summaryrefslogtreecommitdiffstats
path: root/tools/perf/tests/dso-data.c
blob: 3e6cb171e3d3b7578ede52017b7d08ecdb8d6403 (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
148
149
150
151
152
#include "util.h"

#include <stdlib.h>
#include <linux/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>

#include "machine.h"
#include "symbol.h"
#include "tests.h"

static char *test_file(int size)
{
	static char buf_templ[] = "/tmp/test-XXXXXX";
	char *templ = buf_templ;
	int fd, i;
	unsigned char *buf;

	fd = mkstemp(templ);
	if (fd < 0) {
		perror("mkstemp failed");
		return NULL;
	}

	buf = malloc(size);
	if (!buf) {
		close(fd);
		return NULL;
	}

	for (i = 0; i < size; i++)
		buf[i] = (unsigned char) ((int) i % 10);

	if (size != write(fd, buf, size))
		templ = NULL;

	free(buf);
	close(fd);
	return templ;
}

#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)

struct test_data_offset {
	off_t offset;
	u8 data[10];
	int size;
};

struct test_data_offset offsets[] = {
	/* Fill first cache page. */
	{
		.offset = 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read first cache page. */
	{
		.offset = 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Fill cache boundary pages. */
	{
		.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read cache boundary pages. */
	{
		.offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Fill final cache page. */
	{
		.offset = TEST_FILE_SIZE - 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read final cache page. */
	{
		.offset = TEST_FILE_SIZE - 10,
		.data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
		.size   = 10,
	},
	/* Read final cache page. */
	{
		.offset = TEST_FILE_SIZE - 3,
		.data   = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
		.size   = 3,
	},
};

int test__dso_data(void)
{
	struct machine machine;
	struct dso *dso;
	char *file = test_file(TEST_FILE_SIZE);
	size_t i;

	TEST_ASSERT_VAL("No test file", file);

	memset(&machine, 0, sizeof(machine));

	dso = dso__new((const char *)file);

	/* Basic 10 bytes tests. */
	for (i = 0; i < ARRAY_SIZE(offsets); i++) {
		struct test_data_offset *data = &offsets[i];
		ssize_t size;
		u8 buf[10];

		memset(buf, 0, 10);
		size = dso__data_read_offset(dso, &machine, data->offset,
				     buf, 10);

		TEST_ASSERT_VAL("Wrong size", size == data->size);
		TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
	}

	/* Read cross multiple cache pages. */
	{
		ssize_t size;
		int c;
		u8 *buf;

		buf = malloc(TEST_FILE_SIZE);
		TEST_ASSERT_VAL("ENOMEM\n", buf);

		/* First iteration to fill caches, second one to read them. */
		for (c = 0; c < 2; c++) {
			memset(buf, 0, TEST_FILE_SIZE);
			size = dso__data_read_offset(dso, &machine, 10,
						     buf, TEST_FILE_SIZE);

			TEST_ASSERT_VAL("Wrong size",
				size == (TEST_FILE_SIZE - 10));

			for (i = 0; i < (size_t)size; i++)
				TEST_ASSERT_VAL("Wrong data",
					buf[i] == (i % 10));
		}

		free(buf);
	}

	dso__delete(dso);
	unlink(file);
	return 0;
}