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perf report: Fix sort__sym_cmp to also compare end of symbol 

When using a map file from a JIT, due to memory reuse, we can obtain
multiple symbols with the same start address but a different length.

The symbols__find does check for the end so not doing it in
sort__sym_cmp was causing the hist_entry in the annotate part of a
report to match to the wrong entry, causing a fatal error.

Signed-off-by: Yannick Brosseau <scientist@fb.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@fb.com
Link: http://lkml.kernel.org/r/1434584470-17771-1-git-send-email-scientist@fb.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Yannick Brosseau 2015-06-17 16:41:10 -07:00 committed by Arnaldo Carvalho de Melo
parent 3e323dc0a8
commit c05676c062
1 changed files with 3 additions and 5 deletions
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8
tools/perf/util/sort.c
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@ -182,18 +182,16 @@ static int64_t _sort__addr_cmp(u64 left_ip, u64 right_ip)
static int64_t _sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r)
{
u64 ip_l, ip_r;
if (!sym_l || !sym_r)
return cmp_null(sym_l, sym_r);
if (sym_l == sym_r)
return 0;
ip_l = sym_l->start;
ip_r = sym_r->start;
if (sym_l->start != sym_r->start)
return (int64_t)(sym_r->start - sym_l->start);
return (int64_t)(ip_r - ip_l);
return (int64_t)(sym_r->end - sym_l->end);
}
static int64_t