在用編譯器調(diào)試之前，一次只使用幾個常規(guī)的調(diào)試命令。但是基于折騰的原理，今天列出了所有的調(diào)試命令和功能。

語言歌曲

快速列表在最后:下面是一些常見且重要的命令:

下面有更詳細(xì)的演示

如果您想了解關(guān)于編譯器調(diào)試命令的更多信息:

接下來，讓我們看看常見調(diào)試命令的用法:

一個

關(guān)于

列出與單詞或主題相關(guān)的調(diào)試器命令。

例如

(lldb)關(guān)于采購訂單

2

斷點

請看截圖文檔:

(lldb)斷點

它可以縮寫為br

功能很強(qiáng)大，下面詳細(xì)描述

三

斷點

重要的

四

印

(lldb)打印總和可以縮寫為(lldb) p總和

即印刷體寫成p。

在代碼中:varsums = ["0.00 "、" 0.00 "、" 0.00 "、" 0.00"]

調(diào)試窗口如下所示:

結(jié)果:

(lldb)打印總和([String]) $R14 = 4個值{[0]= " 0.00 "[1]= " 0.00 "[2]= " 0.00 "[3]= " 0.00 " }

如果要在命令行上打印十進(jìn)制數(shù):

輸入?yún)?shù)表示進(jìn)制 (e.g)p/x66(x表示16進(jìn)制)(Int) $R17 = 0x0000000000000042p/t6(t表示2進(jìn)制)(Int) $R20 = 0b0000000000000000000000000000000000000000000000000000000000000110p/c"s"(c表示字符)(String) $R24 = "s"

五

表達(dá)

直接更改其值，點擊繼續(xù)運行，運行的結(jié)果就是本次賦值后的結(jié)果

(lldb)表達(dá)式總和= ["10.00 "、" 0.00 "、" 0.00 "、" 0.00"]

示例:

更多用法:

作為對象打印:

表達(dá)式-o-sum可以縮寫如下:e-o-sum

其中:

e-o-sum可以寫成po，作用等價。

步驟

與進(jìn)程交互的命令當(dāng)然與它們背后的參數(shù)相匹配，以達(dá)到相應(yīng)的目的(lldb)進(jìn)程幫助如下:

舉個常見的栗子:

繼續(xù)-繼續(xù)執(zhí)行當(dāng)前進(jìn)程中的所有線程。

是繼續(xù)執(zhí)行程序，當(dāng)遇到斷點時，在LLDB中執(zhí)行就是繼續(xù)執(zhí)行程序

線

當(dāng)然，與進(jìn)程交互的命令與它們背后的參數(shù)相匹配，以達(dá)到相應(yīng)的目的(lldb)。線程幫助如下:

匹配參數(shù)命令執(zhí)行的功能將在后面描述。

這里我們應(yīng)該著重談幾個:

* **`(lldb)線程return`**過早地從堆棧返回，立即執(zhí)行return命令并退出當(dāng)前堆棧。可以偽裝一些退貨信息等等。從寫一些函數(shù)的行為等等?；究蚣?/p>

調(diào)試也使用其參數(shù)完成

一個常用的命令:

lldb)幀信息

打印出當(dāng)前行數(shù):項目名-類名-函數(shù)名

其他功能參考參數(shù)后面的解釋

看完上面的命令，我們來看看編譯器調(diào)試常用的幾個按鈕

從圖中可以看出，調(diào)試有四個按鈕

如果遇到如圖所示的第一個繼續(xù)，點擊它，程序?qū)⒄＿\行。如果有其他斷點，您將跳轉(zhuǎn)到下一個斷點。

Ps:點擊它，在LLDB調(diào)試框中輸入

(lldb) process continue具有相同的功能。

C的效果是一樣的

當(dāng)?shù)诙皆跀帱c處暫停時，單擊此按鈕，程序?qū)⒅鹦袌?zhí)行。即使調(diào)用了函數(shù)，也不會進(jìn)入函數(shù)，而是直接跳過這個函數(shù)的執(zhí)行，如下圖所示:

在第115行命中一個斷點，然后點擊這個按鈕，他就會執(zhí)行第116行，然后點擊它執(zhí)行第117行，而不是執(zhí)行第116行調(diào)用的函數(shù)中的那一行。

Ps:在程序中，與此按鈕功能相同的LLDB命令的參數(shù)是相同的命令:

(lldb) n

(lldb)下一個

(lldb)線程跨越

效果是一樣的

第三步進(jìn)入。它是真正的逐行執(zhí)行命令。即使執(zhí)行了函數(shù)，也會一行一行地跳轉(zhuǎn)到函數(shù)中執(zhí)行代碼。也就是說，想進(jìn)入功能的時候用。

Ps:在程序中，與此按鈕功能相同的LLDB命令的參數(shù)是相同的命令:

(lldb)線程介入

(lldb)步長

(lldb) s

第四步如果你輸入一個函數(shù)，運行一兩行后如果你想跳過這個函數(shù)，使用這個按鈕。其實它的操作就是一個棧的結(jié)束。

快速查看 Xcode 的所有斷點

如圖所示，這是通過單擊查看項目文件中的所有斷點

然后使用LLDB命令查看所有斷點:

(lldb) br list或(lldb) br李燦也達(dá)到同樣的目的

通過調(diào)試器中的LLDB快速創(chuàng)建斷點

使用以下命令完成115個斷點的設(shè)置

(lldb)斷點集-f ViewController.swift -l 115

這時，當(dāng)我們執(zhí)行繼續(xù)按鈕時，我們會發(fā)現(xiàn)我們已經(jīng)跳到了第115行的斷點。

我們通過大名單來看B，它的介紹是:

使用幾種速記格式之一設(shè)置斷點。

設(shè)置斷點的命令是:

swift:127在127設(shè)置斷點

Xcode UI屏幕上的條件執(zhí)行斷點

如圖:

從圖中可以看出:

第一步:我們在第24行遇到了一個斷點。

步驟2:我們看到標(biāo)記為2的框，其中i==2表示當(dāng)I等于2時將執(zhí)行該斷點

步驟3:我們看到標(biāo)記為3的框，這意味著LLDB將在執(zhí)行這個斷點時執(zhí)行po i的命令

第四步:我們看到標(biāo)有4的盒子。當(dāng)I為2時，執(zhí)行斷點的打印操作

其中ignore表示斷點只在第一次執(zhí)行，例如，如果ignore設(shè)置為2，斷點將在第三次調(diào)用時觸發(fā)。

所以重點來了:斷點程序會比較函數(shù)被執(zhí)行的次數(shù)和斷點。然后比較條件，滿足條件后執(zhí)行LLDB命令語句

+號可以支持多個LLDB命令。

其他斷點條件和執(zhí)行的命令等等。

動作背后更多功能！

如圖:

1.阿普爾

蘋果的腳本語言，可以從這里開始運行

2.捕捉圖形處理器幀

Unity游戲調(diào)試。目前沒有研究

3.調(diào)試器命令

相當(dāng)于直接在LLDB上使用命令

4.日志消息

執(zhí)行斷點時，hello信息將直接打印在LLDB列中

5.外殼命令

如圖:

當(dāng)斷點被執(zhí)行時，計算機(jī)將讀取Hello world

6.聲音

選擇對應(yīng)的聲音，遇到斷點就發(fā)出對應(yīng)的聲音，也很有意思。

一些LLDB和控制臺插件，加上插件和腳本開發(fā)，會大大提高開發(fā)效率。

只需設(shè)置一個斷點:

命令行輸入:(lldb)幫助

快速查詢所有命令列表

命令命令作用描述apropos-- List debugger commands related to a word or subject.(列出與某個單詞或主題相關(guān)的調(diào)試器命令。)breakpoint-- Commands for operating on breakpoints (see 'help b' for shorthand.)(斷點的相關(guān)操作，詳細(xì)看下面)bugreport-- Commands for creating domain-specific bug reports.(創(chuàng)建某個特點作用域的bug 命令)command-- Commands for managing custom LLDB commands.disassemble-- Disassemble specified instructions in the current target. Defaults to the current function for the current thread and stack frame.expression-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.(直接改變其值,點擊繼續(xù)運行)frame-- Commands for selecting and examing the current thread's stack frames.(通過命令來檢查當(dāng)前堆棧的相關(guān)信息。結(jié)合后面的命令參數(shù))gdb-remote-- Connect to a process via remote GDB server. If no host is specifed, localhost is assumed.gui-- Switch into the curses based GUI mode.help-- Show a list of all debugger commands, or give details about a specific command.kdp-remote-- Connect to a process via remote KDP server. If no UDP port is specified, port 41139 is assumed.language-- Commands specific to a source language.log-- Commands controlling LLDB internal logging.memory-- Commands for operating on memory in the current target process.platform-- Commands to manage and create platforms.plugin-- Commands for managing LLDB plugins.process-- Commands for interacting with processes on the current platform.(配合其包含的命令繼續(xù)執(zhí)行 執(zhí)行 process help即可看到)quit-- Quit the LLDB debugger.register-- Commands to access registers for the current thread and stack frame.-- Invoke the interpreter with provided code and display any results. Start the interactive interpreter if no code is supplied.settings-- Commands for managing LLDB settings.source-- Commands for examining source code described by debug information for the current target process.target-- Commands for operating on debugger targets.thread-- Commands for operating on one or more threads in the current process.(在當(dāng)前進(jìn)程中操作一個或多個線程的命令,結(jié)合其下面的參數(shù)進(jìn)行。下面有其搭配參數(shù)詳細(xì)說明)type-- Commands for operating on the type system.version-- Show the LLDB debugger version.（查看開發(fā)語言的版本）watchpoint-- Commands for operating on watchpoints.add-dsym-- Add a debug symbol file to one of the target's current modules by specifying a path to a debug symbols file, or using the options to specify a module to download symbols for.attach-- Attach to process by ID or name.b-- Set a breakpoint using one of several shorthand formats.bt-- Show the current thread's call stack. Any numeric argument displays at most that many frames. The argument 'all' displays all threads.c-- Continue execution of all threads in the current process.call-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.continue-- Continue execution of all threads in the current process.detach-- Detach from the current target process.di-- Disassemble specified instructions in the current target. Defaults to the current function for the current thread and stack frame.dis-- Disassemble specified instructions in the current target. Defaults to the current function for the current thread and stack frame.display-- Evaluate an expression at every stop (see 'help target stop-hook'.)down-- Select a newer stack frame. Defaults to moving one frame, a numeric argument can specify an arbitrary number.env-- Shorthand for viewing and setting environment variables.exit-- Quit the LLDB debugger.f-- Select the current stack frame by index from within the current thread (see 'thread backtrace'.)file-- Create a target using the argument as the main executable.finish-- Finish executing the current stack frame and stop after returning. Defaults to current thread unless specified.image-- Commands for accessing information for one or more target modules.j-- Set the program counter to a new address.jump-- Set the program counter to a new address.kill-- Terminate the current target process.l-- List relevant source code using one of several shorthand formats.list-- List relevant source code using one of several shorthand formats.n-- Source level single step, stepping over calls. Defaults to current thread unless specified.(相當(dāng)于一行一行的執(zhí)行函數(shù))next-- Source level single step, stepping over calls. Defaults to current thread unless specified.（與 n的作用幾乎一致）nexti-- Instruction level single step, stepping over calls. Defaults to current thread unless specified.ni-- Instruction level single step, stepping over calls. Defaults to current thread unless specified.p-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.(可以打印程序中相關(guān)參數(shù)的值,其屬性狀態(tài))parray-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.（與 p相同）po-- Evaluate an expression on the current thread. Displays any returned value with formatting controlled by the type's author.(與 p的區(qū)別是打印的值所帶的參數(shù)相對簡潔一點)poarray-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.（與 p相同）print-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.（與 p相同）q-- Quit the LLDB debugger.r-- Launch the executable in the debugger.rbreak-- Sets a breakpoint or set of breakpoints in the executable.repl-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.reveal_load_dev-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.reveal_load_sim-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.reveal_start-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.reveal_stop-- Evaluate an expression on the current thread. Displays any returned value with LLDB's default formatting.run-- Launch the executable in the debugger.s-- Source level single step, stepping into calls. Defaults to current thread unless specified.(一步一步執(zhí)行，即使遇到函數(shù)也會進(jìn)入該函數(shù)一步一步執(zhí)行代碼)si-- Instruction level single step, stepping into calls. Defaults to current thread unless specified.sif-- Step through the current block, stopping if you step directly into a function whose name matches the TargetFunctionName.step-- Source level single step, stepping into calls. Defaults to current thread unless specified.stepi-- Instruction level single step, stepping into calls. Defaults to current thread unless specified.t-- Change the currently selected thread.tbreak-- Set a one-shot breakpoint using one of several shorthand formats.undisplay-- Stop displaying expression at every stop (specified by stop-hook index.)up-- Select an older stack frame. Defaults to moving one frame, a numeric argument can specify an arbitrary number.x-- Read from the memory of the current target process.