mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2026-04-20 14:25:40 +00:00
Code Issues Packages Projects Releases Wiki Activity

wayland: Allocate the cursor shared memory buffer entirely in memory, if possible.

Browse Source 
Use memfd_create() to allocate the temporary SHM backing file in memory, and set the size with posix_fallocate(), which will return an error on insufficient space vs ftruncate(), which will silently succeed and allow a SIGBUS error to occur if the unbacked memory is accessed.

Additionally, make the legacy path more robust by unlinking the temp file, so it won't persist after close, and unmapping the shared memory buffer.
This commit is contained in:
Frank Praznik
2024-03-12 17:39:32 -04:00
parent 41b7036f37
commit 9bdb992925
3 changed files with 72 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/build_config/SDL_build_config.h.cmake
View File

@@ -186,6 +186,8 @@
#cmakedefine HAVE_FOPEN64 1
#cmakedefine HAVE_FSEEKO 1
#cmakedefine HAVE_FSEEKO64 1
#cmakedefine HAVE_MEMFD_CREATE 1
#cmakedefine HAVE_POSIX_FALLOCATE 1
#cmakedefine HAVE_SIGACTION 1
#cmakedefine HAVE_SA_SIGACTION 1
#cmakedefine HAVE_SETJMP 1