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Thu, 04 Jul 2024 17:34:42 -0700 (PDT) Received: from linaro.vn.shawcable.net ([2604:3d08:9384:1d00::2193]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1fb1a075616sm39008595ad.15.2024.07.04.17.34.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Jul 2024 17:34:41 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: Alexandre Iooss , Richard Henderson , Marcel Apfelbaum , Pierrick Bouvier , =?utf-8?q?Alex_Benn=C3=A9e?= , Paolo Bonzini , Yanan Wang , Mahmoud Mandour , Eduardo Habkost , =?utf-8?q?Philippe_Mathieu-Daud?= =?utf-8?q?=C3=A9?= , Xingtao Yao Subject: [PATCH v5 1/7] plugins: fix mem callback array size Date: Thu, 4 Jul 2024 17:34:15 -0700 Message-Id: <20240705003421.750895-2-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240705003421.750895-1-pierrick.bouvier@linaro.org> References: <20240705003421.750895-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 Received-SPF: pass client-ip=2607:f8b0:4864:20::62e; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pl1-x62e.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+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org data was correctly copied, but size of array was not set (g_array_sized_new only reserves memory, but does not set size). As a result, callbacks were not called for code path relying on plugin_register_vcpu_mem_cb(). Found when trying to trigger mem access callbacks for atomic instructions. Reviewed-by: Xingtao Yao Reviewed-by: Richard Henderson Signed-off-by: Pierrick Bouvier --- accel/tcg/plugin-gen.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/accel/tcg/plugin-gen.c b/accel/tcg/plugin-gen.c index b6bae32b997..ec89a085b43 100644 --- a/accel/tcg/plugin-gen.c +++ b/accel/tcg/plugin-gen.c @@ -85,8 +85,7 @@ static void gen_enable_mem_helper(struct qemu_plugin_tb *ptb, len = insn->mem_cbs->len; arr = g_array_sized_new(false, false, sizeof(struct qemu_plugin_dyn_cb), len); - memcpy(arr->data, insn->mem_cbs->data, - len * sizeof(struct qemu_plugin_dyn_cb)); + g_array_append_vals(arr, insn->mem_cbs->data, len); qemu_plugin_add_dyn_cb_arr(arr); tcg_gen_st_ptr(tcg_constant_ptr((intptr_t)arr), tcg_env,