From: Jeff King <peff@peff.net>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org
Subject: Re: [PATCH 4/6] prefix_filename: return newly allocated string
Date: Tue, 21 Mar 2017 14:23:35 -0400 [thread overview]
Message-ID: <20170321182335.3yrjkhk4mxhso73j@sigill.intra.peff.net> (raw)
In-Reply-To: <xmqqinn2qyyo.fsf@gitster.mtv.corp.google.com>
On Tue, Mar 21, 2017 at 11:14:23AM -0700, Junio C Hamano wrote:
> Jeff King <peff@peff.net> writes:
>
> > diff --git a/worktree.c b/worktree.c
> > index 42dd3d52b..2520fc65c 100644
> > --- a/worktree.c
> > +++ b/worktree.c
> > @@ -250,16 +250,19 @@ struct worktree *find_worktree(struct worktree **list,
> > {
> > struct worktree *wt;
> > char *path;
> > + char *to_free;
> >
> > if ((wt = find_worktree_by_suffix(list, arg)))
> > return wt;
> >
> > - arg = prefix_filename(prefix, arg);
> > + if (prefix)
> > + arg = to_free = prefix_filename(prefix, arg);
> > path = real_pathdup(arg, 1);
> > for (; *list; list++)
> > if (!fspathcmp(path, real_path((*list)->path)))
> > break;
> > free(path);
> > + free(to_free);
> > return *list;
> > }
>
> worktree.c:265:6: error: to_free may be used uninitialized in this function
Doh. I had originally written it without the "if (prefix)" and added it
as a micro-optimization at the end.
Still, the whole thing compiles fine for me. I find it odd that neither
gcc nor clang notices the problem on my system. It's quite obviously
wrong.
> diff --git a/worktree.c b/worktree.c
> index 2520fc65cc..bae787cf8d 100644
> --- a/worktree.c
> +++ b/worktree.c
> @@ -250,7 +250,7 @@ struct worktree *find_worktree(struct worktree **list,
> {
> struct worktree *wt;
> char *path;
> - char *to_free;
> + char *to_free = NULL;
Yep, this is the right fix. Thanks.
-Peff
next prev parent reply other threads:[~2017-03-21 18:25 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-03-21 1:18 [PATCH 0/6] prefix_filename cleanups Jeff King
2017-03-21 1:20 ` [PATCH 1/6] hash-object: fix buffer reuse with --path in a subdirectory Jeff King
2017-03-21 1:21 ` [PATCH 2/6] prefix_filename: move docstring to header file Jeff King
2017-03-21 1:22 ` [PATCH 3/6] prefix_filename: drop length parameter Jeff King
2017-03-21 1:28 ` [PATCH 4/6] prefix_filename: return newly allocated string Jeff King
2017-03-21 18:14 ` Junio C Hamano
2017-03-21 18:23 ` Jeff King [this message]
2017-03-21 23:32 ` Jeff King
2017-03-21 1:30 ` [PATCH 5/6] prefix_filename: simplify windows #ifdef Jeff King
2017-03-21 1:31 ` [PATCH 6/6] bundle: use prefix_filename with bundle path Jeff King
2017-03-21 17:53 ` [PATCH 0/6] prefix_filename cleanups Junio C Hamano
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