Language service hangs after custom provider times out #13862
Description
Environment
- OS and Version: Windows 11 version 10.0.22631
- VS Code Version: 1.103.1
- C/C++ Extension Version: 1.26.3
Bug Summary and Steps to Reproduce
Bug Summary: When using a custom configuration provider for intellisense and the provider hits the two second timeout for providing a configuration for a file, the C/C++ language service sometimes hangs. In this state, it doesn't respond to LSP requests (e.g. hovering a symbol shows "Loading..." forever), running C/C++: Log Diagnostics does nothing and the Language Status popup shows as parsing indefinitely:
Steps to reproduce:
I can reproduce the issue with this sample configuration provider:
import { dirname } from 'path'; import * as vscode from 'vscode'; import { CppToolsApi, Version, CustomConfigurationProvider, getCppToolsApi, SourceFileConfigurationItem, WorkspaceBrowseConfiguration } from 'vscode-cpptools'; let api: CppToolsApi | undefined = undefined; export async function activate(context: vscode.ExtensionContext) { api = await getCppToolsApi(Version.v2); const provider = new Provider(); if (api) { if (api.notifyReady) { api.registerCustomConfigurationProvider(provider); api.notifyReady(provider); } } } export function deactivate() { api?.dispose(); } class Provider implements CustomConfigurationProvider { name: string = "cpptools-provider"; extensionId: string = "cpptools-provider"; canProvideConfiguration(uri: vscode.Uri, token?: vscode.CancellationToken): Thenable<boolean> { return Promise.resolve(true); } async provideConfigurations(uris: vscode.Uri[], token?: vscode.CancellationToken): Promise<SourceFileConfigurationItem[]> { console.log(`cpptools-provider: provideConfigurations called for ${uris.length} URIs.`); await new Promise(resolve => setTimeout(resolve, 5000)); // Simulate async work return uris.map(uri => { return { uri, configuration: { defines: [], includePath: [dirname(uri.fsPath)], compilerPath: "", standard: "c17", compilerArgs: [], intelliSenseMode: "windows-clang-arm", } }; }); } canProvideBrowseConfiguration(token?: vscode.CancellationToken): Thenable<boolean> { return Promise.resolve(true); } provideBrowseConfiguration(token?: vscode.CancellationToken): Thenable<WorkspaceBrowseConfiguration | null> { return Promise.resolve(null); } canProvideBrowseConfigurationsPerFolder(token?: vscode.CancellationToken): Thenable<boolean> { return Promise.resolve(false); } provideFolderBrowseConfiguration(uri: vscode.Uri, token?: vscode.CancellationToken): Thenable<WorkspaceBrowseConfiguration | null> { throw new Error('Method not implemented.'); } dispose() { } }Steps:
- Run the code above as an extension (with "*" as the activation event)
- Open a folder with a C/C++ codebase that is large enough that it takes more than ~6 seconds to index
- Open a C/C++ file to trigger the configuration provider
- Wait until the indexing would normally be finished. As far as I can tell, if running
C/C++: Log Diagnosticsproduces any output, the language service is still indexing; if it does not, the language service has hanged.
For me, this takes a few tries to hit. It only hangs about once every four tries.
Configuration and Logs
loggingLevel: 6 Custom configuration provider 'cpptools-provider' registered LSP: (received - deferred) textDocument/didOpen: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c LSP: (received) cpptools/initialize (id: 1) LSP: (invoked) cpptools/initialize (id: 1) cpptools version (TypeScript): 1.26.3 cpptools version (native): 1.26.3.0 Autocomplete is enabled. Error squiggles are enabled if all header dependencies are resolved. Hover is enabled. IntelliSense Engine = default. LSP: Sending response (id: 1) LSP: (received) cpptools/queryCompilerDefaults (id: 2) LSP: (invoked) cpptools/queryCompilerDefaults (id: 2) Compiler info database not connected - skipping load. Compiler info database not connected - skipping load. LSP: Sending response (id: 2) LSP: (received) cpptools/queryCompilerDefaults (id: 3) LSP: (invoked) cpptools/queryCompilerDefaults (id: 3) Compiler info database not connected - skipping load. Compiler info database not connected - skipping load. LSP: Sending response (id: 3) LSP: (received) cpptools/didChangeCppProperties (id: 4) LSP: (invoked) cpptools/didChangeCppProperties (id: 4) Code browsing service initialized LSP: (received - deferred) cpptools/didChangeVisibleTextEditors Populating file name cache... LSP: (received) cpptools/didChangeSettings Attempting to get defaults from C compiler in "compilerPath" property: 'cl.exe' Attempting to get defaults from C++ compiler in "compilerPath" property: 'cl.exe' Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\CPPWINRT will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\SHARED will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UCRT will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UM will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\WINRT will be indexed Folder: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\ATLMFC\INCLUDE will be indexed Folder: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\INCLUDE will be indexed Folder: D:\EW PROJECTS\ARM\9.50.1\ST\STM32F0XX\IAR-STM32F051R8-SK\UART-LCD will be indexed LSP: (queued) textDocument/didOpen: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c LSP: (queued) cpptools/didChangeVisibleTextEditors LSP: Sending response (id: 4) LSP: (invoked) cpptools/didChangeSettings Discovering files... Autocomplete is enabled. Error squiggles are enabled if all header dependencies are resolved. Hover is enabled. IntelliSense Engine = default. Enhanced Colorization is enabled. LSP: (invoked) textDocument/didOpen: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c LSP: (invoked) cpptools/didChangeVisibleTextEditors Intellisense update pending for: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c Requesting a custom configuration for: D:\EW PROJECTS\ARM\9.50.1\ST\STM32F0XX\IAR-STM32F051R8-SK\UART-LCD\MAIN.C Processing folder (recursive): C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UCRT Processing folder (recursive): C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\CPPWINRT Processing folder (recursive): C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\SHARED Processing folder (recursive): C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UM LSP: (received) cpptools/didChangeCppProperties (id: 5) LSP: (invoked) cpptools/didChangeCppProperties (id: 5) Attempting to get defaults from C compiler in "compilerPath" property: 'cl.exe' LSP: (received) cpptools/didChangeVisibleTextEditors Attempting to get defaults from C++ compiler in "compilerPath" property: 'cl.exe' Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\CPPWINRT will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\SHARED will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UCRT will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\UM will be indexed Folder: C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\WINRT will be indexed Folder: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\ATLMFC\INCLUDE will be indexed Folder: C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\INCLUDE will be indexed Folder: D:\EW PROJECTS\ARM\9.50.1\ST\STM32F0XX\IAR-STM32F051R8-SK\UART-LCD will be indexed LSP: Sending response (id: 5) LSP: (invoked) cpptools/didChangeVisibleTextEditors Processing folder (recursive): C:\PROGRAM FILES (X86)\WINDOWS KITS\10\INCLUDE\10.0.22621.0\WINRT LSP: (received) cpptools/didChangeVisibleTextEditors LSP: (invoked) cpptools/didChangeVisibleTextEditors LSP: (received) cpptools/getDocumentSymbols: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 6) LSP: (invoked) cpptools/getDocumentSymbols: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 6) LSP: Sending response (id: 6) Processing folder (non-recursive): C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\ATLMFC\INCLUDE LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 7) LSP: (invoked) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 7) LSP: Sending response (id: 7) LSP: (received) cpptools/getFoldingRanges: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 8) LSP: (invoked) cpptools/getFoldingRanges: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 8) LSP: Sending response (id: 8) LSP: (received) cpptools/pauseParsing LSP: (invoked) cpptools/pauseParsing LSP: (received) cpptools/clearCustomConfigurations LSP: (invoked) cpptools/clearCustomConfigurations LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 9) LSP: (invoked) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 9) LSP: Sending response (id: 9) LSP: $/cancelRequest (<unknown/completed>, id: 7) LSP: (received) cpptools/clearCustomConfigurations LSP: (invoked) cpptools/clearCustomConfigurations Processing folder (non-recursive): C:\PROGRAM FILES\MICROSOFT VISUAL STUDIO\2022\PROFESSIONAL\VC\TOOLS\MSVC\14.40.33807\INCLUDE Processing folder (recursive): D:\EW PROJECTS\ARM\9.50.1\ST\STM32F0XX\IAR-STM32F051R8-SK\UART-LCD Done populating filename cache. Elapsed time: 159 ms Discovering files: 5926 file(s) processed 0 file(s) removed from database Done discovering files. Parsing remaining files... Parsing: 0 files(s) processed Done parsing remaining files. IntelliSense update scheduled and TU acquisition started for: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c Requesting a custom configuration for: D:\EW PROJECTS\ARM\9.50.1\ST\STM32F0XX\IAR-STM32F051R8-SK\UART-LCD\MAIN.C LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 10) LSP: $/cancelRequest (cpptools/getCodeActions, id: 10) LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 11) LSP: $/cancelRequest (cpptools/getCodeActions, id: 11) LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 12) LSP: (received) cpptools/resumeParsing LSP: (received) cpptools/finishedRequestCustomConfig: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c LSP: (invoked) cpptools/finishedRequestCustomConfig: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c LSP: (received) cpptools/didChangeTextEditorSelection LSP: $/cancelRequest (cpptools/getCodeActions, id: 12) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 13) LSP: $/cancelRequest (cpptools/hover, id: 13) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 14) LSP: $/cancelRequest (cpptools/hover, id: 14) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 15) LSP: $/cancelRequest (cpptools/hover, id: 15) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 16) LSP: $/cancelRequest (cpptools/hover, id: 16) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 17) LSP: (received) cpptools/didChangeTextEditorSelection LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 18) LSP: $/cancelRequest (cpptools/hover, id: 17) LSP: (received) cpptools/hover: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 19) LSP: $/cancelRequest (cpptools/hover, id: 19) LSP: (received) cpptools/didChangeTextEditorSelection LSP: (received) cpptools/didChangeTextEditorSelection LSP: (received) cpptools/getCodeActions: file:///d%3A/EW%20Projects/arm/9.50.1/ST/STM32F0xx/IAR-STM32F051R8-SK/UART-LCD/main.c (id: 20) LSP: $/cancelRequest (cpptools/getCodeActions, id: 18)Other Extensions
No response
Additional context
No response
Metadata
Metadata
Assignees
Labels
Type
Projects
Status