linux-kernel - [PATCH 2/6] perf annotate: Check if offset is less than symbol size

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Date:	Wed, 16 Feb 2011 20:54:43 -0200
From:	Arnaldo Carvalho de Melo <acme@...radead.org>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Tom Zanussi <tzanussi@...il.com>
Subject: [PATCH 2/6] perf annotate: Check if offset is less than symbol size

From: Arnaldo Carvalho de Melo <acme@...hat.com>

Just like done on symbol__inc_addr_samples to catch misparsed offsets
from objdump.

Cc: Frederic Weisbecker <fweisbec@...il.com>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Mike Galbraith <efault@....de>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Tom Zanussi <tzanussi@...il.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/annotate.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 02976b8..70ec422 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -541,11 +541,12 @@ void symbol__annotate_decay_histogram(struct symbol *sym, int evidx)
 	struct annotation *notes = symbol__annotation(sym);
 	struct sym_hist *h = annotation__histogram(notes, evidx);
 	struct objdump_line *pos;
+	int len = sym->end - sym->start;
 
 	h->sum = 0;
 
 	list_for_each_entry(pos, &notes->src->source, node) {
-		if (pos->offset != -1) {
+		if (pos->offset != -1 && pos->offset < len) {
 			h->addr[pos->offset] = h->addr[pos->offset] * 7 / 8;
 			h->sum += h->addr[pos->offset];
 		}
-- 
1.6.2.5

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