summaryrefslogtreecommitdiff
path: root/tools/perf/tests/maps.c
blob: 5bb1123a91a7ccf0f38a021581bcd194c36bec1c (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
// SPDX-License-Identifier: GPL-2.0
#include <inttypes.h>
#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_rb_node *rb_node;
	unsigned int i = 0;
	bool failed = false;

	if (maps__nr_maps(maps) != size) {
		pr_debug("Expected %d maps, got %d", size, maps__nr_maps(maps));
		failed = true;
	} else {
		maps__for_each_entry(maps, rb_node) {
			struct map *map = rb_node->map;

			if (map__start(map) != merged[i].start ||
			    map__end(map) != merged[i].end ||
			    strcmp(map__dso(map)->name, merged[i].name) ||
			    refcount_read(map__refcnt(map)) != 1) {
				failed = true;
			}
			i++;
		}
	}
	if (failed) {
		pr_debug("Expected:\n");
		for (i = 0; i < size; i++) {
			pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: 1\n",
				merged[i].start, merged[i].end, merged[i].name);
		}
		pr_debug("Got:\n");
		maps__for_each_entry(maps, rb_node) {
			struct map *map = rb_node->map;

			pr_debug("\tstart: %" PRIu64 " end: %" PRIu64 " name: '%s' refcnt: %d\n",
				map__start(map),
				map__end(map),
				map__dso(map)->name,
				refcount_read(map__refcnt(map)));
		}
	}
	return failed ? TEST_FAIL : TEST_OK;
}

static int test__maps__merge_in(struct test_suite *t __maybe_unused, int subtest __maybe_unused)
{
	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;
	struct maps *maps = maps__new(NULL);

	TEST_ASSERT_VAL("failed to create maps", maps);

	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__set_start(map, bpf_progs[i].start);
		map__set_end(map, bpf_progs[i].end);
		TEST_ASSERT_VAL("failed to insert map", maps__insert(maps, map) == 0);
		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__set_start(map_kcore1, 100);
	map__set_end(map_kcore1, 1000);

	/* kcore2 map hides behind bpf_prog_2 */
	map__set_start(map_kcore2, 550);
	map__set_end(map_kcore2, 570);

	/* kcore3 map hides behind bpf_prog_3, kcore1 and adds new map */
	map__set_start(map_kcore3, 880);
	map__set_end(map_kcore3, 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__zput(maps);
	return TEST_OK;
}

DEFINE_SUITE("maps__merge_in", maps__merge_in);