Migrate away from EXPORTED_FUNCTIONS for test_fs_idbfs_sync (#24864)

Author: handlerug

test/fs/test_idbfs_sync.c

@@ -20,6 +20,7 @@ EM_JS_DEPS(deps, "$callUserCallback");
 
 bool test_complete = false;
 
+EMSCRIPTEN_KEEPALIVE
 void finish() {
   printf("finish\n");
   test_complete = true;
@@ -38,6 +39,7 @@ void cleanup() {
   EM_ASM(FS.syncfs(function(){})); // And persist deleted changes
 }
 
+EMSCRIPTEN_KEEPALIVE
 void test() {
   int fd, res;
   struct stat st;

test/test_browser.py

@@ -1349,9 +1349,9 @@ def test_fflush(self):
   })
   def test_fs_idbfs_sync(self, args):
     secret = str(time.time())
-    self.btest_exit('fs/test_idbfs_sync.c', cflags=['-lidbfs.js', f'-DSECRET="{secret}"', '-sEXPORTED_FUNCTIONS=_main,_test,_finish', '-lidbfs.js'] + args + ['-DFIRST'])
+    self.btest_exit('fs/test_idbfs_sync.c', cflags=['-lidbfs.js', f'-DSECRET="{secret}"', '-lidbfs.js'] + args + ['-DFIRST'])
     print('done first half')
-    self.btest_exit('fs/test_idbfs_sync.c', cflags=['-lidbfs.js', f'-DSECRET="{secret}"', '-sEXPORTED_FUNCTIONS=_main,_test,_finish', '-lidbfs.js'] + args)
+    self.btest_exit('fs/test_idbfs_sync.c', cflags=['-lidbfs.js', f'-DSECRET="{secret}"', '-lidbfs.js'] + args)
 
   def test_fs_idbfs_fsync(self):
     # sync from persisted state into memory before main()