linux-kernel - [PATCH v2 0/6] Use rustc-demangle for Rust demangling

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Message-ID: <20250430004128.474388-1-irogers@google.com>
Date: Tue, 29 Apr 2025 17:41:22 -0700
From: Ian Rogers <irogers@...gle.com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, 
	Arnaldo Carvalho de Melo <acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, 
	Mark Rutland <mark.rutland@....com>, 
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>, Jiri Olsa <jolsa@...nel.org>, 
	Adrian Hunter <adrian.hunter@...el.com>, Kan Liang <kan.liang@...ux.intel.com>, 
	Miguel Ojeda <ojeda@...nel.org>, Alex Gaynor <alex.gaynor@...il.com>, 
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>, 
	"Björn Roy Baron" <bjorn3_gh@...tonmail.com>, Benno Lossin <benno.lossin@...ton.me>, 
	Andreas Hindborg <a.hindborg@...nel.org>, Alice Ryhl <aliceryhl@...gle.com>, 
	Trevor Gross <tmgross@...ch.edu>, Danilo Krummrich <dakr@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Nick Desaulniers <nick.desaulniers+lkml@...il.com>, 
	Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>, 
	James Clark <james.clark@...aro.org>, Howard Chu <howardchu95@...il.com>, 
	Jiapeng Chong <jiapeng.chong@...ux.alibaba.com>, Ravi Bangoria <ravi.bangoria@....com>, 
	"Masami Hiramatsu (Google)" <mhiramat@...nel.org>, Stephen Brennan <stephen.s.brennan@...cle.com>, 
	linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org, 
	rust-for-linux@...r.kernel.org, llvm@...ts.linux.dev, 
	Daniel Xu <dxu@...uu.xyz>, Ariel Ben-Yehuda <ariel.byd@...il.com>
Cc: Ian Rogers <irogers@...gle.com>
Subject: [PATCH v2 0/6] Use rustc-demangle for Rust demangling

Discussion of improved Rust demangling started with:
https://lore.kernel.org/lkml/jgxfnphfo3nzlfipnuuzdlfc4ehbr2tnh2evz3mdhynd6wvrsu@fcz6vrvepybb/
that led to implementing a Rust v0 demangler:
https://lore.kernel.org/lkml/20250129193037.573431-1-irogers@google.com/
Discussion on that patch series led to the rust-lang issue:
https://github.com/rust-lang/rust/issues/60705
where the pre-existing Rust C demangler, authored by Ariel Ben-Yehuda
 <ariel.byd@...il.com>, was mentioned. There wasn't progress on that
issue and so I've pulled that work into perf as discussed on the
issue.

v2: Changes to references from arielb1 to "Ariel Ben Yehuda
    <ariel.byd@...il.com>", license tidying as suggested by Miguel
    Ojeda" <ojeda@...nel.org>. Don't change from alternate demangling
    flag from false to true in the test change, make it true from the
    beginning (patch 2).

Ian Rogers (6):
  perf demangle-rust: Add rustc-demangle C demangler
  perf symbol-elf: Integrate rust-v0 demangling
  perf demangle-rust: Remove previous legacy rust decoder
  perf test demangle-rust: Add Rust demangling test
  perf test demangle-java: Switch to using dso__demangle_sym
  perf test demangle-ocaml: Switch to using dso__demangle_sym

 tools/perf/tests/Build                   |    1 +
 tools/perf/tests/builtin-test.c          |    1 +
 tools/perf/tests/demangle-java-test.c    |   17 +-
 tools/perf/tests/demangle-ocaml-test.c   |    7 +-
 tools/perf/tests/demangle-rust-v0-test.c |   74 +
 tools/perf/tests/tests.h                 |    1 +
 tools/perf/util/Build                    |    5 +-
 tools/perf/util/demangle-rust-v0.c       | 2042 ++++++++++++++++++++++
 tools/perf/util/demangle-rust-v0.h       |   88 +
 tools/perf/util/demangle-rust.c          |  269 ---
 tools/perf/util/demangle-rust.h          |    8 -
 tools/perf/util/symbol-elf.c             |   49 +-
 12 files changed, 2257 insertions(+), 305 deletions(-)
 create mode 100644 tools/perf/tests/demangle-rust-v0-test.c
 create mode 100644 tools/perf/util/demangle-rust-v0.c
 create mode 100644 tools/perf/util/demangle-rust-v0.h
 delete mode 100644 tools/perf/util/demangle-rust.c
 delete mode 100644 tools/perf/util/demangle-rust.h

-- 
2.49.0.901.g37484f566f-goog