mirror of
https://github.com/LadybirdBrowser/ladybird.git
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89c82abf1f
All other browser already support this feature. There is a Stage 1 proposal to standardize this, but it does not seem to be active.
105 lines
5 KiB
C++
105 lines
5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Linus Groh <linusg@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 <LibJS/AST.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/ExecutionContext.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/SourceRange.h>
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namespace JS {
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Error* Error::create(GlobalObject& global_object)
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{
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return global_object.heap().allocate<Error>(global_object, *global_object.error_prototype());
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}
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Error* Error::create(GlobalObject& global_object, String const& message)
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{
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auto& vm = global_object.vm();
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auto* error = Error::create(global_object);
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u8 attr = Attribute::Writable | Attribute::Configurable;
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error->define_direct_property(vm.names.message, js_string(vm, message), attr);
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return error;
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}
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Error::Error(Object& prototype)
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: Object(prototype)
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{
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populate_stack();
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}
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// 20.5.8.1 InstallErrorCause ( O, options ), https://tc39.es/ecma262/#sec-installerrorcause
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ThrowCompletionOr<void> Error::install_error_cause(Value options)
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{
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auto& vm = this->vm();
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// 1. If Type(options) is Object and ? HasProperty(options, "cause") is true, then
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if (options.is_object() && TRY(options.as_object().has_property(vm.names.cause))) {
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// a. Let cause be ? Get(options, "cause").
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auto cause = TRY(options.as_object().get(vm.names.cause));
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// b. Perform ! CreateNonEnumerableDataPropertyOrThrow(O, "cause", cause).
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MUST(create_non_enumerable_data_property_or_throw(vm.names.cause, cause));
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}
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// 2. Return NormalCompletion(undefined).
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return {};
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}
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void Error::populate_stack()
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{
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AK::StringBuilder stack_string_builder {};
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// Note: We roughly follow V8's formatting
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// Note: The error's name and message get prepended by ErrorPrototype::stack
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// Note: We don't want to capture the global exectution context, so we omit the last frame
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// FIXME: We generate a stack-frame for the Errors constructor, other engines do not
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for (size_t i = vm().execution_context_stack().size() - 1; i > 0; --i) {
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auto const* frame = vm().execution_context_stack()[i];
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auto function_name = frame->function_name;
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if (auto const* current_node = frame->current_node) {
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auto const& source_range = current_node->source_range();
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if (function_name.is_empty())
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stack_string_builder.appendff(" at {}:{}:{}\n", source_range.filename, source_range.start.line, source_range.start.column);
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else
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stack_string_builder.appendff(" at {} ({}:{}:{})\n", function_name, source_range.filename, source_range.start.line, source_range.start.column);
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} else {
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stack_string_builder.appendff(" at {}\n", function_name.is_empty() ? "<unknown>"sv : function_name.view());
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}
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}
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m_stack_string = stack_string_builder.build();
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}
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#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
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ClassName* ClassName::create(GlobalObject& global_object) \
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{ \
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return global_object.heap().allocate<ClassName>(global_object, *global_object.snake_name##_prototype()); \
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} \
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\
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ClassName* ClassName::create(GlobalObject& global_object, String const& message) \
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{ \
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auto& vm = global_object.vm(); \
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auto* error = ClassName::create(global_object); \
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u8 attr = Attribute::Writable | Attribute::Configurable; \
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error->define_direct_property(vm.names.message, js_string(vm, message), attr); \
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return error; \
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} \
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\
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ClassName::ClassName(Object& prototype) \
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: Error(prototype) \
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{ \
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}
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JS_ENUMERATE_NATIVE_ERRORS
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#undef __JS_ENUMERATE
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}
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