Linux-Sparse Archive on lore.kernel.org
 help / color / Atom feed
From: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
To: linux-sparse@vger.kernel.org
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
	Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Subject: [PATCH 03/13] flex-array: do not lay out invalid struct members
Date: Thu,  1 Oct 2020 01:18:18 +0200
Message-ID: <20200930231828.66751-4-luc.vanoostenryck@gmail.com> (raw)
In-Reply-To: <20200930231828.66751-1-luc.vanoostenryck@gmail.com>

Do not bother trying to lay out invalid struct members,
ignore them as it will avoid to special case them later.

Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
---
 symbol.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/symbol.c b/symbol.c
index 365351a0a756..4c93a0fb4880 100644
--- a/symbol.c
+++ b/symbol.c
@@ -121,10 +121,12 @@ static void lay_out_struct(struct symbol *sym, struct struct_union_info *info)
 	base_size = sym->bit_size; 
 
 	/*
-	 * Unsized arrays cause us to not align the resulting
-	 * structure size
+	 * If the member is unsized, either it's a flexible array or
+	 * it's invalid and a warning has already been issued.
 	 */
 	if (base_size < 0) {
+		if (!is_array_type(sym))
+			return;
 		info->align_size = 0;
 		base_size = 0;
 	}
-- 
2.28.0


  parent reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-30 23:18 [PATCH 00/13] add warnings for flexible arrays Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 01/13] flex-array: add testcases Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 02/13] flex-array: factor out common part of lay_out_{struct,union}() Luc Van Oostenryck
2020-09-30 23:18 ` Luc Van Oostenryck [this message]
2020-09-30 23:18 ` [PATCH 04/13] flex-array: flexible array members have zero size and alignment is OK Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 05/13] flex-array: detect structures with a flexible array member Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 06/13] flex-array: warn on flexible arrays in unions Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 07/13] flex-array: warn if flexible array is not last Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 08/13] flex-array: identify structures with a flexible array member Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 09/13] flex-array: add helper has_flexible_array() Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 10/13] flex-array: warn when using sizeof() on a flexible array Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 11/13] flex-array: warn an arrays containing " Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 12/13] flex-array: warn on flexible array in nested aggregate types Luc Van Oostenryck
2020-09-30 23:18 ` [PATCH 13/13] flex-array: warn when a flexible array member has some padding Luc Van Oostenryck
2020-10-01 16:34   ` Linus Torvalds
2020-10-01 19:17     ` Luc Van Oostenryck
2020-10-01 19:27       ` Linus Torvalds
2020-10-01 19:41         ` Luc Van Oostenryck
2020-10-01 19:51           ` Luc Van Oostenryck
2020-10-01 16:36 ` [PATCH 00/13] add warnings for flexible arrays Linus Torvalds

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200930231828.66751-4-luc.vanoostenryck@gmail.com \
    --to=luc.vanoostenryck@gmail.com \
    --cc=linux-sparse@vger.kernel.org \
    --cc=torvalds@linux-foundation.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-Sparse Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-sparse/0 linux-sparse/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-sparse linux-sparse/ https://lore.kernel.org/linux-sparse \
		linux-sparse@vger.kernel.org
	public-inbox-index linux-sparse

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-sparse


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git