Debugger is waiting a preLaunchTask (QEMU in waiting mode)

[AIG-Livny]

I saw this #6209 but it does not work for me, because QEMU doesn't write anything in console.

Debugger is waiting for the process to complete. Obviously, this process must be performed during debugging.
I am trying to run my program for ARM in QEMU:
launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Debug program",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}\\test.elf",
            "miDebuggerServerAddress": "localhost:9000",
            "stopAtEntry": true,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "miDebuggerPath": "D:\\gcc_arm\\bin\\arm-none-eabi-gdb.exe",
            "preLaunchTask": "Build and run",
        }
    ]
}

tasks.json:

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Build",
            "type": "shell",
            "command": "make",
            "group": {
                "kind": "build",
                "isDefault": true
            }
        },
        {
            "label": "Run QEMU",
            "type": "shell",
            "isBackground": true,
            "command": "qemu-system-arm -S -gdb tcp::9000 -M lm3s811evb -kernel test.elf -nographic",
        },
        {
            "label": "Build and run",
            "dependsOrder":"sequence",
            "dependsOn": [
                "Build",
                "Run QEMU",
            ]
        }
    ]
}

As you can see, I run QEMU with the -S key. This forces QEMU to wait for the Debugger.
The console is empty at this time.
Everything works great if I run QEMU manually.
Maybe there is some kind of function to start Debug without waiting for completion?
Or do I need to get QEMU to write something in console?
Is it possible to add such a function in VSCode?

[AIG-Livny]

Hmm. This works:
tasks.json:

{
            "label": "Run QEMU",
            "type": "shell",
            "isBackground": true,
            "command": "echo Starting QEMU&qemu-system-arm -S -gdb tcp::9000 -M lm3s811evb -kernel test.elf -nographic",
            "problemMatcher": {
                "pattern": {
                    "regexp": "^(Starting QEMU)",
                    "line": 1,
                },
                "background": {
                    "activeOnStart": true,
                    "beginsPattern": "^(Starting QEMU)",
                    "endsPattern": "^(Starting QEMU)"
                }
            }
        },

launch.json:
"preLaunchTask": "Run QEMU",

But, this does not work:
tasks.json:

{
            "label": "Build",
            "type": "shell",
            "command": "make",
            "group": {
                "kind": "build",
                "isDefault": true
            },
        },
{
            "label": "Run QEMU",
            "type": "shell",
            "isBackground": true,
            "command": "echo Starting QEMU&qemu-system-arm -S -gdb tcp::9000 -M lm3s811evb -kernel test.elf -nographic",
            "problemMatcher": {
                "pattern": {
                    "regexp": "^(Starting QEMU)",
                    "line": 1,
                },
                "background": {
                    "activeOnStart": true,
                    "beginsPattern": "^(Starting QEMU)",
                    "endsPattern": "^(Starting QEMU)"
                }
            }
            
        },
{
            "label": "Build and run",
            "dependsOrder":"sequence",
            "dependsOn": [
                "Build",
                "Run QEMU",
            ]
        }

launch.json:
"preLaunchTask": "Build and run",

Oh...

[AIG-Livny]

Ok, now it works as i wanted...
"command": "make&echo Starting QEMU&qemu-system-arm -S -gdb tcp::9000 -M lm3s811evb -kernel test.elf -nographic",

[isidorn]

This is probably due to the taskService not sending correct events after a tusk has finished. Forward to @alexr00 as she might want to potentially investigate this. Thanks

[alexr00]

Currently, having background tasks in a a 'dependsOn` is not supported. Duplicate of #70283

[vscodebot]

Thanks for creating this issue! We figured it's covering the same as another one we already have. Thus, we closed this one as a duplicate. You can search for existing issues here. See also our issue reporting guidelines.

Happy Coding!