[Nestmates] RFR: 8194856: [Nestmates] Activate nestmate processing for JDK Version 11 only

[David Holmes]

Thanks Maurizio.

David

On 15/01/2018 11:15 PM, Maurizio Cimadamore wrote:
> Javac changes look good - thanks
> 
> Maurizio
> 
> 
> On 15/01/18 03:57, David Holmes wrote:
>> Trivial update:
>> - javac: only generate nestmate attributes and virtual invoke 
>> bytecodes for private methods, when outputting for JDK 11 / classfile 
>> version 55
>> - hotspot: only read nestmate attributes if classfile version >= 55 
>> (JDK 11)
>>
>> bug: https://bugs.openjdk.java.net/browse/JDK-8194856
>> webrev: http://cr.openjdk.java.net/~dholmes/8194856/webrev/
>>
>> Thanks,
>> David
>> -----
>>
>> --- old/src/hotspot/share/classfile/classFileParser.cpp 2018-01-14 
>> 22:35:12.386673245 -0500
>> +++ new/src/hotspot/share/classfile/classFileParser.cpp 2018-01-14 
>> 22:35:10.230549972 -0500
>> @@ -3469,7 +3469,7 @@
>>            assert(runtime_invisible_type_annotations != NULL, "null 
>> invisible type annotations");
>>          }
>>          cfs->skip_u1(attribute_length, CHECK);
>> -      } else if (_major_version >= JAVA_10_VERSION) {
>> +      } else if (_major_version >= JAVA_11_VERSION) {
>>          if (tag == vmSymbols::tag_nest_members()) {
>>            // Check for NestMembers tag
>>            if (parsed_nest_members_attribute) {
>> --- 
>> old/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java 
>> 2018-01-14 22:35:19.063054956 -0500
>> +++ 
>> new/src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Target.java 
>> 2018-01-14 22:35:16.894930997 -0500
>> @@ -1,5 +1,5 @@
>>  /*
>> - * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights 
>> reserved.
>> + * Copyright (c) 2002, 2018, Oracle and/or its affiliates. All rights 
>> reserved.
>>   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
>>   *
>>   * This code is free software; you can redistribute it and/or modify it
>> @@ -158,13 +158,13 @@
>>      /** Does the target VM support nestmate access?
>>       */
>>      public boolean hasNestmateAccess() {
>> -        return compareTo(JDK1_10) >= 0;
>> +        return compareTo(JDK1_11) >= 0;
>>      }
>>
>>      /** Does the target VM support virtual private invocations?
>>       */
>>      public boolean hasVirtualPrivateInvoke() {
>> -        return compareTo(JDK1_10) >= 0;
>> +        return compareTo(JDK1_11) >= 0;
>>      }
>>
>>  }
>