vscode debugging on linux

1: (276) LaunchOptions<LocalLaunchOptions xmlns='schemas.microsoft.com/.../2014'
1: (294) LaunchOptions  ExePath='/home/f/Projects/area51/myapp/BUILD/myapp.elf'
1: (294) LaunchOptions  WorkingDirectory='/home/f/Projects/area51/myapp'
1: (294) LaunchOptions  ExeArguments=''
1: (294) LaunchOptions MIMode='gdb'
1: (294) LaunchOptions  MIDebuggerPath='/usr/bin/arm-none-eabi-gdb'
1: (294) LaunchOptions  WaitDynamicLibLoad='false'
1: (294) LaunchOptions  DebugServer='openocd'
1: (294) LaunchOptions  DebugServerArgs='-f board/nordic_nrf52_dk.cfg -c "init" '
1: (294) LaunchOptions  ServerStarted='GDB\ server\ started'
1: (294) LaunchOptions  FilterStderr='true'
1: (294) LaunchOptions  ServerLaunchTimeout='20000'
1: (294) LaunchOptions>
1: (294) LaunchOptions    <SetupCommands>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description='connect to target'>-target-select remote localhost:3333</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description='load file'>-file-exec-and-symbols /home/f/Projects/area51/myapp/BUILD/myapp.elf</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor endian little"</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor reset"</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor halt"</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor arm semihosting enable"</Command>
1: (294) LaunchOptions        <Command IgnoreFailures='false' Description='flash target'>-target-download</Command>
1: (294) LaunchOptions    </SetupCommands>
1: (294) LaunchOptions</LocalLaunchOptions>
1: (390) Starting: "openocd" -f board/nordic_nrf52_dk.cfg -c "init" 
1: (20406) <-logout
C disconnect: {"restart":false}

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "C++ Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceRoot}/BUILD/${workspaceRootFolderName}.elf",
            "args": [],
            "stopAtEntry": true,
            "cwd": "${workspaceRoot}",
            "environment": [],
            "externalConsole": false,
            "debugServerArgs": "",
            "serverLaunchTimeout": 20000,
            "filterStderr": true,
            "filterStdout": false,
            "serverStarted": "GDB\\ server\\ started",
            "preLaunchTask": "make",
            "setupCommands": [
                { "text": "-target-select remote localhost:3333", "description": "connect to target", "ignoreFailures": false },
                { "text": "-file-exec-and-symbols ${workspaceRoot}/BUILD/${workspaceRootFolderName}.elf", "description": "load file", "ignoreFailures": false},
                { "text": "-interpreter-exec console \"monitor endian little\"", "ignoreFailures": false },
                { "text": "-interpreter-exec console \"monitor reset\"", "ignoreFailures": false },
                { "text": "-interpreter-exec console \"monitor halt\"", "ignoreFailures": false },
                { "text": "-interpreter-exec console \"monitor arm semihosting enable\"", "ignoreFailures": false },
                { "text": "-target-download", "description": "flash target", "ignoreFailures": false }
            ],
            "logging": {
                "moduleLoad": true,
                "trace": true,
                "engineLogging": true,
                "programOutput": true,
                "exceptions": true
            },
            "linux": {
                "MIMode": "gdb",
                "MIDebuggerPath": "/usr/bin/arm-none-eabi-gdb",
                //"debugServerPath": "pyocd-gdbserver",
                //"debugServerArgs": " --port 3333 --target nrf52 --frequency 4000"
                
                "debugServerPath": "openocd",
                "debugServerArgs": "-f board/nordic_nrf52_dk.cfg -c \"init\" "
            }
        }
    ]
}

which always gives me the error that the debug server failed to launch, but..

"openocd" -f board/nordic_nrf52_dk.cfg -c "init"      
Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
	openocd.org/.../bugs.html
adapter speed: 10000 kHz
cortex_m reset_config sysresetreq
Info : No device selected, using first device.
Info : J-Trace Cortex-M Rev.3 compiled Nov 23 2017 16:43:50
Info : Hardware version: 3.10
Info : VTarget = 3.300 V
Info : clock speed 10000 kHz
Info : SWD DPIDR 0x2ba01477
Info : nrf52.cpu: hardware has 6 breakpoints, 4 watchpoints
// this is blocking input

works as expected (as far as I can tell).

What configuration is missing? What is the issue.

I am using a j-Trace from Segger.

The initial export was done with mbed export -i vscode_gcc_arm -m NRF52_DK --profile mbed-os/tools/profiles/debug.json

openocd yields 0.10.0

Open On-Chip Debugger 0.10.0
Licensed under GNU GPL v2
For bug reports, read
	openocd.org/.../bugs.html

I am not tied to openocd, but neither does the pyocd-gdbserver work:

1: (140) LaunchOptions<LocalLaunchOptions xmlns='schemas.microsoft.com/.../2014'
1: (148) LaunchOptions  ExePath='/home/f/Projects/area51/myapp/BUILD/myapp.elf'
1: (148) LaunchOptions  WorkingDirectory='/home/f/Projects/area51/myapp'
1: (148) LaunchOptions  ExeArguments=''
1: (148) LaunchOptions MIMode='gdb'
1: (148) LaunchOptions  MIDebuggerPath='/usr/bin/arm-none-eabi-gdb'
1: (148) LaunchOptions  WaitDynamicLibLoad='false'
1: (148) LaunchOptions  DebugServer='pyocd-gdbserver'
1: (148) LaunchOptions  DebugServerArgs=''
1: (148) LaunchOptions  ServerStarted='GDB\ server\ started'
1: (148) LaunchOptions  FilterStderr='true'
1: (148) LaunchOptions  ServerLaunchTimeout='20000'
1: (148) LaunchOptions>
1: (148) LaunchOptions    <SetupCommands>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description='connect to target'>-target-select remote localhost:3333</Command>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description='load file'>-file-exec-and-symbols /home/f/Projects/area51/myapp/BUILD/myapp.elf</Command>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor endian little"</Command>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor reset"</Command>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor halt"</Command>
1: (148) LaunchOptions        <Command IgnoreFailures='false' Description=''>-interpreter-exec console "monitor arm semihosting enable"</Command>
1: (149) LaunchOptions        <Command IgnoreFailures='false' Description='flash target'>-target-download</Command>
1: (149) LaunchOptions    </SetupCommands>
1: (149) LaunchOptions</LocalLaunchOptions>
1: (200) Starting: "pyocd-gdbserver" 
1: (20208) <-logout
C disconnect: {"restart":false}

pyocd-gdbserver --version yields 0.8.0

  • Please correct me if I'm wrong but AFAIK VSCode is not officially supported IDE for nRF SDK. So don't expect there's a solution. You may consider VSCode community a better place to look for information how to add such support. Having said that I've been working on such integration and I've ran into bugs in VSCode C/C++ extension that make debugging embedded ARM binaries impossible on Linux and Mac. Quick look at VSCCPP github issue tracker will show you that's commonly reported problem (just look for arm-gdb).