Passing arguments to DAP

[ranjithshegde]

I am trying to debug my cpp program that requires to be run on dGPU (for OpenCL). When I debug with gdb i would just call gdb with my dGPU render-offload prefix prime-run gdb myProgramBinary. When I execute run in gdb it runs as expected on dGPU

Is there a way to do this with nvim-dap? I am using vscode-cpptools with Gdb-MI.

What I have tried so far is pre-pending prime-run in cpp-tools adapter settings

dap.adapters.prime = {
-- stuff
command = "/usr/bin/prime-run " .. actualDAPCommand

which fails to launch. I have also tried prepending the prime-run in the configurations through program = function() "/usr/bin/prime-run " .. whateverBinaryFetchingMethod also with no luck.

Is there a way to declare this?

[mfussenegger]

Did you try using the miDebuggerPath and miDebuggerArgs options from vscode-cpptools launch.json reference?

The command within the adapter configuration needs to start the debug-adapter, not the debugger. As shown in the dap.txt help:

DAP-Client ----- Debug Adapter ------- Debugger ------ Debugee
(nvim-dap)  |   (per language)  |   (per language)    (your app)
            |                   |
            |        Implementation specific communication
            |        Debug-adapter and debugger could be the same process
            |
     Communication via debug adapter protocol

The debug adapter in your case is vscode-cpptools and the debugger is gdb.

dap.adapters defines how to start the debug adapter
dap.configurations defines how to start the debugee. Depending on the debug adapter, it can also influence how the debugger is started. Looks like this is possible with vscode-cpptools.

[ranjithshegde]

Thank you for the explaination of the process. I understand now. Playing around with miDebuggerPath did work for me.

Just for others looking to perpend/append commands to the debugger, I did it with a shell script

#!/bin/sh
MY_FLAGS myPreviousCommands path/to/debugger "$@"

then setting path to that script as miDebuggerPath