* Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization
2011-04-29 8:41 ` [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization Lin Ming
@ 2011-04-29 9:44 ` Ingo Molnar
2011-04-29 13:18 ` Lin Ming
2011-04-29 17:33 ` Arnaldo Carvalho de Melo
2011-05-10 20:13 ` [tip:perf/core] " tip-bot for Lin Ming
2 siblings, 1 reply; 9+ messages in thread
From: Ingo Molnar @ 2011-04-29 9:44 UTC (permalink / raw)
To: Lin Ming; +Cc: Arnaldo Carvalho de Melo, linux-kernel
* Lin Ming <ming.m.lin@intel.com> wrote:
> pubname_callback_param::found should be initialized to 0 in fastpath lookup.
>
> Signed-off-by: Lin Ming <ming.m.lin@intel.com>
> ---
> tools/perf/util/probe-finder.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> index a7c7145..3b9d0b8 100644
> --- a/tools/perf/util/probe-finder.c
> +++ b/tools/perf/util/probe-finder.c
> @@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
> .file = pp->file,
> .cu_die = &pf->cu_die,
> .sp_die = &pf->sp_die,
> + .found = 0,
Hm, why is this a 'misc cleanup'? If this field is uninitialized (it does
appear so) and we rely on the field then right now this is a bug and the fix
should be pushed to perf/urgent.
Thanks,
Ingo
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization
2011-04-29 9:44 ` Ingo Molnar
@ 2011-04-29 13:18 ` Lin Ming
0 siblings, 0 replies; 9+ messages in thread
From: Lin Ming @ 2011-04-29 13:18 UTC (permalink / raw)
To: Ingo Molnar; +Cc: Arnaldo Carvalho de Melo, linux-kernel
On Fri, 2011-04-29 at 17:44 +0800, Ingo Molnar wrote:
> * Lin Ming <ming.m.lin@intel.com> wrote:
>
> > pubname_callback_param::found should be initialized to 0 in fastpath lookup.
> >
> > Signed-off-by: Lin Ming <ming.m.lin@intel.com>
> > ---
> > tools/perf/util/probe-finder.c | 1 +
> > 1 files changed, 1 insertions(+), 0 deletions(-)
> >
> > diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> > index a7c7145..3b9d0b8 100644
> > --- a/tools/perf/util/probe-finder.c
> > +++ b/tools/perf/util/probe-finder.c
> > @@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
> > .file = pp->file,
> > .cu_die = &pf->cu_die,
> > .sp_die = &pf->sp_die,
> > + .found = 0,
>
> Hm, why is this a 'misc cleanup'? If this field is uninitialized (it does
I should call it 'misc cleanup and fix'.
> appear so) and we rely on the field then right now this is a bug and the fix
> should be pushed to perf/urgent.
Indeed.
>
> Thanks,
>
> Ingo
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization
2011-04-29 8:41 ` [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization Lin Ming
2011-04-29 9:44 ` Ingo Molnar
@ 2011-04-29 17:33 ` Arnaldo Carvalho de Melo
2011-04-30 4:14 ` Lin Ming
2011-05-10 20:13 ` [tip:perf/core] " tip-bot for Lin Ming
2 siblings, 1 reply; 9+ messages in thread
From: Arnaldo Carvalho de Melo @ 2011-04-29 17:33 UTC (permalink / raw)
To: Lin Ming; +Cc: linux-kernel
Em Fri, Apr 29, 2011 at 08:41:57AM +0000, Lin Ming escreveu:
> pubname_callback_param::found should be initialized to 0 in fastpath lookup.
Is this really needed? Or is this just to stress it, for documentational
purposes?
> Signed-off-by: Lin Ming <ming.m.lin@intel.com>
> ---
> tools/perf/util/probe-finder.c | 1 +
> 1 files changed, 1 insertions(+), 0 deletions(-)
>
> diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> index a7c7145..3b9d0b8 100644
> --- a/tools/perf/util/probe-finder.c
> +++ b/tools/perf/util/probe-finder.c
> @@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
> .file = pp->file,
> .cu_die = &pf->cu_die,
> .sp_die = &pf->sp_die,
> + .found = 0,
> };
> struct dwarf_callback_param probe_param = {
> .data = pf,
> --
> 1.7.4.4
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization
2011-04-29 17:33 ` Arnaldo Carvalho de Melo
@ 2011-04-30 4:14 ` Lin Ming
2011-05-10 13:43 ` Lin Ming
0 siblings, 1 reply; 9+ messages in thread
From: Lin Ming @ 2011-04-30 4:14 UTC (permalink / raw)
To: Arnaldo Carvalho de Melo; +Cc: linux-kernel
On Sat, 2011-04-30 at 01:33 +0800, Arnaldo Carvalho de Melo wrote:
> Em Fri, Apr 29, 2011 at 08:41:57AM +0000, Lin Ming escreveu:
> > pubname_callback_param::found should be initialized to 0 in fastpath lookup.
>
>
> Is this really needed? Or is this just to stress it, for documentational
> purposes?
Yes, this is really needed.
It should be initialized to 0, and pubname_search_cb will set it to 1 if
the function is found.
>
> > Signed-off-by: Lin Ming <ming.m.lin@intel.com>
> > ---
> > tools/perf/util/probe-finder.c | 1 +
> > 1 files changed, 1 insertions(+), 0 deletions(-)
> >
> > diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
> > index a7c7145..3b9d0b8 100644
> > --- a/tools/perf/util/probe-finder.c
> > +++ b/tools/perf/util/probe-finder.c
> > @@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
> > .file = pp->file,
> > .cu_die = &pf->cu_die,
> > .sp_die = &pf->sp_die,
> > + .found = 0,
> > };
> > struct dwarf_callback_param probe_param = {
> > .data = pf,
> > --
> > 1.7.4.4
^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization
2011-04-30 4:14 ` Lin Ming
@ 2011-05-10 13:43 ` Lin Ming
0 siblings, 0 replies; 9+ messages in thread
From: Lin Ming @ 2011-05-10 13:43 UTC (permalink / raw)
To: Lin Ming; +Cc: Arnaldo Carvalho de Melo, linux-kernel
On Sat, Apr 30, 2011 at 12:14 PM, Lin Ming <ming.m.lin@intel.com> wrote:
> On Sat, 2011-04-30 at 01:33 +0800, Arnaldo Carvalho de Melo wrote:
>> Em Fri, Apr 29, 2011 at 08:41:57AM +0000, Lin Ming escreveu:
>> > pubname_callback_param::found should be initialized to 0 in fastpath lookup.
>>
>>
>> Is this really needed? Or is this just to stress it, for documentational
>> purposes?
>
> Yes, this is really needed.
>
> It should be initialized to 0, and pubname_search_cb will set it to 1 if
> the function is found.
ping ...
--
Lin Ming -- Intel Open Source Technology Center
^ permalink raw reply [flat|nested] 9+ messages in thread
* [tip:perf/core] perf probe: Fix the missed parameter initialization
2011-04-29 8:41 ` [RESEND PATCH 1/2] perf probe: Fix the missed parameter initialization Lin Ming
2011-04-29 9:44 ` Ingo Molnar
2011-04-29 17:33 ` Arnaldo Carvalho de Melo
@ 2011-05-10 20:13 ` tip-bot for Lin Ming
2 siblings, 0 replies; 9+ messages in thread
From: tip-bot for Lin Ming @ 2011-05-10 20:13 UTC (permalink / raw)
To: linux-tip-commits; +Cc: linux-kernel, hpa, mingo, acme, ming.m.lin, tglx, mingo
Commit-ID: 2b348a77981227c6b64fb9cf19f7c711a6806bc9
Gitweb: http://git.kernel.org/tip/2b348a77981227c6b64fb9cf19f7c711a6806bc9
Author: Lin Ming <ming.m.lin@intel.com>
AuthorDate: Fri, 29 Apr 2011 08:41:57 +0000
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 10 May 2011 17:06:23 +0200
perf probe: Fix the missed parameter initialization
pubname_callback_param::found should be initialized to 0 in
fastpath lookup, the structure is on the stack and
uninitialized otherwise.
Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Link: http://lkml.kernel.org/r/1304066518-30420-2-git-send-email-ming.m.lin@intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/util/probe-finder.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index a7c7145..3b9d0b8 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -1538,6 +1538,7 @@ static int find_probes(int fd, struct probe_finder *pf)
.file = pp->file,
.cu_die = &pf->cu_die,
.sp_die = &pf->sp_die,
+ .found = 0,
};
struct dwarf_callback_param probe_param = {
.data = pf,
^ permalink raw reply related [flat|nested] 9+ messages in thread