4 files changed, 22 insertions, 20 deletions
diff --git a/js/src/builtin/Promise.cpp b/js/src/builtin/Promise.cpp
index 346b2ebc2..4210b9cd2 100644
--- a/js/src/builtin/Promise.cpp
+++ b/js/src/builtin/Promise.cpp
@@ -2631,14 +2631,14 @@ PromiseObject::dependentPromises(JSContext* cx, MutableHandle<GCVector<Value>> v
     return true;
 }
 
-bool
-PromiseObject::resolve(JSContext* cx, HandleValue resolutionValue)
+/* static */ bool
+PromiseObject::resolve(JSContext* cx, Handle<PromiseObject*> promise, HandleValue resolutionValue)
 {
-    MOZ_ASSERT(!PromiseHasAnyFlag(*this, PROMISE_FLAG_ASYNC));
-    if (state() != JS::PromiseState::Pending)
+    MOZ_ASSERT(!PromiseHasAnyFlag(*promise, PROMISE_FLAG_ASYNC));
+    if (promise->state() != JS::PromiseState::Pending)
         return true;
 
-    RootedObject resolveFun(cx, GetResolveFunctionFromPromise(this));
+    RootedObject resolveFun(cx, GetResolveFunctionFromPromise(promise));
     RootedValue funVal(cx, ObjectValue(*resolveFun));
 
     // For xray'd Promises, the resolve fun may have been created in another
@@ -2654,14 +2654,14 @@ PromiseObject::resolve(JSContext* cx, HandleValue resolutionValue)
     return Call(cx, funVal, UndefinedHandleValue, args, &dummy);
 }
 
-bool
-PromiseObject::reject(JSContext* cx, HandleValue rejectionValue)
+/* static */ bool
+PromiseObject::reject(JSContext* cx, Handle<PromiseObject*> promise, HandleValue rejectionValue)
 {
-    MOZ_ASSERT(!PromiseHasAnyFlag(*this, PROMISE_FLAG_ASYNC));
-    if (state() != JS::PromiseState::Pending)
+    MOZ_ASSERT(!PromiseHasAnyFlag(*promise, PROMISE_FLAG_ASYNC));
+    if (promise->state() != JS::PromiseState::Pending)
         return true;
 
-    RootedValue funVal(cx, this->getFixedSlot(PromiseSlot_RejectFunction));
+    RootedValue funVal(cx, promise->getFixedSlot(PromiseSlot_RejectFunction));
     MOZ_ASSERT(IsCallable(funVal));
 
     FixedInvokeArgs<1> args(cx);
diff --git a/js/src/builtin/Promise.h b/js/src/builtin/Promise.h
index bb4778631..87d95f154 100644
--- a/js/src/builtin/Promise.h
+++ b/js/src/builtin/Promise.h
@@ -66,8 +66,10 @@ class PromiseObject : public NativeObject
         return getFixedSlot(PromiseSlot_ReactionsOrResult);
     }
 
-    MOZ_MUST_USE bool resolve(JSContext* cx, HandleValue resolutionValue);
-    MOZ_MUST_USE bool reject(JSContext* cx, HandleValue rejectionValue);
+    static MOZ_MUST_USE bool resolve(JSContext* cx, Handle<PromiseObject*> promise,
+                                     HandleValue resolutionValue);
+    static MOZ_MUST_USE bool reject(JSContext* cx, Handle<PromiseObject*> promise,
+                                    HandleValue rejectionValue);
 
     void onSettled(JSContext* cx);
 
diff --git a/js/src/jsapi.cpp b/js/src/jsapi.cpp
index 28282e384..e73865265 100644
--- a/js/src/jsapi.cpp
+++ b/js/src/jsapi.cpp
@@ -4925,8 +4925,8 @@ ResolveOrRejectPromise(JSContext* cx, JS::HandleObject promiseObj, JS::HandleVal
     }
 
     return reject
-           ? promise->reject(cx, resultOrReason)
-           : promise->resolve(cx, resultOrReason);
+           ? PromiseObject::reject(cx, promise, resultOrReason)
+           : PromiseObject::resolve(cx, promise, resultOrReason);
 }
 
 JS_PUBLIC_API(bool)
diff --git a/js/src/wasm/WasmJS.cpp b/js/src/wasm/WasmJS.cpp
index 3fbc81ac5..8d4f575b2 100644
--- a/js/src/wasm/WasmJS.cpp
+++ b/js/src/wasm/WasmJS.cpp
@@ -1659,7 +1659,7 @@ Reject(JSContext* cx, const CompileArgs& args, UniqueChars error, Handle<Promise
         if (!cx->getPendingException(&rejectionValue))
             return false;
 
-        return promise->reject(cx, rejectionValue);
+        return PromiseObject::reject(cx, promise, rejectionValue);
     }
 
     RootedObject stack(cx, promise->allocationSite());
@@ -1687,7 +1687,7 @@ Reject(JSContext* cx, const CompileArgs& args, UniqueChars error, Handle<Promise
         return false;
 
     RootedValue rejectionValue(cx, ObjectValue(*errorObj));
-    return promise->reject(cx, rejectionValue);
+    return PromiseObject::reject(cx, promise, rejectionValue);
 }
 
 static bool
@@ -1699,7 +1699,7 @@ ResolveCompilation(JSContext* cx, Module& module, Handle<PromiseObject*> promise
         return false;
 
     RootedValue resolutionValue(cx, ObjectValue(*moduleObj));
-    return promise->resolve(cx, resolutionValue);
+    return PromiseObject::resolve(cx, promise, resolutionValue);
 }
 
 struct CompileTask : PromiseTask
@@ -1734,7 +1734,7 @@ RejectWithPendingException(JSContext* cx, Handle<PromiseObject*> promise)
     if (!GetAndClearException(cx, &rejectionValue))
         return false;
 
-    return promise->reject(cx, rejectionValue);
+    return PromiseObject::reject(cx, promise, rejectionValue);
 }
 
 static bool
@@ -1822,7 +1822,7 @@ ResolveInstantiation(JSContext* cx, Module& module, HandleObject importObj,
         return false;
 
     val = ObjectValue(*resultObj);
-    return promise->resolve(cx, val);
+    return PromiseObject::resolve(cx, promise, val);
 }
 
 struct InstantiateTask : CompileTask
@@ -1894,7 +1894,7 @@ WebAssembly_instantiate(JSContext* cx, unsigned argc, Value* vp)
             return RejectWithPendingException(cx, promise, callArgs);
 
         RootedValue resolutionValue(cx, ObjectValue(*instanceObj));
-        if (!promise->resolve(cx, resolutionValue))
+        if (!PromiseObject::resolve(cx, promise, resolutionValue))
             return false;
     } else {
         auto task = cx->make_unique<InstantiateTask>(cx, promise, importObj);