From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 14/19] perf callchain: Fix double mapping al->addr for children without self period Date: Fri, 3 Nov 2017 10:54:58 -0300 Message-ID: <20171103135503.4921-15-acme@kernel.org> References: <20171103135503.4921-1-acme@kernel.org> Return-path: In-Reply-To: <20171103135503.4921-1-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, Namhyung Kim , Jin Yao , Jiri Olsa , kernel-team@lge.com, Arnaldo Carvalho de Melo List-Id: linux-perf-users.vger.kernel.org From: Namhyung Kim 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 Signed-off-by: Namhyung Kim Tested-by: Milian Wolff Cc: Jin Yao Cc: Jiri Olsa 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 --- tools/perf/util/callchain.c | 5 +---- 1 file changed, 1 insertion(+), 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) -- 2.13.6