Function lazyGetStructuredStack

lib/internal/util.js:549–567

()

let getStructuredStackImpl;

function lazyGetStructuredStack() {
  if (getStructuredStackImpl === undefined) {
    // Lazy-load to avoid a circular dependency.
    const { runInNewContext } = require('vm');
    // Use `runInNewContext()` to get something tamper-proof and
    // side-effect-free. Since this is currently only used for a deprecated API
    // and module mocking, the perf implications should be okay.
    getStructuredStackImpl = runInNewContext(`(function() {
      try { Error.stackTraceLimit = Infinity; } catch {}
      return function structuredStack() {
        const e = new Error();
        overrideStackTrace.set(e, (err, trace) => trace);
        return e.stack;
      };
    })()`, { overrideStackTrace }, { filename: 'structured-stack' });
  }

  return getStructuredStackImpl;
}

function getStructuredStack() {
  const getStructuredStackImpl = lazyGetStructuredStack();