ByteBuffer considered not existing in JDK 22

[Michael Hall]

> On May 12, 2024, at 4:58 AM, Martin Pernollet <martin.pernollet at protonmail.com> wrote:
> 
> Hi,
> 
> Two additional useful information
> this happens with macOS JDK only (tried ARM but not x86). No problem with Windows and Linux
> I get the problem both from Eclipse and when building from command line with Maven :
I can’t recreate but I definitely notice a change

java -version
openjdk version "22.0.1" 2024-04-16
OpenJDK Runtime Environment (build 22.0.1

Installed and now jdk 22 is default.

outputdir/HalfPipe.app/Contents/MacOS/HalfPipe
Exception in thread "main" java.lang.UnsatisfiedLinkError: /Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/app/libhp.dylib: dlopen(/Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/app/libhp.dylib, 0x0001): tried: '/Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/app/libhp.dylib' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64')), '/System/Volumes/Preboot/Cryptexes/OS/Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/app/libhp.dylib' (no such file), '/Users/mjh/HalfPipe/HalfPipe_jpkg/outputdir/HalfPipe.app/Contents/app/libhp.dylib' (mach-o file, but is an incompatible architecture (have 'arm64', need 'x86_64'))

My app is broken on native lib access.

java -cp outputdir/HalfPipe.app/Contents/app/halfpipe.jar org.cmdline.cmds.showc java.nio.ByteBuffer 
java.lang.UnsupportedOperationException: The Security Manager is deprecated and will be removed in a future release
	at java.base/java.lang.System.setSecurityManager(System.java:431)
	at org.cmdline.psuedoGestalt.GestaltClasses.<clinit>(GestaltClasses.java:54)
	at org.cmdline.cmds.showc.main(showc.java:72)
showc: invoked with: java.nio.ByteBuffer
public abstract class java.nio.ByteBuffer extends java.nio.Buffer implements java.lang.Comparable {
 // Constructors
   java.nio.ByteBuffer(byte[], long, int, java.lang.foreign.MemorySegment);
   java.nio.ByteBuffer(int, int, int, int, java.lang.foreign.MemorySegment);
   java.nio.ByteBuffer(int, int, int, int, byte[], int, java.lang.foreign.MemorySegment);
 // Fields
   private static final long ARRAY_BASE_OFFSET;
…

I do find java.nio.ByteBuffer

java -cp outputdir/HalfPipe.app/Contents/app/halfpipe.jar set os.arch            
os.arch=x86_64

Java current architecture on my silicon machine?

/usr/libexec/java_home -v 21 --exec java -cp outputdir/HalfPipe.app/Contents/app/halfpipe.jar set os.arch    
os.arch=aarch64

The prior architecture where my application ran.

Why the change?


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