* [PATCH] perf: Move debug initialization earlier
@ 2021-05-19 16:44 Ian Rogers
2021-05-27 15:51 ` Ian Rogers
0 siblings, 1 reply; 3+ messages in thread
From: Ian Rogers @ 2021-05-19 16:44 UTC (permalink / raw)
To: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
linux-perf-users, linux-kernel
Cc: eranian, Ian Rogers
This avoids segfaults during option handlers that use pr_err. For
example, "perf --debug nopager list" segfaults before this change.
Fixes: 8abceacff87d (perf debug: Add debug_set_file function)
Signed-off-by: Ian Rogers <irogers@google.com>
---
tools/perf/perf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/perf/perf.c b/tools/perf/perf.c
index 20cb91ef06ff..2f6b67189b42 100644
--- a/tools/perf/perf.c
+++ b/tools/perf/perf.c
@@ -443,6 +443,8 @@ int main(int argc, const char **argv)
const char *cmd;
char sbuf[STRERR_BUFSIZE];
+ perf_debug_setup();
+
/* libsubcmd init */
exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
pager_init(PERF_PAGER_ENVIRONMENT);
@@ -531,8 +533,6 @@ int main(int argc, const char **argv)
*/
pthread__block_sigwinch();
- perf_debug_setup();
-
while (1) {
static int done_help;
--
2.31.1.751.gd2f1c929bd-goog
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH] perf: Move debug initialization earlier
2021-05-19 16:44 [PATCH] perf: Move debug initialization earlier Ian Rogers
@ 2021-05-27 15:51 ` Ian Rogers
2021-05-27 16:25 ` Arnaldo Carvalho de Melo
0 siblings, 1 reply; 3+ messages in thread
From: Ian Rogers @ 2021-05-27 15:51 UTC (permalink / raw)
To: Peter Zijlstra, Ingo Molnar, Arnaldo Carvalho de Melo,
Mark Rutland, Alexander Shishkin, Jiri Olsa, Namhyung Kim,
linux-perf-users, LKML, Riccardo Mancini
Cc: Stephane Eranian
On Wed, May 19, 2021 at 9:44 AM Ian Rogers <irogers@google.com> wrote:
>
> This avoids segfaults during option handlers that use pr_err. For
> example, "perf --debug nopager list" segfaults before this change.
>
> Fixes: 8abceacff87d (perf debug: Add debug_set_file function)
> Signed-off-by: Ian Rogers <irogers@google.com>
Ping.
Thanks!
Ian
> ---
> tools/perf/perf.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> index 20cb91ef06ff..2f6b67189b42 100644
> --- a/tools/perf/perf.c
> +++ b/tools/perf/perf.c
> @@ -443,6 +443,8 @@ int main(int argc, const char **argv)
> const char *cmd;
> char sbuf[STRERR_BUFSIZE];
>
> + perf_debug_setup();
> +
> /* libsubcmd init */
> exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
> pager_init(PERF_PAGER_ENVIRONMENT);
> @@ -531,8 +533,6 @@ int main(int argc, const char **argv)
> */
> pthread__block_sigwinch();
>
> - perf_debug_setup();
> -
> while (1) {
> static int done_help;
>
> --
> 2.31.1.751.gd2f1c929bd-goog
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] perf: Move debug initialization earlier
2021-05-27 15:51 ` Ian Rogers
@ 2021-05-27 16:25 ` Arnaldo Carvalho de Melo
0 siblings, 0 replies; 3+ messages in thread
From: Arnaldo Carvalho de Melo @ 2021-05-27 16:25 UTC (permalink / raw)
To: Ian Rogers
Cc: Peter Zijlstra, Ingo Molnar, Mark Rutland, Alexander Shishkin,
Jiri Olsa, Namhyung Kim, linux-perf-users, LKML, Riccardo Mancini,
Stephane Eranian
Em Thu, May 27, 2021 at 08:51:41AM -0700, Ian Rogers escreveu:
> On Wed, May 19, 2021 at 9:44 AM Ian Rogers <irogers@google.com> wrote:
> >
> > This avoids segfaults during option handlers that use pr_err. For
> > example, "perf --debug nopager list" segfaults before this change.
> >
> > Fixes: 8abceacff87d (perf debug: Add debug_set_file function)
> > Signed-off-by: Ian Rogers <irogers@google.com>
>
> Ping.
I thought I had this one in, its now, will go to Linus probably tomorrow,
- Arnaldo
> Thanks!
> Ian
>
> > ---
> > tools/perf/perf.c | 4 ++--
> > 1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/perf/perf.c b/tools/perf/perf.c
> > index 20cb91ef06ff..2f6b67189b42 100644
> > --- a/tools/perf/perf.c
> > +++ b/tools/perf/perf.c
> > @@ -443,6 +443,8 @@ int main(int argc, const char **argv)
> > const char *cmd;
> > char sbuf[STRERR_BUFSIZE];
> >
> > + perf_debug_setup();
> > +
> > /* libsubcmd init */
> > exec_cmd_init("perf", PREFIX, PERF_EXEC_PATH, EXEC_PATH_ENVIRONMENT);
> > pager_init(PERF_PAGER_ENVIRONMENT);
> > @@ -531,8 +533,6 @@ int main(int argc, const char **argv)
> > */
> > pthread__block_sigwinch();
> >
> > - perf_debug_setup();
> > -
> > while (1) {
> > static int done_help;
> >
> > --
> > 2.31.1.751.gd2f1c929bd-goog
> >
--
- Arnaldo
^ permalink raw reply [flat|nested] 3+ messages in thread
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2021-05-19 16:44 [PATCH] perf: Move debug initialization earlier Ian Rogers
2021-05-27 15:51 ` Ian Rogers
2021-05-27 16:25 ` Arnaldo Carvalho de Melo
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