[lldb] first secondary channel idea - query stack

[lanza]

So as a first idea of a feature that can be implemented via lldb's python API would be to query for the stack. You can do this either with a :NvimGdbQueryStack or as a persistent display on every single stop.

This could be don via something like (making up the APIs as I go as I don't know them all off the top of my head)

if is_x86_64():
    stack_pointer = "$rsp"
else:
    stack_pointer = "$sp"
output = lldb.HandleCommand(f"memory read -l 8 -c 64 {stack_pointer}")
process_stack_output(output)
vim.command("vert bo 30new | setlocal notemp | setlocal readonly")
w = vim.windows.getlast()
w.contents = output

What are your thoughts on this?

[sakhnik]

That's interesting. I was thinking about it in a little bit different way:

• The plugin should only provide a way to "define" a watch window
• The user could specify any debugger-, platform-specific expression
• The window would update itself upon events (either after parsing of debugger output for gdb and pdb, or from API events for lldb Two way socket communication with lldb #53)
• The plugin code probably doesn't need to be too much aware of platform-specific things like x64, arm whatnot.

Could we have a function GdbCreateWatchWindow("expr")?