Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
LLDB
Search
Khoa Pham
August 27, 2015
Programming
0
430
LLDB
Tips on using LLDB
Khoa Pham
August 27, 2015
Tweet
Share
More Decks by Khoa Pham
See All by Khoa Pham
Introduction to Swiftlane
onmyway133
0
160
Better AppStore rating
onmyway133
0
580
Pragmatic Machine Learning for mobile apps
onmyway133
0
440
Unit Testing in iOS
onmyway133
0
540
Getting started with Flutter
onmyway133
2
650
From Xcode plugin to Xcode extension
onmyway133
0
430
Collection Update
onmyway133
4
430
A Taste of MVVM + RxSwift
onmyway133
1
590
Block
onmyway133
0
560
Other Decks in Programming
See All in Programming
AI Coding Agentのセキュリティリスク:PRの自己承認とメルカリの対策
s3h
0
230
そのAPI、誰のため? Androidライブラリ設計における利用者目線の実践テクニック
mkeeda
2
1.8k
AWS発のAIエディタKiroを使ってみた
iriikeita
1
190
RDoc meets YARD
okuramasafumi
4
170
今から始めるClaude Code入門〜AIコーディングエージェントの歴史と導入〜
nokomoro3
0
210
Kiroで始めるAI-DLC
kaonash
2
610
より安全で効率的な Go コードへ: Protocol Buffers Opaque API の導入
shwatanap
2
360
チームのテスト力を鍛える
goyoki
3
710
HTMLの品質ってなんだっけ? “HTMLクライテリア”の設計と実践
unachang113
4
2.9k
実用的なGOCACHEPROG実装をするために / golang.tokyo #40
mazrean
1
290
Android端末で実現するオンデバイスLLM 2025
masayukisuda
1
170
Laravel Boost 超入門
fire_arlo
3
220
Featured
See All Featured
The Language of Interfaces
destraynor
161
25k
Become a Pro
speakerdeck
PRO
29
5.5k
Connecting the Dots Between Site Speed, User Experience & Your Business [WebExpo 2025]
tammyeverts
8
530
Faster Mobile Websites
deanohume
309
31k
Practical Orchestrator
shlominoach
190
11k
Done Done
chrislema
185
16k
[RailsConf 2023 Opening Keynote] The Magic of Rails
eileencodes
30
9.7k
The Web Performance Landscape in 2024 [PerfNow 2024]
tammyeverts
9
810
Sharpening the Axe: The Primacy of Toolmaking
bcantrill
44
2.5k
Optimizing for Happiness
mojombo
379
70k
Bootstrapping a Software Product
garrettdimon
PRO
307
110k
Cheating the UX When There Is Nothing More to Optimize - PixelPioneers
stephaniewalter
285
13k
Transcript
LLDB Khoa Pham - 2359 Media
LLDB Home page http://lldb.llvm.org/ LLDB is an open-source debugger that
features a REPL, along with C++ and Python plugins
Menu - Command - Use cases - Python - Chisel
- Standalone
Command
Command - help Information on any command help print help
thread continue help help
Command - print Print value print a print self
Command Prefix matching print, prin, pri, p expression, e Can’t
use pr (print or process?)
Command $ variable Anything starting with a dollar sign is
in LLDB’ s namespace and exists to help you print $0 + 7
Command - expression Evaluate an expression (ObjC++ or Swift) in
the current program context, Modify values in the program expression $0 = 10 e $0 = 10
Command - print 'print' is an abbreviation for 'expression --'.
Use -- to signify the end of the flags and the beginning of the input e --location -- -count
Command - print object See the description method of an
object e -O -- aString po aString
Command - variable The variable must start with a dollar
sign e NSInteger $b = 10; p $b + a
Command - flow Continue process continue, continue, c Step over
thread step-over, next, n
Command - flow Step into thread step-in, step, s Step
out thread step-out, finish
Command - thread return Executes the return command, jumping out
of the current stack frame thread return YES
Breakpoint List breakpoints br li Create breakpoints br set -f
ViewController.m 39
Use cases Find targets of a button po [self.myButton allTargets]
Use cases See the frame po self.view.frame e @import UIKit
po self.view.frame
Use cases Change background color without continue e self.view.backgroundColor =
[UIColor greenColor] e (void)[CATransaction flush]
Use cases Watch variable wivar self _number
Python LLDB has full, built-in Python support. If you type
script in LLDB, it will open a Python REPL
.lldbinit Executed every time LLDB starts command script import /path/to/fblldb.py
Chisel brew update brew install chisel # ~/.lldbinit command script
import /path/to/fblldb.py
Standalone Using LLDB as a Standalone Debugger
References - Getting Started with LLDB - Dancing in the
Debugger — A Waltz with LLDB - Video Tutorial: Using LLDB in iOS - Navigating and discovering an iOS codebase using lldb - chisel