void * es_get_native_obj(duk_context *ctx, int obj_idx, es_native_type_t wanted_type) { duk_get_finalizer(ctx, obj_idx); if(!duk_is_function(ctx, -1)) { duk_error(ctx, DUK_ERR_ERROR, "Object is not of type %s (no finalizer)", native_type_to_str(wanted_type)); } es_native_type_t current_type = duk_get_magic(ctx, -1); duk_pop(ctx); if(current_type != wanted_type) duk_error(ctx, DUK_ERR_ERROR, "Object is %s, expected %s", native_type_to_str(current_type), native_type_to_str(wanted_type)); duk_get_prop_string(ctx, obj_idx, PTRNAME); if(!duk_is_pointer(ctx, -1)) duk_error(ctx, DUK_ERR_ERROR, "Object missing ptr"); void *r = duk_get_pointer(ctx, -1); duk_pop(ctx); return r; }
static duk_ret_t test_get_nonobject(duk_context *ctx, void *udata) { (void) udata; duk_push_int(ctx, 123); duk_get_finalizer(ctx, -1); printf("read finalizer: %s\n", duk_safe_to_string(ctx, -1)); return 0; }
static duk_ret_t test_basic(duk_context *ctx, void *udata) { (void) udata; /* Object to be finalized, special toString() */ duk_push_object(ctx); duk_eval_string(ctx, "(function() { return 'target object'; })"); duk_put_prop_string(ctx, -2, "toString"); /* [ target ] */ /* Set finalizer */ duk_push_c_function(ctx, basic_finalizer, 1); duk_push_string(ctx, "basic_finalizer"); duk_put_prop_string(ctx, -2, "myName"); duk_set_finalizer(ctx, -2); /* [ target ] */ printf("top: %ld\n", (long) duk_get_top(ctx)); /* Get finalizer and check it is correct */ duk_get_finalizer(ctx, -1); duk_get_prop_string(ctx, -1, "myName"); printf("finalizer name: %s\n", duk_to_string(ctx, -1)); duk_pop_2(ctx); printf("top: %ld\n", (long) duk_get_top(ctx)); /* [ target ] */ printf("before set top 0\n"); duk_set_top(ctx, 0); printf("after set top 0\n"); /* [ ] */ return 0; }
static duk_ret_t test_func(duk_context *ctx, void *udata) { (void) udata; if (ctx) { printf("dummy - return here\n"); fflush(stdout); return 0; } /* Up-to-date for Duktape 1.3.0, alphabetical order: * $ cd website/api; ls *.yaml */ (void) duk_alloc_raw(ctx, 0); (void) duk_alloc(ctx, 0); (void) duk_base64_decode(ctx, 0); (void) duk_base64_encode(ctx, 0); (void) duk_buffer_to_string(ctx, 0); (void) duk_call_method(ctx, 0); (void) duk_call_prop(ctx, 0, 0); (void) duk_call(ctx, 0); (void) duk_char_code_at(ctx, 0, 0); (void) duk_check_stack_top(ctx, 0); (void) duk_check_stack(ctx, 0); (void) duk_check_type_mask(ctx, 0, 0); (void) duk_check_type(ctx, 0, 0); (void) duk_compact(ctx, 0); (void) duk_compile_lstring_filename(ctx, 0, "dummy", 0); (void) duk_compile_lstring(ctx, 0, "dummy", 0); (void) duk_compile_string_filename(ctx, 0, "dummy"); (void) duk_compile_string(ctx, 0, "dummy"); (void) duk_compile(ctx, 0); (void) duk_concat(ctx, 0); (void) duk_config_buffer(ctx, 0, NULL, 0); (void) duk_copy(ctx, 0, 0); (void) duk_create_heap_default(); (void) duk_create_heap(NULL, NULL, NULL, NULL, NULL); (void) duk_debugger_attach(ctx, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL); (void) duk_debugger_cooperate(ctx); (void) duk_debugger_detach(ctx); (void) duk_debugger_notify(ctx, 0); (void) duk_debugger_pause(ctx); (void) duk_decode_string(ctx, 0, NULL, NULL); (void) duk_def_prop(ctx, 0, 0); (void) duk_del_prop_index(ctx, 0, 0); (void) duk_del_prop_string(ctx, 0, "dummy"); (void) duk_del_prop(ctx, 0); (void) duk_destroy_heap(ctx); (void) duk_dump_function(ctx); (void) duk_dup_top(ctx); (void) duk_dup(ctx, 0); (void) duk_enum(ctx, 0, 0); (void) duk_equals(ctx, 0, 0); duk_error_va(ctx, 0, NULL, NULL); duk_error(ctx, 0, "dummy"); /* (void) cast won't work without variadic macros */ (void) duk_eval_lstring_noresult(ctx, "dummy", 0); (void) duk_eval_lstring(ctx, "dummy", 0); (void) duk_eval_noresult(ctx); (void) duk_eval_string_noresult(ctx, "dummy"); (void) duk_eval_string(ctx, "dummy"); (void) duk_eval(ctx); (void) duk_fatal(ctx, "dummy"); (void) duk_free_raw(ctx, NULL); (void) duk_free(ctx, NULL); (void) duk_gc(ctx, 0); (void) duk_get_boolean(ctx, 0); (void) duk_get_buffer_data(ctx, 0, NULL); (void) duk_get_buffer(ctx, 0, NULL); (void) duk_get_c_function(ctx, 0); (void) duk_get_context(ctx, 0); (void) duk_get_current_magic(ctx); (void) duk_get_error_code(ctx, 0); (void) duk_get_finalizer(ctx, 0); (void) duk_get_global_string(ctx, 0); (void) duk_get_heapptr(ctx, 0); (void) duk_get_int(ctx, 0); (void) duk_get_length(ctx, 0); (void) duk_get_lstring(ctx, 0, NULL); (void) duk_get_magic(ctx, 0); (void) duk_get_memory_functions(ctx, NULL); (void) duk_get_number(ctx, 0); (void) duk_get_pointer(ctx, 0); (void) duk_get_prop_index(ctx, 0, 0); (void) duk_get_prop_string(ctx, 0, "dummy"); (void) duk_get_prop(ctx, 0); (void) duk_get_prototype(ctx, 0); (void) duk_get_string(ctx, 0); (void) duk_get_top_index(ctx); (void) duk_get_top(ctx); (void) duk_get_type_mask(ctx, 0); (void) duk_get_type(ctx, 0); (void) duk_get_uint(ctx, 0); (void) duk_has_prop_index(ctx, 0, 0); (void) duk_has_prop_string(ctx, 0, "dummy"); (void) duk_has_prop(ctx, 0); (void) duk_hex_decode(ctx, 0); (void) duk_hex_encode(ctx, 0); (void) duk_insert(ctx, 0); (void) duk_instanceof(ctx, 0, 0); (void) duk_is_array(ctx, 0); (void) duk_is_boolean(ctx, 0); (void) duk_is_bound_function(ctx, 0); (void) duk_is_buffer(ctx, 0); (void) duk_is_callable(ctx, 0); (void) duk_is_c_function(ctx, 0); (void) duk_is_constructor_call(ctx); (void) duk_is_dynamic_buffer(ctx, 0); (void) duk_is_ecmascript_function(ctx, 0); (void) duk_is_error(ctx, 0); (void) duk_is_eval_error(ctx, 0); (void) duk_is_fixed_buffer(ctx, 0); (void) duk_is_function(ctx, 0); (void) duk_is_lightfunc(ctx, 0); (void) duk_is_nan(ctx, 0); (void) duk_is_null_or_undefined(ctx, 0); (void) duk_is_null(ctx, 0); (void) duk_is_number(ctx, 0); (void) duk_is_object_coercible(ctx, 0); (void) duk_is_object(ctx, 0); (void) duk_is_pointer(ctx, 0); (void) duk_is_primitive(ctx, 0); (void) duk_is_range_error(ctx, 0); (void) duk_is_reference_error(ctx, 0); (void) duk_is_strict_call(ctx); (void) duk_is_string(ctx, 0); (void) duk_is_syntax_error(ctx, 0); (void) duk_is_thread(ctx, 0); (void) duk_is_type_error(ctx, 0); (void) duk_is_undefined(ctx, 0); (void) duk_is_uri_error(ctx, 0); (void) duk_is_valid_index(ctx, 0); (void) duk_join(ctx, 0); (void) duk_json_decode(ctx, 0); (void) duk_json_encode(ctx, 0); (void) duk_load_function(ctx); (void) duk_map_string(ctx, 0, NULL, NULL); (void) duk_new(ctx, 0); (void) duk_next(ctx, 0, 0); (void) duk_normalize_index(ctx, 0); (void) duk_pcall_method(ctx, 0); (void) duk_pcall_prop(ctx, 0, 0); (void) duk_pcall(ctx, 0); (void) duk_pcompile_lstring_filename(ctx, 0, "dummy", 0); (void) duk_pcompile_lstring(ctx, 0, "dummy", 0); (void) duk_pcompile_string_filename(ctx, 0, "dummy"); (void) duk_pcompile_string(ctx, 0, "dummy"); (void) duk_pcompile(ctx, 0); (void) duk_peval_lstring_noresult(ctx, "dummy", 0); (void) duk_peval_lstring(ctx, "dummy", 0); (void) duk_peval_noresult(ctx); (void) duk_peval_string_noresult(ctx, "dummy"); (void) duk_peval_string(ctx, "dummy"); (void) duk_peval(ctx); (void) duk_pnew(ctx, 0); (void) duk_pop_2(ctx); (void) duk_pop_3(ctx); (void) duk_pop_n(ctx, 0); (void) duk_pop(ctx); (void) duk_push_array(ctx); (void) duk_push_boolean(ctx, 0); (void) duk_push_buffer_object(ctx, 0, 0, 0, 0); (void) duk_push_buffer(ctx, 0, 0); (void) duk_push_c_function(ctx, NULL, 0); (void) duk_push_c_lightfunc(ctx, NULL, 0, 0, 0); (void) duk_push_context_dump(ctx); (void) duk_push_current_function(ctx); (void) duk_push_current_thread(ctx); (void) duk_push_dynamic_buffer(ctx, 0); (void) duk_push_error_object_va(ctx, 0, NULL, NULL); (void) duk_push_error_object(ctx, 0, "dummy"); (void) duk_push_external_buffer(ctx); (void) duk_push_false(ctx); (void) duk_push_fixed_buffer(ctx, 0); (void) duk_push_global_object(ctx); (void) duk_push_global_stash(ctx); (void) duk_push_heap_stash(ctx); (void) duk_push_heapptr(ctx, NULL); (void) duk_push_int(ctx, 0); (void) duk_push_lstring(ctx, "dummy", 0); (void) duk_push_nan(ctx); (void) duk_push_null(ctx); (void) duk_push_number(ctx, 0.0); (void) duk_push_object(ctx); (void) duk_push_pointer(ctx, NULL); (void) duk_push_sprintf(ctx, "dummy"); (void) duk_push_string(ctx, "dummy"); (void) duk_push_this(ctx); (void) duk_push_thread_new_globalenv(ctx); (void) duk_push_thread_stash(ctx, NULL); (void) duk_push_thread(ctx); (void) duk_push_true(ctx); (void) duk_push_uint(ctx, 0); (void) duk_push_undefined(ctx); (void) duk_push_vsprintf(ctx, "dummy", NULL); (void) duk_put_function_list(ctx, 0, NULL); (void) duk_put_global_string(ctx, NULL); (void) duk_put_number_list(ctx, 0, NULL); (void) duk_put_prop_index(ctx, 0, 0); (void) duk_put_prop_string(ctx, 0, "dummy"); (void) duk_put_prop(ctx, 0); (void) duk_realloc_raw(ctx, NULL, 0); (void) duk_realloc(ctx, NULL, 0); (void) duk_remove(ctx, 0); (void) duk_replace(ctx, 0); (void) duk_require_boolean(ctx, 0); (void) duk_require_buffer_data(ctx, 0, NULL); (void) duk_require_buffer(ctx, 0, NULL); (void) duk_require_c_function(ctx, 0); (void) duk_require_callable(ctx, 0); (void) duk_require_context(ctx, 0); (void) duk_require_function(ctx, 0); (void) duk_require_heapptr(ctx, 0); (void) duk_require_int(ctx, 0); (void) duk_require_lstring(ctx, 0, NULL); (void) duk_require_normalize_index(ctx, 0); (void) duk_require_null(ctx, 0); (void) duk_require_number(ctx, 0); (void) duk_require_object_coercible(ctx, 0); (void) duk_require_pointer(ctx, 0); (void) duk_require_stack_top(ctx, 0); (void) duk_require_stack(ctx, 0); (void) duk_require_string(ctx, 0); (void) duk_require_top_index(ctx); (void) duk_require_type_mask(ctx, 0, 0); (void) duk_require_uint(ctx, 0); (void) duk_require_undefined(ctx, 0); (void) duk_require_valid_index(ctx, 0); (void) duk_resize_buffer(ctx, 0, 0); (void) duk_safe_call(ctx, NULL, NULL, 0, 0); (void) duk_safe_to_lstring(ctx, 0, NULL); (void) duk_safe_to_string(ctx, 0); (void) duk_set_finalizer(ctx, 0); (void) duk_set_global_object(ctx); (void) duk_set_magic(ctx, 0, 0); (void) duk_set_prototype(ctx, 0); (void) duk_set_top(ctx, 0); (void) duk_steal_buffer(ctx, 0, NULL); (void) duk_strict_equals(ctx, 0, 0); (void) duk_substring(ctx, 0, 0, 0); (void) duk_swap_top(ctx, 0); (void) duk_swap(ctx, 0, 0); (void) duk_throw(ctx); (void) duk_to_boolean(ctx, 0); (void) duk_to_buffer(ctx, 0, NULL); (void) duk_to_defaultvalue(ctx, 0, 0); (void) duk_to_dynamic_buffer(ctx, 0, NULL); (void) duk_to_fixed_buffer(ctx, 0, NULL); (void) duk_to_int32(ctx, 0); (void) duk_to_int(ctx, 0); (void) duk_to_lstring(ctx, 0, NULL); (void) duk_to_null(ctx, 0); (void) duk_to_number(ctx, 0); (void) duk_to_object(ctx, 0); (void) duk_to_pointer(ctx, 0); (void) duk_to_primitive(ctx, 0, 0); (void) duk_to_string(ctx, 0); (void) duk_to_uint16(ctx, 0); (void) duk_to_uint32(ctx, 0); (void) duk_to_uint(ctx, 0); (void) duk_to_undefined(ctx, 0); (void) duk_trim(ctx, 0); (void) duk_xcopy_top(ctx, NULL, 0); (void) duk_xmove_top(ctx, NULL, 0); printf("never here\n"); fflush(stdout); return 0; }
//void duk_get_finalizer(duk_context *ctx, duk_idx_t index); void aperl_duk_get_finalizer(duk_context *ctx, duk_idx_t index) { duk_get_finalizer(ctx, index); }
static duk_ret_t test_recursive_finalizer(duk_context *ctx, void *udata) { (void) udata; /* Object to be finalized */ duk_push_object(ctx); duk_push_int(ctx, 123); duk_put_prop_string(ctx, -2, "foo"); /* Ecmascript finalizer */ duk_eval_string(ctx, "(function (obj) { print('finalizing obj, obj.foo:', obj.foo); })"); duk_push_int(ctx, 321); duk_put_prop_string(ctx, -2, "bar"); /* [ target finalizer ] */ /* Break the function <-> prototype reference loop so that the * Ecmascript finalizer is not in a reference loop and gets * collected by refcounting. * * (Note that 'prototype' is not configurable so we can't * delete it.) */ duk_push_string(ctx, "dummy"); duk_put_prop_string(ctx, -2, "prototype"); /* Add a Duktape/C finalizer for the Ecmascript finalizer to * exercise both Duktape/C finalizers and recursive finalization */ duk_push_c_function(ctx, c_finalizer, 1); duk_push_int(ctx, 234); duk_put_prop_string(ctx, -2, "quux"); duk_set_finalizer(ctx, -2); /* [ target(foo:123) finalizer(bar:321) ] */ /* Set Ecmascript finalizer to original object */ duk_set_finalizer(ctx, -2); /* [ target(foo:123) ] */ printf("top: %ld\n", (long) duk_get_top(ctx)); /* Read back the finalizer and the finalizer's finalizer */ duk_get_finalizer(ctx, -1); /* target's finalizer */ duk_get_finalizer(ctx, -1); /* finalizer's finalizer */ /* [ target(foo:123) finalizer(bar:321) c_finalizer(quux:234) ] */ duk_get_prop_string(ctx, -2, "bar"); printf("finalizer.bar=%s\n", duk_safe_to_string(ctx, -1)); duk_pop(ctx); duk_get_prop_string(ctx, -1, "quux"); printf("c_finalizer.quux=%s\n", duk_safe_to_string(ctx, -1)); duk_pop(ctx); /* [ target(foo:123) finalizer(bar:321) c_finalizer(quux:234) ] */ printf("before set top 0\n"); duk_set_top(ctx, 0); /* causes finalization */ printf("after set top 0\n"); /* [ ] */ /* Explicit GC (just in case e.g. a reference loop prevented collection) */ printf("before explicit gc\n"); duk_gc(ctx, 0); printf("after explicit gc\n"); return 0; }
JavaScriptObject::JavaScriptObject(JavaTypeMap& typeMap, JNIEnv* env, duk_context* context, jstring name, jobjectArray methods) : m_name(JString(env, name).str()) , m_context(context) , m_instance(nullptr) , m_nextFinalizer(nullptr) { CHECK_STACK(m_context); duk_push_global_object(m_context); if (!duk_get_prop_string(m_context, -1, m_name.c_str())) { duk_pop_2(m_context); throw std::invalid_argument("A global JavaScript object called " + m_name + " was not found"); } m_instance = duk_get_heapptr(m_context, -1); if (m_instance == nullptr) { duk_pop_2(m_context); throw std::invalid_argument("JavaScript global called " + m_name + " is not an object"); } // Make sure that the object has all of the methods we want. jmethodID getName = nullptr; const jsize numArgs = env->GetArrayLength(methods); for (jsize i = 0; i < numArgs; ++i) { auto method = env->GetObjectArrayElement(methods, i); if (getName == nullptr) { jclass methodClass = env->GetObjectClass(method); getName = env->GetMethodID(methodClass, "getName", "()Ljava/lang/String;"); } // Sanity check that as of right now, the object we're proxying has a function with this name. const JString methodName(env, static_cast<jstring>(env->CallObjectMethod(method, getName))); if (!duk_get_prop_string(m_context, -1, methodName)) { duk_pop_3(m_context); throw std::runtime_error("JavaScript global " + m_name + " has no method called " + methodName.str()); } else if (!duk_is_callable(m_context, -1)) { duk_pop_3(m_context); throw std::runtime_error("JavaScript property " + m_name + "." + methodName.str() + " not callable"); } try { // Build a call wrapper that handles marshalling the arguments and return value. m_methods.emplace(std::make_pair(env->FromReflectedMethod(method), buildMethodBody(typeMap, env, method, methodName.str()))); } catch (const std::invalid_argument& e) { duk_pop_3(m_context); throw std::invalid_argument("In proxied method \"" + m_name + "." + methodName.str() + "\": " + e.what()); } // Pop the method property. duk_pop(m_context); } // Keep track of any previously registered finalizer. duk_get_finalizer(m_context, -1); m_nextFinalizer = duk_is_c_function(m_context, -1) ? duk_get_c_function(m_context, -1) : nullptr; duk_pop(m_context); duk_push_c_function(m_context, JavaScriptObject::finalizer, 1); duk_set_finalizer(m_context, -2); // Add 'this' to the list of pointers attached to the proxied instance. // TODO: don't use an array here, just use a separate hidden property for each proxy. if (!duk_has_prop_string(m_context, -1, WRAPPER_THIS_PROP_NAME)) { duk_push_array(m_context); } else { duk_get_prop_string(m_context, -1, WRAPPER_THIS_PROP_NAME); } const duk_size_t length = duk_get_length(m_context, -1); duk_push_pointer(m_context, this); duk_put_prop_index(m_context, -2, static_cast<duk_uarridx_t>(length)); // Add the array (back) to the instance. duk_put_prop_string(m_context, -2, WRAPPER_THIS_PROP_NAME); // Pop the global and our instance. duk_pop_2(m_context); }