diff options
Diffstat (limited to 'tools/addon-sdk-1.12/lib/sdk/console/traceback.js')
-rw-r--r-- | tools/addon-sdk-1.12/lib/sdk/console/traceback.js | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/tools/addon-sdk-1.12/lib/sdk/console/traceback.js b/tools/addon-sdk-1.12/lib/sdk/console/traceback.js new file mode 100644 index 0000000..6b23be1 --- /dev/null +++ b/tools/addon-sdk-1.12/lib/sdk/console/traceback.js @@ -0,0 +1,118 @@ +/* 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/. */ + +"use strict"; + +module.metadata = { + "stability": "experimental" +}; + +const { Cc, Ci, components } = require("chrome"); +const { readURISync } = require("../net/url"); + +// Undo the auto-parentification of URLs done in bug 418356. +function deParentifyURL(url) { + return url ? url.split(" -> ").slice(-1)[0] : url; +} + +function safeGetFileLine(path, line) { + try { + var scheme = require("../url").URL(path).scheme; + // TODO: There should be an easier, more accurate way to figure out + // what's the case here. + if (!(scheme == "http" || scheme == "https")) + return readURISync(path).split("\n")[line - 1]; + } catch (e) {} + return null; +} + +function errorStackToJSON(stack) { + var lines = stack.split("\n"); + + var frames = []; + lines.forEach( + function(line) { + if (!line) + return; + var atIndex = line.indexOf("@"); + var colonIndex = line.lastIndexOf(":"); + var filename = deParentifyURL(line.slice(atIndex + 1, colonIndex)); + var lineNo = parseInt(line.slice(colonIndex + 1)); + var funcSig = line.slice(0, atIndex); + var endFuncName = funcSig.indexOf("("); + // Bug 751149: FF15 changed function signature + // Instead of: runTest([object Object]) + // We now have: runTest + var funcName = endFuncName != -1 + ? funcSig.slice(0, endFuncName) + : funcSig; + frames.unshift({filename: filename, + funcName: funcName, + lineNo: lineNo}); + }); + + return frames; +}; + +function nsIStackFramesToJSON(frame) { + var stack = []; + + while (frame) { + if (frame.filename) { + var filename = deParentifyURL(frame.filename); + stack.splice(0, 0, {filename: filename, + lineNo: frame.lineNumber, + funcName: frame.name}); + } + frame = frame.caller; + } + + return stack; +}; + +var fromException = exports.fromException = function fromException(e) { + if (e instanceof Ci.nsIException) + return nsIStackFramesToJSON(e.location); + if (e.stack && e.stack.length) + return errorStackToJSON(e.stack); + if (e.fileName && typeof(e.lineNumber == "number")) + return [{filename: deParentifyURL(e.fileName), + lineNo: e.lineNumber, + funcName: null}]; + return []; +}; + +var get = exports.get = function get() { + return nsIStackFramesToJSON(components.stack.caller); +}; + +var format = exports.format = function format(tbOrException) { + if (tbOrException === undefined) { + tbOrException = get(); + tbOrException.splice(-1, 1); + } + + var tb; + if (typeof(tbOrException) == "object" && + tbOrException.constructor.name == "Array") + tb = tbOrException; + else + tb = fromException(tbOrException); + + var lines = ["Traceback (most recent call last):"]; + + tb.forEach( + function(frame) { + if (!(frame.filename || frame.lineNo || frame.funcName)) + return; + + lines.push(' File "' + frame.filename + '", line ' + + frame.lineNo + ', in ' + frame.funcName); + var sourceLine = safeGetFileLine(frame.filename, frame.lineNo); + if (sourceLine) + lines.push(' ' + sourceLine.trim()); + }); + + return lines.join("\n"); +}; |