diff options
Diffstat (limited to 'gdb/frame.h')
| -rw-r--r-- | gdb/frame.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/gdb/frame.h b/gdb/frame.h index 2ab8b8edf6b..55d357cf14d 100644 --- a/gdb/frame.h +++ b/gdb/frame.h @@ -310,7 +310,22 @@ extern CORE_ADDR get_frame_base (struct frame_info *); /* Return the per-frame unique identifer. Can be used to relocate a frame after a frame cache flush (and other similar operations). If - FI is NULL, return the null_frame_id. */ + FI is NULL, return the null_frame_id. + + NOTE: kettenis/20040508: These functions return a structure. On + platforms where structures are returned in static storage (vax, + m68k), this may trigger compiler bugs in code like: + + if (frame_id_eq (get_frame_id (l), get_frame_id (r))) + + where the return value from the first get_frame_id (l) gets + overwritten by the second get_frame_id (r). Please avoid writing + code like this. Use code like: + + struct frame_id id = get_frame_id (l); + if (frame_id_eq (id, get_frame_id (r))) + + instead, since that avoids the bug. */ extern struct frame_id get_frame_id (struct frame_info *fi); extern struct frame_id frame_unwind_id (struct frame_info *next_frame); |