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perf test demangle-rust: Add Rust demangling test

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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 <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alice Ryhl <aliceryhl@google.com>
Cc: Andreas Hindborg <a.hindborg@kernel.org>
Cc: Ariel Ben-Yehuda <ariel.byd@gmail.com>
Cc: Benno Lossin <benno.lossin@proton.me>
Cc: Bill Wendling <morbo@google.com>
Cc: Björn Roy Baron <bjorn3_gh@protonmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Daniel Xu <dxu@dxuuu.xyz>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Howard Chu <howardchu95@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Justin Stitt <justinstitt@google.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nick Desaulniers <nick.desaulniers+lkml@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Trevor Gross <tmgross@umich.edu>
Link: https://lore.kernel.org/r/20250430004128.474388-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers 2025-04-29 17:41:26 -07:00 committed by Arnaldo Carvalho de Melo
parent ac292ea7c3
commit bdf05ccd18
5 changed files with 78 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
tools/perf/tests/Build
View File

@ -56,6 +56,7 @@ perf-test-y += genelf.o
perf-test-y += api-io.o
perf-test-y += demangle-java-test.o
perf-test-y += demangle-ocaml-test.o
perf-test-y += demangle-rust-v0-test.o
perf-test-y += pfm.o
perf-test-y += parse-metric.o
perf-test-y += pe-file-parsing.o

1
tools/perf/tests/builtin-test.c
View File

@ -126,6 +126,7 @@ static struct test_suite *generic_tests[] = {
&suite__maps__merge_in,
&suite__demangle_java,
&suite__demangle_ocaml,
&suite__demangle_rust,
&suite__parse_metric,
&suite__pe_file_parsing,
&suite__expand_cgroup_events,

74
tools/perf/tests/demangle-rust-v0-test.c Normal file
View File

@ -0,0 +1,74 @@
// SPDX-License-Identifier: Apache-2.0 OR MIT
#include "tests.h"
#include "debug.h"
#include "symbol.h"
#include <linux/kernel.h>
#include <stdlib.h>
#include <string.h>
static int test__demangle_rust(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
{
int ret = TEST_OK;
char *buf = NULL;
size_t i;
struct {
const char *mangled, *demangled;
} test_cases[] = {
{ "_RNvMsr_NtCs3ssYzQotkvD_3std4pathNtB5_7PathBuf3newCs15kBYyAo9fc_7mycrate",
"<std::path::PathBuf>::new" },
{ "_RNvCs15kBYyAo9fc_7mycrate7example",
"mycrate::example" },
{ "_RNvMs_Cs4Cv8Wi1oAIB_7mycrateNtB4_7Example3foo",
"<mycrate::Example>::foo" },
{ "_RNvXCs15kBYyAo9fc_7mycrateNtB2_7ExampleNtB2_5Trait3foo",
"<mycrate::Example as mycrate::Trait>::foo" },
{ "_RNvMCs7qp2U7fqm6G_7mycrateNtB2_7Example3foo",
"<mycrate::Example>::foo" },
{ "_RNvMs_Cs7qp2U7fqm6G_7mycrateNtB4_7Example3bar",
"<mycrate::Example>::bar" },
{ "_RNvYNtCs15kBYyAo9fc_7mycrate7ExampleNtB4_5Trait7exampleB4_",
"<mycrate::Example as mycrate::Trait>::example" },
{ "_RNCNvCsgStHSCytQ6I_7mycrate4main0B3_",
"mycrate::main::{closure#0}" },
{ "_RNCNvCsgStHSCytQ6I_7mycrate4mains_0B3_",
"mycrate::main::{closure#1}" },
{ "_RINvCsgStHSCytQ6I_7mycrate7examplelKj1_EB2_",
"mycrate::example::<i32, 1>" },
{ "_RINvCs7qp2U7fqm6G_7mycrate7exampleFG0_RL1_hRL0_tEuEB2_",
"mycrate::example::<for<'a, 'b> fn(&'a u8, &'b u16)>",
},
{ "_RINvCs7qp2U7fqm6G_7mycrate7exampleKy12345678_EB2_",
"mycrate::example::<305419896>" },
{ "_RNvNvMCsd9PVOYlP1UU_7mycrateINtB4_7ExamplepKpE3foo14EXAMPLE_STATIC",
"<mycrate::Example<_, _>>::foo::EXAMPLE_STATIC",
},
{ "_RINvCs7qp2U7fqm6G_7mycrate7exampleAtj8_EB2_",
"mycrate::example::<[u16; 8]>" },
{ "_RINvCs7qp2U7fqm6G_7mycrate7exampleNtB2_7ExampleBw_EB2_",
"mycrate::example::<mycrate::Example, mycrate::Example>" },
{ "_RINvMsY_NtCseXNvpPnDBDp_3std4pathNtB6_4Path3neweECs7qp2U7fqm6G_7mycrate",
"<std::path::Path>::new::<str>" },
{ "_RNvNvNvCs7qp2U7fqm6G_7mycrate7EXAMPLE7___getit5___KEY",
"mycrate::EXAMPLE::__getit::__KEY" },
};
for (i = 0; i < ARRAY_SIZE(test_cases); i++) {
buf = dso__demangle_sym(/*dso=*/NULL, /*kmodule=*/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 != %s\n", test_cases[i].mangled,
buf, test_cases[i].demangled);
ret = TEST_FAIL;
}
free(buf);
}
return ret;
}
DEFINE_SUITE("Demangle Rust", demangle_rust);

1
tools/perf/tests/tests.h
View File

@ -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);

2
tools/perf/util/symbol-elf.c
View File

@ -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;
rust_demangle_demangle(elf_name, &rust_demangle);