Execution problems with Atomic Operations on OpenJDK10 for ARM5 Soft Float

David Holmes david.holmes at oracle.com
Wed Apr 4 22:12:35 UTC 2018


Hi,

This was already reported as:

https://bugs.openjdk.java.net/browse/JDK-8200580

to which I have responded and closed the bug as this is not a supported 
platform.

As per the bug report this may be due to the change to AssumeMP to be 
true, but there is no MP support for ARMv5.

David

On 4/04/2018 8:29 PM, bren at juanantonio.info wrote:
> Good morning,
> 
> Mi name is Juan Antonio Breña Moral, I am developing a set of Java 
> libraries for Lego Mindstorms EV3, an ARM5 robotics device and recently, 
> we build OpenJDK 9 with success but with OpenJDK 10, we have found some 
> problems when we execute some Java programs.
> 
> Repository to build OpenJDK 9/10 for ARM5 Soft Float:
> https://github.com/ev3dev-lang-java/openjdk-ev3
> 
> To test the JVM, I am using the following repo to test the VM:
> https://github.com/ev3dev-lang-java/vmbenchmarks
> 
> And this is the output with the error:
> 
> robot at ev3dev:~$ java -jar benchmarks.jar -f 1
> WARNING: An illegal reflective access operation has occurred
> WARNING: Illegal reflective access by org.openjdk.jmh.util.Utils 
> (file:/home/robot/benchmarks.jar) to field java.io.Console.cs
> WARNING: Please consider reporting this to the maintainers of 
> org.openjdk.jmh.util.Utils
> WARNING: Use --illegal-access=warn to enable warnings of further illegal 
> reflective access operations
> WARNING: All illegal access operations will be denied in a future release
> =============== DEBUG MESSAGE: Atomic load(jlong) unsupported on this 
> platform ================
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> =============== DEBUG MESSAGE: Atomic load(jlong) unsupported on this 
> platform ================
> 
> [thread 4430 also had an error]
> [error occurred during error reporting ((null)), id 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing fatal error message), 
> id 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing type of error), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing stack bounds), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing native stack), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing Java stack), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing target Java thread 
> stack), id 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing siginfo), id 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (CDS archive access warning), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [error occurred during error reporting (printing register info), id 
> 0xe0000000]
> 
> =============== DEBUG MESSAGE: Atomic store(jlong) unsupported on this 
> platform ================
> 
> 
> [Too many errors, abort]
> Aborted
> 
> I think that in OpenJDK10 changed something in compare to OpenJDK9 in 
> relation to ARM5 support.
> 
> Any idea?
> 
> Many thanks in advance.
> 
> Cheers
> 
> Juan Antonio
> 


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