lib: add primordials.SafeArrayIterator

PR-URL: #36532 Reviewed-By: Rich Trott <[email protected]>
nodejs · Jan 12, 2021 · 181bad5 · 181bad5
1 parent a4d64f9
commit 181bad5
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Showing 7 changed files with 33 additions and 9 deletions.
diff --git a/lib/internal/event_target.js b/lib/internal/event_target.js
@@ -13,6 +13,7 @@ const {
   ObjectGetOwnPropertyDescriptor,
   ObjectGetOwnPropertyDescriptors,
   ReflectApply,
+  SafeArrayIterator,
   SafeMap,
   String,
   Symbol,
@@ -653,6 +654,7 @@ function defineEventHandler(emitter, name) {
 const EventEmitterMixin = (Superclass) => {
   class MixedEventEmitter extends Superclass {
     constructor(...args) {
+      args = new SafeArrayIterator(args);
       super(...args);
       FunctionPrototypeCall(EventEmitter, this);
     }

diff --git a/lib/internal/modules/cjs/loader.js b/lib/internal/modules/cjs/loader.js
@@ -462,7 +462,7 @@ function trySelf(parentPath, request) {
 const EXPORTS_PATTERN = /^((?:@[^/\\%]+\/)?[^./\\%][^/\\%]*)(\/.*)?$/;
 function resolveExports(nmPath, request) {
   // The implementation's behavior is meant to mirror resolution in ESM.
-  const [, name, expansion = ''] =
+  const { 1: name, 2: expansion = '' } =
     StringPrototypeMatch(request, EXPORTS_PATTERN) || [];
   if (!name)
     return;

diff --git a/lib/internal/modules/esm/module_job.js b/lib/internal/modules/esm/module_job.js
@@ -10,6 +10,7 @@ const {
   PromiseResolve,
   PromisePrototypeCatch,
   ReflectApply,
+  SafeArrayIterator,
   SafeSet,
   StringPrototypeIncludes,
   StringPrototypeMatch,
@@ -60,9 +61,9 @@ class ModuleJob {
       });
 
       if (promises !== undefined)
-        await PromiseAll(promises);
+        await PromiseAll(new SafeArrayIterator(promises));
 
-      return PromiseAll(dependencyJobs);
+      return PromiseAll(new SafeArrayIterator(dependencyJobs));
     };
     // Promise for the list of all dependencyJobs.
     this.linked = link();
@@ -90,8 +91,8 @@ class ModuleJob {
       }
       jobsInGraph.add(moduleJob);
       const dependencyJobs = await moduleJob.linked;
-      return PromiseAll(
-        ArrayPrototypeMap(dependencyJobs, addJobsToDependencyGraph));
+      return PromiseAll(new SafeArrayIterator(
+        ArrayPrototypeMap(dependencyJobs, addJobsToDependencyGraph)));
     };
     await addJobsToDependencyGraph(this);
 

diff --git a/lib/internal/per_context/primordials.js b/lib/internal/per_context/primordials.js
@@ -242,6 +242,9 @@ primordials.SafeWeakSet = makeSafe(
 // Refs: https://tc39.es/ecma262/#sec-%typedarray%-intrinsic-object
 [
   { name: 'TypedArray', original: Reflect.getPrototypeOf(Uint8Array) },
+  { name: 'ArrayIterator', original: {
+    prototype: Reflect.getPrototypeOf(Array.prototype[Symbol.iterator]()),
+  } },
   { name: 'StringIterator', original: {
     prototype: Reflect.getPrototypeOf(String.prototype[Symbol.iterator]()),
   } },
@@ -253,6 +256,10 @@ primordials.SafeWeakSet = makeSafe(
   copyPrototype(original.prototype, primordials, `${name}Prototype`);
 });
 
+primordials.SafeArrayIterator = createSafeIterator(
+  primordials.ArrayPrototypeSymbolIterator,
+  primordials.ArrayIteratorPrototypeNext
+);
 primordials.SafeStringIterator = createSafeIterator(
   primordials.StringPrototypeSymbolIterator,
   primordials.StringIteratorPrototypeNext

diff --git a/lib/internal/url.js b/lib/internal/url.js
@@ -446,8 +446,8 @@ ObjectDefineProperties(URL.prototype, {
         if (ctx.host === null && ctx.path.length > 1 && ctx.path[0] === '') {
           ret += '/.';
         }
-        for (const segment of ctx.path) {
-          ret += '/' + segment;
+        if (ctx.path.length) {
+          ret += '/' + ArrayPrototypeJoin(ctx.path, '/');
         }
       }
       if (options.search && ctx.query !== null)

diff --git a/lib/internal/util/debuglog.js b/lib/internal/util/debuglog.js
@@ -6,6 +6,7 @@ const {
   ObjectDefineProperty,
   RegExp,
   RegExpPrototypeTest,
+  SafeArrayIterator,
   StringPrototypeToUpperCase
 } = primordials;
 
@@ -78,15 +79,15 @@ function debuglog(set, cb) {
     debug = debuglogImpl(enabled, set);
     if (typeof cb === 'function')
       cb(debug);
-    debug(...args);
+    debug(...new SafeArrayIterator(args));
   };
   let enabled;
   let test = () => {
     init();
     test = () => enabled;
     return enabled;
   };
-  const logger = (...args) => debug(...args);
+  const logger = (...args) => debug(...new SafeArrayIterator(args));
   ObjectDefineProperty(logger, 'enabled', {
     get() {
       return test();

diff --git a/test/parallel/test-require-delete-array-iterator.js b/test/parallel/test-require-delete-array-iterator.js
@@ -0,0 +1,13 @@
+'use strict';
+
+const common = require('../common');
+
+
+const ArrayIteratorPrototype =
+    Object.getPrototypeOf(Array.prototype[Symbol.iterator]());
+
+delete Array.prototype[Symbol.iterator];
+delete ArrayIteratorPrototype.next;
+
+require('../common/fixtures');
+import('../fixtures/es-modules/test-esm-ok.mjs').then(common.mustCall());