linux-kernel - Re: [PATCH v1 2/2] perf test maps: Additional maps__fixup_overlap_and

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Message-ID: <1d172beb-4436-417c-9cee-e090a76dae5f@linaro.org>
Date: Wed, 19 Nov 2025 12:33:54 +0000
From: James Clark <james.clark@...aro.org>
To: Ian Rogers <irogers@...gle.com>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Arnaldo Carvalho de Melo <acme@...nel.org>,
 Namhyung Kim <namhyung@...nel.org>,
 Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
 Jiri Olsa <jolsa@...nel.org>, Adrian Hunter <adrian.hunter@...el.com>,
 German Gomez <german.gomez@....com>, Ravi Bangoria <ravi.bangoria@....com>,
 Christophe Leroy <christophe.leroy@...roup.eu>,
 Chun-Tse Shao <ctshao@...gle.com>, linux-perf-users@...r.kernel.org,
 linux-kernel@...r.kernel.org, kernel test robot <oliver.sang@...el.com>
Subject: Re: [PATCH v1 2/2] perf test maps: Additional
 maps__fixup_overlap_and_insert tests



On 19/11/2025 5:05 am, Ian Rogers wrote:
> Add additional test to the maps covering
> maps__fixup_overlap_and_insert. Change the test suite to be for more
> than just 1 test.
> 
> Signed-off-by: Ian Rogers <irogers@...gle.com>

Reviewed-by: James Clark <james.clark@...aro.org>

> ---
>   tools/perf/tests/builtin-test.c |  2 +-
>   tools/perf/tests/maps.c         | 82 ++++++++++++++++++++++++++++++++-
>   tools/perf/tests/tests.h        |  2 +-
>   3 files changed, 83 insertions(+), 3 deletions(-)
> 
> diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
> index 0d2fb7a4ae5b..9090e8238a44 100644
> --- a/tools/perf/tests/builtin-test.c
> +++ b/tools/perf/tests/builtin-test.c
> @@ -126,7 +126,7 @@ static struct test_suite *generic_tests[] = {
>   	&suite__jit_write_elf,
>   	&suite__pfm,
>   	&suite__api_io,
> -	&suite__maps__merge_in,
> +	&suite__maps,
>   	&suite__demangle_java,
>   	&suite__demangle_ocaml,
>   	&suite__demangle_rust,
> diff --git a/tools/perf/tests/maps.c b/tools/perf/tests/maps.c
> index 4f1f9385ea9c..2c05d62f40dc 100644
> --- a/tools/perf/tests/maps.c
> +++ b/tools/perf/tests/maps.c
> @@ -162,4 +162,84 @@ static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest
>   	return TEST_OK;
>   }
>   
> -DEFINE_SUITE("maps__merge_in", maps__merge_in);
> +static int test__maps__fixup_overlap_and_insert(struct test_suite *t __maybe_unused,
> +						int subtest __maybe_unused)
> +{
> +	struct map_def initial_maps[] = {
> +		{ "target_map", 1000, 2000 },
> +		{ "next_map",   3000, 4000 },
> +	};
> +	struct map_def insert_split = { "split_map", 1400, 1600 };
> +	struct map_def expected_after_split[] = {
> +		{ "target_map", 1000, 1400 },
> +		{ "split_map",  1400, 1600 },
> +		{ "target_map", 1600, 2000 },
> +		{ "next_map",   3000, 4000 },
> +	};
> +
> +	struct map_def insert_eclipse = { "eclipse_map", 2500, 4500 };
> +	struct map_def expected_final[] = {
> +		{ "target_map",  1000, 1400 },
> +		{ "split_map",   1400, 1600 },
> +		{ "target_map",  1600, 2000 },
> +		{ "eclipse_map", 2500, 4500 },
> +		/* "next_map" (3000-4000) is removed */
> +	};
> +
> +	struct map *map_split, *map_eclipse;
> +	int ret;
> +	unsigned int i;
> +	struct maps *maps = maps__new(NULL);
> +
> +	TEST_ASSERT_VAL("failed to create maps", maps);
> +
> +	for (i = 0; i < ARRAY_SIZE(initial_maps); i++) {
> +		struct map *map = dso__new_map(initial_maps[i].name);
> +
> +		TEST_ASSERT_VAL("failed to create map", map);
> +		map__set_start(map, initial_maps[i].start);
> +		map__set_end(map, initial_maps[i].end);
> +		TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
> +		map__put(map);
> +	}
> +
> +	// Check splitting.
> +	map_split = dso__new_map(insert_split.name);
> +	TEST_ASSERT_VAL("failed to create split map", map_split);
> +	map__set_start(map_split, insert_split.start);
> +	map__set_end(map_split, insert_split.end);
> +
> +	ret = maps__fixup_overlap_and_insert(maps, map_split);
> +	TEST_ASSERT_VAL("failed to fixup and insert split map", !ret);
> +
> +	map__zput(map_split);
> +	ret = check_maps(expected_after_split, ARRAY_SIZE(expected_after_split), maps);
> +	TEST_ASSERT_VAL("split check failed", !ret);
> +
> +	// Check cover 1 map with another.
> +	map_eclipse = dso__new_map(insert_eclipse.name);
> +	TEST_ASSERT_VAL("failed to create eclipse map", map_eclipse);
> +	map__set_start(map_eclipse, insert_eclipse.start);
> +	map__set_end(map_eclipse, insert_eclipse.end);
> +
> +	ret = maps__fixup_overlap_and_insert(maps, map_eclipse);
> +	TEST_ASSERT_VAL("failed to fixup and insert eclipse map", !ret);
> +
> +	map__zput(map_eclipse);
> +	ret = check_maps(expected_final, ARRAY_SIZE(expected_final), maps);
> +	TEST_ASSERT_VAL("eclipse check failed", !ret);
> +
> +	maps__zput(maps);
> +	return TEST_OK;
> +}
> +
> +static struct test_case tests__maps[] = {
> +	TEST_CASE("Test merge_in interface", maps__merge_in),
> +	TEST_CASE("Test fix up overlap interface", maps__fixup_overlap_and_insert),
> +	{	.name = NULL, }
> +};
> +
> +struct test_suite suite__maps = {
> +	.desc = "Maps - per process mmaps abstraction",
> +	.test_cases = tests__maps,
> +};
> diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h
> index 33de16dde737..f5fba95b6f3f 100644
> --- a/tools/perf/tests/tests.h
> +++ b/tools/perf/tests/tests.h
> @@ -160,7 +160,7 @@ DECLARE_SUITE(bitmap_print);
>   DECLARE_SUITE(perf_hooks);
>   DECLARE_SUITE(unit_number__scnprint);
>   DECLARE_SUITE(mem2node);
> -DECLARE_SUITE(maps__merge_in);
> +DECLARE_SUITE(maps);
>   DECLARE_SUITE(time_utils);
>   DECLARE_SUITE(jit_write_elf);
>   DECLARE_SUITE(api_io);