Add memory usage limit of an IntelliSense process (#6240)

Author: michelleangela

Extension/package.json

@@ -848,6 +848,14 @@
           "scope": "machine-overridable",
           "minimum": 0
         },
+        "C_Cpp.intelliSenseMemoryLimit": {
+          "type": "number",
+          "default": 4096,
+          "description": "%c_cpp.configuration.intelliSenseMemoryLimit.description%",
+          "scope": "machine-overridable",
+          "minimum": 256,
+          "maximum": 16384
+        },
         "C_Cpp.default.includePath": {
           "type": [
             "array",

Extension/package.nls.json

@@ -132,7 +132,8 @@
     "c_cpp.configuration.commentContinuationPatterns.description": "Defines the editor behavior for when the Enter key is pressed inside a multiline or single line comment block.",
     "c_cpp.configuration.configurationWarnings.description": "Determines whether pop up notifications will be shown when a configuration provider extension is unable to provide a configuration for a source file.",
     "c_cpp.configuration.intelliSenseCachePath.description": "Defines the folder path for cached precompiled headers used by IntelliSense. The default cache path is \"%LocalAppData%/Microsoft/vscode-cpptools\" on Windows, \"$XDG_CACHE_HOME/vscode-cpptools/\" on Linux (or \"$HOME/.cache/vscode-cpptools/\" if XDG_CACHE_HOME is not defined), and \"$HOME/Library/Caches/vscode-cpptools/\" on Mac. The default path will be used if no path is specified or if a specified path is invalid.",
-    "c_cpp.configuration.intelliSenseCacheSize.description": "Maximum size of the per-workspace hard drive space in megabytes for cached precompiled headers; the actual usage may fluctuate around this value. The default size is 5120 MB. Precompiled header caching is disabled when the size is 0.",
+    "c_cpp.configuration.intelliSenseCacheSize.description": "Maximum size of the per-workspace hard drive space in megabytes (MB) for cached precompiled headers; the actual usage may fluctuate around this value. The default size is 5120 MB. Precompiled header caching is disabled when the size is 0.",
+    "c_cpp.configuration.intelliSenseMemoryLimit.description": "Memory usage limit in megabytes (MB) of an IntelliSense process. The default limit is 4096 MB and the maximum limit is 16 GB. The extension will shutdown and restart an IntelliSense process when it exceeds the limit.",
     "c_cpp.configuration.default.includePath.description": "The value to use in a configuration if \"includePath\" is not specified in c_cpp_properties.json. If \"includePath\" is specified, add \"${default}\" to the array to insert the values from this setting.",
     "c_cpp.configuration.default.defines.description": "The value to use in a configuration if \"defines\" is not specified, or the values to insert if \"${default}\" is present in \"defines\".",
     "c_cpp.configuration.default.macFrameworkPath.description": "The value to use in a configuration if \"macFrameworkPath\" is not specified, or the values to insert if \"${default}\" is present in \"macFrameworkPath\".",

Extension/src/LanguageServer/client.ts

@@ -905,6 +905,7 @@ export class DefaultClient implements Client {
         const settings_defaultSystemIncludePath: (string[] | undefined)[] = [];
         const settings_intelliSenseCachePath: (string | undefined)[] = [];
         const settings_intelliSenseCacheSize: (number | undefined)[] = [];
+        const settings_intelliSenseMemoryLimit: (number | undefined)[] = [];
         const settings_autoComplete: (string | undefined)[] = [];
         const workspaceSettings: CppSettings = new CppSettings();
         const workspaceOtherSettings: OtherSettings = new OtherSettings();
@@ -1057,6 +1058,7 @@ export class DefaultClient implements Client {
                 settings_defaultSystemIncludePath.push(setting.defaultSystemIncludePath);
                 settings_intelliSenseCachePath.push(util.resolveCachePath(setting.intelliSenseCachePath, this.AdditionalEnvironment));
                 settings_intelliSenseCacheSize.push(setting.intelliSenseCacheSize);
+                settings_intelliSenseMemoryLimit.push(setting.intelliSenseMemoryLimit);
                 settings_autoComplete.push(setting.autoComplete);
             }
 
@@ -1181,6 +1183,7 @@ export class DefaultClient implements Client {
                 intelliSenseCacheDisabled: intelliSenseCacheDisabled,
                 intelliSenseCachePath : settings_intelliSenseCachePath,
                 intelliSenseCacheSize : settings_intelliSenseCacheSize,
+                intelliSenseMemoryLimit : settings_intelliSenseMemoryLimit,
                 autocomplete: settings_autoComplete,
                 errorSquiggles: settings_errorSquiggles,
                 dimInactiveRegions: settings_dimInactiveRegions,

Extension/src/LanguageServer/settings.ts

@@ -115,6 +115,7 @@ export class CppSettings extends Settings {
     public get intelliSenseEngineFallback(): string | undefined { return super.Section.get<string>("intelliSenseEngineFallback"); }
     public get intelliSenseCachePath(): string | undefined { return super.Section.get<string>("intelliSenseCachePath"); }
     public get intelliSenseCacheSize(): number | undefined { return super.Section.get<number>("intelliSenseCacheSize"); }
+    public get intelliSenseMemoryLimit(): number | undefined { return super.Section.get<number>("intelliSenseMemoryLimit"); }
     public get errorSquiggles(): string | undefined { return super.Section.get<string>("errorSquiggles"); }
     public get inactiveRegionOpacity(): number | undefined { return super.Section.get<number>("inactiveRegionOpacity"); }
     public get inactiveRegionForegroundColor(): string | undefined { return super.Section.get<string>("inactiveRegionForegroundColor"); }

Extension/src/nativeStrings.json

@@ -217,5 +217,6 @@
     "cpp_probing_compiler_default_standard": "Probing compiler for default C++ language standard using command line: {0}",
     "detected_language_standard_version": "Detected language standard version: {0}",
     "unhandled_default_target_detected": "Unhandled default compiler target value detected: {0}",
-    "unhandled_target_arg_detected": "Unhandled target argument value detected: {0}"
+    "unhandled_target_arg_detected": "Unhandled target argument value detected: {0}",
+    "memory_limit_shutting_down_intellisense": "Shutting down IntelliSense server: {0}. Memory usage is {1} MB and has exceeded the {2} MB limit."
 }