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| author | Markus Armbruster <armbru@redhat.com> | 2025-09-23 11:09:48 +0200 |
|---|---|---|
| committer | Markus Armbruster <armbru@redhat.com> | 2025-09-30 14:43:52 +0200 |
| commit | 548f1abacbcd53947060a8b05b74d5d1539f87b3 (patch) | |
| tree | 6a717c97664080fe8ee89250d662902f5ba425e8 | |
| parent | 9b16edec6e9a483469c789475b2065d26b52db35 (diff) | |
| download | focaccia-qemu-548f1abacbcd53947060a8b05b74d5d1539f87b3.tar.gz focaccia-qemu-548f1abacbcd53947060a8b05b74d5d1539f87b3.zip | |
monitor: Clean up HMP gdbserver error reporting
HMP command gdbserver used to emit two error messages for certain
errors. For instance, with -M none:
(qemu) gdbserver
gdbstub: meaningless to attach gdb to a machine without any CPU.
Could not open gdbserver on device 'tcp::1234'
The first message is the specific error, and the second one a generic
additional message that feels superfluous to me.
Commit c0e6b8b798b (system: propagate Error to gdbserver_start (and
other device setups)) turned the first message into a warning:
warning: gdbstub: meaningless to attach gdb to a machine without any CPU.
Could not open gdbserver on device 'tcp::1234'
This is arguably worse.
hmp_gdbserver() passes &error_warn to gdbserver_start(), so that
failure gets reported as warning, and then additionally emits the
generic error on failure. This is a misuse of &error_warn.
Instead, receive the error in &err and report it, as usual. With
this, gdbserver reports just the error:
gdbstub: meaningless to attach gdb to a machine without any CPU.
Cc: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20250923091000.3180122-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Akihiko Odaki <odaki@rsg.ci.i.u-tokyo.ac.jp>
| -rw-r--r-- | include/exec/gdbstub.h | 3 | ||||
| -rw-r--r-- | monitor/hmp-cmds.c | 7 |
2 files changed, 4 insertions, 6 deletions
diff --git a/include/exec/gdbstub.h b/include/exec/gdbstub.h index a16c0051ce..bd7182c4d3 100644 --- a/include/exec/gdbstub.h +++ b/include/exec/gdbstub.h @@ -55,9 +55,6 @@ void gdb_unregister_coprocessor_all(CPUState *cpu); * system emulation you can use a full chardev spec for your gdbserver * port. * - * The error handle should be either &error_fatal (for start-up) or - * &error_warn (for QMP/HMP initiated sessions). - * * Returns true when server successfully started. */ bool gdbserver_start(const char *port_or_device, Error **errp); diff --git a/monitor/hmp-cmds.c b/monitor/hmp-cmds.c index 74a0f56566..33a88ce205 100644 --- a/monitor/hmp-cmds.c +++ b/monitor/hmp-cmds.c @@ -280,14 +280,15 @@ void hmp_log(Monitor *mon, const QDict *qdict) void hmp_gdbserver(Monitor *mon, const QDict *qdict) { + Error *err = NULL; const char *device = qdict_get_try_str(qdict, "device"); + if (!device) { device = "tcp::" DEFAULT_GDBSTUB_PORT; } - if (!gdbserver_start(device, &error_warn)) { - monitor_printf(mon, "Could not open gdbserver on device '%s'\n", - device); + if (!gdbserver_start(device, &err)) { + error_report_err(err); } else if (strcmp(device, "none") == 0) { monitor_printf(mon, "Disabled gdbserver\n"); } else { |