Fix memory leak (24GB per second) when rodeos starts with --filter-wa…

libraries/rodeos/include/b1/rodeos/filter.hpp

@@ -50,6 +50,8 @@ struct filter_state : b1::rodeos::data_state<backend_t>, b1::rodeos::console_sta
 #ifdef EOSIO_EOS_VM_OC_RUNTIME_ENABLED
    std::optional<eosvmoc_tier> eosvmoc_tierup;
 #endif
+
+   ~filter_state();
 };
 
 struct callbacks : b1::rodeos::chaindb_callbacks<callbacks>,

libraries/rodeos/include/b1/rodeos/wasm_ql.hpp

@@ -30,6 +30,8 @@ struct shared_state {
 struct thread_state : action_state, console_state, query_state {
    std::shared_ptr<const shared_state> shared = {};
    eosio::vm::wasm_allocator           wa     = {};
+
+   ~thread_state();
 };
 
 class thread_state_cache : public std::enable_shared_from_this<thread_state_cache> {

libraries/rodeos/rodeos.cpp

@@ -273,6 +273,11 @@ void rodeos_db_snapshot::write_deltas(const ship_protocol::get_blocks_result_v2&
    write_deltas(block_num, result.deltas, shutdown);
 }
 
+filter::filter_state::~filter_state() {
+   // wasm allocator must be explicitly freed
+   wa.free();
+}
+
 std::once_flag registered_filter_callbacks;
 
 rodeos_filter::rodeos_filter(eosio::name name, const std::string& wasm_filename, bool profile

libraries/rodeos/wasm_ql.cpp

@@ -163,6 +163,11 @@ shared_state::shared_state(std::shared_ptr<chain_kv::database> db)
 
 shared_state::~shared_state() {}
 
+thread_state::~thread_state() {
+   // wasm allocator must be explicitly freed
+   wa.free();
+}
+
 std::optional<std::vector<uint8_t>> read_code(wasm_ql::thread_state& thread_state, eosio::name account) {
    std::optional<std::vector<uint8_t>> code;
    if (!thread_state.shared->contract_dir.empty()) {