User relevant changes to the JamaicaVM tool chain

javax.realtime.control.AsynchronouslyInterruptedException is now implemented. New code should use the new class javax.realtime.control.AsynchronouslyInterruptedException instead of javax.realtime.AsynchronouslyInterruptedException.

javax.realtime.control.AsynchronousControlGroup and according asynchronous task termination is now implemented.

The JarAccelerator now warns about incomplete sealed packages which may hint at dead code or inconsistent packaging.

Jamaica now supports QNX 7.1.0 as a target platform.

Jamaica is now using posix_spawn() for ProcessBuilder functionality on QNX 7.

Jamaica now supports Linux on RISC-V as a target platform.

Jamaica is now shipped with OpenJDK’s root CA certificates based on jdk8u302.

Jamaica is now based on standard classes of OpenJDK version jdk8u302.

The fdlibm library used by Jamaica was updated to OpenJDK version jdk8u302.

The libffi bundled with Jamaica was updated to version 3.4.2.

The FreeType bundled with Jamaica was updated to version 2.11.1.

All file and network I/O operations on POSIX-based platforms are now interruptible by signals.

The Jamaica-specific API 'com.aicas.jamaica.lang.VMInterface.getTarget()' now correctly throws an OutOfMemoryError when invoked under low memory conditions.

The deprecated Builder option -setGraphics has been removed.

The option -setTimeslice no longer accepts '0' since it leads to unwanted behavior.

Fix JAM-8861: ProcessBuilder on QNX no longer occasionally fails with an IOException (bad file descriptor) during heavy loads.

Fix JAM-8809: The Builder no longer exits with an error message for an error that may happen at runtime when classes referenced through constant pool entries do not exist in the classpath.

Fix JAM-8219: Upon connecting to JamaicaVM with a Java Debugger (e.g. jdb) the main thread is again suspended in the real main method of the Java application instead of being suspended in "com.jamaicavm.jre.Main.main" method.

Fix JAM-8726: JamaicaVM can again detect native stack overflow.

Fix JAM-8683: The default implementation of JAXB is now included by the Builder automatically when the JAXB API is used.

Fix JAM-6547: sun.reflect.misc.ReflectUtil.isVMAnonymousClass now returns true for anonymous classes.

Fix JAM-8839: Fixed missing initialisation of particular internal structures.

Fix JAM-8706: Fixed occasional assertion failure in Scheduler for the debug singlecore VM.

Fix JAM-8520, JAM-8329, JAM-8251, JAM-8214, JAM-8213, JAM-8212, JAM-8211, JAM-8210, JAM-8184, JAM-7191 and JAM-6207: JamaicaVM now passes all RTSJ TCK AsynchronouslyInterruptedException tests.

Fix JAM-8525: RTSJ StackedMemory no longer discards exceptions on exit.

Fix JAM-8425 and JAM-7768: the RTSJ realtime clock no longer uses the Epoch as its epoch, so the realtime clock no longer requires any adjustments.

Fix JAM-8265 and JAM-7765: RTSJ problems with scope memory finalization.

Fix JAM-8132: Issuing the "threads" command in jdb when attached to the JamaicaVM does not result in a segmentation fault anymore if a thread group name of null exists.

Fix JAM-8705: The rt.jar no longer contains any invalid inner classes.

Fix JAM-8725: Remove classes with dangling class references related to the X Window System from the rt.jar.

Fix JAM-8754: The method getCommittedVirtualMemorySize of class sun.management.OperatingSystemMXBean is no longer prone to not returning at all or returning with an error on QNX platforms.