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perf trace: Fix read_string()

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We did not account for the enclosing \0. Depending on what malloc()
gave us this resulted in corrupted version string printouts.

Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2009-09-03 16:22:45 +02:00
parent 00fc97863c
commit 6f4596d931
1 changed files with 4 additions and 1 deletions
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5
tools/perf/util/trace-event-read.c
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@ -113,8 +113,11 @@ static char *read_string(void)
}
}
/* trailing \0: */
i++;
/* move the file descriptor to the end of the string */
r = lseek(input_fd, -(r - (i+1)), SEEK_CUR);
r = lseek(input_fd, -(r - i), SEEK_CUR);
if (r < 0)
die("lseek");