void WASMModuleParser::parseExportSection()
{
WASMExportFormat exportFormat;
READ_EXPORT_FORMAT_OR_FAIL(exportFormat, "Cannot read the export format.");
switch (exportFormat) {
case WASMExportFormat::Default: {
uint32_t functionIndex;
READ_COMPACT_UINT32_OR_FAIL(functionIndex, "Cannot read the function index.");
FAIL_IF_FALSE(functionIndex < m_module->functionDeclarations().size(), "The function index is incorrect.");
// FIXME: Export the function.
break;
}
case WASMExportFormat::Record: {
uint32_t numberOfExports;
READ_COMPACT_UINT32_OR_FAIL(numberOfExports, "Cannot read the number of exports.");
for (uint32_t exportIndex = 0; exportIndex < numberOfExports; ++exportIndex) {
String exportName;
READ_STRING_OR_FAIL(exportName, "Cannot read the function export name.");
// FIXME: Check that exportName is legal.
uint32_t functionIndex;
READ_COMPACT_UINT32_OR_FAIL(functionIndex, "Cannot read the function index.");
FAIL_IF_FALSE(functionIndex < m_module->functionDeclarations().size(), "The function index is incorrect.");
// FIXME: Export the function.
}
break;
}
default:
ASSERT_NOT_REACHED();
}
}
void WASMModuleParser::parseFunctionImportSection()
{
uint32_t numberOfFunctionImports;
uint32_t numberOfFunctionImportSignatures;
READ_COMPACT_UINT32_OR_FAIL(numberOfFunctionImports, "Cannot read the number of function imports.");
READ_COMPACT_UINT32_OR_FAIL(numberOfFunctionImportSignatures, "Cannot read the number of function import signatures.");
m_module->functionImports().reserveInitialCapacity(numberOfFunctionImports);
m_module->functionImportSignatures().reserveInitialCapacity(numberOfFunctionImportSignatures);
for (uint32_t functionImportIndex = 0; functionImportIndex < numberOfFunctionImports; ++functionImportIndex) {
WASMFunctionImport functionImport;
READ_STRING_OR_FAIL(functionImport.functionName, "Cannot read the function import name.");
m_module->functionImports().uncheckedAppend(functionImport);
uint32_t numberOfSignatures;
READ_COMPACT_UINT32_OR_FAIL(numberOfSignatures, "Cannot read the number of signatures.");
FAIL_IF_FALSE(numberOfSignatures <= numberOfFunctionImportSignatures - m_module->functionImportSignatures().size(), "The number of signatures is incorrect.");
for (uint32_t i = 0; i < numberOfSignatures; ++i) {
WASMFunctionImportSignature functionImportSignature;
READ_COMPACT_UINT32_OR_FAIL(functionImportSignature.signatureIndex, "Cannot read the signature index.");
FAIL_IF_FALSE(functionImportSignature.signatureIndex < m_module->signatures().size(), "The signature index is incorrect.");
functionImportSignature.functionImportIndex = functionImportIndex;
m_module->functionImportSignatures().uncheckedAppend(functionImportSignature);
}
}
FAIL_IF_FALSE(m_module->functionImportSignatures().size() == numberOfFunctionImportSignatures, "The number of function import signatures is incorrect.");
}
void WASMModuleParser::parseGlobalSection()
{
uint32_t numberOfInternalI32GlobalVariables;
uint32_t numberOfInternalF32GlobalVariables;
uint32_t numberOfInternalF64GlobalVariables;
uint32_t numberOfImportedI32GlobalVariables;
uint32_t numberOfImportedF32GlobalVariables;
uint32_t numberOfImportedF64GlobalVariables;
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalI32GlobalVariables, "Cannot read the number of internal int32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalF32GlobalVariables, "Cannot read the number of internal float32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalF64GlobalVariables, "Cannot read the number of internal float64 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedI32GlobalVariables, "Cannot read the number of imported int32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedF32GlobalVariables, "Cannot read the number of imported float32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedF64GlobalVariables, "Cannot read the number of imported float64 global variables.");
uint32_t numberOfGlobalVariables = numberOfInternalI32GlobalVariables + numberOfInternalF32GlobalVariables + numberOfInternalF64GlobalVariables +
numberOfImportedI32GlobalVariables + numberOfImportedF32GlobalVariables + numberOfImportedF64GlobalVariables;
Vector<WASMType>& globalVariableTypes = m_module->globalVariableTypes();
globalVariableTypes.reserveInitialCapacity(numberOfGlobalVariables);
for (uint32_t i = 0; i < numberOfInternalI32GlobalVariables; ++i)
globalVariableTypes.uncheckedAppend(WASMType::I32);
for (uint32_t i = 0; i < numberOfInternalF32GlobalVariables; ++i)
globalVariableTypes.uncheckedAppend(WASMType::F32);
for (uint32_t i = 0; i < numberOfInternalF64GlobalVariables; ++i)
globalVariableTypes.uncheckedAppend(WASMType::F64);
for (uint32_t i = 0; i < numberOfImportedI32GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of an int32 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::I32);
}
for (uint32_t i = 0; i < numberOfImportedF32GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of a float32 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::F32);
}
for (uint32_t i = 0; i < numberOfImportedF64GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of a float64 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::F64);
}
}
void WASMModuleParser::parseFunctionImportSection(ExecState* exec)
{
uint32_t numberOfFunctionImports;
uint32_t numberOfFunctionImportSignatures;
READ_COMPACT_UINT32_OR_FAIL(numberOfFunctionImports, "Cannot read the number of function imports.");
READ_COMPACT_UINT32_OR_FAIL(numberOfFunctionImportSignatures, "Cannot read the number of function import signatures.");
m_module->functionImports().reserveInitialCapacity(numberOfFunctionImports);
m_module->functionImportSignatures().reserveInitialCapacity(numberOfFunctionImportSignatures);
m_module->importedFunctions().reserveInitialCapacity(numberOfFunctionImports);
for (uint32_t functionImportIndex = 0; functionImportIndex < numberOfFunctionImports; ++functionImportIndex) {
WASMFunctionImport functionImport;
READ_STRING_OR_FAIL(functionImport.functionName, "Cannot read the function import name.");
m_module->functionImports().uncheckedAppend(functionImport);
uint32_t numberOfSignatures;
READ_COMPACT_UINT32_OR_FAIL(numberOfSignatures, "Cannot read the number of signatures.");
FAIL_IF_FALSE(numberOfSignatures <= numberOfFunctionImportSignatures - m_module->functionImportSignatures().size(), "The number of signatures is incorrect.");
for (uint32_t i = 0; i < numberOfSignatures; ++i) {
WASMFunctionImportSignature functionImportSignature;
READ_COMPACT_UINT32_OR_FAIL(functionImportSignature.signatureIndex, "Cannot read the signature index.");
FAIL_IF_FALSE(functionImportSignature.signatureIndex < m_module->signatures().size(), "The signature index is incorrect.");
functionImportSignature.functionImportIndex = functionImportIndex;
m_module->functionImportSignatures().uncheckedAppend(functionImportSignature);
}
JSValue value;
getImportedValue(exec, functionImport.functionName, value);
PROPAGATE_ERROR();
FAIL_IF_FALSE(value.isFunction(), "\"" + functionImport.functionName + "\" is not a function.");
JSFunction* function = jsCast<JSFunction*>(value.asCell());
m_module->importedFunctions().uncheckedAppend(WriteBarrier<JSFunction>(m_vm, m_module.get(), function));
}
FAIL_IF_FALSE(m_module->functionImportSignatures().size() == numberOfFunctionImportSignatures, "The number of function import signatures is incorrect.");
}
void WASMModuleParser::parseGlobalSection(ExecState* exec)
{
uint32_t numberOfInternalI32GlobalVariables;
uint32_t numberOfInternalF32GlobalVariables;
uint32_t numberOfInternalF64GlobalVariables;
uint32_t numberOfImportedI32GlobalVariables;
uint32_t numberOfImportedF32GlobalVariables;
uint32_t numberOfImportedF64GlobalVariables;
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalI32GlobalVariables, "Cannot read the number of internal int32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalF32GlobalVariables, "Cannot read the number of internal float32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfInternalF64GlobalVariables, "Cannot read the number of internal float64 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedI32GlobalVariables, "Cannot read the number of imported int32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedF32GlobalVariables, "Cannot read the number of imported float32 global variables.");
READ_COMPACT_UINT32_OR_FAIL(numberOfImportedF64GlobalVariables, "Cannot read the number of imported float64 global variables.");
uint32_t numberOfGlobalVariables = numberOfInternalI32GlobalVariables + numberOfInternalF32GlobalVariables + numberOfInternalF64GlobalVariables +
numberOfImportedI32GlobalVariables + numberOfImportedF32GlobalVariables + numberOfImportedF64GlobalVariables;
Vector<WASMType>& globalVariableTypes = m_module->globalVariableTypes();
globalVariableTypes.reserveInitialCapacity(numberOfGlobalVariables);
Vector<JSWASMModule::GlobalVariable>& globalVariables = m_module->globalVariables();
globalVariables.reserveInitialCapacity(numberOfGlobalVariables);
for (uint32_t i = 0; i < numberOfInternalI32GlobalVariables; ++i) {
globalVariableTypes.uncheckedAppend(WASMType::I32);
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(0));
}
for (uint32_t i = 0; i < numberOfInternalF32GlobalVariables; ++i) {
globalVariableTypes.uncheckedAppend(WASMType::F32);
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(0.0f));
}
for (uint32_t i = 0; i < numberOfInternalF64GlobalVariables; ++i) {
globalVariableTypes.uncheckedAppend(WASMType::F64);
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(0.0));
}
for (uint32_t i = 0; i < numberOfImportedI32GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of an int32 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::I32);
JSValue value;
getImportedValue(exec, importName, value);
PROPAGATE_ERROR();
FAIL_IF_FALSE(value.isPrimitive() && !value.isSymbol(), "\"" + importName + "\" is not a primitive or is a Symbol.");
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(value.toInt32(exec)));
}
for (uint32_t i = 0; i < numberOfImportedF32GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of a float32 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::F32);
JSValue value;
getImportedValue(exec, importName, value);
PROPAGATE_ERROR();
FAIL_IF_FALSE(value.isPrimitive() && !value.isSymbol(), "\"" + importName + "\" is not a primitive or is a Symbol.");
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(static_cast<float>(value.toNumber(exec))));
}
for (uint32_t i = 0; i < numberOfImportedF64GlobalVariables; ++i) {
String importName;
READ_STRING_OR_FAIL(importName, "Cannot read the import name of a float64 global variable.");
globalVariableTypes.uncheckedAppend(WASMType::F64);
JSValue value;
getImportedValue(exec, importName, value);
PROPAGATE_ERROR();
FAIL_IF_FALSE(value.isPrimitive() && !value.isSymbol(), "\"" + importName + "\" is not a primitive or is a Symbol.");
globalVariables.uncheckedAppend(JSWASMModule::GlobalVariable(value.toNumber(exec)));
}
}