linux-kernel - [PATCH 04/13] perf script: Fix callchain addresses in db-export

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Date:	Wed, 11 May 2016 13:32:45 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	linux-kernel@...r.kernel.org, Chris Phlipot <cphlipot0@...il.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 04/13] perf script: Fix callchain addresses in db-export

From: Chris Phlipot <cphlipot0@...il.com>

Remove the call to map_ip() to adjust al.addr, because it has already
been called when assembling the callchain, in:

  thread__resolve_callchain_sample(perf_sample)
      add_callchain_ip(ip = perf_sample->callchain->ips[j])
          thread__find_addr_location(addr = ip)
              thread__find_addr_map(addr) {
                  al->addr = addr
                  if (al->map)
                      al->addr = al->map->map_ip(al->map, al->addr);
              }

Calling it a second time can result in incorrect addresses being used.
This can have effects such as duplicate symbols being created and
exported.

Signed-off-by: Chris Phlipot <cphlipot0@...il.com>
Cc: Adrian Hunter <adrian.hunter@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Link: http://lkml.kernel.org/r/1462937209-6032-4-git-send-email-cphlipot0@gmail.com
[ Show the callchain where it is done, to help reviewing this change down the line ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/util/db-export.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/tools/perf/util/db-export.c b/tools/perf/util/db-export.c
index 2ef1f692c35b..8ca4186bf31b 100644
--- a/tools/perf/util/db-export.c
+++ b/tools/perf/util/db-export.c
@@ -324,10 +324,7 @@ static struct call_path *call_path_from_sample(struct db_export *dbe,
 		al.sym = node->sym;
 		al.map = node->map;
 		al.machine = machine;
-		if (al.map)
-			al.addr = al.map->map_ip(al.map, node->ip);
-		else
-			al.addr = node->ip;
+		al.addr = node->ip;
 
 		db_ids_from_al(dbe, &al, &dso_db_id, &sym_db_id, &offset);
 
-- 
2.5.5