GDB is no longer hitting breakpoints in VS Code within docker container - docker

Question

Once I had set launch.json and I ran gdb and debugged in my code successfully until something happened and all breakpoint became "gray" with the such message:
"Module containing this breakpoint has not yet loaded or the breakpoint address could not be obtained."
However, debugger attaches to running program and I even can make steps from main, but still breakpoint are not hit... This is C++ project that is built with cmake with gcc with -DCMAKE_BUILD_TYPE=DEBUG flag.
launch.json is this:
{
// 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": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "./MyProject/project",
"args": [],
"stopAtEntry": false,
"cwd": "/home/AA/workspace",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"miDebuggerServerAddress": "/*Cannot write here, but it's fine*/",
"sourceFileMap": {/*Cannot write here, but it*/}
},
]
}
How do I fix this problem?

Answer 1

I was looking for an answer in other resources and the most solutions say that you should -g option if you compiler a project with gcc. It wasn't my case because I use cmake but I had one detail that I debugged code that was run in docker.
When you work with files in VS code from your user and docker runs project from another user, you should add the option "sourceFileMap": {} in launch.json:
"sourceFileMap": {
"/home/user/project/file.hpp" : "/home/YourNameBeyondDocker/project/file.hpp",
...
I added wrong path in this option. When I took it out, my debugger finally started hitting breakpoints!