Re: [PATCH v5 00/17] Reference count checker and related fixes

[Arnaldo Carvalho de Melo <acme@kernel.org>]

Em Tue, Apr 04, 2023 at 02:02:36PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Apr 04, 2023 at 08:58:55AM -0700, Ian Rogers escreveu:
> > Ping. It would be nice to have this landed or at least the first 10
> > patches that refactor the map API and are the bulk of the
> > lines-of-code changed. Having those landed would make it easier to
> > rebase in the future, but I also think the whole series is ready to
> > go.
> 
> I'm trying to get it to compile:
> 
>   CC      /tmp/build/perf-tools-next/util/bpf-event.o
> In file included from util/machine.h:7,
>                  from util/session.h:8,
>                  from util/unwind-libunwind-local.c:35:
> util/unwind-libunwind-local.c: In function ‘read_unwind_spec_eh_frame’:
> util/maps.h:29:18: error: assignment to ‘struct map *’ from incompatible pointer type ‘struct map_rb_node *’ [-Werror=incompatible-pointer-types]
>    29 |         for (map = maps__first(maps); map; map = map_rb_node__next(map))
>       |                  ^
> util/unwind-libunwind-local.c:328:9: note: in expansion of macro ‘maps__for_each_entry’
> 
> ⬢[acme@toolbox perf-tools-next]$ git log --oneline -1
> 51a0f26e88c893ac (HEAD) perf maps: Remove rb_node from struct map
> ⬢[acme@toolbox perf-tools-next]$
> 
> I'm also making some changes to reduce the number of patch lines and
> conserve the project 'git blame' usefulness, not changing the logic in
> your patches.

The fix for the above problem demonstrate the changes I made to this
patch, see the

  struct map *map = map_node->map;

Line, to avoid touching the logic right after it.

Now I'm working on this other error:

  CC      /tmp/build/perf-tools-next/util/jitdump.o
  CC      /tmp/build/perf-tools-next/util/bpf-event.o
util/unwind-libunwind.c: In function ‘unwind__get_entries’:
util/unwind-libunwind.c:95:24: error: too few arguments to function ‘ops->get_entries’
   95 |                 return ops->get_entries(cb, arg, thread, data, max_stack);
      |                        ^~~
util/unwind-libunwind.c:90:31: error: unused parameter ‘best_effort’ [-Werror=unused-parameter]
   90 |                          bool best_effort)
      |                               ^
cc1: all warnings being treated as errors
make[4]: *** [/var/home/acme/git/perf-tools-next/tools/build/Makefile.build:97: /tmp/build/perf-tools-next/util/unwind-libunwind.o] Error 1
make[4]: *** Waiting for unfinished jobs....
  LD      /tmp/build/perf-tools-next/ui/browsers/perf-in.o
  LD      /tmp/build/perf-tools-next/ui/perf-in.o
  LD      /tmp/build/perf-tools-next/util/scripting-engines/perf-in.o
make[3]: *** [/var/home/acme/git/perf-tools-next/tools/build/Makefile.build:140: util] Error 2
make[2]: *** [Makefile.perf:676: /tmp/build/perf-tools-next/perf-in.o] Error 2
make[1]: *** [Makefile.perf:236: sub-make] Error 2
make: *** [Makefile:113: install-bin] Error 2
make: Leaving directory '/var/home/acme/git/perf-tools-next/tools/perf'

 Performance counter stats for 'make -k BUILD_BPF_SKEL=1 CORESIGHT=1 PYTHON=python3 O=/tmp/build/perf-tools-next -C tools/perf install-bin':

      162599516548      cycles:u
      194726899066      instructions:u                   #    1.20  insn per cycle

       4.991056085 seconds time elapsed

      39.350659000 seconds user
       8.413527000 seconds sys


⬢[acme@toolbox perf-tools-next]$ git log --oneline -1
a95f2d0f62bfd750 (HEAD) perf maps: Add functions to access maps
⬢[acme@toolbox perf-tools-next]$

- Arnaldo