help breakpoint
Commands for operating on breakpoints (see 'help b'for shorthand.)
Syntax: breakpoint
The following subcommands are supported:
clear -- Delete or disable breakpoints matching the specified source
file and line.
command -- Commands for adding, removing and listing LLDB commands
executed when a breakpoint is hit.
delete -- Delete the specified breakpoint(s). If no breakpoints are
specified, delete them all.
disable -- Disable the specified breakpoint(s) without deleting them. If
none are specified, disable all breakpoints.
enable -- Enable the specified disabled breakpoint(s). If no breakpoints
are specified, enable all of them.
list -- List some or all breakpoints at configurable levels of detail.
modify -- Modify the options on a breakpoint or set of breakpoints in
the executable. If no breakpoint is specified, acts on the
last created breakpoint. With the exception of -e, -d and -i,
passing an empty argument clears the modification.
name -- Commands to manage name tags for breakpoints
read -- Read and set the breakpoints previously saved to a file with
"breakpoint write".
set -- Sets a breakpoint or set of breakpoints in the executable.
write -- Write the breakpoints listed to a file that can be readin
with "breakpoint read". If given no arguments, writes all
breakpoints.
For more help on any particular subcommand, type'help <command> <subcommand>'.
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設定所有的save:方法的斷點 breakpoint set --selector save:
設定某個檔案中的save:方法的斷點：breakpoint set --file ViewController.m --selector save:
全域性遍歷專案中所有方法名中包含某欄位的斷點：breakpoint set -r Game:
二 執行程式碼進行除錯
expression 簡寫p
(lldb) expression self.view.subviews
(NSArray *) $0 = 0x0000000159e38920
(lldb) p self.view.backgroundColor = [UIColor yellowColor]
(UIColor *) $1 = 0x0000000159e837f0
(lldb) c
Process 80637 resuming
2018-05-07 16:20:42.198488+0800 001--LLDB[80637:7308534] XPC connection interrupted
2018-05-07 16:21:00.038626+0800 001--LLDB[80637:7308097] Status bar could not find cached time string image. Rendering in-process.
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列印物件:po self.view.subviews
舉個例子?：
在陣列中加入新的Person物件
(lldb) p [self.models addObject:[Person new]];
(lldb) p (Person *)self.models.lastObject
(Person *) $3 = 0x0000000101508080
(lldb) p $3.name = @"meryin"
(NSString *) $4 = 0xa006e697972656d6
(lldb) p $3.age = 20
(int) $5 = 20
(lldb) po $3.name
meryin
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設定變數然後再新增：
(lldb) p Person *p4 = [Person new]; //按住control和Enter鍵，繼續程式碼
p4.name = @"tom";p4.age = 25;
[self.models addObject:p4];//最後回車
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三 記憶體斷點
給某物件的某屬性下斷點：
(lldb) watchpoint set variable p1->_name
或者利用記憶體地址下斷點：
(lldb) frame variable
(ViewController *) self = 0x0000000105ec23b0
(SEL) _cmd = "viewDidLoad"
(Person *) p1 = 0x0000000105ea8190
(Person *) p2 = 0x0000000000000010
(Person *) p3 = 0x000000016f3e5528
(lldb) p &p1->_name
(NSString **) $2 = 0x0000000105ea81a0
(lldb) watchpoint set expression 0x0000000105ea81a0
Watchpoint created: Watchpoint 2: addr = 0x105ea81a0 size = 8 state = enabled type = w
new value: 4305584416
(lldb) watchpoint list
Number of supported hardware watchpoints: 4
Current watchpoints:
Watchpoint 2: addr = 0x105ea81a0 size = 8 state = enabled type = w
new value: 4305584416
(lldb)
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四 斷點後執行指令
(lldb) breakcommand add 1
Enter your debugger command(s). Type 'DONE' to end.
> p self //回車
> p self.models //回車
> DONE //回車
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(lldb) help image lookup
Look up information within executable and dependent shared library images.
Syntax:
Command Options Usage:
target modules lookup [-Av] -a <address-expression> [-o <offset>] [<filename> [<filename> [...]]]
target modules lookup [-Arv] -s <symbol> [<filename> [<filename> [...]]]
target modules lookup [-Aiv] -f <filename> [-l <linenum>] [<filename> [<filename> [...]]]
target modules lookup [-Airv] -F <function-name> [<filename> [<filename> [...]]]
target modules lookup [-Airv] -n <function-or-symbol> [<filename> [<filename> [...]]]
target modules lookup [-Av] -t <name> [<filename> [<filename> [...]]]
-A ( --all )
Print all matches, not just the best match, if a best match is
available.
-F <function-name> ( --function <function-name> )
Lookup a function by name in the debug symbols in one or more
target modules.
-a <address-expression> ( --address <address-expression> )
Lookup an address in one or more target modules.
-f <filename> ( --file <filename> )
Lookup a file by fullpath or basename in one or more target
modules.
-i ( --no-inlines )
Ignore inline entries (must be used in conjunction with --file or
--function).
-l <linenum> ( --line <linenum> )
Lookup a line number in a file (must be used in conjunction with
--file).
-n <function-or-symbol> ( --name <function-or-symbol> )
Lookup a function or symbol by name in one or more target modules.
-o <offset> ( --offset <offset> )
When looking up an address subtract <offset> from any addresses
before doing the lookup.
-r ( --regex )
The <name> argument for name lookups are regular expressions.
-s <symbol> ( --symbol <symbol> )
Lookup a symbol by name in the symbol tables in one or more target
modules.
-t <name> ( --type <name> )
Lookup a type by name in the debug symbols in one or more target
modules.
-v ( --verbose )
Enable verbose lookup information.
This command takes options and free-form arguments. If your arguments
resemble option specifiers (i.e., they start with a - or --), you must use
' -- ' between the end of the command options and the beginning of the
arguments.
'image' is an abbreviation for'target modules'複製程式碼
檢視崩潰資訊
比如陣列越界的崩潰資訊：
*** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndexedSubscript:]: index 4 beyond bounds [0 .. 2]'
*** First throw call stack:
(0x184b4ed8c 0x183d085ec 0x184ae7750 0x184ad48cc 0x1007ae328 0x18ea61870 0x18e9077c8 0x18e901830 0x18e8f68f8 0x18e8f5238 0x18f0d6c0c 0x18f0d91b8 0x18f0d2258 0x184af7404 0x184af6c2c 0x184af479c 0x184a14da8 0x1869f7020 0x18e9f578c 0x1007ae52c 0x1844a5fc0)
libc++abi.dylib: terminating with uncaught exception of type NSException
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