From patchwork Tue Jul 2 18:44:41 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierrick Bouvier X-Patchwork-Id: 13720148 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 46BEDC30658 for ; Tue, 2 Jul 2024 18:47:02 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sOiV3-0005KQ-Qe; Tue, 02 Jul 2024 14:45:10 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1sOiV1-0005K4-48 for qemu-devel@nongnu.org; Tue, 02 Jul 2024 14:45:07 -0400 Received: from mail-pj1-x102f.google.com ([2607:f8b0:4864:20::102f]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1sOiUy-00086W-RR for qemu-devel@nongnu.org; Tue, 02 Jul 2024 14:45:06 -0400 Received: by mail-pj1-x102f.google.com with SMTP id 98e67ed59e1d1-2c7b14bb4a5so3199272a91.0 for ; Tue, 02 Jul 2024 11:45:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1719945902; x=1720550702; darn=nongnu.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=zIXRNj6hv7VUKRowdbtUTlmEXvuNh+UxIOlvMPsMxoo=; b=O0ixsG+WGrwUX+gnI3g1/ncRa0fooqYjcXzjUA9BsZK97on1667YOipoAN+HBaY0CC AGWz8oO/UD/shPDpkRqD0ewmBSmgzdftHjQzvOZlzg102X0GxnJ92ScorM1liQxLSD67 BVTy2NEfqz8v5SDeNjQZzQwkKg0/GTgCCph8lHe+j8qpflEdjyNCe8khe8lliZl+GAhq hwTKcllObGcrWEX1p5Cbv+Do8XGjOZRRuOTAZ/HjFmb2/MuViAJ7e2j64I+Lyx4dNQi0 vU2MrAOSnhj0/sW/qERgTkLM+sQhhiaf40Zllr3ui/m49vZvCyuWzv0tqPFB5VCA9fFM o8lw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1719945902; x=1720550702; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=zIXRNj6hv7VUKRowdbtUTlmEXvuNh+UxIOlvMPsMxoo=; b=cuoNPCendfrJhJX9a+Kp9ALSXXiO3/YC94BTnwY7KkiCVI/mx0cLGJ01SIYBN1Gw28 xp0iQD1214jIrnKrQt7QPdX2hqgELu2LnXzHYbRVAj6M8BRJlYBmN/s/DDvExSeawZc4 4bbjHEXN+4PW3624EKF/aqfQhc1SFU+DbpRYlqwbgm6Z8t/KyUUZ+P5yYzGp4JkADQAQ mDPWj5Arp5uabfy8yby29eH6KbL6uuSUWeE3xAjZkdR1iTjGv0k72FVcx43Hz33JumDG dvL86nftvA9b6e+iKuct/4bEFbHfkMf/KwhsRE6D5SCAhmX/FzOKFFvjgcqDwMMmRV0/ /SIA== X-Gm-Message-State: AOJu0Yx7ySss6jkot/yx0kT0fa/Z726FecUXddD06vfmwZJMD7XCSCE6 LDT2bz+PsJVIArVXqjlJhHLkaPqWiqtgDk1eecZy8ElAcG63HqgLUNeq0Y7jDHuKcjro8AdhR3Q K X-Google-Smtp-Source: AGHT+IG/O8yf92G5TRqkc3SyUxMxpg+75yVqL8LwGvI3x36DGxLOG4lAfYcVtQRamGevs6FLK/Zk1Q== X-Received: by 2002:a17:90b:230f:b0:2c4:e2d6:8de6 with SMTP id 98e67ed59e1d1-2c93d2d18d8mr14683731a91.21.1719945901680; Tue, 02 Jul 2024 11:45:01 -0700 (PDT) Received: from linaro.vn.shawcable.net ([2604:3d08:9384:1d00::2193]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2c91d3e8196sm9257394a91.49.2024.07.02.11.45.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jul 2024 11:45:01 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: =?utf-8?q?Alex_Benn=C3=A9e?= , Mahmoud Mandour , Pierrick Bouvier , Alexandre Iooss , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Paolo Bonzini , Richard Henderson , Eduardo Habkost Subject: [PATCH v4 0/7] plugins: access values during a memory read/write Date: Tue, 2 Jul 2024 11:44:41 -0700 Message-Id: <20240702184448.551705-1-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::102f; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pj1-x102f.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org This series allows plugins to know which value is read/written during a memory access. For every memory access, we know copy this value before calling mem callbacks, and those can query it using new API function: - qemu_plugin_mem_get_value Mem plugin was extended to print accesses, and a new test was added to check functionality work as expected. A bug was found where callbacks were not called as expected. This will open new use cases for plugins, such as following specific values in memory. v4 - fix prototype for stubs qemu_plugin_vcpu_mem_cb (inverted low/high parameters names) - link gitlab bugs resolved (thanks @Anton Kochkov for reporting) https://gitlab.com/qemu-project/qemu/-/issues/1719 https://gitlab.com/qemu-project/qemu/-/issues/2152 v3 - simplify API: return an algebraic data type for value accessed this can be easily extended when QEMU will support wider accesses - fix Makefile test (use quiet-command instead of manually run the command) - rename upper/lower to high/low - reorder functions parameters and code to low/high instead of high/low, to follow current convention in QEMU codebase v2 - fix compilation on aarch64 (missing undef in accel/tcg/atomic_template.h) v3 - add info when printing memory accesses (insn_vaddr,mem_vaddr,mem_hwaddr) Pierrick Bouvier (7): plugins: fix mem callback array size plugins: save value during memory accesses plugins: extend API to get latest memory value accessed tests/tcg: add mechanism to run specific tests with plugins tests/tcg: allow to check output of plugins tests/plugin/mem: add option to print memory accesses tests/tcg/x86_64: add test for plugin memory access accel/tcg/atomic_template.h | 66 +++++++++++++-- include/qemu/plugin.h | 8 ++ include/qemu/qemu-plugin.h | 32 ++++++++ accel/tcg/plugin-gen.c | 3 +- plugins/api.c | 34 ++++++++ plugins/core.c | 7 ++ tcg/tcg-op-ldst.c | 72 +++++++++++++++-- tests/plugin/mem.c | 69 +++++++++++++++- tests/tcg/x86_64/test-plugin-mem-access.c | 89 +++++++++++++++++++++ accel/tcg/atomic_common.c.inc | 13 ++- accel/tcg/ldst_common.c.inc | 38 +++++---- plugins/qemu-plugins.symbols | 1 + tests/tcg/Makefile.target | 10 ++- tests/tcg/x86_64/Makefile.target | 7 ++ tests/tcg/x86_64/check-plugin-mem-access.sh | 48 +++++++++++ 15 files changed, 462 insertions(+), 35 deletions(-) create mode 100644 tests/tcg/x86_64/test-plugin-mem-access.c create mode 100755 tests/tcg/x86_64/check-plugin-mem-access.sh