Switch sanitizer_procmaps_bsd to internal_sysctl

[krytarowski]

Summary

Stop using directly sysctl(3) routines in sanitizer_procmaps_bsd
and replace it with internal_sysctl().

This will allow to install interceptors for sysctl(3).

lib/sanitizer_common/sanitizer_procmaps_bsd.cc

#elif SANITIZER_NETBSD
     VM_PROC_MAP,
     getpid(),
     sizeof(struct kinfo_vmentry)
 #else
 #error "not supported"
 #endif
   };
 
-  size_t Size = 0;
-  int Err = sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
+  uptr Size = 0;
+  int Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), NULL, &Size, NULL, 0);
   CHECK_EQ(Err, 0);
   CHECK_GT(Size, 0);
 
 #if !SANITIZER_OPENBSD
   size_t MmapedSize = Size * 4 / 3;
   void *VmMap = MmapOrDie(MmapedSize, "ReadProcMaps()");
   Size = MmapedSize;
-  Err = sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
+  Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), VmMap, &Size, NULL, 0);
   CHECK_EQ(Err, 0);
   proc_maps->data = (char *)VmMap;
 #else
   size_t PageSize = GetPageSize();
   size_t MmapedSize = Size;
   MmapedSize = ((MmapedSize - 1) / PageSize + 1) * PageSize;
   char *Mem = (char *)MmapOrDie(MmapedSize, "ReadProcMaps()");
   Size = 2 * Size + 10 * sizeof(struct kinfo_vmentry);
   if (Size > 0x10000)
     Size = 0x10000;
   Size = (Size / sizeof(struct kinfo_vmentry)) * sizeof(struct kinfo_vmentry);
-  Err = sysctl(Mib, ARRAY_SIZE(Mib), Mem, &Size, NULL, 0);
+  Err = internal_sysctl(Mib, ARRAY_SIZE(Mib), Mem, &Size, NULL, 0);
   CHECK_EQ(Err, 0);
   MmapedSize = Size;
   proc_maps->data = Mem;
 #endif
 
   proc_maps->mmaped_size = MmapedSize;
   proc_maps->len = Size;
 }