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Diffstat (limited to '')
-rw-r--r-- | tools/perf/tests/maps.c | 122 |
1 files changed, 122 insertions, 0 deletions
diff --git a/tools/perf/tests/maps.c b/tools/perf/tests/maps.c new file mode 100644 index 000000000..1ac72919f --- /dev/null +++ b/tools/perf/tests/maps.c @@ -0,0 +1,122 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/compiler.h> +#include <linux/kernel.h> +#include "tests.h" +#include "map.h" +#include "maps.h" +#include "dso.h" +#include "debug.h" + +struct map_def { + const char *name; + u64 start; + u64 end; +}; + +static int check_maps(struct map_def *merged, unsigned int size, struct maps *maps) +{ + struct map *map; + unsigned int i = 0; + + maps__for_each_entry(maps, map) { + if (i > 0) + TEST_ASSERT_VAL("less maps expected", (map && i < size) || (!map && i == size)); + + TEST_ASSERT_VAL("wrong map start", map->start == merged[i].start); + TEST_ASSERT_VAL("wrong map end", map->end == merged[i].end); + TEST_ASSERT_VAL("wrong map name", !strcmp(map->dso->name, merged[i].name)); + TEST_ASSERT_VAL("wrong map refcnt", refcount_read(&map->refcnt) == 1); + + i++; + } + + return TEST_OK; +} + +int test__maps__merge_in(struct test *t __maybe_unused, int subtest __maybe_unused) +{ + struct maps maps; + unsigned int i; + struct map_def bpf_progs[] = { + { "bpf_prog_1", 200, 300 }, + { "bpf_prog_2", 500, 600 }, + { "bpf_prog_3", 800, 900 }, + }; + struct map_def merged12[] = { + { "kcore1", 100, 200 }, + { "bpf_prog_1", 200, 300 }, + { "kcore1", 300, 500 }, + { "bpf_prog_2", 500, 600 }, + { "kcore1", 600, 800 }, + { "bpf_prog_3", 800, 900 }, + { "kcore1", 900, 1000 }, + }; + struct map_def merged3[] = { + { "kcore1", 100, 200 }, + { "bpf_prog_1", 200, 300 }, + { "kcore1", 300, 500 }, + { "bpf_prog_2", 500, 600 }, + { "kcore1", 600, 800 }, + { "bpf_prog_3", 800, 900 }, + { "kcore1", 900, 1000 }, + { "kcore3", 1000, 1100 }, + }; + struct map *map_kcore1, *map_kcore2, *map_kcore3; + int ret; + + maps__init(&maps, NULL); + + for (i = 0; i < ARRAY_SIZE(bpf_progs); i++) { + struct map *map; + + map = dso__new_map(bpf_progs[i].name); + TEST_ASSERT_VAL("failed to create map", map); + + map->start = bpf_progs[i].start; + map->end = bpf_progs[i].end; + maps__insert(&maps, map); + map__put(map); + } + + map_kcore1 = dso__new_map("kcore1"); + TEST_ASSERT_VAL("failed to create map", map_kcore1); + + map_kcore2 = dso__new_map("kcore2"); + TEST_ASSERT_VAL("failed to create map", map_kcore2); + + map_kcore3 = dso__new_map("kcore3"); + TEST_ASSERT_VAL("failed to create map", map_kcore3); + + /* kcore1 map overlaps over all bpf maps */ + map_kcore1->start = 100; + map_kcore1->end = 1000; + + /* kcore2 map hides behind bpf_prog_2 */ + map_kcore2->start = 550; + map_kcore2->end = 570; + + /* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */ + map_kcore3->start = 880; + map_kcore3->end = 1100; + + ret = maps__merge_in(&maps, map_kcore1); + TEST_ASSERT_VAL("failed to merge map", !ret); + + ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps); + TEST_ASSERT_VAL("merge check failed", !ret); + + ret = maps__merge_in(&maps, map_kcore2); + TEST_ASSERT_VAL("failed to merge map", !ret); + + ret = check_maps(merged12, ARRAY_SIZE(merged12), &maps); + TEST_ASSERT_VAL("merge check failed", !ret); + + ret = maps__merge_in(&maps, map_kcore3); + TEST_ASSERT_VAL("failed to merge map", !ret); + + ret = check_maps(merged3, ARRAY_SIZE(merged3), &maps); + TEST_ASSERT_VAL("merge check failed", !ret); + + maps__exit(&maps); + return TEST_OK; +} |