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LLDB랑 친해지기

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1. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
2. • ( ) • " •
3. ? • Build • Build ! • ઁ؀۽ উؽ ݻ઴ Ҋஜ ࠽٘೧ࠆ !
4. LLVM? LLDB?
5. LLVM? • Low Level Virtual Machine , • Compiler Toolchain • Chris Lattner • Apple Compiler • , • LLVM Core, Clang, LLDB, libc++, compiler-rt ..
6. LLVM? Front-end Optimizer Code Generator IR: Intermediate Representation Source Code Machine Code IR Objective-C: Clang Swift: Swiftc
7. LLDB? • LLVM Debugger Component • C, C++, Objective-C, Swift • Xcode Debugger • LLVM • Clang Expression Parser, LLVM Disassembler
8. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Beyond “PO” LLDB
9. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
10. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab
11. watchpoint po breakpoint command apropo alias ivars type lookup sys frame variable image list pprotocol tv help keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
12. watchpoint po breakpoint command apropo alias ivars type lookup sys frame variable image list pprotocol tv help keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab ? (lldb) help breakpoint (lldb) help breakpoint read
13. watchpoint po breakpoint command apropo alias ivars type lookup sys frame variable image list pprotocol tv help keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab ? (lldb) apropo “reference count” The following commands may relate to 'reference count': refcount -- Inspect the reference count data for a Swift object
14. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
15. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Xcode IDE
16. Breakpoint Custom Action ?
17. Breakpoint Option Condition ݅઒ೡ ٸ݅ Break ౠ੿ പࣻ݅ఀ ޖद Action ࣻ೯ റ ೐۽Ӓ۔ ҅ࣘ प೯
18. Custom Action
19. Sharing git
20. Swift Error Breakpoint
21. Swift Error Breakpoint Swift Error Throw - Error Type
22. Exception Breakpoint
23. Exception Breakpoint Exception - Action po $arg1
24. Symbolic Breakpoint
25. Symbolic Breakpoint Break Symbol, Module
26. Symbolic Breakpoint Constraint Conflict : UIViewAlertForUnsatisfiableConstraints 

27. Symbolic Breakpoint Collection View Flow Layout Issue: UICollectionViewFlowLayoutBreakForInvalidSizes
28. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
29. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Breakpoint , Memory Read/Write Break Code
30. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Set (lldb) watchpoint set variable -w write user (lldb) w s v self Watchpoint created: Watchpoint 1: addr = 0x7 ee400b168 size = 8 state = enabled type = w declare @ ‘/Users/gaeun/ /ViewController.swift:25’ watchpoint spec = ‘user' new value: 0x00007 ba1506390 - ੌ߈੸ਵ۽ ୭؀ 4ѐө૑ ࢤࢿоמ - 8byteࠁ׮ ੘ইঠ Watch оמ
31. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Current watchpoints: Watchpoint 1: addr = 0x7 ee400b168 size = 8 state = enabled type = w declare @ ‘/Users/gaeun/ /DebuggingTest/ViewController.swift:25' watchpoint spec = 'self' new value: 0x00007 ba1506390 List (lldb) watchpoint list (lldb) w l
32. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab (lldb) watchpoint command add 1 Delete (lldb) watchpoint delete 1 1 watchpoints deleted Command प೯ೡ Command ୶оೞӝ
34. Break Command • Backtrace • “bactrace ended”
35. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
36. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab (lldb) language swift refcount self (lldb) la s refcount self 
 refcount data: (strong = 1, unowned = 0, weak = 0) Swiftীࢲ݅ ࢎਊоמೠ ݺ۸য
37. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab
38. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Module • Module : 
 Code / Plugin / Framework Dynamic Library Image Commandח “target modules”੄ SubCommand۽
39. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab • Module Symbol 
 • Private 
 Framework 
 Class, Method • Crash Report 
 Backtrace Symbolicating
40. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Dependency Module • UUID • Memory Address • Path
41. . . .
43. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Module Symbol (lldb) image dump symtab Alamo re -s adress • Alamo re Symbol
46. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Symbol Filtering • UINavigationBar “set ” Method 
 (lldb) image lookup -rn ‘\[UINavigationBar\ set\’ 

49. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Crash Log Backtrace Symbolicating Last Exception Backtrace: 0 CoreFoundation 0x000000018708b100 0x186f80000 + 1093888 1 libobjc.A.dylib 0x00000001939441fc 0x19393c000 + 33276 2 CoreFoundation 0x000000018708b040 0x186f80000 + 1093696 3 ExampleApp 0x000000010003acc4 0x10002c000 + 60612 StackAddress LoadAddress Offset SlideValue : 32-bitח 0x4000, 64-bitח 0x100000000 FileAddress = StackAddress - LoadAddress + Slide = O set + Slide
50. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab Crash Log Backtrace Symbolicating (lldb) target create --arch arm64 ExampleApp.dSYM Current executable set to ExampleApp.dSYM' (arm64). (lldb) image lookup --address 0x10000ECC4 Address: ExampleApp.dSYM[0x000000010000ecc4] (ExampleApp.dSYM.__TEXT.__text + 29916) Summary: ExampleApp.dSYM`-[ExampleClass buggyFunction] + 68 at ExampleClass.m:181
51. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab UI Debugging
52. View Hierarchy AutoLayout Trace (lldb) po [[UIWindow keyWindow] _autolayoutTrace]
53. ViewController Hierarchy (lldb) po [UIViewController _printHierarchy]
54. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab
55. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup continue next rbreak image dump symtab (lldb) command alias pojc expr -l objc++ -O -- (lldb) command alias “ ”
56. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab
57. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab Command , ~/.lldbinit • Custom Command Alias • LLDB Script • Chisel (Facebook)
 https://github.com/facebook/chisel • DerekSelander
 https://github.com/DerekSelander/LLDB
58. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab Derek Selander https://github.com/DerekSelander/LLDB
59. watchpoint breakpoint help command alias ivars apropo type lookup sbt frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup tv continue rbreak image dump symtab
60. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup tv continue rbreak image dump symtab Protocol Required/Optional Method (Objective-C Only)
62. watchpoint breakpoint help command alias ivars apropo type lookup sbt frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup tv continue rbreak image dump symtab Backtrace Symbolicating (Objective-C Symbol only)
64. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup tv continue rbreak image dump symtab Keychain DataBase
66. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup tv continue rbreak image dump symtab View isHidden Toggle
67. watchpoint po breakpoint help command alias ivars apropo type lookup sbt frame variable image list pprotocol tv keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup continue next rbreak image dump symtab
68. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read /.lldbinit image lookup tv continue rbreak image dump symtab Reference
69. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup tv continue rbreak image dump symtab #WWDC16 Debugging Tips and Tricks #WWDC18 Advanced Debugging with Xcode and LLDB Advanced Apple Debugging & Reverse Engineering https://llvm.org/ https://github.com/DerekSelander/LLDB
70. watchpoint po breakpoint help command alias ivars apropo type lookup sys frame variable image list next pprotocol keychain p backtrace jump expression refcount thread info step register read ./lldbinit image lookup tv continue rbreak image dump symtab