| // Copyright 2015 the V8 project authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "src/wasm/wasm-module.h" |
| |
| #include <functional> |
| #include <memory> |
| |
| #include "src/api/api-inl.h" |
| #include "src/base/platform/wrappers.h" |
| #include "src/codegen/assembler-inl.h" |
| #include "src/compiler/wasm-compiler.h" |
| #include "src/debug/interface-types.h" |
| #include "src/execution/frames-inl.h" |
| #include "src/execution/simulator.h" |
| #include "src/init/v8.h" |
| #include "src/objects/js-array-inl.h" |
| #include "src/objects/objects.h" |
| #include "src/objects/property-descriptor.h" |
| #include "src/snapshot/snapshot.h" |
| #include "src/wasm/module-decoder.h" |
| #include "src/wasm/wasm-code-manager.h" |
| #include "src/wasm/wasm-js.h" |
| #include "src/wasm/wasm-objects-inl.h" |
| #include "src/wasm/wasm-result.h" |
| |
| namespace v8 { |
| namespace internal { |
| namespace wasm { |
| |
| // static |
| const uint32_t WasmElemSegment::kNullIndex; |
| |
| WireBytesRef LazilyGeneratedNames::LookupFunctionName( |
| const ModuleWireBytes& wire_bytes, uint32_t function_index, |
| Vector<const WasmExport> export_table) const { |
| base::MutexGuard lock(&mutex_); |
| if (!function_names_) { |
| function_names_.reset(new std::unordered_map<uint32_t, WireBytesRef>()); |
| DecodeFunctionNames(wire_bytes.start(), wire_bytes.end(), |
| function_names_.get(), export_table); |
| } |
| auto it = function_names_->find(function_index); |
| if (it == function_names_->end()) return WireBytesRef(); |
| return it->second; |
| } |
| |
| std::pair<WireBytesRef, WireBytesRef> |
| LazilyGeneratedNames::LookupNameFromImportsAndExports( |
| ImportExportKindCode kind, uint32_t index, |
| Vector<const WasmImport> import_table, |
| Vector<const WasmExport> export_table) const { |
| base::MutexGuard lock(&mutex_); |
| DCHECK(kind == kExternalGlobal || kind == kExternalMemory || |
| kind == kExternalTable); |
| auto& names = kind == kExternalGlobal |
| ? global_names_ |
| : kind == kExternalMemory ? memory_names_ : table_names_; |
| if (!names) { |
| names.reset( |
| new std::unordered_map<uint32_t, |
| std::pair<WireBytesRef, WireBytesRef>>()); |
| GenerateNamesFromImportsAndExports(kind, import_table, export_table, |
| names.get()); |
| } |
| auto it = names->find(index); |
| if (it == names->end()) return {}; |
| return it->second; |
| } |
| |
| // static |
| int MaxNumExportWrappers(const WasmModule* module) { |
| // For each signature there may exist a wrapper, both for imported and |
| // internal functions. |
| return static_cast<int>(module->signature_map.size()) * 2; |
| } |
| |
| // static |
| int GetExportWrapperIndex(const WasmModule* module, const FunctionSig* sig, |
| bool is_import) { |
| int result = module->signature_map.Find(*sig); |
| CHECK_GE(result, 0); |
| result += is_import ? module->signature_map.size() : 0; |
| return result; |
| } |
| |
| // static |
| int GetWasmFunctionOffset(const WasmModule* module, uint32_t func_index) { |
| const std::vector<WasmFunction>& functions = module->functions; |
| if (static_cast<uint32_t>(func_index) >= functions.size()) return -1; |
| DCHECK_GE(kMaxInt, functions[func_index].code.offset()); |
| return static_cast<int>(functions[func_index].code.offset()); |
| } |
| |
| // static |
| int GetNearestWasmFunction(const WasmModule* module, uint32_t byte_offset) { |
| const std::vector<WasmFunction>& functions = module->functions; |
| |
| // Binary search for a function containing the given position. |
| int left = 0; // inclusive |
| int right = static_cast<int>(functions.size()); // exclusive |
| if (right == 0) return -1; |
| while (right - left > 1) { |
| int mid = left + (right - left) / 2; |
| if (functions[mid].code.offset() <= byte_offset) { |
| left = mid; |
| } else { |
| right = mid; |
| } |
| } |
| |
| return left; |
| } |
| |
| // static |
| int GetContainingWasmFunction(const WasmModule* module, uint32_t byte_offset) { |
| int func_index = GetNearestWasmFunction(module, byte_offset); |
| |
| if (func_index >= 0) { |
| // If the found function does not contain the given position, return -1. |
| const WasmFunction& func = module->functions[func_index]; |
| if (byte_offset < func.code.offset() || |
| byte_offset >= func.code.end_offset()) { |
| return -1; |
| } |
| } |
| return func_index; |
| } |
| |
| void LazilyGeneratedNames::AddForTesting(int function_index, |
| WireBytesRef name) { |
| base::MutexGuard lock(&mutex_); |
| if (!function_names_) { |
| function_names_.reset(new std::unordered_map<uint32_t, WireBytesRef>()); |
| } |
| function_names_->insert(std::make_pair(function_index, name)); |
| } |
| |
| AsmJsOffsetInformation::AsmJsOffsetInformation( |
| Vector<const byte> encoded_offsets) {} |
| |
| AsmJsOffsetInformation::~AsmJsOffsetInformation() = default; |
| |
| int AsmJsOffsetInformation::GetSourcePosition(int declared_func_index, |
| int byte_offset, |
| bool is_at_number_conversion) { |
| EnsureDecodedOffsets(); |
| |
| DCHECK_LE(0, declared_func_index); |
| DCHECK_GT(decoded_offsets_->functions.size(), declared_func_index); |
| std::vector<AsmJsOffsetEntry>& function_offsets = |
| decoded_offsets_->functions[declared_func_index].entries; |
| |
| auto byte_offset_less = [](const AsmJsOffsetEntry& a, |
| const AsmJsOffsetEntry& b) { |
| return a.byte_offset < b.byte_offset; |
| }; |
| SLOW_DCHECK(std::is_sorted(function_offsets.begin(), function_offsets.end(), |
| byte_offset_less)); |
| auto it = |
| std::lower_bound(function_offsets.begin(), function_offsets.end(), |
| AsmJsOffsetEntry{byte_offset, 0, 0}, byte_offset_less); |
| DCHECK_NE(function_offsets.end(), it); |
| DCHECK_EQ(byte_offset, it->byte_offset); |
| return is_at_number_conversion ? it->source_position_number_conversion |
| : it->source_position_call; |
| } |
| |
| std::pair<int, int> AsmJsOffsetInformation::GetFunctionOffsets( |
| int declared_func_index) { |
| EnsureDecodedOffsets(); |
| |
| DCHECK_LE(0, declared_func_index); |
| DCHECK_GT(decoded_offsets_->functions.size(), declared_func_index); |
| AsmJsOffsetFunctionEntries& function_info = |
| decoded_offsets_->functions[declared_func_index]; |
| |
| return {function_info.start_offset, function_info.end_offset}; |
| } |
| |
| void AsmJsOffsetInformation::EnsureDecodedOffsets() { |
| base::MutexGuard mutex_guard(&mutex_); |
| DCHECK_EQ(encoded_offsets_ == nullptr, decoded_offsets_ != nullptr); |
| |
| if (decoded_offsets_) return; |
| AsmJsOffsetsResult result = |
| wasm::DecodeAsmJsOffsets(encoded_offsets_.as_vector()); |
| decoded_offsets_ = std::make_unique<AsmJsOffsets>(std::move(result).value()); |
| encoded_offsets_.ReleaseData(); |
| } |
| |
| // Get a string stored in the module bytes representing a name. |
| WasmName ModuleWireBytes::GetNameOrNull(WireBytesRef ref) const { |
| if (!ref.is_set()) return {nullptr, 0}; // no name. |
| DCHECK(BoundsCheck(ref)); |
| return WasmName::cast( |
| module_bytes_.SubVector(ref.offset(), ref.end_offset())); |
| } |
| |
| // Get a string stored in the module bytes representing a function name. |
| WasmName ModuleWireBytes::GetNameOrNull(const WasmFunction* function, |
| const WasmModule* module) const { |
| return GetNameOrNull(module->lazily_generated_names.LookupFunctionName( |
| *this, function->func_index, VectorOf(module->export_table))); |
| } |
| |
| std::ostream& operator<<(std::ostream& os, const WasmFunctionName& name) { |
| os << "#" << name.function_->func_index; |
| if (!name.name_.empty()) { |
| if (name.name_.begin()) { |
| os << ":"; |
| os.write(name.name_.begin(), name.name_.length()); |
| } |
| } else { |
| os << "?"; |
| } |
| return os; |
| } |
| |
| WasmModule::WasmModule(std::unique_ptr<Zone> signature_zone) |
| : signature_zone(std::move(signature_zone)) {} |
| |
| bool IsWasmCodegenAllowed(Isolate* isolate, Handle<Context> context) { |
| // TODO(wasm): Once wasm has its own CSP policy, we should introduce a |
| // separate callback that includes information about the module about to be |
| // compiled. For the time being, pass an empty string as placeholder for the |
| // sources. |
| if (auto wasm_codegen_callback = isolate->allow_wasm_code_gen_callback()) { |
| return wasm_codegen_callback( |
| v8::Utils::ToLocal(context), |
| v8::Utils::ToLocal(isolate->factory()->empty_string())); |
| } |
| auto codegen_callback = isolate->allow_code_gen_callback(); |
| return codegen_callback == nullptr || |
| codegen_callback( |
| v8::Utils::ToLocal(context), |
| v8::Utils::ToLocal(isolate->factory()->empty_string())); |
| } |
| |
| namespace { |
| |
| // Converts the given {type} into a string representation that can be used in |
| // reflective functions. Should be kept in sync with the {GetValueType} helper. |
| Handle<String> ToValueTypeString(Isolate* isolate, ValueType type) { |
| return isolate->factory()->InternalizeUtf8String( |
| type == kWasmFuncRef ? CStrVector("anyfunc") : VectorOf(type.name())); |
| } |
| } // namespace |
| |
| Handle<JSObject> GetTypeForFunction(Isolate* isolate, const FunctionSig* sig) { |
| Factory* factory = isolate->factory(); |
| |
| // Extract values for the {ValueType[]} arrays. |
| int param_index = 0; |
| int param_count = static_cast<int>(sig->parameter_count()); |
| Handle<FixedArray> param_values = factory->NewFixedArray(param_count); |
| for (ValueType type : sig->parameters()) { |
| Handle<String> type_value = ToValueTypeString(isolate, type); |
| param_values->set(param_index++, *type_value); |
| } |
| int result_index = 0; |
| int result_count = static_cast<int>(sig->return_count()); |
| Handle<FixedArray> result_values = factory->NewFixedArray(result_count); |
| for (ValueType type : sig->returns()) { |
| Handle<String> type_value = ToValueTypeString(isolate, type); |
| result_values->set(result_index++, *type_value); |
| } |
| |
| // Create the resulting {FunctionType} object. |
| Handle<JSFunction> object_function = isolate->object_function(); |
| Handle<JSObject> object = factory->NewJSObject(object_function); |
| Handle<JSArray> params = factory->NewJSArrayWithElements(param_values); |
| Handle<JSArray> results = factory->NewJSArrayWithElements(result_values); |
| Handle<String> params_string = factory->InternalizeUtf8String("parameters"); |
| Handle<String> results_string = factory->InternalizeUtf8String("results"); |
| JSObject::AddProperty(isolate, object, params_string, params, NONE); |
| JSObject::AddProperty(isolate, object, results_string, results, NONE); |
| |
| return object; |
| } |
| |
| Handle<JSObject> GetTypeForGlobal(Isolate* isolate, bool is_mutable, |
| ValueType type) { |
| Factory* factory = isolate->factory(); |
| |
| Handle<JSFunction> object_function = isolate->object_function(); |
| Handle<JSObject> object = factory->NewJSObject(object_function); |
| Handle<String> mutable_string = factory->InternalizeUtf8String("mutable"); |
| Handle<String> value_string = factory->InternalizeUtf8String("value"); |
| JSObject::AddProperty(isolate, object, mutable_string, |
| factory->ToBoolean(is_mutable), NONE); |
| JSObject::AddProperty(isolate, object, value_string, |
| ToValueTypeString(isolate, type), NONE); |
| |
| return object; |
| } |
| |
| Handle<JSObject> GetTypeForMemory(Isolate* isolate, uint32_t min_size, |
| base::Optional<uint32_t> max_size) { |
| Factory* factory = isolate->factory(); |
| |
| Handle<JSFunction> object_function = isolate->object_function(); |
| Handle<JSObject> object = factory->NewJSObject(object_function); |
| Handle<String> minimum_string = factory->InternalizeUtf8String("minimum"); |
| Handle<String> maximum_string = factory->InternalizeUtf8String("maximum"); |
| JSObject::AddProperty(isolate, object, minimum_string, |
| factory->NewNumberFromUint(min_size), NONE); |
| if (max_size.has_value()) { |
| JSObject::AddProperty(isolate, object, maximum_string, |
| factory->NewNumberFromUint(max_size.value()), NONE); |
| } |
| |
| return object; |
| } |
| |
| Handle<JSObject> GetTypeForTable(Isolate* isolate, ValueType type, |
| uint32_t min_size, |
| base::Optional<uint32_t> max_size) { |
| Factory* factory = isolate->factory(); |
| |
| Handle<String> element; |
| if (type.is_reference_to(HeapType::kFunc)) { |
| // TODO(wasm): We should define the "anyfunc" string in one central |
| // place and then use that constant everywhere. |
| element = factory->InternalizeUtf8String("anyfunc"); |
| } else { |
| element = factory->InternalizeUtf8String(VectorOf(type.name())); |
| } |
| |
| Handle<JSFunction> object_function = isolate->object_function(); |
| Handle<JSObject> object = factory->NewJSObject(object_function); |
| Handle<String> element_string = factory->InternalizeUtf8String("element"); |
| Handle<String> minimum_string = factory->InternalizeUtf8String("minimum"); |
| Handle<String> maximum_string = factory->InternalizeUtf8String("maximum"); |
| JSObject::AddProperty(isolate, object, element_string, element, NONE); |
| JSObject::AddProperty(isolate, object, minimum_string, |
| factory->NewNumberFromUint(min_size), NONE); |
| if (max_size.has_value()) { |
| JSObject::AddProperty(isolate, object, maximum_string, |
| factory->NewNumberFromUint(max_size.value()), NONE); |
| } |
| |
| return object; |
| } |
| |
| Handle<JSArray> GetImports(Isolate* isolate, |
| Handle<WasmModuleObject> module_object) { |
| auto enabled_features = i::wasm::WasmFeatures::FromIsolate(isolate); |
| Factory* factory = isolate->factory(); |
| |
| Handle<String> module_string = factory->InternalizeUtf8String("module"); |
| Handle<String> name_string = factory->InternalizeUtf8String("name"); |
| Handle<String> kind_string = factory->InternalizeUtf8String("kind"); |
| Handle<String> type_string = factory->InternalizeUtf8String("type"); |
| |
| Handle<String> function_string = factory->InternalizeUtf8String("function"); |
| Handle<String> table_string = factory->InternalizeUtf8String("table"); |
| Handle<String> memory_string = factory->InternalizeUtf8String("memory"); |
| Handle<String> global_string = factory->InternalizeUtf8String("global"); |
| Handle<String> exception_string = factory->InternalizeUtf8String("exception"); |
| |
| // Create the result array. |
| const WasmModule* module = module_object->module(); |
| int num_imports = static_cast<int>(module->import_table.size()); |
| Handle<JSArray> array_object = factory->NewJSArray(PACKED_ELEMENTS, 0, 0); |
| Handle<FixedArray> storage = factory->NewFixedArray(num_imports); |
| JSArray::SetContent(array_object, storage); |
| array_object->set_length(Smi::FromInt(num_imports)); |
| |
| Handle<JSFunction> object_function = |
| Handle<JSFunction>(isolate->native_context()->object_function(), isolate); |
| |
| // Populate the result array. |
| for (int index = 0; index < num_imports; ++index) { |
| const WasmImport& import = module->import_table[index]; |
| |
| Handle<JSObject> entry = factory->NewJSObject(object_function); |
| |
| Handle<String> import_kind; |
| Handle<JSObject> type_value; |
| switch (import.kind) { |
| case kExternalFunction: |
| if (enabled_features.has_type_reflection()) { |
| auto& func = module->functions[import.index]; |
| type_value = GetTypeForFunction(isolate, func.sig); |
| } |
| import_kind = function_string; |
| break; |
| case kExternalTable: |
| if (enabled_features.has_type_reflection()) { |
| auto& table = module->tables[import.index]; |
| base::Optional<uint32_t> maximum_size; |
| if (table.has_maximum_size) maximum_size.emplace(table.maximum_size); |
| type_value = GetTypeForTable(isolate, table.type, table.initial_size, |
| maximum_size); |
| } |
| import_kind = table_string; |
| break; |
| case kExternalMemory: |
| if (enabled_features.has_type_reflection()) { |
| DCHECK_EQ(0, import.index); // Only one memory supported. |
| base::Optional<uint32_t> maximum_size; |
| if (module->has_maximum_pages) { |
| maximum_size.emplace(module->maximum_pages); |
| } |
| type_value = |
| GetTypeForMemory(isolate, module->initial_pages, maximum_size); |
| } |
| import_kind = memory_string; |
| break; |
| case kExternalGlobal: |
| if (enabled_features.has_type_reflection()) { |
| auto& global = module->globals[import.index]; |
| type_value = |
| GetTypeForGlobal(isolate, global.mutability, global.type); |
| } |
| import_kind = global_string; |
| break; |
| case kExternalException: |
| import_kind = exception_string; |
| break; |
| } |
| DCHECK(!import_kind->is_null()); |
| |
| Handle<String> import_module = |
| WasmModuleObject::ExtractUtf8StringFromModuleBytes( |
| isolate, module_object, import.module_name, kInternalize); |
| |
| Handle<String> import_name = |
| WasmModuleObject::ExtractUtf8StringFromModuleBytes( |
| isolate, module_object, import.field_name, kInternalize); |
| |
| JSObject::AddProperty(isolate, entry, module_string, import_module, NONE); |
| JSObject::AddProperty(isolate, entry, name_string, import_name, NONE); |
| JSObject::AddProperty(isolate, entry, kind_string, import_kind, NONE); |
| if (!type_value.is_null()) { |
| JSObject::AddProperty(isolate, entry, type_string, type_value, NONE); |
| } |
| |
| storage->set(index, *entry); |
| } |
| |
| return array_object; |
| } |
| |
| Handle<JSArray> GetExports(Isolate* isolate, |
| Handle<WasmModuleObject> module_object) { |
| auto enabled_features = i::wasm::WasmFeatures::FromIsolate(isolate); |
| Factory* factory = isolate->factory(); |
| |
| Handle<String> name_string = factory->InternalizeUtf8String("name"); |
| Handle<String> kind_string = factory->InternalizeUtf8String("kind"); |
| Handle<String> type_string = factory->InternalizeUtf8String("type"); |
| |
| Handle<String> function_string = factory->InternalizeUtf8String("function"); |
| Handle<String> table_string = factory->InternalizeUtf8String("table"); |
| Handle<String> memory_string = factory->InternalizeUtf8String("memory"); |
| Handle<String> global_string = factory->InternalizeUtf8String("global"); |
| Handle<String> exception_string = factory->InternalizeUtf8String("exception"); |
| |
| // Create the result array. |
| const WasmModule* module = module_object->module(); |
| int num_exports = static_cast<int>(module->export_table.size()); |
| Handle<JSArray> array_object = factory->NewJSArray(PACKED_ELEMENTS, 0, 0); |
| Handle<FixedArray> storage = factory->NewFixedArray(num_exports); |
| JSArray::SetContent(array_object, storage); |
| array_object->set_length(Smi::FromInt(num_exports)); |
| |
| Handle<JSFunction> object_function = |
| Handle<JSFunction>(isolate->native_context()->object_function(), isolate); |
| |
| // Populate the result array. |
| for (int index = 0; index < num_exports; ++index) { |
| const WasmExport& exp = module->export_table[index]; |
| |
| Handle<String> export_kind; |
| Handle<JSObject> type_value; |
| switch (exp.kind) { |
| case kExternalFunction: |
| if (enabled_features.has_type_reflection()) { |
| auto& func = module->functions[exp.index]; |
| type_value = GetTypeForFunction(isolate, func.sig); |
| } |
| export_kind = function_string; |
| break; |
| case kExternalTable: |
| if (enabled_features.has_type_reflection()) { |
| auto& table = module->tables[exp.index]; |
| base::Optional<uint32_t> maximum_size; |
| if (table.has_maximum_size) maximum_size.emplace(table.maximum_size); |
| type_value = GetTypeForTable(isolate, table.type, table.initial_size, |
| maximum_size); |
| } |
| export_kind = table_string; |
| break; |
| case kExternalMemory: |
| if (enabled_features.has_type_reflection()) { |
| DCHECK_EQ(0, exp.index); // Only one memory supported. |
| base::Optional<uint32_t> maximum_size; |
| if (module->has_maximum_pages) { |
| maximum_size.emplace(module->maximum_pages); |
| } |
| type_value = |
| GetTypeForMemory(isolate, module->initial_pages, maximum_size); |
| } |
| export_kind = memory_string; |
| break; |
| case kExternalGlobal: |
| if (enabled_features.has_type_reflection()) { |
| auto& global = module->globals[exp.index]; |
| type_value = |
| GetTypeForGlobal(isolate, global.mutability, global.type); |
| } |
| export_kind = global_string; |
| break; |
| case kExternalException: |
| export_kind = exception_string; |
| break; |
| default: |
| UNREACHABLE(); |
| } |
| |
| Handle<JSObject> entry = factory->NewJSObject(object_function); |
| |
| Handle<String> export_name = |
| WasmModuleObject::ExtractUtf8StringFromModuleBytes( |
| isolate, module_object, exp.name, kNoInternalize); |
| |
| JSObject::AddProperty(isolate, entry, name_string, export_name, NONE); |
| JSObject::AddProperty(isolate, entry, kind_string, export_kind, NONE); |
| if (!type_value.is_null()) { |
| JSObject::AddProperty(isolate, entry, type_string, type_value, NONE); |
| } |
| |
| storage->set(index, *entry); |
| } |
| |
| return array_object; |
| } |
| |
| Handle<JSArray> GetCustomSections(Isolate* isolate, |
| Handle<WasmModuleObject> module_object, |
| Handle<String> name, ErrorThrower* thrower) { |
| Factory* factory = isolate->factory(); |
| |
| Vector<const uint8_t> wire_bytes = |
| module_object->native_module()->wire_bytes(); |
| std::vector<CustomSectionOffset> custom_sections = |
| DecodeCustomSections(wire_bytes.begin(), wire_bytes.end()); |
| |
| std::vector<Handle<Object>> matching_sections; |
| |
| // Gather matching sections. |
| for (auto& section : custom_sections) { |
| Handle<String> section_name = |
| WasmModuleObject::ExtractUtf8StringFromModuleBytes( |
| isolate, module_object, section.name, kNoInternalize); |
| |
| if (!name->Equals(*section_name)) continue; |
| |
| // Make a copy of the payload data in the section. |
| size_t size = section.payload.length(); |
| MaybeHandle<JSArrayBuffer> result = |
| isolate->factory()->NewJSArrayBufferAndBackingStore( |
| size, InitializedFlag::kUninitialized); |
| Handle<JSArrayBuffer> array_buffer; |
| if (!result.ToHandle(&array_buffer)) { |
| thrower->RangeError("out of memory allocating custom section data"); |
| return Handle<JSArray>(); |
| } |
| memcpy(array_buffer->backing_store(), |
| wire_bytes.begin() + section.payload.offset(), |
| section.payload.length()); |
| |
| matching_sections.push_back(array_buffer); |
| } |
| |
| int num_custom_sections = static_cast<int>(matching_sections.size()); |
| Handle<JSArray> array_object = factory->NewJSArray(PACKED_ELEMENTS, 0, 0); |
| Handle<FixedArray> storage = factory->NewFixedArray(num_custom_sections); |
| JSArray::SetContent(array_object, storage); |
| array_object->set_length(Smi::FromInt(num_custom_sections)); |
| |
| for (int i = 0; i < num_custom_sections; i++) { |
| storage->set(i, *matching_sections[i]); |
| } |
| |
| return array_object; |
| } |
| |
| // Get the source position from a given function index and byte offset, |
| // for either asm.js or pure Wasm modules. |
| int GetSourcePosition(const WasmModule* module, uint32_t func_index, |
| uint32_t byte_offset, bool is_at_number_conversion) { |
| DCHECK_EQ(is_asmjs_module(module), |
| module->asm_js_offset_information != nullptr); |
| if (!is_asmjs_module(module)) { |
| // For non-asm.js modules, we just add the function's start offset |
| // to make a module-relative position. |
| return byte_offset + GetWasmFunctionOffset(module, func_index); |
| } |
| |
| // asm.js modules have an additional offset table that must be searched. |
| return module->asm_js_offset_information->GetSourcePosition( |
| declared_function_index(module, func_index), byte_offset, |
| is_at_number_conversion); |
| } |
| |
| namespace { |
| template <typename T> |
| inline size_t VectorSize(const std::vector<T>& vector) { |
| return sizeof(T) * vector.size(); |
| } |
| } // namespace |
| |
| size_t EstimateStoredSize(const WasmModule* module) { |
| return sizeof(WasmModule) + VectorSize(module->globals) + |
| (module->signature_zone ? module->signature_zone->allocation_size() |
| : 0) + |
| VectorSize(module->types) + VectorSize(module->type_kinds) + |
| VectorSize(module->canonicalized_type_ids) + |
| VectorSize(module->functions) + VectorSize(module->data_segments) + |
| VectorSize(module->tables) + VectorSize(module->import_table) + |
| VectorSize(module->export_table) + VectorSize(module->exceptions) + |
| VectorSize(module->elem_segments); |
| } |
| |
| size_t PrintSignature(Vector<char> buffer, const wasm::FunctionSig* sig, |
| char delimiter) { |
| if (buffer.empty()) return 0; |
| size_t old_size = buffer.size(); |
| auto append_char = [&buffer](char c) { |
| if (buffer.size() == 1) return; // Keep last character for '\0'. |
| buffer[0] = c; |
| buffer += 1; |
| }; |
| for (wasm::ValueType t : sig->parameters()) { |
| append_char(t.short_name()); |
| } |
| append_char(delimiter); |
| for (wasm::ValueType t : sig->returns()) { |
| append_char(t.short_name()); |
| } |
| buffer[0] = '\0'; |
| return old_size - buffer.size(); |
| } |
| |
| } // namespace wasm |
| } // namespace internal |
| } // namespace v8 |
