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src: add internal binding for constructing SharedArrayBuffers · nodejs/node@fdff838

@@ -10,6 +10,7 @@ namespace util {

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using v8::ALL_PROPERTIES;

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using v8::Array;

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using v8::ArrayBuffer;

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using v8::ArrayBufferView;

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using v8::BigInt;

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using v8::Boolean;

@@ -34,6 +35,7 @@ using v8::ONLY_WRITABLE;

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using v8::Promise;

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using v8::PropertyFilter;

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using v8::Proxy;

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using v8::SharedArrayBuffer;

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using v8::SKIP_STRINGS;

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using v8::SKIP_SYMBOLS;

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using v8::StackFrame;

@@ -438,6 +440,30 @@ static void DefineLazyProperties(const FunctionCallbackInfo<Value>& args) {

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}

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}

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void ConstructSharedArrayBuffer(const FunctionCallbackInfo<Value>& args) {

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Environment* env = Environment::GetCurrent(args);

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int64_t length;

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// Note: IntegerValue() clamps its output, so excessively large input values

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// will not overflow

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if (!args[0]->IntegerValue(env->context()).To(&length)) {

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return;

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}

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if (length < 0 ||

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static_cast<uint64_t>(length) > ArrayBuffer::kMaxByteLength) {

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env->ThrowRangeError("Invalid array buffer length");

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return;

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}

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Local<SharedArrayBuffer> sab;

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if (!SharedArrayBuffer::MaybeNew(env->isolate(), static_cast<size_t>(length))

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.ToLocal(&sab)) {

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// Note: SharedArrayBuffer::MaybeNew doesn't schedule an exception if it

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// fails

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env->ThrowRangeError("Array buffer allocation failed");

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return;

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}

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args.GetReturnValue().Set(sab);

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}

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void RegisterExternalReferences(ExternalReferenceRegistry* registry) {

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registry->Register(GetPromiseDetails);

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registry->Register(GetProxyDetails);

@@ -455,6 +481,7 @@ void RegisterExternalReferences(ExternalReferenceRegistry* registry) {

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registry->Register(IsInsideNodeModules);

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registry->Register(DefineLazyProperties);

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registry->Register(DefineLazyPropertiesGetter);

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registry->Register(ConstructSharedArrayBuffer);

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}

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void Initialize(Local<Object> target,

@@ -554,9 +581,12 @@ void Initialize(Local<Object> target,

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SetMethodNoSideEffect(context, target, "getCallSites", GetCallSites);

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SetMethod(context, target, "sleep", Sleep);

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SetMethod(context, target, "parseEnv", ParseEnv);

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SetMethod(

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context, target, "arrayBufferViewHasBuffer", ArrayBufferViewHasBuffer);

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SetMethod(context,

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target,

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"constructSharedArrayBuffer",

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ConstructSharedArrayBuffer);

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Local<String> should_abort_on_uncaught_toggle =

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FIXED_ONE_BYTE_STRING(env->isolate(), "shouldAbortOnUncaughtToggle");