+++ /dev/null
-// Domain Public by Eric Wendelin http://eriwen.com/ (2008)
-// Luke Smith http://lucassmith.name/ (2008)
-// Loic Dachary <loic@dachary.org> (2008)
-// Johan Euphrosine <proppy@aminche.com> (2008)
-// Oyvind Sean Kinsey http://kinsey.no/blog (2010)
-// Victor Homyakov <victor-homyakov@users.sourceforge.net> (2010)
-
-/**
- * Main function giving a function stack trace with a forced or passed in Error
- *
- * @cfg {Error} e The error to create a stacktrace from (optional)
- * @cfg {Boolean} guess If we should try to resolve the names of anonymous functions
- * @return {Array} of Strings with functions, lines, files, and arguments where possible
- */
-function printStackTrace(options) {
- options = options || {guess: true};
- var ex = options.e || null, guess = !!options.guess;
- var p = new printStackTrace.implementation(), result = p.run(ex);
- return (guess) ? p.guessAnonymousFunctions(result) : result;
-}
-
-printStackTrace.implementation = function() {
-};
-
-printStackTrace.implementation.prototype = {
- /**
- * @param {Error} ex The error to create a stacktrace from (optional)
- * @param {String} mode Forced mode (optional, mostly for unit tests)
- */
- run: function(ex, mode) {
- ex = ex || this.createException();
- // examine exception properties w/o debugger
- //for (var prop in ex) {alert("Ex['" + prop + "']=" + ex[prop]);}
- mode = mode || this.mode(ex);
- if (mode === 'other') {
- return this.other(arguments.callee);
- } else {
- return this[mode](ex);
- }
- },
-
- createException: function() {
- try {
- this.undef();
- } catch (e) {
- return e;
- }
- },
-
- /**
- * Mode could differ for different exception, e.g.
- * exceptions in Chrome may or may not have arguments or stack.
- *
- * @return {String} mode of operation for the exception
- */
- mode: function(e) {
- if (e['arguments'] && e.stack) {
- return 'chrome';
- } else if (typeof e.message === 'string' && typeof window !== 'undefined' && window.opera) {
- // e.message.indexOf("Backtrace:") > -1 -> opera
- // !e.stacktrace -> opera
- if (!e.stacktrace) {
- return 'opera9'; // use e.message
- }
- // 'opera#sourceloc' in e -> opera9, opera10a
- if (e.message.indexOf('\n') > -1 && e.message.split('\n').length > e.stacktrace.split('\n').length) {
- return 'opera9'; // use e.message
- }
- // e.stacktrace && !e.stack -> opera10a
- if (!e.stack) {
- return 'opera10a'; // use e.stacktrace
- }
- // e.stacktrace && e.stack -> opera10b
- if (e.stacktrace.indexOf("called from line") < 0) {
- return 'opera10b'; // use e.stacktrace, format differs from 'opera10a'
- }
- // e.stacktrace && e.stack -> opera11
- return 'opera11'; // use e.stacktrace, format differs from 'opera10a', 'opera10b'
- } else if (e.stack) {
- return 'firefox';
- }
- return 'other';
- },
-
- /**
- * Given a context, function name, and callback function, overwrite it so that it calls
- * printStackTrace() first with a callback and then runs the rest of the body.
- *
- * @param {Object} context of execution (e.g. window)
- * @param {String} functionName to instrument
- * @param {Function} function to call with a stack trace on invocation
- */
- instrumentFunction: function(context, functionName, callback) {
- context = context || window;
- var original = context[functionName];
- context[functionName] = function instrumented() {
- callback.call(this, printStackTrace().slice(4));
- return context[functionName]._instrumented.apply(this, arguments);
- };
- context[functionName]._instrumented = original;
- },
-
- /**
- * Given a context and function name of a function that has been
- * instrumented, revert the function to it's original (non-instrumented)
- * state.
- *
- * @param {Object} context of execution (e.g. window)
- * @param {String} functionName to de-instrument
- */
- deinstrumentFunction: function(context, functionName) {
- if (context[functionName].constructor === Function &&
- context[functionName]._instrumented &&
- context[functionName]._instrumented.constructor === Function) {
- context[functionName] = context[functionName]._instrumented;
- }
- },
-
- /**
- * Given an Error object, return a formatted Array based on Chrome's stack string.
- *
- * @param e - Error object to inspect
- * @return Array<String> of function calls, files and line numbers
- */
- chrome: function(e) {
- var stack = (e.stack + '\n').replace(/^\S[^\(]+?[\n$]/gm, '').
- replace(/^\s+at\s+/gm, '').
- replace(/^([^\(]+?)([\n$])/gm, '{anonymous}()@$1$2').
- replace(/^Object.<anonymous>\s*\(([^\)]+)\)/gm, '{anonymous}()@$1').split('\n');
- stack.pop();
- return stack;
- },
-
- /**
- * Given an Error object, return a formatted Array based on Firefox's stack string.
- *
- * @param e - Error object to inspect
- * @return Array<String> of function calls, files and line numbers
- */
- firefox: function(e) {
- return e.stack.replace(/(?:\n@:0)?\s+$/m, '').replace(/^\(/gm, '{anonymous}(').split('\n');
- },
-
- opera11: function(e) {
- // "Error thrown at line 42, column 12 in <anonymous function>() in file://localhost/G:/js/stacktrace.js:\n"
- // "Error thrown at line 42, column 12 in <anonymous function: createException>() in file://localhost/G:/js/stacktrace.js:\n"
- // "called from line 7, column 4 in bar(n) in file://localhost/G:/js/test/functional/testcase1.html:\n"
- // "called from line 15, column 3 in file://localhost/G:/js/test/functional/testcase1.html:\n"
- var ANON = '{anonymous}', lineRE = /^.*line (\d+), column (\d+)(?: in (.+))? in (\S+):$/;
- var lines = e.stacktrace.split('\n'), result = [];
-
- for (var i = 0, len = lines.length; i < len; i += 2) {
- var match = lineRE.exec(lines[i]);
- if (match) {
- var location = match[4] + ':' + match[1] + ':' + match[2];
- var fnName = match[3] || "global code";
- fnName = fnName.replace(/<anonymous function: (\S+)>/, "$1").replace(/<anonymous function>/, ANON);
- result.push(fnName + '@' + location + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
- }
- }
-
- return result;
- },
-
- opera10b: function(e) {
- // "<anonymous function: run>([arguments not available])@file://localhost/G:/js/stacktrace.js:27\n" +
- // "printStackTrace([arguments not available])@file://localhost/G:/js/stacktrace.js:18\n" +
- // "@file://localhost/G:/js/test/functional/testcase1.html:15"
- var ANON = '{anonymous}', lineRE = /^(.*)@(.+):(\d+)$/;
- var lines = e.stacktrace.split('\n'), result = [];
-
- for (var i = 0, len = lines.length; i < len; i++) {
- var match = lineRE.exec(lines[i]);
- if (match) {
- var fnName = match[1]? (match[1] + '()') : "global code";
- result.push(fnName + '@' + match[2] + ':' + match[3]);
- }
- }
-
- return result;
- },
-
- /**
- * Given an Error object, return a formatted Array based on Opera 10's stacktrace string.
- *
- * @param e - Error object to inspect
- * @return Array<String> of function calls, files and line numbers
- */
- opera10a: function(e) {
- // " Line 27 of linked script file://localhost/G:/js/stacktrace.js\n"
- // " Line 11 of inline#1 script in file://localhost/G:/js/test/functional/testcase1.html: In function foo\n"
- var ANON = '{anonymous}', lineRE = /Line (\d+).*script (?:in )?(\S+)(?:: In function (\S+))?$/i;
- var lines = e.stacktrace.split('\n'), result = [];
-
- for (var i = 0, len = lines.length; i < len; i += 2) {
- var match = lineRE.exec(lines[i]);
- if (match) {
- var fnName = match[3] || ANON;
- result.push(fnName + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
- }
- }
-
- return result;
- },
-
- // Opera 7.x-9.2x only!
- opera9: function(e) {
- // " Line 43 of linked script file://localhost/G:/js/stacktrace.js\n"
- // " Line 7 of inline#1 script in file://localhost/G:/js/test/functional/testcase1.html\n"
- var ANON = '{anonymous}', lineRE = /Line (\d+).*script (?:in )?(\S+)/i;
- var lines = e.message.split('\n'), result = [];
-
- for (var i = 2, len = lines.length; i < len; i += 2) {
- var match = lineRE.exec(lines[i]);
- if (match) {
- result.push(ANON + '()@' + match[2] + ':' + match[1] + ' -- ' + lines[i + 1].replace(/^\s+/, ''));
- }
- }
-
- return result;
- },
-
- // Safari, IE, and others
- other: function(curr) {
- var ANON = '{anonymous}', fnRE = /function\s*([\w\-$]+)?\s*\(/i, stack = [], fn, args, maxStackSize = 10;
- while (curr && stack.length < maxStackSize) {
- fn = fnRE.test(curr.toString()) ? RegExp.$1 || ANON : ANON;
- args = Array.prototype.slice.call(curr['arguments'] || []);
- stack[stack.length] = fn + '(' + this.stringifyArguments(args) + ')';
- curr = curr.caller;
- }
- return stack;
- },
-
- /**
- * Given arguments array as a String, subsituting type names for non-string types.
- *
- * @param {Arguments} object
- * @return {Array} of Strings with stringified arguments
- */
- stringifyArguments: function(args) {
- var result = [];
- var slice = Array.prototype.slice;
- for (var i = 0; i < args.length; ++i) {
- var arg = args[i];
- if (arg === undefined) {
- result[i] = 'undefined';
- } else if (arg === null) {
- result[i] = 'null';
- } else if (arg.constructor) {
- if (arg.constructor === Array) {
- if (arg.length < 3) {
- result[i] = '[' + this.stringifyArguments(arg) + ']';
- } else {
- result[i] = '[' + this.stringifyArguments(slice.call(arg, 0, 1)) + '...' + this.stringifyArguments(slice.call(arg, -1)) + ']';
- }
- } else if (arg.constructor === Object) {
- result[i] = '#object';
- } else if (arg.constructor === Function) {
- result[i] = '#function';
- } else if (arg.constructor === String) {
- result[i] = '"' + arg + '"';
- } else if (arg.constructor === Number) {
- result[i] = arg;
- }
- }
- }
- return result.join(',');
- },
-
- sourceCache: {},
-
- /**
- * @return the text from a given URL
- */
- ajax: function(url) {
- var req = this.createXMLHTTPObject();
- if (req) {
- try {
- req.open('GET', url, false);
- req.send(null);
- return req.responseText;
- } catch (e) {
- }
- }
- return '';
- },
-
- /**
- * Try XHR methods in order and store XHR factory.
- *
- * @return <Function> XHR function or equivalent
- */
- createXMLHTTPObject: function() {
- var xmlhttp, XMLHttpFactories = [
- function() {
- return new XMLHttpRequest();
- }, function() {
- return new ActiveXObject('Msxml2.XMLHTTP');
- }, function() {
- return new ActiveXObject('Msxml3.XMLHTTP');
- }, function() {
- return new ActiveXObject('Microsoft.XMLHTTP');
- }
- ];
- for (var i = 0; i < XMLHttpFactories.length; i++) {
- try {
- xmlhttp = XMLHttpFactories[i]();
- // Use memoization to cache the factory
- this.createXMLHTTPObject = XMLHttpFactories[i];
- return xmlhttp;
- } catch (e) {
- }
- }
- },
-
- /**
- * Given a URL, check if it is in the same domain (so we can get the source
- * via Ajax).
- *
- * @param url <String> source url
- * @return False if we need a cross-domain request
- */
- isSameDomain: function(url) {
- return url.indexOf(location.hostname) !== -1;
- },
-
- /**
- * Get source code from given URL if in the same domain.
- *
- * @param url <String> JS source URL
- * @return <Array> Array of source code lines
- */
- getSource: function(url) {
- // TODO reuse source from script tags?
- if (!(url in this.sourceCache)) {
- this.sourceCache[url] = this.ajax(url).split('\n');
- }
- return this.sourceCache[url];
- },
-
- guessAnonymousFunctions: function(stack) {
- for (var i = 0; i < stack.length; ++i) {
- var reStack = /\{anonymous\}\(.*\)@(.*)/,
- reRef = /^(.*?)(?::(\d+))(?::(\d+))?(?: -- .+)?$/,
- frame = stack[i], ref = reStack.exec(frame);
-
- if (ref) {
- var m = reRef.exec(ref[1]), file = m[1],
- lineno = m[2], charno = m[3] || 0;
- if (file && this.isSameDomain(file) && lineno) {
- var functionName = this.guessAnonymousFunction(file, lineno, charno);
- stack[i] = frame.replace('{anonymous}', functionName);
- }
- }
- }
- return stack;
- },
-
- guessAnonymousFunction: function(url, lineNo, charNo) {
- var ret;
- try {
- ret = this.findFunctionName(this.getSource(url), lineNo);
- } catch (e) {
- ret = 'getSource failed with url: ' + url + ', exception: ' + e.toString();
- }
- return ret;
- },
-
- findFunctionName: function(source, lineNo) {
- // FIXME findFunctionName fails for compressed source
- // (more than one function on the same line)
- // TODO use captured args
- // function {name}({args}) m[1]=name m[2]=args
- var reFunctionDeclaration = /function\s+([^(]*?)\s*\(([^)]*)\)/;
- // {name} = function ({args}) TODO args capture
- // /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*function(?:[^(]*)/
- var reFunctionExpression = /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*function\b/;
- // {name} = eval()
- var reFunctionEvaluation = /['"]?([0-9A-Za-z_]+)['"]?\s*[:=]\s*(?:eval|new Function)\b/;
- // Walk backwards in the source lines until we find
- // the line which matches one of the patterns above
- var code = "", line, maxLines = Math.min(lineNo, 20), m, commentPos;
- for (var i = 0; i < maxLines; ++i) {
- // lineNo is 1-based, source[] is 0-based
- line = source[lineNo - i - 1];
- commentPos = line.indexOf('//');
- if (commentPos >= 0) {
- line = line.substr(0, commentPos);
- }
- // TODO check other types of comments? Commented code may lead to false positive
- if (line) {
- code = line + code;
- m = reFunctionExpression.exec(code);
- if (m && m[1]) {
- return m[1];
- }
- m = reFunctionDeclaration.exec(code);
- if (m && m[1]) {
- //return m[1] + "(" + (m[2] || "") + ")";
- return m[1];
- }
- m = reFunctionEvaluation.exec(code);
- if (m && m[1]) {
- return m[1];
- }
- }
- }
- return '(?)';
- }
-};
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