LLDB：列出源代码 [英] LLDB: List source code

问题描述

我最常用的 gdb 命令是 l ，后跟 n ，后跟 l-。

My single most used gdb command is l followed by n followed by l -.

如何在lldb中获得相同的内容？

How can I get the same in lldb?

我对感到不满意，不得不输入一些行号只是为了在某处查看代码。在将大量变量转储到终端后，我想查看代码中的位置。我以前使用 l-回去看看我在哪里，因为随后对 l 的调用将滚动令我失望（lldb也这样做，但是关键是不响应 l-）。

I am not satisfied with having to type some line number just to see the code somewhere. I want to see where I am in the code, after dumping a ton of variables out to the terminal. And I used to use l - to go back to look at where I am, since subsequent calls to l will scroll me down (lldb also does this, but crucially does not respond to l -).

也许我很想念我可以放入某种模式，它将始终在单独的缓冲区 中显示相应的源位置。那样很好，但是我什至没有要求。

Perhaps I am missing something and there is some sort of "mode" i can put it in, which will show the corresponding source location in a separate buffer all the time. That would be nice, but I'm not even asking for that.

推荐答案

在Xcode 4.6中，lldb的 l 别名是源列表的简单快捷方式。

In Xcode 4.6, lldb's l alias is a simple shortcut for source list.

树源，已对其进行了改进，使其行为更像gdb。如果您在 http：上查看 source / Interpreter / CommandInterpreter.cpp //lldb.llvm.org/ 您会看到 l 现在是正则表达式命令的别名，在以下情况下：

In the top of tree sources, this has been improved to behave more like gdb. If you look at source/Interpreter/CommandInterpreter.cpp over at http://lldb.llvm.org/ you'll see that l is now a regular expression command alias with these cases:

if (list_regex_cmd_ap->AddRegexCommand("^([0-9]+)[[:space:]]*$", "source list --line %1") &&
    list_regex_cmd_ap->AddRegexCommand("^(.*[^[:space:]])[[:space:]]*:[[:space:]]*([[:digit:]]+)[[:space:]]*$", "source list --file '%1' --line %2") &&
    list_regex_cmd_ap->AddRegexCommand("^\\*?(0x[[:xdigit:]]+)[[:space:]]*$", "source list --address %1") &&
    list_regex_cmd_ap->AddRegexCommand("^-[[:space:]]*$", "source list --reverse") &&
    list_regex_cmd_ap->AddRegexCommand("^-([[:digit:]]+)[[:space:]]*$", "source list --reverse --count %1") &&
    list_regex_cmd_ap->AddRegexCommand("^(.+)$", "source list --name \"%1\"") &&
    list_regex_cmd_ap->AddRegexCommand("^$", "source list"))

情况下，您将获得以下行为：

With these cases, you will get behavior like this:

显示当前帧：

(lldb) f
#0: 0x0000000100000f2b a.out`main + 27 at a.c:15
   12   
   13   
   14   
-> 15       puts ("hi"); // line 15
   16   
   17       puts ("hi"); // line 17
   18   }

显示前十行：

(lldb) l -
   5    
   6    
   7    
   8    
   9        puts ("hi"); // line 9
   10   
   11   

您也可以使用停止行后计数和停止行前计数设置来控制在框架中显示多少源上下文

You can also use the stop-line-count-after and stop-line-count-before settings to control how much source context is displayed at frame stops.

请注意，您可以在〜/ .lldbinit 文件中创建自己的正则表达式命令别名，与树顶端lldb的 l 行为相同。有关语法和示例，请参见 help命令正则表达式。

Note that you can create your own regular expression command alias in your ~/.lldbinit file with the same behavior as the top-of-tree lldb's l. See help command regex for the syntax and an example.

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