dlv --continue does not work in docker

[lukatendai]

I am running my program in a docker container:

/bin/dlv --headless=true --continue --accept-multiclient --listen=:5432 --api-version=2 exec test -- api-server -a 0.0.0.0:8883 --v 5 --log os:///stderr -w TRUE

When I use vscode and try to debug, nothing happens. However, when I remove option --continue, I can successfully debug

1. What version of Delve are you using (dlv version)? Version: 1.23.1
2. What version of Go are you using? (go version)? go version go1.23.3 darwin/arm64
3. What operating system and processor architecture are you using? MacOS M3
4. What did you do? Trying to debug
5. What did you expect to see? Process starts and I can stop at. breakpoint
6. What did you see instead? process starts and never stops at the breakpoint

[aarzilli]

What do the logs say? You say "process starts and never stops at the breakpoint" but what breakpoint should it stop at? You didn't set any.

[lukatendai]

2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc serving JSON-RPC on new connection 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc <- RPCServer.GetVersion(api.GetVersionIn{}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc -> *api.GetVersionOut{"DelveVersion":"Version: 1.23.1\nBuild: $Id: 2eba762d75437d380e48fc42213853f13aa2904d $","APIVersion":2,"Backend":"native","TargetGoVersion":"","MinSupportedVersionOfGo":"1.21.0","MaxSupportedVersionOfGo":"1.23.0"} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 2) <- RPCServer.State(rpc2.StateIn{"NonBlocking":true}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 2) -> rpc2.StateOut{"State":{"Pid":0,"TargetCommandLine":"","Running":true,"Recording":false,"CoreDumping":false,"Threads":null,"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 3) <- RPCServer.State(rpc2.StateIn{"NonBlocking":true}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 3) -> rpc2.StateOut{"State":{"Pid":0,"TargetCommandLine":"","Running":true,"Recording":false,"CoreDumping":false,"Threads":null,"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 4) <- RPCServer.State(rpc2.StateIn{"NonBlocking":true}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 4) -> rpc2.StateOut{"State":{"Pid":0,"TargetCommandLine":"","Running":true,"Recording":false,"CoreDumping":false,"Threads":null,"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 5) <- RPCServer.State(rpc2.StateIn{"NonBlocking":true}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 5) -> rpc2.StateOut{"State":{"Pid":0,"TargetCommandLine":"","Running":true,"Recording":false,"CoreDumping":false,"Threads":null,"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 6) <- RPCServer.Command(api.DebuggerCommand{"name":"halt","ReturnInfoLoadConfig":null}) 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 15) -> rpc2.CommandOut{"State":{"Pid":13,"TargetCommandLine":"/bg/fs/bin/gobg api-server -a 0.0.0.0:8883 --v 5 --log os:///stderr -w TRUE","Running":false,"Recording":false,"CoreDumping":false,"currentThread":{"id":13,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},"Threads":[{"id":25,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":27,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":28,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":29,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":30,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":34,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":13,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":23,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":24,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":26,"pc":616928,"file":"/usr/local/go/src/internal/runtime/syscall/asm_linux_arm64.s","line":17,"function":{"name":"internal/runtime/syscall.Syscall6","value":616896,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":31,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false},{"id":32,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":54,"ReturnValues":null,"CallReturn":false},{"id":33,"pc":591052,"file":"/usr/local/go/src/runtime/sys_linux_arm64.s","line":651,"function":{"name":"runtime.futex","value":591024,"type":0,"goType":0,"optimized":true},"goroutineID":0,"ReturnValues":null,"CallReturn":false}],"NextInProgress":false,"WatchOutOfScope":null,"exited":false,"exitStatus":0,"When":""}} error: "" 2024-12-05 14:06:13 2024-12-05T19:06:13Z debug layer=rpc (async 17) <- RPCServer.Command(api.DebuggerCommand{"name":"continue","ReturnInfoLoadConfig":null})

[lukatendai]

This is a log from my docker after I started debugging, after that nothing happens. When I try to pause, it does nothing, no logs at all

[aarzilli]

Please describe what you did to get that log and why you would expect something to happen.

[lukatendai]

1. I have a docker compose setup to run following command: /bin/dlv --headless=true --continue --accept-multiclient --listen=:5432 --api-version=2 exec test -- api-server -a 0.0.0.0:8883 --v 5 --log os:///stderr -w TRUE\
2. I start docker, i can see that mine container is running
3. I go to VSCode and I run a debugger which connects to the port exported by the container
4. The debugger shows the debugger toolbar with "pause", "refresh" and "disconnect" buttons.
5. When I click "pause" I expect that my program that runs in the container to stop and to see the call stack, Instead nothing happens.

Here is the thing, when I remove "--continue" from the docker command, the program stops and waits for the debugger to connect, and then when I click "pause" the program stops and I see the call stack.

[aarzilli]

This might simply be the legacy mode of the debug adapter not supporting --continue, try switching to dlv-dap: https://github.com/golang/vscode-go/wiki/debugging#connect-to-headless-delve-with-target-specified-at-server-start-up