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