Value Types - Meet some issues during execution

[Maurizio Cimadamore]

Tried too with verify:none and got a dump. Frederic is looking into it.

Maurizio


On 24/10/16 17:28, Remi Forax wrote:
> Hi Maurizio,
> it seems the verifier has not been updated yet to cope with value type,
> in the example provided by Tobias, he is using -noverify to bypass the verifier,
> but it crashes we starting to run the interpreter.
>
> Maybe, there is a shiboleet [1] option to pass to the VM ?
>
> Rémi
> [1] https://xkcd.com/806/
>
> ----- Mail original -----
>> De: "Maurizio Cimadamore" <maurizio.cimadamore at oracle.com>
>> À: "GIACHERIO Fabien" <f.giacherio at gmail.com>, "Tobias Hartmann" <tobias.hartmann at oracle.com>,
>> valhalla-dev at openjdk.java.net
>> Envoyé: Lundi 24 Octobre 2016 16:16:36
>> Objet: Re: Value Types - Meet some issues during execution
>> I too get this:
>>
>> Error: A JNI error has occurred, please check your installation and try
>> again
>> Exception in thread "main" java.lang.ClassFormatError: Method "<vminit>"
>> in class Point has illegal signature "(II)QPoint;"
>>      at java.lang.ClassLoader.defineClass1(Native Method)
>>      at java.lang.ClassLoader.defineClass(ClassLoader.java:761)
>>      at java.lang.ClassLoader.defineClass(ClassLoader.java:837)
>>      at
>> java.security.SecureClassLoader.defineClass(SecureClassLoader.java:184)
>>      at java.net.URLClassLoader.defineClass(URLClassLoader.java:531)
>>      at java.net.URLClassLoader.access$200(URLClassLoader.java:84)
>>      at java.net.URLClassLoader$1.run(URLClassLoader.java:413)
>>      at java.net.URLClassLoader$1.run(URLClassLoader.java:395)
>>      at java.security.AccessController.doPrivileged(Native Method)
>>      at java.net.URLClassLoader.findClass(URLClassLoader.java:394)
>>      at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
>>      at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:262)
>>      at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
>>      at
>> sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:504)
>>
>>
>> I don't think this has to do with the JIT. Making the constructor public
>> didn't change the outcome.
>>
>> Maurizio
>>
>>
>>
>> On 24/10/16 14:56, GIACHERIO Fabien wrote:
>>> I tried to add the -Xint argument in order to disable compilation but it
>>> does not resolve the issue and the execution is still bugged.
>>>
>>> In the 'Minimal Value Types' document, It is say that : "Any use of any
>>> part of any feature of this prototype must originate from a class in a
>>> value-capable module".
>>> I guess my issue come from that. How can I add my class in a value-capable
>>> module ?
>>>
>>> Best regards,
>>> Fabien GIACHERIO.
>>>
>>> 2016-10-21 14:58 GMT+02:00 Tobias Hartmann <tobias.hartmann at oracle.com>:
>>>
>>>> Hi Fabien,
>>>>
>>>> the current value types prototype has still very limited JIT support (C2
>>>> only) and does not support all of the new vbytecodes and functionality yet.
>>>> For an example of what already works, please have a look at these tests:
>>>> http://hg.openjdk.java.net/valhalla/valhalla/hotspot/
>>>> file/tip/test/compiler/valhalla/valuetypes/ValueTypeTestBench.java
>>>> Especially calls on value types are not yet working.
>>>>
>>>> If you are experimenting with value types, it's best to disable
>>>> compilation for now (-Xint).
>>>>
>>>> I'm actively working on this and will constantly update the tests if new
>>>> functionality is added. I also plan to send a summary of the implementation
>>>> at some point.
>>>>
>>>> Best regards,
>>>> Tobias
>>>>
>>>> On 21.10.2016 14:48, GIACHERIO Fabien wrote:
>>>>> Hi everyone,
>>>>>
>>>>> I am currently working on value types and I am trying to execute an
>>>> example.
>>>>> I can compile the class below but I meet some issues when I try to
>>>> execute
>>>>> it even if I add these arguments :
>>>>> -noverify
>>>>> -XX:-TieredCompilation
>>>>> -XX:-BackgroundCompilation
>>>>> -XX:-UseOnStackReplacement
>>>>> -XX:CompileCommand=compileonly,Point::*
>>>>> -XX:+PrintCompilation
>>>>>
>>>>> Do you have any solution ? If so, would you tell me please.
>>>>>
>>>>> Here is my code :
>>>>> __ByValue final class Point{
>>>>>       final int x;
>>>>>       final int y;
>>>>>
>>>>>       private Point(int x, int y) {
>>>>>           this.x = x;
>>>>>           this.y = y;
>>>>>       }
>>>>>
>>>>>       public static void hello() {
>>>>>           Point origin = __Make Point(1,2);
>>>>>       }
>>>>>
>>>>>       public static void main(String[] args) {
>>>>>           hello();
>>>>>       }
>>>>> }
>>>>>
>>>>> Best Regards,
>>>>> Fabien GIACHERIO.