1 files changed, 148 insertions, 0 deletions
diff --git a/data/extensions/uBlock0@raymondhill.net/js/resources/stack-trace.js b/data/extensions/uBlock0@raymondhill.net/js/resources/stack-trace.js
new file mode 100644
index 0000000..c2e5358
--- /dev/null
+++ b/data/extensions/uBlock0@raymondhill.net/js/resources/stack-trace.js
@@ -0,0 +1,148 @@
+/*******************************************************************************
+
+    uBlock Origin - a comprehensive, efficient content blocker
+    Copyright (C) 2019-present Raymond Hill
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see {http://www.gnu.org/licenses/}.
+
+    Home: https://github.com/gorhill/uBlock
+
+*/
+
+import { getExceptionTokenFn } from './utils.js';
+import { registerScriptlet } from './base.js';
+import { safeSelf } from './safe-self.js';
+
+/******************************************************************************/
+
+export function matchesStackTraceFn(
+    needleDetails,
+    logLevel = ''
+) {
+    const safe = safeSelf();
+    const exceptionToken = getExceptionTokenFn();
+    const error = new safe.Error(exceptionToken);
+    const docURL = new URL(self.location.href);
+    docURL.hash = '';
+    // Normalize stack trace
+    const reLine = /(.*?@)?(\S+)(:\d+):\d+\)?$/;
+    const lines = [];
+    for ( let line of safe.String_split.call(error.stack, /[\n\r]+/) ) {
+        if ( line.includes(exceptionToken) ) { continue; }
+        line = line.trim();
+        const match = safe.RegExp_exec.call(reLine, line);
+        if ( match === null ) { continue; }
+        let url = match[2];
+        if ( url.startsWith('(') ) { url = url.slice(1); }
+        if ( url === docURL.href ) {
+            url = 'inlineScript';
+        } else if ( url.startsWith('<anonymous>') ) {
+            url = 'injectedScript';
+        }
+        let fn = match[1] !== undefined
+            ? match[1].slice(0, -1)
+            : line.slice(0, match.index).trim();
+        if ( fn.startsWith('at') ) { fn = fn.slice(2).trim(); }
+        let rowcol = match[3];
+        lines.push(' ' + `${fn} ${url}${rowcol}:1`.trim());
+    }
+    lines[0] = `stackDepth:${lines.length-1}`;
+    const stack = lines.join('\t');
+    const r = needleDetails.matchAll !== true &&
+        safe.testPattern(needleDetails, stack);
+    if (
+        logLevel === 'all' ||
+        logLevel === 'match' && r ||
+        logLevel === 'nomatch' && !r
+    ) {
+        safe.uboLog(stack.replace(/\t/g, '\n'));
+    }
+    return r;
+}
+registerScriptlet(matchesStackTraceFn, {
+    name: 'matches-stack-trace.fn',
+    dependencies: [
+        getExceptionTokenFn,
+        safeSelf,
+    ],
+});
+
+/******************************************************************************/
+
+function abortOnStackTrace(
+    chain = '',
+    needle = ''
+) {
+    if ( typeof chain !== 'string' ) { return; }
+    const safe = safeSelf();
+    const needleDetails = safe.initPattern(needle, { canNegate: true });
+    const extraArgs = safe.getExtraArgs(Array.from(arguments), 2);
+    if ( needle === '' ) { extraArgs.log = 'all'; }
+    const makeProxy = function(owner, chain) {
+        const pos = chain.indexOf('.');
+        if ( pos === -1 ) {
+            let v = owner[chain];
+            Object.defineProperty(owner, chain, {
+                get: function() {
+                    const log = safe.logLevel > 1 ? 'all' : 'match';
+                    if ( matchesStackTraceFn(needleDetails, log) ) {
+                        throw new ReferenceError(getExceptionTokenFn());
+                    }
+                    return v;
+                },
+                set: function(a) {
+                    const log = safe.logLevel > 1 ? 'all' : 'match';
+                    if ( matchesStackTraceFn(needleDetails, log) ) {
+                        throw new ReferenceError(getExceptionTokenFn());
+                    }
+                    v = a;
+                },
+            });
+            return;
+        }
+        const prop = chain.slice(0, pos);
+        let v = owner[prop];
+        chain = chain.slice(pos + 1);
+        if ( v ) {
+            makeProxy(v, chain);
+            return;
+        }
+        const desc = Object.getOwnPropertyDescriptor(owner, prop);
+        if ( desc && desc.set !== undefined ) { return; }
+        Object.defineProperty(owner, prop, {
+            get: function() { return v; },
+            set: function(a) {
+                v = a;
+                if ( a instanceof Object ) {
+                    makeProxy(a, chain);
+                }
+            }
+        });
+    };
+    const owner = window;
+    makeProxy(owner, chain);
+}
+registerScriptlet(abortOnStackTrace, {
+    name: 'abort-on-stack-trace.js',
+    aliases: [
+        'aost.js',
+    ],
+    dependencies: [
+        getExceptionTokenFn,
+        matchesStackTraceFn,
+        safeSelf,
+    ],
+});
+
+/******************************************************************************/