1 files changed, 182 insertions, 106 deletions

diff --git a/modules/mono/mono_gd/gd_mono.cpp b/modules/mono/mono_gd/gd_mono.cpp
index 544bfc4615..0a34404154 100644
--- a/modules/mono/mono_gd/gd_mono.cpp
+++ b/modules/mono/mono_gd/gd_mono.cpp
@@ -381,10 +381,10 @@ void GDMono::initialize_load_assemblies() {
 }
 
 bool GDMono::_are_api_assemblies_out_of_sync() {
-	bool out_of_sync = core_api_assembly && (core_api_assembly_out_of_sync || !GDMonoUtils::mono_cache.godot_api_cache_updated);
+	bool out_of_sync = core_api_assembly.assembly && (core_api_assembly.out_of_sync || !GDMonoUtils::mono_cache.godot_api_cache_updated);
 #ifdef TOOLS_ENABLED
 	if (!out_of_sync)
-		out_of_sync = editor_api_assembly && editor_api_assembly_out_of_sync;
+		out_of_sync = editor_api_assembly.assembly && editor_api_assembly.out_of_sync;
 #endif
 	return out_of_sync;
 }
@@ -523,10 +523,10 @@ bool GDMono::load_assembly_from(const String &p_name, const String &p_path, GDMo
 	return true;
 }
 
-APIAssembly::Version APIAssembly::Version::get_from_loaded_assembly(GDMonoAssembly *p_api_assembly, APIAssembly::Type p_api_type) {
-	APIAssembly::Version api_assembly_version;
+ApiAssemblyInfo::Version ApiAssemblyInfo::Version::get_from_loaded_assembly(GDMonoAssembly *p_api_assembly, ApiAssemblyInfo::Type p_api_type) {
+	ApiAssemblyInfo::Version api_assembly_version;
 
-	const char *nativecalls_name = p_api_type == APIAssembly::API_CORE ?
+	const char *nativecalls_name = p_api_type == ApiAssemblyInfo::API_CORE ?
 										   BINDINGS_CLASS_NATIVECALLS :
 										   BINDINGS_CLASS_NATIVECALLS_EDITOR;
 
@@ -549,8 +549,8 @@ APIAssembly::Version APIAssembly::Version::get_from_loaded_assembly(GDMonoAssemb
 	return api_assembly_version;
 }
 
-String APIAssembly::to_string(APIAssembly::Type p_type) {
-	return p_type == APIAssembly::API_CORE ? "API_CORE" : "API_EDITOR";
+String ApiAssemblyInfo::to_string(ApiAssemblyInfo::Type p_type) {
+	return p_type == ApiAssemblyInfo::API_CORE ? "API_CORE" : "API_EDITOR";
 }
 
 bool GDMono::_load_corlib_assembly() {
@@ -567,16 +567,12 @@ bool GDMono::_load_corlib_assembly() {
 }
 
 #ifdef TOOLS_ENABLED
-bool GDMono::copy_prebuilt_api_assembly(APIAssembly::Type p_api_type, const String &p_config) {
-
-	bool &api_assembly_out_of_sync = (p_api_type == APIAssembly::API_CORE) ?
-											 GDMono::get_singleton()->core_api_assembly_out_of_sync :
-											 GDMono::get_singleton()->editor_api_assembly_out_of_sync;
+bool GDMono::copy_prebuilt_api_assembly(ApiAssemblyInfo::Type p_api_type, const String &p_config) {
 
 	String src_dir = GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file(p_config);
 	String dst_dir = GodotSharpDirs::get_res_assemblies_base_dir().plus_file(p_config);
 
-	String assembly_name = p_api_type == APIAssembly::API_CORE ? CORE_API_ASSEMBLY_NAME : EDITOR_API_ASSEMBLY_NAME;
+	String assembly_name = p_api_type == ApiAssemblyInfo::API_CORE ? CORE_API_ASSEMBLY_NAME : EDITOR_API_ASSEMBLY_NAME;
 
 	// Create destination directory if needed
 	if (!DirAccess::exists(dst_dir)) {
@@ -590,35 +586,102 @@ bool GDMono::copy_prebuilt_api_assembly(APIAssembly::Type p_api_type, const Stri
 		}
 	}
 
+	DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+
+	String xml_file = assembly_name + ".xml";
+	if (da->copy(src_dir.plus_file(xml_file), dst_dir.plus_file(xml_file)) != OK)
+		WARN_PRINTS("Failed to copy '" + xml_file + "'.");
+
+	String pdb_file = assembly_name + ".pdb";
+	if (da->copy(src_dir.plus_file(pdb_file), dst_dir.plus_file(pdb_file)) != OK)
+		WARN_PRINTS("Failed to copy '" + pdb_file + "'.");
+
 	String assembly_file = assembly_name + ".dll";
-	String assembly_src = src_dir.plus_file(assembly_file);
-	String assembly_dst = dst_dir.plus_file(assembly_file);
+	if (da->copy(src_dir.plus_file(assembly_file), dst_dir.plus_file(assembly_file)) != OK) {
+		ERR_PRINTS("Failed to copy '" + assembly_file + "'.");
+		return false;
+	}
 
-	if (!FileAccess::exists(assembly_dst) || api_assembly_out_of_sync) {
-		DirAccessRef da = DirAccess::create(DirAccess::ACCESS_FILESYSTEM);
+	return true;
+}
 
-		String xml_file = assembly_name + ".xml";
-		if (da->copy(src_dir.plus_file(xml_file), dst_dir.plus_file(xml_file)) != OK)
-			WARN_PRINTS("Failed to copy '" + xml_file + "'.");
+static bool try_get_cached_api_hash_for(const String &p_api_assemblies_dir, bool &r_out_of_sync) {
+	String core_api_assembly_path = p_api_assemblies_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
+	String editor_api_assembly_path = p_api_assemblies_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
 
-		String pdb_file = assembly_name + ".pdb";
-		if (da->copy(src_dir.plus_file(pdb_file), dst_dir.plus_file(pdb_file)) != OK)
-			WARN_PRINTS("Failed to copy '" + pdb_file + "'.");
+	if (!FileAccess::exists(core_api_assembly_path) || !FileAccess::exists(editor_api_assembly_path))
+		return false;
 
-		Error err = da->copy(assembly_src, assembly_dst);
+	String cached_api_hash_path = p_api_assemblies_dir.plus_file("api_hash_cache.cfg");
 
-		if (err != OK) {
-			ERR_PRINTS("Failed to copy '" + assembly_file + "'.");
-			return false;
-		}
+	if (!FileAccess::exists(cached_api_hash_path))
+		return false;
+
+	Ref<ConfigFile> cfg;
+	cfg.instance();
+	Error cfg_err = cfg->load(cached_api_hash_path);
+	ERR_FAIL_COND_V(cfg_err != OK, false);
 
-		api_assembly_out_of_sync = false;
+	// Checking the modified time is good enough
+	if (FileAccess::get_modified_time(core_api_assembly_path) != (uint64_t)cfg->get_value("core", "modified_time") ||
+			FileAccess::get_modified_time(editor_api_assembly_path) != (uint64_t)cfg->get_value("editor", "modified_time")) {
+		return false;
 	}
 
+	r_out_of_sync = GodotSharpBindings::get_bindings_version() != (uint32_t)cfg->get_value("core", "bindings_version") ||
+					GodotSharpBindings::get_cs_glue_version() != (uint32_t)cfg->get_value("core", "cs_glue_version") ||
+					GodotSharpBindings::get_bindings_version() != (uint32_t)cfg->get_value("editor", "bindings_version") ||
+					GodotSharpBindings::get_cs_glue_version() != (uint32_t)cfg->get_value("editor", "cs_glue_version") ||
+					GodotSharpBindings::get_core_api_hash() != (uint64_t)cfg->get_value("core", "api_hash") ||
+					GodotSharpBindings::get_editor_api_hash() != (uint64_t)cfg->get_value("editor", "api_hash");
+
 	return true;
 }
 
-String GDMono::update_api_assemblies_from_prebuilt() {
+static void create_cached_api_hash_for(const String &p_api_assemblies_dir) {
+
+	String core_api_assembly_path = p_api_assemblies_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
+	String editor_api_assembly_path = p_api_assemblies_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
+	String cached_api_hash_path = p_api_assemblies_dir.plus_file("api_hash_cache.cfg");
+
+	Ref<ConfigFile> cfg;
+	cfg.instance();
+
+	cfg->set_value("core", "modified_time", FileAccess::get_modified_time(core_api_assembly_path));
+	cfg->set_value("editor", "modified_time", FileAccess::get_modified_time(editor_api_assembly_path));
+
+	cfg->set_value("core", "bindings_version", GodotSharpBindings::get_bindings_version());
+	cfg->set_value("core", "cs_glue_version", GodotSharpBindings::get_cs_glue_version());
+	cfg->set_value("editor", "bindings_version", GodotSharpBindings::get_bindings_version());
+	cfg->set_value("editor", "cs_glue_version", GodotSharpBindings::get_cs_glue_version());
+
+	// This assumes the prebuilt api assemblies we copied to the project are not out of sync
+	cfg->set_value("core", "api_hash", GodotSharpBindings::get_core_api_hash());
+	cfg->set_value("editor", "api_hash", GodotSharpBindings::get_editor_api_hash());
+
+	Error err = cfg->save(cached_api_hash_path);
+	ERR_FAIL_COND(err != OK);
+}
+
+bool GDMono::_temp_domain_load_are_assemblies_out_of_sync(const String &p_config) {
+	MonoDomain *temp_domain = GDMonoUtils::create_domain("GodotEngine.Domain.CheckApiAssemblies");
+	ERR_FAIL_NULL_V(temp_domain, "Failed to create temporary domain to check API assemblies");
+	_GDMONO_SCOPE_EXIT_DOMAIN_UNLOAD_(temp_domain);
+
+	_GDMONO_SCOPE_DOMAIN_(temp_domain);
+
+	GDMono::LoadedApiAssembly temp_core_api_assembly;
+	GDMono::LoadedApiAssembly temp_editor_api_assembly;
+
+	if (!_try_load_api_assemblies(temp_core_api_assembly, temp_editor_api_assembly,
+				p_config, /* refonly: */ true, /* loaded_callback: */ NULL)) {
+		return temp_core_api_assembly.out_of_sync || temp_editor_api_assembly.out_of_sync;
+	}
+
+	return true; // Failed to load, assume they're outdated assemblies
+}
+
+String GDMono::update_api_assemblies_from_prebuilt(const String &p_config, const bool *p_core_api_out_of_sync, const bool *p_editor_api_out_of_sync) {
 
 #define FAIL_REASON(m_out_of_sync, m_prebuilt_exists)                            \
 	(                                                                            \
@@ -629,46 +692,55 @@ String GDMono::update_api_assemblies_from_prebuilt() {
 							String("and the prebuilt assemblies are missing.") : \
 							String("and we failed to copy the prebuilt assemblies.")))
 
-	bool api_assembly_out_of_sync = core_api_assembly_out_of_sync || editor_api_assembly_out_of_sync;
+	String dst_assemblies_dir = GodotSharpDirs::get_res_assemblies_base_dir().plus_file(p_config);
 
-	String core_assembly_path = GodotSharpDirs::get_res_assemblies_dir().plus_file(CORE_API_ASSEMBLY_NAME ".dll");
-	String editor_assembly_path = GodotSharpDirs::get_res_assemblies_dir().plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
+	String core_assembly_path = dst_assemblies_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
+	String editor_assembly_path = dst_assemblies_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
 
-	if (!api_assembly_out_of_sync && FileAccess::exists(core_assembly_path) && FileAccess::exists(editor_assembly_path))
-		return String(); // No update needed
+	bool api_assemblies_out_of_sync = false;
 
-	const int CONFIGS_LEN = 2;
-	String configs[CONFIGS_LEN] = { String("Debug"), String("Release") };
+	if (p_core_api_out_of_sync && p_editor_api_out_of_sync) {
+		api_assemblies_out_of_sync = p_core_api_out_of_sync || p_editor_api_out_of_sync;
+	} else if (FileAccess::exists(core_assembly_path) && FileAccess::exists(editor_assembly_path)) {
+		// Determine if they're out of sync
+		if (!try_get_cached_api_hash_for(dst_assemblies_dir, api_assemblies_out_of_sync)) {
+			api_assemblies_out_of_sync = _temp_domain_load_are_assemblies_out_of_sync(p_config);
+		}
+	}
 
-	for (int i = 0; i < CONFIGS_LEN; i++) {
-		String config = configs[i];
+	// Note: Even if only one of the assemblies if missing or out of sync, we update both
 
-		print_verbose("Updating '" + config + "' API assemblies");
+	if (!api_assemblies_out_of_sync && FileAccess::exists(core_assembly_path) && FileAccess::exists(editor_assembly_path))
+		return String(); // No update needed
 
-		String prebuilt_api_dir = GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file(config);
-		String prebuilt_core_dll_path = prebuilt_api_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
-		String prebuilt_editor_dll_path = prebuilt_api_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
+	print_verbose("Updating '" + p_config + "' API assemblies");
 
-		if (!FileAccess::exists(prebuilt_core_dll_path) || !FileAccess::exists(prebuilt_editor_dll_path)) {
-			return FAIL_REASON(api_assembly_out_of_sync, /* prebuilt_exists: */ false);
-		}
+	String prebuilt_api_dir = GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file(p_config);
+	String prebuilt_core_dll_path = prebuilt_api_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
+	String prebuilt_editor_dll_path = prebuilt_api_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
 
-		// Copy the prebuilt Api
-		if (!copy_prebuilt_api_assembly(APIAssembly::API_CORE, config) ||
-				!copy_prebuilt_api_assembly(APIAssembly::API_EDITOR, config)) {
-			return FAIL_REASON(api_assembly_out_of_sync, /* prebuilt_exists: */ true);
-		}
+	if (!FileAccess::exists(prebuilt_core_dll_path) || !FileAccess::exists(prebuilt_editor_dll_path)) {
+		return FAIL_REASON(api_assemblies_out_of_sync, /* prebuilt_exists: */ false);
 	}
 
+	// Copy the prebuilt Api
+	if (!copy_prebuilt_api_assembly(ApiAssemblyInfo::API_CORE, p_config) ||
+			!copy_prebuilt_api_assembly(ApiAssemblyInfo::API_EDITOR, p_config)) {
+		return FAIL_REASON(api_assemblies_out_of_sync, /* prebuilt_exists: */ true);
+	}
+
+	// Cache the api hash of the assemblies we just copied
+	create_cached_api_hash_for(dst_assemblies_dir);
+
 	return String(); // Updated successfully
 
 #undef FAIL_REASON
 }
 #endif
 
-bool GDMono::_load_core_api_assembly() {
+bool GDMono::_load_core_api_assembly(LoadedApiAssembly &r_loaded_api_assembly, const String &p_config, bool p_refonly) {
 
-	if (core_api_assembly)
+	if (r_loaded_api_assembly.assembly)
 		return true;
 
 #ifdef TOOLS_ENABLED
@@ -676,101 +748,115 @@ bool GDMono::_load_core_api_assembly() {
 
 	// If running the project manager, load it from the prebuilt API directory
 	String assembly_dir = !Main::is_project_manager() ?
-								  GodotSharpDirs::get_res_assemblies_dir() :
-								  GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file("Debug");
+								  GodotSharpDirs::get_res_assemblies_base_dir().plus_file(p_config) :
+								  GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file(p_config);
 
 	String assembly_path = assembly_dir.plus_file(CORE_API_ASSEMBLY_NAME ".dll");
 
 	bool success = FileAccess::exists(assembly_path) &&
-				   load_assembly_from(CORE_API_ASSEMBLY_NAME, assembly_path, &core_api_assembly);
+				   load_assembly_from(CORE_API_ASSEMBLY_NAME, assembly_path, &r_loaded_api_assembly.assembly, p_refonly);
 #else
-	bool success = load_assembly(CORE_API_ASSEMBLY_NAME, &core_api_assembly);
+	bool success = load_assembly(CORE_API_ASSEMBLY_NAME, &core_api_assembly, p_refonly);
 #endif
 
 	if (success) {
-		APIAssembly::Version api_assembly_ver = APIAssembly::Version::get_from_loaded_assembly(core_api_assembly, APIAssembly::API_CORE);
-		core_api_assembly_out_of_sync = GodotSharpBindings::get_core_api_hash() != api_assembly_ver.godot_api_hash ||
-										GodotSharpBindings::get_bindings_version() != api_assembly_ver.bindings_version ||
-										GodotSharpBindings::get_cs_glue_version() != api_assembly_ver.cs_glue_version;
-		if (!core_api_assembly_out_of_sync) {
-			GDMonoUtils::update_godot_api_cache();
-
-			_install_trace_listener();
-		}
+		ApiAssemblyInfo::Version api_assembly_ver = ApiAssemblyInfo::Version::get_from_loaded_assembly(r_loaded_api_assembly.assembly, ApiAssemblyInfo::API_CORE);
+		r_loaded_api_assembly.out_of_sync = GodotSharpBindings::get_core_api_hash() != api_assembly_ver.godot_api_hash ||
+											GodotSharpBindings::get_bindings_version() != api_assembly_ver.bindings_version ||
+											GodotSharpBindings::get_cs_glue_version() != api_assembly_ver.cs_glue_version;
 	} else {
-		core_api_assembly_out_of_sync = false;
+		r_loaded_api_assembly.out_of_sync = false;
 	}
 
 	return success;
 }
 
 #ifdef TOOLS_ENABLED
-bool GDMono::_load_editor_api_assembly() {
+bool GDMono::_load_editor_api_assembly(LoadedApiAssembly &r_loaded_api_assembly, const String &p_config, bool p_refonly) {
 
-	if (editor_api_assembly)
+	if (r_loaded_api_assembly.assembly)
 		return true;
 
 	// For the editor and the editor player we want to load it from a specific path to make sure we can keep it up to date
 
 	// If running the project manager, load it from the prebuilt API directory
 	String assembly_dir = !Main::is_project_manager() ?
-								  GodotSharpDirs::get_res_assemblies_dir() :
-								  GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file("Debug");
+								  GodotSharpDirs::get_res_assemblies_base_dir().plus_file(p_config) :
+								  GodotSharpDirs::get_data_editor_prebuilt_api_dir().plus_file(p_config);
 
 	String assembly_path = assembly_dir.plus_file(EDITOR_API_ASSEMBLY_NAME ".dll");
 
 	bool success = FileAccess::exists(assembly_path) &&
-				   load_assembly_from(EDITOR_API_ASSEMBLY_NAME, assembly_path, &editor_api_assembly);
+				   load_assembly_from(EDITOR_API_ASSEMBLY_NAME, assembly_path, &r_loaded_api_assembly.assembly, p_refonly);
 
 	if (success) {
-		APIAssembly::Version api_assembly_ver = APIAssembly::Version::get_from_loaded_assembly(editor_api_assembly, APIAssembly::API_EDITOR);
-		editor_api_assembly_out_of_sync = GodotSharpBindings::get_editor_api_hash() != api_assembly_ver.godot_api_hash ||
-										  GodotSharpBindings::get_bindings_version() != api_assembly_ver.bindings_version ||
-										  GodotSharpBindings::get_cs_glue_version() != api_assembly_ver.cs_glue_version;
+		ApiAssemblyInfo::Version api_assembly_ver = ApiAssemblyInfo::Version::get_from_loaded_assembly(r_loaded_api_assembly.assembly, ApiAssemblyInfo::API_EDITOR);
+		r_loaded_api_assembly.out_of_sync = GodotSharpBindings::get_editor_api_hash() != api_assembly_ver.godot_api_hash ||
+											GodotSharpBindings::get_bindings_version() != api_assembly_ver.bindings_version ||
+											GodotSharpBindings::get_cs_glue_version() != api_assembly_ver.cs_glue_version;
 	} else {
-		editor_api_assembly_out_of_sync = false;
+		r_loaded_api_assembly.out_of_sync = false;
 	}
 
 	return success;
 }
 #endif
 
-bool GDMono::_try_load_api_assemblies() {
-
-	if (!_load_core_api_assembly()) {
+bool GDMono::_try_load_api_assemblies(LoadedApiAssembly &r_core_api_assembly, LoadedApiAssembly &r_editor_api_assembly,
+		const String &p_config, bool p_refonly, CoreApiAssemblyLoadedCallback p_callback) {
+	if (!_load_core_api_assembly(r_core_api_assembly, p_config, p_refonly)) {
 		if (OS::get_singleton()->is_stdout_verbose())
 			print_error("Mono: Failed to load Core API assembly");
 		return false;
 	}
 
 #ifdef TOOLS_ENABLED
-	if (!_load_editor_api_assembly()) {
+	if (!_load_editor_api_assembly(r_editor_api_assembly, p_config, p_refonly)) {
 		if (OS::get_singleton()->is_stdout_verbose())
 			print_error("Mono: Failed to load Editor API assembly");
 		return false;
 	}
 
-	if (editor_api_assembly_out_of_sync)
+	if (r_editor_api_assembly.out_of_sync)
 		return false;
 #endif
 
 	// Check if the core API assembly is out of sync only after trying to load the
 	// editor API assembly. Otherwise, if both assemblies are out of sync, we would
 	// only update the former as we won't know the latter also needs to be updated.
-	if (core_api_assembly_out_of_sync || !GDMonoUtils::mono_cache.godot_api_cache_updated)
+	if (r_core_api_assembly.out_of_sync)
 		return false;
 
+	if (p_callback)
+		return p_callback();
+
 	return true;
 }
 
+bool GDMono::_on_core_api_assembly_loaded() {
+	GDMonoUtils::update_godot_api_cache();
+
+	if (!GDMonoUtils::mono_cache.godot_api_cache_updated)
+		return false;
+
+	get_singleton()->_install_trace_listener();
+
+	return true;
+}
+
+bool GDMono::_try_load_api_assemblies_preset() {
+	return _try_load_api_assemblies(core_api_assembly, editor_api_assembly,
+			get_expected_api_build_config(), /* refonly: */ false, _on_core_api_assembly_loaded);
+}
+
 void GDMono::_load_api_assemblies() {
 
-	bool api_assemblies_loaded = _try_load_api_assemblies();
+	bool api_assemblies_loaded = _try_load_api_assemblies_preset();
 
 	if (!api_assemblies_loaded) {
 #ifdef TOOLS_ENABLED
-		// The API assemblies are out of sync. Fine, try one more time, but this time
-		// update them from the prebuilt assemblies directory before trying to load them.
+		// The API assemblies are out of sync or some other error happened. Fine, try one more time, but
+		// this time update them from the prebuilt assemblies directory before trying to load them again.
 
 		// Shouldn't happen. The project manager loads the prebuilt API assemblies
 		CRASH_COND_MSG(Main::is_project_manager(), "Failed to load one of the prebuilt API assemblies.");
@@ -780,7 +866,7 @@ void GDMono::_load_api_assemblies() {
 		CRASH_COND_MSG(domain_unload_err != OK, "Mono: Failed to unload scripts domain.");
 
 		// 2. Update the API assemblies
-		String update_error = update_api_assemblies_from_prebuilt();
+		String update_error = update_api_assemblies_from_prebuilt("Debug", &core_api_assembly.out_of_sync, &editor_api_assembly.out_of_sync);
 		CRASH_COND_MSG(!update_error.empty(), update_error);
 
 		// 3. Load the scripts domain again
@@ -788,7 +874,7 @@ void GDMono::_load_api_assemblies() {
 		CRASH_COND_MSG(domain_load_err != OK, "Mono: Failed to load scripts domain.");
 
 		// 4. Try loading the updated assemblies
-		api_assemblies_loaded = _try_load_api_assemblies();
+		api_assemblies_loaded = _try_load_api_assemblies_preset();
 #endif
 	}
 
@@ -796,14 +882,14 @@ void GDMono::_load_api_assemblies() {
 		// welp... too bad
 
 		if (_are_api_assemblies_out_of_sync()) {
-			if (core_api_assembly_out_of_sync) {
+			if (core_api_assembly.out_of_sync) {
 				ERR_PRINT("The assembly '" CORE_API_ASSEMBLY_NAME "' is out of sync.");
 			} else if (!GDMonoUtils::mono_cache.godot_api_cache_updated) {
 				ERR_PRINT("The loaded assembly '" CORE_API_ASSEMBLY_NAME "' is in sync, but the cache update failed.");
 			}
 
 #ifdef TOOLS_ENABLED
-			if (editor_api_assembly_out_of_sync) {
+			if (editor_api_assembly.out_of_sync) {
 				ERR_PRINT("The assembly '" EDITOR_API_ASSEMBLY_NAME "' is out of sync.");
 			}
 #endif
@@ -852,15 +938,14 @@ void GDMono::_install_trace_listener() {
 
 #ifdef DEBUG_ENABLED
 	// Install the trace listener now before the project assembly is loaded
-	typedef void (*DebuggingUtils_InstallTraceListener)(MonoObject **);
+	GDMonoClass *debug_utils = get_core_api_assembly()->get_class(BINDINGS_NAMESPACE, "DebuggingUtils");
+	GDMonoMethod *install_func = debug_utils->get_method("InstallTraceListener");
+
 	MonoException *exc = NULL;
-	GDMonoClass *debug_utils = core_api_assembly->get_class(BINDINGS_NAMESPACE, "DebuggingUtils");
-	DebuggingUtils_InstallTraceListener install_func =
-			(DebuggingUtils_InstallTraceListener)debug_utils->get_method_thunk("InstallTraceListener");
-	install_func((MonoObject **)&exc);
+	install_func->invoke_raw(NULL, NULL, &exc);
 	if (exc) {
-		ERR_PRINT("Failed to install 'System.Diagnostics.Trace' listener.");
 		GDMonoUtils::debug_print_unhandled_exception(exc);
+		ERR_PRINT("Failed to install 'System.Diagnostics.Trace' listener.");
 	}
 #endif
 }
@@ -871,7 +956,7 @@ Error GDMono::_load_scripts_domain() {
 
 	print_verbose("Mono: Loading scripts domain...");
 
-	scripts_domain = GDMonoUtils::create_domain("GodotEngine.ScriptsDomain");
+	scripts_domain = GDMonoUtils::create_domain("GodotEngine.Domain.Scripts");
 
 	ERR_FAIL_NULL_V_MSG(scripts_domain, ERR_CANT_CREATE, "Mono: Could not create scripts app domain.");
 
@@ -903,10 +988,8 @@ Error GDMono::_unload_scripts_domain() {
 
 	_domain_assemblies_cleanup(mono_domain_get_id(scripts_domain));
 
-	core_api_assembly = NULL;
 	project_assembly = NULL;
 #ifdef TOOLS_ENABLED
-	editor_api_assembly = NULL;
 	tools_assembly = NULL;
 	tools_project_editor_assembly = NULL;
 #endif
@@ -1076,16 +1159,9 @@ GDMono::GDMono() {
 	root_domain = NULL;
 	scripts_domain = NULL;
 
-	core_api_assembly_out_of_sync = false;
-#ifdef TOOLS_ENABLED
-	editor_api_assembly_out_of_sync = false;
-#endif
-
 	corlib_assembly = NULL;
-	core_api_assembly = NULL;
 	project_assembly = NULL;
 #ifdef TOOLS_ENABLED
-	editor_api_assembly = NULL;
 	tools_assembly = NULL;
 	tools_project_editor_assembly = NULL;
 #endif