RFR(M): 8057043: Type annotations not retained during class redefine / retransform

Andreas Eriksson andreas.eriksson at oracle.com
Tue Oct 21 12:55:10 UTC 2014


Thanks Joel!

/Andreas

On 2014-10-20 20:48, Joel Borggrén-Franck wrote:
> Sorry for the delay, looks good Andreas!
>
> Thanks for fixing this.
>
> cheers
> /Joel
>
> On 16 okt 2014, at 13:19, Andreas Eriksson <andreas.eriksson at oracle.com> wrote:
>
>> On 2014-10-15 15:47, Daniel D. Daugherty wrote:
>>> On 10/15/14 7:34 AM, Coleen Phillimore wrote:
>>>> There are lots of other rewrite_cp_refs_in* function calls. Please indent your function like them, not differently.
>>> The above implies that my answer below was made without sufficient
>>> context... my apologies for that.
>>>
>>> The general rule is to follow the existing style in the file so
>>> if there are rewrite_cp_refs_in* function calls in the file, then
>>> please follow that style. Unless, of course, you want to fix all
>>> of them to follow the HotSpot style guideline:
>>>
>>>     https://wiki.openjdk.java.net/display/HotSpot/StyleGuide
>>>
>>>     > Use good taste to break lines and align corresponding tokens
>>>     > on adjacent lines.
>>>
>>> but that may cause Coleen some heartburn :-)
>> I fixed the calls to follow the already existing indent style.
>> I have also made changes to the test, which I hope Joel can take a look at.
>>
>> New webrev:
>> http://cr.openjdk.java.net/~aeriksso/8057043/webrev.01/
>>
>> Thanks,
>> Andreas
>>
>>> Dan
>>>
>>>
>>>> Coleen
>>>>
>>>> On 10/15/14, 9:05 AM, Daniel D. Daugherty wrote:
>>>>> On 10/15/14 5:22 AM, Andreas Eriksson wrote:
>>>>>> Thanks Serguei.
>>>>>>
>>>>>> I have a question about the if-blocks that had the wrong indent:
>>>>>>
>>>>>> 2335     if (!rewrite_cp_refs_in_type_annotations_typeArray(method_type_annotations,
>>>>>> 2336           byte_i, "method_info", THREAD)) {
>>>>>>
>>>>>> How should I indent them?
>>>>> Trying again without the line numbers...
>>>>>
>>>>>   if (!rewrite_cp_refs_in_type_annotations_typeArray(method_type_annotations,
>>>>>                                                      byte_i, "method_info",
>>>>>                                                      THREAD)) {
>>>>>
>>>>> Just in case, TB messes with the spacing again, the "byte_i" line and
>>>>> "THREAD" lines are aligned under "method_type_annotations".
>>>>>
>>>>> Dan
>>>>>
>>>>>
>>>>>> /Andreas
>>>>>>
>>>>>> On 2014-10-15 07:00, serguei.spitsyn at oracle.com wrote:
>>>>>>> Hi Andreas,
>>>>>>>
>>>>>>> Sorry I did not reply on this early.
>>>>>>> I assumed, it is a thumbs up from me.
>>>>>>> Just wanted make it clean now. :)
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Serguei
>>>>>>>
>>>>>>> On 10/13/14 3:09 AM, Andreas Eriksson wrote:
>>>>>>>> Hi Serguei, thanks for looking at this!
>>>>>>>>
>>>>>>>> I'll make sure to fix the style problems.
>>>>>>>> For the symbolic names / #defines, please see my answer to Coleen.
>>>>>>>>
>>>>>>>> Regards,
>>>>>>>> Andreas
>>>>>>>>
>>>>>>>> On 2014-10-11 12:37, serguei.spitsyn at oracle.com wrote:
>>>>>>>>> Hi Andreas,
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Thank you for fixing this issue!
>>>>>>>>> The fix looks nice, I do not see any logical issues.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Only minor comments...
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> src/share/vm/prims/jvmtiRedefineClasses.cpp
>>>>>>>>>
>>>>>>>>> 2281 } // end rewrite_cp_refs_in_class_type_annotations(
>>>>>>>>> 2315 } // end rewrite_cp_refs_in_fields_type_annotations(
>>>>>>>>> 2345 } // end rewrite_cp_refs_in_methods_type_annotations()
>>>>>>>>> 2397 } // end rewrite_cp_refs_in_type_annotations_typeArray
>>>>>>>>> 2443 } // end rewrite_cp_refs_in_type_annotation_struct
>>>>>>>>> 2785 } // end skip_type_annotation_target
>>>>>>>>> 2844 } // end skip_type_annotation_type_path
>>>>>>>>>
>>>>>>>>> The ')' is missed at 2281, 2315.
>>>>>>>>> The 2397-2844 are inconsistent with the 2345 and other function-end comments in the file.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> 2335     if (!rewrite_cp_refs_in_type_annotations_typeArray(method_type_annotations,
>>>>>>>>> 2336           byte_i, "method_info", THREAD)) {
>>>>>>>>> . . .
>>>>>>>>> 2378     if (!rewrite_cp_refs_in_type_annotation_struct(type_annotations_typeArray,
>>>>>>>>> 2379            byte_i_ref, location_mesg, THREAD)) {
>>>>>>>>> . . .
>>>>>>>>> 2427   if (!skip_type_annotation_target(type_annotations_typeArray,
>>>>>>>>> 2428         byte_i_ref, location_mesg, THREAD)) {
>>>>>>>>> 2429     return false;
>>>>>>>>> 2430   }
>>>>>>>>> 2431
>>>>>>>>> 2432   if (!skip_type_annotation_type_path(type_annotations_typeArray,
>>>>>>>>> 2433         byte_i_ref, THREAD)) {
>>>>>>>>> 2434     return false;
>>>>>>>>> 2435   }
>>>>>>>>> 2436
>>>>>>>>> 2437   if (!rewrite_cp_refs_in_annotation_struct(type_annotations_typeArray,
>>>>>>>>> 2438          byte_i_ref, THREAD)) {
>>>>>>>>> 2439     return false;
>>>>>>>>> Wrong indent at 2336, 2379, etc.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I also concur with Coleen that it would be good to define and use
>>>>>>>>> symbolic names for the hexa-decimal constants used in the fix.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> test/runtime/RedefineTests/RedefineAnnotations.java
>>>>>>>>>
>>>>>>>>>   Java indent must be 4, not 2.
>>>>>>>>>
>>>>>>>>>   253       @TestAnn(site="returnTypeAnnotation") Class typeAnnotatedMethod(@TestAnn(site="formalParameterTypeAnnotation") TypeAnnotatedTestClass arg)
>>>>>>>>>
>>>>>>>>> The line is too long.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>   143   }
>>>>>>>>>   144   public static void main(String argv[]) {
>>>>>>>>>   . . .
>>>>>>>>>   209   }
>>>>>>>>>   210   private static void checkAnnotations(AnnotatedType p) {
>>>>>>>>>   211     checkAnnotations(p.getAnnotations());
>>>>>>>>>   212   }
>>>>>>>>>   213   private static void checkAnnotations(AnnotatedType[] annoTypes) {
>>>>>>>>>   214     for (AnnotatedType p : annoTypes) checkAnnotations(p.getAnnotations());
>>>>>>>>>   215   }
>>>>>>>>>   216   private static void checkAnnotations(Class<TypeAnnotatedTestClass> c) {
>>>>>>>>>   . . .
>>>>>>>>>   257       }
>>>>>>>>>   258       public void run() {}
>>>>>>>>>
>>>>>>>>>    Adding empty lines between method definitions would improve readability.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Thanks,
>>>>>>>>> Serguei
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> On 10/9/14 6:21 AM, Andreas Eriksson wrote:
>>>>>>>>>> Hi all,
>>>>>>>>>>
>>>>>>>>>> Please review this patch to RedefineClasses to allow type annotations to be preserved.
>>>>>>>>>>
>>>>>>>>>> Summary:
>>>>>>>>>> During redefine / retransform class the constant pool indexes can change.
>>>>>>>>>> Since annotations have indexes into the constant pool these indexes need to be rewritten.
>>>>>>>>>> This is already done for regular annotations, but not for type annotations.
>>>>>>>>>> This patch adds code to add this rewriting for the type annotations as well.
>>>>>>>>>> The patch also contains minor changes to ClassFileReconstituter, to make sure that type annotations are preserved during a redefine / retransform class operation.
>>>>>>>>>> It also has a test that uses asm to change constant pool indexes through a retransform, and then verifies that type annotations are preserved.
>>>>>>>>>>
>>>>>>>>>> Detail:
>>>>>>>>>> A type annotation struct consists of some target information and a type path, followed by a regular annotation struct.
>>>>>>>>>> Constant pool indexes are only present in the regular annotation struct.
>>>>>>>>>> The added code skips over the type annotation specific parts, then calls previously existing code to rewrite constant pool indexes in the regular annotation struct.
>>>>>>>>>> Please see the Java SE 8 Ed. VM Spec. section 4.7.20 for more info about the type annotation struct.
>>>>>>>>>>
>>>>>>>>>> JPRT with the new test passes without failures on all platforms.
>>>>>>>>>>
>>>>>>>>>> Webrev:
>>>>>>>>>> http://cr.openjdk.java.net/~aeriksso/8057043/webrev.00/
>>>>>>>>>>
>>>>>>>>>> Bug:
>>>>>>>>>> https://bugs.openjdk.java.net/browse/JDK-8057043
>>>>>>>>>>
>>>>>>>>>> Regards
>>>>>>>>>> Andreas



More information about the hotspot-dev mailing list