bug#56495: 29.0.50; Support for debugging Emacs with LLDB

[Gerd Möllmann]

On 2022-07-11,, at 11:18 , Robert Pluim <rpluim@gmail.com> wrote:

On Mon, 11 Jul 2022 10:13:35 +0200, Gerd Möllmann <gerd.moellmann@gmail.com> said:

Iʼve got:
   lldb -v
   lldb-1300.0.42.3
   Swift version 5.5.2-dev

Thanks.

Looks like Apple's LLDB from the Xcode command-line tools.  

Mine says "lldb version 14.0.6", and comes from "brew install llvm".  (Which I need for 'llvm-vscode', which I need for 'dap-mode', which I need for debugging with LLDB inside of Emacs, which is because of <known long story here>, and <another, shorter story here>).

I need '--overwrite' because it allows me to reload the code in a running LLDB.  Apple's LLDB seems to '--overwrite' by default, while mine gives an error:

  cannot add command: user command exists and force replace not set

\o/

Maybe I can somehow pythonese if '--overwrite' is supported or not.

(this is an Intel macbook, not an M1)

Iʼm getting this:

   lldb emacs
   error: unknown or ambiguous option
   error: unknown or ambiguous option
   Emacs debugging support has been installed.
   (lldb) target create "emacs"
   Current executable set to ʼ/Users/rpluim/repos/emacs/src/emacsʼ
   (x86_64).

which I can fix by doing this:

diff --git a/etc/emacs_lldb.py b/etc/emacs_lldb.py
index 3a9f17e020..ebf14d44c2 100644
--- a/etc/emacs_lldb.py
+++ b/etc/emacs_lldb.py
@@ -144,7 +144,6 @@ def define_command (debugger, function):
    lldb_command = function.__name__
         python_function = __name__ + "." + function.__name__
              debugger.HandleCommand(f"command script add "
-                           f"--overwrite "
                           f"--function {python_function} "
                           f"{lldb_command}")

Robert
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