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{ "id": 2235052, "url": "http://patchwork.ozlabs.org/api/1.2/covers/2235052/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/cover/20260508132211.3504357-1-yury.khrustalev@arm.com/", "project": { "id": 41, "url": "http://patchwork.ozlabs.org/api/1.2/projects/41/?format=api", "name": "GNU C Library", "link_name": "glibc", "list_id": "libc-alpha.sourceware.org", "list_email": "libc-alpha@sourceware.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<20260508132211.3504357-1-yury.khrustalev@arm.com>", "list_archive_url": null, "date": "2026-05-08T13:22:08", "name": "[0/3] Remove broken memory tagging in malloc", "submitter": { "id": 88214, "url": "http://patchwork.ozlabs.org/api/1.2/people/88214/?format=api", "name": "Yury Khrustalev", "email": "yury.khrustalev@arm.com" }, "mbox": "http://patchwork.ozlabs.org/project/glibc/cover/20260508132211.3504357-1-yury.khrustalev@arm.com/mbox/", "series": [ { "id": 503390, "url": "http://patchwork.ozlabs.org/api/1.2/series/503390/?format=api", "web_url": "http://patchwork.ozlabs.org/project/glibc/list/?series=503390", "date": "2026-05-08T13:22:08", "name": "Remove broken memory tagging in malloc", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/503390/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/covers/2235052/comments/", "headers": { "Return-Path": "<libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "libc-alpha@sourceware.org" ], "Delivered-To": [ "patchwork-incoming@legolas.ozlabs.org", "libc-alpha@sourceware.org" ], "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (1024-bit key;\n unprotected) header.d=arm.com header.i=@arm.com header.a=rsa-sha256\n header.s=foss header.b=pLj69ogb;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=sourceware.org\n (client-ip=38.145.34.32; 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a=rsa-sha256; d=sourceware.org; s=key;\n t=1778246543; c=relaxed/simple;\n bh=TOYoqfwp5xFRd6/pnLZHbBTLPoYeI6wFJenwN7HI1Ok=;\n h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version;\n b=JxDA+q7YJEv4fhE+vtPQcJWBk/4Umme2CDBqtygZCvuM6iCWbkIYuH2wEW7Zyulypztf5JHQymqb6WYVRg5xx78P2WvFN9V2KBH7SyY1yyWjMkWjZGiyxxtyDMS8rN6lFZYg8K+JTWdfKkvPGwBYWCjO3jtg30Hvv1aqhuJl0G4=", "ARC-Authentication-Results": "i=1; sourceware.org;\n dkim=pass (1024-bit key, unprotected)\n header.d=arm.com header.i=@arm.com header.a=rsa-sha256 header.s=foss\n header.b=pLj69ogb", "DKIM-Signature": "v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss;\n t=1778246542; bh=TOYoqfwp5xFRd6/pnLZHbBTLPoYeI6wFJenwN7HI1Ok=;\n h=From:To:Cc:Subject:Date:From;\n b=pLj69ogbWBYG25dIfmCe5GZK/62Y5Xp43zw1T5hvFWM9kAwe+Mtc02Hj2jMZ3kAbH\n qvL8ep3pDo7+ELOVJjPtM9HmSoy3MTJfHF0QLCQusQijFAioT4GZ+lN26K8sFrmmmL\n mlgRXQMgWztC1tO/EMAOiKdhXjHKdWCTE82w1PA0=", "From": "Yury Khrustalev <yury.khrustalev@arm.com>", "To": "libc-alpha@sourceware.org", "Cc": "DJ Delorie <dj@redhat.com>,\n Adhemerval Zanella <adhemerval.zanella@linaro.org>,\n Andreas Schwab <schwab@suse.de>, Wilco Dijkstra <wilco.dijkstra@arm.com>,\n Florian Weimer <fweimer@redhat.com>", "Subject": "[PATCH 0/3] Remove broken memory tagging in malloc", "Date": "Fri, 8 May 2026 14:22:08 +0100", "Message-ID": "<20260508132211.3504357-1-yury.khrustalev@arm.com>", "X-Mailer": "git-send-email 2.47.3", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "X-BeenThere": "libc-alpha@sourceware.org", "X-Mailman-Version": "2.1.30", "Precedence": "list", "List-Id": "Libc-alpha mailing list <libc-alpha.sourceware.org>", "List-Unsubscribe": "<https://sourceware.org/mailman/options/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=unsubscribe>", "List-Archive": "<https://sourceware.org/pipermail/libc-alpha/>", "List-Post": "<mailto:libc-alpha@sourceware.org>", "List-Help": "<mailto:libc-alpha-request@sourceware.org?subject=help>", "List-Subscribe": "<https://sourceware.org/mailman/listinfo/libc-alpha>,\n <mailto:libc-alpha-request@sourceware.org?subject=subscribe>", "Errors-To": "libc-alpha-bounces~incoming=patchwork.ozlabs.org@sourceware.org" }, "content": "Remove broken bits from core malloc code and clean-up the\ncode. This includes:\n\n - Removing of the '--enable-memory-tagging' configure option\n (we will not need a separate build configuration for memory\n tagging, this should make testing much easier).\n - Removing of the 'USE_MTAG' macro and the 'glibc.mem.tagging'\n tunable.\n\nNo functional changes unrelated to memory tagging.\n\nThis is part of work to fix memory tagging in malloc that\nyou can see in [1]. Submitted as a separate patch series\nto make code review easier.\n\n[1]: https://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/arm/malloc-mte-v1\n\n---\nbase-commit: 37ee8868dc\n\nPasses regression on aarch64 and x86_64, also build-tested\nfor various targets using the build-many-glibcs script.\n\nOK for trunk?\n---\n\nYury Khrustalev (3):\n configure: remove --enable-memory-tagging option\n malloc: Remove code conditional on USE_MTAG\n malloc: Remove currently broken memory tagging\n\n INSTALL | 14 --\n config.h.in | 3 -\n config.make.in | 2 -\n configure | 24 --\n configure.ac | 15 --\n elf/dl-tunables.list | 5 -\n malloc/arena.c | 18 +-\n malloc/malloc-check.c | 26 +-\n malloc/malloc.c | 236 ++----------------\n manual/install.texi | 13 -\n manual/tunables.texi | 29 ---\n sysdeps/aarch64/Makefile | 9 +-\n ...__mtag_tag_region.S => __mte_tag_region.S} | 7 +-\n ..._zero_region.S => __mte_tag_region_zero.S} | 7 +-\n .../aarch64/{libc-mtag.h => aarch64-mte.h} | 73 +++---\n sysdeps/aarch64/cpu-features.h | 3 +-\n sysdeps/aarch64/dl-diagnostics-cpu.c | 2 -\n sysdeps/generic/libc-mtag.h | 73 ------\n .../unix/sysv/linux/aarch64/cpu-features.c | 28 ---\n 19 files changed, 70 insertions(+), 517 deletions(-)\n rename sysdeps/aarch64/{__mtag_tag_region.S => __mte_tag_region.S} (96%)\n rename sysdeps/aarch64/{__mtag_tag_zero_region.S => __mte_tag_region_zero.S} (95%)\n rename sysdeps/aarch64/{libc-mtag.h => aarch64-mte.h} (55%)\n delete mode 100644 sysdeps/generic/libc-mtag.h" }