LLDB: List source code

Question

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

How can I get the same in lldb?

I am

Answer 1

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

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"))

With these cases, you will get behavior like this:

Show current frame:

(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   }

show previous ten lines:

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

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.

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.