478 lines
14 KiB
JavaScript
478 lines
14 KiB
JavaScript
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"use strict";
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module.exports = function() {
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var async = require("./async.js");
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var util = require("./util.js");
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var bluebirdFramePattern =
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/[\\\/]bluebird[\\\/]js[\\\/](main|debug|zalgo|instrumented)/;
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var stackFramePattern = null;
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var formatStack = null;
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var indentStackFrames = false;
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function CapturedTrace(parent) {
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this._parent = parent;
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var length = this._length = 1 + (parent === undefined ? 0 : parent._length);
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captureStackTrace(this, CapturedTrace);
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if (length > 32) this.uncycle();
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}
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util.inherits(CapturedTrace, Error);
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CapturedTrace.prototype.uncycle = function() {
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var length = this._length;
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if (length < 2) return;
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var nodes = [];
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var stackToIndex = {};
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for (var i = 0, node = this; node !== undefined; ++i) {
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nodes.push(node);
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node = node._parent;
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}
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length = this._length = i;
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for (var i = length - 1; i >= 0; --i) {
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var stack = nodes[i].stack;
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if (stackToIndex[stack] === undefined) {
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stackToIndex[stack] = i;
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}
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}
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for (var i = 0; i < length; ++i) {
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var currentStack = nodes[i].stack;
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var index = stackToIndex[currentStack];
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if (index !== undefined && index !== i) {
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if (index > 0) {
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nodes[index - 1]._parent = undefined;
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nodes[index - 1]._length = 1;
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}
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nodes[i]._parent = undefined;
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nodes[i]._length = 1;
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var cycleEdgeNode = i > 0 ? nodes[i - 1] : this;
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if (index < length - 1) {
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cycleEdgeNode._parent = nodes[index + 1];
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cycleEdgeNode._parent.uncycle();
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cycleEdgeNode._length =
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cycleEdgeNode._parent._length + 1;
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} else {
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cycleEdgeNode._parent = undefined;
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cycleEdgeNode._length = 1;
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}
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var currentChildLength = cycleEdgeNode._length + 1;
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for (var j = i - 2; j >= 0; --j) {
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nodes[j]._length = currentChildLength;
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currentChildLength++;
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}
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return;
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}
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}
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};
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CapturedTrace.prototype.parent = function() {
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return this._parent;
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};
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CapturedTrace.prototype.hasParent = function() {
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return this._parent !== undefined;
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};
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CapturedTrace.prototype.attachExtraTrace = function(error) {
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if (error.__stackCleaned__) return;
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this.uncycle();
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var parsed = CapturedTrace.parseStackAndMessage(error);
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var message = parsed.message;
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var stacks = [parsed.stack];
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var trace = this;
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while (trace !== undefined) {
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stacks.push(cleanStack(trace.stack.split("\n")));
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trace = trace._parent;
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}
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removeCommonRoots(stacks);
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removeDuplicateOrEmptyJumps(stacks);
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error.stack = reconstructStack(message, stacks);
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error.__stackCleaned__ = true;
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};
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function reconstructStack(message, stacks) {
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for (var i = 0; i < stacks.length - 1; ++i) {
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stacks[i].push("From previous event:");
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stacks[i] = stacks[i].join("\n");
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}
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if (i < stacks.length) {
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stacks[i] = stacks[i].join("\n");
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}
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return message + "\n" + stacks.join("\n");
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}
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function removeDuplicateOrEmptyJumps(stacks) {
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for (var i = 0; i < stacks.length; ++i) {
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if (stacks[i].length === 0 ||
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((i + 1 < stacks.length) && stacks[i][0] === stacks[i+1][0])) {
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stacks.splice(i, 1);
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i--;
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}
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}
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}
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function removeCommonRoots(stacks) {
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var current = stacks[0];
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for (var i = 1; i < stacks.length; ++i) {
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var prev = stacks[i];
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var currentLastIndex = current.length - 1;
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var currentLastLine = current[currentLastIndex];
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var commonRootMeetPoint = -1;
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for (var j = prev.length - 1; j >= 0; --j) {
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if (prev[j] === currentLastLine) {
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commonRootMeetPoint = j;
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break;
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}
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}
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for (var j = commonRootMeetPoint; j >= 0; --j) {
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var line = prev[j];
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if (current[currentLastIndex] === line) {
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current.pop();
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currentLastIndex--;
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} else {
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break;
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}
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}
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current = prev;
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}
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}
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function cleanStack(stack) {
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var ret = [];
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for (var i = 0; i < stack.length; ++i) {
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var line = stack[i];
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var isTraceLine = stackFramePattern.test(line) ||
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" (No stack trace)" === line;
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var isInternalFrame = isTraceLine && shouldIgnore(line);
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if (isTraceLine && !isInternalFrame) {
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if (indentStackFrames && line.charAt(0) !== " ") {
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line = " " + line;
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}
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ret.push(line);
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}
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}
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return ret;
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}
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function stackFramesAsArray(error) {
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var stack = error.stack.replace(/\s+$/g, "").split("\n");
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for (var i = 0; i < stack.length; ++i) {
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var line = stack[i];
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if (" (No stack trace)" === line || stackFramePattern.test(line)) {
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break;
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}
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}
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if (i > 0) {
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stack = stack.slice(i);
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}
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return stack;
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}
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CapturedTrace.parseStackAndMessage = function(error) {
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var stack = error.stack;
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var message = error.toString();
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stack = typeof stack === "string" && stack.length > 0
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? stackFramesAsArray(error) : [" (No stack trace)"];
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return {
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message: message,
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stack: cleanStack(stack)
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};
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};
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CapturedTrace.formatAndLogError = function(error, title) {
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if (typeof console === "object") {
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var message;
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if (typeof error === "object" || typeof error === "function") {
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var stack = error.stack;
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message = title + formatStack(stack, error);
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} else {
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message = title + String(error);
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}
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if (typeof console.warn === "function" ||
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typeof console.warn === "object") {
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console.warn(message);
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} else if (typeof console.log === "function" ||
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typeof console.log === "object") {
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console.log(message);
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}
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}
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};
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CapturedTrace.unhandledRejection = function (reason) {
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CapturedTrace.formatAndLogError(reason, "^--- With additional stack trace: ");
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};
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CapturedTrace.isSupported = function () {
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return typeof captureStackTrace === "function";
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};
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CapturedTrace.fireRejectionEvent =
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function(name, localHandler, reason, promise) {
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var localEventFired = false;
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try {
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if (typeof localHandler === "function") {
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localEventFired = true;
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if (name === "rejectionHandled") {
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localHandler(promise);
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} else {
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localHandler(reason, promise);
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}
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}
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} catch (e) {
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async.throwLater(e);
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}
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var globalEventFired = false;
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try {
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globalEventFired = fireGlobalEvent(name, reason, promise);
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} catch (e) {
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globalEventFired = true;
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async.throwLater(e);
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}
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var domEventFired = false;
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if (fireDomEvent) {
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try {
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domEventFired = fireDomEvent(name.toLowerCase(), {
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reason: reason,
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promise: promise
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});
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} catch (e) {
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domEventFired = true;
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async.throwLater(e);
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}
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}
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if (!globalEventFired && !localEventFired && !domEventFired &&
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name === "unhandledRejection") {
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CapturedTrace.formatAndLogError(reason, "Possibly unhandled ");
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}
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};
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function formatNonError(obj) {
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var str;
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if (typeof obj === "function") {
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str = "[function " +
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(obj.name || "anonymous") +
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"]";
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} else {
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str = obj.toString();
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var ruselessToString = /\[object [a-zA-Z0-9$_]+\]/;
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if (ruselessToString.test(str)) {
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try {
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var newStr = JSON.stringify(obj);
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str = newStr;
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}
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catch(e) {
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}
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}
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if (str.length === 0) {
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str = "(empty array)";
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}
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}
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return ("(<" + snip(str) + ">, no stack trace)");
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}
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function snip(str) {
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var maxChars = 41;
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if (str.length < maxChars) {
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return str;
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}
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return str.substr(0, maxChars - 3) + "...";
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}
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var shouldIgnore = function() { return false; };
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var parseLineInfoRegex = /[\/<\(]([^:\/]+):(\d+):(?:\d+)\)?\s*$/;
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function parseLineInfo(line) {
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var matches = line.match(parseLineInfoRegex);
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if (matches) {
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return {
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fileName: matches[1],
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line: parseInt(matches[2], 10)
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};
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}
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}
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CapturedTrace.setBounds = function(firstLineError, lastLineError) {
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if (!CapturedTrace.isSupported()) return;
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var firstStackLines = firstLineError.stack.split("\n");
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var lastStackLines = lastLineError.stack.split("\n");
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var firstIndex = -1;
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var lastIndex = -1;
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var firstFileName;
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var lastFileName;
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for (var i = 0; i < firstStackLines.length; ++i) {
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var result = parseLineInfo(firstStackLines[i]);
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if (result) {
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firstFileName = result.fileName;
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firstIndex = result.line;
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break;
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}
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}
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for (var i = 0; i < lastStackLines.length; ++i) {
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var result = parseLineInfo(lastStackLines[i]);
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if (result) {
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lastFileName = result.fileName;
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lastIndex = result.line;
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break;
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}
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}
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if (firstIndex < 0 || lastIndex < 0 || !firstFileName || !lastFileName ||
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firstFileName !== lastFileName || firstIndex >= lastIndex) {
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return;
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}
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shouldIgnore = function(line) {
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if (bluebirdFramePattern.test(line)) return true;
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var info = parseLineInfo(line);
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if (info) {
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if (info.fileName === firstFileName &&
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(firstIndex <= info.line && info.line <= lastIndex)) {
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return true;
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}
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}
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return false;
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};
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};
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var captureStackTrace = (function stackDetection() {
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var v8stackFramePattern = /^\s*at\s*/;
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var v8stackFormatter = function(stack, error) {
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if (typeof stack === "string") return stack;
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if (error.name !== undefined &&
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error.message !== undefined) {
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return error.toString();
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}
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return formatNonError(error);
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};
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if (typeof Error.stackTraceLimit === "number" &&
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typeof Error.captureStackTrace === "function") {
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Error.stackTraceLimit = Error.stackTraceLimit + 6;
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stackFramePattern = v8stackFramePattern;
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formatStack = v8stackFormatter;
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var captureStackTrace = Error.captureStackTrace;
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shouldIgnore = function(line) {
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return bluebirdFramePattern.test(line);
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};
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return function(receiver, ignoreUntil) {
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Error.stackTraceLimit = Error.stackTraceLimit + 6;
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captureStackTrace(receiver, ignoreUntil);
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Error.stackTraceLimit = Error.stackTraceLimit - 6;
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};
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}
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var err = new Error();
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if (typeof err.stack === "string" &&
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err.stack.split("\n")[0].indexOf("stackDetection@") >= 0) {
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stackFramePattern = /@/;
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formatStack = v8stackFormatter;
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indentStackFrames = true;
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return function captureStackTrace(o) {
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o.stack = new Error().stack;
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};
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}
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var hasStackAfterThrow;
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try { throw new Error(); }
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catch(e) {
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hasStackAfterThrow = ("stack" in e);
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}
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if (!("stack" in err) && hasStackAfterThrow) {
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stackFramePattern = v8stackFramePattern;
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formatStack = v8stackFormatter;
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return function captureStackTrace(o) {
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Error.stackTraceLimit = Error.stackTraceLimit + 6;
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try { throw new Error(); }
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catch(e) { o.stack = e.stack; }
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Error.stackTraceLimit = Error.stackTraceLimit - 6;
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|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
formatStack = function(stack, error) {
|
||
|
|
if (typeof stack === "string") return stack;
|
||
|
|
|
||
|
|
if ((typeof error === "object" ||
|
||
|
|
typeof error === "function") &&
|
||
|
|
error.name !== undefined &&
|
||
|
|
error.message !== undefined) {
|
||
|
|
return error.toString();
|
||
|
|
}
|
||
|
|
return formatNonError(error);
|
||
|
|
};
|
||
|
|
|
||
|
|
return null;
|
||
|
|
|
||
|
|
})([]);
|
||
|
|
|
||
|
|
var fireDomEvent;
|
||
|
|
var fireGlobalEvent = (function() {
|
||
|
|
if (util.isNode) {
|
||
|
|
return function(name, reason, promise) {
|
||
|
|
if (name === "rejectionHandled") {
|
||
|
|
return process.emit(name, promise);
|
||
|
|
} else {
|
||
|
|
return process.emit(name, reason, promise);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
} else {
|
||
|
|
var customEventWorks = false;
|
||
|
|
var anyEventWorks = true;
|
||
|
|
try {
|
||
|
|
var ev = new self.CustomEvent("test");
|
||
|
|
customEventWorks = ev instanceof CustomEvent;
|
||
|
|
} catch (e) {}
|
||
|
|
if (!customEventWorks) {
|
||
|
|
try {
|
||
|
|
var event = document.createEvent("CustomEvent");
|
||
|
|
event.initCustomEvent("testingtheevent", false, true, {});
|
||
|
|
self.dispatchEvent(event);
|
||
|
|
} catch (e) {
|
||
|
|
anyEventWorks = false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (anyEventWorks) {
|
||
|
|
fireDomEvent = function(type, detail) {
|
||
|
|
var event;
|
||
|
|
if (customEventWorks) {
|
||
|
|
event = new self.CustomEvent(type, {
|
||
|
|
detail: detail,
|
||
|
|
bubbles: false,
|
||
|
|
cancelable: true
|
||
|
|
});
|
||
|
|
} else if (self.dispatchEvent) {
|
||
|
|
event = document.createEvent("CustomEvent");
|
||
|
|
event.initCustomEvent(type, false, true, detail);
|
||
|
|
}
|
||
|
|
|
||
|
|
return event ? !self.dispatchEvent(event) : false;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
var toWindowMethodNameMap = {};
|
||
|
|
toWindowMethodNameMap["unhandledRejection"] = ("on" +
|
||
|
|
"unhandledRejection").toLowerCase();
|
||
|
|
toWindowMethodNameMap["rejectionHandled"] = ("on" +
|
||
|
|
"rejectionHandled").toLowerCase();
|
||
|
|
|
||
|
|
return function(name, reason, promise) {
|
||
|
|
var methodName = toWindowMethodNameMap[name];
|
||
|
|
var method = self[methodName];
|
||
|
|
if (!method) return false;
|
||
|
|
if (name === "rejectionHandled") {
|
||
|
|
method.call(self, promise);
|
||
|
|
} else {
|
||
|
|
method.call(self, reason, promise);
|
||
|
|
}
|
||
|
|
return true;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
})();
|
||
|
|
|
||
|
|
return CapturedTrace;
|
||
|
|
};
|