Purge unpinned ashmem before parsing /proc/$pid/smaps.

third_party/ashmem/ashmem.h

 /* third_party/ashmem/ashmem.h
  **
  ** Copyright 2008 The Android Open Source Project
  **
  ** This file is dual licensed.  It may be redistributed and/or modified
  ** under the terms of the Apache 2.0 License OR version 2 of the GNU
  ** General Public License.
  */
 
 #ifndef _THIRD_PARTY_ASHMEM_H
 #define _THIRD_PARTY_ASHMEM_H
 
 #include <stddef.h>
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 int ashmem_create_region(const char *name, size_t size);
 int ashmem_set_prot_region(int fd, int prot);
 int ashmem_pin_region(int fd, size_t offset, size_t len);
 int ashmem_unpin_region(int fd, size_t offset, size_t len);
 int ashmem_get_size_region(int fd);
+int ashmem_purge_all(void);
 
 #ifdef __cplusplus
 }
 #endif
 
 #ifndef __ASHMEMIOC     /* in case someone included <linux/ashmem.h> too */
 
 #define ASHMEM_NAME_LEN         256
 
 #define ASHMEM_NAME_DEF         "dev/ashmem"
 
 /* Return values from ASHMEM_PIN: Was the mapping purged while unpinned? */
 #define ASHMEM_NOT_PURGED       0
 #define ASHMEM_WAS_PURGED       1
 
 /* Return values from ASHMEM_UNPIN: Is the mapping now pinned or unpinned? */
 #define ASHMEM_IS_UNPINNED      0
 #define ASHMEM_IS_PINNED        1
 
 #endif  /* ! __ASHMEMIOC */
 
 #endif  /* _THIRD_PARTY_ASHMEM_H */