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LibJS+Everywhere: Make PrimitiveString and Utf16String fallible

This makes construction of Utf16String fallible in OOM conditions. The
immediate impact is that PrimitiveString must then be fallible as well,
as it may either transcode UTF-8 to UTF-16, or create a UTF-16 string
from ropes.

There are a couple of places where it is very non-trivial to propagate
the error further. A FIXME has been added to those locations.
This commit is contained in:
Timothy Flynn 2023-01-07 12:24:05 -05:00 committed by Linus Groh
parent d793262beb
commit 115baa7e32
57 changed files with 306 additions and 295 deletions

View file

@ -11,9 +11,9 @@
namespace JS {
namespace Detail {
static NonnullRefPtr<Utf16StringImpl> the_empty_utf16_string()
static ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> the_empty_utf16_string(VM& vm)
{
static NonnullRefPtr<Utf16StringImpl> empty_string = Utf16StringImpl::create();
static NonnullRefPtr<Utf16StringImpl> empty_string = TRY(Utf16StringImpl::create(vm));
return empty_string;
}
@ -22,27 +22,27 @@ Utf16StringImpl::Utf16StringImpl(Utf16Data string)
{
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create()
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm)
{
return adopt_ref(*new Utf16StringImpl());
return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl()));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(Utf16Data string)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16Data string)
{
return adopt_ref(*new Utf16StringImpl(move(string)));
return TRY_OR_THROW_OOM(vm, adopt_nonnull_ref_or_enomem(new (nothrow) Utf16StringImpl(move(string))));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(StringView string)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, StringView string)
{
return create(AK::utf8_to_utf16(string).release_value_but_fixme_should_propagate_errors());
return create(vm, TRY_OR_THROW_OOM(vm, utf8_to_utf16(string)));
}
NonnullRefPtr<Utf16StringImpl> Utf16StringImpl::create(Utf16View const& view)
ThrowCompletionOr<NonnullRefPtr<Utf16StringImpl>> Utf16StringImpl::create(VM& vm, Utf16View const& view)
{
Utf16Data string;
string.ensure_capacity(view.length_in_code_units());
string.append(view.data(), view.length_in_code_units());
return create(move(string));
TRY_OR_THROW_OOM(vm, string.try_ensure_capacity(view.length_in_code_units()));
string.unchecked_append(view.data(), view.length_in_code_units());
return create(vm, move(string));
}
Utf16Data const& Utf16StringImpl::string() const
@ -57,23 +57,28 @@ Utf16View Utf16StringImpl::view() const
}
Utf16String::Utf16String()
: m_string(Detail::the_empty_utf16_string())
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm)
{
return Utf16String { TRY(Detail::the_empty_utf16_string(vm)) };
}
Utf16String::Utf16String(Utf16Data string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16Data string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, move(string))) };
}
Utf16String::Utf16String(StringView string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, StringView string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
}
Utf16String::Utf16String(Utf16View const& string)
: m_string(Detail::Utf16StringImpl::create(move(string)))
ThrowCompletionOr<Utf16String> Utf16String::create(VM& vm, Utf16View const& string)
{
return Utf16String { TRY(Detail::Utf16StringImpl::create(vm, string)) };
}
Utf16String::Utf16String(NonnullRefPtr<Detail::Utf16StringImpl> string)
: m_string(move(string))
{
}