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https://github.com/RGBCube/serenity
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4db5406d62
We now allow any JS::ThrowCompletion<T>, as well as JS::Completion directly (although we'll VERIFY() that it's a throw completion.)
46 lines
2 KiB
C++
46 lines
2 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/Runtime/VM.h>
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#include <LibJS/Runtime/Value.h>
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#include <LibWeb/HTML/Scripting/ExceptionReporter.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/#report-the-exception
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void report_exception(JS::Completion const& throw_completion)
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{
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// FIXME: This is just old code, and does not strictly follow the spec of report an exception.
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// FIXME: We should probably also report these exceptions to the JS console.
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VERIFY(throw_completion.type() == JS::Completion::Type::Throw);
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VERIFY(throw_completion.value().has_value());
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auto thrown_value = *throw_completion.value();
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if (thrown_value.is_object()) {
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auto& object = thrown_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).value_or(JS::js_undefined());
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auto message = object.get_without_side_effects(vm.names.message).value_or(JS::js_undefined());
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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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dbgln("\033[31;1mUnhandled JavaScript exception:\033[0m {}", thrown_value);
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} else {
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dbgln("\033[31;1mUnhandled JavaScript exception:\033[0m [{}] {}", name, message);
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}
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if (is<JS::Error>(object)) {
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auto const& error_value = static_cast<JS::Error const&>(object);
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for (auto const& traceback_frame : error_value.traceback()) {
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auto const& function_name = traceback_frame.function_name;
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auto const& source_range = traceback_frame.source_range;
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dbgln(" {} at {}:{}:{}", function_name, source_range.filename, source_range.start.line, source_range.start.column);
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}
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}
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} else {
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dbgln("\033[31;1mUnhandled JavaScript exception:\033[0m {}", thrown_value);
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}
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}
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}
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