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AJvYcCWRPPA2y7gwOJ4e8t3PbLMiFRN7oqNXmKNaFdLbihnjQ8XkmJnrNKcp3PJ0BRpSUi2AaV532su3XJdHgSM=@vger.kernel.org X-Gm-Message-State: AOJu0Yw+UxCU10Gqye6E5NsW5q7TA78jbwBMAwHfmxKybEjN05l1cWnN OIzX5SjpDKFSzecLX/FiyyE91dEOkc+qCwwzTGnXp0TcZXDnNjkZ8KwUJI7DIptRgkvOf7EhphZ DgZh5ew== X-Google-Smtp-Source: AGHT+IEgShAFHftTTVxbrvVcDqE2v6HQyys2Tjgrus0Ml4unFOZkCNqcLxKiT5FKmZLOfryZx2Mt7AWcMLto X-Received: from pjbdj11.prod.google.com ([2002:a17:90a:d2cb:b0:2ff:6e58:8a0a]) (user=irogers job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:55c7:b0:2ee:e113:815d with SMTP id 98e67ed59e1d1-30a332ee938mr337025a91.8.1745953156249; Tue, 29 Apr 2025 11:59:16 -0700 (PDT) Date: Tue, 29 Apr 2025 11:58:36 -0700 In-Reply-To: <20250429185839.1807005-1-irogers@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250429185839.1807005-1-irogers@google.com> X-Mailer: git-send-email 2.49.0.901.g37484f566f-goog Message-ID: <20250429185839.1807005-5-irogers@google.com> Subject: [PATCH v1 4/6] perf test demangle-rust: Add Rust demangling test From: Ian Rogers To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , "=?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?=" , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , James Clark , Howard Chu , Jiapeng Chong , Ravi Bangoria , "Masami Hiramatsu (Google)" , Stephen Brennan , linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, rust-for-linux@vger.kernel.org, llvm@lists.linux.dev, Daniel Xu Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The test cases are listed examples in: https://doc.rust-lang.org/rustc/symbol-mangling/v0.html This test was previously part of a different Rust v0 demangler: https://lore.kernel.org/lkml/20250129193037.573431-1-irogers@google.com/ Signed-off-by: Ian Rogers --- tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test.c | 1 + tools/perf/tests/demangle-rust-v0-test.c | 74 ++++++++++++++++++++++++ tools/perf/tests/tests.h | 1 + tools/perf/util/symbol-elf.c | 4 +- 5 files changed, 79 insertions(+), 2 deletions(-) create mode 100644 tools/perf/tests/demangle-rust-v0-test.c diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index 934f32090553..2181f5a92148 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -56,6 +56,7 @@ perf-test-y +=3D genelf.o perf-test-y +=3D api-io.o perf-test-y +=3D demangle-java-test.o perf-test-y +=3D demangle-ocaml-test.o +perf-test-y +=3D demangle-rust-v0-test.o perf-test-y +=3D pfm.o perf-test-y +=3D parse-metric.o perf-test-y +=3D pe-file-parsing.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-tes= t.c index 14d30a5053be..45d3d8b3317a 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -126,6 +126,7 @@ static struct test_suite *generic_tests[] =3D { &suite__maps__merge_in, &suite__demangle_java, &suite__demangle_ocaml, + &suite__demangle_rust, &suite__parse_metric, &suite__pe_file_parsing, &suite__expand_cgroup_events, diff --git a/tools/perf/tests/demangle-rust-v0-test.c b/tools/perf/tests/de= mangle-rust-v0-test.c new file mode 100644 index 000000000000..efbc0fc25ffc --- /dev/null +++ b/tools/perf/tests/demangle-rust-v0-test.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "tests.h" +#include "debug.h" +#include "symbol.h" +#include +#include +#include + +static int test__demangle_rust(struct test_suite *test __maybe_unused, int= subtest __maybe_unused) +{ + int ret =3D TEST_OK; + char *buf =3D NULL; + size_t i; + + struct { + const char *mangled, *demangled; + } test_cases[] =3D { + { "_RNvMsr_NtCs3ssYzQotkvD_3std4pathNtB5_7PathBuf3newCs15kBYyAo9fc_7mycr= ate", + "::new" }, + { "_RNvCs15kBYyAo9fc_7mycrate7example", + "mycrate::example" }, + { "_RNvMs_Cs4Cv8Wi1oAIB_7mycrateNtB4_7Example3foo", + "::foo" }, + { "_RNvXCs15kBYyAo9fc_7mycrateNtB2_7ExampleNtB2_5Trait3foo", + "::foo" }, + { "_RNvMCs7qp2U7fqm6G_7mycrateNtB2_7Example3foo", + "::foo" }, + { "_RNvMs_Cs7qp2U7fqm6G_7mycrateNtB4_7Example3bar", + "::bar" }, + { "_RNvYNtCs15kBYyAo9fc_7mycrate7ExampleNtB4_5Trait7exampleB4_", + "::example" }, + { "_RNCNvCsgStHSCytQ6I_7mycrate4main0B3_", + "mycrate::main::{closure#0}" }, + { "_RNCNvCsgStHSCytQ6I_7mycrate4mains_0B3_", + "mycrate::main::{closure#1}" }, + { "_RINvCsgStHSCytQ6I_7mycrate7examplelKj1_EB2_", + "mycrate::example::" }, + { "_RINvCs7qp2U7fqm6G_7mycrate7exampleFG0_RL1_hRL0_tEuEB2_", + "mycrate::example:: fn(&'a u8, &'b u16)>", + }, + { "_RINvCs7qp2U7fqm6G_7mycrate7exampleKy12345678_EB2_", + "mycrate::example::<305419896>" }, + { "_RNvNvMCsd9PVOYlP1UU_7mycrateINtB4_7ExamplepKpE3foo14EXAMPLE_STATIC", + ">::foo::EXAMPLE_STATIC", + }, + { "_RINvCs7qp2U7fqm6G_7mycrate7exampleAtj8_EB2_", + "mycrate::example::<[u16; 8]>" }, + { "_RINvCs7qp2U7fqm6G_7mycrate7exampleNtB2_7ExampleBw_EB2_", + "mycrate::example::" }, + { "_RINvMsY_NtCseXNvpPnDBDp_3std4pathNtB6_4Path3neweECs7qp2U7fqm6G_7mycr= ate", + "::new::" }, + { "_RNvNvNvCs7qp2U7fqm6G_7mycrate7EXAMPLE7___getit5___KEY", + "mycrate::EXAMPLE::__getit::__KEY" }, + }; + + for (i =3D 0; i < ARRAY_SIZE(test_cases); i++) { + buf =3D dso__demangle_sym(/*dso=3D*/NULL, /*kmodule=3D*/0, test_cases[i]= .mangled); + if (!buf) { + pr_debug("FAILED to demangle: \"%s\"\n \"%s\"\n", test_cases[i].mangled, + test_cases[i].demangled); + continue; + } + if (strcmp(buf, test_cases[i].demangled)) { + pr_debug("FAILED: %s: %s !=3D %s\n", test_cases[i].mangled, + buf, test_cases[i].demangled); + ret =3D TEST_FAIL; + } + free(buf); + } + + return ret; +} + +DEFINE_SUITE("Demangle Rust", demangle_rust); diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index 8aea344536b8..bb7951c61971 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -157,6 +157,7 @@ DECLARE_SUITE(jit_write_elf); DECLARE_SUITE(api_io); DECLARE_SUITE(demangle_java); DECLARE_SUITE(demangle_ocaml); +DECLARE_SUITE(demangle_rust); DECLARE_SUITE(pfm); DECLARE_SUITE(parse_metric); DECLARE_SUITE(pe_file_parsing); diff --git a/tools/perf/util/symbol-elf.c b/tools/perf/util/symbol-elf.c index f953868521f2..8734e8b6cf84 100644 --- a/tools/perf/util/symbol-elf.c +++ b/tools/perf/util/symbol-elf.c @@ -319,7 +319,7 @@ static char *demangle_sym(struct dso *dso, int kmodule,= const char *elf_name) * DWARF DW_compile_unit has this, but we don't always have access * to it... */ - if (!want_demangle(dso__kernel(dso) || kmodule)) + if (!want_demangle((dso && dso__kernel(dso)) || kmodule)) return demangled; =20 rust_demangle_demangle(elf_name, &rust_demangle); @@ -338,7 +338,7 @@ static char *demangle_sym(struct dso *dso, int kmodule,= const char *elf_name) } demangled =3D tmp; if (rust_demangle_display_demangle(&rust_demangle, demangled, buf_len, - /*alternate=3D*/false) =3D=3D OverflowOk) + /*alternate=3D*/true) =3D=3D OverflowOk) return demangled; } /* Buffer exceeded sensible bounds, return what is there. */ --=20 2.49.0.901.g37484f566f-goog