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chromium / v8 / v8 / da7322c05fa13939ae7a8f1e33e8995987924df6 / . / src / wasm / c-api.cc
blob: 18ab23dcce35ea9ef7d217c50e5788c4a4c13ac5 [file] [log] [blame]
// Copyright 2019 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.
// This implementation is originally from
// https://github.com/WebAssembly/wasm-c-api/:
// Copyright 2019 Andreas Rossberg
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <cstring>
#include <iostream>
#include "third_party/wasm-api/wasm.h"
#include "third_party/wasm-api/wasm.hh"
#include "include/libplatform/libplatform.h"
#include "include/v8.h"
#include "src/api-inl.h"
#include "src/wasm/leb-helper.h"
#include "src/wasm/wasm-constants.h"
#include "src/wasm/wasm-objects.h"
#include "src/wasm/wasm-serialization.h"
// BEGIN FILE wasm-bin.cc
namespace wasm {
namespace bin {
////////////////////////////////////////////////////////////////////////////////
// Encoding
void encode_header(char*& ptr) {
std::memcpy(ptr,
"\x00"
"asm\x01\x00\x00\x00",
8);
ptr += 8;
}
void encode_size32(char*& ptr, size_t n) {
assert(n <= 0xffffffff);
for (int i = 0; i < 5; ++i) {
*ptr++ = (n & 0x7f) | (i == 4 ? 0x00 : 0x80);
n = n >> 7;
}
}
void encode_valtype(char*& ptr, const ValType* type) {
switch (type->kind()) {
case I32:
*ptr++ = 0x7f;
break;
case I64:
*ptr++ = 0x7e;
break;
case F32:
*ptr++ = 0x7d;
break;
case F64:
*ptr++ = 0x7c;
break;
case FUNCREF:
*ptr++ = 0x70;
break;
case ANYREF:
*ptr++ = 0x6f;
break;
default:
UNREACHABLE();
}
}
auto zero_size(const ValType* type) -> size_t {
switch (type->kind()) {
case I32:
return 1;
case I64:
return 1;
case F32:
return 4;
case F64:
return 8;
case FUNCREF:
return 0;
case ANYREF:
return 0;
default:
UNREACHABLE();
}
}
void encode_const_zero(char*& ptr, const ValType* type) {
switch (type->kind()) {
case I32:
*ptr++ = 0x41;
break;
case I64:
*ptr++ = 0x42;
break;
case F32:
*ptr++ = 0x43;
break;
case F64:
*ptr++ = 0x44;
break;
default:
UNREACHABLE();
}
for (size_t i = 0; i < zero_size(type); ++i) *ptr++ = 0;
}
auto wrapper(const FuncType* type) -> vec<byte_t> {
auto in_arity = type->params().size();
auto out_arity = type->results().size();
auto size = 39 + in_arity + out_arity;
auto binary = vec<byte_t>::make_uninitialized(size);
auto ptr = binary.get();
encode_header(ptr);
*ptr++ = i::wasm::kTypeSectionCode;
encode_size32(ptr, 12 + in_arity + out_arity); // size
*ptr++ = 1; // length
*ptr++ = i::wasm::kWasmFunctionTypeCode;
encode_size32(ptr, in_arity);
for (size_t i = 0; i < in_arity; ++i) {
encode_valtype(ptr, type->params()[i].get());
}
encode_size32(ptr, out_arity);
for (size_t i = 0; i < out_arity; ++i) {
encode_valtype(ptr, type->results()[i].get());
}
*ptr++ = i::wasm::kImportSectionCode;
*ptr++ = 5; // size
*ptr++ = 1; // length
*ptr++ = 0; // module length
*ptr++ = 0; // name length
*ptr++ = i::wasm::kExternalFunction;
*ptr++ = 0; // type index
*ptr++ = i::wasm::kExportSectionCode;
*ptr++ = 4; // size
*ptr++ = 1; // length
*ptr++ = 0; // name length
*ptr++ = i::wasm::kExternalFunction;
*ptr++ = 0; // func index
assert(ptr - binary.get() == static_cast<ptrdiff_t>(size));
return binary;
}
auto wrapper(const GlobalType* type) -> vec<byte_t> {
auto size = 25 + zero_size(type->content());
auto binary = vec<byte_t>::make_uninitialized(size);
auto ptr = binary.get();
encode_header(ptr);
*ptr++ = i::wasm::kGlobalSectionCode;
encode_size32(ptr, 5 + zero_size(type->content())); // size
*ptr++ = 1; // length
encode_valtype(ptr, type->content());
*ptr++ = (type->mutability() == VAR);
encode_const_zero(ptr, type->content());
*ptr++ = 0x0b; // end
*ptr++ = i::wasm::kExportSectionCode;
*ptr++ = 4; // size
*ptr++ = 1; // length
*ptr++ = 0; // name length
*ptr++ = i::wasm::kExternalGlobal;
*ptr++ = 0; // func index
assert(ptr - binary.get() == static_cast<ptrdiff_t>(size));
return binary;
}
////////////////////////////////////////////////////////////////////////////////
// Decoding
// Numbers
auto u32(const byte_t*& pos) -> uint32_t {
uint32_t n = 0;
uint32_t shift = 0;
byte_t b;
do {
b = *pos++;
n += (b & 0x7f) << shift;
shift += 7;
} while ((b & 0x80) != 0);
return n;
}
auto u64(const byte_t*& pos) -> uint64_t {
uint64_t n = 0;
uint64_t shift = 0;
byte_t b;
do {
b = *pos++;
n += (b & 0x7f) << shift;
shift += 7;
} while ((b & 0x80) != 0);
return n;
}
void u32_skip(const byte_t*& pos) { bin::u32(pos); }
// Names
auto name(const byte_t*& pos) -> Name {
auto size = bin::u32(pos);
auto start = pos;
auto name = Name::make_uninitialized(size);
std::memcpy(name.get(), start, size);
pos += size;
return name;
}
void name_skip(const byte_t*& pos) {
auto size = bin::u32(pos);
pos += size;
}
// Types
auto valtype(const byte_t*& pos) -> own<wasm::ValType*> {
switch (*pos++) {
case i::wasm::kLocalI32:
return ValType::make(I32);
case i::wasm::kLocalI64:
return ValType::make(I64);
case i::wasm::kLocalF32:
return ValType::make(F32);
case i::wasm::kLocalF64:
return ValType::make(F64);
case i::wasm::kLocalAnyFunc:
return ValType::make(FUNCREF);
case i::wasm::kLocalAnyRef:
return ValType::make(ANYREF);
default:
// TODO(wasm+): support new value types
UNREACHABLE();
}
return {};
}
auto mutability(const byte_t*& pos) -> Mutability {
return *pos++ ? VAR : CONST;
}
auto limits(const byte_t*& pos) -> Limits {
auto tag = *pos++;
auto min = bin::u32(pos);
if ((tag & 0x01) == 0) {
return Limits(min);
} else {
auto max = bin::u32(pos);
return Limits(min, max);
}
}
auto stacktype(const byte_t*& pos) -> vec<ValType*> {
size_t size = bin::u32(pos);
auto v = vec<ValType*>::make_uninitialized(size);
for (uint32_t i = 0; i < size; ++i) v[i] = bin::valtype(pos);
return v;
}
auto functype(const byte_t*& pos) -> own<FuncType*> {
assert(*pos == i::wasm::kWasmFunctionTypeCode);
++pos;
auto params = bin::stacktype(pos);
auto results = bin::stacktype(pos);
return FuncType::make(std::move(params), std::move(results));
}
auto globaltype(const byte_t*& pos) -> own<GlobalType*> {
auto content = bin::valtype(pos);
auto mutability = bin::mutability(pos);
return GlobalType::make(std::move(content), mutability);
}
auto tabletype(const byte_t*& pos) -> own<TableType*> {
auto elem = bin::valtype(pos);
auto limits = bin::limits(pos);
return TableType::make(std::move(elem), limits);
}
auto memorytype(const byte_t*& pos) -> own<MemoryType*> {
auto limits = bin::limits(pos);
return MemoryType::make(limits);
}
// Expressions
void expr_skip(const byte_t*& pos) {
switch (*pos++) {
case i::wasm::kExprI32Const:
case i::wasm::kExprI64Const:
case i::wasm::kExprGetGlobal: {
bin::u32_skip(pos);
} break;
case i::wasm::kExprF32Const: {
pos += 4;
} break;
case i::wasm::kExprF64Const: {
pos += 8;
} break;
default: {
// TODO(wasm+): support new expression forms
UNREACHABLE();
}
}
++pos; // end
}
// Sections
auto section(const vec<byte_t>& binary, i::wasm::SectionCode sec)
-> const byte_t* {
const byte_t* end = binary.get() + binary.size();
const byte_t* pos = binary.get() + 8; // skip header
while (pos < end && *pos++ != sec) {
auto size = bin::u32(pos);
pos += size;
}
if (pos == end) return nullptr;
bin::u32_skip(pos);
return pos;
}
// Only for asserts/DCHECKs.
auto section_end(const vec<byte_t>& binary, i::wasm::SectionCode sec)
-> const byte_t* {
const byte_t* end = binary.get() + binary.size();
const byte_t* pos = binary.get() + 8; // skip header
while (pos < end && *pos != sec) {
++pos;
auto size = bin::u32(pos);
pos += size;
}
if (pos == end) return nullptr;
++pos;
auto size = bin::u32(pos);
return pos + size;
}
// Type section
auto types(const vec<byte_t>& binary) -> vec<FuncType*> {
auto pos = bin::section(binary, i::wasm::kTypeSectionCode);
if (pos == nullptr) return vec<FuncType*>::make();
size_t size = bin::u32(pos);
// TODO(wasm+): support new deftypes
auto v = vec<FuncType*>::make_uninitialized(size);
for (uint32_t i = 0; i < size; ++i) {
v[i] = bin::functype(pos);
}
assert(pos == bin::section_end(binary, i::wasm::kTypeSectionCode));
return v;
}
// Import section
auto imports(const vec<byte_t>& binary, const vec<FuncType*>& types)
-> vec<ImportType*> {
auto pos = bin::section(binary, i::wasm::kImportSectionCode);
if (pos == nullptr) return vec<ImportType*>::make();
size_t size = bin::u32(pos);
auto v = vec<ImportType*>::make_uninitialized(size);
for (uint32_t i = 0; i < size; ++i) {
auto module = bin::name(pos);
auto name = bin::name(pos);
own<ExternType*> type;
switch (*pos++) {
case i::wasm::kExternalFunction:
type = types[bin::u32(pos)]->copy();
break;
case i::wasm::kExternalTable:
type = bin::tabletype(pos);
break;
case i::wasm::kExternalMemory:
type = bin::memorytype(pos);
break;
case i::wasm::kExternalGlobal:
type = bin::globaltype(pos);
break;
default:
UNREACHABLE();
}
v[i] =
ImportType::make(std::move(module), std::move(name), std::move(type));
}
assert(pos == bin::section_end(binary, i::wasm::kImportSectionCode));
return v;
}
auto count(const vec<ImportType*>& imports, ExternKind kind) -> uint32_t {
uint32_t n = 0;
for (uint32_t i = 0; i < imports.size(); ++i) {
if (imports[i]->type()->kind() == kind) ++n;
}
return n;
}
// Function section
auto funcs(const vec<byte_t>& binary, const vec<ImportType*>& imports,
const vec<FuncType*>& types) -> vec<FuncType*> {
auto pos = bin::section(binary, i::wasm::kFunctionSectionCode);
size_t size = pos != nullptr ? bin::u32(pos) : 0;
auto v =
vec<FuncType*>::make_uninitialized(size + count(imports, EXTERN_FUNC));
size_t j = 0;
for (uint32_t i = 0; i < imports.size(); ++i) {
auto et = imports[i]->type();
if (et->kind() == EXTERN_FUNC) {
v[j++] = et->func()->copy();
}
}
if (pos != nullptr) {
for (; j < v.size(); ++j) {
v[j] = types[bin::u32(pos)]->copy();
}
assert(pos == bin::section_end(binary, i::wasm::kFunctionSectionCode));
}
return v;
}
// Global section
auto globals(const vec<byte_t>& binary, const vec<ImportType*>& imports)
-> vec<GlobalType*> {
auto pos = bin::section(binary, i::wasm::kGlobalSectionCode);
size_t size = pos != nullptr ? bin::u32(pos) : 0;
auto v = vec<GlobalType*>::make_uninitialized(size +
count(imports, EXTERN_GLOBAL));
size_t j = 0;
for (uint32_t i = 0; i < imports.size(); ++i) {
auto et = imports[i]->type();
if (et->kind() == EXTERN_GLOBAL) {
v[j++] = et->global()->copy();
}
}
if (pos != nullptr) {
for (; j < v.size(); ++j) {
v[j] = bin::globaltype(pos);
expr_skip(pos);
}
assert(pos == bin::section_end(binary, i::wasm::kGlobalSectionCode));
}
return v;
}
// Table section
auto tables(const vec<byte_t>& binary, const vec<ImportType*>& imports)
-> vec<TableType*> {
auto pos = bin::section(binary, i::wasm::kTableSectionCode);
size_t size = pos != nullptr ? bin::u32(pos) : 0;
auto v =
vec<TableType*>::make_uninitialized(size + count(imports, EXTERN_TABLE));
size_t j = 0;
for (uint32_t i = 0; i < imports.size(); ++i) {
auto et = imports[i]->type();
if (et->kind() == EXTERN_TABLE) {
v[j++] = et->table()->copy();
}
}
if (pos != nullptr) {
for (; j < v.size(); ++j) {
v[j] = bin::tabletype(pos);
}
assert(pos == bin::section_end(binary, i::wasm::kTableSectionCode));
}
return v;
}
// Memory section
auto memories(const vec<byte_t>& binary, const vec<ImportType*>& imports)
-> vec<MemoryType*> {
auto pos = bin::section(binary, i::wasm::kMemorySectionCode);
size_t size = pos != nullptr ? bin::u32(pos) : 0;
auto v = vec<MemoryType*>::make_uninitialized(size +
count(imports, EXTERN_MEMORY));
size_t j = 0;
for (uint32_t i = 0; i < imports.size(); ++i) {
auto et = imports[i]->type();
if (et->kind() == EXTERN_MEMORY) {
v[j++] = et->memory()->copy();
}
}
if (pos != nullptr) {
for (; j < v.size(); ++j) {
v[j] = bin::memorytype(pos);
}
assert(pos == bin::section_end(binary, i::wasm::kMemorySectionCode));
}
return v;
}
// Export section
auto exports(const vec<byte_t>& binary, const vec<FuncType*>& funcs,
const vec<GlobalType*>& globals, const vec<TableType*>& tables,
const vec<MemoryType*>& memories) -> vec<ExportType*> {
auto pos = bin::section(binary, i::wasm::kExportSectionCode);
if (pos == nullptr) return vec<ExportType*>::make();
size_t size = bin::u32(pos);
auto exports = vec<ExportType*>::make_uninitialized(size);
for (uint32_t i = 0; i < size; ++i) {
auto name = bin::name(pos);
auto tag = *pos++;
auto index = bin::u32(pos);
own<ExternType*> type;
switch (tag) {
case i::wasm::kExternalFunction:
type = funcs[index]->copy();
break;
case i::wasm::kExternalTable:
type = tables[index]->copy();
break;
case i::wasm::kExternalMemory:
type = memories[index]->copy();
break;
case i::wasm::kExternalGlobal:
type = globals[index]->copy();
break;
default:
UNREACHABLE();
}
exports[i] = ExportType::make(std::move(name), std::move(type));
}
assert(pos == bin::section_end(binary, i::wasm::kExportSectionCode));
return exports;
}
auto imports(const vec<byte_t>& binary) -> vec<ImportType*> {
return bin::imports(binary, bin::types(binary));
}
auto exports(const vec<byte_t>& binary) -> vec<ExportType*> {
auto types = bin::types(binary);
auto imports = bin::imports(binary, types);
auto funcs = bin::funcs(binary, imports, types);
auto globals = bin::globals(binary, imports);
auto tables = bin::tables(binary, imports);
auto memories = bin::memories(binary, imports);
return bin::exports(binary, funcs, globals, tables, memories);
}
} // namespace bin
} // namespace wasm
// BEGIN FILE wasm-v8-lowlevel.cc
namespace v8 {
namespace wasm {
// Objects
auto object_isolate(const v8::Persistent<v8::Object>& obj) -> v8::Isolate* {
struct FakePersistent {
v8::Object* val;
};
auto v8_obj = reinterpret_cast<const FakePersistent*>(&obj)->val;
return v8_obj->GetIsolate();
}
template <class T>
auto object_handle(T v8_obj) -> i::Handle<T> {
return handle(v8_obj, v8_obj->GetIsolate());
}
// Foreign pointers
auto foreign_new(v8::Isolate* isolate, void* ptr) -> v8::Local<v8::Value> {
auto foreign = v8::FromCData(reinterpret_cast<i::Isolate*>(isolate),
reinterpret_cast<i::Address>(ptr));
return v8::Utils::ToLocal(foreign);
}
auto foreign_get(v8::Local<v8::Value> val) -> void* {
auto foreign = v8::Utils::OpenHandle(*val);
if (!foreign->IsForeign()) return nullptr;
auto addr = v8::ToCData<i::Address>(*foreign);
return reinterpret_cast<void*>(addr);
}
// Types
auto v8_valtype_to_wasm(i::wasm::ValueType v8_valtype) -> ::wasm::ValKind {
switch (v8_valtype) {
case i::wasm::kWasmI32:
return ::wasm::I32;
case i::wasm::kWasmI64:
return ::wasm::I64;
case i::wasm::kWasmF32:
return ::wasm::F32;
case i::wasm::kWasmF64:
return ::wasm::F64;
default:
// TODO(wasm+): support new value types
UNREACHABLE();
}
}
auto func_type_param_arity(v8::Local<v8::Object> function) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(function);
auto v8_function = i::Handle<i::WasmExportedFunction>::cast(v8_object);
i::wasm::FunctionSig* sig = v8_function->instance()
->module()
->functions[v8_function->function_index()]
.sig;
return static_cast<uint32_t>(sig->parameter_count());
}
auto func_type_result_arity(v8::Local<v8::Object> function) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(function);
auto v8_function = i::Handle<i::WasmExportedFunction>::cast(v8_object);
i::wasm::FunctionSig* sig = v8_function->instance()
->module()
->functions[v8_function->function_index()]
.sig;
return static_cast<uint32_t>(sig->return_count());
}
auto func_type_param(v8::Local<v8::Object> function, size_t i)
-> ::wasm::ValKind {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(function);
auto v8_function = i::Handle<i::WasmExportedFunction>::cast(v8_object);
i::wasm::FunctionSig* sig = v8_function->instance()
->module()
->functions[v8_function->function_index()]
.sig;
return v8_valtype_to_wasm(sig->GetParam(i));
}
auto func_type_result(v8::Local<v8::Object> function, size_t i)
-> ::wasm::ValKind {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(function);
auto v8_function = i::Handle<i::WasmExportedFunction>::cast(v8_object);
i::wasm::FunctionSig* sig = v8_function->instance()
->module()
->functions[v8_function->function_index()]
.sig;
return v8_valtype_to_wasm(sig->GetReturn(i));
}
auto global_type_content(v8::Local<v8::Object> global) -> ::wasm::ValKind {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_valtype_to_wasm(v8_global->type());
}
auto global_type_mutable(v8::Local<v8::Object> global) -> bool {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_global->is_mutable();
}
auto table_type_min(v8::Local<v8::Object> table) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
return v8_table->current_length();
}
auto table_type_max(v8::Local<v8::Object> table) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
auto v8_max_obj = v8_table->maximum_length();
uint32_t max;
return v8_max_obj->ToUint32(&max) ? max : 0xffffffffu;
}
auto memory_size(v8::Local<v8::Object> memory) -> uint32_t;
auto memory_type_min(v8::Local<v8::Object> memory) -> uint32_t {
return memory_size(memory);
}
auto memory_type_max(v8::Local<v8::Object> memory) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(memory);
auto v8_memory = i::Handle<i::WasmMemoryObject>::cast(v8_object);
return v8_memory->has_maximum_pages() ? v8_memory->maximum_pages()
: 0xffffffffu;
}
// Modules
auto module_binary_size(v8::Local<v8::Object> module) -> size_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(module);
auto v8_module = i::Handle<i::WasmModuleObject>::cast(v8_object);
return v8_module->native_module()->wire_bytes().size();
}
auto module_binary(v8::Local<v8::Object> module) -> const char* {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(module);
auto v8_module = i::Handle<i::WasmModuleObject>::cast(v8_object);
return reinterpret_cast<const char*>(
v8_module->native_module()->wire_bytes().start());
}
auto module_serialize_size(v8::Local<v8::Object> module) -> size_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(module);
auto v8_module = i::Handle<i::WasmModuleObject>::cast(v8_object);
i::wasm::WasmSerializer serializer(v8_module->native_module());
return serializer.GetSerializedNativeModuleSize();
}
auto module_serialize(v8::Local<v8::Object> module, char* buffer, size_t size)
-> bool {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(module);
auto v8_module = i::Handle<i::WasmModuleObject>::cast(v8_object);
i::wasm::WasmSerializer serializer(v8_module->native_module());
return serializer.SerializeNativeModule(
{reinterpret_cast<uint8_t*>(buffer), size});
}
auto module_deserialize(v8::Isolate* isolate, const char* binary,
size_t binary_size, const char* buffer,
size_t buffer_size) -> v8::MaybeLocal<v8::Object> {
auto v8_isolate = reinterpret_cast<i::Isolate*>(isolate);
auto maybe_v8_module = i::wasm::DeserializeNativeModule(
v8_isolate, {reinterpret_cast<const uint8_t*>(buffer), buffer_size},
{reinterpret_cast<const uint8_t*>(binary), binary_size});
if (maybe_v8_module.is_null()) return v8::MaybeLocal<v8::Object>();
auto v8_module =
i::Handle<i::JSObject>::cast(maybe_v8_module.ToHandleChecked());
return v8::MaybeLocal<v8::Object>(v8::Utils::ToLocal(v8_module));
}
// Instances
auto instance_module(v8::Local<v8::Object> instance) -> v8::Local<v8::Object> {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(instance);
auto v8_instance = i::Handle<i::WasmInstanceObject>::cast(v8_object);
auto v8_module =
object_handle(i::JSObject::cast(v8_instance->module_object()));
return v8::Utils::ToLocal(v8_module);
}
auto instance_exports(v8::Local<v8::Object> instance) -> v8::Local<v8::Object> {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(instance);
auto v8_instance = i::Handle<i::WasmInstanceObject>::cast(v8_object);
auto v8_exports = object_handle(v8_instance->exports_object());
return v8::Utils::ToLocal(v8_exports);
}
// Externals
auto extern_kind(v8::Local<v8::Object> external) -> ::wasm::ExternKind {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(external);
if (i::WasmExportedFunction::IsWasmExportedFunction(*v8_object))
return ::wasm::EXTERN_FUNC;
if (v8_object->IsWasmGlobalObject()) return ::wasm::EXTERN_GLOBAL;
if (v8_object->IsWasmTableObject()) return ::wasm::EXTERN_TABLE;
if (v8_object->IsWasmMemoryObject()) return ::wasm::EXTERN_MEMORY;
UNREACHABLE();
}
// Functions
auto func_instance(v8::Local<v8::Function> function) -> v8::Local<v8::Object> {
auto v8_function = v8::Utils::OpenHandle(*function);
auto v8_func = i::Handle<i::WasmExportedFunction>::cast(v8_function);
auto v8_instance = object_handle(i::JSObject::cast(v8_func->instance()));
return v8::Utils::ToLocal(v8_instance);
}
// Globals
auto global_get_i32(v8::Local<v8::Object> global) -> int32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_global->GetI32();
}
auto global_get_i64(v8::Local<v8::Object> global) -> int64_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_global->GetI64();
}
auto global_get_f32(v8::Local<v8::Object> global) -> float {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_global->GetF32();
}
auto global_get_f64(v8::Local<v8::Object> global) -> double {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
return v8_global->GetF64();
}
void global_set_i32(v8::Local<v8::Object> global, int32_t val) {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
v8_global->SetI32(val);
}
void global_set_i64(v8::Local<v8::Object> global, int64_t val) {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
v8_global->SetI64(val);
}
void global_set_f32(v8::Local<v8::Object> global, float val) {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
v8_global->SetF32(val);
}
void global_set_f64(v8::Local<v8::Object> global, double val) {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(global);
auto v8_global = i::Handle<i::WasmGlobalObject>::cast(v8_object);
v8_global->SetF32(val);
}
// Tables
auto table_get(v8::Local<v8::Object> table, size_t index)
-> v8::MaybeLocal<v8::Function> {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
if (index > std::numeric_limits<int>::max()) return {};
i::Isolate* isolate = v8_table->GetIsolate();
i::MaybeHandle<i::Object> maybe_result =
i::WasmTableObject::Get(isolate, v8_table, static_cast<int>(index));
i::Handle<i::Object> result;
if (!maybe_result.ToHandle(&result)) {
// TODO(jkummerow): Clear pending exception?
return {};
}
if (!result->IsJSFunction()) return {};
return v8::MaybeLocal<v8::Function>(
v8::Utils::ToLocal(i::Handle<i::JSFunction>::cast(result)));
}
auto table_set(v8::Local<v8::Object> table, size_t index,
v8::MaybeLocal<v8::Function> maybe) -> bool {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
i::Handle<i::Object> v8_function =
maybe.IsEmpty()
? i::Handle<i::Object>::cast(
i::ReadOnlyRoots(v8_table->GetIsolate()).null_value_handle())
: i::Handle<i::Object>::cast(
v8::Utils::OpenHandle<v8::Function, i::JSReceiver>(
maybe.ToLocalChecked()));
if (index >= v8_table->current_length()) return false;
{
v8::TryCatch handler(table->GetIsolate());
i::WasmTableObject::Set(v8_table->GetIsolate(), v8_table,
static_cast<uint32_t>(index), v8_function);
if (handler.HasCaught()) return false;
}
return true;
}
auto table_size(v8::Local<v8::Object> table) -> size_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
return v8_table->current_length();
}
auto table_grow(v8::Local<v8::Object> table, size_t delta,
v8::MaybeLocal<v8::Function> init) -> bool {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(table);
auto v8_table = i::Handle<i::WasmTableObject>::cast(v8_object);
if (delta > 0xfffffffflu) return false;
auto old_size = v8_table->current_length();
// TODO(jkummerow): Overflow check.
auto new_size = old_size + static_cast<uint32_t>(delta);
// TODO(v8): This should happen in WasmTableObject::Grow.
if (new_size > table_type_max(table)) return false;
{
v8::TryCatch handler(table->GetIsolate());
v8_table->Grow(v8_table->GetIsolate(), static_cast<uint32_t>(delta));
if (handler.HasCaught()) return false;
}
// TODO(v8): This should happen in WasmTableObject::Grow.
if (new_size != old_size) {
auto isolate = v8_table->GetIsolate();
i::Handle<i::FixedArray> old_array(v8_table->elements(), isolate);
auto new_array =
isolate->factory()->NewFixedArray(static_cast<int>(new_size));
assert(static_cast<uint32_t>(old_array->length()) == old_size);
for (int i = 0; i < static_cast<int>(old_size); ++i)
new_array->set(i, old_array->get(i));
i::Handle<i::Object> val = isolate->factory()->null_value();
if (!init.IsEmpty())
val = v8::Utils::OpenHandle<v8::Function, i::JSReceiver>(
init.ToLocalChecked());
for (int i = old_size; i < static_cast<int>(new_size); ++i)
new_array->set(i, *val);
v8_table->set_elements(*new_array);
}
return true;
}
// Memory
auto memory_data(v8::Local<v8::Object> memory) -> char* {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(memory);
auto v8_memory = i::Handle<i::WasmMemoryObject>::cast(v8_object);
return reinterpret_cast<char*>(v8_memory->array_buffer()->backing_store());
}
auto memory_data_size(v8::Local<v8::Object> memory) -> size_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(memory);
auto v8_memory = i::Handle<i::WasmMemoryObject>::cast(v8_object);
return v8_memory->array_buffer()->byte_length();
}
auto memory_size(v8::Local<v8::Object> memory) -> uint32_t {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(memory);
auto v8_memory = i::Handle<i::WasmMemoryObject>::cast(v8_object);
return static_cast<uint32_t>(v8_memory->array_buffer()->byte_length() /
i::wasm::kWasmPageSize);
}
auto memory_grow(v8::Local<v8::Object> memory, uint32_t delta) -> bool {
auto v8_object = v8::Utils::OpenHandle<v8::Object, i::JSReceiver>(memory);
auto v8_memory = i::Handle<i::WasmMemoryObject>::cast(v8_object);
auto old =
i::WasmMemoryObject::Grow(v8_memory->GetIsolate(), v8_memory, delta);
return old != -1;
}
} // namespace wasm
} // namespace v8
/// BEGIN FILE wasm-v8.cc
namespace wasm {
///////////////////////////////////////////////////////////////////////////////
// Auxiliaries
[[noreturn]] void WASM_UNIMPLEMENTED(const char* s) {
std::cerr << "Wasm API: " << s << " not supported yet!\n";
exit(1);
}
template <class T>
void ignore(T) {}
template <class C>
struct implement;
template <class C>
auto impl(C* x) -> typename implement<C>::type* {
return reinterpret_cast<typename implement<C>::type*>(x);
}
template <class C>
auto impl(const C* x) -> const typename implement<C>::type* {
return reinterpret_cast<const typename implement<C>::type*>(x);
}
template <class C>
auto seal(typename implement<C>::type* x) -> C* {
return reinterpret_cast<C*>(x);
}
template <class C>
auto seal(const typename implement<C>::type* x) -> const C* {
return reinterpret_cast<const C*>(x);
}
#ifdef DEBUG
template <class T>
void vec<T>::make_data() {}
template <class T>
void vec<T>::free_data() {}
#endif
///////////////////////////////////////////////////////////////////////////////
// Runtime Environment
// Configuration
struct ConfigImpl {
ConfigImpl() {}
~ConfigImpl() {}
};
template <>
struct implement<Config> {
using type = ConfigImpl;
};
Config::~Config() { impl(this)->~ConfigImpl(); }
void Config::operator delete(void* p) { ::operator delete(p); }
auto Config::make() -> own<Config*> {
return own<Config*>(seal<Config>(new (std::nothrow) ConfigImpl()));
}
// Engine
struct EngineImpl {
static bool created;
std::unique_ptr<v8::Platform> platform;
EngineImpl() {
assert(!created);
created = true;
}
~EngineImpl() {
v8::V8::Dispose();
v8::V8::ShutdownPlatform();
}
};
bool EngineImpl::created = false;
template <>
struct implement<Engine> {
using type = EngineImpl;
};
Engine::~Engine() { impl(this)->~EngineImpl(); }
void Engine::operator delete(void* p) { ::operator delete(p); }
auto Engine::make(own<Config*>&& config) -> own<Engine*> {
i::FLAG_expose_gc = true;
i::FLAG_experimental_wasm_bigint = true;
i::FLAG_experimental_wasm_mv = true;
auto engine = new (std::nothrow) EngineImpl;
if (!engine) return own<Engine*>();
engine->platform = v8::platform::NewDefaultPlatform();
v8::V8::InitializePlatform(engine->platform.get());
v8::V8::Initialize();
return make_own(seal<Engine>(engine));
}
// Stores
enum v8_string_t {
V8_S_EMPTY,
V8_S_I32,
V8_S_I64,
V8_S_F32,
V8_S_F64,
V8_S_ANYREF,
V8_S_ANYFUNC,
V8_S_VALUE,
V8_S_MUTABLE,
V8_S_ELEMENT,
V8_S_MINIMUM,
V8_S_MAXIMUM,
V8_S_COUNT
};
enum v8_symbol_t { V8_Y_CALLBACK, V8_Y_ENV, V8_Y_COUNT };
enum v8_function_t {
V8_F_WEAKMAP,
V8_F_WEAKMAP_PROTO,
V8_F_WEAKMAP_GET,
V8_F_WEAKMAP_SET,
V8_F_MODULE,
V8_F_GLOBAL,
V8_F_TABLE,
V8_F_MEMORY,
V8_F_INSTANCE,
V8_F_VALIDATE,
V8_F_COUNT,
};
class StoreImpl {
friend own<Store*> Store::make(Engine*);
v8::Isolate::CreateParams create_params_;
v8::Isolate* isolate_;
v8::Eternal<v8::Context> context_;
v8::Eternal<v8::String> strings_[V8_S_COUNT];
v8::Eternal<v8::Symbol> symbols_[V8_Y_COUNT];
v8::Eternal<v8::Function> functions_[V8_F_COUNT];
v8::Eternal<v8::Object> host_data_map_;
v8::Eternal<v8::Symbol> callback_symbol_;
public:
StoreImpl() {}
~StoreImpl() {
#ifdef DEBUG
reinterpret_cast<i::Isolate*>(isolate_)->heap()->PreciseCollectAllGarbage(
i::Heap::kNoGCFlags, i::GarbageCollectionReason::kTesting,
v8::kGCCallbackFlagForced);
#endif
context()->Exit();
isolate_->Exit();
isolate_->Dispose();
delete create_params_.array_buffer_allocator;
}
auto isolate() const -> v8::Isolate* { return isolate_; }
auto context() const -> v8::Local<v8::Context> {
return context_.Get(isolate_);
}
auto v8_string(v8_string_t i) const -> v8::Local<v8::String> {
return strings_[i].Get(isolate_);
}
auto v8_string(v8_symbol_t i) const -> v8::Local<v8::Symbol> {
return symbols_[i].Get(isolate_);
}
auto v8_function(v8_function_t i) const -> v8::Local<v8::Function> {
return functions_[i].Get(isolate_);
}
auto host_data_map() const -> v8::Local<v8::Object> {
return host_data_map_.Get(isolate_);
}
static auto get(v8::Isolate* isolate) -> StoreImpl* {
return static_cast<StoreImpl*>(isolate->GetData(0));
}
};
template <>
struct implement<Store> {
using type = StoreImpl;
};
Store::~Store() { impl(this)->~StoreImpl(); }
void Store::operator delete(void* p) { ::operator delete(p); }
auto Store::make(Engine*) -> own<Store*> {
auto store = make_own(new (std::nothrow) StoreImpl());
if (!store) return own<Store*>();
// Create isolate.
store->create_params_.array_buffer_allocator =
v8::ArrayBuffer::Allocator::NewDefaultAllocator();
auto isolate = v8::Isolate::New(store->create_params_);
if (!isolate) return own<Store*>();
{
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
// Create context.
auto context = v8::Context::New(isolate);
if (context.IsEmpty()) return own<Store*>();
v8::Context::Scope context_scope(context);
store->isolate_ = isolate;
store->context_ = v8::Eternal<v8::Context>(isolate, context);
// Create strings.
static const char* const raw_strings[V8_S_COUNT] = {
"", "i32", "i64", "f32", "f64", "anyref",
"anyfunc", "value", "mutable", "element", "initial", "maximum",
};
for (int i = 0; i < V8_S_COUNT; ++i) {
auto maybe = v8::String::NewFromUtf8(isolate, raw_strings[i],
v8::NewStringType::kNormal);
if (maybe.IsEmpty()) return own<Store*>();
auto string = maybe.ToLocalChecked();
store->strings_[i] = v8::Eternal<v8::String>(isolate, string);
}
for (int i = 0; i < V8_Y_COUNT; ++i) {
auto symbol = v8::Symbol::New(isolate);
store->symbols_[i] = v8::Eternal<v8::Symbol>(isolate, symbol);
}
// Extract functions.
auto global = context->Global();
auto maybe_wasm_name = v8::String::NewFromUtf8(isolate, "WebAssembly",
v8::NewStringType::kNormal);
if (maybe_wasm_name.IsEmpty()) return own<Store*>();
auto wasm_name = maybe_wasm_name.ToLocalChecked();
auto maybe_wasm = global->Get(context, wasm_name);
if (maybe_wasm.IsEmpty()) return own<Store*>();
auto wasm = v8::Local<v8::Object>::Cast(maybe_wasm.ToLocalChecked());
v8::Local<v8::Object> weakmap;
v8::Local<v8::Object> weakmap_proto;
struct {
const char* name;
v8::Local<v8::Object>* carrier;
} raw_functions[V8_F_COUNT] = {
{"WeakMap", &global}, {"prototype", &weakmap},
{"get", &weakmap_proto}, {"set", &weakmap_proto},
{"Module", &wasm}, {"Global", &wasm},
{"Table", &wasm}, {"Memory", &wasm},
{"Instance", &wasm}, {"validate", &wasm},
};
for (int i = 0; i < V8_F_COUNT; ++i) {
auto maybe_name = v8::String::NewFromUtf8(isolate, raw_functions[i].name,
v8::NewStringType::kNormal);
if (maybe_name.IsEmpty()) return own<Store*>();
auto name = maybe_name.ToLocalChecked();
assert(!raw_functions[i].carrier->IsEmpty());
// TODO(wasm+): remove
if ((*raw_functions[i].carrier)->IsUndefined()) continue;
auto maybe_obj = (*raw_functions[i].carrier)->Get(context, name);
if (maybe_obj.IsEmpty()) return own<Store*>();
auto obj = v8::Local<v8::Object>::Cast(maybe_obj.ToLocalChecked());
if (i == V8_F_WEAKMAP_PROTO) {
assert(obj->IsObject());
weakmap_proto = obj;
} else {
assert(obj->IsFunction());
auto function = v8::Local<v8::Function>::Cast(obj);
store->functions_[i] = v8::Eternal<v8::Function>(isolate, function);
if (i == V8_F_WEAKMAP) weakmap = function;
}
}
// Create host data weak map.
v8::Local<v8::Value>* empty_args = nullptr;
auto maybe_weakmap =
store->v8_function(V8_F_WEAKMAP)->NewInstance(context, 0, empty_args);
if (maybe_weakmap.IsEmpty()) return own<Store*>();
auto map = v8::Local<v8::Object>::Cast(maybe_weakmap.ToLocalChecked());
assert(map->IsWeakMap());
store->host_data_map_ = v8::Eternal<v8::Object>(isolate, map);
}
store->isolate()->Enter();
store->context()->Enter();
isolate->SetData(0, store.get());
return make_own(seal<Store>(store.release()));
}
///////////////////////////////////////////////////////////////////////////////
// Type Representations
// Value Types
struct ValTypeImpl {
ValKind kind;
explicit ValTypeImpl(ValKind kind) : kind(kind) {}
};
template <>
struct implement<ValType> {
using type = ValTypeImpl;
};
ValTypeImpl* valtypes[] = {
new ValTypeImpl(I32), new ValTypeImpl(I64), new ValTypeImpl(F32),
new ValTypeImpl(F64), new ValTypeImpl(ANYREF), new ValTypeImpl(FUNCREF),
};
ValType::~ValType() {}
void ValType::operator delete(void*) {}
auto ValType::make(ValKind k) -> own<ValType*> {
auto result = seal<ValType>(valtypes[k]);
return own<ValType*>(result);
}
auto ValType::copy() const -> own<ValType*> { return make(kind()); }
auto ValType::kind() const -> ValKind { return impl(this)->kind; }
// Extern Types
struct ExternTypeImpl {
ExternKind kind;
explicit ExternTypeImpl(ExternKind kind) : kind(kind) {}
virtual ~ExternTypeImpl() {}
};
template <>
struct implement<ExternType> {
using type = ExternTypeImpl;
};
ExternType::~ExternType() { impl(this)->~ExternTypeImpl(); }
void ExternType::operator delete(void* p) { ::operator delete(p); }
auto ExternType::copy() const -> own<ExternType*> {
switch (kind()) {
case EXTERN_FUNC:
return func()->copy();
case EXTERN_GLOBAL:
return global()->copy();
case EXTERN_TABLE:
return table()->copy();
case EXTERN_MEMORY:
return memory()->copy();
}
}
auto ExternType::kind() const -> ExternKind { return impl(this)->kind; }
// Function Types
struct FuncTypeImpl : ExternTypeImpl {
vec<ValType*> params;
vec<ValType*> results;
FuncTypeImpl(vec<ValType*>& params, vec<ValType*>& results)
: ExternTypeImpl(EXTERN_FUNC),
params(std::move(params)),
results(std::move(results)) {}
~FuncTypeImpl() {}
};
template <>
struct implement<FuncType> {
using type = FuncTypeImpl;
};
FuncType::~FuncType() {}
auto FuncType::make(vec<ValType*>&& params, vec<ValType*>&& results)
-> own<FuncType*> {
return params && results
? own<FuncType*>(seal<FuncType>(new (std::nothrow)
FuncTypeImpl(params, results)))
: own<FuncType*>();
}
auto FuncType::copy() const -> own<FuncType*> {
return make(params().copy(), results().copy());
}
auto FuncType::params() const -> const vec<ValType*>& {
return impl(this)->params;
}
auto FuncType::results() const -> const vec<ValType*>& {
return impl(this)->results;
}
auto ExternType::func() -> FuncType* {
return kind() == EXTERN_FUNC
? seal<FuncType>(static_cast<FuncTypeImpl*>(impl(this)))
: nullptr;
}
auto ExternType::func() const -> const FuncType* {
return kind() == EXTERN_FUNC
? seal<FuncType>(static_cast<const FuncTypeImpl*>(impl(this)))
: nullptr;
}
// Global Types
struct GlobalTypeImpl : ExternTypeImpl {
own<ValType*> content;
Mutability mutability;
GlobalTypeImpl(own<ValType*>& content, Mutability mutability)
: ExternTypeImpl(EXTERN_GLOBAL),
content(std::move(content)),
mutability(mutability) {}
~GlobalTypeImpl() {}
};
template <>
struct implement<GlobalType> {
using type = GlobalTypeImpl;
};
GlobalType::~GlobalType() {}
auto GlobalType::make(own<ValType*>&& content, Mutability mutability)
-> own<GlobalType*> {
return content ? own<GlobalType*>(seal<GlobalType>(
new (std::nothrow) GlobalTypeImpl(content, mutability)))
: own<GlobalType*>();
}
auto GlobalType::copy() const -> own<GlobalType*> {
return make(content()->copy(), mutability());
}
auto GlobalType::content() const -> const ValType* {
return impl(this)->content.get();
}
auto GlobalType::mutability() const -> Mutability {
return impl(this)->mutability;
}
auto ExternType::global() -> GlobalType* {
return kind() == EXTERN_GLOBAL
? seal<GlobalType>(static_cast<GlobalTypeImpl*>(impl(this)))
: nullptr;
}
auto ExternType::global() const -> const GlobalType* {
return kind() == EXTERN_GLOBAL
? seal<GlobalType>(static_cast<const GlobalTypeImpl*>(impl(this)))
: nullptr;
}
// Table Types
struct TableTypeImpl : ExternTypeImpl {
own<ValType*> element;
Limits limits;
TableTypeImpl(own<ValType*>& element, Limits limits)
: ExternTypeImpl(EXTERN_TABLE),
element(std::move(element)),
limits(limits) {}
~TableTypeImpl() {}
};
template <>
struct implement<TableType> {
using type = TableTypeImpl;
};
TableType::~TableType() {}
auto TableType::make(own<ValType*>&& element, Limits limits)
-> own<TableType*> {
return element ? own<TableType*>(seal<TableType>(
new (std::nothrow) TableTypeImpl(element, limits)))
: own<TableType*>();
}
auto TableType::copy() const -> own<TableType*> {
return make(element()->copy(), limits());
}
auto TableType::element() const -> const ValType* {
return impl(this)->element.get();
}
auto TableType::limits() const -> const Limits& { return impl(this)->limits; }
auto ExternType::table() -> TableType* {
return kind() == EXTERN_TABLE
? seal<TableType>(static_cast<TableTypeImpl*>(impl(this)))
: nullptr;
}
auto ExternType::table() const -> const TableType* {
return kind() == EXTERN_TABLE
? seal<TableType>(static_cast<const TableTypeImpl*>(impl(this)))
: nullptr;
}
// Memory Types
struct MemoryTypeImpl : ExternTypeImpl {
Limits limits;
explicit MemoryTypeImpl(Limits limits)
: ExternTypeImpl(EXTERN_MEMORY), limits(limits) {}
~MemoryTypeImpl() {}
};
template <>
struct implement<MemoryType> {
using type = MemoryTypeImpl;
};
MemoryType::~MemoryType() {}
auto MemoryType::make(Limits limits) -> own<MemoryType*> {
return own<MemoryType*>(
seal<MemoryType>(new (std::nothrow) MemoryTypeImpl(limits)));
}
auto MemoryType::copy() const -> own<MemoryType*> {
return MemoryType::make(limits());
}
auto MemoryType::limits() const -> const Limits& { return impl(this)->limits; }
auto ExternType::memory() -> MemoryType* {
return kind() == EXTERN_MEMORY
? seal<MemoryType>(static_cast<MemoryTypeImpl*>(impl(this)))
: nullptr;
}
auto ExternType::memory() const -> const MemoryType* {
return kind() == EXTERN_MEMORY
? seal<MemoryType>(static_cast<const MemoryTypeImpl*>(impl(this)))
: nullptr;
}
// Import Types
struct ImportTypeImpl {
Name module;
Name name;
own<ExternType*> type;
ImportTypeImpl(Name& module, Name& name, own<ExternType*>& type)
: module(std::move(module)),
name(std::move(name)),
type(std::move(type)) {}
~ImportTypeImpl() {}
};
template <>
struct implement<ImportType> {
using type = ImportTypeImpl;
};
ImportType::~ImportType() { impl(this)->~ImportTypeImpl(); }
void ImportType::operator delete(void* p) { ::operator delete(p); }
auto ImportType::make(Name&& module, Name&& name, own<ExternType*>&& type)
-> own<ImportType*> {
return module && name && type
? own<ImportType*>(seal<ImportType>(
new (std::nothrow) ImportTypeImpl(module, name, type)))
: own<ImportType*>();
}
auto ImportType::copy() const -> own<ImportType*> {
return make(module().copy(), name().copy(), type()->copy());
}
auto ImportType::module() const -> const Name& { return impl(this)->module; }
auto ImportType::name() const -> const Name& { return impl(this)->name; }
auto ImportType::type() const -> const ExternType* {
return impl(this)->type.get();
}
// Export Types
struct ExportTypeImpl {
Name name;
own<ExternType*> type;
ExportTypeImpl(Name& name, own<ExternType*>& type)
: name(std::move(name)), type(std::move(type)) {}
~ExportTypeImpl() {}
};
template <>
struct implement<ExportType> {
using type = ExportTypeImpl;
};
ExportType::~ExportType() { impl(this)->~ExportTypeImpl(); }
void ExportType::operator delete(void* p) { ::operator delete(p); }
auto ExportType::make(Name&& name, own<ExternType*>&& type)
-> own<ExportType*> {
return name && type ? own<ExportType*>(seal<ExportType>(
new (std::nothrow) ExportTypeImpl(name, type)))
: own<ExportType*>();
}
auto ExportType::copy() const -> own<ExportType*> {
return make(name().copy(), type()->copy());
}
auto ExportType::name() const -> const Name& { return impl(this)->name; }
auto ExportType::type() const -> const ExternType* {
return impl(this)->type.get();
}
///////////////////////////////////////////////////////////////////////////////
// Conversions of types from and to V8 objects
// Types
auto valtype_to_v8(StoreImpl* store, const ValType* type)
-> v8::Local<v8::Value> {
v8_string_t string;
switch (type->kind()) {
case I32:
string = V8_S_I32;
break;
case I64:
string = V8_S_I64;
break;
case F32:
string = V8_S_F32;
break;
case F64:
string = V8_S_F64;
break;
case ANYREF:
string = V8_S_ANYREF;
break;
case FUNCREF:
string = V8_S_ANYFUNC;
break;
default:
// TODO(wasm+): support new value types
UNREACHABLE();
}
return store->v8_string(string);
}
auto mutability_to_v8(StoreImpl* store, Mutability mutability)
-> v8::Local<v8::Boolean> {
return v8::Boolean::New(store->isolate(), mutability == VAR);
}
void limits_to_v8(StoreImpl* store, Limits limits, v8::Local<v8::Object> desc) {
auto isolate = store->isolate();
auto context = store->context();
ignore(desc->DefineOwnProperty(
context, store->v8_string(V8_S_MINIMUM),
v8::Integer::NewFromUnsigned(isolate, limits.min)));
if (limits.max != Limits(0).max) {
ignore(desc->DefineOwnProperty(
context, store->v8_string(V8_S_MAXIMUM),
v8::Integer::NewFromUnsigned(isolate, limits.max)));
}
}
auto globaltype_to_v8(StoreImpl* store, const GlobalType* type)
-> v8::Local<v8::Object> {
auto isolate = store->isolate();
auto context = store->context();
auto desc = v8::Object::New(isolate);
ignore(desc->DefineOwnProperty(context, store->v8_string(V8_S_VALUE),
valtype_to_v8(store, type->content())));
ignore(desc->DefineOwnProperty(context, store->v8_string(V8_S_MUTABLE),
mutability_to_v8(store, type->mutability())));
return desc;
}
auto tabletype_to_v8(StoreImpl* store, const TableType* type)
-> v8::Local<v8::Object> {
auto isolate = store->isolate();
auto context = store->context();
auto desc = v8::Object::New(isolate);
ignore(desc->DefineOwnProperty(context, store->v8_string(V8_S_ELEMENT),
valtype_to_v8(store, type->element())));
limits_to_v8(store, type->limits(), desc);
return desc;
}
auto memorytype_to_v8(StoreImpl* store, const MemoryType* type)
-> v8::Local<v8::Object> {
auto isolate = store->isolate();
auto desc = v8::Object::New(isolate);
limits_to_v8(store, type->limits(), desc);
return desc;
}
///////////////////////////////////////////////////////////////////////////////
// Runtime Values
// Values
auto val_to_v8(StoreImpl* store, const Val& v) -> v8::Local<v8::Value> {
auto isolate = store->isolate();
switch (v.kind()) {
case I32:
return v8::Integer::NewFromUnsigned(isolate, v.i32());
case I64:
return v8::BigInt::New(isolate, v.i64());
case F32:
return v8::Number::New(isolate, v.f32());
case F64:
return v8::Number::New(isolate, v.f64());
case ANYREF:
case FUNCREF: {
if (v.ref() == nullptr) {
return v8::Null(isolate);
} else {
WASM_UNIMPLEMENTED("ref value");
}
}
default:
UNREACHABLE();
}
}
auto v8_to_val(StoreImpl* store, v8::Local<v8::Value> value, const ValType* t)
-> own<Val> {
auto context = store->context();
switch (t->kind()) {
case I32:
return Val(value->Int32Value(context).ToChecked());
case I64: {
auto bigint = value->ToBigInt(context).ToLocalChecked();
return Val(bigint->Int64Value());
}
case F32: {
auto number = value->NumberValue(context).ToChecked();
return Val(static_cast<float32_t>(number));
}
case F64:
return Val(value->NumberValue(context).ToChecked());
case ANYREF:
case FUNCREF: {
if (value->IsNull()) {
return Val(nullptr);
} else {
WASM_UNIMPLEMENTED("ref value");
}
}
}
}
// References
template <class Ref>
class RefImpl : public v8::Persistent<v8::Object> {
public:
RefImpl() = delete;
static auto make(StoreImpl* store, v8::Local<v8::Object> obj) -> own<Ref*> {
static_assert(sizeof(RefImpl) == sizeof(v8::Persistent<v8::Object>),
"incompatible object layout");
RefImpl* self =
static_cast<RefImpl*>(new (std::nothrow) v8::Persistent<v8::Object>());
if (!self) return nullptr;
self->Reset(store->isolate(), obj);
return make_own(seal<Ref>(self));
}
auto copy() const -> own<Ref*> {
v8::HandleScope handle_scope(isolate());
return make(store(), v8_object());
}
auto store() const -> StoreImpl* { return StoreImpl::get(isolate()); }
auto isolate() const -> v8::Isolate* {
return v8::wasm::object_isolate(*this);
}
auto v8_object() const -> v8::Local<v8::Object> { return Get(isolate()); }
auto get_host_info() const -> void* {
v8::HandleScope handle_scope(isolate());
auto store = this->store();
v8::Local<v8::Value> args[] = {v8_object()};
auto maybe_result =
store->v8_function(V8_F_WEAKMAP_GET)
->Call(store->context(), store->host_data_map(), 1, args);
if (maybe_result.IsEmpty()) return nullptr;
auto data = v8::wasm::foreign_get(maybe_result.ToLocalChecked());
return reinterpret_cast<HostData*>(data)->info;
}
void set_host_info(void* info, void (*finalizer)(void*)) {
v8::HandleScope handle_scope(isolate());
auto store = this->store();
// V8 attaches finalizers to handles instead of objects, and such handles
// cannot be reused after the finalizer has been invoked.
// So we need to create them separately from the pool.
auto data = new HostData(store->isolate(), v8_object(), info, finalizer);
data->handle.template SetWeak<HostData>(data, &v8_finalizer,
v8::WeakCallbackType::kParameter);
auto foreign = v8::wasm::foreign_new(store->isolate(), data);
v8::Local<v8::Value> args[] = {v8_object(), foreign};
auto maybe_result =
store->v8_function(V8_F_WEAKMAP_SET)
->Call(store->context(), store->host_data_map(), 2, args);
if (maybe_result.IsEmpty()) return;
}
private:
struct HostData {
HostData(v8::Isolate* isolate, v8::Local<v8::Object> object, void* info,
void (*finalizer)(void*))
: handle(isolate, object), info(info), finalizer(finalizer) {}
v8::Persistent<v8::Object> handle;
void* info;
void (*finalizer)(void*);
};
static void v8_finalizer(const v8::WeakCallbackInfo<HostData>& info) {
auto data = info.GetParameter();
data->handle.Reset(); // Must reset weak handle before deleting it!
if (data->finalizer) (*data->finalizer)(data->info);
delete data;
}
};
template <>
struct implement<Ref> {
using type = RefImpl<Ref>;
};
Ref::~Ref() {
v8::HandleScope handle_scope(impl(this)->isolate());
impl(this)->Reset();
delete impl(this);
}
void Ref::operator delete(void* p) {}
auto Ref::copy() const -> own<Ref*> { return impl(this)->copy(); }
auto Ref::get_host_info() const -> void* { return impl(this)->get_host_info(); }
void Ref::set_host_info(void* info, void (*finalizer)(void*)) {
impl(this)->set_host_info(info, finalizer);
}
///////////////////////////////////////////////////////////////////////////////
// Runtime Objects
// Traps
template <>
struct implement<Trap> {
using type = RefImpl<Trap>;
};
Trap::~Trap() {}
auto Trap::copy() const -> own<Trap*> { return impl(this)->copy(); }
auto Trap::make(Store* store_abs, const Message& message) -> own<Trap*> {
auto store = impl(store_abs);
v8::Isolate* isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto maybe_string = v8::String::NewFromUtf8(isolate, message.get(),
v8::NewStringType::kNormal,
static_cast<int>(message.size()));
if (maybe_string.IsEmpty()) return own<Trap*>();
auto exception = v8::Exception::Error(maybe_string.ToLocalChecked());
return RefImpl<Trap>::make(store, v8::Local<v8::Object>::Cast(exception));
}
auto Trap::message() const -> Message {
auto isolate = impl(this)->isolate();
v8::HandleScope handle_scope(isolate);
auto message = v8::Exception::CreateMessage(isolate, impl(this)->v8_object());
v8::String::Utf8Value string(isolate, message->Get());
return vec<byte_t>::make(std::string(*string));
}
// Foreign Objects
template <>
struct implement<Foreign> {
using type = RefImpl<Foreign>;
};
Foreign::~Foreign() {}
auto Foreign::copy() const -> own<Foreign*> { return impl(this)->copy(); }
auto Foreign::make(Store* store_abs) -> own<Foreign*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto obj = v8::Object::New(isolate);
return RefImpl<Foreign>::make(store, obj);
}
// Modules
template <>
struct implement<Module> {
using type = RefImpl<Module>;
};
Module::~Module() {}
auto Module::copy() const -> own<Module*> { return impl(this)->copy(); }
auto Module::validate(Store* store_abs, const vec<byte_t>& binary) -> bool {
auto store = impl(store_abs);
v8::Isolate* isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto array_buffer = v8::ArrayBuffer::New(
isolate, const_cast<byte_t*>(binary.get()), binary.size());
v8::Local<v8::Value> args[] = {array_buffer};
auto result = store->v8_function(V8_F_VALIDATE)
->Call(store->context(), v8::Undefined(isolate), 1, args);
if (result.IsEmpty()) return false;
return result.ToLocalChecked()->IsTrue();
}
auto Module::make(Store* store_abs, const vec<byte_t>& binary) -> own<Module*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
auto context = store->context();
v8::HandleScope handle_scope(isolate);
auto array_buffer = v8::ArrayBuffer::New(
isolate, const_cast<byte_t*>(binary.get()), binary.size());
v8::Local<v8::Value> args[] = {array_buffer};
auto maybe_obj =
store->v8_function(V8_F_MODULE)->NewInstance(context, 1, args);
if (maybe_obj.IsEmpty()) return nullptr;
return RefImpl<Module>::make(store, maybe_obj.ToLocalChecked());
}
auto Module::imports() const -> vec<ImportType*> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto module = impl(this)->v8_object();
auto binary =
vec<byte_t>::adopt(v8::wasm::module_binary_size(module),
const_cast<byte_t*>(v8::wasm::module_binary(module)));
auto imports = wasm::bin::imports(binary);
binary.release();
return imports;
}
auto Module::exports() const -> vec<ExportType*> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto module = impl(this)->v8_object();
auto binary =
vec<byte_t>::adopt(v8::wasm::module_binary_size(module),
const_cast<byte_t*>(v8::wasm::module_binary(module)));
auto exports = wasm::bin::exports(binary);
binary.release();
return exports;
}
auto Module::serialize() const -> vec<byte_t> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto module = impl(this)->v8_object();
auto binary_size = v8::wasm::module_binary_size(module);
auto serial_size = v8::wasm::module_serialize_size(module);
auto size_size = i::wasm::LEBHelper::sizeof_u64v(binary_size);
auto buffer =
vec<byte_t>::make_uninitialized(size_size + binary_size + serial_size);
auto ptr = buffer.get();
i::wasm::LEBHelper::write_u64v(reinterpret_cast<uint8_t**>(&ptr),
binary_size);
std::memcpy(ptr, v8::wasm::module_binary(module), binary_size);
ptr += binary_size;
if (!v8::wasm::module_serialize(module, ptr, serial_size)) buffer.reset();
return std::move(buffer);
}
auto Module::deserialize(Store* store_abs, const vec<byte_t>& serialized)
-> own<Module*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto ptr = serialized.get();
auto binary_size = wasm::bin::u64(ptr);
auto size_size = ptr - serialized.get();
auto serial_size = serialized.size() - size_size - binary_size;
auto maybe_obj = v8::wasm::module_deserialize(isolate, ptr, binary_size,
ptr + binary_size, serial_size);
if (maybe_obj.IsEmpty()) return nullptr;
return RefImpl<Module>::make(store, maybe_obj.ToLocalChecked());
}
// TODO(v8): do better when V8 can do better.
template <>
struct implement<Shared<Module>> {
using type = vec<byte_t>;
};
template <>
Shared<Module>::~Shared() {
impl(this)->~vec();
}
template <>
void Shared<Module>::operator delete(void* p) {
::operator delete(p);
}
auto Module::share() const -> own<Shared<Module>*> {
auto shared = seal<Shared<Module>>(new vec<byte_t>(serialize()));
return make_own(shared);
}
auto Module::obtain(Store* store, const Shared<Module>* shared)
-> own<Module*> {
return Module::deserialize(store, *impl(shared));
}
// Externals
template <>
struct implement<Extern> {
using type = RefImpl<Extern>;
};
Extern::~Extern() {}
auto Extern::copy() const -> own<Extern*> { return impl(this)->copy(); }
auto Extern::kind() const -> ExternKind {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::extern_kind(impl(this)->v8_object());
}
auto Extern::type() const -> own<ExternType*> {
switch (kind()) {
case EXTERN_FUNC:
return func()->type();
case EXTERN_GLOBAL:
return global()->type();
case EXTERN_TABLE:
return table()->type();
case EXTERN_MEMORY:
return memory()->type();
}
}
auto Extern::func() -> Func* {
return kind() == EXTERN_FUNC ? static_cast<Func*>(this) : nullptr;
}
auto Extern::global() -> Global* {
return kind() == EXTERN_GLOBAL ? static_cast<Global*>(this) : nullptr;
}
auto Extern::table() -> Table* {
return kind() == EXTERN_TABLE ? static_cast<Table*>(this) : nullptr;
}
auto Extern::memory() -> Memory* {
return kind() == EXTERN_MEMORY ? static_cast<Memory*>(this) : nullptr;
}
auto Extern::func() const -> const Func* {
return kind() == EXTERN_FUNC ? static_cast<const Func*>(this) : nullptr;
}
auto Extern::global() const -> const Global* {
return kind() == EXTERN_GLOBAL ? static_cast<const Global*>(this) : nullptr;
}
auto Extern::table() const -> const Table* {
return kind() == EXTERN_TABLE ? static_cast<const Table*>(this) : nullptr;
}
auto Extern::memory() const -> const Memory* {
return kind() == EXTERN_MEMORY ? static_cast<const Memory*>(this) : nullptr;
}
auto extern_to_v8(const Extern* ex) -> v8::Local<v8::Value> {
return impl(ex)->v8_object();
}
// Function Instances
template <>
struct implement<Func> {
using type = RefImpl<Func>;
};
Func::~Func() {}
auto Func::copy() const -> own<Func*> { return impl(this)->copy(); }
struct FuncData {
Store* store;
own<FuncType*> type;
enum Kind { kCallback, kCallbackWithEnv } kind;
union {
Func::callback callback;
Func::callback_with_env callback_with_env;
};
void (*finalizer)(void*);
void* env;
FuncData(Store* store, const FuncType* type, Kind kind)
: store(store),
type(type->copy()),
kind(kind),
finalizer(nullptr),
env(nullptr) {}
~FuncData() {
if (finalizer) (*finalizer)(env);
}
static void v8_callback(const v8::FunctionCallbackInfo<v8::Value>&);
static void finalize_func_data(void* data);
};
namespace {
auto make_func(Store* store_abs, FuncData* data) -> own<Func*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto context = store->context();
// Create V8 function
auto v8_data = v8::wasm::foreign_new(isolate, data);
auto function_template =
v8::FunctionTemplate::New(isolate, &FuncData::v8_callback, v8_data);
auto maybe_func_obj = function_template->GetFunction(context);
if (maybe_func_obj.IsEmpty()) return own<Func*>();
auto func_obj = maybe_func_obj.ToLocalChecked();
// Create wrapper instance
auto binary = wasm::bin::wrapper(data->type.get());
auto module = Module::make(store_abs, binary);
auto imports_obj = v8::Object::New(isolate);
auto module_obj = v8::Object::New(isolate);
auto str = store->v8_string(V8_S_EMPTY);
ignore(imports_obj->DefineOwnProperty(context, str, module_obj));
ignore(module_obj->DefineOwnProperty(context, str, func_obj));
v8::Local<v8::Value> instantiate_args[] = {impl(module.get())->v8_object(),
imports_obj};
auto instance_obj = store->v8_function(V8_F_INSTANCE)
->NewInstance(context, 2, instantiate_args)
.ToLocalChecked();
assert(!instance_obj.IsEmpty());
assert(instance_obj->IsObject());
auto exports_obj = v8::wasm::instance_exports(instance_obj);
assert(!exports_obj.IsEmpty());
assert(exports_obj->IsObject());
auto wrapped_func_obj = v8::Local<v8::Function>::Cast(
exports_obj->Get(context, str).ToLocalChecked());
assert(!wrapped_func_obj.IsEmpty());
assert(wrapped_func_obj->IsFunction());
auto func = RefImpl<Func>::make(store, wrapped_func_obj);
func->set_host_info(data, &FuncData::finalize_func_data);
return func;
}
auto func_type(v8::Local<v8::Object> v8_func) -> own<FuncType*> {
auto param_arity = v8::wasm::func_type_param_arity(v8_func);
auto result_arity = v8::wasm::func_type_result_arity(v8_func);
auto params = vec<ValType*>::make_uninitialized(param_arity);
auto results = vec<ValType*>::make_uninitialized(result_arity);
for (size_t i = 0; i < params.size(); ++i) {
auto kind = v8::wasm::func_type_param(v8_func, i);
params[i] = ValType::make(kind);
}
for (size_t i = 0; i < results.size(); ++i) {
auto kind = v8::wasm::func_type_result(v8_func, i);
results[i] = ValType::make(kind);
}
return FuncType::make(std::move(params), std::move(results));
}
} // namespace
auto Func::make(Store* store, const FuncType* type, Func::callback callback)
-> own<Func*> {
auto data = new FuncData(store, type, FuncData::kCallback);
data->callback = callback;
return make_func(store, data);
}
auto Func::make(Store* store, const FuncType* type, callback_with_env callback,
void* env, void (*finalizer)(void*)) -> own<Func*> {
auto data = new FuncData(store, type, FuncData::kCallbackWithEnv);
data->callback_with_env = callback;
data->env = env;
data->finalizer = finalizer;
return make_func(store, data);
}
auto Func::type() const -> own<FuncType*> {
// return impl(this)->data->type->copy();
v8::HandleScope handle_scope(impl(this)->isolate());
return func_type(impl(this)->v8_object());
}
auto Func::param_arity() const -> size_t {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::func_type_param_arity(impl(this)->v8_object());
}
auto Func::result_arity() const -> size_t {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::func_type_result_arity(impl(this)->v8_object());
}
auto Func::call(const Val args[], Val results[]) const -> own<Trap*> {
auto func = impl(this);
auto store = func->store();
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto context = store->context();
auto type = this->type();
auto& param_types = type->params();
auto& result_types = type->results();
// TODO(rossberg): cache v8_args array per thread.
auto v8_args = std::unique_ptr<v8::Local<v8::Value>[]>(
new (std::nothrow) v8::Local<v8::Value>[param_types.size()]);
for (size_t i = 0; i < param_types.size(); ++i) {
assert(args[i].kind() == param_types[i]->kind());
v8_args[i] = val_to_v8(store, args[i]);
}
v8::TryCatch handler(isolate);
auto v8_function = v8::Local<v8::Function>::Cast(func->v8_object());
auto maybe_val =
v8_function->Call(context, v8::Undefined(isolate),
static_cast<int>(param_types.size()), v8_args.get());
if (handler.HasCaught()) {
auto exception = handler.Exception();
if (!exception->IsObject()) {
auto maybe_string = exception->ToString(store->context());
auto string = maybe_string.IsEmpty() ? store->v8_string(V8_S_EMPTY)
: maybe_string.ToLocalChecked();
exception = v8::Exception::Error(string);
}
return RefImpl<Trap>::make(store, v8::Local<v8::Object>::Cast(exception));
}
auto val = maybe_val.ToLocalChecked();
if (result_types.size() == 0) {
assert(val->IsUndefined());
} else if (result_types.size() == 1) {
assert(!val->IsUndefined());
new (&results[0]) Val(v8_to_val(store, val, result_types[0]));
} else {
WASM_UNIMPLEMENTED("multiple results");
}
return nullptr;
}
void FuncData::v8_callback(const v8::FunctionCallbackInfo<v8::Value>& info) {
auto self = reinterpret_cast<FuncData*>(v8::wasm::foreign_get(info.Data()));
auto store = impl(self->store);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto& param_types = self->type->params();
auto& result_types = self->type->results();
assert(param_types.size() == static_cast<size_t>(info.Length()));
int num_param_types = static_cast<int>(param_types.size());
int num_result_types = static_cast<int>(result_types.size());
// TODO(rossberg): cache params and result arrays per thread.
std::unique_ptr<Val[]> args(new Val[num_param_types]);
std::unique_ptr<Val[]> results(new Val[num_result_types]);
for (int i = 0; i < num_param_types; ++i) {
args[i] = v8_to_val(store, info[i], param_types[i]);
}
own<Trap*> trap;
if (self->kind == kCallbackWithEnv) {
trap = self->callback_with_env(self->env, args.get(), results.get());
} else {
trap = self->callback(args.get(), results.get());
}
if (trap) {
isolate->ThrowException(impl(trap.get())->v8_object());
return;
}
auto ret = info.GetReturnValue();
if (result_types.size() == 0) {
ret.SetUndefined();
} else if (result_types.size() == 1) {
assert(results[0].kind() == result_types[0]->kind());
ret.Set(val_to_v8(store, results[0]));
} else {
WASM_UNIMPLEMENTED("multiple results");
}
}
void FuncData::finalize_func_data(void* data) {
delete reinterpret_cast<FuncData*>(data);
}
// Global Instances
template <>
struct implement<Global> {
using type = RefImpl<Global>;
};
Global::~Global() {}
auto Global::copy() const -> own<Global*> { return impl(this)->copy(); }
auto Global::make(Store* store_abs, const GlobalType* type, const Val& val)
-> own<Global*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto context = store->context();
assert(type->content()->kind() == val.kind());
// Create wrapper instance
auto binary = wasm::bin::wrapper(type);
auto module = Module::make(store_abs, binary);
v8::Local<v8::Value> instantiate_args[] = {impl(module.get())->v8_object()};
auto instance_obj = store->v8_function(V8_F_INSTANCE)
->NewInstance(context, 1, instantiate_args)
.ToLocalChecked();
auto exports_obj = v8::wasm::instance_exports(instance_obj);
auto obj = v8::Local<v8::Object>::Cast(
exports_obj->Get(context, store->v8_string(V8_S_EMPTY)).ToLocalChecked());
assert(!obj.IsEmpty() && obj->IsObject());
auto global = RefImpl<Global>::make(store, obj);
assert(global);
global->set(val);
return global;
}
auto Global::type() const -> own<GlobalType*> {
// return impl(this)->data->type->copy();
v8::HandleScope handle_scope(impl(this)->isolate());
auto v8_global = impl(this)->v8_object();
auto kind = v8::wasm::global_type_content(v8_global);
auto mutability = v8::wasm::global_type_mutable(v8_global) ? VAR : CONST;
return GlobalType::make(ValType::make(kind), mutability);
}
auto Global::get() const -> Val {
v8::HandleScope handle_scope(impl(this)->isolate());
auto v8_global = impl(this)->v8_object();
switch (type()->content()->kind()) {
case I32:
return Val(v8::wasm::global_get_i32(v8_global));
case I64:
return Val(v8::wasm::global_get_i64(v8_global));
case F32:
return Val(v8::wasm::global_get_f32(v8_global));
case F64:
return Val(v8::wasm::global_get_f64(v8_global));
case ANYREF:
case FUNCREF:
WASM_UNIMPLEMENTED("globals of reference type");
default:
// TODO(wasm+): support new value types
UNREACHABLE();
}
}
void Global::set(const Val& val) {
v8::HandleScope handle_scope(impl(this)->isolate());
auto v8_global = impl(this)->v8_object();
switch (val.kind()) {
case I32:
return v8::wasm::global_set_i32(v8_global, val.i32());
case I64:
return v8::wasm::global_set_i64(v8_global, val.i64());
case F32:
return v8::wasm::global_set_f32(v8_global, val.f32());
case F64:
return v8::wasm::global_set_f64(v8_global, val.f64());
case ANYREF:
case FUNCREF:
WASM_UNIMPLEMENTED("globals of reference type");
default:
// TODO(wasm+): support new value types
UNREACHABLE();
}
}
// Table Instances
template <>
struct implement<Table> {
using type = RefImpl<Table>;
};
Table::~Table() {}
auto Table::copy() const -> own<Table*> { return impl(this)->copy(); }
auto Table::make(Store* store_abs, const TableType* type, const Ref* ref)
-> own<Table*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto context = store->context();
v8::Local<v8::Value> init = v8::Null(isolate);
if (ref) init = impl(ref)->v8_object();
v8::Local<v8::Value> args[] = {tabletype_to_v8(store, type), init};
auto maybe_obj =
store->v8_function(V8_F_TABLE)->NewInstance(context, 2, args);
if (maybe_obj.IsEmpty()) return own<Table*>();
auto table = RefImpl<Table>::make(store, maybe_obj.ToLocalChecked());
// TODO(wasm+): pass reference initialiser as parameter
if (table && ref) {
auto size = type->limits().min;
auto obj = maybe_obj.ToLocalChecked();
auto maybe_func =
v8::MaybeLocal<v8::Function>(v8::Local<v8::Function>::Cast(init));
for (size_t i = 0; i < size; ++i) {
v8::wasm::table_set(obj, i, maybe_func);
}
}
return table;
}
auto Table::type() const -> own<TableType*> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto v8_table = impl(this)->v8_object();
uint32_t min = v8::wasm::table_type_min(v8_table);
uint32_t max = v8::wasm::table_type_max(v8_table);
// TODO(wasm+): support new element types.
return TableType::make(ValType::make(FUNCREF), Limits(min, max));
}
auto Table::get(size_t index) const -> own<Ref*> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto maybe = v8::wasm::table_get(impl(this)->v8_object(), index);
if (maybe.IsEmpty() || maybe.ToLocalChecked()->IsNull()) return own<Ref*>();
// TODO(wasm+): other references
auto obj = maybe.ToLocalChecked();
assert(obj->IsFunction());
return RefImpl<Func>::make(impl(this)->store(), obj);
}
auto Table::set(size_t index, const Ref* ref) -> bool {
v8::HandleScope handle_scope(impl(this)->isolate());
if (ref && !impl(ref)->v8_object()->IsFunction()) {
WASM_UNIMPLEMENTED("non-function table elements");
}
auto obj = ref ? v8::MaybeLocal<v8::Function>(
v8::Local<v8::Function>::Cast(impl(ref)->v8_object()))
: v8::MaybeLocal<v8::Function>();
return v8::wasm::table_set(impl(this)->v8_object(), index, obj);
}
auto Table::size() const -> size_t {
v8::HandleScope handle_scope(impl(this)->isolate());
// TODO(jkummerow): Having Table::size_t shadowing "std" size_t is ugly.
return static_cast<Table::size_t>(
v8::wasm::table_size(impl(this)->v8_object()));
}
auto Table::grow(size_t delta, const Ref* ref) -> bool {
v8::HandleScope handle_scope(impl(this)->isolate());
auto obj = ref ? v8::MaybeLocal<v8::Function>(
v8::Local<v8::Function>::Cast(impl(ref)->v8_object()))
: v8::MaybeLocal<v8::Function>();
return v8::wasm::table_grow(impl(this)->v8_object(), delta, obj);
}
// Memory Instances
template <>
struct implement<Memory> {
using type = RefImpl<Memory>;
};
Memory::~Memory() {}
auto Memory::copy() const -> own<Memory*> { return impl(this)->copy(); }
auto Memory::make(Store* store_abs, const MemoryType* type) -> own<Memory*> {
auto store = impl(store_abs);
auto isolate = store->isolate();
v8::HandleScope handle_scope(isolate);
auto context = store->context();
v8::Local<v8::Value> args[] = {memorytype_to_v8(store, type)};
auto maybe_obj =
store->v8_function(V8_F_MEMORY)->NewInstance(context, 1, args);
if (maybe_obj.IsEmpty()) return own<Memory*>();
return RefImpl<Memory>::make(store, maybe_obj.ToLocalChecked());
}
auto Memory::type() const -> own<MemoryType*> {
v8::HandleScope handle_scope(impl(this)->isolate());
auto v8_memory = impl(this)->v8_object();
uint32_t min = v8::wasm::memory_type_min(v8_memory);
uint32_t max = v8::wasm::memory_type_max(v8_memory);
return MemoryType::make(Limits(min, max));
}
auto Memory::data() const -> byte_t* {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::memory_data(impl(this)->v8_object());
}
auto Memory::data_size() const -> size_t {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::memory_data_size(impl(this)->v8_object());
}
auto Memory::size() const -> pages_t {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::memory_size(impl(this)->v8_object());
}
auto Memory::grow(pages_t delta) -> bool {
v8::HandleScope handle_scope(impl(this)->isolate());
return v8::wasm::memory_grow(impl(this)->v8_object(), delta);
}
// Module Instances
template <>
struct implement<Instance> {
using type = RefImpl<Instance>;
};
Instance::~Instance() {}
auto Instance::copy() const -> own<Instance*> { return impl(this)->copy(); }
auto Instance::make(Store* store_abs, const Module* module_abs,
const Extern* const imports[]) -> own<Instance*> {
auto store = impl(store_abs);
auto module = impl(module_abs);
auto isolate = store->isolate();
auto context = store->context();
v8::HandleScope handle_scope(isolate);
assert(module->v8_object()->GetIsolate() == isolate);
auto import_types = module_abs->imports();
auto imports_obj = v8::Object::New(isolate);
for (size_t i = 0; i < import_types.size(); ++i) {
auto type = import_types[i];
auto maybe_module = v8::String::NewFromOneByte(
isolate, reinterpret_cast<const uint8_t*>(type->module().get()),
v8::NewStringType::kNormal, static_cast<int>(type->module().size()));
if (maybe_module.IsEmpty()) return own<Instance*>();
auto module_str = maybe_module.ToLocalChecked();
auto maybe_name = v8::String::NewFromOneByte(
isolate, reinterpret_cast<const uint8_t*>(type->name().get()),
v8::NewStringType::kNormal, static_cast<int>(type->name().size()));
if (maybe_name.IsEmpty()) return own<Instance*>();
auto name_str = maybe_name.ToLocalChecked();
v8::Local<v8::Object> module_obj;
if (imports_obj->HasOwnProperty(context, module_str).ToChecked()) {
module_obj = v8::Local<v8::Object>::Cast(
imports_obj->Get(context, module_str).ToLocalChecked());
} else {
module_obj = v8::Object::New(isolate);
ignore(imports_obj->DefineOwnProperty(context, module_str, module_obj));
}
ignore(module_obj->DefineOwnProperty(context, name_str,
extern_to_v8(imports[i])));
}
v8::Local<v8::Value> instantiate_args[] = {module->v8_object(), imports_obj};
auto obj = store->v8_function(V8_F_INSTANCE)
->NewInstance(context, 2, instantiate_args)
.ToLocalChecked();
return RefImpl<Instance>::make(store, obj);
}
auto Instance::exports() const -> vec<Extern*> {
auto instance = impl(this);
auto store = instance->store();
auto isolate = store->isolate();
auto context = store->context();
v8::HandleScope handle_scope(isolate);
auto module_obj = v8::wasm::instance_module(instance->v8_object());
auto exports_obj = v8::wasm::instance_exports(instance->v8_object());
assert(!module_obj.IsEmpty() && module_obj->IsObject());
assert(!exports_obj.IsEmpty() && exports_obj->IsObject());
auto module = RefImpl<Module>::make(store, module_obj);
auto export_types = module->exports();
auto exports = vec<Extern*>::make_uninitialized(export_types.size());
if (!exports) return vec<Extern*>::invalid();
for (size_t i = 0; i < export_types.size(); ++i) {
auto& name = export_types[i]->name();
auto maybe_name_obj =
v8::String::NewFromUtf8(isolate, name.get(), v8::NewStringType::kNormal,
static_cast<int>(name.size()));
if (maybe_name_obj.IsEmpty()) return vec<Extern*>::invalid();
auto name_obj = maybe_name_obj.ToLocalChecked();
auto obj = v8::Local<v8::Object>::Cast(
exports_obj->Get(context, name_obj).ToLocalChecked());
auto type = export_types[i]->type();
assert(type->kind() == v8::wasm::extern_kind(obj));
switch (type->kind()) {
case EXTERN_FUNC: {
exports[i].reset(RefImpl<Func>::make(store, obj));
} break;
case EXTERN_GLOBAL: {
exports[i].reset(RefImpl<Global>::make(store, obj));
} break;
case EXTERN_TABLE: {
exports[i].reset(RefImpl<Table>::make(store, obj));
} break;
case EXTERN_MEMORY: {
exports[i].reset(RefImpl<Memory>::make(store, obj));
} break;
}
}
return exports;
}
///////////////////////////////////////////////////////////////////////////////
} // namespace wasm
// BEGIN FILE wasm-c.cc
extern "C" {
///////////////////////////////////////////////////////////////////////////////
// Auxiliaries
// Backing implementation
extern "C++" {
template <class T>
struct borrowed_vec {
wasm::vec<T> it;
explicit borrowed_vec(wasm::vec<T>&& v) : it(std::move(v)) {}
borrowed_vec(borrowed_vec<T>&& that) : it(std::move(that.it)) {}
~borrowed_vec() { it.release(); }
};
} // extern "C++"
#define WASM_DEFINE_OWN(name, Name) \
struct wasm_##name##_t : Name {}; \
\
void wasm_##name##_delete(wasm_##name##_t* x) { delete x; } \
\
extern "C++" inline auto hide(Name* x)->wasm_##name##_t* { \
return static_cast<wasm_##name##_t*>(x); \
} \
extern "C++" inline auto hide(const Name* x)->const wasm_##name##_t* { \
return static_cast<const wasm_##name##_t*>(x); \
} \
extern "C++" inline auto reveal(wasm_##name##_t* x)->Name* { return x; } \
extern "C++" inline auto reveal(const wasm_##name##_t* x)->const Name* { \
return x; \
} \
extern "C++" inline auto get(wasm::own<Name*>& x)->wasm_##name##_t* { \
return hide(x.get()); \
} \
extern "C++" inline auto get(const wasm::own<Name*>& x) \
->const wasm_##name##_t* { \
return hide(x.get()); \
} \
extern "C++" inline auto release(wasm::own<Name*>&& x)->wasm_##name##_t* { \
return hide(x.release()); \
} \
extern "C++" inline auto adopt(wasm_##name##_t* x)->wasm::own<Name*> { \
return make_own(x); \
}
// Vectors
#define WASM_DEFINE_VEC_BASE(name, Name, ptr_or_none) \
extern "C++" inline auto hide(wasm::vec<Name ptr_or_none>& v) \
->wasm_##name##_vec_t* { \
static_assert(sizeof(wasm_##name##_vec_t) == sizeof(wasm::vec<Name>), \
"C/C++ incompatibility"); \
return reinterpret_cast<wasm_##name##_vec_t*>(&v); \
} \
extern "C++" inline auto hide(const wasm::vec<Name ptr_or_none>& v) \
->const wasm_##name##_vec_t* { \
static_assert(sizeof(wasm_##name##_vec_t) == sizeof(wasm::vec<Name>), \
"C/C++ incompatibility"); \
return reinterpret_cast<const wasm_##name##_vec_t*>(&v); \
} \
extern "C++" inline auto hide(Name ptr_or_none* v) \
->wasm_##name##_t ptr_or_none* { \
static_assert( \
sizeof(wasm_##name##_t ptr_or_none) == sizeof(Name ptr_or_none), \
"C/C++ incompatibility"); \
return reinterpret_cast<wasm_##name##_t ptr_or_none*>(v); \
} \
extern "C++" inline auto hide(Name ptr_or_none const* v) \
->wasm_##name##_t ptr_or_none const* { \
static_assert( \
sizeof(wasm_##name##_t ptr_or_none) == sizeof(Name ptr_or_none), \
"C/C++ incompatibility"); \
return reinterpret_cast<wasm_##name##_t ptr_or_none const*>(v); \
} \
extern "C++" inline auto reveal(wasm_##name##_t ptr_or_none* v) \
->Name ptr_or_none* { \
static_assert( \
sizeof(wasm_##name##_t ptr_or_none) == sizeof(Name ptr_or_none), \
"C/C++ incompatibility"); \
return reinterpret_cast<Name ptr_or_none*>(v); \
} \
extern "C++" inline auto reveal(wasm_##name##_t ptr_or_none const* v) \
->Name ptr_or_none const* { \
static_assert( \
sizeof(wasm_##name##_t ptr_or_none) == sizeof(Name ptr_or_none), \
"C/C++ incompatibility"); \
return reinterpret_cast<Name ptr_or_none const*>(v); \
} \
extern "C++" inline auto get(wasm::vec<Name ptr_or_none>& v) \
->wasm_##name##_vec_t { \
wasm_##name##_vec_t v2 = {v.size(), hide(v.get())}; \
return v2; \
} \
extern "C++" inline auto get(const wasm::vec<Name ptr_or_none>& v) \
->const wasm_##name##_vec_t { \
wasm_##name##_vec_t v2 = { \
v.size(), const_cast<wasm_##name##_t ptr_or_none*>(hide(v.get()))}; \
return v2; \
} \
extern "C++" inline auto release(wasm::vec<Name ptr_or_none>&& v) \
->wasm_##name##_vec_t { \
wasm_##name##_vec_t v2 = {v.size(), hide(v.release())}; \
return v2; \
} \
extern "C++" inline auto adopt(wasm_##name##_vec_t* v) \
->wasm::vec<Name ptr_or_none> { \
return wasm::vec<Name ptr_or_none>::adopt(v->size, reveal(v->data)); \
} \
extern "C++" inline auto borrow(const wasm_##name##_vec_t* v) \
->borrowed_vec<Name ptr_or_none> { \
return borrowed_vec<Name ptr_or_none>( \
wasm::vec<Name ptr_or_none>::adopt(v->size, reveal(v->data))); \
} \
\
void wasm_##name##_vec_new_uninitialized(wasm_##name##_vec_t* out, \
size_t size) { \
*out = release(wasm::vec<Name ptr_or_none>::make_uninitialized(size)); \
} \
void wasm_##name##_vec_new_empty(wasm_##name##_vec_t* out) { \
wasm_##name##_vec_new_uninitialized(out, 0); \
} \
\
void wasm_##name##_vec_delete(wasm_##name##_vec_t* v) { adopt(v); }
// Vectors with no ownership management of elements
#define WASM_DEFINE_VEC_PLAIN(name, Name, ptr_or_none) \
WASM_DEFINE_VEC_BASE(name, Name, ptr_or_none) \
\
void wasm_##name##_vec_new(wasm_##name##_vec_t* out, size_t size, \
wasm_##name##_t ptr_or_none const data[]) { \
auto v2 = wasm::vec<Name ptr_or_none>::make_uninitialized(size); \
if (v2.size() != 0) { \
memcpy(v2.get(), data, size * sizeof(wasm_##name##_t ptr_or_none)); \
} \
*out = release(std::move(v2)); \
} \
\
void wasm_##name##_vec_copy(wasm_##name##_vec_t* out, \
wasm_##name##_vec_t* v) { \
wasm_##name##_vec_new(out, v->size, v->data); \
}
// Vectors who own their elements
#define WASM_DEFINE_VEC(name, Name, ptr_or_none) \
WASM_DEFINE_VEC_BASE(name, Name, ptr_or_none) \
\
void wasm_##name##_vec_new(wasm_##name##_vec_t* out, size_t size, \
wasm_##name##_t ptr_or_none const data[]) { \
auto v2 = wasm::vec<Name ptr_or_none>::make_uninitialized(size); \
for (size_t i = 0; i < v2.size(); ++i) { \
v2[i] = adopt(data[i]); \
} \
*out = release(std::move(v2)); \
} \
\
void wasm_##name##_vec_copy(wasm_##name##_vec_t* out, \
wasm_##name##_vec_t* v) { \
auto v2 = wasm::vec<Name ptr_or_none>::make_uninitialized(v->size); \
for (size_t i = 0; i < v2.size(); ++i) { \
v2[i] = adopt(wasm_##name##_copy(v->data[i])); \
} \
*out = release(std::move(v2)); \
}
extern "C++" {
template <class T>
inline auto is_empty(T* p) -> bool {
return !p;
}
}
// Byte vectors
using byte = byte_t;
WASM_DEFINE_VEC_PLAIN(byte, byte, )
///////////////////////////////////////////////////////////////////////////////
// Runtime Environment
// Configuration
WASM_DEFINE_OWN(config, wasm::Config)
wasm_config_t* wasm_config_new() { return release(wasm::Config::make()); }
// Engine
WASM_DEFINE_OWN(engine, wasm::Engine)
wasm_engine_t* wasm_engine_new() { return release(wasm::Engine::make()); }
wasm_engine_t* wasm_engine_new_with_config(wasm_config_t* config) {
return release(wasm::Engine::make(adopt(config)));
}
// Stores
WASM_DEFINE_OWN(store, wasm::Store)
wasm_store_t* wasm_store_new(wasm_engine_t* engine) {
return release(wasm::Store::make(engine));
}
///////////////////////////////////////////////////////////////////////////////
// Type Representations
// Type attributes
extern "C++" inline auto hide(wasm::Mutability mutability)
-> wasm_mutability_t {
return static_cast<wasm_mutability_t>(mutability);
}
extern "C++" inline auto reveal(wasm_mutability_t mutability)
-> wasm::Mutability {
return static_cast<wasm::Mutability>(mutability);
}
extern "C++" inline auto hide(const wasm::Limits& limits)
-> const wasm_limits_t* {
return reinterpret_cast<const wasm_limits_t*>(&limits);
}
extern "C++" inline auto reveal(wasm_limits_t limits) -> wasm::Limits {
return wasm::Limits(limits.min, limits.max);
}
extern "C++" inline auto hide(wasm::ValKind kind) -> wasm_valkind_t {
return static_cast<wasm_valkind_t>(kind);
}
extern "C++" inline auto reveal(wasm_valkind_t kind) -> wasm::ValKind {
return static_cast<wasm::ValKind>(kind);
}
extern "C++" inline auto hide(wasm::ExternKind kind) -> wasm_externkind_t {
return static_cast<wasm_externkind_t>(kind);
}
extern "C++" inline auto reveal(wasm_externkind_t kind) -> wasm::ExternKind {
return static_cast<wasm::ExternKind>(kind);
}
// Generic
#define WASM_DEFINE_TYPE(name, Name) \
WASM_DEFINE_OWN(name, Name) \
WASM_DEFINE_VEC(name, Name, *) \
\
wasm_##name##_t* wasm_##name##_copy(wasm_##name##_t* t) { \
return release(t->copy()); \
}
// Value Types
WASM_DEFINE_TYPE(valtype, wasm::ValType)
wasm_valtype_t* wasm_valtype_new(wasm_valkind_t k) {
return release(wasm::ValType::make(reveal(k)));
}
wasm_valkind_t wasm_valtype_kind(const wasm_valtype_t* t) {
return hide(t->kind());
}
// Function Types
WASM_DEFINE_TYPE(functype, wasm::FuncType)
wasm_functype_t* wasm_functype_new(wasm_valtype_vec_t* params,
wasm_valtype_vec_t* results) {
return release(wasm::FuncType::make(adopt(params), adopt(results)));
}
const wasm_valtype_vec_t* wasm_functype_params(const wasm_functype_t* ft) {
return hide(ft->params());
}
const wasm_valtype_vec_t* wasm_functype_results(const wasm_functype_t* ft) {
return hide(ft->results());
}
// Global Types
WASM_DEFINE_TYPE(globaltype, wasm::GlobalType)
wasm_globaltype_t* wasm_globaltype_new(wasm_valtype_t* content,
wasm_mutability_t mutability) {
return release(wasm::GlobalType::make(adopt(content), reveal(mutability)));
}
const wasm_valtype_t* wasm_globaltype_content(const wasm_globaltype_t* gt) {
return hide(gt->content());
}
wasm_mutability_t wasm_globaltype_mutability(const wasm_globaltype_t* gt) {
return hide(gt->mutability());
}
// Table Types
WASM_DEFINE_TYPE(tabletype, wasm::TableType)
wasm_tabletype_t* wasm_tabletype_new(wasm_valtype_t* element,
const wasm_limits_t* limits) {
return release(wasm::TableType::make(adopt(element), reveal(*limits)));
}
const wasm_valtype_t* wasm_tabletype_element(const wasm_tabletype_t* tt) {
return hide(tt->element());
}
const wasm_limits_t* wasm_tabletype_limits(const wasm_tabletype_t* tt) {
return hide(tt->limits());
}
// Memory Types
WASM_DEFINE_TYPE(memorytype, wasm::MemoryType)
wasm_memorytype_t* wasm_memorytype_new(const wasm_limits_t* limits) {
return release(wasm::MemoryType::make(reveal(*limits)));
}
const wasm_limits_t* wasm_memorytype_limits(const wasm_memorytype_t* mt) {
return hide(mt->limits());
}
// Extern Types
WASM_DEFINE_TYPE(externtype, wasm::ExternType)
wasm_externkind_t wasm_externtype_kind(const wasm_externtype_t* et) {
return hide(et->kind());
}
wasm_externtype_t* wasm_functype_as_externtype(wasm_functype_t* ft) {
return hide(static_cast<wasm::ExternType*>(ft));
}
wasm_externtype_t* wasm_globaltype_as_externtype(wasm_globaltype_t* gt) {
return hide(static_cast<wasm::ExternType*>(gt));
}
wasm_externtype_t* wasm_tabletype_as_externtype(wasm_tabletype_t* tt) {
return hide(static_cast<wasm::ExternType*>(tt));
}
wasm_externtype_t* wasm_memorytype_as_externtype(wasm_memorytype_t* mt) {
return hide(static_cast<wasm::ExternType*>(mt));
}
const wasm_externtype_t* wasm_functype_as_externtype_const(
const wasm_functype_t* ft) {
return hide(static_cast<const wasm::ExternType*>(ft));
}
const wasm_externtype_t* wasm_globaltype_as_externtype_const(
const wasm_globaltype_t* gt) {
return hide(static_cast<const wasm::ExternType*>(gt));
}
const wasm_externtype_t* wasm_tabletype_as_externtype_const(
const wasm_tabletype_t* tt) {
return hide(static_cast<const wasm::ExternType*>(tt));
}
const wasm_externtype_t* wasm_memorytype_as_externtype_const(
const wasm_memorytype_t* mt) {
return hide(static_cast<const wasm::ExternType*>(mt));
}
wasm_functype_t* wasm_externtype_as_functype(wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_FUNC
? hide(static_cast<wasm::FuncType*>(reveal(et)))
: nullptr;
}
wasm_globaltype_t* wasm_externtype_as_globaltype(wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_GLOBAL
? hide(static_cast<wasm::GlobalType*>(reveal(et)))
: nullptr;
}
wasm_tabletype_t* wasm_externtype_as_tabletype(wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_TABLE
? hide(static_cast<wasm::TableType*>(reveal(et)))
: nullptr;
}
wasm_memorytype_t* wasm_externtype_as_memorytype(wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_MEMORY
? hide(static_cast<wasm::MemoryType*>(reveal(et)))
: nullptr;
}
const wasm_functype_t* wasm_externtype_as_functype_const(
const wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_FUNC
? hide(static_cast<const wasm::FuncType*>(reveal(et)))
: nullptr;
}
const wasm_globaltype_t* wasm_externtype_as_globaltype_const(
const wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_GLOBAL
? hide(static_cast<const wasm::GlobalType*>(reveal(et)))
: nullptr;
}
const wasm_tabletype_t* wasm_externtype_as_tabletype_const(
const wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_TABLE
? hide(static_cast<const wasm::TableType*>(reveal(et)))
: nullptr;
}
const wasm_memorytype_t* wasm_externtype_as_memorytype_const(
const wasm_externtype_t* et) {
return et->kind() == wasm::EXTERN_MEMORY
? hide(static_cast<const wasm::MemoryType*>(reveal(et)))
: nullptr;
}
// Import Types
WASM_DEFINE_TYPE(importtype, wasm::ImportType)
wasm_importtype_t* wasm_importtype_new(wasm_name_t* module, wasm_name_t* name,
wasm_externtype_t* type) {
return release(
wasm::ImportType::make(adopt(module), adopt(name), adopt(type)));
}
const wasm_name_t* wasm_importtype_module(const wasm_importtype_t* it) {
return hide(it->module());
}
const wasm_name_t* wasm_importtype_name(const wasm_importtype_t* it) {
return hide(it->name());
}
const wasm_externtype_t* wasm_importtype_type(const wasm_importtype_t* it) {
return hide(it->type());
}
// Export Types
WASM_DEFINE_TYPE(exporttype, wasm::ExportType)
wasm_exporttype_t* wasm_exporttype_new(wasm_name_t* name,
wasm_externtype_t* type) {
return release(wasm::ExportType::make(adopt(name), adopt(type)));
}
const wasm_name_t* wasm_exporttype_name(const wasm_exporttype_t* et) {
return hide(et->name());
}
const wasm_externtype_t* wasm_exporttype_type(const wasm_exporttype_t* et) {
return hide(et->type());
}
///////////////////////////////////////////////////////////////////////////////
// Runtime Values
// References
#define WASM_DEFINE_REF_BASE(name, Name) \
WASM_DEFINE_OWN(name, Name) \
\
wasm_##name##_t* wasm_##name##_copy(const wasm_##name##_t* t) { \
return release(t->copy()); \
} \
\
void* wasm_##name##_get_host_info(const wasm_##name##_t* r) { \
return r->get_host_info(); \
} \
void wasm_##name##_set_host_info(wasm_##name##_t* r, void* info) { \
r->set_host_info(info); \
} \
void wasm_##name##_set_host_info_with_finalizer( \
wasm_##name##_t* r, void* info, void (*finalizer)(void*)) { \
r->set_host_info(info, finalizer); \
}
#define WASM_DEFINE_REF(name, Name) \
WASM_DEFINE_REF_BASE(name, Name) \
\
wasm_ref_t* wasm_##name##_as_ref(wasm_##name##_t* r) { \
return hide(static_cast<wasm::Ref*>(reveal(r))); \
} \
wasm_##name##_t* wasm_ref_as_##name(wasm_ref_t* r) { \
return hide(static_cast<Name*>(reveal(r))); \
} \
\
const wasm_ref_t* wasm_##name##_as_ref_const(const wasm_##name##_t* r) { \
return hide(static_cast<const wasm::Ref*>(reveal(r))); \
} \
const wasm_##name##_t* wasm_ref_as_##name##_const(const wasm_ref_t* r) { \
return hide(static_cast<const Name*>(reveal(r))); \
}
#define WASM_DEFINE_SHARABLE_REF(name, Name) \
WASM_DEFINE_REF(name, Name) \
WASM_DEFINE_OWN(shared_##name, wasm::Shared<Name>)
WASM_DEFINE_REF_BASE(ref, wasm::Ref)
// Values
extern "C++" {
inline auto is_empty(wasm_val_t v) -> bool {
return !is_ref(reveal(v.kind)) || !v.of.ref;
}
inline auto hide(wasm::Val v) -> wasm_val_t {
wasm_val_t v2 = {hide(v.kind()), {}};
switch (v.kind()) {
case wasm::I32:
v2.of.i32 = v.i32();
break;
case wasm::I64:
v2.of.i64 = v.i64();
break;
case wasm::F32:
v2.of.f32 = v.f32();
break;
case wasm::F64:
v2.of.f64 = v.f64();
break;
case wasm::ANYREF:
case wasm::FUNCREF:
v2.of.ref = hide(v.ref());
break;
default:
UNREACHABLE();
}
return v2;
}
inline auto release(wasm::Val v) -> wasm_val_t {
wasm_val_t v2 = {hide(v.kind()), {}};
switch (v.kind()) {
case wasm::I32:
v2.of.i32 = v.i32();
break;
case wasm::I64:
v2.of.i64 = v.i64();
break;
case wasm::F32:
v2.of.f32 = v.f32();
break;
case wasm::F64:
v2.of.f64 = v.f64();
break;
case wasm::ANYREF:
case wasm::FUNCREF:
v2.of.ref = release(v.release_ref());
break;
default:
UNREACHABLE();
}
return v2;
}
inline auto adopt(wasm_val_t v) -> wasm::Val {
switch (reveal(v.kind)) {
case wasm::I32:
return wasm::Val(v.of.i32);
case wasm::I64:
return wasm::Val(v.of.i64);
case wasm::F32:
return wasm::Val(v.of.f32);
case wasm::F64:
return wasm::Val(v.of.f64);
case wasm::ANYREF:
case wasm::FUNCREF:
return wasm::Val(adopt(v.of.ref));
default:
UNREACHABLE();
}
}
struct borrowed_val {
wasm::Val it;
explicit borrowed_val(wasm::Val&& v) : it(std::move(v)) {}
borrowed_val(borrowed_val&& that) : it(std::move(that.it)) {}
~borrowed_val() {
if (it.is_ref()) it.release_ref();
}
};
inline auto borrow(const wasm_val_t* v) -> borrowed_val {
wasm::Val v2;
switch (reveal(v->kind)) {
case wasm::I32:
v2 = wasm::Val(v->of.i32);
break;
case wasm::I64:
v2 = wasm::Val(v->of.i64);
break;
case wasm::F32:
v2 = wasm::Val(v->of.f32);
break;
case wasm::F64:
v2 = wasm::Val(v->of.f64);
break;
case wasm::ANYREF:
case wasm::FUNCREF:
v2 = wasm::Val(adopt(v->of.ref));
break;
default:
UNREACHABLE();
}
return borrowed_val(std::move(v2));
}
} // extern "C++"
WASM_DEFINE_VEC_BASE(val, wasm::Val, )
void wasm_val_vec_new(wasm_val_vec_t* out, size_t size,
wasm_val_t const data[]) {
auto v2 = wasm::vec<wasm::Val>::make_uninitialized(size);
for (size_t i = 0; i < v2.size(); ++i) {
v2[i] = adopt(data[i]);
}
*out = release(std::move(v2));
}
void wasm_val_vec_copy(wasm_val_vec_t* out, wasm_val_vec_t* v) {
auto v2 = wasm::vec<wasm::Val>::make_uninitialized(v->size);
for (size_t i = 0; i < v2.size(); ++i) {
wasm_val_t val;
wasm_val_copy(&v->data[i], &val);
v2[i] = adopt(val);
}
*out = release(std::move(v2));
}
void wasm_val_delete(wasm_val_t* v) {
if (is_ref(reveal(v->kind))) adopt(v->of.ref);
}
void wasm_val_copy(wasm_val_t* out, const wasm_val_t* v) {
*out = *v;
if (is_ref(reveal(v->kind))) {
out->of.ref = release(v->of.ref->copy());
}
}
///////////////////////////////////////////////////////////////////////////////
// Runtime Objects
// Traps
WASM_DEFINE_REF(trap, wasm::Trap)
wasm_trap_t* wasm_trap_new(wasm_store_t* store, const wasm_message_t* message) {
auto message_ = borrow(message);
return release(wasm::Trap::make(store, message_.it));
}
void wasm_trap_message(const wasm_trap_t* trap, wasm_message_t* out) {
*out = release(reveal(trap)->message());
}
// Foreign Objects
WASM_DEFINE_REF(foreign, wasm::Foreign)
wasm_foreign_t* wasm_foreign_new(wasm_store_t* store) {
return release(wasm::Foreign::make(store));
}
// Modules
WASM_DEFINE_SHARABLE_REF(module, wasm::Module)
bool wasm_module_validate(wasm_store_t* store, const wasm_byte_vec_t* binary) {
auto binary_ = borrow(binary);
return wasm::Module::validate(store, binary_.it);
}
wasm_module_t* wasm_module_new(wasm_store_t* store,
const wasm_byte_vec_t* binary) {
auto binary_ = borrow(binary);
return release(wasm::Module::make(store, binary_.it));
}
void wasm_module_imports(const wasm_module_t* module,
wasm_importtype_vec_t* out) {
*out = release(reveal(module)->imports());
}
void wasm_module_exports(const wasm_module_t* module,
wasm_exporttype_vec_t* out) {
*out = release(reveal(module)->exports());
}
void wasm_module_serialize(const wasm_module_t* module, wasm_byte_vec_t* out) {
*out = release(reveal(module)->serialize());
}
wasm_module_t* wasm_module_deserialize(wasm_store_t* store,
const wasm_byte_vec_t* binary) {
auto binary_ = borrow(binary);
return release(wasm::Module::deserialize(store, binary_.it));
}
wasm_shared_module_t* wasm_module_share(const wasm_module_t* module) {
return release(reveal(module)->share());
}
wasm_module_t* wasm_module_obtain(wasm_store_t* store,
const wasm_shared_module_t* shared) {
return release(wasm::Module::obtain(store, shared));
}
// Function Instances
WASM_DEFINE_REF(func, wasm::Func)
extern "C++" {
auto wasm_callback(void* env, const wasm::Val args[], wasm::Val results[])
-> wasm::own<wasm::Trap*> {
auto f = reinterpret_cast<wasm_func_callback_t>(env);
return adopt(f(hide(args), hide(results)));
}
struct wasm_callback_env_t {
wasm_func_callback_with_env_t callback;
void* env;
void (*finalizer)(void*);
};
auto wasm_callback_with_env(void* env, const wasm::Val args[],
wasm::Val results[]) -> wasm::own<wasm::Trap*> {
auto t = static_cast<wasm_callback_env_t*>(env);
return adopt(t->callback(t->env, hide(args), hide(results)));
}
void wasm_callback_env_finalizer(void* env) {
auto t = static_cast<wasm_callback_env_t*>(env);
if (t->finalizer) t->finalizer(t->env);
delete t;
}
} // extern "C++"
wasm_func_t* wasm_func_new(wasm_store_t* store, const wasm_functype_t* type,
wasm_func_callback_t callback) {
return release(wasm::Func::make(store, type, wasm_callback,
reinterpret_cast<void*>(callback)));
}
wasm_func_t* wasm_func_new_with_env(wasm_store_t* store,
const wasm_functype_t* type,
wasm_func_callback_with_env_t callback,
void* env, void (*finalizer)(void*)) {
auto env2 = new wasm_callback_env_t{callback, env, finalizer};
return release(wasm::Func::make(store, type, wasm_callback_with_env, env2,
wasm_callback_env_finalizer));
}
wasm_functype_t* wasm_func_type(const wasm_func_t* func) {
return release(func->type());
}
size_t wasm_func_param_arity(const wasm_func_t* func) {
return func->param_arity();
}
size_t wasm_func_result_arity(const wasm_func_t* func) {
return func->result_arity();
}
wasm_trap_t* wasm_func_call(const wasm_func_t* func, const wasm_val_t args[],
wasm_val_t results[]) {
return release(func->call(reveal(args), reveal(results)));
}
// Global Instances
WASM_DEFINE_REF(global, wasm::Global)
wasm_global_t* wasm_global_new(wasm_store_t* store,
const wasm_globaltype_t* type,
const wasm_val_t* val) {
auto val_ = borrow(val);
return release(wasm::Global::make(store, type, val_.it));
}
wasm_globaltype_t* wasm_global_type(const wasm_global_t* global) {
return release(global->type());
}
void wasm_global_get(const wasm_global_t* global, wasm_val_t* out) {
*out = release(global->get());
}
void wasm_global_set(wasm_global_t* global, const wasm_val_t* val) {
auto val_ = borrow(val);
global->set(val_.it);
}
// Table Instances
WASM_DEFINE_REF(table, wasm::Table)
wasm_table_t* wasm_table_new(wasm_store_t* store, const wasm_tabletype_t* type,
wasm_ref_t* ref) {
return release(wasm::Table::make(store, type, ref));
}
wasm_tabletype_t* wasm_table_type(const wasm_table_t* table) {
return release(table->type());
}
wasm_ref_t* wasm_table_get(const wasm_table_t* table, wasm_table_size_t index) {
return release(table->get(index));
}
bool wasm_table_set(wasm_table_t* table, wasm_table_size_t index,
wasm_ref_t* ref) {
return table->set(index, ref);
}
wasm_table_size_t wasm_table_size(const wasm_table_t* table) {
return table->size();
}
bool wasm_table_grow(wasm_table_t* table, wasm_table_size_t delta,
wasm_ref_t* ref) {
return table->grow(delta, ref);
}
// Memory Instances
WASM_DEFINE_REF(memory, wasm::Memory)
wasm_memory_t* wasm_memory_new(wasm_store_t* store,
const wasm_memorytype_t* type) {
return release(wasm::Memory::make(store, type));
}
wasm_memorytype_t* wasm_memory_type(const wasm_memory_t* memory) {
return release(memory->type());
}
wasm_byte_t* wasm_memory_data(wasm_memory_t* memory) { return memory->data(); }
size_t wasm_memory_data_size(const wasm_memory_t* memory) {
return memory->data_size();
}
wasm_memory_pages_t wasm_memory_size(const wasm_memory_t* memory) {
return memory->size();
}
bool wasm_memory_grow(wasm_memory_t* memory, wasm_memory_pages_t delta) {
return memory->grow(delta);
}
// Externals
WASM_DEFINE_REF(extern, wasm::Extern)
WASM_DEFINE_VEC(extern, wasm::Extern, *)
wasm_externkind_t wasm_extern_kind(const wasm_extern_t* external) {
return hide(external->kind());
}
wasm_externtype_t* wasm_extern_type(const wasm_extern_t* external) {
return release(external->type());
}
wasm_extern_t* wasm_func_as_extern(wasm_func_t* func) {
return hide(static_cast<wasm::Extern*>(reveal(func)));
}
wasm_extern_t* wasm_global_as_extern(wasm_global_t* global) {
return hide(static_cast<wasm::Extern*>(reveal(global)));
}
wasm_extern_t* wasm_table_as_extern(wasm_table_t* table) {
return hide(static_cast<wasm::Extern*>(reveal(table)));
}
wasm_extern_t* wasm_memory_as_extern(wasm_memory_t* memory) {
return hide(static_cast<wasm::Extern*>(reveal(memory)));
}
const wasm_extern_t* wasm_func_as_extern_const(const wasm_func_t* func) {
return hide(static_cast<const wasm::Extern*>(reveal(func)));
}
const wasm_extern_t* wasm_global_as_extern_const(const wasm_global_t* global) {
return hide(static_cast<const wasm::Extern*>(reveal(global)));
}
const wasm_extern_t* wasm_table_as_extern_const(const wasm_table_t* table) {
return hide(static_cast<const wasm::Extern*>(reveal(table)));
}
const wasm_extern_t* wasm_memory_as_extern_const(const wasm_memory_t* memory) {
return hide(static_cast<const wasm::Extern*>(reveal(memory)));
}
wasm_func_t* wasm_extern_as_func(wasm_extern_t* external) {
return hide(external->func());
}
wasm_global_t* wasm_extern_as_global(wasm_extern_t* external) {
return hide(external->global());
}
wasm_table_t* wasm_extern_as_table(wasm_extern_t* external) {
return hide(external->table());
}
wasm_memory_t* wasm_extern_as_memory(wasm_extern_t* external) {
return hide(external->memory());
}
const wasm_func_t* wasm_extern_as_func_const(const wasm_extern_t* external) {
return hide(external->func());
}
const wasm_global_t* wasm_extern_as_global_const(
const wasm_extern_t* external) {
return hide(external->global());
}
const wasm_table_t* wasm_extern_as_table_const(const wasm_extern_t* external) {
return hide(external->table());
}
const wasm_memory_t* wasm_extern_as_memory_const(
const wasm_extern_t* external) {
return hide(external->memory());
}
// Module Instances
WASM_DEFINE_REF(instance, wasm::Instance)
wasm_instance_t* wasm_instance_new(wasm_store_t* store,
const wasm_module_t* module,
const wasm_extern_t* const imports[]) {
return release(wasm::Instance::make(
store, module, reinterpret_cast<const wasm::Extern* const*>(imports)));
}
void wasm_instance_exports(const wasm_instance_t* instance,
wasm_extern_vec_t* out) {
*out = release(instance->exports());
}
#undef WASM_DEFINE_OWN
#undef WASM_DEFINE_VEC_BASE
#undef WASM_DEFINE_VEC_PLAIN
#undef WASM_DEFINE_VEC
#undef WASM_DEFINE_TYPE
#undef WASM_DEFINE_REF_BASE
#undef WASM_DEFINE_REF
#undef WASM_DEFINE_SHARABLE_REF
} // extern "C"