commit | 962dd7ebc3e76afc2c896d377c319f8140966303 | [log] [tgz] |
---|---|---|
author | Martin Ågren <martin.agren@gmail.com> | Sun Sep 27 15:15:43 2020 +0200 |
committer | Junio C Hamano <gitster@pobox.com> | Sun Sep 27 14:21:47 2020 -0700 |
tree | 0d91180f628c4bafd721d636e0b537575885fdff | |
parent | 8f7e3de0970c419688f23f505b5cb7a9690d9b09 [diff] |
wt-status: introduce wt_status_state_free_buffers() When we have a `struct wt_status_state`, we manually free its `branch`, `onto` and `detached_from`, or sometimes just one or two of them. Provide a function `wt_status_state_free_buffers()` which does the freeing. The callers are still aware of these fields, e.g., they check whether `branch` was populated or not. But this way, they don't need to know about *all* of them, and if `struct wt_status_state` gets more fields, they will not need to learn to free them. Users of `struct wt_status` (which contains a `wt_status_state`) already have `wt_status_collect_free_buffers()` (corresponding to `wt_status_collect()`) which we can also teach to use this new helper. Finally, note that we're currently leaving dangling pointers behind. Some callers work on a stack-allocated struct, where this is obviously ok. But for the users of `run_status()` in builtin/commit.c, there are ample opportunities for someone to mistakenly use those dangling pointers. We seem to be ok for now, but it's a use-after-free waiting to happen. Let's leave NULL-pointers behind instead. Signed-off-by: Martin Ågren <martin.agren@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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