Linux: Debugger does not start after upgrading to 0.20

[s-martin]

Type: Debugger

Describe the bug

• OS and Version: CentOS 7.5
• VS Code Version: 1.28.2
• C/C++ Extension Version: 0.20.1
• Other extensions you installed (and if the issue persists after disabling them):

To Reproduce
Steps to reproduce the behavior:

1. Compile project (I use CMake and cmake-tools)
2. Click 'Launch Debugger'
3. Nothing happens
4. Debugging process is started, but won't be closed when closing VSCode

Additional context

• Debugging worked before 0.20.
• I use GCC 7 (with Software Collections devtoolset-7), other wise it would be GCC 4.8.5

ps aux after closing VSCode:

mts      13588  0.0  0.0 113172  1484 ?        S    11:16   0:00 bash /home/mts/.vscode/extensions/ms-vscode.cpptools-0.20.1/debugAdapters/OpenDebugAD7
mts      13598  0.3  0.6 784172 34832 ?        Sl   11:16   0:00 /home/mts/.vscode/extensions/ms-vscode.cpptools-0.20.1/debugAdapters/mono.linux-x86_64 --config /home/mts/.vscode/extensions/ms-vscode.cpptools-0.

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "MyApp Launch",
            "type": "cppdbg",
            "request": "launch",
            "targetArchitecture": "x64",
            "program": "${workspaceRoot}/Debug/bin/MyApp",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceRoot}",
            "environment": [],
            "externalConsole": true,
            "linux": {
                "MIMode": "gdb",
                "setupCommands": [
                    { "text": "-enable-pretty-printing", "description": "enable pretty printing", "ignoreFailures": true }  
                ]
            },
            "osx": {
                "MIMode": "lldb"
            },
            "windows": {
                "MIMode": "gdb",
                "miDebuggerPath": "C:\\MinGW\\bin\\gdb.exe",
                "setupCommands": [
                    { "text": "-enable-pretty-printing", "description": "enable pretty printing", "ignoreFailures": true }
                ]
            }
        },
        {
            "name": "MyApp Attach",
            "type": "cppdbg",
            "request": "attach",
            "program": "${workspaceRoot}/Debug/bin/MyApp ",
            "processId": "${command:pickProcess}",
            "linux": {
                "MIMode": "gdb",
                "setupCommands": [
                    { "text": "-enable-pretty-printing", "description": "enable pretty printing", "ignoreFailures": true }  
                ]
            },
            "osx": {
                "MIMode": "lldb"
            },
            "windows": {
                "MIMode": "gdb"
            }
        }
    ]
}

[pieandcakes]

Do you see the same behavior as in #2787 ?

[s-martin]

No really, because I don't get a reaction at all when starting the debugger.

Only reaction you see is the animated blue line moving.

[pieandcakes]

@s-martin can you enable traceResponse and engineLogging and see what is sent to VS Code to start the connection and if gdb starts?

[yesenarman]

I'm having a similar issue.

• OS and Version: Arch Linux
• VS Code Version: 1.28.2
• C/C++ Extension Version: 0.20.1

To Reproduce
I'm attaching a zip with a small sample project: debug.zip

• Compile the source with g++ -g main.cpp
• Click 'Launch Debugger'
• Nothing happens. I only see a blue progress bar looping indefinitely.

Additional context

• It seems that gdb doesn't start, I couldn't find anything matching gdb with htop.
• Debugging works in the same project when I downgrade the extension to 0.19.0

launch.json

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "(gdb) Launch",
            "type": "cppdbg",
            "request": "launch",
            "program": "a.out",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": true,
            "MIMode": "gdb",
            "logging": {
                "traceResponse": true,
                "engineLogging": true
            },
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        }
    ]
}

Debug Console with traceResponse and engineLogging enabled

--> E (output): {"event":"output","body":{"category":"console","output":"1: (203) LaunchOptions<LocalLaunchOptions xmlns='http://schemas.microsoft.com/vstudio/MDDDebuggerOptions/2014'\n"},"seq":2,"type":"event"}
1: (203) LaunchOptions<LocalLaunchOptions xmlns='http://schemas.microsoft.com/vstudio/MDDDebuggerOptions/2014'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (217) LaunchOptions  ExePath='a.out'\n"},"seq":4,"type":"event"}
1: (217) LaunchOptions  ExePath='a.out'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (217) LaunchOptions  WorkingDirectory='/home/arman/temp/debug'\n"},"seq":6,"type":"event"}
1: (217) LaunchOptions  WorkingDirectory='/home/arman/temp/debug'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (218) LaunchOptions  ExeArguments=''\n"},"seq":8,"type":"event"}
1: (218) LaunchOptions  ExeArguments=''
--> E (output): {"event":"output","body":{"category":"console","output":"1: (219) LaunchOptions  MIMode='gdb'\n"},"seq":10,"type":"event"}
1: (219) LaunchOptions  MIMode='gdb'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (220) LaunchOptions  MIDebuggerPath=''\n"},"seq":12,"type":"event"}
1: (220) LaunchOptions  MIDebuggerPath=''
--> E (output): {"event":"output","body":{"category":"console","output":"1: (220) LaunchOptions  WaitDynamicLibLoad='false'\n"},"seq":14,"type":"event"}
1: (220) LaunchOptions  WaitDynamicLibLoad='false'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (221) LaunchOptions  ExternalConsole='true'\n"},"seq":16,"type":"event"}
1: (221) LaunchOptions  ExternalConsole='true'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (221) LaunchOptions>\n"},"seq":18,"type":"event"}
1: (221) LaunchOptions>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (221) LaunchOptions    <SetupCommands>\n"},"seq":20,"type":"event"}
1: (221) LaunchOptions    <SetupCommands>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (222) LaunchOptions        <Command IgnoreFailures='true' Description='Enable pretty-printing for gdb'>-enable-pretty-printing</Command>\n"},"seq":22,"type":"event"}
1: (222) LaunchOptions        <Command IgnoreFailures='true' Description='Enable pretty-printing for gdb'>-enable-pretty-printing</Command>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (222) LaunchOptions    </SetupCommands>\n"},"seq":24,"type":"event"}
1: (222) LaunchOptions    </SetupCommands>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (223) LaunchOptions</LocalLaunchOptions>\n"},"seq":26,"type":"event"}
1: (223) LaunchOptions</LocalLaunchOptions>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (423) DbgCmd:echo $$ > /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 ; cd /home/arman ; DbgTerm=`tty` ; set -o monitor ; trap 'rm /tmp/Microsoft-MIEngine-In-m2ew1sej.w5t /tmp/Microsoft-MIEngine-Out-4oxua2j5.2m8 /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 /tmp/Microsoft-MIEngine-Cmd-o7oubq09.0x0' EXIT ; /usr/bin/gdb --interpreter=mi --tty=$DbgTerm < /tmp/Microsoft-MIEngine-In-m2ew1sej.w5t > /tmp/Microsoft-MIEngine-Out-4oxua2j5.2m8 & clear; pid=$! ; echo $pid > /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 ; wait $pid; \n"},"seq":28,"type":"event"}
1: (423) DbgCmd:echo $$ > /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 ; cd /home/arman ; DbgTerm=`tty` ; set -o monitor ; trap 'rm /tmp/Microsoft-MIEngine-In-m2ew1sej.w5t /tmp/Microsoft-MIEngine-Out-4oxua2j5.2m8 /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 /tmp/Microsoft-MIEngine-Cmd-o7oubq09.0x0' EXIT ; /usr/bin/gdb --interpreter=mi --tty=$DbgTerm < /tmp/Microsoft-MIEngine-In-m2ew1sej.w5t > /tmp/Microsoft-MIEngine-Out-4oxua2j5.2m8 & clear; pid=$! ; echo $pid > /tmp/Microsoft-MIEngine-Pid-1hghcoqj.8j0 ; wait $pid; 
--> C (runInTerminal-30): {"command":"runInTerminal","arguments":{"kind":"external","title":"cppdbg: a.out","cwd":"","args":["sh","/tmp/Microsoft-MIEngine-Cmd-o7oubq09.0x0"],"env":{}},"seq":30,"type":"request"}
--> E (output): {"event":"output","body":{"category":"console","output":"1: (443) Wait for connection completion.\n"},"seq":32,"type":"event"}
1: (443) Wait for connection completion.

[s-martin]

Sorry for the weekend delay, but here's also my debug console.

as @yesenarman said, I also don't see any gdb processes, just the cpptools debug adapter.

--> E (output): {"event":"output","body":{"category":"console","output":"1: (398) LaunchOptions<LocalLaunchOptions xmlns='http://schemas.microsoft.com/vstudio/MDDDebuggerOptions/2014'\n"},"seq":2,"type":"event"}
1: (398) LaunchOptions<LocalLaunchOptions xmlns='http://schemas.microsoft.com/vstudio/MDDDebuggerOptions/2014'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (424) LaunchOptions  ExePath='/home/myuser/myproj/Debug/bin/MyApp'\n"},"seq":4,"type":"event"}
1: (424) LaunchOptions  ExePath='/home/myuser/myproj/Debug/bin/MyApp'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (425) LaunchOptions  WorkingDirectory='/home/myuser/myproj'\n"},"seq":6,"type":"event"}
1: (425) LaunchOptions  WorkingDirectory='/home/myuser/myproj'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (425) LaunchOptions  TargetArchitecture='x64'\n"},"seq":8,"type":"event"}
1: (425) LaunchOptions  TargetArchitecture='x64'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (425) LaunchOptions  ExeArguments=''\n"},"seq":10,"type":"event"}
1: (425) LaunchOptions  ExeArguments=''
--> E (output): {"event":"output","body":{"category":"console","output":"1: (426) LaunchOptions  MIMode='gdb'\n"},"seq":12,"type":"event"}
1: (426) LaunchOptions  MIMode='gdb'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (426) LaunchOptions  MIDebuggerPath=''\n"},"seq":14,"type":"event"}
1: (426) LaunchOptions  MIDebuggerPath=''
--> E (output): {"event":"output","body":{"category":"console","output":"1: (426) LaunchOptions  WaitDynamicLibLoad='false'\n"},"seq":16,"type":"event"}
1: (426) LaunchOptions  WaitDynamicLibLoad='false'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (426) LaunchOptions  ExternalConsole='true'\n"},"seq":18,"type":"event"}
1: (426) LaunchOptions  ExternalConsole='true'
--> E (output): {"event":"output","body":{"category":"console","output":"1: (427) LaunchOptions>\n"},"seq":20,"type":"event"}
1: (427) LaunchOptions>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (427) LaunchOptions    <SetupCommands>\n"},"seq":22,"type":"event"}
1: (427) LaunchOptions    <SetupCommands>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (427) LaunchOptions        <Command IgnoreFailures='true' Description='enable pretty printing'>-enable-pretty-printing</Command>\n"},"seq":24,"type":"event"}
1: (427) LaunchOptions        <Command IgnoreFailures='true' Description='enable pretty printing'>-enable-pretty-printing</Command>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (427) LaunchOptions    </SetupCommands>\n"},"seq":26,"type":"event"}
1: (427) LaunchOptions    </SetupCommands>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (428) LaunchOptions</LocalLaunchOptions>\n"},"seq":28,"type":"event"}
1: (428) LaunchOptions</LocalLaunchOptions>
--> E (output): {"event":"output","body":{"category":"console","output":"1: (677) DbgCmd:echo $$ > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; cd /home/myuser/myproj/Debug/bin ; DbgTerm=`tty` ; set -o monitor ; trap 'rm /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc /tmp/Microsoft-MIEngine-Cmd-8javqqlo.qom' EXIT ; /opt/rh/devtoolset-7/root/usr/bin/gdb --interpreter=mi --tty=$DbgTerm < /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g > /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji & clear; pid=$! ; echo $pid > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; wait $pid; \n"},"seq":30,"type":"event"}
1: (677) DbgCmd:echo $$ > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; cd /home/myuser/myproj/Debug/bin ; DbgTerm=`tty` ; set -o monitor ; trap 'rm /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc /tmp/Microsoft-MIEngine-Cmd-8javqqlo.qom' EXIT ; /opt/rh/devtoolset-7/root/usr/bin/gdb --interpreter=mi --tty=$DbgTerm < /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g > /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji & clear; pid=$! ; echo $pid > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; wait $pid; 
--> C (runInTerminal-32): {"command":"runInTerminal","arguments":{"kind":"external","title":"cppdbg: MyApp","cwd":"","args":["sh","/tmp/Microsoft-MIEngine-Cmd-8javqqlo.qom"],"env":{}},"seq":32,"type":"request"}
--> E (output): {"event":"output","body":{"category":"console","output":"1: (703) Wait for connection completion.\n"},"seq":34,"type":"event"}
1: (703) Wait for connection completion.

[s-martin]

BTW: how can I go back to 0.19 for the moment?

[yesenarman]

@s-martin download the v0.19 VSIX and then use Extension: Install from VSIX command. Also make sure to disable extensions auto update in the settings.

[s-martin]

@yesenarman: Thanks

OK, with 0.19.0 it works.
I tried 0.19.1-insiders3 also, which didn't worked with same behavior as in 0.20

[s-martin]

With 0.19.0 I see the following lines:

mts      32218  0.0  0.0 113172  1480 ?        S    14:03   0:00 bash /home/mts/.vscode/extensions/ms-vscode.cpptools-0.19.0/debugAdapters/OpenDebugAD7
mts      32228  9.8  0.8 850736 47936 ?        Sl   14:03   0:01 /home/mts/.vscode/extensions/ms-vscode.cpptools-0.19.0/debugAdapters/mono.linux-x86_64 --config /home/mts/.vscode/extensions/ms-vscode.cpptools-0.
mts      32257  0.0  0.0 113176  1504 pts/2    Ss+  14:04   0:00 bash -c echo $$ > /tmp/Microsoft-MIEngine-fifo-cboxg85b.lv6; cd /home/myuser/myproj/Debug/bin; 
mts      32261 20.9  2.9 367848 165004 pts/2   S+   14:04   0:02 /opt/rh/devtoolset-7/root/usr/bin/gdb --interpreter=mi --tty=/dev/pts/2

With 0.20 I see only the first 2 lines.

[pieandcakes]

With our change, we write the debug command to a temp file, something similar to:

echo $$ > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; cd /home/myuser/myproj/Debug/bin ; DbgTerm=`tty` ; set -o monitor ; trap 'rm /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc /tmp/Microsoft-MIEngine-Cmd-8javqqlo.qom' EXIT ; /opt/rh/devtoolset-7/root/usr/bin/gdb --interpreter=mi --tty=$DbgTerm < /tmp/Microsoft-MIEngine-In-ak4e18mf.n1g > /tmp/Microsoft-MIEngine-Out-4v5yxzvh.mji & clear; pid=$! ; echo $pid > /tmp/Microsoft-MIEngine-Pid-dgz9wks9.3xc ; wait $pid; 

then we send a command to VS Code through the protocol to run the command:

C (runInTerminal-32): {"command":"runInTerminal","arguments":{"kind":"external","title":"cppdbg: MyApp","cwd":"","args":["sh","/tmp/Microsoft-MIEngine-Cmd-8javqqlo.qom"],"env":{}},"seq":32,"type":"request"}

and then we wait for the fifos to be written to so we can start debugging.

In this instance, for some reason VS Code isn't able to launch debugging and I think that's what we need to figure out.

[s-martin]

@pieandcakes If you need any additional info, please let me know

[pieandcakes]

@s-martin Thanks. I just need time to setup a CentOS machine and figure out whats wrong with the command.

[undernones]

I am experiencing the same problem with C/C++ Extension Version: 0.20.1. My Linux system is my company's internal build of Kubuntu 16.04. I'm getting by on version 0.19.0 of the plugin for now.