diff options
Diffstat (limited to 'winsup/cygwin/mmap.cc')
| -rw-r--r-- | winsup/cygwin/mmap.cc | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/winsup/cygwin/mmap.cc b/winsup/cygwin/mmap.cc index 059daa186..9daa32fd7 100644 --- a/winsup/cygwin/mmap.cc +++ b/winsup/cygwin/mmap.cc @@ -659,6 +659,34 @@ mmap_areas::del_list (mmap_list *ml) cfree (ml); } +/* This function allows an external function to test if a given memory + region is part of an mmapped memory region. */ +bool +is_mmapped_region (caddr_t start_addr, caddr_t end_address) +{ + bool ret = false; + + size_t len = end_address - start_addr; + + LIST_LOCK (); + mmap_list *map_list = mmapped_areas.get_list_by_fd (-1, NULL); + + mmap_record *rec; + caddr_t u_addr; + DWORD u_len; + + LIST_FOREACH (rec, &map_list->recs, mr_next) + { + if (rec->match (start_addr, len, u_addr, u_len)) + { + ret = true; + break; + } + } + LIST_UNLOCK (); + return ret; +} + /* This function is called from exception_handler when a segmentation violation has occurred. It should also be called from all Cygwin functions that want to support passing noreserve mmap page addresses @@ -677,6 +705,7 @@ mmap_areas::del_list (mmap_list *ml) On MAP_NORESERVE_COMMITED, the exeception handler should return 0 to allow the application to retry the memory access, or the calling Cygwin function should retry the Windows system call. */ + mmap_region_status mmap_is_attached_or_noreserve (void *addr, size_t len) { |