Quelle Stack.sys.mjs Sprache: unbekannt

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**
* An object that contains details of a stack frame.
*
* @typedef {object} StackFrame
* @see nsIStackFrame
*
* @property {string=} asyncCause
*     Type of asynchronous call by which this frame was invoked.
* @property {number} columnNumber
*     The column number for this stack frame.
* @property {string} filename
*     The source URL for this stack frame.
* @property {string} function
*     SpiderMonkey’s inferred name for this stack frame’s function, or null.
* @property {number} lineNumber
*     The line number for this stack frame (starts with 1).
* @property {number} sourceId
*     The process-unique internal integer ID of this source.
*/

/**
* Return a list of stack frames from the given stack.
*
* Convert stack objects to the JSON attributes expected by consumers.
*
* @param {object} stack
*     The native stack object to process.
*
* @returns {Array<StackFrame>=}
*/
export function getFramesFromStack(stack) {
  if (!stack || (Cu && Cu.isDeadWrapper(stack))) {
    // If the global from which this error came from has been nuked,
    // stack is going to be a dead wrapper.
    return null;
  }

  const frames = [];
  while (stack) {
    frames.push({
      asyncCause: stack.asyncCause,
      columnNumber: stack.column,
      filename: stack.source,
      functionName: stack.functionDisplayName || "",
      lineNumber: stack.line,
      sourceId: stack.sourceId,
    });

    stack = stack.parent || stack.asyncParent;
  }

  return frames;
}

/**
* Check if a frame is from chrome scope.
*
* @param {object} frame
*     The frame to check
*
* @returns {boolean}
*     True, if frame is from chrome scope
*/
export function isChromeFrame(frame) {
  return (
    frame.filename.startsWith("chrome://") ||
    frame.filename.startsWith("resource://")
  );
}

Quelle Stack.sys.mjs Sprache: unbekannt

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