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LibJS+Everywhere: Convert JS::Error to String

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This includes an Error::create overload to create an Error from a UTF-8
StringView. If creating a String from that view fails, the factory will
return an OOM InternalError instead. VM::throw_completion can also make
use of this overload via its perfect forwarding.
This commit is contained in:
Timothy Flynn 2023-02-16 14:09:11 -05:00 • committed by Tim Flynn
parent 153b793638
commit 88814acbd3
36 changed files with 198 additions and 151 deletions
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32
Userland/Libraries/LibJS/Runtime/Error.cpp
View file

@ -10,6 +10,7 @@
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/ExecutionContext.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/ThrowableStringBuilder.h>
#include <LibJS/SourceRange.h>
namespace JS {
@ -19,15 +20,20 @@ NonnullGCPtr<Error> Error::create(Realm& realm)
return realm.heap().allocate<Error>(realm, *realm.intrinsics().error_prototype()).release_allocated_value_but_fixme_should_propagate_errors();
}
NonnullGCPtr<Error> Error::create(Realm& realm, DeprecatedString const& message)
NonnullGCPtr<Error> Error::create(Realm& realm, String message)
{
auto& vm = realm.vm();
auto error = Error::create(realm);
u8 attr = Attribute::Writable | Attribute::Configurable;
error->define_direct_property(vm.names.message, PrimitiveString::create(vm, message), attr);
error->define_direct_property(vm.names.message, PrimitiveString::create(vm, move(message)), attr);
return error;
}
ThrowCompletionOr<NonnullGCPtr<Error>> Error::create(Realm& realm, StringView message)
{
return create(realm, TRY_OR_THROW_OOM(realm.vm(), String::from_utf8(message)));
}
Error::Error(Object& prototype)
: Object(ConstructWithPrototypeTag::Tag, prototype)
{
@ -73,9 +79,10 @@ void Error::populate_stack()
}
}
DeprecatedString Error::stack_string() const
ThrowCompletionOr<String> Error::stack_string(VM& vm) const
{
StringBuilder stack_string_builder;
ThrowableStringBuilder stack_string_builder(vm);
// Note: We roughly follow V8's formatting
// Note: The error's name and message get prepended by ErrorPrototype::stack
// Note: We don't want to capture the global execution context, so we omit the last frame
@ -87,15 +94,15 @@ DeprecatedString Error::stack_string() const
if (!frame.source_range.filename().is_empty() || frame.source_range.start.offset != 0 || frame.source_range.end.offset != 0) {
if (function_name == "<unknown>"sv)
stack_string_builder.appendff(" at {}:{}:{}\n", frame.source_range.filename(), frame.source_range.start.line, frame.source_range.start.column);
MUST_OR_THROW_OOM(stack_string_builder.appendff(" at {}:{}:{}\n", frame.source_range.filename(), frame.source_range.start.line, frame.source_range.start.column));
else
stack_string_builder.appendff(" at {} ({}:{}:{})\n", function_name, frame.source_range.filename(), frame.source_range.start.line, frame.source_range.start.column);
MUST_OR_THROW_OOM(stack_string_builder.appendff(" at {} ({}:{}:{})\n", function_name, frame.source_range.filename(), frame.source_range.start.line, frame.source_range.start.column));
} else {
stack_string_builder.appendff(" at {}\n", function_name.is_empty() ? "<unknown>"sv : function_name.view());
MUST_OR_THROW_OOM(stack_string_builder.appendff(" at {}\n", function_name.is_empty() ? "<unknown>"sv : function_name.view()));
}
}
return stack_string_builder.to_deprecated_string();
return stack_string_builder.to_string();
}
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, ArrayType) \
@ -104,15 +111,20 @@ DeprecatedString Error::stack_string() const
return realm.heap().allocate<ClassName>(realm, *realm.intrinsics().snake_name##_prototype()).release_allocated_value_but_fixme_should_propagate_errors(); \
} \
\
NonnullGCPtr<ClassName> ClassName::create(Realm& realm, DeprecatedString const& message) \
NonnullGCPtr<ClassName> ClassName::create(Realm& realm, String message) \
{ \
auto& vm = realm.vm(); \
auto error = ClassName::create(realm); \
u8 attr = Attribute::Writable | Attribute::Configurable; \
error->define_direct_property(vm.names.message, PrimitiveString::create(vm, message), attr); \
error->define_direct_property(vm.names.message, PrimitiveString::create(vm, move(message)), attr); \
return error; \
} \
\
ThrowCompletionOr<NonnullGCPtr<ClassName>> ClassName::create(Realm& realm, StringView message) \
{ \
return create(realm, TRY_OR_THROW_OOM(realm.vm(), String::from_utf8(message))); \
} \
\
ClassName::ClassName(Object& prototype) \
: Error(prototype) \
{ \