Debugging with Bazel in Visual Studio Code with Ubuntu - visual-studio-code

Question

I read this Bazel VS Code tutorial.
Currently, I have a problem with reproducing the tutorial on my system.
I am using Ubuntu 18.04 and bazel 0.27.0 and Visual Studio Code (Version 1.35.1)
My files:
tasks.json:
{
"version": "2.0.0",
"tasks": [
{
"label": "Build Example (Debug)",
"type": "shell",
"command": "bazel build :example -c dbg",
"linux": {
"command": "bazel build :example -c dbg --spawn_strategy=standalone",
},
"group": {
"kind": "build",
"isDefault": true
},
}
]
}
My launch.json:
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "Example",
"type": "cppdbg",
"request": "launch",
"preLaunchTask": "Build Example (Debug)",
"program": "${workspaceFolder}/bazel-out/k8-dbg/bin/example",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}/bazel-out/k8-dbg/bin/example.runfiles/__main__/",
"environment": [],
"externalConsole": true,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"sourceFileMap": {
"/home/newton/.cache/bazel/_bazel_newton/7a12d285425fc99da0ce87e2a08f2f36/execroot/__main__/": "${workspaceFolder}"
}
}
]
}
The following screenshot shows in the lower left corner that an error is reported when I try to start debugging: "Unable to read file (Error: File not found..."
I am looking for any suggestion on how to fix this and to make it work.

Answer 1

See this.
Here's my config:
tasks.json
{
// See https://go.microsoft.com/fwlink/?LinkId=733558
// for the documentation about the tasks.json format
"version": "2.0.0",
"tasks": [
{
"label": "build",
"type": "shell",
"command": "bazel build --compilation_mode=dbg //...",
"group": {
"kind": "build",
"isDefault": true
},
}
]
}
launch.json
{
"version": "0.2.0",
"configurations": [
{
"name": "ExampleMihai",
"preLaunchTask": "build",
"type": "cppdbg",
"request": "launch",
"program": "/home/mihai/.cache/bazel/_bazel_mihai/89c1625b12241e64b746e0e58fdc7159/execroot/__main__/bazel-out/k8-dbg/bin/unit/test_static_string",
"args": [],
"stopAtEntry": false,
"cwd": "/home/mihai/git/containers",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": false
}
]
},
]
}

Answer 2

I use sourceFileMap to fix the "unable to read file" error on Linux. The following configuration uses the "official" paths in bazel-bin/:
{
"version": "0.2.0",
"configurations": [
{
"name": "launch",
"type": "cppdbg",
"preLaunchTask": "build",
"request": "launch",
"program": "${workspaceFolder}/bazel-bin/example/example",
"cwd": "${workspaceFolder}/bazel-bin/example/example.runfiles/__main__",
"linux": {
"sourceFileMap": {
"/proc/self/cwd": "${workspaceFolder}",
}
}
}
]
}