iOS-LLDB 常用命令梳理
Posted WeaterMr
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了iOS-LLDB 常用命令梳理相关的知识，希望对你有一定的参考价值。
ios-LLDB 常用命令梳理（一）
一，p命令在不同场景下的使用
1.p即expression命令 的简写：常规用法打印当前输出者的类型与对应的内存地址。$0 :xcode缓存中的局部变量
(lldb) p self
(ViewController *) $0 = 0x0000000122a06720
2.p命令 ：特殊用法可以进行 进制转化
(lldb) p 10 转十进制
(int) $2 = 10
(lldb) p/x 10 转十六进制
(int) $3 = 0x0000000a
(lldb) p/o 10 转八进制
(int) $4 = 012
(lldb) p/t 10 转二进制
(int) $5 = 0b00000000000000000000000000001010
(lldb)
等。。。。
3.p命令 ：修改变量值
- (IBAction)button1Thing:(id)sender {
[self.dataSource addObject:[GoodsTool new]];
[self text1:@"button1"];
}
-(void)text1:(NSString *)type{
NSLog(@"%@",type);
[self text2:type];
self.titleM=type;
}
-(void)text2:(NSString *)type{
[self text3:type];
self.titleM=type;
}
-(void)text3:(NSString *)type{
NSLog(@"%@",type);
self.titleM=type;
}
4.p命令 ：打印数组中对象属性时需要做强置类型转换。
未转化前
(lldb) p self.dataSource.lastObject
(GoodsTool *) $0 = 0x0000000282a22af0
(lldb) p $0.name
error: <user expression 1>:1:4: property 'name' not found on object of type 'id _Nullable'
$0.name
^
转换后
(lldb) p (GoodsTool *)self.dataSource.lastObject
(GoodsTool *) $1 = 0x0000000282a22af0
(lldb) p $1.name
(__NSCFConstantString *) $2 = 0x000000010459c008 @"shouji"
注意：通过p命令动态修改值时，当修改的为基本数据类型如int 将不起效。区别在于对象为指针，但是int是直接取得值。有本质上的区别。
5.po命令即 expression -O 的缩写:调用当前输出者的 Description 方法。
(lldb) po self
<ViewController: 0x122a06720>
二，断点添加命令及扩展
1.breakpoint set -n "-[ViewController text3:]"命令:添加断点。也可以同时添加多个：breakpoint set -n "-[ViewController text1:]" -n "-[ViewController text2:]"
(lldb) breakpoint set -n "-[ViewController text3:]"
Breakpoint 17: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818
2.br list"命令（br 是breakpoint 缩写）:对方法动态加断电。
(lldb) br list
Current breakpoints:
17: name = '-[ViewController text3:]', locations = 1, resolved = 1, hit count = 0
17.1: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818, resolved, hit count = 0
3.br list"命令（br 是breakpoint 缩写）:对方法动态加断电。
(lldb) br list
Current breakpoints:
17: name = '-[ViewController text3:]', locations = 1, resolved = 1, hit count = 0
17.1: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818, resolved, hit count = 0
4.br enable 17.1"和br disable 17.1命令:disable使某个断点失效，enable开启某个断电17.1对应断点id。
(lldb) br enable 17.1
1 breakpoints enabled.
(lldb) br list
Current breakpoints:
17: name = '-[ViewController text3:]', locations = 1, resolved = 1, hit count = 0
17.1: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818, resolved, hit count = 0
(lldb) br disable 17.1
1 breakpoints disabled.
(lldb) br list
Current breakpoints:
17: name = '-[ViewController text3:]', locations = 1
17.1: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818, unresolved, hit count = 0 Options: disabled
(lldb)
当使用 disabled 对应的断电后将会有一个Options: disabled
5.br delete 17.1"命令相当于br disable 17.1命令
(lldb) br list
Current breakpoints:
17: name = '-[ViewController text3:]', locations = 1, resolved = 1, hit count = 0
17.1: where = Goods`-[ViewController text3:] + 52 at ViewController.m:48:17, address = 0x0000000104ed1818, resolved, hit count = 0
6.br delete 17"命令：删除id 为17 这组的所有断点，不支持删除某个组中的单个断点
(lldb) br delete 17
1 breakpoints deleted; 0 breakpoint locations disabled.
(lldb) br list
Current breakpoints:
18: names = {'-[ViewController text1:]', '-[ViewController text2:]'}, locations = 2, resolved = 2, hit count = 0
18.1: where = Goods`-[ViewController text1:] + 52 at ViewController.m:37:17, address = 0x0000000104ed1700, resolved, hit count = 0
18.2: where = Goods`-[ViewController text2:] + 52 at ViewController.m:43:6, address = 0x0000000104ed1798, resolved, hit count = 0
(lldb)
7.br delete "命令：删除所有断点
(lldb) br delete
About to delete all breakpoints, do you want to do that?: [Y/n] y
All breakpoints removed. (1 breakpoint)
(lldb) br list
No breakpoints currently set.
(lldb)
三，断点操作
1.c命令和 continue：跳过当前的断点。
(lldb) c
Process 41940 resuming
(lldb) c
Process 41940 resuming
(lldb) c
Process 41940 resuming
2021-06-15 14:53:37.489940+0800 Goods[41940:8141509] 3333333
2.n和next命令 ：源代码级单步调试，可以进入子函数内部。
3.ni和 nexti命令 ：指令级单步调试，进入汇编流程。
-> 0x1043197a8 <+68>: adrp x2, 3
2021-06-15 15:11:47.411297+0800 Goods[42145:8155622] button1
(lldb) expression type=@"2222"
(NSTaggedPointerString *) $0 = 0xa32c96bca5103483 @"2222"
(lldb) n
(lldb) n
(lldb) n
2021-06-15 15:12:30.224760+0800 Goods[42145:8155622] 2222
(lldb)
四，堆栈信息打印
1.bt命令:打印当前的堆栈信息 。bt 5:打印前5条。
(lldb) bt 5
* thread #1, queue = 'com.apple.main-thread', stop reason = breakpoint 1.1
* frame #0: 0x0000000102605508 Goods`-[ViewController button1Thing:](self=0x0000000122a06720, _cmd="button1Thing:", sender=0x00000001228099e0) at ViewController.m:25:6
frame #1: 0x000000019e32d190 UIKitCore`-[UIApplication sendAction:to:from:forEvent:] + 100
frame #2: 0x000000019dc63fc4 UIKitCore`-[UIControl sendAction:to:forEvent:] + 208
frame #3: 0x000000019dc64318 UIKitCore`-[UIControl _sendActionsForEvents:withEvent:] + 356
frame #4: 0x000000019dc62b7c UIKitCore`-[UIControl touchesEnded:withEvent:] + 536
(lldb)
2.up命令:向上跟进指令。
(lldb) up
frame #1: 0x00000001001a57f4 Goods`-[ViewController text2:](self=0x00000001007069a0, _cmd="text2:", type=@"button1") at ViewController.m:49:5
46 self.titleM=type;
47 }
48 -(void)text2:(NSString *)type{
-> 49 [self text3:type];
^
50 self.titleM=type;
51
52 }
3.up命令:向上跟进指令。（若果没有源码，这里显示的将是对应方法的汇编代码）
(lldb) up
frame #1: 0x00000001001a57f4 Goods`-[ViewController text2:](self=0x00000001007069a0, _cmd="text2:", type=@"button1") at ViewController.m:49:5
46 self.titleM=type;
47 }
48 -(void)text2:(NSString *)type{
-> 49 [self text3:type];
^
50 self.titleM=type;
51
52 }
4.down命令:向下跟进指令。
(lldb) down
frame #0: 0x00000001001a5854 Goods`-[ViewController text3:](self=0x00000001007069a0, _cmd="text3:", type=@"button1") at ViewController.m:54:17
51
52 }
53 -(void)text3:(NSString *)type{
-> 54 NSLog(@"%@",type);
^
55 self.titleM=type;
56 }
57 - (NSMutableArray *)dataSource{
5.frame variable命令:查看对应方法的参数。
(lldb) frame select 3
frame #3: 0x00000001001a5588 Goods`-[ViewController button1Thing:](self=0x00000001007069a0, _cmd="button1Thing:", sender=0x000000010060ccc0) at ViewController.m:31:5
28 }
29 - (IBAction)button1Thing:(id)sender {
30 [self.dataSource addObject:[GoodsTool new]];
-> 31 [self text1:@"button1"];
^
32 }
33 - (IBAction)buttonThing2:(UIButton *)sender {
34 [self.dataSource addObject:[GoodsTool new]];
(lldb) frame variable
(ViewController *) self = 0x00000001007069a0
(SEL) _cmd = "button1Thing:"
(UIButton *) sender = 0x000000010060ccc0
6.thread return命令:线程回滚命令。我们在第三个方法做的打印但是当我们 使用 thread return 命令后线程回滚，直接就rethrn 掉，不再走text2，和text3.
-(void)text1:(NSString *)type{
[self text2:type];
self.titleM=type;
}
-(void)text2:(NSString *)type{
[self text3:type];
self.titleM=type;
}
-(void)text3:(NSString *)type{
断点在这 NSLog(@"%@",type);
self.titleM=type;
}
2021-06-15 21:34:56.226703+0800 Goods[42797:8263091] button1
(lldb) thread return
(lldb) thread return
(lldb) c
Process 42797 resuming
五，内存断点
1.watchpoint set variable good->_name 命令: good 为自定义对象，name 为属性。 观察对应的成员变量值的更改 当值发生改变时会自动断到，对应的内存中，显示更改前后的值。
-> 0x1afeecfdc <+52>: mov x0, x20
(lldb) watchpoint set variable good->_name
Watchpoint created: Watchpoint 1: addr = 0x280949f60 size = 8 state = enabled type = w
declare @ '/Users/mac/Desktop/Goods 2/Goods/ViewController.m:21'
watchpoint spec = 'good->_name'
new value: 0x0000000104cc0008
Watchpoint 1 hit:
old value: 0x0000000104cc0008
new value: 0x0000000104cc00e8
(lldb) po 0x0000000104cc0008
shouji
(lldb) po 0x0000000104cc00e8
gaibian
(lldb)
2.watchpoint set variable good->_name 命令: 和上面作用相同，方式不同。这是直接通过内存地址的值来监听对应的成员变量发生变化。
0x1afeecfdc <+52>: mov x0, x20
(lldb) p &good.name
error: <user expression 3>:1:1: address of property expression requested
&good.name
^~~~~~~~~~
(lldb) p &good->_name
(NSString **) $0 = 0x00000002818641c0
(lldb) watchpoint set expression 0x00000002818641c0
Watchpoint created: Watchpoint 1: addr = 0x2818641c0 size = 8 state = enabled type = w
new value: 4374822920
(lldb) c
Process 42826 resuming
(lldb) c
Process 42826 resuming
Watchpoint 1 hit:
old value: 4374822920
new value: 4374823144
(lldb) po 4374822920
shouji
(lldb) po 4374823144
gaibian
3.watchpoint list 命令: 内存断点列表
4.watchpoint delete 命令: 删除所有内存断点
(lldb) watchpoint list
Number of supported hardware watchpoints: 4
Current watchpoints:
Watchpoint 1: addr = 0x2818641c0 size = 8 state = enabled type = w
old value: 4374822920
new value: 4374823144
(lldb) watchpoint delete
About to delete all watchpoints, do you want to do that?: [Y/n] y
All watchpoints removed. (1 watchpoints)
(lldb) watchpoint list
Number of supported hardware watchpoints: 4
No watchpoints currently set.
(lldb)
六，给断点添加命令
1.breakpoint command add 4 命令（对应的也有delete ，list 命令）: 这里的4 表示第四组断点。
(lldb) breakpoint command add 4
Enter your debugger command(s). Type 'DONE' to end.
当输入命令回撤后将进入命令输入模式如下
> po self 打印自身
> po self.view 打印所有view视图
> DONE 以'DONE'结束
2021-06-15 22:19:03.252486+0800 Goods[42826:8280064] button1
po self
<ViewController: 0x105409a70>
po self.view
<UIView: 0x10540e490; frame = (0 0; 414 896); autoresize = W+H; layer = <CALayer: 0x281634440>>
2.target stop-hook add -o "frame variable" 命令（“frame variable” 可变的 “p self.view”,等: 类似于 hook 只要有断点就会打印对应的方法参数。
注意：
(lldb) target stop-hook add -o "frame variable"
Stop hook #1 added.
(lldb) target stop-hook list
Hook: 1
State: enabled
Commands:
frame variable
(lldb) c
Process 42832 resuming
2021-06-15 22:34:32.144961+0800 Goods[42832:8288061] button1
(ViewController *) self = 0x0000000105306aa0
(SEL) _cmd = "text3:"
(__NSCFConstantString *) type = 0x0000000104d800c8 @"button1"
(lldb)
3.可以将对应的命令写到lldb 的配置文件中。
打开终端 ：
➜ ~ ls -a
➜ ~ vim .lldbinit
添加：target stop-hook add -o "frame variable" 指令即可。
只要有断点就会打印对应参数
2021-06-15 22:49:29.475466+0800 Goodskubectl 常用命令梳理