From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938460AbdEXGWm (ORCPT ); Wed, 24 May 2017 02:22:42 -0400 Received: from LGEAMRELO12.lge.com ([156.147.23.52]:34891 "EHLO lgeamrelo12.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S938385AbdEXGVi (ORCPT ); Wed, 24 May 2017 02:21:38 -0400 X-Original-SENDERIP: 156.147.1.127 X-Original-MAILFROM: namhyung@kernel.org X-Original-SENDERIP: 10.177.227.17 X-Original-MAILFROM: namhyung@kernel.org From: Namhyung Kim To: Ingo Molnar Cc: LKML , kernel-team@lge.com, Arnaldo Carvalho de Melo , Jiri Olsa , Milian Wolff , Yao Jin , Arnaldo Carvalho de Melo , David Ahern , Peter Zijlstra Subject: [PATCH 6/7] perf report: do not drop last inlined frame Date: Wed, 24 May 2017 15:21:28 +0900 Message-Id: <20170524062129.32529-7-namhyung@kernel.org> X-Mailer: git-send-email 2.13.0 In-Reply-To: <20170524062129.32529-1-namhyung@kernel.org> References: <20170524062129.32529-1-namhyung@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Milian Wolff The very last inlined frame, i.e. the one furthest away from the non-inlined frame, was silently dropped. This is apparent when comparing the output of `perf script` and `addr2line`: ~~~~~~ $ perf script --inline ... a.out 26722 80836.309329: 72425 cycles: 21561 __hypot_finite (/usr/lib/libm-2.25.so) ace3 hypot (/usr/lib/libm-2.25.so) a4a main (a.out) std::abs std::_Norm_helper::_S_do_it std::norm main 20510 __libc_start_main (/usr/lib/libc-2.25.so) bd9 _start (a.out) $ addr2line -a -f -i -e /tmp/a.out a4a | c++filt 0x0000000000000a4a std::__complex_abs(doublecomplex ) /usr/include/c++/6.3.1/complex:589 double std::abs(std::complex const&) /usr/include/c++/6.3.1/complex:597 double std::_Norm_helper::_S_do_it(std::complex const&) /usr/include/c++/6.3.1/complex:654 double std::norm(std::complex const&) /usr/include/c++/6.3.1/complex:664 main /tmp/inlining.cpp:14 ~~~~~ Note how `std::__complex_abs` is missing from the `perf script` output. This is similarly showing up in `perf report`. The patch here fixes this issue, and the output becomes: ~~~~~ a.out 26722 80836.309329: 72425 cycles: 21561 __hypot_finite (/usr/lib/libm-2.25.so) ace3 hypot (/usr/lib/libm-2.25.so) a4a main (a.out) std::__complex_abs std::abs std::_Norm_helper::_S_do_it std::norm main 20510 __libc_start_main (/usr/lib/libc-2.25.so) bd9 _start (a.out) ~~~~~ Cc: Arnaldo Carvalho de Melo Cc: David Ahern Cc: Peter Zijlstra Cc: Yao Jin Signed-off-by: Milian Wolff Signed-off-by: Namhyung Kim --- tools/perf/util/srcline.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c index 6af0364cad06..ebc88a74e67b 100644 --- a/tools/perf/util/srcline.c +++ b/tools/perf/util/srcline.c @@ -203,6 +203,16 @@ static void addr2line_cleanup(struct a2l_data *a2l) #define MAX_INLINE_NEST 1024 +static int inline_list__append_dso_a2l(struct dso *dso, + struct inline_node *node) +{ + struct a2l_data *a2l = dso->a2l; + char *funcname = a2l->funcname ? strdup(a2l->funcname) : NULL; + char *filename = a2l->filename ? strdup(a2l->filename) : NULL; + + return inline_list__append(filename, funcname, a2l->line, node, dso); +} + static int addr2line(const char *dso_name, u64 addr, char **file, unsigned int *line, struct dso *dso, bool unwind_inlines, struct inline_node *node) @@ -231,15 +241,15 @@ static int addr2line(const char *dso_name, u64 addr, if (unwind_inlines) { int cnt = 0; + if (node && inline_list__append_dso_a2l(dso, node)) + return 0; + while (bfd_find_inliner_info(a2l->abfd, &a2l->filename, &a2l->funcname, &a2l->line) && cnt++ < MAX_INLINE_NEST) { if (node != NULL) { - if (inline_list__append(strdup(a2l->filename), - strdup(a2l->funcname), - a2l->line, node, - dso) != 0) + if (inline_list__append_dso_a2l(dso, node)) return 0; // found at least one inline frame ret = 1; -- 2.13.0