mirror of https://github.com/nodejs/node.git
64 lines
1.7 KiB
JavaScript
64 lines
1.7 KiB
JavaScript
'use strict';
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let hook;
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let config;
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function lazyHookCreation() {
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const inspector = internalBinding('inspector');
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const { createHook } = require('async_hooks');
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config = internalBinding('config');
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const { kNoPromiseHook } = require('internal/async_hooks');
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hook = createHook({
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init(asyncId, type, triggerAsyncId, resource) {
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// It's difficult to tell which tasks will be recurring and which won't,
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// therefore we mark all tasks as recurring. Based on the discussion
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// in https://github.com/nodejs/node/pull/13870#discussion_r124515293,
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// this should be fine as long as we call asyncTaskCanceled() too.
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const recurring = true;
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inspector.asyncTaskScheduled(type, asyncId, recurring);
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},
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before(asyncId) {
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inspector.asyncTaskStarted(asyncId);
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},
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after(asyncId) {
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inspector.asyncTaskFinished(asyncId);
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},
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destroy(asyncId) {
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inspector.asyncTaskCanceled(asyncId);
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},
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});
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hook[kNoPromiseHook] = true;
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}
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function enable() {
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if (hook === undefined) lazyHookCreation();
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if (config.bits < 64) {
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// V8 Inspector stores task ids as (void*) pointers.
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// async_hooks store ids as 64bit numbers.
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// As a result, we cannot reliably translate async_hook ids to V8 async_task
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// ids on 32bit platforms.
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process.emitWarning(
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'Warning: Async stack traces in debugger are not available ' +
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`on ${config.bits}bit platforms. The feature is disabled.`,
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{
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code: 'INSPECTOR_ASYNC_STACK_TRACES_NOT_AVAILABLE',
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});
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} else {
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hook.enable();
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}
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}
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function disable() {
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if (hook === undefined) lazyHookCreation();
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hook.disable();
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}
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module.exports = {
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enable,
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disable,
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};
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