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| author | David Ahern <dsahern@gmail.com> | 2012-02-24 12:31:38 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2012-02-29 18:29:45 -0300 |
| commit | cfbd70c17c4535e64be92ea442a2a45078a18184 (patch) | |
| tree | 4c78934457516617938fe62100cb5f4a230874cb | |
| parent | 26b7952494772f0e695271fbd6cf83a852f60f25 (diff) | |
| download | linux-cfbd70c17c4535e64be92ea442a2a45078a18184.tar.bz2 | |
perf tools: Ensure comm string is properly terminated
If threads in a multi-threaded process have names shorter than the main
thread the comm for the named threads is not properly terminated.
E.g., for the process 'namedthreads' where each thread is named noploop%d
where %d is the thread number:
Before:
perf script -f comm,tid,ip,sym,dso
noploop:4ads 21616 400a49 noploop (/tmp/namedthreads)
The 'ads' in the thread comm bleeds over from the process name.
After:
perf script -f comm,tid,ip,sym,dso
noploop:4 21616 400a49 noploop (/tmp/namedthreads)
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1330111898-68071-1-git-send-email-dsahern@gmail.com
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
| -rw-r--r-- | tools/perf/util/event.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/perf/util/event.c b/tools/perf/util/event.c index 2044324b755a..2a6f33cd888c 100644 --- a/tools/perf/util/event.c +++ b/tools/perf/util/event.c @@ -74,6 +74,7 @@ static pid_t perf_event__get_comm_tgid(pid_t pid, char *comm, size_t len) if (size >= len) size = len - 1; memcpy(comm, name, size); + comm[size] = '\0'; } else if (memcmp(bf, "Tgid:", 5) == 0) { char *tgids = bf + 5; |