Commit c05676c0 authored Jun 17, 2015 by Yannick Brosseau Committed by Arnaldo Carvalho de Melo Jun 19, 2015

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>

parent 3e323dc0

tools/perf/util/sort.c

+3 −5

Original line number	Diff line number	Diff line
		@@ -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