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LibWasm: Stub out/implement parsing of all ElementSection segments

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Previously, this was parsing only one kind because I mistakenly assumed
that they all had the same shape, now it can parse two kinds, and will
return NotImplemented for the rest.
This commit is contained in:
Ali Mohammad Pur 2021-05-01 22:49:17 +04:30 • committed by Linus Groh
parent 4d9246ac9d
commit a5194274af
5 changed files with 235 additions and 81 deletions
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139
Userland/Libraries/LibWasm/Parser/Parser.cpp
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@ -931,26 +931,141 @@ ParseResult<StartSection> StartSection::parse(InputStream& stream)
return StartSection { result.release_value() };
}
ParseResult<ElementSection::Element> ElementSection::Element::parse(InputStream& stream)
ParseResult<ElementSection::SegmentType0> ElementSection::SegmentType0::parse(InputStream& stream)
{
auto expression = Expression::parse(stream);
if (expression.is_error())
return expression.error();
auto indices = parse_vector<GenericIndexParser<FunctionIndex>>(stream);
if (indices.is_error())
return indices.error();
return SegmentType0 { ValueType(ValueType::FunctionReference), indices.release_value(), Active { 0, expression.release_value() } };
}
ParseResult<ElementSection::SegmentType1> ElementSection::SegmentType1::parse(InputStream& stream)
{
u8 kind;
stream >> kind;
if (stream.has_any_error())
return with_eof_check(stream, ParseError::ExpectedKindTag);
if (kind != 0)
return ParseError::InvalidTag;
auto indices = parse_vector<GenericIndexParser<FunctionIndex>>(stream);
if (indices.is_error())
return indices.error();
return SegmentType1 { ValueType(ValueType::FunctionReference), indices.release_value() };
}
ParseResult<ElementSection::SegmentType2> ElementSection::SegmentType2::parse(InputStream& stream)
{
dbgln("Type 2");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::SegmentType3> ElementSection::SegmentType3::parse(InputStream& stream)
{
dbgln("Type 3");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::SegmentType4> ElementSection::SegmentType4::parse(InputStream& stream)
{
dbgln("Type 4");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::SegmentType5> ElementSection::SegmentType5::parse(InputStream& stream)
{
dbgln("Type 5");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::SegmentType6> ElementSection::SegmentType6::parse(InputStream& stream)
{
dbgln("Type 6");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::SegmentType7> ElementSection::SegmentType7::parse(InputStream& stream)
{
dbgln("Type 7");
(void)stream;
return ParseError::NotImplemented;
}
ParseResult<ElementSection::AnyElementType> ElementSection::Element::parse(InputStream& stream)
{
ScopeLogger<WASM_BINPARSER_DEBUG> logger("Element");
auto table_index = GenericIndexParser<TableIndex>::parse(stream);
if (table_index.is_error())
return table_index.error();
auto offset = Expression::parse(stream);
if (offset.is_error())
return offset.error();
auto init = parse_vector<GenericIndexParser<FunctionIndex>>(stream);
if (init.is_error())
return init.error();
u8 tag;
stream >> tag;
if (stream.has_any_error())
return with_eof_check(stream, ParseError::ExpectedKindTag);
return Element { table_index.release_value(), offset.release_value(), init.release_value() };
switch (tag) {
case 0x00:
if (auto result = SegmentType0::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x01:
if (auto result = SegmentType1::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x02:
if (auto result = SegmentType2::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x03:
if (auto result = SegmentType3::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x04:
if (auto result = SegmentType4::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x05:
if (auto result = SegmentType5::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x06:
if (auto result = SegmentType6::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
case 0x07:
if (auto result = SegmentType7::parse(stream); result.is_error()) {
return result.error();
} else {
return AnyElementType { result.release_value() };
}
default:
return ParseError::InvalidTag;
}
}
ParseResult<ElementSection> ElementSection::parse(InputStream& stream)
{
ScopeLogger<WASM_BINPARSER_DEBUG> logger("ElementSection");
auto result = Element::parse(stream);
auto result = parse_vector<Element>(stream);
if (result.is_error())
return result.error();
return ElementSection { result.release_value() };