From patchwork Wed Jun 30 15:19:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Siddhesh Poyarekar X-Patchwork-Id: 44054 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 36FCB3853829 for ; Wed, 30 Jun 2021 15:20:52 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 36FCB3853829 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1625066452; bh=oreuInd9Yt17qVUGO/a8VPP2yI1uavS/KYgjRz5LBKs=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:Cc:From; b=hT6Fjfli53E5aTx8srOK7AiXiNbC08xZK8t3HeRxJdxko9xB67qL/38roy6H0Km1+ snoaixzRSuSBWl6sZOH16ujblLWmuG75UUPzlc1N7jHrwzCyXO4ojUkt1D6+0DkZlt zAVK2womannZkBA0KhnRYXOA2qu7ihtOuvhsgXAI= X-Original-To: libc-alpha@sourceware.org Delivered-To: libc-alpha@sourceware.org Received: from black.elm.relay.mailchannels.net (black.elm.relay.mailchannels.net [23.83.212.19]) by sourceware.org (Postfix) with ESMTPS id D319A380042E for ; Wed, 30 Jun 2021 15:19:39 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org D319A380042E X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id 71D3E781CD7; Wed, 30 Jun 2021 15:19:36 +0000 (UTC) Received: from pdx1-sub0-mail-a91.g.dreamhost.com (100-98-55-130.trex-nlb.outbound.svc.cluster.local [100.98.55.130]) (Authenticated sender: dreamhost) by relay.mailchannels.net (Postfix) with ESMTPA id E517278175F; Wed, 30 Jun 2021 15:19:35 +0000 (UTC) X-Sender-Id: dreamhost|x-authsender|siddhesh@gotplt.org Received: from pdx1-sub0-mail-a91.g.dreamhost.com (pop.dreamhost.com [64.90.62.162]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384) by 100.98.55.130 (trex/6.3.3); Wed, 30 Jun 2021 15:19:36 +0000 X-MC-Relay: Neutral X-MailChannels-SenderId: dreamhost|x-authsender|siddhesh@gotplt.org X-MailChannels-Auth-Id: dreamhost X-Reign-Cure: 6a0965b57373e75f_1625066376248_3882173393 X-MC-Loop-Signature: 1625066376248:1510436715 X-MC-Ingress-Time: 1625066376248 Received: from pdx1-sub0-mail-a91.g.dreamhost.com (localhost [127.0.0.1]) by pdx1-sub0-mail-a91.g.dreamhost.com (Postfix) with ESMTP id 7741D7E6CF; Wed, 30 Jun 2021 08:19:35 -0700 (PDT) Received: from rhbox.intra.reserved-bit.com (unknown [1.186.101.110]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: siddhesh@gotplt.org) by pdx1-sub0-mail-a91.g.dreamhost.com (Postfix) with ESMTPSA id 030D87E6B2; Wed, 30 Jun 2021 08:19:31 -0700 (PDT) X-DH-BACKEND: pdx1-sub0-mail-a91 To: libc-alpha@sourceware.org Subject: [PATCH v2 00/10] Remove malloc hooks Date: Wed, 30 Jun 2021 20:49:11 +0530 Message-Id: <20210630151921.2752628-1-siddhesh@sourceware.org> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 X-Spam-Status: No, score=-3486.9 required=5.0 tests=BAYES_00, JMQ_SPF_NEUTRAL, KAM_DMARC_NONE, KAM_DMARC_STATUS, RCVD_IN_BARRACUDACENTRAL, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NEUTRAL, TXREP autolearn=no autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: libc-alpha@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Libc-alpha mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Siddhesh Poyarekar via Libc-alpha From: Siddhesh Poyarekar Reply-To: Siddhesh Poyarekar Cc: fweimer@redhat.com Errors-To: libc-alpha-bounces+patchwork=sourceware.org@sourceware.org Sender: "Libc-alpha" This patchset removes the malloc hooks __malloc_hook, __free_hook, __realloc_hook and __memalign_hook from the API and leaves compatibility symbols so that existing applications can continue to link to them. The reading and execution of the hooks has been moved to a DSO libmalloc_compathooks.so, which can be preloaded for applications that need it. By default these hooks no longer have any effect in the library. Further, the __morecore, __morecore_after_hook and __default_morecore hooks have also been moved to compat symbols and removed from the API. Existing applications will continue to link to them but they won't have any effect on malloc behaviour. Most of the malloc tests now run one additional time to verify mcheck() behaviour, specifically with -lmcheck. To enable this, the MALLOC_CHECK_, mcheck() and mtrace() hooks have been weaned away from hooks. In the process, some mcheck() failures have been fixed and the overall behaviour is now simpler to follow. Finally, tr_break and mallwatch symbols have been deprecated and are not used anywhere. Users are advised to use gdb watchpoints and conditional breakpoints to debug malloc internals since they ought to provide equivalent functionality. Changes from v1: - Added makefile dependencies for the new hooks files - Fixed memset call in calloc debugging hooks - Added the tr_break deprecation patch and mcheck test patch to this series Siddhesh Poyarekar (10): mtrace: Deprecate mallwatch and tr_break Add mcheck tests to malloc Move glibc.malloc.check implementation into its own file malloc: Move malloc hook references to hooks.c glibc.malloc.check: Wean away from malloc hooks mcheck: Wean away from malloc hooks mtrace: Wean away from malloc hooks Remove malloc hooks Remove __after_morecore_hook Remove __morecore and __default_morecore Makeconfig | 2 +- NEWS | 18 + Rules | 15 +- include/malloc.h | 11 +- include/stdlib.h | 3 - malloc/Makefile | 49 +- malloc/Versions | 3 + malloc/arena.c | 26 +- malloc/hooks.c | 545 +++++++----------- malloc/malloc-check.c | 376 ++++++++++++ malloc/malloc-compathooks.c | 166 ++++++ malloc/malloc-internal.h | 6 + malloc/malloc.c | 235 ++++---- malloc/malloc.h | 27 - malloc/mcheck-hooks.c | 411 +++++++++++++ malloc/mcheck-init.c | 14 +- malloc/mcheck.c | 369 +----------- malloc/morecore.c | 15 +- malloc/mtrace-hooks.c | 137 +++++ malloc/mtrace.c | 276 +-------- manual/memory.texi | 191 +----- sysdeps/mach/hurd/i386/libc.abilist | 1 + sysdeps/unix/sysv/linux/aarch64/libc.abilist | 1 + sysdeps/unix/sysv/linux/alpha/libc.abilist | 1 + sysdeps/unix/sysv/linux/arc/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/arm/le/libc.abilist | 1 + sysdeps/unix/sysv/linux/csky/libc.abilist | 1 + sysdeps/unix/sysv/linux/hppa/libc.abilist | 1 + sysdeps/unix/sysv/linux/i386/libc.abilist | 1 + sysdeps/unix/sysv/linux/ia64/libc.abilist | 1 + .../sysv/linux/m68k/coldfire/libc.abilist | 1 + .../unix/sysv/linux/m68k/m680x0/libc.abilist | 1 + .../sysv/linux/microblaze/be/libc.abilist | 1 + .../sysv/linux/microblaze/le/libc.abilist | 1 + .../sysv/linux/mips/mips32/fpu/libc.abilist | 1 + .../sysv/linux/mips/mips32/nofpu/libc.abilist | 1 + .../sysv/linux/mips/mips64/n32/libc.abilist | 1 + .../sysv/linux/mips/mips64/n64/libc.abilist | 1 + sysdeps/unix/sysv/linux/nios2/libc.abilist | 1 + .../linux/powerpc/powerpc32/fpu/libc.abilist | 1 + .../powerpc/powerpc32/nofpu/libc.abilist | 1 + .../linux/powerpc/powerpc64/be/libc.abilist | 1 + .../linux/powerpc/powerpc64/le/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv32/libc.abilist | 1 + .../unix/sysv/linux/riscv/rv64/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-32/libc.abilist | 1 + .../unix/sysv/linux/s390/s390-64/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/be/libc.abilist | 1 + sysdeps/unix/sysv/linux/sh/le/libc.abilist | 1 + .../sysv/linux/sparc/sparc32/libc.abilist | 1 + .../sysv/linux/sparc/sparc64/libc.abilist | 1 + .../unix/sysv/linux/x86_64/64/libc.abilist | 1 + .../unix/sysv/linux/x86_64/x32/libc.abilist | 1 + 54 files changed, 1594 insertions(+), 1334 deletions(-) create mode 100644 malloc/malloc-check.c create mode 100644 malloc/malloc-compathooks.c create mode 100644 malloc/mcheck-hooks.c create mode 100644 malloc/mtrace-hooks.c