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CA.swift
CyberaAgent Presents iOS Developer’s Meetup
LLDB Debugging
shoheiyokoyama
CA.swift
CyberaAgent Presents iOS Developer’s Meetup
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CA.swift
CyberaAgent Presents iOS Developer’s Meetup
shoheiyokoyama
shoheiyokoyama
shoheiyokoyam
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CA.swift
CyberaAgent Presents iOS Developer’s Meetup
The LLDB Debugger
A next generation, high-performance debugger.
LLDB is the default debugger in Xcode on Mac OS X
and supports debugging C, Objective-C and C++ on the
desktop and iOS devices and simulator.
The LLDB Debugger, WHAT IS LLDB?, https://lldb.llvm.org/index.html
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CyberaAgent Presents iOS Developer’s Meetup
[-options [option-value]] [argument [argument...]]
The LLDB Command
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CyberaAgent Presents iOS Developer’s Meetup
(lldb) breakpoint set --file hello.c --line 8
The LLDB Command
The LLDB Debugger, GDB TO LLDB COMMAND MAP, https://lldb.llvm.org/lldb-gdb.html
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(lldb) run
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ɾThe LLDB Debugging in C program
https://github.com/shoheiyokoyama/LLDB-Debugging/tree/master/c
ɾThe REPL and Debugger in Swift
https://github.com/shoheiyokoyama/LLDB-Debugging/tree/master/swift
For more detail…
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Advanced Debugging with Xcode and LLDB
WWDC 2018 - Session 412
https://developer.apple.com/videos/play/wwdc2018/412/
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The LLDB command
(lldb) expression val = something
Description:
Evaluate an expression on the current thread
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CyberaAgent Presents iOS Developer’s Meetup
The LLDB command
(lldb) expression label.text = “Hello LLDB”
Description:
In suspended state, the frame buffer isn't updated.
Run expression CATransaction.flush()
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CyberaAgent Presents iOS Developer’s Meetup
The LLDB command
(lldb) expression -O -- object
Description:
Display using a language-specific description API, if possible.
Output CustomDebugStringConvertible.debugDescription.
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CyberaAgent Presents iOS Developer’s Meetup
The LLDB command
(lldb) expression -O -- object
Description:
expression -O -- ==> po
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CyberaAgent Presents iOS Developer’s Meetup
The LLDB command
(lldb) po label.text = “Hello LLDB”
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For more detail…
ɾThe Debugging with Xcode and LLDB
https://github.com/shoheiyokoyama/LLDB-Debugging/tree/master/DBug
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The LLDB Debugging with Python
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(lldb) command script import ~/hello.py
Import python file
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Custom LLDB command
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Config file
~/.lldbinit
~/.lldbinit-Xcode
CLI:
Xcode:
command source ~/.lldbinit
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facebook / chisel
A collection of commands to assist in the debugging of iOS apps
https://github.com/facebook/chisel
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Enjoy LLDB debugging