Breakpoints on Windows not set correctly

[jshbrntt]

OS: Windows 11 Version 23H2 (OS Build 22631.4037)
VSCode version: 1.92.2 (user setup)
CodeLLDB version: 1.10.1
Compiler: Ubuntu clang version 16.0.0 (1~exp5ubuntu3)
Debuggee: x86_64-windows-msvc

My launch.json is as follows.

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "lldb",
            "request": "launch",
            "name": "Debug: Racer (Windows)",
            "program": "${workspaceFolder}/build/windows/debug/racer.exe",
            "args": [],
            "cwd": "${workspaceFolder}/build/windows/debug",
            "sourceMap": {
                "/home/ubuntu/racer": "${workspaceFolder}"
            }
        }
    ]
}

The value of ${workspaceFolder} is as follows, logged using the following task from my tasks.json file.

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "Print value of workspaceFolder",
            "command": "echo",
            "args": [
              "${env:USERNAME}",
              "workspaceFolder = ${workspaceFolder}"
            ],
            "type": "shell"
        }
    ]
}

Output (of above task)

 *  Executing task: echo Josh 'workspaceFolder = C:\Users\Josh\racer' 

Josh
workspaceFolder = C:\Users\Josh\racer
 *  Terminal will be reused by tasks, press any key to close it.

Therefore sourceMap in my launch.json should be the following.

"sourceMap": {
    "/home/ubuntu/racer": "C:\\Users\\Josh\\racer"
}

However, when I add a breakpoint in the editor I get the following output in the Debug Console.

Console is in 'commands' mode, prefix expressions with '?'.
Launching: C:\Users\Josh\racer\build\windows\debug\racer.exe
Launched process 239076
settings show target.source-map
target.source-map (path-map) =
[0] "\home\ubuntu\racer" -> "C:\Users\Josh\racer"

Could not resolve any locations for breakpoint at c:\Users\Josh\racer\src\racer\main.cpp:78, but found a valid location at \home\ubuntu\racer\src\racer\main.cpp:78

You can see the casing of the drive letter is not correct and does not match was was supplied in sourceMap.

c:\Users\Josh\racer\src\racer\main.cpp:78

If I set the breakpoint manually via the debug console with the path correctly cased, it resolves correctly.

breakpoint set --file C:\Users\Josh\racer\src\racer\main.cpp --line 78
Breakpoint 4: where = racer.exe`SDL_main + 1114 at main.cpp:78, address = 0x00007ff66579e25a
b
Current breakpoints:
1: Exception breakpoint (catch: off throw: on) using: names = {'__cxa_throw', '__cxa_rethrow'}

  Names:
    cpp_exception


2: file = 'c:\Users\Josh\racer\src\racer\main.cpp', line = 78, exact_match = 0, locations = 0 (pending)


4: file = '\home\ubuntu\racer\src\racer\main.cpp', line = 78, exact_match = 0, locations = 1, resolved = 1, hit count = 1
  4.1: where = racer.exe`SDL_main + 1114 at main.cpp:78, address = 0x00007ff66579e25a, resolved, hit count = 1 

Workaround

Hardcode my sourceMap to the incorrectly cased path in my launch.json.

{
    "version": "0.2.0",
    "configurations": [
        {
            "type": "lldb",
            "request": "launch",
            "name": "Debug: Racer (Windows)",
            "program": "${workspaceFolder}/build/windows/debug/racer.exe",
            "args": [],
            "cwd": "${workspaceFolder}/build/windows/debug",
            "sourceMap": {
                "/home/ubuntu/racer": "c:\\Users\\Josh\\racer"
            }
        }
    ]
}

[jshbrntt]

It appears rust-analyzer had a similar problem caused by VSCode sending file paths with lowercased drive letters.

They fixed the issue by forcing them to be uppercase here.

https://github.com/rust-lang/rust-analyzer/pull/14689/files