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3cf50539ec
The special empty value (that we use for array holes, Optional<Value> when empty and a few other other placeholder/sentinel tasks) still exists, but you now create one via JS::js_special_empty_value() and check for it with Value::is_special_empty_value(). The main idea here is to make it very unlikely to accidentally create an unexpected special empty value.
62 lines
3 KiB
C++
62 lines
3 KiB
C++
/*
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* Copyright (c) 2022, David Tuin <davidot@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/TypeCasts.h>
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#include <LibJS/Console.h>
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#include <LibJS/Runtime/ConsoleObject.h>
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#include <LibJS/Runtime/VM.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibWeb/Bindings/MainThreadVM.h>
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#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
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#include <LibWeb/WebIDL/DOMException.h>
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namespace Web::HTML {
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void report_exception_to_console(JS::Value value, JS::Realm& realm, ErrorInPromise error_in_promise)
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{
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auto& console = realm.intrinsics().console_object()->console();
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if (value.is_object()) {
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auto& object = value.as_object();
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auto& vm = object.vm();
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auto name = object.get_without_side_effects(vm.names.name);
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auto message = object.get_without_side_effects(vm.names.message);
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if (name.is_accessor() || message.is_accessor()) {
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// The result is not going to be useful, let's just print the value. This affects DOMExceptions, for example.
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if (is<WebIDL::DOMException>(object)) {
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auto const& exception = static_cast<WebIDL::DOMException const&>(object);
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dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m {}: {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", exception.name(), exception.message());
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} else {
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dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", JS::Value(&object));
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}
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} else {
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dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m [{}] {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", name, message);
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}
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if (is<JS::Error>(object)) {
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// FIXME: We should be doing this for DOMException as well
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// https://webidl.spec.whatwg.org/#js-DOMException-specialness
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// "Additionally, if an implementation gives native Error objects special powers or nonstandard properties (such as a stack property), it should also expose those on DOMException objects."
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auto const& error_value = static_cast<JS::Error const&>(object);
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dbgln("{}", error_value.stack_string(JS::CompactTraceback::Yes));
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console.report_exception(error_value, error_in_promise == ErrorInPromise::Yes);
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return;
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}
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} else {
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dbgln("\033[31;1mUnhandled JavaScript exception{}:\033[0m {}", error_in_promise == ErrorInPromise::Yes ? " (in promise)" : "", value);
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}
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console.report_exception(*JS::Error::create(realm, value.to_string_without_side_effects()), error_in_promise == ErrorInPromise::Yes);
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}
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// https://html.spec.whatwg.org/multipage/webappapis.html#report-the-exception
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void report_exception(JS::Completion const& throw_completion, JS::Realm& realm)
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{
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VERIFY(throw_completion.type() == JS::Completion::Type::Throw);
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report_exception_to_console(throw_completion.value(), realm, ErrorInPromise::No);
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}
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}
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