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perf probe: Fix mis-estimation for shortening filename

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Fix mis-estimation size for making a short filename.
Since the buffer size is 32 bytes and there are '@' prefix and
'\0' termination, maximum shorten filename length should be
30. This means, before searching '/', it should be 31 bytes.

LKML-Reference: <20100414223935.14630.11954.stgit@localhost6.localdomain6>
Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Masami Hiramatsu 2010-04-14 18:39:35 -04:00 committed by Arnaldo Carvalho de Melo
parent 7ca5989dd0
commit dd259c5db2
1 changed files with 2 additions and 2 deletions
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4
tools/perf/util/probe-event.c
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@ -806,12 +806,12 @@ static char *synthesize_perf_probe_point(struct perf_probe_point *pp)
goto error;
}
if (pp->file) {
len = strlen(pp->file) - 32;
len = strlen(pp->file) - 31;
if (len < 0)
len = 0;
tmp = strchr(pp->file + len, '/');
if (!tmp)
tmp = pp->file + len - 1;
tmp = pp->file + len;
ret = e_snprintf(file, 32, "@%s", tmp + 1);
if (ret <= 0)
goto error;