lib: handle Float16Array in node:v8 serdes

PR-URL: #55996Fixes: #55574 Reviewed-By: Ben Noordhuis <[email protected]> Reviewed-By: Antoine du Hamel <[email protected]> Reviewed-By: LiviaMedeiros <[email protected]>

Author: bartlomieju

lib/eslint.config_partial.mjs

@@ -347,6 +347,11 @@ export default [
 name: 'SubtleCrypto',
 message: "Use `const{SubtleCrypto } = require('internal/crypto/webcrypto');` instead of the global.",
 },
+// Float16Array is not available in primordials because it's only available with --js-float16array CLI flag.
+{
+name: 'Float16Array',
+message: 'Use `const{Float16Array } = globalThis;` instead of the global.',
+},
 ],
 'no-restricted-modules': [
 'error',

lib/v8.js

@@ -31,6 +31,9 @@ const{
  Uint32Array,
  Uint8Array,
  Uint8ClampedArray,
+globalThis: {
+ Float16Array,
+},
 }=primordials;
 
 const{ Buffer }=require('buffer');
@@ -63,6 +66,7 @@ const{
 }=require('internal/heap_utils');
 constpromiseHooks=require('internal/promise_hooks');
 const{ getOptionValue }=require('internal/options');
+
 /**
  * Generates a snapshot of the current V8 heap
  * and writes it to a JSON file.
@@ -289,6 +293,7 @@ function arrayBufferViewTypeToIndex(abView){
 // Index 10 is FastBuffer.
 if(type==='[object BigInt64Array]')return11;
 if(type==='[object BigUint64Array]')return12;
+if(type==='[object Float16Array]')return13;
 return-1;
 }
 
@@ -306,6 +311,7 @@ function arrayBufferViewIndexToType(index){
 if(index===10)returnFastBuffer;
 if(index===11)returnBigInt64Array;
 if(index===12)returnBigUint64Array;
+if(index===13)returnFloat16Array;
 returnundefined;
 }
 

test/parallel/test-v8-serdes.js

@@ -1,4 +1,4 @@
-// Flags: --expose-internals
+// Flags: --expose-internals --js-float16array
 
 'use strict';
 
@@ -7,6 +7,9 @@ const{internalBinding } = require('internal/test/binding');
 constassert=require('assert');
 constv8=require('v8');
 constos=require('os');
+// TODO(bartlomieju): once `Float16Array` is available in stable V8,
+// remove this line and `--js-float16array` flag up top
+const{ Float16Array }=globalThis;
 
 constcircular={};
 circular.circular=circular;
@@ -26,6 +29,7 @@ const objects = [
 Buffer.from([1,2,3,4]),
 newBigInt64Array([42n]),
 newBigUint64Array([42n]),
+newFloat16Array([1,2,3,4]),
 undefined,
 null,
 42,