eina_file: fix unmap of unmapped region when Eina_File has copied data and not a map;

Summary:
This was causing problems on non-Linux architectures as eina_file_real_close unmapped not mapped data. Added a "copied" flag to Eina_File which is set on eina_file_virtualize (on copied data), and tested for when eina_file_real_close does the unmap. I'm surprised Linux allowed this. Certainly all of the BSDs crashed with the previous behaviour.

@fix T5479

Test Plan: Example inlcude Rage and Enlightenment Thumb on BSD systems which use eina_file_virtualize with emotion to obtain album artwork.

Reviewers: raster, cedric, jpeg

Reviewed By: jpeg

Maniphest Tasks: T5479

Differential Revision: https://phab.enlightenment.org/D5006

1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib/eina/eina_file.c b/src/lib/eina/eina_file.c
index 4a0c782..2fae7b7 100644
--- a/src/lib/eina/eina_file.c
+++ b/src/lib/eina/eina_file.c
@@ -295,7 +295,7 @@ eina_file_real_close(Eina_File *file)
         free(map);
      }
 
-   if (file->global_map != MAP_FAILED)
+   if (!file->copied && file->global_map != MAP_FAILED)
      munmap(file->global_map, file->length);
 
    if (file->fd != -1) close(file->fd);