stepin function error in WSL

[fengxiaohu]

Type: Debugger

Describe the bug

• OS and Version: WSL:Ubuntu-18.04 Windows10
• VS Code Version: 1.48.0 (user setup)
• C/C++ Extension Version: Version 0.30.0-insiders4: September 1, 2020
• Other extensions you installed (and if the issue persists after disabling them):
• A clear and concise description of what the bug is:
  I want to step into the function pthread_create.c of external library pthread.
  ERROR:
  Unable to open 'pthread_create.c': Unable to read file 'vscode-remote://wsl+ubuntu-18.04/build/glibc-OTsEL5/glibc-2.27/nptl/pthread_create.c' (Error: Unable to resolve non-existing file 'vscode-remote://wsl+ubuntu-18.04/build/glibc-OTsEL5/glibc-2.27/nptl/pthread_create.c').

To Reproduce
Please include a code sample and launch.json configuration.
Steps to reproduce the behavior:

1. create test file petersonAlgorithm.c
   2.Build
2. set breakpoints at pthread_create(&p1,NULL,func,(void*)0
3. Debug See error :
   Unable to open 'pthread_create.c': Unable to read file 'vscode-remote://wsl+ubuntu-18.04/build/glibc-OTsEL5/glibc-2.27/nptl/pthread_create.c' (Error: Unable to resolve non-existing file 'vscode-remote://wsl+ubuntu-18.04/build/glibc-OTsEL5/glibc-2.27/nptl/pthread_create.c').

Additional context
test file petersonAlgorithm.c Code:

#include <stdio.h> 
#include <pthread.h> 

  
int flag[2];
int turn;
const int MAX = 1e9;
int ans = 0;

void lock_init()
{
    flag[0] = flag[1]=0;
    turn = 0;
}
void lock(int self)
{
    flag[self] = 1;//lock
    turn = 1-self;// first give the other thread the chance to 
    // acquire lock 
    while(flag[1-self]==1 && turn == 1-self);// exit until 
    
}
void unlock(int self)
{
    flag[self] =0;
}
void* func(void *s)
{
    int i=0;
    int self = (int*)s;
    printf("thread Entered:%d\n",self);
    lock(self);
    
    for(i=0;i<MAX;i++)
    {
        ans++;
        unlock(self);
    }
}
int main()
{
    pthread_t p1,p2;
    lock_init();
    pthread_create(&p1,NULL,func,(void*)0); 
    pthread_create(&p2,NULL,func,(void*)1);
    pthread_join(p1,NULL);
    pthread_join(p2,NULL);
    printf("Actual Count: %d | Expected Count: %d\n", 
                                        ans, MAX*2); 
    return 0;
}

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": "(gdb) petersonAlgorithm ",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/petersonAlgorithm ",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": false,
            "MIMode": "gdb",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        }

    ]
}

task.json

{
	"version": "2.0.0",
	"tasks": [
		{
			"type": "shell",
			"label": "C/C++: gcc build active file",
			"command": "/usr/bin/gcc",
			"args": [
				"-g",
				"${file}",
				"-pthread",
				"-o",
				"${fileDirname}/${fileBasenameNoExtension}"
			],
			"options": {
				"cwd": "${workspaceFolder}"
			},
			"problemMatcher": [
				"$gcc"
			],
			"group": {
				"kind": "build",
				"isDefault": true
			}
		}
	]
}

console output

thread Entered:0
thread Entered:1
Actual Count: 1156311223 | Expected Count: 2000000000

[WardenGnaw]

Not an error. Message is trying to open pthread_create.c which is a library file. Unless you have the source file it will not step into that method.

Duplicate of: #811