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perf record: Fix filemap pathname parsing in /proc/pid/maps

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Looking backward for the first space from the end of a line in
/proc/pid/maps does not find the start of the pathname of the mapped
file if it contains a space.

Since the only slashes we have in this file occur in the (absolute!)
pathname column of file mappings, looking for the first slash in a
line is a safe method to find the name.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Stefani Seibold <stefani@seibold.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20090624190835.GA25548@cmpxchg.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Johannes Weiner 2009-06-24 21:08:36 +02:00 committed by Ingo Molnar
parent 1b173f77dd
commit 76c64c5e4c
1 changed files with 2 additions and 3 deletions
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5
tools/perf/builtin-record.c
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@ -306,12 +306,11 @@ static void pid_synthesize_mmap_samples(pid_t pid)
continue;
pbf += n + 3;
if (*pbf == 'x') { /* vm_exec */
char *execname = strrchr(bf, ' ');
char *execname = strchr(bf, '/');
if (execname == NULL || execname[1] != '/')
if (execname == NULL)
continue;
execname += 1;
size = strlen(execname);
execname[size - 1] = '\0'; /* Remove \n */
memcpy(mmap_ev.filename, execname, size);