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Tue, 6 Nov 2018 12:06:10 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=greensocs.com; s=mail; t=1541502371; bh=WgnMQ5pr+n/ESL8puF7jtpCC/FdzwfDNBDnQ0ACltqA=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=R4N11l2tv026tICF5QcMKE9GdctVx+m843XPTPvZ0tvJOnAU0b6RQ2bm3pKeyoZjZ 8Wr21x0Uco3kFN7UDS+sUW2m63ZdFEDwZSL1JoZeF788Q3odXQjGSmVhOj9dlB226H JAvxuiLe7Lyvfa4iwtMSDyGxHZHgOAAzSzNs/Ubs= From: Luc Michel To: qemu-devel@nongnu.org Date: Tue, 6 Nov 2018 12:05:46 +0100 Message-Id: <20181106110548.4209-15-luc.michel@greensocs.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20181106110548.4209-1-luc.michel@greensocs.com> References: <20181106110548.4209-1-luc.michel@greensocs.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 193.104.36.180 Subject: [Qemu-devel] [PATCH v4 14/16] gdbstub: gdb_set_stop_cpu: ignore request when process is not attached X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Eduardo Habkost , alistair@alistair23.me, mark.burton@greensocs.com, =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , saipava@xilinx.com, edgari@xilinx.com, qemu-arm@nongnu.org, Luc Michel Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP When gdb_set_stop_cpu() is called with a CPU associated to a process currently not attached by the GDB client, return without modifying the stop CPU. Otherwise, GDB gets confused if it receives packets with a thread-id it does not know about. Signed-off-by: Luc Michel Acked-by: Alistair Francis --- gdbstub.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/gdbstub.c b/gdbstub.c index 1a3353ff3c..c662ada6ff 100644 --- a/gdbstub.c +++ b/gdbstub.c @@ -1787,10 +1787,19 @@ static int gdb_handle_packet(GDBState *s, const char *line_buf) return RS_IDLE; } void gdb_set_stop_cpu(CPUState *cpu) { + GDBProcess *p = gdb_get_cpu_process(gdbserver_state, cpu); + + if (!p->attached) { + /* Having a stop CPU corresponding to a process that is not attached + * confuses GDB. So we ignore the request. + */ + return; + } + gdbserver_state->c_cpu = cpu; gdbserver_state->g_cpu = cpu; } #ifndef CONFIG_USER_ONLY