From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 1/1] perf callchain: Compare dsos (as well) for CCKEY_FUNCTION Date: Thu, 5 Oct 2017 14:59:13 -0300 Message-ID: <20171005175913.16513-2-acme@kernel.org> References: <20171005175913.16513-1-acme@kernel.org> Return-path: In-Reply-To: <20171005175913.16513-1-acme@kernel.org> Sender: linux-kernel-owner@vger.kernel.org To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Ravi Bangoria , Alexander Shishkin , Andi Kleen , Krister Johansen , Milian Wolff , Namhyung Kim , Peter Zijlstra , Yao Jin , zhangmengting@huawei.com, Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Ravi Bangoria 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 Signed-off-by: Ravi Bangoria Acked-by: Jiri Olsa Cc: Alexander Shishkin Cc: Andi Kleen Cc: Krister Johansen Cc: Milian Wolff Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Yao Jin 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 --- tools/perf/util/callchain.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) 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++; -- 2.13.6