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