$ java -cp build Probe     (openjdk version "21.0.12.1" 2026-08-18, class file compiled by JDK 21)
got Unsafe instance
read back 42
allocate/put/get/free all succeeded
second use read 7

$ java --sun-misc-unsafe-memory-access=deny -cp build Probe     (openjdk version "21.0.12.1" 2026-08-18)
Unrecognized option: --sun-misc-unsafe-memory-access=deny
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

$ java -cp build Probe     (openjdk version "26.0.2.1" 2026-08-18)
got Unsafe instance
WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::allocateMemory has been called by Probe (file:<build>/c25/)
WARNING: Please consider reporting this to the maintainers of class Probe
...

$ java -cp build Probe     (openjdk version "27.0.1.0.2" 2026-10-21)
got Unsafe instance
WARNING: A terminally deprecated method in sun.misc.Unsafe has been called
WARNING: sun.misc.Unsafe::allocateMemory has been called by Probe (file:<build>/c25/)
WARNING: Please consider reporting this to the maintainers of class Probe
...