Messages in this thread | | | Date | Wed, 19 Oct 2011 16:38:48 -0200 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH] perf top: fix crash on annotate request |
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Em Wed, Oct 19, 2011 at 12:23:18PM -0600, David Ahern escreveu: > Hitting an annotate case where src is not set and > perf-top crashes.
How did you got there? Navigating thru callq? I wonder if in this case we'd instead shouldn't call
symbol__alloc_hist(sym, evlist->nr_entries)
And proceed, only complaining on ENOMEM, like we do in parse_source in builtin-top.c.
I.e. if the user asked to go to a function without hits, no problem, allocate the data structures needed for doing the annotation and show 0 hits on all lines.
- Arnaldo
> Signed-off-by: David Ahern <dsahern@gmail.com> > --- > tools/perf/util/annotate.c | 3 +++ > tools/perf/util/ui/browsers/annotate.c | 2 ++ > 2 files changed, 5 insertions(+), 0 deletions(-) > > diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c > index bc8f477..26652b1 100644 > --- a/tools/perf/util/annotate.c > +++ b/tools/perf/util/annotate.c > @@ -205,6 +205,9 @@ static int symbol__parse_objdump_line(struct symbol *sym, struct map *map, > size_t line_len; > s64 line_ip, offset = -1; > > + if (!notes->src) > + return -1; > + > if (getline(&line, &line_len, file) < 0) > return -1; > > diff --git a/tools/perf/util/ui/browsers/annotate.c b/tools/perf/util/ui/browsers/annotate.c > index a2c351c..5a67ead 100644 > --- a/tools/perf/util/ui/browsers/annotate.c > +++ b/tools/perf/util/ui/browsers/annotate.c > @@ -410,6 +410,8 @@ int symbol__tui_annotate(struct symbol *sym, struct map *map, int evidx, > ui_helpline__push("Press <- or ESC to exit"); > > notes = symbol__annotation(sym); > + if (!notes->src) > + return -1; > > list_for_each_entry(pos, ¬es->src->source, node) { > struct objdump_line_rb_node *rbpos; > -- > 1.7.6.4
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