From: Adhemerval Zanella <adhemerval.zanella@linaro.org>
To: libc-alpha@sourceware.org
Subject: [PATCH 3/6] posix: Suppress -Os may be used uninitialized warnings on regexec
Date: Wed, 21 Sep 2022 10:51:05 -0300 [thread overview]
Message-ID: <20220921135108.3324737-4-adhemerval.zanella@linaro.org> (raw)
In-Reply-To: <20220921135108.3324737-1-adhemerval.zanella@linaro.org>
GCC with -Os issues may uninitialized warnings on regexec code.
Checked on x86_64-linux-gnu and i686-linux-gnu.
---
posix/regexec.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/posix/regexec.c b/posix/regexec.c
index cffeaf2845..386a757f35 100644
--- a/posix/regexec.c
+++ b/posix/regexec.c
@@ -3768,7 +3768,13 @@ check_node_accept_bytes (const re_dfa_t *dfa, Idx node_idx,
_NL_CURRENT (LC_COLLATE, _NL_COLLATE_SYMB_EXTRAMB);
for (i = 0; i < cset->ncoll_syms; ++i)
{
+ /* The compiler might warn that extra may be used uninitialized,
+ however the loop will be executed iff ncoll_syms is larger
+ than 0,which means extra will be already initialized. */
+ DIAG_PUSH_NEEDS_COMMENT;
+ DIAG_IGNORE_Os_NEEDS_COMMENT (8, "-Wmaybe-uninitialized");
const unsigned char *coll_sym = extra + cset->coll_syms[i];
+ DIAG_POP_NEEDS_COMMENT;
/* Compare the length of input collating element and
the length of current collating element. */
if (*coll_sym != elem_len)
--
2.34.1
next prev parent reply other threads:[~2022-09-21 13:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-21 13:51 [PATCH 0/6] Fix -Os build Adhemerval Zanella
2022-09-21 13:51 ` [PATCH 1/6] locale: prevent maybe-uninitialized errors with -Os [BZ #19444] Adhemerval Zanella
2022-10-05 13:39 ` Carlos O'Donell
2022-09-21 13:51 ` [PATCH 2/6] posix: Suppress -Os warnings on fnmatch Adhemerval Zanella
2022-10-05 13:47 ` Carlos O'Donell
2022-10-05 20:01 ` Paul Eggert
2022-09-21 13:51 ` Adhemerval Zanella [this message]
2022-10-05 13:49 ` [PATCH 3/6] posix: Suppress -Os may be used uninitialized warnings on regexec Carlos O'Donell
2022-09-21 13:51 ` [PATCH 4/6] rt: Initialize mq_send input on tst-mqueue{5,6} Adhemerval Zanella
2022-10-05 13:51 ` Carlos O'Donell
2022-09-21 13:51 ` [PATCH 5/6] sunrpc: Suppress GCC -Os warning on user2netname Adhemerval Zanella
2022-10-05 13:52 ` Carlos O'Donell
2022-09-21 13:51 ` [PATCH 6/6] x86: Fix -Os build (BZ #29576) Adhemerval Zanella
2022-10-05 14:10 ` Carlos O'Donell
2022-10-05 17:21 ` H.J. Lu
2022-10-05 17:38 ` Adhemerval Zanella Netto
2022-10-05 18:06 ` H.J. Lu
2022-10-05 20:43 ` Adhemerval Zanella Netto
2022-10-05 21:27 ` H.J. Lu
2022-10-05 13:40 ` [PATCH 0/6] Fix -Os build Carlos O'Donell
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