linux-kernel - Re: [PATCH V4 2/3] tools/perf: Use is_perf_pid_map_name helper function to check dso's of pattern /tmp/perf-%d.map

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Date: Tue, 25 Jun 2024 11:06:10 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Adrian Hunter <adrian.hunter@...el.com>
Cc: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>, acme@...nel.org, jolsa@...nel.org, 
	irogers@...gle.com, linux-kernel@...r.kernel.org, 
	linux-perf-users@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, 
	akanksha@...ux.ibm.com, maddy@...ux.ibm.com, kjain@...ux.ibm.com, 
	disgoel@...ux.vnet.ibm.com
Subject: Re: [PATCH V4 2/3] tools/perf: Use is_perf_pid_map_name helper
 function to check dso's of pattern /tmp/perf-%d.map

On Tue, Jun 25, 2024 at 5:03 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 23/06/24 09:48, Athira Rajeev wrote:
> > commit 80d496be89ed ("perf report: Add support for profiling JIT
> > generated code") added support for profiling JIT generated code.
> > This patch handles dso's of form "/tmp/perf-$PID.map".
> >
> > Some of the references doesn't check exactly for same pattern.
> > some uses "if (!strncmp(dso_name, "/tmp/perf-", 10))". Fix
> > this by using helper function perf_pid_map_tid and
> > is_perf_pid_map_name which looks for proper pattern of
> > form: "/tmp/perf-$PID.map" for these checks.
> >
> > Signed-off-by: Athira Rajeev <atrajeev@...ux.vnet.ibm.com>
>
> Add a Fixes tag, then
>
> Reviewed-by: Adrian Hunter <adrian.hunter@...el.com>

Thanks, but I'm not sure which commit I can add the Fixes tag because
the original commit 80d496be89ed is too old and I'm sure we added a
lot of changes after that.

Namhyung


>
> > ---
> >  tools/perf/util/dsos.c    | 2 +-
> >  tools/perf/util/srcline.c | 2 +-
> >  2 files changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/perf/util/dsos.c b/tools/perf/util/dsos.c
> > index ab3d0c01dd63..846828ea1f00 100644
> > --- a/tools/perf/util/dsos.c
> > +++ b/tools/perf/util/dsos.c
> > @@ -275,7 +275,7 @@ static void dso__set_basename(struct dso *dso)
> >       char *base, *lname;
> >       int tid;
> >
> > -     if (sscanf(dso__long_name(dso), "/tmp/perf-%d.map", &tid) == 1) {
> > +     if (perf_pid_map_tid(dso__long_name(dso), &tid)) {
> >               if (asprintf(&base, "[JIT] tid %d", tid) < 0)
> >                       return;
> >       } else {
> > diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c
> > index 9d670d8c1c08..51eb78993fe2 100644
> > --- a/tools/perf/util/srcline.c
> > +++ b/tools/perf/util/srcline.c
> > @@ -39,7 +39,7 @@ static const char *srcline_dso_name(struct dso *dso)
> >       if (dso_name[0] == '[')
> >               return NULL;
> >
> > -     if (!strncmp(dso_name, "/tmp/perf-", 10))
> > +     if (is_perf_pid_map_name(dso_name))
> >               return NULL;
> >
> >       return dso_name;
>