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GET /api/patches/2225877/?format=api
{ "id": 2225877, "url": "http://patchwork.ozlabs.org/api/patches/2225877/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/patch/aee0VThalXlyO9JV@tucnak/", "project": { "id": 17, "url": "http://patchwork.ozlabs.org/api/projects/17/?format=api", "name": "GNU Compiler Collection", "link_name": "gcc", "list_id": "gcc-patches.gcc.gnu.org", "list_email": "gcc-patches@gcc.gnu.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<aee0VThalXlyO9JV@tucnak>", "list_archive_url": null, "date": "2026-04-21T17:31:01", "name": "c: Fix counted_by attribute error recovery [PR124969]", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "51f0e505419a20d8ae5d3fd06747abf017d8dd55", "submitter": { "id": 671, "url": "http://patchwork.ozlabs.org/api/people/671/?format=api", "name": "Jakub Jelinek", "email": "jakub@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/gcc/patch/aee0VThalXlyO9JV@tucnak/mbox/", "series": [ { "id": 500860, "url": "http://patchwork.ozlabs.org/api/series/500860/?format=api", "web_url": "http://patchwork.ozlabs.org/project/gcc/list/?series=500860", "date": "2026-04-21T17:31:01", "name": "c: Fix counted_by attribute error recovery [PR124969]", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/500860/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2225877/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2225877/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "gcc-patches@gcc.gnu.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=Wswwa1c+;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org\n (client-ip=2620:52:6:3111::32; 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Tue, 21 Apr 2026 17:31:03 +0000 (UTC)", "from tucnak.zalov.cz (localhost [127.0.0.1])\n by tucnak.zalov.cz (8.18.1/8.18.1) with ESMTPS id 63LHV19T931454\n (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT);\n Tue, 21 Apr 2026 19:31:01 +0200", "(from jakub@localhost)\n by tucnak.zalov.cz (8.18.1/8.18.1/Submit) id 63LHV1w6931453;\n Tue, 21 Apr 2026 19:31:01 +0200" ], "DKIM-Filter": [ "OpenDKIM Filter v2.11.0 sourceware.org B650E4BA9021", "OpenDKIM Filter v2.11.0 sourceware.org 9FEE64BA2E3C" ], "DMARC-Filter": "OpenDMARC Filter v1.4.2 sourceware.org 9FEE64BA2E3C", "ARC-Filter": "OpenARC Filter v1.0.0 sourceware.org 9FEE64BA2E3C", "ARC-Seal": "i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1776792669; cv=none;\n b=EYQt29eMA6mD6bLbDwUFLxaKhw1VuKwhaNxU98gAPUPgTY3niQGQvubk2G9bpuIcIrpD2cSGzP28MMb8q1c9zORjrh+ySW+3dMzTBPo+N+sysn6X9nXQiwBH/0wRJvy9p8cjUwpRP+zFrQzMEuPAwrsI/WurWP3S8PUF+HP/xBg=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=sourceware.org; s=key;\n t=1776792669; c=relaxed/simple;\n bh=bwzDJ7Fhhv+OcPGYyDsjXqnO60+K9dRQBymRze+TPYU=;\n h=DKIM-Signature:Date:From:To:Subject:Message-ID:MIME-Version;\n b=euGIBFDjNseWn6/NJJJCJqBX06CDrMc64+5aTqPN9b1JtARdj3UH9wuVFYtlAg6dejuf+5Atq+xiGnOCJmfH50KKMgF3JjbH5l7U3lAuAgcRxq7W0ZAg5HcfLyXqGl/FwbKQqibjC4AoUgE/gQEgiy0HgG1gWVPL0IV7JpfMD8w=", "ARC-Authentication-Results": "i=1; server2.sourceware.org", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com;\n s=mimecast20190719; t=1776792669;\n h=from:from:reply-to:reply-to:subject:subject:date:date:\n message-id:message-id:to:to:cc:cc:mime-version:mime-version:\n content-type:content-type; bh=slAUUX6RUyxFJHh07OWFA+zZvY9Dk2XiOYHqtlmmaxI=;\n b=Wswwa1c+VRSjpNNSBr5uFhuEFbu4/CRdZgC+93xY2L599SYJYqnW2KKyRTpX2szcH5MZFd\n wpcNNedYCJgFd+ppd4k/XcdDoL/30k+VimyBmJQawFB+DT/jZ5guw9aV8s3UmmQSv9Zou7\n yr95i9FBlLuM1QmFpAZRSYs644J8qF4=", "X-MC-Unique": "vNu2coRrNc2Jz197FRCHEQ-1", "X-Mimecast-MFC-AGG-ID": "vNu2coRrNc2Jz197FRCHEQ_1776792666", "Date": "Tue, 21 Apr 2026 19:31:01 +0200", "From": "Jakub Jelinek <jakub@redhat.com>", "To": "\"Joseph S. Myers\" <josmyers@redhat.com>,\n Marek Polacek <polacek@redhat.com>, Richard Biener <rguenther@suse.de>", "Cc": "gcc-patches@gcc.gnu.org", "Subject": "[PATCH] c: Fix counted_by attribute error recovery [PR124969]", "Message-ID": "<aee0VThalXlyO9JV@tucnak>", "MIME-Version": "1.0", "X-Scanned-By": "MIMEDefang 3.4.1 on 10.30.177.4", "X-Mimecast-Spam-Score": "0", "X-Mimecast-MFC-PROC-ID": "_yAKd5RMGMZfvOJSYpMTHG29ZTrrWlPepVFTwwSvQbM_1776792666", "X-Mimecast-Originator": "redhat.com", "Content-Type": "text/plain; charset=us-ascii", "Content-Disposition": "inline", "X-BeenThere": "gcc-patches@gcc.gnu.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Gcc-patches mailing list <gcc-patches.gcc.gnu.org>", "List-Unsubscribe": "<https://gcc.gnu.org/mailman/options/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=unsubscribe>", "List-Archive": "<https://gcc.gnu.org/pipermail/gcc-patches/>", "List-Post": "<mailto:gcc-patches@gcc.gnu.org>", "List-Help": "<mailto:gcc-patches-request@gcc.gnu.org?subject=help>", "List-Subscribe": "<https://gcc.gnu.org/mailman/listinfo/gcc-patches>,\n <mailto:gcc-patches-request@gcc.gnu.org?subject=subscribe>", "Reply-To": "Jakub Jelinek <jakub@redhat.com>", "Errors-To": "gcc-patches-bounces~incoming=patchwork.ozlabs.org@gcc.gnu.org" }, "content": "Hi!\n\nThe last patch made me try also pointer arithmetics on incomplete\ntype. And here we ICE before actually diagnosing the error\nbecause we try to dereference element_size.\n\nFurthermore, TYPE_SIZE_UNIT (element_type) is in sizetype, so\nwe shouldn't use build_one_cst (size_type_node) for the void *\ncase, but size_one_node (aka size_int (1)).\n\nOk for trunk if it passes full bootstrap/regtest?\n\n2026-04-21 Jakub Jelinek <jakub@redhat.com>\n\n\tPR sanitizer/124969\n\t* c-typeck.cc (build_access_with_size_for_counted_by): Use\n\tsize_one_node instead of build_one_cst (size_type_node). Punt\n\tif element_size is NULL_TREE.\n\n\t* gcc.dg/ubsan/pr124969-2.c: New test.\n\n\n\tJakub", "diff": "--- gcc/c/c-typeck.cc.jj\t2026-04-01 19:09:38.324343805 +0200\n+++ gcc/c/c-typeck.cc\t2026-04-21 19:16:20.325644120 +0200\n@@ -3270,8 +3270,10 @@ build_access_with_size_for_counted_by (l\n \n tree element_type = TREE_TYPE (TREE_TYPE (ref));\n tree element_size = VOID_TYPE_P (element_type)\n-\t\t ? build_one_cst (size_type_node)\n+\t\t ? size_one_node\n \t\t : TYPE_SIZE_UNIT (element_type);\n+ if (element_size == NULL_TREE)\n+ return ref;\n \n tree first_param = is_fam\n \t\t ? c_fully_fold (array_to_pointer_conversion (loc, ref),\n--- gcc/testsuite/gcc.dg/ubsan/pr124969-2.c.jj\t2026-04-21 19:19:31.114417366 +0200\n+++ gcc/testsuite/gcc.dg/ubsan/pr124969-2.c\t2026-04-21 19:20:29.357432321 +0200\n@@ -0,0 +1,15 @@\n+/* PR sanitizer/124969 */\n+/* { dg-do compile } */\n+/* { dg-options \"-fsanitize=undefined\" } */\n+\n+struct T;\n+struct S {\n+ int c;\n+ struct T *b __attribute__ ((counted_by (c)));\n+} a;\n+\n+void *\n+foo ()\n+{\n+ return a.b + 10;\t/* { dg-error \"invalid use of undefined type 'struct T'\" } */\n+}\n", "prefixes": [] }