macho/research/custom_loader/a.mm

#import <Foundation/Foundation.h>
#include <stdio.h>

@interface Foo : NSObject
@end

@implementation Foo
- (void)bar {
  NSLog(@"%@", self);
}
@end

@interface Bar : NSObject
@end

@implementation Bar
+ (void)load {
  NSLog(@"%@", self);
  printf("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\n");
}
@end

// @implementation Baz : Bar
// @end



__attribute__((constructor)) static void
hmmge() {
// create a dummy blank function to be replaced to call OBJC load
printf("hmmge\n");
}

int main(int argc, const char * argv[]) {
  @autoreleasepool {
    NSLog(@"Hello, World!");
    Foo *foo = [[Foo alloc] init];
    [foo bar];
  }
  return 0;
}