Dumping available XPC interface and methods

Question

I'm reading this article, and it says:

The following functions are exposed over XPC to the caller:

@protocol _TtP4main21ForkLiftHelperProtcol_
- (void)changePermissions:(NSString *)arg1 permissions:(long long)arg2 reply:(void (^)(NSError *))arg3;
- (void)changeOwner:(NSString *)arg1 owner:(long long)arg2 group:(long long)arg3 reply:(void (^)(NSError *))arg4;
...

How can one dump all the protocols and its methods?

Answer 1

Found it: https://github.com/nygard/class-dump

class-dump is a command-line utility for examining the Objective-C segment of Mach-O files. It generates declarations for the classes, categories and protocols. This is the same information provided by using 'otool -ov', but presented as normal Objective-C declarations

It works for PrivilegedHelperTools mostly, but not for normal applications.