Explicitly test JSPI version of dlopen. NFC (#19566)

Author: sbc100

src/library_dylink.js

@@ -1099,13 +1099,12 @@ var LibraryDylink = {
   _dlopen_js: function(handle) {
 #if ASYNCIFY
     return Asyncify.handleSleep((wakeUp) => {
-      var jsflags = { loadAsync: true }
-      var promise = dlopenInternal(handle, jsflags);
-      promise.then(wakeUp).catch(() => wakeUp(0));
+      dlopenInternal(handle, { loadAsync: true })
+        .then(wakeUp)
+        .catch(() => wakeUp(0));
     });
 #else
-    var jsflags = { loadAsync: false }
-    return dlopenInternal(handle, jsflags);
+    return dlopenInternal(handle, { loadAsync: false });
 #endif
   },
 
@@ -1125,8 +1124,7 @@ var LibraryDylink = {
     }
 
     {{{ runtimeKeepalivePush() }}}
-    var jsflags = { loadAsync: true }
-    var promise = dlopenInternal(handle, jsflags);
+    var promise = dlopenInternal(handle, { loadAsync: true });
     if (promise) {
       promise.then(successCallback, errorCallback);
     } else {

test/test_other.py

@@ -6644,16 +6644,25 @@ def test_dlopen_promise(self):
     self.set_setting('EXIT_RUNTIME')
     self.do_other_test('test_dlopen_promise.c')
 
-  def test_dlopen_blocking(self):
+  @parameterized({
+    # Under node this should work even without ASYNCIFY because we can do
+    # synchronous loading via readBinary
+    '': (0,),
+    'asyncify': (1,),
+    'jspi': (2,),
+  })
+  def test_dlopen_blocking(self, asyncify):
     self.run_process([EMCC, test_file('other/test_dlopen_blocking_side.c'), '-o', 'libside.so', '-sSIDE_MODULE'])
     self.set_setting('MAIN_MODULE', 2)
     self.set_setting('EXIT_RUNTIME')
     self.set_setting('NO_AUTOLOAD_DYLIBS')
+    if asyncify:
+      self.set_setting('ASYNCIFY', asyncify)
+      if asyncify == 2:
+        self.emcc_args.append('-Wno-experimental')
+        self.require_v8()
+        self.v8_args.append('--experimental-wasm-stack-switching')
     self.emcc_args.append('libside.so')
-    # Under node this should work both with and without ASYNCIFY
-    # because we can do synchronous readBinary
-    self.do_other_test('test_dlopen_blocking.c')
-    self.set_setting('ASYNCIFY')
     self.do_other_test('test_dlopen_blocking.c')
 
   def test_dlsym_rtld_default(self):