src: add internal isArrayBufferDetached

PR-URL: #45568 Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: LiviaMedeiros <livia@cirno.name>
nodejs · Dec 13, 2022 · 349b4f8 · 349b4f8
1 parent 2fbe2f9
commit 349b4f8
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Showing 4 changed files with 28 additions and 19 deletions.
diff --git a/lib/internal/util.js b/lib/internal/util.js
@@ -1,6 +1,7 @@
 'use strict';
 
 const {
+  ArrayBufferPrototypeGetByteLength,
   ArrayFrom,
   ArrayIsArray,
   ArrayPrototypePush,
@@ -42,6 +43,7 @@ const {
 } = require('internal/errors');
 const { signals } = internalBinding('constants').os;
 const {
+  isArrayBufferDetached: _isArrayBufferDetached,
   privateSymbols: {
     arrow_message_private_symbol,
     decorated_private_symbol,
@@ -644,6 +646,14 @@ function SideEffectFreeRegExpPrototypeExec(regex, string) {
   return FunctionPrototypeCall(RegExpFromAnotherRealm.prototype.exec, regex, string);
 }
 
+function isArrayBufferDetached(value) {
+  if (ArrayBufferPrototypeGetByteLength(value) === 0) {
+    return _isArrayBufferDetached(value);
+  }
+
+  return false;
+}
+
 module.exports = {
   assertCrypto,
   cachedResult,
@@ -664,6 +674,7 @@ module.exports = {
   getInternalGlobal,
   getSystemErrorMap,
   getSystemErrorName,
+  isArrayBufferDetached,
   isError,
   isInsideNodeModules,
   join,

diff --git a/lib/internal/webstreams/readablestream.js b/lib/internal/webstreams/readablestream.js
@@ -51,6 +51,7 @@ const {
 const {
   createDeferredPromise,
   customInspectSymbol: kInspect,
+  isArrayBufferDetached,
   kEmptyObject,
   kEnumerableProperty,
 } = require('internal/util');
@@ -103,7 +104,6 @@ const {
   extractHighWaterMark,
   extractSizeAlgorithm,
   lazyTransfer,
-  isDetachedBuffer,
   isViewedArrayBufferDetached,
   isBrandCheck,
   resetQueue,
@@ -668,7 +668,7 @@ class ReadableStreamBYOBRequest {
     const viewBuffer = ArrayBufferViewGetBuffer(view);
     const viewBufferByteLength = ArrayBufferPrototypeGetByteLength(viewBuffer);
 
-    if (isDetachedBuffer(viewBuffer)) {
+    if (isArrayBufferDetached(viewBuffer)) {
       throw new ERR_INVALID_STATE.TypeError('Viewed ArrayBuffer is detached');
     }
 
@@ -2641,7 +2641,7 @@ function readableByteStreamControllerEnqueue(controller, chunk) {
   if (pendingPullIntos.length) {
     const firstPendingPullInto = pendingPullIntos[0];
 
-    if (isDetachedBuffer(firstPendingPullInto.buffer)) {
+    if (isArrayBufferDetached(firstPendingPullInto.buffer)) {
       throw new ERR_INVALID_STATE.TypeError(
         'Destination ArrayBuffer is detached',
       );

diff --git a/lib/internal/webstreams/util.js b/lib/internal/webstreams/util.js
@@ -1,7 +1,6 @@
 'use strict';
 
 const {
-  ArrayBufferPrototypeGetByteLength,
   ArrayBufferPrototypeSlice,
   ArrayPrototypePush,
   ArrayPrototypeShift,
@@ -47,6 +46,7 @@ const {
 } = internalBinding('util');
 
 const assert = require('internal/assert');
+const { isArrayBufferDetached } = require('internal/util');
 
 const kState = Symbol('kState');
 const kType = Symbol('kType');
@@ -137,23 +137,10 @@ function transferArrayBuffer(buffer) {
   return res;
 }
 
-function isDetachedBuffer(buffer) {
-  if (ArrayBufferPrototypeGetByteLength(buffer) === 0) {
-    // TODO(daeyeon): Consider using C++ builtin to improve performance.
-    try {
-      new Uint8Array(buffer);
-    } catch (error) {
-      assert(error.name === 'TypeError');
-      return true;
-    }
-  }
-  return false;
-}
-
 function isViewedArrayBufferDetached(view) {
   return (
     ArrayBufferViewGetByteLength(view) === 0 &&
-    isDetachedBuffer(ArrayBufferViewGetBuffer(view))
+    isArrayBufferDetached(ArrayBufferViewGetBuffer(view))
   );
 }
 
@@ -253,7 +240,6 @@ module.exports = {
   extractSizeAlgorithm,
   lazyTransfer,
   isBrandCheck,
-  isDetachedBuffer,
   isPromisePending,
   isViewedArrayBufferDetached,
   peekQueueValue,

diff --git a/src/node_util.cc b/src/node_util.cc
@@ -137,6 +137,15 @@ static void GetProxyDetails(const FunctionCallbackInfo<Value>& args) {
   }
 }
 
+static void IsArrayBufferDetached(const FunctionCallbackInfo<Value>& args) {
+  if (args[0]->IsArrayBuffer()) {
+    auto buffer = args[0].As<v8::ArrayBuffer>();
+    args.GetReturnValue().Set(buffer->WasDetached());
+    return;
+  }
+  args.GetReturnValue().Set(false);
+}
+
 static void PreviewEntries(const FunctionCallbackInfo<Value>& args) {
   if (!args[0]->IsObject())
     return;
@@ -349,6 +358,7 @@ static void ToUSVString(const FunctionCallbackInfo<Value>& args) {
 void RegisterExternalReferences(ExternalReferenceRegistry* registry) {
   registry->Register(GetPromiseDetails);
   registry->Register(GetProxyDetails);
+  registry->Register(IsArrayBufferDetached);
   registry->Register(PreviewEntries);
   registry->Register(GetOwnNonIndexProperties);
   registry->Register(GetConstructorName);
@@ -422,6 +432,8 @@ void Initialize(Local<Object> target,
   SetMethodNoSideEffect(
       context, target, "getPromiseDetails", GetPromiseDetails);
   SetMethodNoSideEffect(context, target, "getProxyDetails", GetProxyDetails);
+  SetMethodNoSideEffect(
+      context, target, "isArrayBufferDetached", IsArrayBufferDetached);
   SetMethodNoSideEffect(context, target, "previewEntries", PreviewEntries);
   SetMethodNoSideEffect(
       context, target, "getOwnNonIndexProperties", GetOwnNonIndexProperties);