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Re: [Qemu-ppc] [PATCH v2] monitor: fix dangling CPU pointer
From: |
Greg Kurz |
Subject: |
Re: [Qemu-ppc] [PATCH v2] monitor: fix dangling CPU pointer |
Date: |
Tue, 17 Oct 2017 10:09:56 +0200 |
On Tue, 17 Oct 2017 09:52:02 +0200
Igor Mammedov <address@hidden> wrote:
> On Mon, 16 Oct 2017 20:47:56 +0200
> Greg Kurz <address@hidden> wrote:
>
> ...
> > Note that the resolution should really return a CPU object, otherwise
> > we have a bug. This is achieved by relying on object_resolve_path()
> > and CPU() instead of calling object_resolve_path_type(path, TYPE_CPU).
> Did you forget to remove this part?
>
Argh yes I did... :-\ I'll send a v3 right away.
> >
> > Reported-by: Satheesh Rajendran <address@hidden>
> > Suggested-by: Igor Mammedov <address@hidden>
> > Signed-off-by: Greg Kurz <address@hidden>
> > ---
> > v2: - use object_resolve_path_type()
> > - add Reported-by tag
> > ---
> > monitor.c | 23 ++++++++++++++++++-----
> > 1 file changed, 18 insertions(+), 5 deletions(-)
> >
> > diff --git a/monitor.c b/monitor.c
> > index fe0d1bdbb461..ce577e46e568 100644
> > --- a/monitor.c
> > +++ b/monitor.c
> > @@ -200,7 +200,7 @@ struct Monitor {
> >
> > ReadLineState *rs;
> > MonitorQMP qmp;
> > - CPUState *mon_cpu;
> > + gchar *mon_cpu_path;
> > BlockCompletionFunc *password_completion_cb;
> > void *password_opaque;
> > mon_cmd_t *cmd_table;
> > @@ -579,6 +579,7 @@ static void monitor_data_init(Monitor *mon)
> >
> > static void monitor_data_destroy(Monitor *mon)
> > {
> > + g_free(mon->mon_cpu_path);
> > qemu_chr_fe_deinit(&mon->chr, false);
> > if (monitor_is_qmp(mon)) {
> > json_message_parser_destroy(&mon->qmp.parser);
> > @@ -1047,20 +1048,32 @@ int monitor_set_cpu(int cpu_index)
> > if (cpu == NULL) {
> > return -1;
> > }
> > - cur_mon->mon_cpu = cpu;
> > + g_free(cur_mon->mon_cpu_path);
> > + cur_mon->mon_cpu_path = object_get_canonical_path(OBJECT(cpu));
> > return 0;
> > }
> >
> > CPUState *mon_get_cpu(void)
> > {
> > - if (!cur_mon->mon_cpu) {
> > + CPUState *cpu;
> > +
> > + if (cur_mon->mon_cpu_path) {
> > + cpu = (CPUState *) object_resolve_path_type(cur_mon->mon_cpu_path,
> > + TYPE_CPU, NULL);
> > + if (!cpu) {
> > + g_free(cur_mon->mon_cpu_path);
> > + cur_mon->mon_cpu_path = NULL;
> > + }
> > + }
> > + if (!cur_mon->mon_cpu_path) {
> > if (!first_cpu) {
> > return NULL;
> > }
> > monitor_set_cpu(first_cpu->cpu_index);
> > + cpu = first_cpu;
> > }
> > - cpu_synchronize_state(cur_mon->mon_cpu);
> > - return cur_mon->mon_cpu;
> > + cpu_synchronize_state(cpu);
> > + return cpu;
> > }
> >
> > CPUArchState *mon_get_cpu_env(void)
> >
>