LLDB调试

常用指令

continue /  c    执行到下一个断点

next / n           单步运行 把子函数当作整体

step / s           单步运行 遇到函数会进去

memory read / x   读取内存地址中的值

---

增加断点的方法

@implementation ViewController

- (void)lldbDemo:(id)parame {}

void test() {}

breakpoint set -n 

$breakpoint set -n test

breakpoint set -n 

$breakpoint set -n "-[ViewController lldbDemo:]"

b -n  

$b -n  "-[ViewController lldbDemo:]"

b -[ViewController touchesBegan:withEvent:]

$b -[ViewController lldbDemo:]

breakpoint set --selector  /  b     

将所有的同名方法都加断点

$breakpoint set --selector lldbDemo

$b lldbDemo

breakpoint set --file  --selector 

$breakpoint set --file  ViewController.m --selector lldbDemo:

breakpoint list   /   break list

$break list

Current breakpoints:1: file = '~/ViewController.m', line = 27, exact_match = 0, locations = 1, resolved = 1, hit count = 1 

1.1: where = lldbDemo`-[ViewController touchesBegan:withEvent:] + 80 at ViewController.m:28, address = 0x00000001087b1730, resolved, hit count = 1 2: name = '-[ViewController lldbDemo:]', locations = 1, resolved = 1, hit count = 0 

2.1: where = lldbDemo`-[ViewController lldbDemo:] + 47 at ViewController.m:24, address = 0x00000001087b16cf, resolved, hit count = 0 

breakpoint disable  /   break dis     breakpoint enable  /  break en

$break dis 1.1

$break en 2.1

Current breakpoints:1: file = '~/ViewController.m', line = 27, exact_match = 0, locations = 1   

1.1: where = lldbDemo`-[ViewController touchesBegan:withEvent:] + 80 at ViewController.m:28, address = 0x00000001087b1730, unresolved, hit count = 1 2: name = '-[ViewController lldbDemo:]', locations = 1, resolved = 1, hit count = 0  Options: disabled

2.1: where = lldbDemo`-[ViewController lldbDemo:] + 47 at ViewController.m:24, address = 0x00000001087b16cf, resolved, hit count = 0  Options: enabled

breakpoint delete

只能删除整个大类，删除分类时只是将分类设为disable

$breakpoint delete

About to delete all breakpoints, do you want to do that?: [Y/n]

$breakpoint delete 1.1  

1.1: where = lldbDemo`-[ViewController touchesBegan:withEvent:] + 80 at ViewController.m:28, address = 0x00000001087b1730, unresolved, hit count = 1 2: name = '-[ViewController lldbDemo:]', locations = 1, resolved = 1, hit count = 0  Options: disabled

breakpoint set -r   

遍历满足项目中所有方法的关键字

 $breakpoint set -r touches

Breakpoint 5: 359 locations.

---

修改参数值

expression /  p

#import "Person.h"

@implementation ViewController

- (void)viewDidLoad {

    Person *p = [[Person alloc] init];

    [self.personModels addObject:p];

}

$p (Person *)self.personModels.firstObject    //获取参数内存地址

(Person *) $1 = 0x000060000002fe20

$p $1 .name = @""   //修改属性

$p &person->_name  //查看属性

---

断点轨迹调试

backTrack   /   bt

查看断点历史轨迹

$bt

* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1   * frame #0: 0x000000010b43e730 lldbDemo`-[ViewController touchesBegan:withEvent:](self=0x00007fdc3f60d7c0, _cmd="touchesBegan:withEvent:", touches=1 element, event=0x000060800011c170) at ViewController.m:28 

frame #1: 0x000000010c8077c7 UIKit`forwardTouchMethod + 340    

frame #2: 0x000000010c807662 UIKit`-[UIResponder touchesBegan:withEvent:] + 49    

frame #3: 0x000000010c64fe7a UIKit`-[UIWindow _sendTouchesForEvent:] + 2052    

frame #4: 0x000000010c651821 UIKit`-[UIWindow sendEvent:] + 4086    

frame #5: 0x000000010c5f5370 UIKit`-[UIApplication sendEvent:] + 352    

frame #6: 0x000000010cf3657f UIKit`__dispatchPreprocessedEventFromEventQueue + 2796    

frame #7: 0x000000010cf39194 UIKit`__handleEventQueueInternal + 5949    

frame #8: 0x000000010eec7bb1 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17    

frame #9: 0x000000010eeac4af CoreFoundation`__CFRunLoopDoSources0 + 271    

frame #10: 0x000000010eeaba6f CoreFoundation`__CFRunLoopRun + 1263    

frame #11: 0x000000010eeab30b CoreFoundation`CFRunLoopRunSpecific + 635    

frame #12: 0x0000000111813a73 GraphicsServices`GSEventRunModal + 62    

frame #13: 0x000000010c5da0b7 UIKit`UIApplicationMain + 159    

frame #14: 0x000000010b43e7bf lldbDemo`main(argc=1, argv=0x00007ffee47c1060) at main.m:14    

frame #15: 0x0000000110102955 libdyld.dylib`start + 1

up  down

更改断点位置

frame select

直接跳到指定断点

$frame select 2

frame variable

打印断点所在位置的所有属性

$frame variable

(ViewController *) self = 0x00007fdc3f60d7c0

(SEL) _cmd = "touchesBegan:withEvent:"

(__NSSetM *) touches = 0x000060400002b940 1 element

(UITouchesEvent *) event = 0x000060800011c170

thread return

断点执行到上一个，但是结束断点之后不会在执行之后的代码

---

观察内存断点

watchpoint set variable

$watchpoint set variable p->_name     //当name属性的值发生变化时，断点自动执行到当前函数中

watchpoint set expression

通过内存地址添加观察断点

$watchpoint set expression 0x000060400003c808 

watchpoint list

watchpoint delete

使用方法参考breakpoint

---

添加指令

break command add

$break list

1.1 ...

2.1...

$break command add 1.1

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

>  frame variable   // 输入要执行的代码

break command list

break command delete 

$break command list 1.1

Breakpoint 1.1:    

Breakpoint commands:      

frame variable

target stop-hook add    /   target stop-hook add -o

将所有断点都添加指令

$target stop-hook add -o "frame variable"

target stop-hook list

target stop-hook delete   /  undisplay

target stop-hook disable

---

查看异常指针

'NSRangeException', reason: '*** -[__NSArray0 objectAtIndex:]: index 0 beyond bounds for empty NSArray'

*** First throw call stack:

( 0   CoreFoundation                      0x00000001068711e6 __exceptionPreprocess + 294

1   libobjc.A.dylib                     0x0000000105f06031 objc_exception_throw + 48

2   CoreFoundation                      0x0000000106889e3d -[__NSArray0 objectAtIndex:] + 93

3   lldbDemo                            0x00000001056066d1 -[ViewController touchesBegan:withEvent:] + 129

4   UIKit                               0x0000000106f1b7c7 forwardTouchMethod + 340

5   UIKit                               0x0000000106f1b662 -[UIResponder touchesBegan:withEvent:] + 49

6   UIKit                               0x0000000106d63e7a -[UIWindow _sendTouchesForEvent:] + 2052

7   UIKit                               0x0000000106d65821 -[UIWindow sendEvent:] + 4086

8   UIKit                               0x0000000106d09370 -[UIApplication sendEvent:] + 352

9   UIKit                               0x000000010764a57f __dispatchPreprocessedEventFromEventQueue + 2796

10  UIKit                               0x000000010764d194 __handleEventQueueInternal + 5949

11  CoreFoundation                      0x0000000106813bb1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17

12  CoreFoundation                      0x00000001067f84af __CFRunLoopDoSources0 + 271

13  CoreFoundation                      0x00000001067f7a6f __CFRunLoopRun + 1263

14  CoreFoundation                      0x00000001067f730b CFRunLoopRunSpecific + 635

15  GraphicsServices                    0x000000010b9dba73 GSEventRunModal + 62

16  UIKit                               0x0000000106cee0b7 UIApplicationMain + 159

17  lldbDemo                            0x000000010560679f main + 111

18  libdyld.dylib                       0x000000010a2ca955 start + 1

19  ???                                 0x0000000000000001 0x0 + 1 )

image lookup -a 

查看异常指针

$image lookup -a 0x00000001056066d1

 Address: lldbDemo[0x00000001000016d1] (lldbDemo.__TEXT.__text + 257)       Summary: lldbDemo`-[ViewController touchesBegan:withEvent:] + 129 at ViewController.m:28

image lookup -t

查看一个类信息

$image lookup -t ViewController

Best match found in ~/lldbDemo.app/lldbDemo: id = {0x10000002b}, name = "ViewController", byte-size = 8, decl = ViewController.h:11, compiler_type = "@interface ViewController : UIViewController @end"