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authorNamhyung Kim <namhyung@kernel.org>2017-10-20 08:15:33 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-10-31 22:14:50 +0300
commitd6332a176b869df1839abb26c8f80026a66d21d6 (patch)
tree9e01c349472558def29b2cc337f29e1410cb86a1 /tools
parent021b462a51de48dd84f12f5046b5b57a362d6506 (diff)
downloadlinux-d6332a176b869df1839abb26c8f80026a66d21d6.tar.xz
perf callchain: Fix double mapping al->addr for children without self period
Milian Wolff found a problem he described in [1] and that for him would get fixed: "Note how most of the large offset values are now gone. Most notably, we get proper srcline resolution for the random.h and complex headers." Then Namhyung found the root cause: "I looked into it and found a bug handling cumulative (children) entries. For children entries that have no self period, the al->addr (so he->ip) ends up having an doubly-mapped address. It seems to be there from the beginning but only affects entries that have no srclines - finding srcline itself is done using a different address but it will show the invalid address if no srcline was found. I think we should fix the commit c7405d85d7a3 ("perf tools: Update cpumode for each cumulative entry")." [1] https://lkml.kernel.org/r/20171018185350.14893-7-milian.wolff@kdab.com Reported-by: Milian Wolff <milian.wolff@kdab.com> Signed-off-by: Namhyung Kim <namhyung@kernel.org> Tested-by: Milian Wolff <milian.wolff@kdab.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: kernel-team@lge.com Fixes: c7405d85d7a3 ("perf tools: Update cpumode for each cumulative entry") Link: https://lkml.kernel.org/r/20171020051533.GA2746@sejong Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/callchain.c5
1 files changed, 1 insertions, 4 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index 3a3916934a92..837012147c7b 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -1091,10 +1091,7 @@ int fill_callchain_info(struct addr_location *al, struct callchain_cursor_node *
al->map = node->map;
al->sym = node->sym;
al->srcline = node->srcline;
- if (node->map)
- al->addr = node->map->map_ip(node->map, node->ip);
- else
- al->addr = node->ip;
+ al->addr = node->ip;
if (al->sym == NULL) {
if (hide_unresolved)