RFR(S) 8209361: [AOT] Unexpected number of references for JVMTI_HEAP_REFERENCE_CONSTANT_POOL [111-->111]: 0 (expected at least 1)

dean.long at oracle.com dean.long at oracle.com
Wed Sep 5 21:02:48 UTC 2018

Thanks Coleen.


On 9/5/18 1:29 PM, coleen.phillimore at oracle.com wrote:
> Looks good.
> Coleen
> On 8/30/18 8:20 PM, dean.long at oracle.com wrote:
>> https://bugs.openjdk.java.net/browse/JDK-8209361
>> http://cr.openjdk.java.net/~dlong/8209361/webrev/
>> Some JCK vm/jvmti/FollowReferences tests fail with AOT.  This is 
>> because code generated by JIT and AOT compilers might not resolve 
>> constant pool entries.  Making the compiled code resolve constant 
>> pool entries would hurt performance.  As far as I can tell, the JVMTI 
>> FollowReferences API is the only place this is visible, so I went 
>> with a localized fix.  The fix looks at unresolved constant pool 
>> entries and treats them as resolved if the class is loaded and 
>> accessible.  Some entries can appear to be resolved early, but this 
>> is allowed by the JVM spec, and it meets all the requirements of a 
>> resolved symbolic reference (it will always return the same concrete 
>> class value, JVM spec section 5.4.3).
>> dl

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