LXR linux/tools/perf/tests/dso-data.c

   1#include "util.h"
   2
   3#include <stdlib.h>
   4#include <sys/types.h>
   5#include <sys/stat.h>
   6#include <fcntl.h>
   7#include <string.h>
   8
   9#include "machine.h"
  10#include "symbol.h"
  11#include "tests.h"
  12
  13#define TEST_ASSERT_VAL(text, cond) \
  14do { \
  15        if (!(cond)) { \
  16                pr_debug("FAILED %s:%d %s\n", __FILE__, __LINE__, text); \
  17                return -1; \
  18        } \
  19} while (0)
  20
  21static char *test_file(int size)
  22{
  23        static char buf_templ[] = "/tmp/test-XXXXXX";
  24        char *templ = buf_templ;
  25        int fd, i;
  26        unsigned char *buf;
  27
  28        fd = mkstemp(templ);
  29        if (fd < 0) {
  30                perror("mkstemp failed");
  31                return NULL;
  32        }
  33
  34        buf = malloc(size);
  35        if (!buf) {
  36                close(fd);
  37                return NULL;
  38        }
  39
  40        for (i = 0; i < size; i++)
  41                buf[i] = (unsigned char) ((int) i % 10);
  42
  43        if (size != write(fd, buf, size))
  44                templ = NULL;
  45
  46        close(fd);
  47        return templ;
  48}
  49
  50#define TEST_FILE_SIZE (DSO__DATA_CACHE_SIZE * 20)
  51
  52struct test_data_offset {
  53        off_t offset;
  54        u8 data[10];
  55        int size;
  56};
  57
  58struct test_data_offset offsets[] = {
  59        /* Fill first cache page. */
  60        {
  61                .offset = 10,
  62                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  63                .size   = 10,
  64        },
  65        /* Read first cache page. */
  66        {
  67                .offset = 10,
  68                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  69                .size   = 10,
  70        },
  71        /* Fill cache boundary pages. */
  72        {
  73                .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
  74                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  75                .size   = 10,
  76        },
  77        /* Read cache boundary pages. */
  78        {
  79                .offset = DSO__DATA_CACHE_SIZE - DSO__DATA_CACHE_SIZE % 10,
  80                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  81                .size   = 10,
  82        },
  83        /* Fill final cache page. */
  84        {
  85                .offset = TEST_FILE_SIZE - 10,
  86                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  87                .size   = 10,
  88        },
  89        /* Read final cache page. */
  90        {
  91                .offset = TEST_FILE_SIZE - 10,
  92                .data   = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 },
  93                .size   = 10,
  94        },
  95        /* Read final cache page. */
  96        {
  97                .offset = TEST_FILE_SIZE - 3,
  98                .data   = { 7, 8, 9, 0, 0, 0, 0, 0, 0, 0 },
  99                .size   = 3,
 100        },
 101};
 102
 103int test__dso_data(void)
 104{
 105        struct machine machine;
 106        struct dso *dso;
 107        char *file = test_file(TEST_FILE_SIZE);
 108        size_t i;
 109
 110        TEST_ASSERT_VAL("No test file", file);
 111
 112        memset(&machine, 0, sizeof(machine));
 113
 114        dso = dso__new((const char *)file);
 115
 116        /* Basic 10 bytes tests. */
 117        for (i = 0; i < ARRAY_SIZE(offsets); i++) {
 118                struct test_data_offset *data = &offsets[i];
 119                ssize_t size;
 120                u8 buf[10];
 121
 122                memset(buf, 0, 10);
 123                size = dso__data_read_offset(dso, &machine, data->offset,
 124                                     buf, 10);
 125
 126                TEST_ASSERT_VAL("Wrong size", size == data->size);
 127                TEST_ASSERT_VAL("Wrong data", !memcmp(buf, data->data, 10));
 128        }
 129
 130        /* Read cross multiple cache pages. */
 131        {
 132                ssize_t size;
 133                int c;
 134                u8 *buf;
 135
 136                buf = malloc(TEST_FILE_SIZE);
 137                TEST_ASSERT_VAL("ENOMEM\n", buf);
 138
 139                /* First iteration to fill caches, second one to read them. */
 140                for (c = 0; c < 2; c++) {
 141                        memset(buf, 0, TEST_FILE_SIZE);
 142                        size = dso__data_read_offset(dso, &machine, 10,
 143                                                     buf, TEST_FILE_SIZE);
 144
 145                        TEST_ASSERT_VAL("Wrong size",
 146                                size == (TEST_FILE_SIZE - 10));
 147
 148                        for (i = 0; i < (size_t)size; i++)
 149                                TEST_ASSERT_VAL("Wrong data",
 150                                        buf[i] == (i % 10));
 151                }
 152
 153                free(buf);
 154        }
 155
 156        dso__delete(dso);
 157        unlink(file);
 158        return 0;
 159}
 160