RFR(M): 8006683: Add WhiteBox API to testing of compiler

[Igor Ignatyev]

> Why you need to pass -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI
> to javac (@compile)? javac usually uses Client VM so you will test
> different VM and it will be hard to diagnose it.

Because these flags are needed for adding wb.jar to classpath, w/o them 
javac could not find sun.hotspot.WhiteBox:

test/compiler/whitebox/MakeMethodNotCompilableTest.java:38: error: 
cannot access WhiteBox
         if (!WHITE_BOX.isMethodCompilable(METHOD)) {
                       ^
   class file for sun.hotspot.WhiteBox not found
1 error
result: Failed. Compilation failed: Compilation failed


> SetDontInlineMethodTest.java also have additional "-cp ./". Why?
my oversight

Best regards,
Igor Ignatyev

On 02/06/2013 06:17 AM, Vladimir Kozlov wrote:
> The directories and files layout is good.
>
> Why you need to pass -J-XX:+UnlockDiagnosticVMOptions -J-XX:+WhiteBoxAPI
> to javac (@compile)? javac usually uses Client VM so you will test
> different VM and it will be hard to diagnose it.
>
> SetDontInlineMethodTest.java also have additional "-cp ./". Why?
>
> Thanks,
> Vladimir
>
> On 2/5/13 9:37 AM, Igor Ignatyev wrote:
>> 1. added new functions:
>>      public native void    makeMethodNotCompilable(Method method);
>>      public native int     getMethodCompilationLevel(Method method);
>> 2. tests were moved to separate files in compiler/whitebox directory
>> 3. removed redundant '(value ? JNI_TRUE : JNI_FALSE)'
>>
>> webrev: http://cr.openjdk.java.net/~iignatyev/8006683/webrev.01/
>>
>> PS compiler/whitebox/IsMethodCompilableTest fails due to JDK-8007270
>>
>> On 01/31/2013 04:28 AM, Vladimir Kozlov wrote:
>>> On 1/30/13 4:12 PM, Igor Ignatyev wrote:
>>>> Vladimir, thank you for your feedback.
>>>>
>>>>> Could you also add call to get
>>>>> compilation level code->comp_level() of compiled code?
>>>> Add this is not a problem, but then we will need to have a copy of enum
>>>> 'CompLevel' in java code. Or you suggest to return int?
>>>
>>> Just int. And may be not for you current test but in one of next to
>>> check that we have expected comp_level (could be difficult with tiered).
>>>
>>>>
>>>>> Do we plan to add more WB tests later as separate *.java tests or we
>>>>> keep only one  CompilerWhiteBoxTest.java and update it?
>>>> I think it's better to write tests as separates file, because it will
>>>> allow not care about state of counters after previous tests.
>>>
>>> Could you then create subdir test/compiler/whitebox for this and future
>>> WB tests?
>>>
>>>>
>>>> During testing of my changes I have found strange behavior of compiler:
>>>> C1 continues compilation of method even after reaching of
>>>> recompilation's limit (PerMethodRecompilationCutoff). For C2 (w/o
>>>> Tiered) all is correct.
>>>>
>>>> Is this behavior correct? Or this is a bug?
>>>>
>>>> PS Cause of this behavior is calling of 'Method:: set_not_compilable()'
>>>> with argument 'CompLevel_full_optimization' from
>>>> 'MethodData::inc_decompile_count()', so for C1 the method is still
>>>> compilable.
>>>
>>> File bug. Recently we separated method not-compilable state for C1 and
>>> C2, and it is side effect (missed this place).
>>>
>>> Thanks,
>>> Vladimir
>>>
>>>>
>>>> Best regards,
>>>> Igor Ignatyev
>>>>
>>>> On 01/30/2013 11:53 PM, Vladimir Kozlov wrote:
>>>>> Igor,
>>>>>
>>>>> I agree with Mikael to give different name to test.
>>>>>
>>>>> Calls to get info in VM looks fine to me. Could you also add call to
>>>>> get
>>>>> compilation level code->comp_level() of compiled code?
>>>>>
>>>>> Do we plan to add more WB tests later as separate *.java tests or we
>>>>> keep only one  CompilerWhiteBoxTest.java and update it?
>>>>>
>>>>> Thanks,
>>>>> Vladimir
>>>>>
>>>>> On 1/29/13 12:31 PM, Igor Ignatyev wrote:
>>>>>> Hi all,
>>>>>>
>>>>>> Please review the patch
>>>>>>
>>>>>> 1. added new functions to WhiteBox:
>>>>>>    public native void    deoptimizeAll();
>>>>>>    public native boolean isMethodCompiled(Method method);
>>>>>>    public native boolean isMethodCompilable(Method method);
>>>>>>    public native boolean isMethodQueuedForCompilation(Method method);
>>>>>>    public native int     deoptimizeMethod(Method method);
>>>>>>    public native boolean setDontInlineMethod(Method method, boolean
>>>>>> value);
>>>>>>    public native int     getCompileQueuesSize();
>>>>>>
>>>>>> 2. added test 'test/compiler/WBApiTest.java' which exercises these
>>>>>> functions
>>>>>>
>>>>>> 3. added result type to macro WB_METHOD_DECLARE
>>>>>>
>>>>>> webrev: http://cr.openjdk.java.net/~vlivanov/8006683/webrev.00/