lldb断点命令在XCode 8中不起作用

Question

EDIT: It now appears that it's not limited to frame info but in fact, NONE of the breakpoint command add commands work. They will only work if typed in manually at an (lldb) command prompt

I set some breakpoints in LLDB via the XCode console, to examine a class and how it's used in code.

(lldb) breakpoint set --func-regex "DVLayer"

Breakpoint 7: 73 locations.

(lldb) breakpoint command add 7

Enter your debugger command(s). Type 'DONE' to end.

 frame info

 continue

 DONE

This has worked fine in all previous versions of XCode going back to XCode 4. Now however, all I get are these statements in the console, and no frame info. I have tried the breakpoint commands on 5 different classes, and it worked on none of them... always this output.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Command #2 'continue' continued the target.

Also note that THIS ONLY FAILS TO WORK INSIDE A breakpoint command add statement

If I am simply stopped at a breakpoint in LLDB at the (lldb) command prompt, I can type frame info and it works as expected, however, as indicated above, adding frame info as a breakpoint command completely fails with the output above.

Answer 1

The following workaround worked for me in Xcode 8.0:

(lldb) breakpoint set --func-regex "setTitle"
Breakpoint 2: 296 locations.
(lldb) breakpoint command add --script-type python 2
Enter your Python command(s). Type 'DONE' to end.
def function (frame, bp_loc, internal_dict):
    """frame: the lldb.SBFrame for the location at which you stopped
       bp_loc: an lldb.SBBreakpointLocation for the breakpoint location information
       internal_dict: an LLDB support object not to be used"""
    print str(frame)
    frame.GetThread().GetProcess().Continue()
    DONE
(lldb) 
frame #0: 0x00000001879ca4b8 UIKit`-[UIButton _setTitleShadowOffset:]
frame #0: 0x00000001879ca4b8 UIKit`-[UIButton _setTitleShadowOffset:]
frame #0: 0x00000001879ca4b8 UIKit`-[UIButton _setTitleShadowOffset:]
frame #0: 0x000000018781ef68 UIKit`-[UIButton setTitleColor:forState:]
frame #0: 0x000000018781efb4 UIKit`-[UIButtonContent setTitleColor:]
frame #0: 0x000000018781ef68 UIKit`-[UIButton setTitleColor:forState:]
frame #0: 0x000000018781efb4 UIKit`-[UIButtonContent setTitleColor:]
frame #0: 0x000000018781ef68 UIKit`-[UIButton setTitleColor:forState:]
frame #0: 0x000000018781efb4 UIKit`-[UIButtonContent setTitleColor:]
frame #0: 0x000000018781edec UIKit`-[UIButton setTitle:forState:]
frame #0: 0x000000018781ee6c UIKit`-[UIButtonContent setTitle:]

EDIT: More info: I could not get external python scripts going in Xcode 8.

EDIT: link to LLDB python commands: https://lldb.llvm.org/python-reference.html