CRITICAL NIO FLAW FOUND And I did the leg work again here and put in ~4 hours to reduce the bug to a most fundamental example that should be a unit test in Android. That it is not and this bug made it to production / shipping is amazing.
On all Java platforms 1.4, 5.0, 6.0 and Android OS version 1.0 - 2.3 the value of index 1 of buffer & buffer2 is 0x10000 (65535). On Android 3.0 / Honeycomb index 1 of buffer is 65535 and buffer 2 is 256.. Clearly a major if not critical flaw in Honeycomb for usage of the NIO API and calling duplicate() on a Buffer. Any code using NIO and duplicate() will likely break on Honeycomb. Being that this is a critical flaw.. Do you guys offer rewards or is that only security flaws? I'll take my $1,337 check or a Google I/O ticket. You guys do understand that the 4 hours I did to reduce this critical bug to an easily demonstrable level I'd charge more than a Google I/O ticket on an invoice. To run on Android simply call com.egrsoftware.niotest.NIOTest.test() from onCreate() of any Activity and check system output via adb logcat or ddms. -------------------------------------------------------------------------------------- package com.egrsoftware.niotest; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.IntBuffer; /** * NIOTest - Extremely simple unit test that Google should include in Android because it catches a bug in NIO that is * found in Android 3.0 / Honeycomb. This is a really nefarious bug as the affected code could be networking code, any * native JNI code, or in my case 3D rendering via the Android OpenGL ES API. Any code using NIO and "duplicate()" is * broken. * * On all Java platforms with NIO and Android versions 1.0 to 2.3 both buffers should print out 65535. On Android / * Honeycomb the 1st value in buffer 1 is 65535 and buffer 2 is 256!!!! Clearly a bug that any simple unit testing * should have found. This bug affects _ALL_ code that uses the NIO duplicate() method on a Buffer. The fall out of * this is immense! This is a critical bug! */ public class NIOTest { private static int s_SIZE_OF_INT = 4; public static void test() { IntBuffer buffer = ByteBuffer.allocateDirect(1 * s_SIZE_OF_INT).order( ByteOrder.nativeOrder()).asIntBuffer(); IntBuffer buffer2 = ByteBuffer.allocateDirect(1 * s_SIZE_OF_INT).order( ByteOrder.nativeOrder()).asIntBuffer(); IntBuffer bufferWrite2 = buffer2.duplicate(); buffer.put(0, 0x10000); //put 65535 bufferWrite2.put(0, 0x10000); System.err.println("NIOTest ----------"); System.err.println("buffer.get(): " +buffer.get()); System.err.println("buffer2.get(): " +buffer2.get()); } public static void main(String args[]) { test(); } } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en