AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

perf script: Fix callchain addresses in db-export

Browse Source 
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@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <peterz@infradead.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@redhat.com>
This commit is contained in:
Chris Phlipot 2016-05-10 20:26:48 -07:00 committed by Arnaldo Carvalho de Melo
parent bd0a51dd27
commit 7a2544c004
1 changed files with 1 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
tools/perf/util/db-export.c
View File

@ -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);