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This introduces abstract QOM type "monitor", with concrete subtypes "monitor-hmp" and "monitor-qmp". This is the bare minimum conversion of just the type declarations and replacing g_new/g_free with object_new/object_unref. Command line option "-monitor" now creates a "monitor-hmp" object "/objects/compat_monitorNNN" in addition to the character device "/chardevs/compat_monitorNNN". NNN counts up from zero. Exception: "-monitor chardev:ID" creates a "monitor-hmp" object "/objects/ID", and does not create a character device. "-qmp" and "-qmp-pretty" work the same, except they create a "monitor-qmp" object. "-mon" now creates either a "monitor-hmp" or "monitor-qmp" object "/objects/ID" if the option argument provides an ID, else "/objects/compat_monitorNNN". "-gdbstub" and "-serial mon:..." now create a "monitor-hmp" object "/objects/compat_monitorNNN". Note that the object's name in "/objects/" matches the QemuOpts ID when it exists. The only cases where it doesn't exist are "-mon" without ID, "-gdbstub" and "-serial mon:". A future patch will make "monitor-hmp" and "monitor-qmp" work with "-object" and "object-add". Note: there is a slight change in the NNN values assigned. The old code would increment the counter for every monitor added (except for -mon, -serial mon:..., -gdbstub), regardless of whether it needed a "compat_monitorNNN" ID assignment. Now it is only incremented when an automatic ID assigned is needed (but even for -mon, -serial mon:..., -gdbstub). Signed-off-by: Daniel P. Berrangé <berrange@redhat.com> Message-ID: <20260706135824.2623960-6-berrange@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Commit message made slightly more precise] Signed-off-by: Markus Armbruster <armbru@redhat.com>