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Wed, 18 Sep 2024 14:07:26 -0700 (PDT) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , Elisha Hollander , Richard Henderson , Pierrick Bouvier , Alexandre Iooss , Mahmoud Mandour Subject: [PULL 18/18] contrib/plugins: avoid hanging program Date: Wed, 18 Sep 2024 22:07:12 +0100 Message-Id: <20240918210712.2336854-19-alex.bennee@linaro.org> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20240918210712.2336854-1-alex.bennee@linaro.org> References: <20240918210712.2336854-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a00:1450:4864:20::52b; envelope-from=alex.bennee@linaro.org; helo=mail-ed1-x52b.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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1726693742215116600 Although we asks for instructions per second we work in quanta and that cannot be 0. Fail to load the plugin instead and report the minimum IPS we can handle. Reported-by: Elisha Hollander Reviewed-by: Richard Henderson Signed-off-by: Alex Benn=C3=A9e Reviewed-by: Pierrick Bouvier Message-Id: <20240916085400.1046925-19-alex.bennee@linaro.org> diff --git a/contrib/plugins/ips.c b/contrib/plugins/ips.c index 29fa556d0f..e5297dbb01 100644 --- a/contrib/plugins/ips.c +++ b/contrib/plugins/ips.c @@ -152,6 +152,12 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin= _id_t id, vcpus =3D qemu_plugin_scoreboard_new(sizeof(vCPUTime)); max_insn_per_quantum =3D max_insn_per_second / NUM_TIME_UPDATE_PER_SEC; =20 + if (max_insn_per_quantum =3D=3D 0) { + fprintf(stderr, "minimum of %d instructions per second needed\n", + NUM_TIME_UPDATE_PER_SEC); + return -1; + } + time_handle =3D qemu_plugin_request_time_control(); g_assert(time_handle); =20 --=20 2.39.5