Source code
Revision control
Copy as Markdown
Other Tools
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Copyright 2021 Mozilla Foundation
*
* 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
*
*
* 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 "wasm/WasmValue.h"
#include "jsmath.h"
#include "js/friend/ErrorMessages.h" // JSMSG_*
#include "js/Printf.h"
#include "js/Value.h"
#include "vm/BigIntType.h"
#include "vm/GlobalObject.h"
#include "vm/JSContext.h"
#include "vm/JSFunction.h"
#include "vm/JSObject.h"
#include "vm/StringType.h"
#include "wasm/WasmGcObject.h"
#include "wasm/WasmJS.h"
#include "wasm/WasmLog.h"
#include "wasm/WasmTypeDef.h"
#include "vm/JSObject-inl.h"
using namespace js;
using namespace js::wasm;
Val::Val(const LitVal& val) {
type_ = val.type();
switch (type_.kind()) {
case ValType::I32:
cell_.i32_ = val.i32();
return;
case ValType::F32:
cell_.f32_ = val.f32();
return;
case ValType::I64:
cell_.i64_ = val.i64();
return;
case ValType::F64:
cell_.f64_ = val.f64();
return;
case ValType::V128:
cell_.v128_ = val.v128();
return;
case ValType::Ref:
cell_.ref_ = val.ref();
return;
}
MOZ_CRASH();
}
void Val::initFromRootedLocation(ValType type, const void* loc) {
MOZ_ASSERT(!type_.isValid());
type_ = type;
memset(&cell_, 0, sizeof(Cell));
memcpy(&cell_, loc, type_.size());
}
void Val::initFromHeapLocation(ValType type, const void* loc) {
MOZ_ASSERT(!type_.isValid());
type_ = type;
memset(&cell_, 0, sizeof(Cell));
readFromHeapLocation(loc);
}
void Val::writeToRootedLocation(void* loc, bool mustWrite64) const {
memcpy(loc, &cell_, type_.size());
if (mustWrite64 && type_.size() == 4) {
memset((uint8_t*)(loc) + 4, 0, 4);
}
}
void Val::readFromHeapLocation(const void* loc) {
memcpy(&cell_, loc, type_.size());
}
void Val::writeToHeapLocation(void* loc) const {
if (isAnyRef()) {
*((GCPtr<AnyRef>*)loc) = toAnyRef();
return;
}
memcpy(loc, &cell_, type_.size());
}
bool Val::fromJSValue(JSContext* cx, ValType targetType, HandleValue val,
MutableHandleVal rval) {
rval.get().type_ = targetType;
// No pre/post barrier needed as rval is rooted
return ToWebAssemblyValue(cx, val, targetType, &rval.get().cell_,
targetType.size() == 8);
}
bool Val::toJSValue(JSContext* cx, MutableHandleValue rval) const {
return ToJSValue(cx, &cell_, type_, rval);
}
void Val::trace(JSTracer* trc) const {
if (isAnyRef()) {
TraceManuallyBarrieredEdge(trc, &toAnyRef(), "anyref");
}
}
bool wasm::CheckRefType(JSContext* cx, RefType targetType, HandleValue v,
MutableHandleFunction fnval,
MutableHandleAnyRef refval) {
if (!targetType.isNullable() && v.isNull()) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_REF_NONNULLABLE_VALUE);
return false;
}
switch (targetType.kind()) {
case RefType::Func:
return CheckFuncRefValue(cx, v, fnval);
case RefType::Extern:
return AnyRef::fromJSValue(cx, v, refval);
case RefType::Exn:
// Break to the non-exposable case
break;
case RefType::Any:
return CheckAnyRefValue(cx, v, refval);
case RefType::NoFunc:
return CheckNullFuncRefValue(cx, v, fnval);
case RefType::NoExtern:
return CheckNullExternRefValue(cx, v, refval);
case RefType::None:
return CheckNullRefValue(cx, v, refval);
case RefType::Eq:
return CheckEqRefValue(cx, v, refval);
case RefType::I31:
return CheckI31RefValue(cx, v, refval);
case RefType::Struct:
return CheckStructRefValue(cx, v, refval);
case RefType::Array:
return CheckArrayRefValue(cx, v, refval);
case RefType::TypeRef:
return CheckTypeRefValue(cx, targetType.typeDef(), v, refval);
}
MOZ_ASSERT(!ValType(targetType).isExposable());
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_VAL_TYPE);
return false;
}
bool wasm::CheckFuncRefValue(JSContext* cx, HandleValue v,
MutableHandleFunction fun) {
if (v.isNull()) {
MOZ_ASSERT(!fun);
return true;
}
if (v.isObject()) {
JSObject& obj = v.toObject();
if (obj.is<JSFunction>()) {
JSFunction* f = &obj.as<JSFunction>();
if (IsWasmExportedFunction(f)) {
fun.set(f);
return true;
}
}
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_FUNCREF_VALUE);
return false;
}
bool wasm::CheckAnyRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (!AnyRef::fromJSValue(cx, v, vp)) {
MOZ_ASSERT(cx->isThrowingOutOfMemory());
return false;
}
return true;
}
bool wasm::CheckNullFuncRefValue(JSContext* cx, HandleValue v,
MutableHandleFunction fun) {
if (!v.isNull()) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_NULL_FUNCREF_VALUE);
return false;
}
MOZ_ASSERT(!fun);
return true;
}
bool wasm::CheckNullExternRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (!v.isNull()) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_NULL_EXTERNREF_VALUE);
return false;
}
vp.set(AnyRef::null());
return true;
}
bool wasm::CheckNullRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (!v.isNull()) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_NULL_ANYREF_VALUE);
return false;
}
vp.set(AnyRef::null());
return true;
}
bool wasm::CheckEqRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (!AnyRef::fromJSValue(cx, v, vp)) {
MOZ_ASSERT(cx->isThrowingOutOfMemory());
return false;
}
if (vp.isNull() || vp.isI31() ||
(vp.isJSObject() && vp.toJSObject().is<WasmGcObject>())) {
return true;
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_EQREF_VALUE);
return false;
}
bool wasm::CheckI31RefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (!AnyRef::fromJSValue(cx, v, vp)) {
MOZ_ASSERT(cx->isThrowingOutOfMemory());
return false;
}
if (vp.isNull() || vp.isI31()) {
return true;
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_I31REF_VALUE);
return false;
}
bool wasm::CheckStructRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (v.isNull()) {
vp.set(AnyRef::null());
return true;
}
if (v.isObject()) {
JSObject& obj = v.toObject();
if (obj.is<WasmStructObject>()) {
vp.set(AnyRef::fromJSObject(obj.as<WasmStructObject>()));
return true;
}
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_STRUCTREF_VALUE);
return false;
}
bool wasm::CheckArrayRefValue(JSContext* cx, HandleValue v,
MutableHandleAnyRef vp) {
if (v.isNull()) {
vp.set(AnyRef::null());
return true;
}
if (v.isObject()) {
JSObject& obj = v.toObject();
if (obj.is<WasmArrayObject>()) {
vp.set(AnyRef::fromJSObject(obj.as<WasmArrayObject>()));
return true;
}
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_ARRAYREF_VALUE);
return false;
}
bool wasm::CheckTypeRefValue(JSContext* cx, const TypeDef* typeDef,
HandleValue v, MutableHandleAnyRef vp) {
if (v.isNull()) {
vp.set(AnyRef::null());
return true;
}
if (v.isObject()) {
JSObject& obj = v.toObject();
if (obj.is<WasmGcObject>() &&
obj.as<WasmGcObject>().isRuntimeSubtypeOf(typeDef)) {
vp.set(AnyRef::fromJSObject(obj.as<WasmGcObject>()));
return true;
}
if (obj.is<JSFunction>() && obj.as<JSFunction>().isWasm()) {
JSFunction& funcObj = obj.as<JSFunction>();
if (TypeDef::isSubTypeOf(funcObj.wasmTypeDef(), typeDef)) {
vp.set(AnyRef::fromJSObject(funcObj));
return true;
}
}
}
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_TYPEREF_VALUE);
return false;
}
class wasm::NoDebug {
public:
template <typename T>
static void print(T v) {}
};
class wasm::DebugCodegenVal {
template <typename T>
static void print(const char* fmt, T v) {
DebugCodegen(DebugChannel::Function, fmt, v);
}
public:
static void print(int32_t v) { print(" i32(%d)", v); }
static void print(int64_t v) { print(" i64(%" PRId64 ")", v); }
static void print(float v) { print(" f32(%f)", v); }
static void print(double v) { print(" f64(%lf)", v); }
static void print(void* v) { print(" ptr(%p)", v); }
};
template bool wasm::ToJSValue<NoDebug>(JSContext* cx, const void* src,
StorageType type, MutableHandleValue dst,
CoercionLevel level);
template bool wasm::ToJSValue<DebugCodegenVal>(JSContext* cx, const void* src,
StorageType type,
MutableHandleValue dst,
CoercionLevel level);
template bool wasm::ToJSValueMayGC<NoDebug>(StorageType type);
template bool wasm::ToJSValueMayGC<DebugCodegenVal>(StorageType type);
template bool wasm::ToWebAssemblyValue<NoDebug>(JSContext* cx, HandleValue val,
ValType type, void* loc,
bool mustWrite64,
CoercionLevel level);
template bool wasm::ToWebAssemblyValue<DebugCodegenVal>(JSContext* cx,
HandleValue val,
ValType type, void* loc,
bool mustWrite64,
CoercionLevel level);
template bool wasm::ToJSValue<NoDebug>(JSContext* cx, const void* src,
ValType type, MutableHandleValue dst,
CoercionLevel level);
template bool wasm::ToJSValue<DebugCodegenVal>(JSContext* cx, const void* src,
ValType type,
MutableHandleValue dst,
CoercionLevel level);
template bool wasm::ToJSValueMayGC<NoDebug>(ValType type);
template bool wasm::ToJSValueMayGC<DebugCodegenVal>(ValType type);
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_i32(JSContext* cx, HandleValue val, int32_t* loc,
bool mustWrite64) {
bool ok = ToInt32(cx, val, loc);
if (ok && mustWrite64) {
#if defined(JS_CODEGEN_MIPS64)
loc[1] = loc[0] >> 31;
#else
loc[1] = 0;
#endif
}
Debug::print(*loc);
return ok;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_i64(JSContext* cx, HandleValue val, int64_t* loc,
bool mustWrite64) {
MOZ_ASSERT(mustWrite64);
JS_TRY_VAR_OR_RETURN_FALSE(cx, *loc, ToBigInt64(cx, val));
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_f32(JSContext* cx, HandleValue val, float* loc,
bool mustWrite64) {
bool ok = RoundFloat32(cx, val, loc);
if (ok && mustWrite64) {
loc[1] = 0.0;
}
Debug::print(*loc);
return ok;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_f64(JSContext* cx, HandleValue val, double* loc,
bool mustWrite64) {
MOZ_ASSERT(mustWrite64);
bool ok = ToNumber(cx, val, loc);
Debug::print(*loc);
return ok;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_externref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!AnyRef::fromJSValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_nullexternref(JSContext* cx, HandleValue val,
void** loc, bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckNullExternRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_funcref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedFunction fun(cx);
if (!CheckFuncRefValue(cx, val, &fun)) {
return false;
}
loc[0] = fun;
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_nullfuncref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedFunction fun(cx);
if (!CheckNullFuncRefValue(cx, val, &fun)) {
return false;
}
loc[0] = fun;
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_anyref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckAnyRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_nullref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckNullRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_eqref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckEqRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_i31ref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckI31RefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_structref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckStructRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_arrayref(JSContext* cx, HandleValue val, void** loc,
bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckArrayRefValue(cx, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
template <typename Debug = NoDebug>
bool ToWebAssemblyValue_typeref(JSContext* cx, const TypeDef* typeDef,
HandleValue val, void** loc, bool mustWrite64) {
RootedAnyRef result(cx, AnyRef::null());
if (!CheckTypeRefValue(cx, typeDef, val, &result)) {
return false;
}
loc[0] = result.get().forCompiledCode();
#ifndef JS_64BIT
if (mustWrite64) {
loc[1] = nullptr;
}
#endif
Debug::print(*loc);
return true;
}
bool ToWebAssemblyValue_lossless(JSContext* cx, HandleValue val, ValType type,
void* loc, bool mustWrite64) {
if (!val.isObject() || !val.toObject().is<WasmGlobalObject>()) {
return false;
}
Rooted<WasmGlobalObject*> srcVal(cx, &val.toObject().as<WasmGlobalObject>());
if (srcVal->type() != type) {
return false;
}
srcVal->val().get().writeToRootedLocation(loc, mustWrite64);
return true;
}
template <typename Debug>
bool wasm::ToWebAssemblyValue(JSContext* cx, HandleValue val, ValType type,
void* loc, bool mustWrite64,
CoercionLevel level) {
if (level == CoercionLevel::Lossless &&
ToWebAssemblyValue_lossless(cx, val, type.valType(), (void*)loc,
mustWrite64)) {
return true;
}
switch (type.kind()) {
case ValType::I32:
return ToWebAssemblyValue_i32<Debug>(cx, val, (int32_t*)loc, mustWrite64);
case ValType::I64:
return ToWebAssemblyValue_i64<Debug>(cx, val, (int64_t*)loc, mustWrite64);
case ValType::F32:
return ToWebAssemblyValue_f32<Debug>(cx, val, (float*)loc, mustWrite64);
case ValType::F64:
return ToWebAssemblyValue_f64<Debug>(cx, val, (double*)loc, mustWrite64);
case ValType::V128:
break;
case ValType::Ref:
#ifdef ENABLE_WASM_GC
if (!type.isNullable() && val.isNull()) {
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_REF_NONNULLABLE_VALUE);
return false;
}
#else
MOZ_ASSERT(type.isNullable());
#endif
switch (type.refTypeKind()) {
case RefType::Func:
return ToWebAssemblyValue_funcref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::Extern:
return ToWebAssemblyValue_externref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::Exn:
// Break to the non-exposable case
break;
case RefType::Any:
return ToWebAssemblyValue_anyref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::NoFunc:
return ToWebAssemblyValue_nullfuncref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::NoExtern:
return ToWebAssemblyValue_nullexternref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::None:
return ToWebAssemblyValue_nullref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::Eq:
return ToWebAssemblyValue_eqref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::I31:
return ToWebAssemblyValue_i31ref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::Struct:
return ToWebAssemblyValue_structref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::Array:
return ToWebAssemblyValue_arrayref<Debug>(cx, val, (void**)loc,
mustWrite64);
case RefType::TypeRef:
return ToWebAssemblyValue_typeref<Debug>(cx, type.typeDef(), val,
(void**)loc, mustWrite64);
}
}
MOZ_ASSERT(!type.isExposable());
JS_ReportErrorNumberUTF8(cx, GetErrorMessage, nullptr,
JSMSG_WASM_BAD_VAL_TYPE);
return false;
}
template <typename Debug = NoDebug>
bool ToJSValue_i8(JSContext* cx, int8_t src, MutableHandleValue dst) {
dst.set(Int32Value(src));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_i16(JSContext* cx, int16_t src, MutableHandleValue dst) {
dst.set(Int32Value(src));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_i32(JSContext* cx, int32_t src, MutableHandleValue dst) {
dst.set(Int32Value(src));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_i64(JSContext* cx, int64_t src, MutableHandleValue dst) {
// If bi is manipulated other than test & storing, it would need
// to be rooted here.
BigInt* bi = BigInt::createFromInt64(cx, src);
if (!bi) {
return false;
}
dst.set(BigIntValue(bi));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_f32(JSContext* cx, float src, MutableHandleValue dst) {
dst.set(JS::CanonicalizedDoubleValue(src));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_f64(JSContext* cx, double src, MutableHandleValue dst) {
dst.set(JS::CanonicalizedDoubleValue(src));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_funcref(JSContext* cx, void* src, MutableHandleValue dst) {
dst.set(UnboxFuncRef(FuncRef::fromCompiledCode(src)));
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_externref(JSContext* cx, void* src, MutableHandleValue dst) {
dst.set(AnyRef::fromCompiledCode(src).toJSValue());
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_anyref(JSContext* cx, void* src, MutableHandleValue dst) {
dst.set(AnyRef::fromCompiledCode(src).toJSValue());
Debug::print(src);
return true;
}
template <typename Debug = NoDebug>
bool ToJSValue_lossless(JSContext* cx, const void* src, MutableHandleValue dst,
ValType type) {
RootedVal srcVal(cx);
srcVal.get().initFromRootedLocation(type, src);
RootedObject prototype(
cx, GlobalObject::getOrCreatePrototype(cx, JSProto_WasmGlobal));
Rooted<WasmGlobalObject*> srcGlobal(
cx, WasmGlobalObject::create(cx, srcVal, false, prototype));
if (!srcGlobal) {
return false;
}
dst.set(ObjectValue(*srcGlobal.get()));
return true;
}
template <typename Debug>
bool wasm::ToJSValue(JSContext* cx, const void* src, StorageType type,
MutableHandleValue dst, CoercionLevel level) {
if (level == CoercionLevel::Lossless) {
MOZ_ASSERT(type.isValType());
return ToJSValue_lossless(cx, src, dst, type.valType());
}
switch (type.kind()) {
case StorageType::I8:
return ToJSValue_i8<Debug>(cx, *reinterpret_cast<const int8_t*>(src),
dst);
case StorageType::I16:
return ToJSValue_i16<Debug>(cx, *reinterpret_cast<const int16_t*>(src),
dst);
case StorageType::I32:
return ToJSValue_i32<Debug>(cx, *reinterpret_cast<const int32_t*>(src),
dst);
case StorageType::I64:
return ToJSValue_i64<Debug>(cx, *reinterpret_cast<const int64_t*>(src),
dst);
case StorageType::F32:
return ToJSValue_f32<Debug>(cx, *reinterpret_cast<const float*>(src),
dst);
case StorageType::F64:
return ToJSValue_f64<Debug>(cx, *reinterpret_cast<const double*>(src),
dst);
case StorageType::V128:
break;
case StorageType::Ref:
switch (type.refType().hierarchy()) {
case RefTypeHierarchy::Func:
return ToJSValue_funcref<Debug>(
cx, *reinterpret_cast<void* const*>(src), dst);
case RefTypeHierarchy::Exn:
// Break to the non-exposable case
break;
case RefTypeHierarchy::Extern:
return ToJSValue_externref<Debug>(
cx, *reinterpret_cast<void* const*>(src), dst);
case RefTypeHierarchy::Any:
return ToJSValue_anyref<Debug>(
cx, *reinterpret_cast<void* const*>(src), dst);
break;
}
}
MOZ_ASSERT(!type.isExposable());
Debug::print(nullptr);
dst.setUndefined();
return true;
}
template <typename Debug>
bool wasm::ToJSValueMayGC(StorageType type) {
return type.kind() == StorageType::I64;
}
template <typename Debug>
bool wasm::ToJSValue(JSContext* cx, const void* src, ValType type,
MutableHandleValue dst, CoercionLevel level) {
return wasm::ToJSValue(cx, src, StorageType(type.packed()), dst, level);
}
template <typename Debug>
bool wasm::ToJSValueMayGC(ValType type) {
return wasm::ToJSValueMayGC(StorageType(type.packed()));
}
/* static */
wasm::FuncRef wasm::FuncRef::fromAnyRefUnchecked(AnyRef p) {
if (p.isNull()) {
return FuncRef::null();
}
MOZ_ASSERT(p.isJSObject() && p.toJSObject().is<JSFunction>());
return FuncRef(&p.toJSObject().as<JSFunction>());
}
void wasm::FuncRef::trace(JSTracer* trc) const {
if (value_) {
TraceManuallyBarrieredEdge(trc, &value_, "wasm funcref referent");
}
}
Value wasm::UnboxFuncRef(FuncRef val) {
JSFunction* fn = val.asJSFunction();
Value result;
MOZ_ASSERT_IF(fn, fn->is<JSFunction>());
result.setObjectOrNull(fn);
return result;
}