Don't pretend we support SharedArrayBuffer.

components/script/dom/bindings/interface.rs

@@ -137,7 +137,7 @@ pub unsafe fn create_global_object(
 
     let mut options = RealmOptions::default();
     options.creationOptions_.traceGlobal_ = Some(trace);
-    options.creationOptions_.sharedMemoryAndAtomics_ = true;
+    options.creationOptions_.sharedMemoryAndAtomics_ = false;
     options.creationOptions_.streams_ = true;
 
     rval.set(JS_NewGlobalObject(

components/script/script_runtime.rs

@@ -45,7 +45,6 @@ use js::jsapi::ContextOptionsRef;
 use js::jsapi::GetPromiseUserInputEventHandlingState;
 use js::jsapi::InitConsumeStreamCallback;
 use js::jsapi::InitDispatchToEventLoop;
-use js::jsapi::JS_SetFutexCanWait;
 use js::jsapi::MimeType;
 use js::jsapi::PromiseUserInputEventHandlingState;
 use js::jsapi::StreamConsumer as JSStreamConsumer;
@@ -451,14 +450,6 @@ unsafe fn new_rt_and_cx_with_parent(
     let (cx, runtime) = if let Some(parent) = parent {
         let runtime = RustRuntime::create_with_parent(parent);
         let cx = runtime.cx();
-
-        // Note: this enables blocking on an Atomics.wait,
-        // which should only be enabled for an agent whose [[CanBlock]] is true.
-        // Currently only a dedicated worker agent uses a parent,
-        // and this agent can block.
-        // See https://html.spec.whatwg.org/multipage/#integration-with-the-javascript-agent-cluster-formalism
-        JS_SetFutexCanWait(cx);
-
         (cx, runtime)
     } else {
         let runtime = RustRuntime::new(JS_ENGINE.lock().unwrap().as_ref().unwrap().clone());

tests/wpt/include.ini

@@ -91,6 +91,12 @@ skip: true
     skip: true
   [cross-origin-opener-policy]
     skip: true
+  [infrastructure]
+    skip: false
+    [safe-passing-of-structured-data]
+      skip: false
+      [shared-array-buffers]
+        skip: true
   [semantics]
     skip: false
     [document-metadata]

tests/wpt/metadata/encoding/encodeInto.any.js.ini

@@ -1,4 +1,5 @@
 [encodeInto.any.html]
+  expected: ERROR
   [encodeInto() with 𝌆A and destination length 3, offset 4, filler 128]
     expected: FAIL
 
@@ -565,6 +566,7 @@
 
 
 [encodeInto.any.worker.html]
+  expected: ERROR
   [encodeInto() with 𝌆A and destination length 3, offset 4, filler 128]
     expected: FAIL
 

tests/wpt/metadata/encoding/streams/decode-utf8.any.js.ini

@@ -11,6 +11,7 @@
 
 
 [decode-utf8.any.html]
+  expected: ERROR
   [decoding one UTF-8 chunk should give one output string]
     expected: FAIL
 
@@ -55,6 +56,7 @@
 
 
 [decode-utf8.any.worker.html]
+  expected: ERROR
   [decoding one UTF-8 chunk should give one output string]
     expected: FAIL
 

tests/wpt/metadata/encoding/textdecoder-copy.any.js.ini

@@ -1,9 +1,11 @@
 [textdecoder-copy.any.html]
+  expected: ERROR
   [Modify buffer after passing it in (SharedArrayBuffer)]
     expected: FAIL
 
 
 [textdecoder-copy.any.worker.html]
+  expected: ERROR
   [Modify buffer after passing it in (SharedArrayBuffer)]
     expected: FAIL
 

tests/wpt/metadata/encoding/textdecoder-streaming.any.js.ini

@@ -1,8 +1,8 @@
 [textdecoder-streaming.any.worker.html]
-  expected: CRASH
+  expected: ERROR
 
 [textdecoder-streaming.any.html]
-  expected: CRASH
+  expected: ERROR
 
 [textdecoder-streaming.any.sharedworker.html]
   expected: ERROR

tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/requires-failure.https.any.js.ini

@@ -1,4 +1,6 @@
 [requires-failure.https.any.html]
+  [[[CanBlock\]\] in a Window]
+    expected: FAIL
 
 [requires-failure.https.any.serviceworker.html]
   expected: ERROR

tests/wpt/metadata/html/webappapis/scripting/processing-model-2/integration-with-the-javascript-agent-formalism/requires-success.any.js.ini

@@ -1,3 +1,7 @@
+[requires-success.any.worker.html]
+  [[[CanBlock\]\] in a DedicatedWorkerGlobalScope]
+    expected: FAIL
+
 [requires-success.any.sharedworker.html]
   expected: ERROR
   [requires-success]

tests/wpt/metadata/wasm/jsapi/memory/constructor-shared.tentative.any.js.ini

@@ -1,9 +1,12 @@
 [constructor-shared.tentative.any.worker.html]
   [Shared memory]
     expected: FAIL
+  [Order of evaluation for descriptor (with shared)]
+    expected: FAIL
 
 
 [constructor-shared.tentative.any.html]
   [Shared memory]
     expected: FAIL
-
+  [Order of evaluation for descriptor (with shared)]
+    expected: FAIL

tests/wpt/metadata/webaudio/the-audio-api/the-audiobuffer-interface/audiobuffer-copy-channel.html.ini

@@ -26,3 +26,8 @@
   [X 5: buffer.copyFromChannel(x, 0, -1) incorrectly threw IndexSizeError: "The index is not in the allowed range.".]
     expected: FAIL
 
+  [Executing "copyFrom-exceptions"]
+    expected: FAIL
+
+  [Executing "copyTo-exceptions"]
+    expected: FAIL

tests/wpt/metadata/xhr/send-data-sharedarraybuffer.any.js.ini

@@ -1,5 +1,47 @@
 [send-data-sharedarraybuffer.any.html]
-  expected: CRASH
+  [sending a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int8Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint8Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint8ClampedArray backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int16Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint16Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Float32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Float64Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a DataView backed by a SharedArrayBuffer]
+    expected: FAIL
 
 [send-data-sharedarraybuffer.any.worker.html]
-  expected: CRASH
+  [sending a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int8Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint8Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint8ClampedArray backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int16Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint16Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Int32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Uint32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Float32Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a Float64Array backed by a SharedArrayBuffer]
+    expected: FAIL
+  [sending a DataView backed by a SharedArrayBuffer]
+    expected: FAIL

tests/wpt/mozilla/meta/MANIFEST.json

@@ -11005,7 +11005,7 @@
      []
     ],
     "interfaces.js": [
-     "253dd124cebe9b7d3aa4fc5ff8c9137e7aeb2f66",
+     "7a105e791dd80bd42d80055a64746bbe5fece41e",
      []
     ],
     "nested_asap_script.js": [

tests/wpt/mozilla/tests/mozilla/interfaces.js

@@ -5,7 +5,6 @@ function test_interfaces(interfaceNamesInGlobalScope) {
     var ecmaGlobals = [
       "Array",
       "ArrayBuffer",
-      "Atomics",
       "BigInt",
       "BigInt64Array",
       "BigUint64Array",
@@ -43,7 +42,6 @@ function test_interfaces(interfaceNamesInGlobalScope) {
       "Reflect",
       "RegExp",
       "Set",
-      "SharedArrayBuffer",
       "String",
       "Symbol",
       "SyntaxError",