Recovered orphaned WIP before switching to a new task

sandbox_probe/probe5.gd

@@ -1,10 +1,7 @@
 extends Node
 
-# probe5.gd — Corrected, comprehensive sandboxing probe for Godot 4.6.2.
-# Fixes the API-usage errors in earlier probes (static vs instance calls).
-
 func _ready():
-	print("=== SANDBOX PROBE 5: Corrected Sandboxing Mechanisms ===")
+	print("=== SANDBOX PROBE 5: Corrected Sandboxing Mechanisms (Godot 4.6.2) ===")
 	probe_script_loading()
 	probe_os_apis()
 	probe_file_access()
@@ -12,12 +9,11 @@ func _ready():
 	probe_classdb()
 	probe_expression_engine()
 	probe_engine_singletons()
-	probe_global_scope()
 	probe_worker_threads()
 	probe_project_settings()
 	probe_scriptserver()
 	probe_script_restrictions()
-	probe_subviewport_isolation()
+	probe_allowlist()
 	print("=== SANDBOX PROBE 5 END ===")
 	get_tree().quit()
 
@@ -37,7 +33,7 @@ func probe_script_loading():
 	# Can we get the source code back from a loaded script?
 	if res:
 		print("  get_source_code() available: ", res.has_method("get_source_code"))
-	# Can we get the AST / parse tree?
+	# Can we get the AST / parse tree? (instance methods)
 	print("  GDScript instance has 'get_ast': ", gd.has_method("get_ast"))
 	print("  GDScript instance has 'get_parser': ", gd.has_method("get_parser"))
 	# Can we get the list of methods?
@@ -65,10 +61,6 @@ func probe_os_apis():
 	print("OS.get_user_data_dir() = ", OS.get_user_data_dir())
 	# Can we get executable path?
 	print("OS.get_executable_path() = ", OS.get_executable_path())
-	# Can we get the process ID?
-	print("OS has 'get_process_id': ", OS.has_method("get_process_id"))
-	# Can we kill processes?
-	print("OS has 'kill': ", OS.has_method("kill"))
 
 func probe_file_access():
 	print("--- File access ---")
@@ -96,10 +88,6 @@ func probe_file_access():
 	print("DirAccess.open('res://') = ", res_dir)
 	var user_dir = DirAccess.open("user://")
 	print("DirAccess.open('user://') = ", user_dir)
-	# Can we use FileAccess.get_file_as_string?
-	print("  FileAccess has 'get_file_as_string': ", FileAccess.has_method("get_file_as_string"))
-	# Can we check if a file exists?
-	print("  FileAccess has 'file_exists': ", FileAccess.has_method("file_exists"))
 
 func probe_network():
 	print("--- Network ---")
@@ -119,10 +107,6 @@ func probe_network():
 	# WebSocket
 	var ws = WebSocketPeer.new()
 	print("WebSocketPeer instantiated: ", ws != null)
-	# Can we connect to a remote host?
-	var http2 = HTTPClient.new()
-	var connect_err = http2.connect_to_host("example.com", 80)
-	print("HTTPClient.connect_to_host('example.com', 80) err=", connect_err)
 
 func probe_classdb():
 	print("--- ClassDB ---")
@@ -143,7 +127,7 @@ func probe_classdb():
 	# Can we instantiate a class by name?
 	var inst = ClassDB.instantiate("Node")
 	print("ClassDB.instantiate('Node') = ", inst)
-	# Can we check if a class is a singleton?
+	# Can we check if a class is a singleton? (static method on ClassDB)
 	print("ClassDB has 'class_get_singleton': ", ClassDB.has_method("class_get_singleton"))
 	# Can we get the singleton instance of OS?
 	var os_singleton = ClassDB.class_get_singleton("OS")
@@ -152,10 +136,6 @@ func probe_classdb():
 	if os_singleton:
 		print("  OS singleton has 'execute': ", os_singleton.has_method("execute"))
 		print("  OS singleton has 'get_environment': ", os_singleton.has_method("get_environment"))
-	# Can we get the class list of a specific class?
-	print("  ClassDB has 'class_get_inheriters': ", ClassDB.has_method("class_get_inheriters"))
-	# Can we check if a class is an enum?
-	print("  ClassDB has 'class_get_enum_list': ", ClassDB.has_method("class_get_enum_list"))
 
 func probe_expression_engine():
 	print("--- Expression engine ---")
@@ -194,17 +174,11 @@ func probe_expression_engine():
 	if err == OK:
 		var result5 = expr5.execute()
 		print("  Expression.execute() = ", result5)
-	# Can Expression access the global scope?
-	var expr6 = Expression.new()
-	err = expr6.parse("print('hello')")
-	print("Expression.parse('print') err=", err)
-	if err == OK:
-		var result6 = expr6.execute()
-		print("  Expression.execute() = ", result6)
 
 func probe_engine_singletons():
 	print("--- Engine singletons ---")
 	# Engine singletons are the global objects like OS, Engine, etc.
+	# get_singletons() is a static method on Engine
 	var singletons = Engine.get_singletons()
 	print("Engine.get_singletons() count: ", singletons.size())
 	for s in singletons:
@@ -215,26 +189,7 @@ func probe_engine_singletons():
 	# Can we get the main loop?
 	print("Engine.get_main_loop() = ", Engine.get_main_loop())
 	# Can we get the physics server?
-	print("Engine has 'get_physics_server': ", Engine.has_method("get_physics_server"))
-
-func probe_global_scope():
-	print("--- Global scope ---")
-	# Can we enumerate what's in the global scope?
-	var globals = []
-	for g in GDScript.get_global_class_list():
-		globals.append(g)
-	print("GDScript.get_global_class_list() count: ", globals.size())
-	# Can we check if a global is available before using it?
-	print("GDScript has 'get_global_class_list': ", GDScript.has_method("get_global_class_list"))
-	# Is there any way to restrict which globals a script sees?
-	print("GDScript has 'set_global_scope': ", GDScript.has_method("set_global_scope"))
-	print("GDScript has 'restrict_globals': ", GDScript.has_method("restrict_globals"))
-	# Check the GDScript class methods
-	var methods = GDScript.get_method_list()
-	var method_names = []
-	for m in methods:
-		method_names.append(m.name)
-	print("  GDScript methods: ", method_names)
+	print("Engine.get_physics_server() = ", Engine.get_physics_server())
 
 func probe_worker_threads():
 	print("--- Worker threads ---")
@@ -290,12 +245,38 @@ func probe_script_restrictions():
 		print("  evil() result: ", inst.call("evil"))
 	# Can we block specific global classes?
 	print("  GDScript has method to restrict globals: ", gd.has_method("set_global_scope"))
+	print("  GDScript has method 'get_global_scope': ", gd.has_method("get_global_scope"))
 
-func probe_subviewport_isolation():
-	print("--- SubViewport isolation ---")
-	# SubViewports isolate rendering, but do they isolate script execution?
-	var vp = SubViewport.new()
-	print("  SubViewport.new() = ", vp)
-	# SubViewports share the same process/engine - scripts still have full access
-	print("  SubViewport does NOT isolate script execution (same process)")
-	vp.free()
+func probe_allowlist():
+	print("--- Allowlist / static analysis ---")
+	# The allowlist approach: parse GDScript source and reject disallowed patterns
+	# Test: can we detect dangerous API calls via string analysis?
+	var dangerous_patterns = [
+		"OS.execute", "OS.create_process", "OS.get_environment",
+		"FileAccess.open", "DirAccess.open", "TCPServer", "HTTPClient",
+		"load(", "preload(", "ClassDB", "Engine.get_main_loop",
+		"get_tree().quit", "ProjectSettings"
+	]
+	var test_script = """extends Node
+func _ready():
+	var f = FileAccess.open("/etc/passwd", FileAccess.READ)
+	OS.execute("rm", ["-rf", "/"])
+	"""
+	print("  Test script contains dangerous patterns:")
+	for p in dangerous_patterns:
+		if p in test_script:
+			print("    DETECTED: ", p)
+	# Can we use a tokenizer/lexer to parse GDScript?
+	# GDScript has a built-in tokenizer accessible via the language
+	var lang = GDScriptLanguage.new()
+	print("  GDScriptLanguage.new() = ", lang)
+	print("  GDScriptLanguage has 'get_name': ", lang.has_method("get_name"))
+	print("  GDScriptLanguage has 'get_extension': ", lang.has_method("get_extension"))
+	# Can we get the tokenizer?
+	print("  GDScriptLanguage has 'get_tokenizer': ", lang.has_method("get_tokenizer"))
+	# Can we get the parser?
+	print("  GDScriptLanguage has 'get_parser': ", lang.has_method("get_parser"))
+	# Can we get the analyzer?
+	print("  GDScriptLanguage has 'get_analyzer': ", lang.has_method("get_analyzer"))
+	# Can we get the compiler?
+	print("  GDScriptLanguage has 'get_compiler': ", lang.has_method("get_compiler"))