From: Ian Rogers <irogers@google.com>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: "Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Mark Rutland" <mark.rutland@arm.com>,
"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
"Jiri Olsa" <jolsa@kernel.org>,
"Namhyung Kim" <namhyung@kernel.org>,
"Nathan Chancellor" <nathan@kernel.org>,
"Nick Desaulniers" <ndesaulniers@google.com>,
"Tom Rix" <trix@redhat.com>,
"Roberto Sassu" <roberto.sassu@huawei.com>,
"Quentin Monnet" <quentin@isovalent.com>,
"Andres Freund" <andres@anarazel.de>,
"Tiezhu Yang" <yangtiezhu@loongson.cn>,
"Pavithra Gurushankar" <gpavithrasha@gmail.com>,
"Yang Jihong" <yangjihong1@huawei.com>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Leo Yan" <leo.yan@linaro.org>, "Martin Liška" <mliska@suse.cz>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
llvm@lists.linux.dev, "Stephane Eranian" <eranian@google.com>
Subject: Re: [PATCH v1 12/13] tools headers: Make the difference output easier to read
Date: Mon, 13 Mar 2023 13:14:50 -0700 [thread overview]
Message-ID: <CAP-5=fUZ0yLreTuB+G+f6cM=K5fb+AKyq3WLHa+B=O7_FZQfPw@mail.gmail.com> (raw)
In-Reply-To: <ZA97DiLTzFyFpKVE@kernel.org>
On Mon, Mar 13, 2023 at 12:35 PM Arnaldo Carvalho de Melo
<acme@kernel.org> wrote:
>
> Em Fri, Mar 10, 2023 at 10:57:52PM -0800, Ian Rogers escreveu:
> > Add failures to an array and display it before exiting. Before:
> >
> > ```
> > Warning: Kernel ABI header at 'tools/include/uapi/linux/fcntl.h' differs from latest version at 'include/uapi/linux/fcntl.h'
> > diff -u tools/include/uapi/linux/fcntl.h include/uapi/linux/fcntl.h
> > Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
> > diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
> > ...
> > ```
> >
> > After:
> > ```
> > Warning: Kernel ABI header differences:
> > tools/include/uapi/linux/fcntl.h include/uapi/linux/fcntl.h
> > tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
>
> I use that diff line to cut and paste, check the errors, etc.
>
> - Arnaldo
Sure, you can do something similar here but you need to add "diff -u"
at the beginning of the line. We could add a flag to the tool to do
the diff for you. The current 1st warning line is ~120characters long
and wraps onto 2 lines for me, the diff makes this 3 lines. Overall I
struggle to see the Makefile.config warnings because of all the
check-headers.sh warnings and the indent makes the grouping,
check-headers.sh vs other warnings/error, easier to see.
Compare the new output:
```
Warning: Kernel ABI header differences:
tools/include/uapi/linux/fcntl.h include/uapi/linux/fcntl.h
tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h
tools/include/uapi/linux/in.h include/uapi/linux/in.h
tools/include/uapi/linux/perf_event.h include/uapi/linux/perf_event.h
tools/include/uapi/linux/prctl.h include/uapi/linux/prctl.h
tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h
tools/include/linux/bits.h include/linux/bits.h
tools/include/vdso/bits.h include/vdso/bits.h
tools/arch/x86/include/asm/disabled-features.h
arch/x86/include/asm/disabled-features.h
tools/arch/x86/include/asm/required-features.h
arch/x86/include/asm/required-features.h
tools/arch/x86/include/asm/cpufeatures.h arch/x86/include/asm/cpufeatures.h
tools/arch/x86/include/asm/msr-index.h arch/x86/include/asm/msr-index.h
tools/arch/arm64/include/uapi/asm/perf_regs.h
arch/arm64/include/uapi/asm/perf_regs.h
tools/arch/x86/include/uapi/asm/kvm.h arch/x86/include/uapi/asm/kvm.h
tools/arch/x86/include/uapi/asm/svm.h arch/x86/include/uapi/asm/svm.h
tools/arch/arm64/include/uapi/asm/kvm.h arch/arm64/include/uapi/asm/kvm.h
tools/include/linux/coresight-pmu.h include/linux/coresight-pmu.h
tools/arch/x86/lib/memcpy_64.S arch/x86/lib/memcpy_64.S
tools/arch/x86/lib/memset_64.S arch/x86/lib/memset_64.S
Makefile.config:587: No sys/sdt.h found, no SDT events are defined,
please install systemtap-sdt-dev
el or systemtap-sdt-dev
Makefile.config:635: No libunwind found. Please install
libunwind-dev[el] >= 1.1 and/or set LIBUNWIN
D_DIR
Makefile.config:805: Missing perl devel files. Disabling perl
scripting support, please install perl
-ExtUtils-Embed/libperl-dev
Makefile.config:963: No libzstd found, disables trace compression,
please install libzstd-dev[el] an
d/or set LIBZSTD_DIR
Makefile.config:974: No libcap found, disables capability support,
please install libcap-devel/libca
p-dev
Makefile.config:987: No numa.h found, disables 'perf bench numa mem'
benchmark, please install numac
tl-devel/libnuma-devel/libnuma-dev
Makefile.config:1046: No libbabeltrace found, disables 'perf data' CTF
format support, please instal
l libbabeltrace-dev[el]/libbabeltrace-ctf-dev
Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
...
```
with
```
Warning: Kernel ABI header at 'tools/include/uapi/linux/in.h' differs
from latest version at 'includ
e/uapi/linux/in.h'
diff -u tools/include/uapi/linux/in.h include/uapi/linux/in.h
Warning: Kernel ABI header at
'tools/arch/x86/include/asm/cpufeatures.h' differs from latest version
at 'arch/x86/include/asm/cpufeatures.h'
diff -u tools/arch/x86/include/asm/cpufeatures.h
arch/x86/include/asm/cpufeatures.h
Warning: Kernel ABI header at
'tools/arch/arm64/include/uapi/asm/perf_regs.h' differs from latest ve
rsion at 'arch/arm64/include/uapi/asm/perf_regs.h'
diff -u tools/arch/arm64/include/uapi/asm/perf_regs.h
arch/arm64/include/uapi/asm/perf_regs.h
Warning: Kernel ABI header at 'tools/include/linux/coresight-pmu.h'
differs from latest version at '
include/linux/coresight-pmu.h'
diff -u tools/include/linux/coresight-pmu.h include/linux/coresight-pmu.h
Makefile.config:587: No sys/sdt.h found, no SDT events are defined,
please install systemtap-sdt-dev
el or systemtap-sdt-dev
Makefile.config:635: No libunwind found. Please install
libunwind-dev[el] >= 1.1 and/or set LIBUNWIN
D_DIR
Makefile.config:809: Missing perl devel files. Disabling perl
scripting support, please install perl
-ExtUtils-Embed/libperl-dev
Makefile.config:967: No libzstd found, disables trace compression,
please install libzstd-dev[el] an
d/or set LIBZSTD_DIR
Makefile.config:978: No libcap found, disables capability support,
please install libcap-devel/libca
p-dev
Makefile.config:991: No numa.h found, disables 'perf bench numa mem'
benchmark, please install numac
tl-devel/libnuma-devel/libnuma-dev
Makefile.config:1050: No libbabeltrace found, disables 'perf data' CTF
format support, please instal
l libbabeltrace-dev[el]/libbabeltrace-ctf-dev
Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
...
```
That said there are more warnings with the new code, which looks like
some of the filters have kept working as they should :-)
Thanks,
Ian
> > ...
> > ```
> >
> > Signed-off-by: Ian Rogers <irogers@google.com>
> > ---
> > tools/perf/check-headers.sh | 229 ++++++++++++++++++++----------------
> > 1 file changed, 125 insertions(+), 104 deletions(-)
> >
> > diff --git a/tools/perf/check-headers.sh b/tools/perf/check-headers.sh
> > index eacca9a874e2..f848b425d936 100755
> > --- a/tools/perf/check-headers.sh
> > +++ b/tools/perf/check-headers.sh
> > @@ -1,113 +1,121 @@
> > -#!/bin/sh
> > +#!/bin/bash
> > # SPDX-License-Identifier: GPL-2.0
> >
> > -FILES='
> > -include/uapi/linux/const.h
> > -include/uapi/drm/drm.h
> > -include/uapi/drm/i915_drm.h
> > -include/uapi/linux/fadvise.h
> > -include/uapi/linux/fcntl.h
> > -include/uapi/linux/fs.h
> > -include/uapi/linux/fscrypt.h
> > -include/uapi/linux/kcmp.h
> > -include/uapi/linux/kvm.h
> > -include/uapi/linux/in.h
> > -include/uapi/linux/mount.h
> > -include/uapi/linux/openat2.h
> > -include/uapi/linux/perf_event.h
> > -include/uapi/linux/prctl.h
> > -include/uapi/linux/sched.h
> > -include/uapi/linux/stat.h
> > -include/uapi/linux/usbdevice_fs.h
> > -include/uapi/linux/vhost.h
> > -include/uapi/sound/asound.h
> > -include/linux/bits.h
> > -include/vdso/bits.h
> > -include/linux/const.h
> > -include/vdso/const.h
> > -include/linux/hash.h
> > -include/linux/list-sort.h
> > -include/uapi/linux/hw_breakpoint.h
> > -arch/x86/include/asm/disabled-features.h
> > -arch/x86/include/asm/required-features.h
> > -arch/x86/include/asm/cpufeatures.h
> > -arch/x86/include/asm/inat_types.h
> > -arch/x86/include/asm/emulate_prefix.h
> > -arch/x86/include/asm/irq_vectors.h
> > -arch/x86/include/asm/msr-index.h
> > -arch/x86/include/uapi/asm/prctl.h
> > -arch/x86/lib/x86-opcode-map.txt
> > -arch/x86/tools/gen-insn-attr-x86.awk
> > -arch/arm/include/uapi/asm/perf_regs.h
> > -arch/arm64/include/uapi/asm/perf_regs.h
> > -arch/mips/include/uapi/asm/perf_regs.h
> > -arch/powerpc/include/uapi/asm/perf_regs.h
> > -arch/s390/include/uapi/asm/perf_regs.h
> > -arch/x86/include/uapi/asm/perf_regs.h
> > -arch/x86/include/uapi/asm/kvm.h
> > -arch/x86/include/uapi/asm/kvm_perf.h
> > -arch/x86/include/uapi/asm/svm.h
> > -arch/x86/include/uapi/asm/unistd.h
> > -arch/x86/include/uapi/asm/vmx.h
> > -arch/powerpc/include/uapi/asm/kvm.h
> > -arch/s390/include/uapi/asm/kvm.h
> > -arch/s390/include/uapi/asm/kvm_perf.h
> > -arch/s390/include/uapi/asm/ptrace.h
> > -arch/s390/include/uapi/asm/sie.h
> > -arch/arm/include/uapi/asm/kvm.h
> > -arch/arm64/include/uapi/asm/kvm.h
> > -arch/arm64/include/uapi/asm/unistd.h
> > -arch/alpha/include/uapi/asm/errno.h
> > -arch/mips/include/asm/errno.h
> > -arch/mips/include/uapi/asm/errno.h
> > -arch/parisc/include/uapi/asm/errno.h
> > -arch/powerpc/include/uapi/asm/errno.h
> > -arch/sparc/include/uapi/asm/errno.h
> > -arch/x86/include/uapi/asm/errno.h
> > -include/asm-generic/bitops/arch_hweight.h
> > -include/asm-generic/bitops/const_hweight.h
> > -include/asm-generic/bitops/__fls.h
> > -include/asm-generic/bitops/fls.h
> > -include/asm-generic/bitops/fls64.h
> > -include/linux/coresight-pmu.h
> > -include/uapi/asm-generic/errno.h
> > -include/uapi/asm-generic/errno-base.h
> > -include/uapi/asm-generic/ioctls.h
> > -include/uapi/asm-generic/mman-common.h
> > -include/uapi/asm-generic/unistd.h
> > -'
> > -
> > -SYNC_CHECK_FILES='
> > -arch/x86/include/asm/inat.h
> > -arch/x86/include/asm/insn.h
> > -arch/x86/lib/inat.c
> > -arch/x86/lib/insn.c
> > -'
> > +YELLOW='\033[0;33m'
> > +NC='\033[0m' # No Color
> > +
> > +declare -a FILES
> > +FILES=(
> > + "include/uapi/linux/const.h"
> > + "include/uapi/drm/drm.h"
> > + "include/uapi/drm/i915_drm.h"
> > + "include/uapi/linux/fadvise.h"
> > + "include/uapi/linux/fcntl.h"
> > + "include/uapi/linux/fs.h"
> > + "include/uapi/linux/fscrypt.h"
> > + "include/uapi/linux/kcmp.h"
> > + "include/uapi/linux/kvm.h"
> > + "include/uapi/linux/in.h"
> > + "include/uapi/linux/mount.h"
> > + "include/uapi/linux/openat2.h"
> > + "include/uapi/linux/perf_event.h"
> > + "include/uapi/linux/prctl.h"
> > + "include/uapi/linux/sched.h"
> > + "include/uapi/linux/stat.h"
> > + "include/uapi/linux/usbdevice_fs.h"
> > + "include/uapi/linux/vhost.h"
> > + "include/uapi/sound/asound.h"
> > + "include/linux/bits.h"
> > + "include/vdso/bits.h"
> > + "include/linux/const.h"
> > + "include/vdso/const.h"
> > + "include/linux/hash.h"
> > + "include/linux/list-sort.h"
> > + "include/uapi/linux/hw_breakpoint.h"
> > + "arch/x86/include/asm/disabled-features.h"
> > + "arch/x86/include/asm/required-features.h"
> > + "arch/x86/include/asm/cpufeatures.h"
> > + "arch/x86/include/asm/inat_types.h"
> > + "arch/x86/include/asm/emulate_prefix.h"
> > + "arch/x86/include/asm/irq_vectors.h"
> > + "arch/x86/include/asm/msr-index.h"
> > + "arch/x86/include/uapi/asm/prctl.h"
> > + "arch/x86/lib/x86-opcode-map.txt"
> > + "arch/x86/tools/gen-insn-attr-x86.awk"
> > + "arch/arm/include/uapi/asm/perf_regs.h"
> > + "arch/arm64/include/uapi/asm/perf_regs.h"
> > + "arch/mips/include/uapi/asm/perf_regs.h"
> > + "arch/powerpc/include/uapi/asm/perf_regs.h"
> > + "arch/s390/include/uapi/asm/perf_regs.h"
> > + "arch/x86/include/uapi/asm/perf_regs.h"
> > + "arch/x86/include/uapi/asm/kvm.h"
> > + "arch/x86/include/uapi/asm/kvm_perf.h"
> > + "arch/x86/include/uapi/asm/svm.h"
> > + "arch/x86/include/uapi/asm/unistd.h"
> > + "arch/x86/include/uapi/asm/vmx.h"
> > + "arch/powerpc/include/uapi/asm/kvm.h"
> > + "arch/s390/include/uapi/asm/kvm.h"
> > + "arch/s390/include/uapi/asm/kvm_perf.h"
> > + "arch/s390/include/uapi/asm/ptrace.h"
> > + "arch/s390/include/uapi/asm/sie.h"
> > + "arch/arm/include/uapi/asm/kvm.h"
> > + "arch/arm64/include/uapi/asm/kvm.h"
> > + "arch/arm64/include/uapi/asm/unistd.h"
> > + "arch/alpha/include/uapi/asm/errno.h"
> > + "arch/mips/include/asm/errno.h"
> > + "arch/mips/include/uapi/asm/errno.h"
> > + "arch/parisc/include/uapi/asm/errno.h"
> > + "arch/powerpc/include/uapi/asm/errno.h"
> > + "arch/sparc/include/uapi/asm/errno.h"
> > + "arch/x86/include/uapi/asm/errno.h"
> > + "include/asm-generic/bitops/arch_hweight.h"
> > + "include/asm-generic/bitops/const_hweight.h"
> > + "include/asm-generic/bitops/__fls.h"
> > + "include/asm-generic/bitops/fls.h"
> > + "include/asm-generic/bitops/fls64.h"
> > + "include/linux/coresight-pmu.h"
> > + "include/uapi/asm-generic/errno.h"
> > + "include/uapi/asm-generic/errno-base.h"
> > + "include/uapi/asm-generic/ioctls.h"
> > + "include/uapi/asm-generic/mman-common.h"
> > + "include/uapi/asm-generic/unistd.h"
> > +)
> > +
> > +declare -a SYNC_CHECK_FILES
> > +SYNC_CHECK_FILES=(
> > + "arch/x86/include/asm/inat.h"
> > + "arch/x86/include/asm/insn.h"
> > + "arch/x86/lib/inat.c"
> > + "arch/x86/lib/insn.c"
> > +)
> >
> > # These copies are under tools/perf/trace/beauty/ as they are not used to in
> > # building object files only by scripts in tools/perf/trace/beauty/ to generate
> > # tables that then gets included in .c files for things like id->string syscall
> > # tables (and the reverse lookup as well: string -> id)
> >
> > -BEAUTY_FILES='
> > -include/linux/socket.h
> > -'
> > +declare -a BEAUTY_FILES
> > +BEAUTY_FILES=(
> > + "include/linux/socket.h"
> > +)
> > +
> > +declare -a FAILURES
> >
> > check_2 () {
> > - file1=$1
> > - file2=$2
> > + tools_file=$1
> > + orig_file=$2
> >
> > shift
> > shift
> >
> > - cmd="diff $* $file1 $file2 > /dev/null"
> > + cmd="diff $* $tools_file $orig_file > /dev/null"
> >
> > - test -f $file2 && {
> > - eval $cmd || {
> > - echo "Warning: Kernel ABI header at '$file1' differs from latest version at '$file2'" >&2
> > - echo diff -u $file1 $file2
> > - }
> > - }
> > + if [ -f "$orig_file" ] && ! eval "$cmd"
> > + then
> > + FAILURES+=(
> > + "$tools_file $orig_file"
> > + )
> > + fi
> > }
> >
> > check () {
> > @@ -115,7 +123,7 @@ check () {
> >
> > shift
> >
> > - check_2 tools/$file $file $*
> > + check_2 "tools/$file" "$file" $*
> > }
> >
> > beauty_check () {
> > @@ -123,23 +131,29 @@ beauty_check () {
> >
> > shift
> >
> > - check_2 tools/perf/trace/beauty/$file $file $*
> > + check_2 "tools/perf/trace/beauty/$file" "$file" $*
> > }
> >
> > # Check if we have the kernel headers (tools/perf/../../include), else
> > # we're probably on a detached tarball, so no point in trying to check
> > # differences.
> > -test -d ../../include || exit 0
> > +if ! [ -d ../../include ]
> > +then
> > + echo -e "${YELLOW}Warning${NC}: Skipped check-headers due to missing ../../include"
> > + exit 0
> > +fi
> >
> > cd ../..
> >
> > # simple diff check
> > -for i in $FILES; do
> > - check $i -B
> > +for i in "${FILES[@]}"
> > +do
> > + check "$i" -B
> > done
> >
> > -for i in $SYNC_CHECK_FILES; do
> > - check $i '-I "^.*\/\*.*__ignore_sync_check__.*\*\/.*$"'
> > +for i in "${SYNC_CHECK_FILES[@]}"
> > +do
> > + check "$i" '-I "^.*\/\*.*__ignore_sync_check__.*\*\/.*$"'
> > done
> >
> > # diff with extra ignore lines
> > @@ -160,8 +174,9 @@ check_2 tools/perf/arch/powerpc/entry/syscalls/syscall.tbl arch/powerpc/kernel/s
> > check_2 tools/perf/arch/s390/entry/syscalls/syscall.tbl arch/s390/kernel/syscalls/syscall.tbl
> > check_2 tools/perf/arch/mips/entry/syscalls/syscall_n64.tbl arch/mips/kernel/syscalls/syscall_n64.tbl
> >
> > -for i in $BEAUTY_FILES; do
> > - beauty_check $i -B
> > +for i in "${BEAUTY_FILES[@]}"
> > +do
> > + beauty_check "$i" -B
> > done
> >
> > # check duplicated library files
> > @@ -169,3 +184,9 @@ check_2 tools/perf/util/hashmap.h tools/lib/bpf/hashmap.h
> > check_2 tools/perf/util/hashmap.c tools/lib/bpf/hashmap.c
> >
> > cd tools/perf
> > +
> > +echo -e "${YELLOW}Warning${NC}: Kernel ABI header differences:"
> > +for i in "${FAILURES[@]}"
> > +do
> > + echo " $i"
> > +done
> > --
> > 2.40.0.rc1.284.g88254d51c5-goog
> >
>
> --
>
> - Arnaldo
next prev parent reply other threads:[~2023-03-13 20:15 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-11 6:57 [PATCH v1 00/13] Perf tool build improvements Ian Rogers
2023-03-11 6:57 ` [PATCH v1 01/13] perf build: Support python/perf.so testing Ian Rogers
2023-03-11 6:57 ` [PATCH v1 02/13] perf build: Make BUILD_BPF_SKEL default, rename to NO_BPF_SKEL Ian Rogers
2023-03-13 20:19 ` Arnaldo Carvalho de Melo
2023-03-13 20:27 ` Ian Rogers
2023-03-13 20:34 ` Arnaldo Carvalho de Melo
2023-03-13 20:59 ` Arnaldo Carvalho de Melo
2023-03-13 21:05 ` Arnaldo Carvalho de Melo
2023-03-11 6:57 ` [PATCH v1 03/13] perf build: Remove unused HAVE_GLIBC_SUPPORT Ian Rogers
2023-03-11 6:57 ` [PATCH v1 04/13] perf build: Error if no libelf and NO_LIBELF isn't set Ian Rogers
2023-03-13 19:45 ` Arnaldo Carvalho de Melo
2023-03-13 20:18 ` Ian Rogers
2023-03-11 6:57 ` [PATCH v1 05/13] perf util: Remove weak sched_getcpu Ian Rogers
2023-03-11 6:57 ` [PATCH v1 06/13] perf build: Error if jevents won't work and NO_JEVENTS=1 isn't set Ian Rogers
2023-03-11 6:57 ` [PATCH v1 07/13] perf build: Make binutil libraries opt in Ian Rogers
2023-03-13 19:37 ` Arnaldo Carvalho de Melo
2023-03-11 6:57 ` [PATCH v1 08/13] tools build: Add feature test for abi::__cxa_demangle Ian Rogers
2023-03-11 6:57 ` [PATCH v1 09/13] perf symbol: Add abi::__cxa_demangle C++ demangling support Ian Rogers
2023-03-30 14:08 ` James Clark
2023-03-30 16:50 ` Ian Rogers
2023-03-30 19:03 ` Ian Rogers
2023-03-31 9:27 ` James Clark
2023-03-11 6:57 ` [PATCH v1 10/13] perf build: Switch libpfm4 to opt-out rather than opt-in Ian Rogers
2023-03-11 6:57 ` [PATCH v1 11/13] perf build: If libtraceevent isn't present error the build Ian Rogers
2023-03-11 6:57 ` [PATCH v1 12/13] tools headers: Make the difference output easier to read Ian Rogers
2023-03-13 19:35 ` Arnaldo Carvalho de Melo
2023-03-13 20:14 ` Ian Rogers [this message]
2023-03-11 6:57 ` [PATCH v1 13/13] perf build: Remove redundant NO_NEWT build option Ian Rogers
2023-03-14 12:11 ` [PATCH v1 00/13] Perf tool build improvements Arnaldo Carvalho de Melo
2023-03-14 12:12 ` Arnaldo Carvalho de Melo
2023-03-14 12:27 ` Arnaldo Carvalho de Melo
2023-03-14 12:29 ` Arnaldo Carvalho de Melo
2023-03-14 12:21 ` Adrian Hunter
2023-03-14 12:28 ` Arnaldo Carvalho de Melo
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