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perf symbols: Handle NULL dso in dso__name_len 

We should use "[unknown]" in this case, in concert with the code in
_hist_entry__dso_snprintf().

Otherwise we'll crash when recomputing the histogram column lengths in
hists__calc_col_len().

Signed-off-by: David S. Miller <davem@davemloft.net>
Link: http://lkml.kernel.org/r/20120325.162822.2267799792062571623.davem@davemloft.net
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
David Miller 2012-03-25 16:28:22 -04:00 committed by Arnaldo Carvalho de Melo
parent 3738d40ec5
commit 1e2dd2f73a
1 changed files with 2 additions and 0 deletions
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2
tools/perf/util/symbol.c
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@ -50,6 +50,8 @@ struct symbol_conf symbol_conf = {
int dso__name_len(const struct dso *dso) int dso__name_len(const struct dso *dso)
{ {
if (!dso)
return strlen("[unknown]");
if (verbose) if (verbose)
return dso->long_name_len; return dso->long_name_len;