class-dump outputs some id *; are they correct, or is there a bug?

[rgoldberg]

The following command:

ipsw class-dump --headers --output . /System/Volumes/Preboot/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_arm64e -- AppStoreDaemon

Generated the following ASDServiceBroker.h file, which includes id * parameter types. Normally, id is used, but not id *.

Is there any possibility that the id * are actually id, and they are the result of a bug?

//
//   Generated by https://github.com/blacktop/ipsw (Version: 3.1.627, BuildCommit: Homebrew)
//
//    - LC_BUILD_VERSION:  Platform: macOS, MinOS: 26, SDK: 26, Tool: ld (1220.3)
//    - LC_BUILD_VERSION:  Platform: macCatalyst, MinOS: 26, SDK: 26, Tool: ld (1220.3)
//    - LC_SOURCE_VERSION: 12.0.68.1.2
//
#ifndef ASDServiceBroker_h
#define ASDServiceBroker_h
@import Foundation;

@protocol OS_dispatch_queue;

@interface ASDServiceBroker : NSObject {
    /* instance variables */
    NSXPCConnection *_connection;
    NSXPCConnection *_daemonConnection;
    NSObject<OS_dispatch_queue> *_dispatchQueue;
    NSString *_machServiceName;
    int _token;
}

/* class methods */
+ (id)defaultBroker;
+ (id)newBrokerForMachServiceName:(id)name;
+ (id)interface;

/* instance methods */
- (id)getUpdatesServiceWithError:(id *)error;
- (id)initWithMachServiceName:(id)name;
- (void)getPurchaseHistoryServiceWithCompletionHandler:(id /* block */)handler;
- (id)getBackgroundAssetsServiceWithError:(id *)error;
- (void)dealloc;
- (void)getManagedAppServiceWithCompletionHandler:(id /* block */)handler;
- (void)getRepairServiceWithCompletionHandler:(id /* block */)handler;
- (id)getInstallationServiceWithError:(id *)error;
- (void)getMacDaemonManagedServiceWithCompletionHandler:(id /* block */)handler;
- (id)getTestFlightFeedbackServiceWithError:(id *)error;
- (void)getUpdatesServiceWithCompletionHandler:(id /* block */)handler;
- (id)getMacDaemonManagedServiceWithError:(id *)error;
- (id)getPurchaseServiceWithError:(id *)error;
- (void)getAppMetricsServiceWithCompletionHandler:(id /* block */)handler;
- (void)getAppStoreServiceWithCompletionHandler:(id /* block */)handler;
- (id)getIAPHistoryServiceWithError:(id *)error;
- (void)setSupportedNotificationDelivery:(id)delivery;
- (void)getInstallationServiceWithCompletionHandler:(id /* block */)handler;
- (id)getLibraryServiceWithError:(id *)error;
- (void)getRestoreServiceWithCompletionHandler:(id /* block */)handler;
- (void)getLibraryServiceWithCompletionHandler:(id /* block */)handler;
- (void)getOcelotServiceWithCompletionHandler:(id /* block */)handler;
- (id)getRepairServiceWithError:(id *)error;
- (void)getCrossfireServiceWithCompletionHandler:(id /* block */)handler;
- (void)getDiagnosticServiceWithCompletionHandler:(id /* block */)handler;
- (id)getManagedAppServiceWithError:(id *)error;
- (void)getIAPHistoryServiceWithCompletionHandler:(id /* block */)handler;
- (void)getPurchaseServiceWithCompletionHandler:(id /* block */)handler;
- (void)getTestFlightFeedbackServiceWithCompletionHandler:(id /* block */)handler;
- (id)getFairPlayServiceWithError:(id *)error;
- (id)getDiagnosticServiceWithError:(id *)error;
- (id)getPurchaseHistoryServiceWithError:(id *)error;
- (id)getStoreKitExternalNotificationServiceWithError:(id *)error;

@end

#endif /* ASDServiceBroker_h */

[blacktop]

ObjC method metadata does not preserve the pointee class name once another pointer layer is added. NSError **, NSURL **, or even id * all collapse to the same ^@ encoding, so downstream
printers cannot disambiguate them without supplemental information (debug info, Swift metadata, manual annotations, etc.).

Because of that lossiness, the safest thing the header generator can emit is id *. Printing just id would be wrong for real out-parameters like NSError **, and there is no runtime signal
that would let us promote it back to NSError * automatically.

[rgoldberg]

Thanks. From what you said, I assume that the id * are correct types.