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qt-qml, qt-core: Pass 127.0.0.1 instead of localhost to the QML debugger #538

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Merged
OrkunTokdemir merged 1 commit into from
Aug 4, 2026
Merged

qt-qml, qt-core: Pass 127.0.0.1 instead of localhost to the QML debugger #538

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6 changes: 4 additions & 2 deletions qt-core/src/project-config-generator.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -121,13 +121,15 @@ function qmlAttachLaunchConfig(): LaunchConfiguration {
name: 'Attach to QML debugger',
type: 'qml',
request: 'attach',
host: 'localhost',
host: '127.0.0.1',
port: '${command:qt-qml.debugPort}'
};
}

// The QML debug server only accepts an IP address literal as the host, so
// "localhost" would make it listen on all interfaces (VSCODEEXT-219).
const qmlDebuggerArgs =
'-qmljsdebugger=host:localhost,port:${command:qt-qml.debugPort},' +
'-qmljsdebugger=host:127.0.0.1,port:${command:qt-qml.debugPort},' +
'block,services:DebugMessages,QmlDebugger,V8Debugger';

function cppQmlCppdbgLaunchConfig(): LaunchConfiguration {
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10 changes: 5 additions & 5 deletions qt-qml/package.json
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Original file line number Diff line number Diff line change
Expand Up @@ -365,7 +365,7 @@
"host": {
"type": "string",
"description": "Hostname (or IP address) of the target program's debug service",
"default": "localhost"
"default": "127.0.0.1"
},
"port": {
"type": [
Expand Down Expand Up @@ -418,7 +418,7 @@
"type": "qml",
"request": "attach",
"name": "Attach to QML debugger",
"host": "localhost",
"host": "127.0.0.1",
"port": "^\"Custom port or \\${command:qt-qml.debugPort} for compound usage\""
}
],
Expand All @@ -440,7 +440,7 @@
"name": "%qt-qml.debug.qmlDebuggingAttach.label%",
"type": "qml",
"request": "attach",
"host": "localhost",
"host": "127.0.0.1",
"port": "^\"Custom port or \\${command:qt-qml.debugPort} for compound usage\""
}
},
Expand All @@ -457,7 +457,7 @@
"visualizerFile": "^\"\\${command:qt-cpp.natvis}\"",
"showDisplayString": true,
"args": [
"^\"-qmljsdebugger=host:localhost,port:\\${command:qt-qml.debugPort},block,services:DebugMessages,QmlDebugger,V8Debugger\""
"^\"-qmljsdebugger=host:127.0.0.1,port:\\${command:qt-qml.debugPort},block,services:DebugMessages,QmlDebugger,V8Debugger\""
],
"linux": {
"MIMode": "gdb",
Expand Down Expand Up @@ -511,7 +511,7 @@
"cwd": "^\"\\${workspaceFolder}\"",
"visualizerFile": "^\"\\${command:qt-cpp.natvis}\"",
"args": [
"^\"-qmljsdebugger=host:localhost,port:\\${command:qt-qml.debugPort},block,services:DebugMessages,QmlDebugger,V8Debugger\""
"^\"-qmljsdebugger=host:127.0.0.1,port:\\${command:qt-qml.debugPort},block,services:DebugMessages,QmlDebugger,V8Debugger\""
],
"windows": {
"sourceFileMap": {
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5 changes: 4 additions & 1 deletion qt-qml/src/debug/debug-adapter.mts
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Original file line number Diff line number Diff line change
Expand Up @@ -595,7 +595,10 @@ export class QmlDebugSession extends LoggingDebugSession {
let port: number | undefined;
let host: string | undefined;
if (args.debuggerArgs === undefined) {
host = 'localhost';
// The QML debug server parses the host as an IP address literal, so
// hostnames like "localhost" are rejected and the server would fall
// back to listening on all interfaces (VSCODEEXT-219).
host = '127.0.0.1';
port = await getPort();
debuggerArgs = `-qmljsdebugger=host:${host},port:${port.toString()},block,services:DebugMessages,QmlDebugger,V8Debugger`;
} else {
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