From: Po Lu via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
To: Yuan Fu <casouri@gmail.com>
Cc: Eli Zaretskii <eliz@gnu.org>,
Mickey Petersen <mickey@masteringemacs.org>,
60237@debbugs.gnu.org
Subject: bug#60237: 30.0.50; tree sitter core dumps when I edebug view a node
Date: Sun, 26 Feb 2023 10:37:17 +0800 [thread overview]
Message-ID: <87zg9117aa.fsf@yahoo.com> (raw)
In-Reply-To: <574817C4-3FD8-43EA-B53C-B2BCB60A6D0A@gmail.com> (Yuan Fu's message of "Sat, 25 Feb 2023 18:01:07 -0800")
Yuan Fu <casouri@gmail.com> writes:
> I had a look, and it seems legit. In tree-sitter, a TSTree (or more
> precisely, a Subtree) is just some inlined data plus a refcounted
> pointer to the complete data. This way multiple trees share common
> subtrees/nodes. Eg, when incrementally parsing, you pass in an old
> tree and get a new tree, these two trees will share the unchanged part
> of the tree.
>
> Therefore, deleting a tree is not simply free(). Instead, you
> decrement the refcount of the subtree, and if the count == 0, free the
> data and traverse the subtree and decrementing each children’s
> refcount, and delete them if the count == 0, and so on.
And what will happen if that malloc fails, while *freeing* memory?
Anyway, the profiler should either be fixed to not hook into xmalloc, or
(better) tree-sitter should be fixed to not call xmalloc during GC.
> To traverse the tree, the function uses an array as a stack, which
> calls array_push to push new elements, which may call malloc.
How deep are those trees?
next prev parent reply other threads:[~2023-02-26 2:37 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-21 12:24 bug#60237: 30.0.50; tree sitter core dumps when I edebug view a node Mickey Petersen
2022-12-24 7:23 ` Eli Zaretskii
2022-12-24 9:20 ` Yuan Fu
2022-12-29 14:21 ` Mickey Petersen
2023-02-24 23:22 ` Yuan Fu
2023-02-25 7:13 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-25 7:51 ` Eli Zaretskii
2023-02-26 2:01 ` Yuan Fu
2023-02-26 2:37 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors [this message]
2023-02-26 6:18 ` Eli Zaretskii
2023-02-26 6:14 ` Eli Zaretskii
2023-02-26 15:16 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-28 14:00 ` Eli Zaretskii
2023-03-01 4:07 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-01 13:27 ` Eli Zaretskii
2023-03-01 14:08 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-01 15:51 ` Eli Zaretskii
2023-03-01 17:39 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-04 12:21 ` Eli Zaretskii
2023-03-08 16:34 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-10 18:28 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-10 20:56 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-11 6:45 ` Eli Zaretskii
2023-03-11 17:45 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-10 23:52 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-11 2:41 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-11 3:29 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-11 3:38 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-02 5:53 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-03-02 20:24 ` Stefan Monnier via Bug reports for GNU Emacs, the Swiss army knife of text editors
2023-02-26 9:41 ` Mickey Petersen
2023-02-27 0:34 ` Yuan Fu
2023-02-27 8:22 ` Mickey Petersen
2023-02-27 9:05 ` Yuan Fu
2023-02-27 14:29 ` Mickey Petersen
2023-02-27 22:37 ` Yuan Fu
2023-02-27 22:45 ` Dmitry Gutov
2023-02-24 23:29 ` Yuan Fu
2023-02-25 7:55 ` Eli Zaretskii
2023-02-26 2:02 ` Yuan Fu
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