TDBStore: Adds sanity check for storage size when compiled with debug profile

features/storage/kvstore/tdbstore/TDBStore.cpp

@@ -134,6 +134,11 @@ TDBStore::TDBStore(BlockDevice *bd) : _ram_table(0), _max_keys(0),
     for (int i = 0; i < _max_open_iterators; i++) {
         _iterator_table[i] = { 0 };
     }
+
+    /* Minimum space required by Reserved area and master record */
+    MBED_ASSERT(bd->size()
+                >= (align_up(RESERVED_AREA_SIZE + sizeof(reserved_trailer_t), _prog_size)
+                    + record_size(master_rec_key, sizeof(master_record_data_t))));
 }
 
 TDBStore::~TDBStore()