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