jdk15+26: MethodHandles.collectReturnValue and others.. methods missing

[andrew-m-leonard]

jdk-15+26 merge fails to build:

/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:392: error: cannot find symbol
                        case GET -> MethodHandles.collectReturnValue(modeHandle, filterFromTarget);
                                                 ^
  symbol:   method collectReturnValue(MethodHandle,MethodHandle)
  location: class MethodHandles
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:395: error: cannot find symbol
                            MethodHandle adapter = MethodHandles.collectReturnValue(modeHandle, filterFromTarget);
                                                                ^
  symbol:   method collectReturnValue(MethodHandle,MethodHandle)
  location: class MethodHandles
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:405: error: cannot find symbol
                            MethodHandle adapter = MethodHandles.collectReturnValue(modeHandle, filterFromTarget);
                                                                ^
  symbol:   method collectReturnValue(MethodHandle,MethodHandle)
  location: class MethodHandles
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:599: error: cannot find symbol
            byte refKind = directHandle.member.getReferenceKind();
                                       ^
  symbol:   variable member
  location: variable directHandle of type DirectMethodHandle
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:600: error: cannot access InfoFromMemberName
            MethodHandleInfo info = new InfoFromMemberName(
                                        ^
  bad source file: /home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/build/linux-x86_64-server-release/support/j9jcl_sources/java.base/share/classes/java/lang/invoke/InfoFromMemberName.java
    file does not contain class java.lang.invoke.InfoFromMemberName
    Please remove or make sure it appears in the correct subdirectory of the sourcepath.
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:602: error: cannot find symbol
                    directHandle.member,
                                ^
  symbol:   variable member
  location: variable directHandle of type DirectMethodHandle
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:605: error: cannot find symbol
            if (MethodHandleNatives.refKindIsMethod(refKind)) {
                                   ^
  symbol:   method refKindIsMethod(byte)
  location: class MethodHandleNatives
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:608: error: cannot find symbol
            } else if (MethodHandleNatives.refKindIsField(refKind)) {
                                          ^
  symbol:   method refKindIsField(byte)
  location: class MethodHandleNatives
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/java/lang/invoke/VarHandles.java:610: error: cannot find symbol
            } else if (MethodHandleNatives.refKindIsConstructor(refKind)) {
                                          ^
  symbol:   method refKindIsConstructor(byte)
  location: class MethodHandleNatives
/home/admin/mydocker/ccm/openjdk-build/mergescripts/merge_tmp/src/java.base/share/classes/jdk/internal/access/SharedSecrets.java:354: error: cannot find symbol
            MethodHandles.lookup().ensureInitialized(c);
                                  ^
  symbol:   method ensureInitialized(Class<CAP#1>)
  location: class Lookup
  where CAP#1 is a fresh type-variable:
    CAP#1 extends Object from capture of ?

[pshipton]

@DanHeidinga

[DanHeidinga]

@babsingh Can you confirm if these are related to the Foreign memory JEP updates (preview 2) you were looking at?

If they are, can we get them stubbed to throw an exception so we can import the next jdk15 version?

[pshipton]

Note the jdk15 acceptance build is disabled, blocked by #9771, so even with stubs that allow the openj9-staging code to compile, we won't be "import[ing] the next jdk15 version" before resolving that.

[babsingh]

Can you confirm if these are related to the Foreign memory JEP updates (preview 2) you were looking at?

Yes, these are related to the Foreign memory JEP updates (preview 2). They were introduced last week in the below commit. I will prepare stubs for them.

commit 850f9aa9fd95b7ae45f2ce64ccb49b24f7faa44a
Author: mcimadamore <unknown>
Date:   Wed Jun 3 16:50:03 2020 +0100

    8246095: Tweaks to memory access API
    Summary: Add more user friendly API points to the foreign memory acesss API
    Reviewed-by: chegar, psandoz
    Contributed-by: chris.hegarty@oracle.com