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/*
* Copyright (C) 2015 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
WI.StackTrace = class StackTrace
{
constructor(callFrames, {topCallFrameIsBoundary, truncated, parentStackTrace} = {})
{
console.assert(callFrames.every((callFrame) => callFrame instanceof WI.CallFrame), callFrames);
console.assert(!parentStackTrace || parentStackTrace instanceof WI.StackTrace, parentStackTrace);
this._callFrames = callFrames;
this._topCallFrameIsBoundary = topCallFrameIsBoundary || false;
this._truncated = truncated || false;
this._parentStackTrace = parentStackTrace || null;
}
// Static
static fromPayload(target, payload)
{
let result = null;
let previousStackTrace = null;
while (payload) {
let callFrames = payload.callFrames.map((x) => WI.CallFrame.fromPayload(target, x));
let stackTrace = new WI.StackTrace(callFrames, {
topCallFrameIsBoundary: payload.topCallFrameIsBoundary,
truncated: payload.truncated,
});
if (!result)
result = stackTrace;
if (previousStackTrace)
previousStackTrace._parentStackTrace = stackTrace;
previousStackTrace = stackTrace;
payload = payload.parentStackTrace;
}
return result;
}
static fromString(target, stack)
{
let callFrames = WI.StackTrace._parseStackTrace(stack);
return WI.StackTrace.fromPayload(target, {callFrames});
}
// May produce false negatives; must not produce any false positives.
// It may return false on a valid stack trace, but it will never return true on an invalid stack trace.
static isLikelyStackTrace(stack)
{
// This function runs for every logged string. It penalizes the performance.
// As most logged strings are not stack traces, exit as early as possible.
const smallestPossibleStackTraceLength = "http://a.bc/:9:1".length;
if (stack.length < smallestPossibleStackTraceLength.length * 2)
return false;
const approximateStackLengthOf50Items = 5000;
if (stack.length > approximateStackLengthOf50Items)
return false;
if (/^[^a-z$_@]/i.test(stack[0]))
return false;
if (!WI.StackTrace._likelyStackTraceRegex) {
const reasonablyLongProtocolLength = 10;
const reasonablyLongLineLength = 500;
const reasonablyLongNativeMethodLength = 120;
const stackTraceLine = `(global code|eval code|module code|\\w+)?([^:]{1,${reasonablyLongProtocolLength}}://[^:]{1,${reasonablyLongLineLength}}:\\d+:\\d+|[^@]{1,${reasonablyLongNativeMethodLength}}@\\[native code\\])`;
WI.StackTrace._likelyStackTraceRegex = new RegExp(`^${stackTraceLine}([\\n\\r]${stackTraceLine})+$`);
}
WI.StackTrace._likelyStackTraceRegex.lastIndex = 0;
return WI.StackTrace._likelyStackTraceRegex.test(stack);
}
static _parseStackTrace(stack)
{
var lines = stack.split(/\n/g);
var result = [];
for (var line of lines) {
var functionName = "";
var url = "";
var lineNumber = 0;
var columnNumber = 0;
var atIndex = line.indexOf("@");
if (atIndex !== -1) {
functionName = line.slice(0, atIndex);
({url, lineNumber, columnNumber} = WI.StackTrace._parseLocation(line.slice(atIndex + 1)));
} else if (line.includes("/"))
({url, lineNumber, columnNumber} = WI.StackTrace._parseLocation(line));
else
functionName = line;
result.push({functionName, url, lineNumber, columnNumber});
}
return result;
}
static _parseLocation(locationString)
{
var result = {url: "", lineNumber: 0, columnNumber: 0};
var locationRegEx = /(.+?)(?::(\d+)(?::(\d+))?)?$/;
var matched = locationString.match(locationRegEx);
if (!matched)
return result;
result.url = matched[1];
if (matched[2])
result.lineNumber = parseInt(matched[2]);
if (matched[3])
result.columnNumber = parseInt(matched[3]);
return result;
}
// Public
get callFrames() { return this._callFrames; }
get topCallFrameIsBoundary() { return this._topCallFrameIsBoundary; }
get truncated() { return this._truncated; }
get parentStackTrace() { return this._parentStackTrace; }
get firstNonNativeNonAnonymousNotBlackboxedCallFrame()
{
let firstNonNativeNonAnonymousCallFrame = null;
for (let frame of this._callFrames) {
if (frame.nativeCode)
continue;
if (frame.sourceCodeLocation) {
let sourceCode = frame.sourceCodeLocation.sourceCode;
if (sourceCode instanceof WI.Script && sourceCode.anonymous)
continue;
// Save the first non-native non-anonymous call frame so it can be used as a
// fallback if all remaining call frames are blackboxed.
firstNonNativeNonAnonymousCallFrame ??= frame;
}
if (frame.blackboxed)
continue;
return frame;
}
return firstNonNativeNonAnonymousCallFrame;
}
};
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