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Tue, 26 Oct 2021 03:29:19 -0700 (PDT) Received: from zen.lan (localhost [127.0.0.1]) by zen.linaroharston (Postfix) with ESMTP id 56A781FFB3; Tue, 26 Oct 2021 11:22:36 +0100 (BST) From: =?UTF-8?q?Alex=20Benn=C3=A9e?= To: qemu-devel@nongnu.org Subject: [PATCH v1 18/28] chardev: don't exit() straight away on C-a x Date: Tue, 26 Oct 2021 11:22:24 +0100 Message-Id: <20211026102234.3961636-19-alex.bennee@linaro.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211026102234.3961636-1-alex.bennee@linaro.org> References: <20211026102234.3961636-1-alex.bennee@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::429; envelope-from=alex.bennee@linaro.org; helo=mail-wr1-x429.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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: fam@euphon.net, minyihh@uci.edu, berrange@redhat.com, kuhn.chenqun@huawei.com, =?UTF-8?q?Lukas=20J=C3=BCnger?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , f4bug@amsat.org, robhenry@microsoft.com, mahmoudabdalghany@outlook.com, aaron@os.amperecomputing.com, cota@braap.org, stefanha@redhat.com, crosa@redhat.com, pbonzini@redhat.com, ma.mandourr@gmail.com, =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= , aurelien@aurel32.net Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" While there are a number of uses in the code-base of the exit(0) pattern it gets in the way of clean exit which can do all of it's house-keeping. In particular it was reported that you can crash plugins this way because TCG can still be running on other threads when the atexit callback is called. Use qmp_quit() instead which takes care of some housekeeping before triggering the shutdown. Signed-off-by: Alex Bennée Reported-by: Lukas Jünger Reviewed-by: Marc-André Lureau Message-Id: <20211018140226.838137-1-alex.bennee@linaro.org> Reviewed-by: Philippe Mathieu-Daudé Acked-by: Paolo Bonzini Message-Id: <20211019092901.1519570-1-alex.bennee@linaro.org> --- chardev/char-mux.c | 3 ++- stubs/qmp-quit.c | 8 ++++++++ stubs/meson.build | 1 + 3 files changed, 11 insertions(+), 1 deletion(-) create mode 100644 stubs/qmp-quit.c diff --git a/chardev/char-mux.c b/chardev/char-mux.c index ada0c6866f..ee2d47b20d 100644 --- a/chardev/char-mux.c +++ b/chardev/char-mux.c @@ -28,6 +28,7 @@ #include "qemu/option.h" #include "chardev/char.h" #include "sysemu/block-backend.h" +#include "qapi/qapi-commands-control.h" #include "chardev-internal.h" /* MUX driver for serial I/O splitting */ @@ -157,7 +158,7 @@ static int mux_proc_byte(Chardev *chr, MuxChardev *d, int ch) { const char *term = "QEMU: Terminated\n\r"; qemu_chr_write_all(chr, (uint8_t *)term, strlen(term)); - exit(0); + qmp_quit(NULL); break; } case 's': diff --git a/stubs/qmp-quit.c b/stubs/qmp-quit.c new file mode 100644 index 0000000000..a3ff47f7bd --- /dev/null +++ b/stubs/qmp-quit.c @@ -0,0 +1,8 @@ +#include "qemu/osdep.h" +#include "qapi/qapi-commands-control.h" +#include "qapi/qmp/dispatch.h" + +void qmp_quit(Error **errp) +{ + g_assert_not_reached(); +} diff --git a/stubs/meson.build b/stubs/meson.build index f6aa3aa94f..71469c1d50 100644 --- a/stubs/meson.build +++ b/stubs/meson.build @@ -31,6 +31,7 @@ stub_ss.add(files('pci-bus.c')) stub_ss.add(files('qemu-timer-notify-cb.c')) stub_ss.add(files('qmp_memory_device.c')) stub_ss.add(files('qmp-command-available.c')) +stub_ss.add(files('qmp-quit.c')) stub_ss.add(files('qtest.c')) stub_ss.add(files('ram-block.c')) stub_ss.add(files('ramfb.c')) -- 2.30.2