networkextension

ARMv8.3 Pointer Authentication in xnu

Introduction

This document describes xnu's use of the ARMv8.3-PAuth extension. Specifically, xnu uses ARMv8.3-PAuth to protect against Return-Oriented-Programming (ROP) and Jump-Oriented-Programming (JOP) attacks, which attempt to gain control flow over a victim program by overwriting return addresses or function pointers

IsaacXen

WWDC                                      2007  2008  2009
2010 2011 2012 2013 2014 2015 

bazad

// Brandon Azad (@_bazad)

#include <assert.h>
#include <errno.h>
#include <mach/mach.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

tclementdev

libdispatch efficiency tips

The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).

My take-aways are:

• You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.

• Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse

homebysix

10.3 (Panther):
https://swscan.apple.com/scanningpoints/scanningpointX.xml

10.4 (Tiger):
https://swscan.apple.com/content/catalogs/index.sucatalog
https://swscan.apple.com/content/catalogs/index-1.sucatalog

10.5 (Leopard):
https://swscan.apple.com/content/catalogs/others/index-leopard.merged-1.sucatalog

bazhenovc

/*
 * v8_wrap_class.cpp
 *
 *  Created on: 14/01/2013
 *      Author: nicholas
 *     License: public domain
 */

/* CMakeLists.txt
project(v8_wrap_class)

chrisbanes

/*
 * Copyright (C) 2014 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software

koenbok

var QcValueConverter = {
  tensionFromQcValue: function(qcValue) {
    return (qcValue - 30.0) * 3.62 + 194.0;
  },

  qcValueFromTension: function(tension) {
    return (tension - 194.0) / 3.62 + 30.0;
  },

  frictionFromQcValue: function(qcValue) {

dmh2000

#include <unistd.h>
#include <node.h>
#include <string.h>
#include <v8.h>

using namespace v8;

unsigned long long count = 0;

// native blocking/compute intensive function