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Message-ID: <CA+icZUWasopVhZ449k1F8zG-C0kRbrt4tH+N7JqJO7CotA24Hw@mail.gmail.com>
Date: Mon, 1 Aug 2022 21:12:45 +0200
From: Sedat Dilek <sedat.dilek@...il.com>
To: Andres Freund <andres@...razel.de>
Cc: bpf@...r.kernel.org, linux-kernel@...r.kernel.org,
Alexei Starovoitov <ast@...nel.org>,
Arnaldo Carvalho de Melo <acme@...hat.com>,
Jiri Olsa <jolsa@...nel.org>,
Quentin Monnet <quentin@...valent.com>,
Ben Hutchings <benh@...ian.org>
Subject: Re: [PATCH v3 0/8] tools: fix compilation failure caused by
init_disassemble_info API changes
On Mon, Aug 1, 2022 at 3:38 AM Andres Freund <andres@...razel.de> wrote:
>
> binutils changed the signature of init_disassemble_info(), which now causes
> compilation failures for tools/{perf,bpf} on e.g. debian unstable. Relevant
> binutils commit:
> https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=60a3da00bd5407f07
>
> I first fixed this without introducing the compat header, as suggested by
> Quentin, but I thought the amount of repeated boilerplate was a bit too
> much. So instead I introduced a compat header to wrap the API changes. Even
> tools/bpf/bpftool/jit_disasm.c, which needs its own callbacks for json, imo
> looks nicer this way.
>
> I'm not regular contributor, so it very well might be my procedures are a
> bit off...
>
> I am not sure I added the right [number of] people to CC?
>
> WRT the feature test: Not sure what the point of the -DPACKAGE='"perf"' is,
> nor why tools/perf/Makefile.config sets some LDFLAGS/CFLAGS that are also
> in feature/Makefile and why -ldl isn't needed in the other places. But...
>
> V2:
> - split patches further, so that tools/bpf and tools/perf part are entirely
> separate
> - included a bit more information about tests I did in commit messages
> - add a maybe_unused to fprintf_json_styled's style argument
>
> V3:
> - don't include dis-asm-compat.h when building without libbfd
> (Ben Hutchings)
> - don't include compiler.h in dis-asm-compat.h, use (void) casts instead,
> to avoid compiler.h include due to potential licensing conflict
> - dual-license dis-asm-compat.h, for better compatibility with the rest of
> bpftool's code (suggested by Quentin Monnet)
> - don't display feature-disassembler-init-styled test
> (suggested by Jiri Olsa)
> - don't display feature-disassembler-four-args test, I split this for the
> different subsystems, but maybe that's overkill? (suggested by Jiri Olsa)
>
Hi Andres,
Just made a quick test & run with some custom patchset and LLVM-15 RC1:
[ REPRODUCER ]
LLVM_MVER="15"
##LLVM_TOOLCHAIN_PATH="/usr/lib/llvm-${LLVM_MVER}/bin"
LLVM_TOOLCHAIN_PATH="/opt/llvm/bin"
if [ -d ${LLVM_TOOLCHAIN_PATH} ]; then
export PATH="${LLVM_TOOLCHAIN_PATH}:${PATH}"
fi
PYTHON_VER="3.10"
MAKE="make"
MAKE_OPTS="V=1 -j1 HOSTCC=clang-$LLVM_MVER HOSTLD=ld.lld
HOSTAR=llvm-ar CC=clang-$LLVM_MVER LD=ld.lld AR=llvm-ar
STRIP=llvm-strip"
echo "LLVM MVER ........ $LLVM_MVER"
echo "Path settings .... $PATH"
echo "Python version ... $PYTHON_VER"
echo "make line ........ $MAKE $MAKE_OPTS"
LANG=C LC_ALL=C make -C tools/perf clean 2>&1 | tee ../make-log_perf-clean.txt
LANG=C LC_ALL=C $MAKE $MAKE_OPTS -C tools/perf
PYTHON=python${PYTHON_VER} install-bin 2>&1 | tee
../make-log_perf-install_bin_python${PYTHON_VER}_llvm${LLVM_MVER}.txt
Looks good.
$ ~/bin/perf -vv
perf version 5.19.0
dwarf: [ on ] # HAVE_DWARF_SUPPORT
dwarf_getlocations: [ on ] # HAVE_DWARF_GETLOCATIONS_SUPPORT
glibc: [ on ] # HAVE_GLIBC_SUPPORT
syscall_table: [ on ] # HAVE_SYSCALL_TABLE_SUPPORT
libbfd: [ on ] # HAVE_LIBBFD_SUPPORT
debuginfod: [ OFF ] # HAVE_DEBUGINFOD_SUPPORT
libelf: [ on ] # HAVE_LIBELF_SUPPORT
libnuma: [ on ] # HAVE_LIBNUMA_SUPPORT
numa_num_possible_cpus: [ on ] # HAVE_LIBNUMA_SUPPORT
libperl: [ on ] # HAVE_LIBPERL_SUPPORT
libpython: [ on ] # HAVE_LIBPYTHON_SUPPORT
libslang: [ on ] # HAVE_SLANG_SUPPORT
libcrypto: [ on ] # HAVE_LIBCRYPTO_SUPPORT
libunwind: [ on ] # HAVE_LIBUNWIND_SUPPORT
libdw-dwarf-unwind: [ on ] # HAVE_DWARF_SUPPORT
zlib: [ on ] # HAVE_ZLIB_SUPPORT
lzma: [ on ] # HAVE_LZMA_SUPPORT
get_cpuid: [ on ] # HAVE_AUXTRACE_SUPPORT
bpf: [ on ] # HAVE_LIBBPF_SUPPORT
aio: [ on ] # HAVE_AIO_SUPPORT
zstd: [ on ] # HAVE_ZSTD_SUPPORT
libpfm4: [ OFF ] # HAVE_LIBPFM
[ Test on Intel Sandybridge CPU ]
$ echo 0 | sudo tee /proc/sys/kernel/kptr_restrict
/proc/sys/kernel/perf_event_paranoid
0
$ ~/bin/perf test 10 93 94 95
10: PMU events :
10.1: PMU event table sanity : Ok
10.2: PMU event map aliases : Ok
10.3: Parsing of PMU event table metrics : Ok
10.4: Parsing of PMU event table metrics with fake PMUs : Ok
93: perf all metricgroups test : Ok
94: perf all metrics test : Ok
95: perf all PMU test : Ok
Feel free to add my:
Tested-by: Sedat Dilek <sedat.dilek@...il.com> # LLVM v15.0.0-rc1 (x86-64)
Regards,
-Sedat-
> Cc: Alexei Starovoitov <ast@...nel.org>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Sedat Dilek <sedat.dilek@...il.com>
> Cc: Quentin Monnet <quentin@...valent.com>
> CC: Ben Hutchings <benh@...ian.org>
> Cc: bpf@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> Link: https://lore.kernel.org/lkml/20220622181918.ykrs5rsnmx3og4sv@alap3.anarazel.de
> Link: https://lore.kernel.org/lkml/CA+icZUVpr8ZeOKCj4zMMqbFT013KJz2T1csvXg+VSkdvJH1Ubw@mail.gmail.com
>
> Andres Freund (8):
> tools build: Add feature test for init_disassemble_info API changes
> tools build: Don't display disassembler-four-args feature test
> tools include: add dis-asm-compat.h to handle version differences
> tools perf: Fix compilation error with new binutils
> tools bpf_jit_disasm: Fix compilation error with new binutils
> tools bpf_jit_disasm: Don't display disassembler-four-args feature
> test
> tools bpftool: Fix compilation error with new binutils
> tools bpftool: Don't display disassembler-four-args feature test
>
> tools/bpf/Makefile | 7 ++-
> tools/bpf/bpf_jit_disasm.c | 5 +-
> tools/bpf/bpftool/Makefile | 8 ++-
> tools/bpf/bpftool/jit_disasm.c | 42 +++++++++++---
> tools/build/Makefile.feature | 4 +-
> tools/build/feature/Makefile | 4 ++
> tools/build/feature/test-all.c | 4 ++
> .../feature/test-disassembler-init-styled.c | 13 +++++
> tools/include/tools/dis-asm-compat.h | 55 +++++++++++++++++++
> tools/perf/Makefile.config | 8 +++
> tools/perf/util/annotate.c | 7 ++-
> 11 files changed, 138 insertions(+), 19 deletions(-)
> create mode 100644 tools/build/feature/test-disassembler-init-styled.c
> create mode 100644 tools/include/tools/dis-asm-compat.h
>
> --
> 2.37.0.3.g30cc8d0f14
>
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