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authorRavi Bangoria <ravi.bangoria@linux.vnet.ibm.com>2017-10-05 12:12:34 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-10-05 16:52:54 +0300
commitc1fbc0cf81f1c464f5fda322c1104d4bb1da6711 (patch)
tree06b54ec9f8dee12c4f25efe4306335e9047ebdb9 /tools/perf/util/callchain.c
parent1addcd55bc54d669000221b41e379458ff3e6747 (diff)
downloadlinux-c1fbc0cf81f1c464f5fda322c1104d4bb1da6711.tar.xz
perf callchain: Compare dsos (as well) for CCKEY_FUNCTION
Two functions from different binaries can have same start address. Thus, comparing only start address in match_chain() leads to inconsistent callchains. Fix this by adding a check for dsos as well. Ex, https://www.spinics.net/lists/linux-perf-users/msg04067.html Reported-by: Alexander Pozdneev <pozdneyev@gmail.com> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Krister Johansen <kjlx@templeofstupid.com> Cc: Milian Wolff <milian.wolff@kdab.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yao Jin <yao.jin@linux.intel.com> Cc: zhangmengting@huawei.com Link: http://lkml.kernel.org/r/20171005091234.5874-1-ravi.bangoria@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/callchain.c')
-rw-r--r--tools/perf/util/callchain.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index be09d77cade0..a971caf3759d 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -685,6 +685,8 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
{
struct symbol *sym = node->sym;
u64 left, right;
+ struct dso *left_dso = NULL;
+ struct dso *right_dso = NULL;
if (callchain_param.key == CCKEY_SRCLINE) {
enum match_result match = match_chain_srcline(node, cnode);
@@ -696,12 +698,14 @@ static enum match_result match_chain(struct callchain_cursor_node *node,
if (cnode->ms.sym && sym && callchain_param.key == CCKEY_FUNCTION) {
left = cnode->ms.sym->start;
right = sym->start;
+ left_dso = cnode->ms.map->dso;
+ right_dso = node->map->dso;
} else {
left = cnode->ip;
right = node->ip;
}
- if (left == right) {
+ if (left == right && left_dso == right_dso) {
if (node->branch) {
cnode->branch_count++;