Debug error "Unable to '...': File not Found"

[DemoCrazer]

• Windows 10
• VS Code version 1.20.0
• C/C++ extension version 0.14.6
• Other extensions: C++ Intellisense

I tried to debug C++ file with gdb, but following error message is appeared.

Unable to 'main.cpp': File not found (file:///c/Users/.../main.cpp)

But I set the program path in launch.json file like this:

"program": "C:/Users/.../main.exe"

I think it's because VS Code recognizes C: to c, but I couldn't find any solutions to fix this issue.
How can I set target program's path correctly?

This is my tasks.json file:

{
    "version": "2.0.0",
    "runner": "terminal",
    "type": "shell",
    "echoCommand": true,
    "presentation": { "reveal": "always" },
    "tasks": [
        {
            "label": "Save & Compile C++",
            "command": "g++",
            "args": [
                "${file}",
                "-g", "-o",
                "${fileDirname}/${fileBasenameNoExtension}"
            ],
            "group": "build",

            "problemMatcher": {
                "fileLocation": [
                    "relative",
                    "${workspaceRoot}"
                ],
                "pattern": {
                    "regexp": "^(.*):(\\d+):(\\d+):\\s+(warning error):\\s+(.*)$",
                    "file": 1,
                    "line": 2,
                    "column": 3,
                    "severity": 4,
                    "message": 5
                }
            }
        },

        {
            "label": "execute",
            "command": "cmd",
            "group": "test",
            "args": [
                "/C", "${fileDirname}\\${fileBasenameNoExtension}"
            ]
        }
    ]
}

[pieandcakes]

I think this is how it is compiled. You can try specifying "sourceFileMap" in your launch.json to have it map from upper to lowercase. I assume that error is a VS Code error that it can't find the file which is displayed as a drop down message at the top?

[DemoCrazer]

@pieandcakes How can I specify sourceFileMap?

[pieandcakes]

@Luberen The documentation is at the bottom of this article.

I think your format will be:

"sourceFileMap": {
     "c:\\": "C:\\"
}

[DemoCrazer]

Thank you for your answer.
I set sourceFileMap path like this:

"sourceFileMap": {
    "/c/": "C:/"
}

Now it works fine :)

[AchalaSB]

Im not getting output.. I just tried C++ hello world..
Im getting debug console
"You may only use the C/C++ Extension for Visual Studio Code with
Visual Studio Code, Visual Studio or Visual Studio for Mac software
to help you develop and test your applications."

I installed C/C++ extension. when I tried to debug using GDB it shows path error
please help me to solve this.

[Deshwal36]

Windows :

Please make sure if you have gdb.exe in your bin folder
C:\MinGW\bin\gdb.exe
if not then you can directly install the gdb.exe by following commands -
In command prompt browsed to C:\MinGW\bin and run : mingw-get.exe to install gdb

C:\MinGW\bin>mingw-get.exe install gdb

After that modify your path in three files in vs code

1. c_cpp_properties.json
   "compilerPath": "C:/MinGW/bin/g++.exe"
2. launch.json
   "miDebuggerPath": "C:/MinGW/bin/gdb.exe"
3. tasks.json
   "command": "C:/MinGW/bin/g++.exe"

This will resolve your compiling and debugging problem in windows.

[Fabxx]

I'm having the same problem, trying the solution mentioned above for the source file map, but i'm on Debian linux distro based. INstead of C:\ what should i put?

[sean-mcmanus]

@WardenGnaw Do you know?

[morfi11]

I am using remote-ssh with an ubunto server. trying to use gdb to view a coredump file.
Cannot get the thing to find my source file - keep getting the "file not found" popup. It always shows the filename with no path.

I have this in my launch.json: (just added the soureFileMap now to fix the absolute path - does not help)

    {
        "name": "View coredump",
        "type": "cppdbg",
        "request": "launch",
        "program": "${workspaceRoot}/build/app/myapp",
        "args": [],
        "cwd": "${workspaceRoot}",
        "coreDumpPath": "/tmp/lastcoredump.core",
        //"preLaunchTask": "select coredump",
        "MIMode": "gdb",
        "problemMatcher": {
            //"base" : "$gcc",
            "fileLocation" : "absolute",
            "sourceFileMap": {
                "\\mnt": "${workspaceRoot}",
                "/mnt" : "${workspaceRoot}"
            }
        }
    }

[ehsanakrami]

In my case, replacing ${fileDirname} , ${workspaceRoot} with ${workspaceFolder} resolved the issue.