From: Namhyung Kim <namhyung@kernel.org>
To: Ian Rogers <irogers@google.com>
Cc: "Peter Zijlstra" <peterz@infradead.org>,
"Ingo Molnar" <mingo@redhat.com>,
"Arnaldo Carvalho de Melo" <acme@kernel.org>,
"Mark Rutland" <mark.rutland@arm.com>,
"Alexander Shishkin" <alexander.shishkin@linux.intel.com>,
"Jiri Olsa" <jolsa@kernel.org>,
"Adrian Hunter" <adrian.hunter@intel.com>,
"Kan Liang" <kan.liang@linux.intel.com>,
"John Garry" <john.g.garry@oracle.com>,
"Will Deacon" <will@kernel.org>,
"James Clark" <james.clark@linaro.org>,
"Mike Leach" <mike.leach@linaro.org>,
"Leo Yan" <leo.yan@linux.dev>, guoren <guoren@kernel.org>,
"Paul Walmsley" <paul.walmsley@sifive.com>,
"Palmer Dabbelt" <palmer@dabbelt.com>,
"Albert Ou" <aou@eecs.berkeley.edu>,
"Charlie Jenkins" <charlie@rivosinc.com>,
"Bibo Mao" <maobibo@loongson.cn>,
"Huacai Chen" <chenhuacai@kernel.org>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Jiri Slaby" <jirislaby@kernel.org>,
"Björn Töpel" <bjorn@rivosinc.com>,
"Howard Chu" <howardchu95@gmail.com>,
linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
"linux-csky@vger.kernel.org" <linux-csky@vger.kernel.org>,
linux-riscv@lists.infradead.org, "Arnd Bergmann" <arnd@arndb.de>
Subject: Re: [PATCH v7 00/14] perf: Support multiple system call tables in the build
Date: Thu, 20 Mar 2025 16:59:17 -0700 [thread overview]
Message-ID: <Z9yr1dnrX0DgDHgn@google.com> (raw)
In-Reply-To: <20250319050741.269828-1-irogers@google.com>
On Tue, Mar 18, 2025 at 10:07:27PM -0700, Ian Rogers wrote:
> This work builds on the clean up of system call tables and removal of
> libaudit by Charlie Jenkins <charlie@rivosinc.com>.
>
> The system call table in perf trace is used to map system call numbers
> to names and vice versa. Prior to these changes, a single table
> matching the perf binary's build was present. The table would be
> incorrect if tracing say a 32-bit binary from a 64-bit version of
> perf, the names and numbers wouldn't match.
>
> Change the build so that a single system call file is built and the
> potentially multiple tables are identifiable from the ELF machine type
> of the process being examined. To determine the ELF machine type, the
> executable's maps are searched and the associated DSOs ELF headers are
> read. When this fails and when live, /proc/pid/exe's ELF header is
> read. Fallback to using the perf's binary type when unknown.
>
> Remove some runtime types used by the system call tables and make
> equivalents generated at build time.
>
> v7: Rebase for dso data locking changes. Don't NULL check before
> btf__free (Arnaldo). Add patch to clean up perf trace's evlist to
> make leak sanitizer happier.
>
> v6: Incorporate Namhyung's fixes:
> https://lore.kernel.org/lkml/Z9PCjQ8PhOadVGQ8@google.com/
> https://lore.kernel.org/lkml/Z9YHCzINiu4uBQ8B@google.com/
> Which highlighted an issue with syscall pointers becoming
> stale. Add a patch 12 to make the syscall table a table of
> pointers that don't move so that struct syscalls don't move. Add a
> patch 13 fixing a BTF memory leak.
>
> v5: Add byte swap to dso__e_machine and fix comment as suggested by
> Namhyung.
>
> v4: Add reading the e_machine from the thread's maps dsos, only read
> from /proc/pid/exe on failure and when live as requested by
> Namhyung. Add patches to add dso comments and remove unused
> dso_data variables that are unused without libunwind.
>
> v3: Add Charlie's reviewed-by tags. Incorporate feedback from Arnd
> Bergmann <arnd@arndb.de> on additional optional column and MIPS
> system call numbering. Rebase past Namhyung's global system call
> statistics and add comments that they don't yet support an
> e_machine other than EM_HOST.
>
> v2: Change the 1 element cache for the last table as suggested by
> Howard Chu, add Howard's reviewed-by tags.
> Add a comment and apology to Charlie for not doing better in
> guiding:
> https://lore.kernel.org/all/20250114-perf_syscall_arch_runtime-v1-1-5b304e408e11@rivosinc.com/
> After discussion on v1 and he agreed this patch series would be
> the better direction.
>
> Ian Rogers (14):
> perf dso: Move libunwind dso_data variables into ifdef
> perf dso: kernel-doc for enum dso_binary_type
> perf syscalltbl: Remove syscall_table.h
> perf trace: Reorganize syscalls
> perf syscalltbl: Remove struct syscalltbl
> perf dso: Add support for reading the e_machine type for a dso
> perf thread: Add support for reading the e_machine type for a thread
> perf trace beauty: Add syscalltbl.sh generating all system call tables
> perf syscalltbl: Use lookup table containing multiple architectures
> perf build: Remove Makefile.syscalls
> perf syscalltbl: Mask off ABI type for MIPS system calls
> perf trace: Make syscall table stable
> perf trace: Fix BTF memory leak
> perf trace: Fix evlist memory leak
Reviewed-by: Namhyung Kim <namhyung@kernel.org>
Thanks,
Namhyung
>
> tools/perf/Makefile.perf | 10 +-
> tools/perf/arch/alpha/entry/syscalls/Kbuild | 2 -
> .../alpha/entry/syscalls/Makefile.syscalls | 5 -
> tools/perf/arch/alpha/include/syscall_table.h | 2 -
> tools/perf/arch/arc/entry/syscalls/Kbuild | 2 -
> .../arch/arc/entry/syscalls/Makefile.syscalls | 3 -
> tools/perf/arch/arc/include/syscall_table.h | 2 -
> tools/perf/arch/arm/entry/syscalls/Kbuild | 4 -
> .../arch/arm/entry/syscalls/Makefile.syscalls | 2 -
> tools/perf/arch/arm/include/syscall_table.h | 2 -
> tools/perf/arch/arm64/entry/syscalls/Kbuild | 3 -
> .../arm64/entry/syscalls/Makefile.syscalls | 6 -
> tools/perf/arch/arm64/include/syscall_table.h | 8 -
> tools/perf/arch/csky/entry/syscalls/Kbuild | 2 -
> .../csky/entry/syscalls/Makefile.syscalls | 3 -
> tools/perf/arch/csky/include/syscall_table.h | 2 -
> .../perf/arch/loongarch/entry/syscalls/Kbuild | 2 -
> .../entry/syscalls/Makefile.syscalls | 3 -
> .../arch/loongarch/include/syscall_table.h | 2 -
> tools/perf/arch/mips/entry/syscalls/Kbuild | 2 -
> .../mips/entry/syscalls/Makefile.syscalls | 5 -
> tools/perf/arch/mips/include/syscall_table.h | 2 -
> tools/perf/arch/parisc/entry/syscalls/Kbuild | 3 -
> .../parisc/entry/syscalls/Makefile.syscalls | 6 -
> .../perf/arch/parisc/include/syscall_table.h | 8 -
> tools/perf/arch/powerpc/entry/syscalls/Kbuild | 3 -
> .../powerpc/entry/syscalls/Makefile.syscalls | 6 -
> .../perf/arch/powerpc/include/syscall_table.h | 8 -
> tools/perf/arch/riscv/entry/syscalls/Kbuild | 2 -
> .../riscv/entry/syscalls/Makefile.syscalls | 4 -
> tools/perf/arch/riscv/include/syscall_table.h | 8 -
> tools/perf/arch/s390/entry/syscalls/Kbuild | 2 -
> .../s390/entry/syscalls/Makefile.syscalls | 5 -
> tools/perf/arch/s390/include/syscall_table.h | 2 -
> tools/perf/arch/sh/entry/syscalls/Kbuild | 2 -
> .../arch/sh/entry/syscalls/Makefile.syscalls | 4 -
> tools/perf/arch/sh/include/syscall_table.h | 2 -
> tools/perf/arch/sparc/entry/syscalls/Kbuild | 3 -
> .../sparc/entry/syscalls/Makefile.syscalls | 5 -
> tools/perf/arch/sparc/include/syscall_table.h | 8 -
> tools/perf/arch/x86/entry/syscalls/Kbuild | 3 -
> .../arch/x86/entry/syscalls/Makefile.syscalls | 6 -
> tools/perf/arch/x86/include/syscall_table.h | 8 -
> tools/perf/arch/xtensa/entry/syscalls/Kbuild | 2 -
> .../xtensa/entry/syscalls/Makefile.syscalls | 4 -
> .../perf/arch/xtensa/include/syscall_table.h | 2 -
> tools/perf/builtin-trace.c | 339 ++++++++++++------
> tools/perf/scripts/Makefile.syscalls | 61 ----
> tools/perf/scripts/syscalltbl.sh | 86 -----
> tools/perf/trace/beauty/syscalltbl.sh | 274 ++++++++++++++
> tools/perf/util/dso.c | 89 +++++
> tools/perf/util/dso.h | 62 ++++
> tools/perf/util/symbol-elf.c | 27 --
> tools/perf/util/syscalltbl.c | 148 ++++----
> tools/perf/util/syscalltbl.h | 22 +-
> tools/perf/util/thread.c | 80 +++++
> tools/perf/util/thread.h | 14 +-
> 57 files changed, 839 insertions(+), 543 deletions(-)
> delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/alpha/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/alpha/include/syscall_table.h
> delete mode 100644 tools/perf/arch/arc/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/arc/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/arc/include/syscall_table.h
> delete mode 100644 tools/perf/arch/arm/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/arm/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/arm/include/syscall_table.h
> delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/arm64/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/arm64/include/syscall_table.h
> delete mode 100644 tools/perf/arch/csky/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/csky/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/csky/include/syscall_table.h
> delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/loongarch/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/loongarch/include/syscall_table.h
> delete mode 100644 tools/perf/arch/mips/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/mips/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/mips/include/syscall_table.h
> delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/parisc/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/parisc/include/syscall_table.h
> delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/powerpc/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/powerpc/include/syscall_table.h
> delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/riscv/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/riscv/include/syscall_table.h
> delete mode 100644 tools/perf/arch/s390/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/s390/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/s390/include/syscall_table.h
> delete mode 100644 tools/perf/arch/sh/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/sh/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/sh/include/syscall_table.h
> delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/sparc/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/sparc/include/syscall_table.h
> delete mode 100644 tools/perf/arch/x86/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/x86/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/x86/include/syscall_table.h
> delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Kbuild
> delete mode 100644 tools/perf/arch/xtensa/entry/syscalls/Makefile.syscalls
> delete mode 100644 tools/perf/arch/xtensa/include/syscall_table.h
> delete mode 100644 tools/perf/scripts/Makefile.syscalls
> delete mode 100755 tools/perf/scripts/syscalltbl.sh
> create mode 100755 tools/perf/trace/beauty/syscalltbl.sh
>
> --
> 2.49.0.rc1.451.g8f38331e32-goog
>
next prev parent reply other threads:[~2025-03-20 23:59 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-19 5:07 [PATCH v7 00/14] perf: Support multiple system call tables in the build Ian Rogers
2025-03-19 5:07 ` [PATCH v7 01/14] perf dso: Move libunwind dso_data variables into ifdef Ian Rogers
2025-03-19 5:07 ` [PATCH v7 02/14] perf dso: kernel-doc for enum dso_binary_type Ian Rogers
2025-03-19 5:07 ` [PATCH v7 03/14] perf syscalltbl: Remove syscall_table.h Ian Rogers
2025-03-19 5:07 ` [PATCH v7 04/14] perf trace: Reorganize syscalls Ian Rogers
2025-03-19 5:07 ` [PATCH v7 05/14] perf syscalltbl: Remove struct syscalltbl Ian Rogers
2025-03-19 5:07 ` [PATCH v7 06/14] perf dso: Add support for reading the e_machine type for a dso Ian Rogers
2025-03-19 5:07 ` [PATCH v7 07/14] perf thread: Add support for reading the e_machine type for a thread Ian Rogers
2025-03-19 5:07 ` [PATCH v7 08/14] perf trace beauty: Add syscalltbl.sh generating all system call tables Ian Rogers
2025-03-19 5:07 ` [PATCH v7 09/14] perf syscalltbl: Use lookup table containing multiple architectures Ian Rogers
2025-03-19 5:07 ` [PATCH v7 10/14] perf build: Remove Makefile.syscalls Ian Rogers
2025-03-19 5:07 ` [PATCH v7 11/14] perf syscalltbl: Mask off ABI type for MIPS system calls Ian Rogers
2025-03-19 5:07 ` [PATCH v7 12/14] perf trace: Make syscall table stable Ian Rogers
2025-03-19 5:07 ` [PATCH v7 13/14] perf trace: Fix BTF memory leak Ian Rogers
2025-03-19 5:07 ` [PATCH v7 14/14] perf trace: Fix evlist " Ian Rogers
2025-03-20 23:59 ` Namhyung Kim [this message]
2025-03-21 18:30 ` [PATCH v7 00/14] perf: Support multiple system call tables in the build Namhyung Kim
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