{

uint32_t count;

uint32_t recursionGroupCount = 0;

WASM_PARSER_FAIL_IF(!parseVarUInt32(count), "can't get Type section's count"_s);

WASM_PARSER_FAIL_IF(count > maxTypes, "Type section's count is too big "_s, count, " maximum "_s, maxTypes);

RELEASE_ASSERT(!m_info->m_typeSignatures.capacity());

RELEASE_ASSERT(!m_info->m_rtts.capacity());

WASM_ALLOCATOR_FAIL_IF(!m_info->m_typeSignatures.tryReserveInitialCapacity(count), "can't allocate enough memory for Type section's "_s, count, " entries"_s);

WASM_ALLOCATOR_FAIL_IF(!m_info->m_expandedTypeSignatures.tryReserveInitialCapacity(count), "can't allocate enough memory for Type section's "_s, count, " expanded entries"_s);

WASM_ALLOCATOR_FAIL_IF(!m_info->m_rtts.tryReserveInitialCapacity(count), "can't allocate enough memory for Type section's "_s, count, " canonical RTT entries"_s);

for (uint32_t i = 0; i < count; ++i) {

int8_t typeKind;

WASM_PARSER_FAIL_IF(!parseInt7(typeKind), "can't get "_s, i, "th Type's type"_s);

RefPtr<TypeDefinition> signature;

// When GC is enabled, recursive references can show up in any of these cases.

SetForScope<RecursionGroupInformation> recursionGroupInfo(m_recursionGroupInformation, RecursionGroupInformation { true, m_info->typeCount(), m_info->typeCount() + 1 });

switch (static_cast<TypeKind>(typeKind)) {

case TypeKind::Func: {

WASM_FAIL_IF_HELPER_FAILS(parseFunctionType(i, signature));

break;

}

case TypeKind::Struct: {

WASM_FAIL_IF_HELPER_FAILS(parseStructType(i, signature));

break;

}

case TypeKind::Array: {

WASM_FAIL_IF_HELPER_FAILS(parseArrayType(i, signature));

break;

}

case TypeKind::Rec: {

WASM_FAIL_IF_HELPER_FAILS(parseRecursionGroup(i, signature));

++recursionGroupCount;

WASM_PARSER_FAIL_IF(recursionGroupCount > maxNumberOfRecursionGroups, "number of recursion groups exceeded the limit of "_s, maxNumberOfRecursionGroups);

break;

}

case TypeKind::Sub:

case TypeKind::Subfinal: {

Vector<TypeIndex> empty;

WASM_FAIL_IF_HELPER_FAILS(parseSubtype(i, signature, empty, static_cast<TypeKind>(typeKind) == TypeKind::Subfinal));

break;

}

default:

return fail(i, "th Type is non-Func, non-Struct, and non-Array ", typeKind);

}

WASM_PARSER_FAIL_IF(!signature, "can't allocate enough memory for Type section's "_s, i, "th signature"_s);

// When GC is enabled, type definitions that appear on their own are shorthand

// notations for recursion groups with one type. Here we ensure that if such a

// shorthand type is actually recursive, it is represented with a recursion group.

// Subtyping checks are also done here to ensure sub types are subtypes of their parents.

// Recursion group parsing will append the entries itself, as there may

// be multiple entries that need to be added to the type section for

// each recursion group.

if (signature->is<RecursionGroup>())

m_info->recursionGroups.append(signature.releaseNonNull());

else {

if (signature->hasRecursiveReference()) {

Vector<TypeIndex> types;

bool result = types.tryAppend(signature->index());

WASM_PARSER_FAIL_IF(!result, "can't allocate enough memory for Type section's "_s, i, "th signature"_s);

// group takes ownership of signature via types, and projection takes ownership of group.

RefPtr<TypeDefinition> group = TypeInformation::typeDefinitionForRecursionGroup(types);

RefPtr<TypeDefinition> projection = TypeInformation::typeDefinitionForProjection(group->index(), 0);

signature = WTF::move(projection);

}

TypeInformation::registerCanonicalRTTForType(signature->index());

m_info->m_rtts.append(TypeInformation::getCanonicalRTT(signature->index()));

const TypeDefinition& unrolled = signature->unroll();

if (unrolled.is<Subtype>()) {

WASM_PARSER_FAIL_IF(m_info->m_rtts.last()->displaySizeExcludingThis() > maxSubtypeDepth, "subtype depth for Type section's "_s, i, "th signature exceeded the limits of "_s, maxSubtypeDepth);

WASM_FAIL_IF_HELPER_FAILS(checkSubtypeValidity(unrolled));

}

m_info->m_typeSignatures.append(signature.releaseNonNull());

}

}

RELEASE_ASSERT(m_info->m_typeSignatures.size() == m_info->m_rtts.size());

for (auto& sig : m_info->m_typeSignatures)

m_info->m_expandedTypeSignatures.append(Ref { sig->expand() });

RELEASE_ASSERT(m_info->m_typeSignatures.size() == m_info->m_expandedTypeSignatures.size());

return { };

{

uint32_t importCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(importCount), "can't get Import section's count"_s);

WASM_PARSER_FAIL_IF(importCount > maxImports, "Import section's count is too big "_s, importCount, " maximum "_s, maxImports);

RELEASE_ASSERT(!m_info->globals.capacity());

RELEASE_ASSERT(!m_info->imports.capacity());

RELEASE_ASSERT(!m_info->importFunctionTypeSignatureIndices.capacity());

RELEASE_ASSERT(!m_info->importExceptionTypeSignatureIndices.capacity());

WASM_ALLOCATOR_FAIL_IF(!m_info->globals.tryReserveInitialCapacity(importCount), "can't allocate enough memory for "_s, importCount, " globals"_s); // FIXME this over-allocates when we fix the FIXMEs below.

WASM_ALLOCATOR_FAIL_IF(!m_info->imports.tryReserveInitialCapacity(importCount), "can't allocate enough memory for "_s, importCount, " imports"_s); // FIXME this over-allocates when we fix the FIXMEs below.

WASM_ALLOCATOR_FAIL_IF(!m_info->importFunctionTypeSignatureIndices.tryReserveInitialCapacity(importCount), "can't allocate enough memory for "_s, importCount, " import function signatures"_s); // FIXME this over-allocates when we fix the FIXMEs below.

WASM_ALLOCATOR_FAIL_IF(!m_info->importExceptionTypeSignatureIndices.tryReserveInitialCapacity(importCount), "can't allocate enough memory for "_s, importCount, " import exception signatures"_s); // FIXME this over-allocates when we fix the FIXMEs below.

for (uint32_t importNumber = 0; importNumber < importCount; ++importNumber) {

uint32_t moduleLen;

uint32_t fieldLen;

Name moduleString;

Name fieldString;

ExternalKind kind;

unsigned kindIndex { 0 };

WASM_PARSER_FAIL_IF(!parseVarUInt32(moduleLen), "can't get "_s, importNumber, "th Import's module name length"_s);

WASM_ALLOCATOR_FAIL_IF(!consumeUTF8String(moduleString, moduleLen), "can't get "_s, importNumber, "th Import's module name of length "_s, moduleLen);

WASM_PARSER_FAIL_IF(!parseVarUInt32(fieldLen), "can't get "_s, importNumber, "th Import's field name length in module '"_s, moduleString, "'"_s);

WASM_ALLOCATOR_FAIL_IF(!consumeUTF8String(fieldString, fieldLen), "can't get "_s, importNumber, "th Import's field name of length "_s, moduleLen, " in module '"_s, moduleString, "'"_s);

WASM_PARSER_FAIL_IF(!parseExternalKind(kind), "can't get "_s, importNumber, "th Import's kind in module '"_s, moduleString, "' field '"_s, fieldString, "'"_s);

switch (kind) {

case ExternalKind::Function: {

uint32_t functionTypeIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(functionTypeIndex), "can't get "_s, importNumber, "th Import's function signature in module '"_s, moduleString, "' field '"_s, fieldString, "'"_s);

WASM_PARSER_FAIL_IF(functionTypeIndex >= m_info->typeCount(), "invalid function signature for "_s, importNumber, "th Import, "_s, functionTypeIndex, " is out of range of "_s, m_info->typeCount(), " in module '"_s, moduleString, "' field '"_s, fieldString, "'"_s);

kindIndex = m_info->importFunctionTypeSignatureIndices.size();

auto index = TypeSignatureIndex(functionTypeIndex);

WASM_PARSER_FAIL_IF(!m_info->expandedTypeSignature(index).is<FunctionSignature>(), importNumber, "th Function type "_s, functionTypeIndex, " doesn't have a function signature"_s);

m_info->importFunctionTypeSignatureIndices.append(index);

break;

}

case ExternalKind::Table: {

bool isImport = true;

kindIndex = m_info->tables.size();

PartialResult result = parseTableHelper(isImport);

if (!result) [[unlikely]]

return makeUnexpected(WTF::move(result.error()));

break;

}

case ExternalKind::Memory: {

bool isImport = true;

kindIndex = m_info->memories.size();

PartialResult result = parseMemoryHelper(isImport);

if (!result) [[unlikely]]

return makeUnexpected(WTF::move(result.error()));

break;

}

case ExternalKind::Global: {

GlobalInformation global;

WASM_FAIL_IF_HELPER_FAILS(parseGlobalType(global));

// Only mutable globals need floating bindings.

if (global.mutability == Mutability::Mutable)

global.bindingMode = GlobalInformation::BindingMode::Portable;

kindIndex = m_info->globals.size();

m_info->globals.append(WTF::move(global));

break;

}

case ExternalKind::Exception: {

uint8_t tagType;

WASM_PARSER_FAIL_IF(!parseUInt8(tagType), "can't get "_s, importNumber, "th Import exception's tag type"_s);

WASM_PARSER_FAIL_IF(tagType, importNumber, "th Import exception has tag type "_s, tagType, " but the only supported tag type is 0"_s);

uint32_t exceptionSignatureIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(exceptionSignatureIndex), "can't get "_s, importNumber, "th Import's exception signature in module '"_s, moduleString, "' field '"_s, fieldString, "'"_s);

WASM_PARSER_FAIL_IF(exceptionSignatureIndex >= m_info->typeCount(), "invalid exception signature for "_s, importNumber, "th Import, "_s, exceptionSignatureIndex, " is out of range of "_s, m_info->typeCount(), " in module '"_s, moduleString, "' field '"_s, fieldString, "'"_s);

kindIndex = m_info->importExceptionTypeSignatureIndices.size();

auto index = TypeSignatureIndex(exceptionSignatureIndex);

const auto& expanded = m_info->expandedTypeSignature(index);

WASM_PARSER_FAIL_IF(!expanded.is<FunctionSignature>(), importNumber, "th Exception type "_s, exceptionSignatureIndex, " doesn't have a function signature"_s);

WASM_PARSER_FAIL_IF(!expanded.as<FunctionSignature>()->returnsVoid(), importNumber, "th Exception type cannot have a non-void return type "_s, exceptionSignatureIndex);

m_info->importExceptionTypeSignatureIndices.append(index);

break;

}

}

m_info->imports.append({ WTF::move(moduleString), WTF::move(fieldString), kind, kindIndex });

}

m_info->firstInternalGlobal = m_info->globals.size();

return { };

{

uint32_t count;

WASM_PARSER_FAIL_IF(!parseVarUInt32(count), "can't get Function section's count"_s);

WASM_PARSER_FAIL_IF(count > maxFunctions, "Function section's count is too big "_s, count, " maximum "_s, maxFunctions);

RELEASE_ASSERT(!m_info->internalFunctionTypeSignatureIndices.capacity());

RELEASE_ASSERT(!m_info->functions.capacity());

WASM_ALLOCATOR_FAIL_IF(!m_info->internalFunctionTypeSignatureIndices.tryReserveInitialCapacity(count), "can't allocate enough memory for "_s, count, " Function signatures"_s);

WASM_ALLOCATOR_FAIL_IF(!m_info->functions.tryReserveInitialCapacity(count), "can't allocate enough memory for "_s, count, "Function locations"_s);

for (uint32_t i = 0; i < count; ++i) {

uint32_t typeNumber;

WASM_PARSER_FAIL_IF(!parseVarUInt32(typeNumber), "can't get "_s, i, "th Function's type number"_s);

WASM_PARSER_FAIL_IF(typeNumber >= m_info->typeCount(), i, "th Function type number is invalid "_s, typeNumber);

auto index = TypeSignatureIndex(typeNumber);

WASM_PARSER_FAIL_IF(!m_info->expandedTypeSignature(index).is<FunctionSignature>(), i, "th Function type "_s, typeNumber, " doesn't have a function signature"_s);

// The Code section fixes up start and end.

size_t start = 0;

size_t end = 0;

m_info->internalFunctionTypeSignatureIndices.append(index);

m_info->functions.append({ start, end, Vector<uint8_t>() });

}

// Note that `initializeFunctionTrackers` should only be used after both parseImport and parseFunction

// finish updating importFunctionTypeSignatureIndices and internalFunctionTypeSignatureIndices.

m_info->initializeFunctionTrackers();

return { };

{

constexpr uint8_t invalidFlagsMask = ~0x07;

const uint8_t hasInvalidFlags = flags & invalidFlagsMask;

return !hasInvalidFlags;

{

ASSERT(!maximum);

uint8_t flags;

constexpr uint8_t hasMaxMask = 1;

constexpr uint8_t isSharedMask = 1 << 1;

constexpr uint8_t is64bitMask = 1 << 2;

WASM_PARSER_FAIL_IF(!parseUInt8(flags), "can't parse resizable limits flags"_s);

WASM_PARSER_FAIL_IF(!limitsFlagIsValid(flags), "resizable limits flag are not valid "_s, hex(flags, 2, Lowercase));

if constexpr (LimitType != LimitsType::Memory)

WASM_PARSER_FAIL_IF(flags & isSharedMask, "can't use shared limits for non memory"_s);

isShared = flags & isSharedMask;

is64bit = flags & is64bitMask;

WASM_PARSER_FAIL_IF(isShared && !Options::useWasmFaultSignalHandler(), "shared memory is not enabled"_s);

WASM_PARSER_FAIL_IF(is64bit && !Options::useWasmMemory64(), "Memory64 is not enabled"_s);

if (is64bit)

WASM_PARSER_FAIL_IF(!parseVarUInt64(initial), "can't parse resizable limits initial page count"_s);

else {

uint32_t initial32;

WASM_PARSER_FAIL_IF(!parseVarUInt32(initial32), "can't parse resizable limits initial page count"_s);

initial = initial32;

}

if (flags & hasMaxMask) {

if (is64bit) {

uint64_t maximumInt;

WASM_PARSER_FAIL_IF(!parseVarUInt64(maximumInt), "can't parse resizable limits maximum page count"_s);

WASM_PARSER_FAIL_IF(initial > maximumInt, "resizable limits has an initial page count of "_s, initial, " which is greater than its maximum "_s, maximumInt);

maximum = maximumInt;

} else {

uint32_t maximumInt;

WASM_PARSER_FAIL_IF(!parseVarUInt32(maximumInt), "can't parse resizable limits maximum page count"_s);

WASM_PARSER_FAIL_IF(initial > maximumInt, "resizable limits has an initial page count of "_s, initial, " which is greater than its maximum "_s, maximumInt);

maximum = maximumInt;

}

}

WASM_PARSER_FAIL_IF(isShared && !maximum, "shared memory must have a maximum size"_s);

return { };

{

WASM_PARSER_FAIL_IF(m_info->tableCount() >= maxTables, "Table count of "_s, m_info->tableCount(), " is too big, maximum "_s, maxTables);

Type type;

bool hasInitExpr = false;

TableInformation::InitializationType tableInitType = TableInformation::Default;

uint64_t initialBitsOrImportNumber = 0;

int8_t firstByte = 0;

WASM_PARSER_FAIL_IF(!peekInt7(firstByte), "can't parse Table information"_s);

if (!isImport && static_cast<TypeKind>(firstByte) == TypeKind::Void) {

hasInitExpr = true;

m_offset++;

uint8_t reservedByte;

WASM_PARSER_FAIL_IF(!parseUInt8(reservedByte) || reservedByte, "can't parse explicitly initialized Table's reserved byte"_s);

}

WASM_PARSER_FAIL_IF(!parseValueType(m_info, type), "can't parse Table type"_s);

WASM_PARSER_FAIL_IF(!isRefType(type), "Table type should be a ref type, got "_s, type);

if (!hasInitExpr && !isImport)

WASM_PARSER_FAIL_IF(!isDefaultableType(type), "Table's type must be defaultable"_s);

uint64_t initial;

std::optional<uint64_t> maximum;

bool isShared = false;

bool isTable64;

PartialResult limits = parseResizableLimits<LimitsType::Table>(initial, maximum, isShared, isTable64);

ASSERT(!isShared);

if (!limits) [[unlikely]]

return makeUnexpected(WTF::move(limits.error()));

WASM_PARSER_FAIL_IF(initial > maxTableEntries, "Table's initial page count of "_s, initial, " is too big, maximum "_s, maxTableEntries);

ASSERT(!maximum || *maximum >= initial);

if (hasInitExpr) {

uint8_t initOpcode;

Type typeForInitOpcode;

bool isExtendedConstantExpression;

v128_t unusedVector { };

WASM_FAIL_IF_HELPER_FAILS(parseInitExpr(initOpcode, isExtendedConstantExpression, initialBitsOrImportNumber, unusedVector, type, typeForInitOpcode));

WASM_PARSER_FAIL_IF(!isSubtype(typeForInitOpcode, type), "Table init_expr opcode of type "_s, typeForInitOpcode.kind, " doesn't match table's type "_s, type.kind);

if (isExtendedConstantExpression)

tableInitType = TableInformation::FromExtendedExpression;

else if (initOpcode == GetGlobal)

tableInitType = TableInformation::FromGlobalImport;

else if (initOpcode == RefFunc)

tableInitType = TableInformation::FromRefFunc;

else if (initOpcode == RefNull)

tableInitType = TableInformation::FromRefNull;

else

RELEASE_ASSERT_NOT_REACHED();

}

TableElementType tableType = isSubtype(type, funcrefType()) ? TableElementType::Funcref : TableElementType::Externref;

m_info->tables.append(TableInformation(initial, maximum, isImport, tableType, type, tableInitType, initialBitsOrImportNumber));

return { };

{

uint32_t count;

WASM_PARSER_FAIL_IF(!parseVarUInt32(count), "can't get Table's count"_s);

for (unsigned i = 0; i < count; ++i) {

bool isImport = false;

PartialResult result = parseTableHelper(isImport);

if (!result) [[unlikely]]

return makeUnexpected(WTF::move(result.error()));

}

return { };

{

// This test is here in order to handle the case of a single imported memory and a single specified memory

// in its own section, which is legal iff multimemory is enabled

if (!Options::useWasmMultiMemory())

WASM_PARSER_FAIL_IF(m_info->memoryCount(), "there can at most be one Memory section for now"_s);

WASM_PARSER_FAIL_IF(m_info->memoryCount() >= maxMemories, "there can be at most "_s, maxMemories, " memories"_s);

PageCount initialPageCount;

PageCount maximumPageCount;

bool isShared { false };

bool isMemory64 { false };

{

uint64_t initial;

std::optional<uint64_t> maximum;

PartialResult limits = parseResizableLimits<LimitsType::Memory>(initial, maximum, isShared, isMemory64);

if (!limits) [[unlikely]]

return makeUnexpected(WTF::move(limits.error()));

ASSERT(!maximum || *maximum >= initial);

WASM_PARSER_FAIL_IF(!PageCount::isValid(initial), "Memory's initial page count of "_s, initial, " is invalid"_s);

// FIXME(wasm-memory64): for now IPInt checks m_cachedIsMemory64 (flag if memory 0 is 64-bit)

// no matter which memory is being accessed

if (isMemory64)

WASM_PARSER_FAIL_IF(m_info->memoryCount(), "if using memory64 then multiple memories are illegal for now");

initialPageCount = PageCount(initial);

if (maximum) {

WASM_PARSER_FAIL_IF(!PageCount::isValid(*maximum), "Memory's maximum page count of "_s, *maximum, " is invalid"_s);

maximumPageCount = PageCount(*maximum);

}

}

ASSERT(initialPageCount);

ASSERT(!maximumPageCount || maximumPageCount >= initialPageCount);

m_info->memories.append(MemoryInformation(initialPageCount, maximumPageCount, isShared, isImport, isMemory64));

return { };

{

uint32_t count;

WASM_PARSER_FAIL_IF(!parseVarUInt32(count), "can't parse Memory section's count"_s);

if (!count)

return { };

if (!Options::useWasmMultiMemory())

WASM_PARSER_FAIL_IF(count != 1, "Memory section has more than one memory, WebAssembly currently only allows zero or one"_s);

for (unsigned i = 0; i < count; ++i) {

bool isImport = false;

PartialResult result = parseMemoryHelper(isImport);

if (!result) [[unlikely]]

return makeUnexpected(WTF::move(result.error()));

}

return { };

{

uint32_t globalCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(globalCount), "can't get Global section's count"_s);

WASM_PARSER_FAIL_IF(globalCount > maxGlobals, "Global section's count is too big "_s, globalCount, " maximum "_s, maxGlobals);

size_t totalGlobals = globalCount + m_info->firstInternalGlobal;

ASSERT(m_info->firstInternalGlobal == m_info->globals.size());

WASM_PARSER_FAIL_IF(!m_info->globals.tryGrowCapacityBy(globalCount), "can't allocate memory for "_s, totalGlobals, " globals"_s);

for (uint32_t globalIndex = 0; globalIndex < globalCount; ++globalIndex) {

GlobalInformation global;

uint8_t initOpcode;

v128_t initVector { };

uint64_t initialBitsOrImportNumber = 0;

WASM_FAIL_IF_HELPER_FAILS(parseGlobalType(global));

Type typeForInitOpcode;

bool isExtendedConstantExpression;

WASM_FAIL_IF_HELPER_FAILS(parseInitExpr(initOpcode, isExtendedConstantExpression, initialBitsOrImportNumber, initVector, global.type, typeForInitOpcode));

if (initOpcode == ExtSIMD && !isExtendedConstantExpression) {

RELEASE_ASSERT(typeForInitOpcode.isV128());

global.initialBits.initialVector = initVector;

} else

global.initialBits.initialBitsOrImportNumber = initialBitsOrImportNumber;

if (isExtendedConstantExpression)

global.initializationType = GlobalInformation::FromExtendedExpression;

else if (initOpcode == GetGlobal)

global.initializationType = GlobalInformation::FromGlobalImport;

else if (initOpcode == RefFunc)

global.initializationType = GlobalInformation::FromRefFunc;

else

global.initializationType = GlobalInformation::FromExpression;

WASM_PARSER_FAIL_IF(!isSubtype(typeForInitOpcode, global.type), "Global init_expr opcode of type "_s, typeForInitOpcode.kind, " doesn't match global's type "_s, global.type.kind);

if (initOpcode == RefFunc) {

ASSERT(global.initializationType != GlobalInformation::FromVector);

m_info->addDeclaredFunction(FunctionSpaceIndex(global.initialBits.initialBitsOrImportNumber));

}

m_info->globals.append(WTF::move(global));

}

return { };

{

uint32_t exportCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(exportCount), "can't get Export section's count"_s);

WASM_PARSER_FAIL_IF(exportCount > maxExports, "Export section's count is too big "_s, exportCount, " maximum "_s, maxExports);

RELEASE_ASSERT(!m_info->exports.capacity());

WASM_ALLOCATOR_FAIL_IF(!m_info->exports.tryReserveInitialCapacity(exportCount), "can't allocate enough memory for "_s, exportCount, " exports"_s);

UncheckedKeyHashSet<String> exportNames;

for (uint32_t exportNumber = 0; exportNumber < exportCount; ++exportNumber) {

uint32_t fieldLen;

Name fieldString;

ExternalKind kind;

unsigned kindIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(fieldLen), "can't get "_s, exportNumber, "th Export's field name length"_s);

WASM_ALLOCATOR_FAIL_IF(!consumeUTF8String(fieldString, fieldLen), "can't get "_s, exportNumber, "th Export's field name of length "_s, fieldLen);

String fieldName = WTF::makeString(fieldString);

WASM_PARSER_FAIL_IF(exportNames.contains(fieldName), "duplicate export: '"_s, fieldString, "'"_s);

exportNames.add(fieldName);

WASM_PARSER_FAIL_IF(!parseExternalKind(kind), "can't get "_s, exportNumber, "th Export's kind, named '"_s, fieldString, "'"_s);

WASM_PARSER_FAIL_IF(!parseVarUInt32(kindIndex), "can't get "_s, exportNumber, "th Export's kind index, named '"_s, fieldString, "'"_s);

switch (kind) {

case ExternalKind::Function: {

WASM_PARSER_FAIL_IF(kindIndex >= m_info->functionIndexSpaceSize(), exportNumber, "th Export has invalid function number "_s, kindIndex, " it exceeds the function index space "_s, m_info->functionIndexSpaceSize(), ", named '"_s, fieldString, "'"_s);

m_info->addDeclaredFunction(FunctionSpaceIndex(kindIndex));

break;

}

case ExternalKind::Table: {

WASM_PARSER_FAIL_IF(kindIndex >= m_info->tableCount(), "can't export Table "_s, kindIndex, " there are "_s, m_info->tableCount(), " Tables"_s);

break;

}

case ExternalKind::Memory: {

WASM_PARSER_FAIL_IF(kindIndex >= m_info->memoryCount(), "can't export Memory "_s, kindIndex, " there are "_s, m_info->memoryCount(), " Memories"_s);

break;

}

case ExternalKind::Global: {

WASM_PARSER_FAIL_IF(kindIndex >= m_info->globals.size(), exportNumber, "th Export has invalid global number "_s, kindIndex, " it exceeds the globals count "_s, m_info->globals.size(), ", named '"_s, fieldString, "'"_s);

// Only mutable globals need floating bindings.

GlobalInformation& global = m_info->globals[kindIndex];

if (global.mutability == Mutability::Mutable)

global.bindingMode = GlobalInformation::BindingMode::Portable;

break;

}

case ExternalKind::Exception: {

WASM_PARSER_FAIL_IF(kindIndex >= m_info->exceptionIndexSpaceSize(), exportNumber, "th Export has invalid exception number "_s, kindIndex, " it exceeds the exception index space "_s, m_info->exceptionIndexSpaceSize(), ", named '"_s, fieldString, "'"_s);

m_info->addDeclaredException(kindIndex);

break;

}

}

m_info->exports.append({ WTF::move(fieldString), kind, kindIndex });

}

return { };

{

uint32_t startFunctionIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(startFunctionIndex), "can't get Start index"_s);

WASM_PARSER_FAIL_IF(startFunctionIndex >= m_info->functionIndexSpaceSize(), "Start index "_s, startFunctionIndex, " exceeds function index space "_s, m_info->functionIndexSpaceSize());

TypeIndex typeIndex = m_info->typeIndexFromFunctionIndexSpace(FunctionSpaceIndex(startFunctionIndex));

auto signature = TypeInformation::tryGetFunctionSignature(typeIndex);

WASM_PARSER_FAIL_IF(!signature.has_value(), "can't get Start function signature"_s);

WASM_PARSER_FAIL_IF(signature.value()->argumentCount(), "Start function can't have arguments"_s);

WASM_PARSER_FAIL_IF(!signature.value()->returnsVoid(), "Start function can't return a value"_s);

m_info->startFunctionIndexSpace = startFunctionIndex;

return { };

{

uint32_t elementCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(elementCount), "can't get Element section's count"_s);

WASM_PARSER_FAIL_IF(elementCount > maxTableEntries, "Element section's count is too big "_s, elementCount, " maximum "_s, maxTableEntries);

RELEASE_ASSERT(!m_info->elements.capacity());

WASM_ALLOCATOR_FAIL_IF(!m_info->elements.tryReserveInitialCapacity(elementCount), "can't allocate memory for "_s, elementCount, " Elements"_s);

for (unsigned elementNum = 0; elementNum < elementCount; ++elementNum) {

uint32_t elementFlags;

WASM_PARSER_FAIL_IF(!parseVarUInt32(elementFlags), "can't get "_s, elementNum, "th Element reserved byte, which should be element flags"_s);

switch (elementFlags) {

case 0x00: {

constexpr uint32_t tableIndex = 0;

WASM_FAIL_IF_HELPER_FAILS(validateElementTableIdx(tableIndex, nonNullFuncrefType()));

std::optional<I32InitExpr> initExpr;

WASM_FAIL_IF_HELPER_FAILS(parseI32InitExprForElementSection(initExpr));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

ASSERT(!!m_info->tables[tableIndex]);

Element element(Element::Kind::Active, nonNullFuncrefType(), tableIndex, WTF::move(initExpr));

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfIndexes(element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x01: {

uint8_t elementKind;

WASM_FAIL_IF_HELPER_FAILS(parseElementKind(elementKind));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

Element element(Element::Kind::Passive, nonNullFuncrefType());

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfIndexes(element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x02: {

uint32_t tableIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(tableIndex), "can't get "_s, elementNum, "th Element table index"_s);

WASM_FAIL_IF_HELPER_FAILS(validateElementTableIdx(tableIndex, nonNullFuncrefType()));

std::optional<I32InitExpr> initExpr;

WASM_FAIL_IF_HELPER_FAILS(parseI32InitExprForElementSection(initExpr));

uint8_t elementKind;

WASM_FAIL_IF_HELPER_FAILS(parseElementKind(elementKind));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

ASSERT(!!m_info->tables[tableIndex]);

Element element(Element::Kind::Active, nonNullFuncrefType(), tableIndex, WTF::move(initExpr));

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfIndexes(element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x03: {

uint8_t elementKind;

WASM_FAIL_IF_HELPER_FAILS(parseElementKind(elementKind));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

Element element(Element::Kind::Declared, nonNullFuncrefType());

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfIndexes(element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x04: {

constexpr uint32_t tableIndex = 0;

WASM_FAIL_IF_HELPER_FAILS(validateElementTableIdx(tableIndex, funcrefType()));

std::optional<I32InitExpr> initExpr;

WASM_FAIL_IF_HELPER_FAILS(parseI32InitExprForElementSection(initExpr));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

ASSERT(!!m_info->tables[tableIndex]);

Element element(Element::Kind::Active, funcrefType(), tableIndex, WTF::move(initExpr));

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfExpressions(funcrefType(), element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x05: {

Type refType;

WASM_PARSER_FAIL_IF(!parseRefType(m_info, refType), "can't parse reftype in elem section"_s);

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

Element element(Element::Kind::Passive, refType);

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfExpressions(refType, element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x06: {

uint32_t tableIndex;

WASM_PARSER_FAIL_IF(!parseVarUInt32(tableIndex), "can't get "_s, elementNum, "th Element table index"_s);

std::optional<I32InitExpr> initExpr;

WASM_FAIL_IF_HELPER_FAILS(parseI32InitExprForElementSection(initExpr));

Type refType;

WASM_PARSER_FAIL_IF(!parseRefType(m_info, refType), "can't parse reftype in elem section"_s);

WASM_FAIL_IF_HELPER_FAILS(validateElementTableIdx(tableIndex, refType));

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

ASSERT(!!m_info->tables[tableIndex]);

Element element(Element::Kind::Active, refType, tableIndex, WTF::move(initExpr));

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfExpressions(refType, element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

case 0x07: {

Type refType;

WASM_PARSER_FAIL_IF(!parseRefType(m_info, refType), "can't parse reftype in elem section"_s);

uint32_t indexCount;

WASM_FAIL_IF_HELPER_FAILS(parseIndexCountForElementSection(indexCount, elementNum));

Element element(Element::Kind::Declared, refType);

WASM_ALLOCATOR_FAIL_IF(!element.initTypes.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_ALLOCATOR_FAIL_IF(!element.initialBitsOrIndices.tryReserveInitialCapacity(indexCount), "can't allocate memory for "_s, indexCount, " Element init_exprs"_s);

WASM_FAIL_IF_HELPER_FAILS(parseElementSegmentVectorOfExpressions(refType, element.initTypes, element.initialBitsOrIndices, indexCount, elementNum));

m_info->elements.append(WTF::move(element));

break;

}

default:

WASM_PARSER_FAIL_IF(true, "can't get "_s, elementNum, "th Element reserved byte"_s);

}

}

return { };

{

// The Code section is handled specially in StreamingParser.

RELEASE_ASSERT_NOT_REACHED();

return { };

{

size_t initialOffset = m_offset;

WASM_PARSER_FAIL_IF(!parseUInt8(opcode), "can't get init_expr's opcode"_s);

switch (opcode) {

case I32Const: {

int32_t constant;

WASM_PARSER_FAIL_IF(!parseVarInt32(constant), "can't get constant value for init_expr's i32.const"_s);

bitsOrImportNumber = static_cast<uint64_t>(constant);

resultType = Types::I32;

break;

}

case I64Const: {

int64_t constant;

WASM_PARSER_FAIL_IF(!parseVarInt64(constant), "can't get constant value for init_expr's i64.const"_s);

bitsOrImportNumber = constant;

resultType = Types::I64;

break;

}

case F32Const: {

uint32_t constant;

WASM_PARSER_FAIL_IF(!parseUInt32(constant), "can't get constant value for init_expr's f32.const"_s);

bitsOrImportNumber = constant;

resultType = Types::F32;

break;

}

case F64Const: {

uint64_t constant;

WASM_PARSER_FAIL_IF(!parseUInt64(constant), "can't get constant value for init_expr's f64.const"_s);

bitsOrImportNumber = constant;

resultType = Types::F64;

break;

}

#if ENABLE(B3_JIT)

case ExtSIMD: {

WASM_PARSER_FAIL_IF(!Options::useWasmSIMD(), "SIMD must be enabled"_s);

uint8_t simdOpcode;

WASM_PARSER_FAIL_IF(!parseUInt8(simdOpcode), "can't get init_expr's simd opcode"_s);

WASM_PARSER_FAIL_IF(static_cast<ExtSIMDOpType>(simdOpcode) != ExtSIMDOpType::V128Const, "unknown init_expr simd opcode "_s, opcode);

v128_t constant;

WASM_PARSER_FAIL_IF(!parseImmByteArray16(constant), "get constant value for init_expr's v128.const"_s);

vectorBits = constant;

resultType = Types::V128;

break;

}

#else

case ExtSIMD:

WASM_PARSER_FAIL_IF(true, "wasm-simd is not supported"_s);

(void) vectorBits;

break;

#endif

case GetGlobal: {

uint32_t index;

WASM_PARSER_FAIL_IF(!parseVarUInt32(index), "can't get get_global's index"_s);

WASM_PARSER_FAIL_IF(index >= m_info->globals.size(), "get_global's index "_s, index, " exceeds the number of globals "_s, m_info->globals.size());

WASM_PARSER_FAIL_IF(m_info->globals[index].mutability != Mutability::Immutable, "get_global import kind index "_s, index, " is mutable "_s);

resultType = m_info->globals[index].type;

bitsOrImportNumber = index;

break;

}

case RefNull: {

Type typeOfNull;

int32_t heapType;

WASM_PARSER_FAIL_IF(!parseHeapType(m_info, heapType), "ref.null heaptype must be funcref, externref or type_idx"_s);

if (isTypeIndexHeapType(heapType)) {

TypeIndex typeIndex = m_info->typeIndexFromTypeSignatureIndex(ModuleInformation::typeSignatureIndexFromHeapType(heapType));

typeOfNull = Type { TypeKind::RefNull, typeIndex };

} else

typeOfNull = Type { TypeKind::RefNull, static_cast<TypeIndex>(heapType) };

resultType = typeOfNull;

bitsOrImportNumber = JSValue::encode(jsNull());

break;

}

case RefFunc: {

uint32_t index;

WASM_PARSER_FAIL_IF(!parseVarUInt32(index), "can't get ref.func index"_s);

WASM_PARSER_FAIL_IF(index >= m_info->functionIndexSpaceSize(), "ref.func index "_s, index, " exceeds the number of functions "_s, m_info->functionIndexSpaceSize());

auto spaceIndex = FunctionSpaceIndex(index);

m_info->addReferencedFunction(spaceIndex);

TypeIndex typeIndex = m_info->typeIndexFromFunctionIndexSpace(spaceIndex);

resultType = { TypeKind::Ref, typeIndex };

bitsOrImportNumber = index;

break;

}

case ExtGC:

break;

default:

WASM_PARSER_FAIL_IF(true, "unknown init_expr opcode "_s, opcode);

}

uint8_t endOpcode;

// Don't consume the opcode byte unless it's an End so that the extended

// parsing mode below can consume it if needed.

WASM_PARSER_FAIL_IF(offset() >= source().size(), "can't get init_expr's end opcode"_s);

endOpcode = source()[offset()];

if (endOpcode == OpType::End && opcode != OpType::ExtGC) {

m_offset++;

isExtendedConstantExpression = false;

return { };

}

// If an End doesn't appear, we have to assume it's an extended constant expression

// and use the full Wasm expression parser to validate.

size_t initExprOffset;

WASM_FAIL_IF_HELPER_FAILS(parseExtendedConstExpr(source().subspan(initialOffset), initialOffset + m_offsetInSource, initExprOffset, m_info, expectedType));

m_offset += (initExprOffset - (m_offset - initialOffset));

WASM_PARSER_FAIL_IF(!m_info->constantExpressions.tryConstructAndAppend(source().subspan(initialOffset, initExprOffset)), "could not allocate memory for init expr"_s);

bitsOrImportNumber = m_info->constantExpressions.size() - 1;

isExtendedConstantExpression = true;

resultType = expectedType;

return { };

{

WASM_PARSER_FAIL_IF(tableIndex >= m_info->tableCount(), "Element section for Table "_s, tableIndex, " exceeds available Table "_s, m_info->tableCount());

WASM_PARSER_FAIL_IF(!isSubtype(type, m_info->tables[tableIndex].wasmType()), "Table "_s, tableIndex, " must have type '"_s, type, "' to have an element section"_s);

return { };

{

uint8_t initOpcode;

bool isExtendedConstantExpression;

uint64_t initExprBits;

Type initExprType;

v128_t unused;

WASM_FAIL_IF_HELPER_FAILS(parseInitExpr(initOpcode, isExtendedConstantExpression, initExprBits, unused, Types::I32, initExprType));

WASM_PARSER_FAIL_IF(!initExprType.isI32(), failMessage);

initExpr = makeI32InitExpr(initOpcode, isExtendedConstantExpression, initExprBits);

return { };

{

uint32_t argumentCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(argumentCount), "can't get Type's argument count at index "_s, position);

WASM_PARSER_FAIL_IF(argumentCount > maxFunctionParams, "argument count of Type at index "_s, position, " is too big "_s, argumentCount, " maximum "_s, maxFunctionParams);

Vector<Type, 16> argumentTypes;

WASM_ALLOCATOR_FAIL_IF(!argumentTypes.tryReserveInitialCapacity(argumentCount), "can't allocate enough memory for Type section's "_s, position, "th signature"_s);

argumentTypes.grow(argumentCount);

for (unsigned i = 0; i < argumentCount; ++i) {

Type argumentType;

WASM_PARSER_FAIL_IF(!parseValueType(m_info, argumentType), "can't get "_s, i, "th argument Type"_s);

argumentTypes[i] = argumentType;

}

uint32_t returnCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(returnCount), "can't get Type's return count at index "_s, position);

WASM_PARSER_FAIL_IF(returnCount > maxFunctionReturns, "return count of Type at index "_s, position, " is too big "_s, returnCount, " maximum "_s, maxFunctionReturns);

Vector<Type, 16> returnTypes;

WASM_ALLOCATOR_FAIL_IF(!returnTypes.tryReserveInitialCapacity(returnCount), "can't allocate enough memory for Type section's "_s, position, "th signature"_s);

returnTypes.grow(returnCount);

for (unsigned i = 0; i < returnCount; ++i) {

Type value;

WASM_PARSER_FAIL_IF(!parseValueType(m_info, value), "can't get "_s, i, "th Type's return value"_s);

returnTypes[i] = value;

}

functionSignature = TypeInformation::typeDefinitionForFunction(returnTypes, argumentTypes);

return { };

{

int8_t kind;

WASM_PARSER_FAIL_IF(!parseInt7(kind), "invalid type in struct field or array element"_s);

if (isValidPackedType(kind)) {

packedType = static_cast<PackedType>(kind);

return { };

}

return fail("expected a packed type but got "_s, kind);

{

int8_t kind;

WASM_PARSER_FAIL_IF(!peekInt7(kind), "invalid type in struct field or array element"_s);

if (isValidTypeKind(kind)) {

Type elementType;

WASM_PARSER_FAIL_IF(!parseValueType(m_info, elementType), "invalid type in struct field or array element"_s);

storageType = StorageType { elementType };

return { };

}

PackedType elementType;

WASM_PARSER_FAIL_IF(!parsePackedType(elementType), "invalid type in struct field or array element"_s);

storageType = StorageType { elementType };

return { };

{

uint32_t fieldCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(fieldCount), "can't get "_s, position, "th struct type's field count"_s);

WASM_PARSER_FAIL_IF(fieldCount > maxStructFieldCount, "number of fields for struct type at position "_s, position, " is too big "_s, fieldCount, " maximum "_s, maxStructFieldCount);

Vector<FieldType> fields;

WASM_ALLOCATOR_FAIL_IF(!fields.tryReserveInitialCapacity(fieldCount), "can't allocate enough memory for struct fields "_s, fieldCount, " entries"_s);

fields.grow(fieldCount);

Checked<unsigned, RecordOverflow> structInstancePayloadSize { 0 };

for (uint32_t fieldIndex = 0; fieldIndex < fieldCount; ++fieldIndex) {

StorageType fieldType;

WASM_PARSER_FAIL_IF(!parseStorageType(fieldType), "can't get "_s, fieldIndex, "th field Type"_s);

uint8_t mutability;

WASM_PARSER_FAIL_IF(!parseUInt8(mutability), position, "can't get "_s, fieldIndex, "th field mutability"_s);

WASM_PARSER_FAIL_IF(mutability != 0x0 && mutability != 0x1, "invalid Field's mutability: 0x"_s, hex(mutability, 2, Lowercase));

fields[fieldIndex] = FieldType { fieldType, static_cast<Mutability>(mutability) };

structInstancePayloadSize += typeSizeInBytes(fieldType);

WASM_PARSER_FAIL_IF(structInstancePayloadSize.hasOverflowed(), "struct layout is too big"_s);

}

m_info->m_hasGCObjectTypes = true;

structType = TypeInformation::typeDefinitionForStruct(fields);

return { };

{

StorageType elementType;

WASM_PARSER_FAIL_IF(!parseStorageType(elementType), "can't get array's element Type"_s);

uint8_t mutability;

WASM_PARSER_FAIL_IF(!parseUInt8(mutability), position, "can't get array's mutability"_s);

WASM_PARSER_FAIL_IF(mutability != 0x0 && mutability != 0x1, "invalid array mutability: 0x"_s, hex(mutability, 2, Lowercase));

m_info->m_hasGCObjectTypes = true;

arrayType = TypeInformation::typeDefinitionForArray(FieldType { elementType, static_cast<Mutability>(mutability) });

return { };

{

uint32_t typeCount;

WASM_PARSER_FAIL_IF(!parseVarUInt32(typeCount), "can't get "_s, position, "th recursion group's type count"_s);

WASM_PARSER_FAIL_IF(typeCount > maxRecursionGroupCount, "number of types for recursion group at position "_s, position, " is too big "_s, typeCount, " maximum "_s, maxRecursionGroupCount);

Vector<TypeIndex> types;

WASM_ALLOCATOR_FAIL_IF(!types.tryReserveInitialCapacity(typeCount), "can't allocate enough memory for recursion group "_s, typeCount, " entries"_s);

Vector<Ref<TypeDefinition>> signatures;

WASM_ALLOCATOR_FAIL_IF(!signatures.tryReserveInitialCapacity(typeCount), "can't allocate enough memory for recursion group "_s, typeCount, " entries"_s);

SetForScope<RecursionGroupInformation> recursionGroupInfo(m_recursionGroupInformation, RecursionGroupInformation { true, m_info->typeCount(), m_info->typeCount() + typeCount });

for (uint32_t i = 0; i < typeCount; ++i) {