Require --enable-shared-everything with WaitQueues (#8342)

Validate that shared-everything is enabled when a WaitQueue is seen
during TypeBuilder::build.

Part of #8315.

Author: stevenfontanella

src/wasm-type.h

@@ -907,6 +907,8 @@ struct TypeBuilder {
     InvalidFuncType,
     // A shared type with shared-everything disabled.
     InvalidSharedType,
+    // WaitQueue was used with shared-everything disabled.
+    InvalidWaitQueue,
     // A string type with strings disabled.
     InvalidStringType,
     // A non-shared field of a shared heap type.

src/wasm/wasm-type.cpp

@@ -1447,6 +1447,8 @@ std::ostream& operator<<(std::ostream& os, TypeBuilder::ErrorReason reason) {
       return os << "Continuation has invalid function type";
     case TypeBuilder::ErrorReason::InvalidSharedType:
       return os << "Shared types require shared-everything";
+    case TypeBuilder::ErrorReason::InvalidWaitQueue:
+      return os << "Waitqueues require shared-everything";
     case TypeBuilder::ErrorReason::InvalidStringType:
       return os << "String types require strings feature";
     case TypeBuilder::ErrorReason::InvalidUnsharedField:
@@ -2455,6 +2457,10 @@ validateStruct(const Struct& struct_, FeatureSet feats, bool isShared) {
     if (auto err = validateType(field.type, feats, isShared)) {
       return err;
     }
+    if (field.packedType == Field::PackedType::WaitQueue &&
+        !feats.hasSharedEverything()) {
+      return TypeBuilder::ErrorReason::InvalidWaitQueue;
+    }
   }
   return std::nullopt;
 }

test/lit/validation/waitqueue.wast

@@ -0,0 +1,9 @@
+;; RUN: not wasm-opt --enable-reference-types --enable-gc %s 2>&1 | filecheck %s
+
+(module
+  ;; CHECK:      invalid type: Waitqueues require shared-everything
+  (type $t (struct (field waitqueue)))
+
+  ;; use $t so wasm-opt doesn't drop the definition
+  (global (ref null $t) (ref.null $t))
+)