Messages in this thread | | | Date | Thu, 18 May 2017 18:55:38 +0900 | From | Namhyung Kim <> | Subject | Re: [PATCH v2] perf report: do not drop last inlined frame |
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On Thu, May 18, 2017 at 10:38:22AM +0200, Milian Wolff wrote: > 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: > 21493 __hypot_finite (/usr/lib/libm-2.25.so) > a4a std::abs<double> (inline) (/tmp/a.out) > a4a std::_Norm_helper<true>::_S_do_it<double> (inline) (/tmp/a.out) > a4a std::norm<double> (inline) (/tmp/a.out) > a4a main (/tmp/a.out) > 20510 __libc_start_main (/usr/lib/libc-2.25.so) > bd9 _start (/tmp/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<double>(std::complex<double> const&) > /usr/include/c++/6.3.1/complex:597 > double std::_Norm_helper<true>::_S_do_it<double>(std::complex<double> const&) > /usr/include/c++/6.3.1/complex:654 > double std::norm<double>(std::complex<double> 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: > 21493 __hypot_finite (/usr/lib/libm-2.25.so) > ace3 hypot (/usr/lib/libm-2.25.so)
Why is the 'hypot' missing in the above perf script output? Is it another problem?
Thanks, Namhyung
> a4a std::__complex_abs (inline) (/tmp/a.out) > a4a std::abs<double> (inline) (/tmp/a.out) > a4a std::_Norm_helper<true>::_S_do_it<double> (inline) (/tmp/a.out) > a4a std::norm<double> (inline) (/tmp/a.out) > a4a main (/tmp/a.out) > 20510 __libc_start_main (/usr/lib/libc-2.25.so) > bd9 _start (/tmp/a.out) > ~~~~~ > > Cc: Arnaldo Carvalho de Melo <acme@redhat.com> > Cc: David Ahern <dsahern@gmail.com> > Cc: Namhyung Kim <namhyung@kernel.org> > Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> > Cc: Yao Jin <yao.jin@linux.intel.com> > Signed-off-by: Milian Wolff <milian.wolff@kdab.com> > --- > tools/perf/util/srcline.c | 18 ++++++++++++++---- > 1 file changed, 14 insertions(+), 4 deletions(-) > > v2: > - rebase against patch fixing memleak in addr2lines > > diff --git a/tools/perf/util/srcline.c b/tools/perf/util/srcline.c > index bbba9c69cfec..168285d37cd2 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 >
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