mib), kiv, &len, NULL, 0);
  42         if (error) {
  43                 free(kiv);
  44                 return NULL;
  45         }
  46
  47         *cntp = len / sizeof(*kiv);
  48         return kiv;     /* Caller must free() return value */
  49 }