faastjs/dist/src/trace.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.clearLeakDetector = exports.onAsyncHook = exports.stopAsyncTracing = exports.printHooks = exports.detectAsyncLeaks = exports.printAsyncStack = exports.trace = exports.startAsyncTracing = void 0;
const asyncHooks = require("async_hooks");
const util_1 = require("util");
let hook;
const asyncObjects = new Map();
const objectMapping = new Map();
function startAsyncTracing(stackTraces = false) {
    hook = onAsyncHook(stackTraces);
}
exports.startAsyncTracing = startAsyncTracing;
function trace(obj) {
    let res = objectMapping.get(obj);
    if (!res) {
        // console.log(`trace: object not found: ${util.inspect(obj)}`);
        return;
    }
    let asyncTrace = `== Tracing leaked object ${res.asyncId} ==`;
    while (res) {
        const { stack, ...rest } = res;
        asyncTrace += `${(0, util_1.inspect)(rest)}\n${stack}`;
        res = asyncObjects.get(res.triggerId);
    }
    console.log(asyncTrace);
    return { obj, trace: asyncTrace };
}
exports.trace = trace;
function printAsyncStack() {
    console.log(`Async stack:`);
    let res = asyncObjects.get(asyncHooks.executionAsyncId());
    while (res) {
        const { stack, ...rest } = res;
        console.log(`%O\n${stack}`, rest);
        res = asyncObjects.get(res.triggerId);
    }
}
exports.printAsyncStack = printAsyncStack;
function detectAsyncLeaks() {
    const leaks = [];
    process._getActiveHandles().forEach((h) => {
        if (h !== process.stdout && h !== process.stderr) {
            const leak = trace(h);
            leak && leaks.push(leak);
        }
    });
    process._getActiveRequests().forEach((h) => {
        const leak = trace(h);
        leak && leaks.push(leak);
    });
    return leaks;
}
exports.detectAsyncLeaks = detectAsyncLeaks;
function printHooks() {
    for (const obj of asyncObjects) {
        console.log(`%O`, obj);
    }
}
exports.printHooks = printHooks;
function stopAsyncTracing() {
    hook?.();
}
exports.stopAsyncTracing = stopAsyncTracing;
function onAsyncHook(stackTraces) {
    const hooks = {
        init,
        before,
        after,
        destroy,
        promiseResolve
    };
    const asyncHook = asyncHooks.createHook(hooks);
    asyncHook.enable();
    return () => {
        asyncHook.disable();
    };
    function init(asyncId, type, triggerId, resource) {
        const obj = {
            asyncId,
            type,
            triggerId,
            resource,
            state: "init",
            startedCount: 0,
            finishedCount: 0,
            stack: stackTraces
                ? new Error("stack:").stack.replace(/Error:/, "")
                : undefined
        };
        asyncObjects.set(asyncId, obj);
        objectMapping.set(resource, obj);
    }
    function destroy(asyncId) {
        const obj = asyncObjects.get(asyncId);
        if (obj) {
            obj.state = "destroyed";
        }
        else {
            // console.log(`destroyed: No obj ${asyncId}`);
        }
    }
    function before(asyncId) {
        const obj = asyncObjects.get(asyncId);
        if (obj) {
            obj.state = "before";
            obj.startedCount++;
        }
        else {
            // console.log(`before: No obj ${asyncId}`);
        }
    }
    function after(asyncId) {
        const obj = asyncObjects.get(asyncId);
        if (obj) {
            obj.state = "after";
            obj.finishedCount++;
        }
        else {
            // console.log(`after: No obj ${asyncId}`);
        }
    }
    function promiseResolve(asyncId) {
        const obj = asyncObjects.get(asyncId);
        if (obj) {
            obj.state = "resolved";
        }
        else {
            // console.log(`resolved: No obj ${asyncId}`);
        }
    }
}
exports.onAsyncHook = onAsyncHook;
function clearLeakDetector() {
    asyncObjects.clear();
    objectMapping.clear();
}
exports.clearLeakDetector = clearLeakDetector;
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* as asyncHooks from \"async_hooks\";\nimport { inspect } from \"util\";\n\nlet hook: () => void | undefined;\n\ntype AsyncState = \"init\" | \"before\" | \"after\" | \"destroyed\" | \"resolved\";\n\ninterface AsyncObject {\n    asyncId: number;\n    type: string;\n    triggerId: number;\n    resource: any;\n    state: AsyncState;\n    startedCount: number;\n    finishedCount: number;\n    stack?: string;\n}\n\nconst asyncObjects: Map<number, AsyncObject> = new Map();\nconst objectMapping: Map<object, AsyncObject> = new Map();\n\nexport function startAsyncTracing(stackTraces: boolean = false) {\n    hook = onAsyncHook(stackTraces);\n}\n\ninterface Trace {\n    obj: object;\n    trace: string;\n}\n\nexport function trace(obj: object): Trace | void {\n    let res = objectMapping.get(obj);\n    if (!res) {\n        // console.log(`trace: object not found: ${util.inspect(obj)}`);\n        return;\n    }\n    let asyncTrace = `== Tracing leaked object ${res.asyncId} ==`;\n    while (res) {\n        const { stack, ...rest } = res;\n        asyncTrace += `${inspect(rest)}\\n${stack}`;\n        res = asyncObjects.get(res.triggerId);\n    }\n    console.log(asyncTrace);\n    return { obj, trace: asyncTrace };\n}\n\nexport function printAsyncStack() {\n    console.log(`Async stack:`);\n    let res = asyncObjects.get(asyncHooks.executionAsyncId());\n    while (res) {\n        const { stack, ...rest } = res;\n        console.log(`%O\\n${stack}`, rest);\n        res = asyncObjects.get(res.triggerId);\n    }\n}\n\nexport function detectAsyncLeaks(): object[] {\n    const leaks: Trace[] = [];\n    (process as any)._getActiveHandles().forEach((h: object) => {\n        if (h !== process.stdout && h !== process.stderr) {\n            const leak = trace(h);\n            leak && leaks.push(leak);\n        }\n    });\n    (process as any)._getActiveRequests().forEach((h: object) => {\n        const leak = trace(h);\n        leak && leaks.push(leak);\n    });\n    return leaks;\n}\n\nexport function printHooks() {\n    for (const obj of asyncObjects) {\n        console.log(`%O`, obj);\n    }\n}\n\nexport function stopAsyncTracing() {\n    hook?.();\n}\n\nexport function onAsyncHook(stackTraces: boolean) {\n    const hooks: asyncHooks.HookCallbacks = {\n        init,\n        before,\n        after,\n        destroy,\n        promiseResolve\n    };\n\n    const asyncHook = asyncHooks.createHook(hooks);\n    asyncHook.enable();\n\n    return () => {\n        asyncHook.disable();\n    };\n\n    function init(asyncId: number, type: string, triggerId: number, resource: object) {\n        const obj: AsyncObject = {\n            asyncId,\n            type,\n            triggerId,\n            resource,\n            state: \"init\",\n            startedCount: 0,\n            finishedCount: 0,\n            stack: stackTraces\n                ? new Error(\"stack:\").stack!.replace(/Error:/, \"\")\n                : undefined\n        };\n        asyncObjects.set(asyncId, obj);\n        objectMapping.set(resource, obj);\n    }\n    function destroy(asyncId: number) {\n        const obj = asyncObjects.get(asyncId);\n        if (obj) {\n            obj.state = \"destroyed\";\n        } else {\n            // console.log(`destroyed: No obj ${asyncId}`);\n        }\n    }\n    function before(asyncId: number) {\n        const obj = asyncObjects.get(asyncId);\n        if (obj) {\n            obj.state = \"before\";\n            obj.startedCount++;\n        } else {\n            // console.log(`before: No obj ${asyncId}`);\n        }\n    }\n    function after(asyncId: number) {\n        const obj = asyncObjects.get(asyncId);\n        if (obj) {\n            obj.state = \"after\";\n            obj.finishedCount++;\n        } else {\n            // console.log(`after: No obj ${asyncId}`);\n        }\n    }\n    function promiseResolve(asyncId: number) {\n        const obj = asyncObjects.get(asyncId);\n        if (obj) {\n            obj.state = \"resolved\";\n        } else {\n            // console.log(`resolved: No obj ${asyncId}`);\n        }\n    }\n}\n\nexport function clearLeakDetector() {\n    asyncObjects.clear();\n    objectMapping.clear();\n}\n"]}