tests/regression/tools/map/test_map_query.c

   1 #include <stdio.h>
   2 #include <stdint.h>
   3
   4 #include <lttng/lttng.h>
   5 #include <lttng/handle.h>
   6 #include <lttng/map.h>
   7 #include <lttng/map-query.h>
   8
   9 int main() {
  10         int ret;
  11         enum lttng_map_query_status query_status;
  12         enum lttng_error_code ret_code;
  13         unsigned int map_count, list_count;
  14         enum lttng_map_status map_status;
  15         struct lttng_map_content *map_content = NULL;
  16         struct lttng_map_list *map_list = NULL;
  17         const struct lttng_map *map = NULL;
  18         struct lttng_domain *domains = NULL;
  19         const struct lttng_map_key_value_pair_list *kv_list;
  20         const struct lttng_map_key_value_pair *kv_pair;
  21         const char *key;
  22         int64_t value;
  23         int nb_domains;
  24
  25
  26         nb_domains = lttng_list_domains("mysession", &domains);
  27
  28         struct lttng_handle *handle = lttng_create_handle("mysession", &domains[0]);
  29
  30         struct lttng_map_query *map_query = lttng_map_query_create(
  31                         LTTNG_MAP_QUERY_CONFIG_CPU_SUBSET,
  32                         LTTNG_MAP_QUERY_CONFIG_BUFFER_UST_UID_ALL,
  33                         LTTNG_MAP_QUERY_CONFIG_APP_BITNESS_ALL);
  34
  35         if (!map_query) {
  36                 printf("Error creating the map query\n");
  37                 ret = -1;
  38                 goto end;
  39         }
  40
  41         query_status = lttng_map_query_add_cpu(map_query, 0);
  42         if (query_status != LTTNG_MAP_QUERY_STATUS_OK) {
  43                 printf("Error setting the targeted cpu\n");
  44                 ret = -1;
  45                 goto end;
  46         }
  47
  48         query_status = lttng_map_query_add_key_filter(map_query,
  49                         "total number of hits");
  50         if (query_status != LTTNG_MAP_QUERY_STATUS_OK) {
  51                 printf("Error setting the targeted key\n");
  52                 ret = -1;
  53                 goto end;
  54         }
  55
  56         ret_code = lttng_list_maps(handle, &map_list);
  57         if (ret_code != LTTNG_OK) {
  58                 printf("Error getting list of all maps\n");
  59                 ret = -1;
  60                 goto end;
  61         }
  62
  63         map_status = lttng_map_list_get_count(map_list, &map_count);
  64         if (map_status != LTTNG_MAP_STATUS_OK) {
  65                 printf("Error getting the number of maps\n");
  66                 ret = -1;
  67                 goto end;
  68         }
  69
  70         if (map_count < 1) {
  71                 printf("Error: expecting at least 1 map.\n");
  72                 ret = -1;
  73                 goto end;
  74         }
  75
  76         map = lttng_map_list_get_at_index(map_list, 0);
  77         if (!map) {
  78                 printf("Error getting map at index 0\n");
  79                 ret = -1;
  80                 goto end;
  81         }
  82
  83         ret_code = lttng_list_map_content(handle, map, map_query, &map_content);
  84         if (ret_code != LTTNG_OK) {
  85                 printf("Error executing the query on map\n");
  86                 ret = -1;
  87                 goto end;
  88         }
  89
  90         map_status = lttng_map_content_get_count(map_content, &list_count);
  91         if (map_status != LTTNG_MAP_STATUS_OK) {
  92                 printf("Error getting the number of key value pair list\n");
  93                 ret = -1;
  94                 goto end;
  95         }
  96
  97         if (list_count < 1) {
  98                 printf("Error: expecting at least 1 list.\n");
  99                 ret = -1;
 100                 goto end;
 101         }
 102
 103         kv_list = lttng_map_content_get_at_index(map_content, 0);
 104         if (!kv_list) {
 105                 printf("Error getting key value pair list at index 0\n");
 106                 ret = -1;
 107                 goto end;
 108         }
 109
 110         kv_pair = lttng_map_key_value_pair_list_get_at_index(kv_list, 0);
 111         if (!kv_pair) {
 112                 printf("Error getting key value pair at index 0\n");
 113                 ret = -1;
 114                 goto end;
 115         }
 116
 117         lttng_map_key_value_pair_get_key(kv_pair, &key);
 118         lttng_map_key_value_pair_get_value(kv_pair, &value);
 119
 120         printf("Key: \"%s\", value: %"PRId64"\n", key, value);
 121
 122         ret = 0;
 123 end:
 124         return ret;
 125 }