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lldb cheat sheet. Execution Commands start lld (prefix with xcrun on os x). >lldb [ ]. >lldb — arg1 load program. >file LLDB Cheat Sheet. A complete gdb to lldb command map. Print out. Print object. (lldb) po responseObject (lldb) po [responseObject [email protected]”state”]. LLDB Debugger commands. GitHub Gist: instantly share code, notes, and snippets.

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A location gets resolved when the file address it corresponds to gets loaded into the program you are debugging.

When attaching to a process by name, lldb also supports the ” –waitfor ” option which waits for the next process that has that name to show up, and attaches to it. You can actually just get the summary of where this code is with the –summary option instead:.

Fortunately, if you don’t commandz one of our aliases, you an easily get rid of it by running for example:.

This will dump every single Objective-C class available to the SpringBoard process. This command will run the thread in the current frame till it reaches line in this frame or stops if it leaves the current frame. This command takes raw input, evaluated as an expression returning an unsigned integer pointing to the start of commancs region, after the ‘–‘ option terminator.

This will break on any C functions named main. Similarly, a file and line breakpoint might result in multiple locations if that file and line were inlined in different places in your code. Dump all sections from the main executable and any shared libraries.


Thank you for providing feedback! Note that any command can inline a scalar expression result as long as the target cpmmands stopped using backticks around any expression:.

LLDB to GDB Command Map

Show mixed source and disassembly for the current function for the current frame. You can use the help command to get an overview of which commands are available or to obtain details about specific commands. Set a breakpoint by a regular expression on a function name. Disassemble the current source line for the current frame. LLDB tries to use the same format characters as printf 3 when possible. This mode will allow us to run all threads and only stop the threads that are at breakpoints or have exceptions or signals.

The question of disabling stdio when running brings up a good opportunity to show how to set debugger properties in general. One other thing to note for gdb users is that lldb acts like gdb with: The “help” output for a command will tell you if it is “raw” or not, so you know what to expect.

LLDB Quick Start Guide

The primitive commands for process control all exist under the “thread” command: Options can be placed anywhere on the command line, but if the arguments begin with a ” – ” then you have to tell lldb that you’re done with options for the current command by adding an option termination: So when you make the breakpoint you would do:.


To set the same file and line breakpoint in LLDB you can enter either of:. This one is a bit messy at present. Attach to a remote gdb protocol server running on the local system, port Call a function to stop at a breakpoint in the function. By default, lldb does defined aliases to all common gdb process control commands ” s “, ” step “, ” n “, ” next “, ” finish “. The array brackets can be used on pointers to treat pointers as arrays:.

We have added a few aliases for commonly used commands e. So you don’t have to quote your whole expression, nor backslash protect quotes, etc Coommands get a backtrace for that thread, do:. This makes it easy to use configured names to experiment with your options.

I often kldb to see how developers have created something while in production. This allows you to set a breakpoint, etc without having to explicitly interrupt the program you are debugging:. Also the logical breakpoints remain live so that if another commnds library were to be loaded that had another implementation of the ” alignLeftEdges: Just like gdb, the lldb command interpreter does a shortest unique string match on command names, so the following two commands will both execute the same command:.