[Bug]: How to handle block function

[zacard-orc]

What are the steps to reproduce this issue?

all the step build no error

What happens?

can't catch wrap of block function.

when i use this code

typedef void(^ozrsp)(id rsp);

%hook xxxx
- (id)requesurl:(id)arg1 data:(id)arg2 succ:(id)arg3{
void(^rspblock)(id) = ^(id xsp) {
    NSLog(@"lin rsp = %@",xsp);
	if(xsp){
		return arg3(xsp);
	} else{
		return arg3();
	}
};
return %orig(arg1,arg2,rspblock);
}

%end

and then only get this result when using xcode console nslog output

default	11:10:55.144596+0800	OZ	lin url = https://i.bzz.com/service/settings/v2/
default	11:10:55.144614+0800	OZ	lin cb = <__NSMallocBlock__: 0x28383d350>
default	11:10:55.195818+0800	OZ	lin rsp = (null)

but when i using frida with the similar syntex it can get callback response

What were you expecting to happen?

I hope to catch the origin response in block function

Paste any relevant logs, error output, etc.

No response

Additional context

No response

What OS are you seeing the problem on?

macOS

What OS version does it have installed?

12

What toolchain and version are you using?

xcode13

Which SDK version are you using?

11

What OS is your client device running?

iOS

What OS version does it have installed?

13

Which device model is it?

iphone7

Which jailbreak is it using (if relevant)?

No response

[kirb]

You may need to copy the block. By default a block is NSStackBlock, which as you can imagine, is expected to only live for a short period of time entirely on the stack. Copying will give you an NSMallocBlock that can live in the heap. As the original block is an NSMallocBlock, you likely need to do that to match. Blocks respond to -copy, so you can try:

return %orig(arg1, arg2, [respblock copy]);

[zacard-orc]

thx, I got it
I retry the code and recv the right response 😃