jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2022, David Tuin <davidot@serenityos.org>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <AK/TypeCasts.h>
8#include <LibJS/Console.h>
9#include <LibJS/Runtime/ConsoleObject.h>
10#include <LibJS/Runtime/VM.h>
11#include <LibJS/Runtime/Value.h>
12#include <LibWeb/Bindings/MainThreadVM.h>
13#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
14
15namespace Web::HTML {
16
17void report_exception_to_console(JS::Value value, JS::Realm& realm, ErrorInPromise error_in_promise)
18{
19 auto& console = realm.intrinsics().console_object()->console();
20
21 if (value.is_object()) {
22 auto& object = value.as_object();
23 auto& vm = object.vm();
24 auto name = object.get_without_side_effects(vm.names.name).value_or(JS::js_undefined());
25 auto message = object.get_without_side_effects(vm.names.message).value_or(JS::js_undefined());
26 if (name.is_accessor() || message.is_accessor()) {
27 // The result is not going to be useful, let's just print the value. This affects DOMExceptions, for example.
28 dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", JS::Value(&object));
29 } else {
30 dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m [{}] {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", name, message);
31 }
32 if (is<JS::Error>(object)) {
33 auto const& error_value = static_cast<JS::Error const&>(object);
34 for (auto& traceback_frame : error_value.traceback()) {
35 auto& function_name = traceback_frame.function_name;
36 auto& source_range = traceback_frame.source_range;
37 dbgln(" {} at {}:{}:{}", function_name, source_range.filename(), source_range.start.line, source_range.start.column);
38 }
39 console.report_exception(error_value, error_in_promise == ErrorInPromise::Yes);
40
41 return;
42 }
43 } else {
44 dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", value);
45 }
46
47 console.report_exception(*JS::Error::create(realm, value.to_string_without_side_effects().release_value_but_fixme_should_propagate_errors()), error_in_promise == ErrorInPromise::Yes);
48}
49
50// https://html.spec.whatwg.org/#report-the-exception
51void report_exception(JS::Completion const& throw_completion, JS::Realm& realm)
52{
53 VERIFY(throw_completion.type() == JS::Completion::Type::Throw);
54 VERIFY(throw_completion.value().has_value());
55 report_exception_to_console(*throw_completion.value(), realm, ErrorInPromise::No);
56}
57
58}