Add static function to retrieve public non-runtime functions from a b…

…inary

src/sandbox.hpp

@@ -38,6 +38,7 @@ class Sandbox : public Node
 	void set_program(Ref<ELFResource> program);
 	Ref<ELFResource> get_program();
 	PackedStringArray get_functions() const;
+	static PackedStringArray get_functions_from_binary(const PackedByteArray& binary);
 	// Make a function call to a function in the guest by its name.
 	Variant vmcall(const Variant **args, GDExtensionInt arg_count, GDExtensionCallError &error);
 	Variant vmcall_address(gaddr_t address, const Variant **args, GDExtensionInt arg_count, GDExtensionCallError &error);

src/sandbox_functions.cpp

@@ -16,3 +16,22 @@ PackedStringArray Sandbox::get_functions() const {
 	}
 	return array;
 }
+
+PackedStringArray Sandbox::get_functions_from_binary(const PackedByteArray &binary) {
+	const auto binary_view = std::string_view{ (const char *)binary.ptr(), static_cast<size_t>(binary.size()) };
+	PackedStringArray array;
+
+	// Instantiate Machine without loading the ELF
+	machine_t machine{ binary_view, riscv::MachineOptions<RISCV_ARCH>{
+											.load_program = false, // Do not load the ELF program.
+									} };
+
+	// Get all unmangled public functions from the guest program.
+	for (auto &functions : machine.memory.all_unmangled_function_symbols()) {
+		// Exclude functions that belong to the C/C++ runtime, as well as compiler-generated functions.
+		if (exclude_functions.count(functions) == 0) {
+			array.append(String(std::string(functions).c_str()));
+		}
+	}
+	return array;
+}