linux-kernel - Re: [PATCH] perf tools: handle spaces in file names obtained from /proc/pid/maps

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Message-ID: <20160107231600.GA21372@marcin-Inspiron-7720>
Date:	Fri, 8 Jan 2016 00:16:00 +0100
From:	Marcin Ślusarz <marcin.slusarz@...il.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: Re: [PATCH] perf tools: handle spaces in file names obtained from
 /proc/pid/maps

On Mon, Jan 04, 2016 at 10:25:28AM +0900, Namhyung Kim wrote:
> Hi Marcin,
> 
> On Fri, Jan 01, 2016 at 04:03:21AM +0100, Marcin Ślusarz wrote:
> > Steam frequently puts game binaries in folders with spaces.
> > 
> > Note: "(deleted)" markers are now treated as part of the file name.
> > 
> > It probably worked before 6064803313bad9ae4cae233a9d56678adb2b6e7c
> > ("perf tools: Use sscanf for parsing /proc/pid/maps").
> > 
> > Signed-off-by: Marcin Ślusarz <marcin.slusarz@...il.com>
> > Cc: Namhyung Kim <namhyung@...nel.org>
> > Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> > ---
> >  tools/perf/util/event.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
> > index 8b10621..ff17fe6 100644
> > --- a/tools/perf/util/event.c
> > +++ b/tools/perf/util/event.c
> > @@ -274,7 +274,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
> >  		strcpy(execname, "");
> >  
> >  		/* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
> > -		n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
> > +		n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]s\n",
> 
> Is the last 's' necessary?

Nope. It should not be there.

---
From: Marcin Ślusarz <marcin.slusarz@...il.com>
Subject: [PATCH v2] perf tools: handle spaces in file names obtained from /proc/pid/maps

Steam frequently puts game binaries in folders with spaces.

Note: "(deleted)" markers are now treated as part of the file name.

It probably worked before 6064803313bad9ae4cae233a9d56678adb2b6e7c
("perf tools: Use sscanf for parsing /proc/pid/maps").

Signed-off-by: Marcin Ślusarz <marcin.slusarz@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/event.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c
index 8b10621..956187b 100644
--- a/tools/perf/util/event.c
+++ b/tools/perf/util/event.c
@@ -274,7 +274,7 @@ int perf_event__synthesize_mmap_events(struct perf_tool *tool,
 		strcpy(execname, "");
 
 		/* 00400000-0040c000 r-xp 00000000 fd:01 41038  /bin/cat */
-		n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %s\n",
+		n = sscanf(bf, "%"PRIx64"-%"PRIx64" %s %"PRIx64" %x:%x %u %[^\n]\n",
 		       &event->mmap2.start, &event->mmap2.len, prot,
 		       &event->mmap2.pgoff, &event->mmap2.maj,
 		       &event->mmap2.min,
-- 
2.1.4