Add a stub for java.lang.invoke.MethodHandleImpl

[babsingh]

OpenJ9 JDK8 and JDK11 currently use OpenJ9 MethodHandles.

Enabling jdk_bean in JDK8 and JDK11 triggers certain OpenJDK
MethodHandles code paths. However, OpenJ9 MethodHandles are in use
for JDK8 and JDK11, so OpenJDK MethodHandles paths shouldn't be
activated. To address this, a MethodHandleImpl stub was added,
used only with OpenJ9 MethodHandles, and not when OpenJDK
MethodHandles are enabled.

Related: #20531

[babsingh]

fyi @pshipton @llxia, This should fix the InternalError ... OpenJDKCompileStubThrowError failures in JDK8 and JDK11 that were seen in #20531.

[pshipton]

jenkins test sanity alinux jdk8,jdk11

[pshipton]

java/lang/invoke/CustomizedLambdaFormTest.java failed.

00:53:26  /home/jenkins/workspace/Test_openjdk11_j9_sanity.openjdk_aarch64_linux_Personal_testList_1/aqa-tests/openjdk/openjdk-jdk/test/jdk/java/lang/invoke/java.base/java/lang/invoke/MethodHandleHelper.java:44: error: cannot find symbol
00:53:26          return MethodHandleImpl.varargsArray(nargs);
00:53:26                                 ^
00:53:26    symbol:   method varargsArray(int)
00:53:26    location: class MethodHandleImpl
00:53:26  /home/jenkins/workspace/Test_openjdk11_j9_sanity.openjdk_aarch64_linux_Personal_testList_1/aqa-tests/openjdk/openjdk-jdk/test/jdk/java/lang/invoke/java.base/java/lang/invoke/MethodHandleHelper.java:48: error: cannot find symbol
00:53:26          return MethodHandleImpl.varargsArray(arrayType, nargs);
00:53:26                                 ^
00:53:26    symbol:   method varargsArray(Class<CAP#1>,int)
00:53:26    location: class MethodHandleImpl
00:53:26    where CAP#1 is a fresh type-variable:
00:53:26      CAP#1 extends Object from capture of ?
00:53:26  2 errors

[pshipton]

jenkins test extended.openjdk amac jdk11

[pshipton]

extended.openjdk PR https://openj9-jenkins.osuosl.org/job/PullRequest-OpenJ9/6429/

[babsingh]

Added stubs for varargsArray to fix the failure reported in #20570 (comment). Old PR builds:

• JDK11 extended: https://openj9-jenkins.osuosl.org/job/PullRequest-OpenJ9/6429
• JDK8/11 sanity: https://openj9-jenkins.osuosl.org/job/PullRequest-OpenJ9/6427

[babsingh]

https://openj9-jenkins.osuosl.org/job/Test_openjdk11_j9_extended.openjdk_aarch64_mac_Personal/2/consoleFull

10:06:02   Target VM failed to initialize.
10:06:02  java.lang.NullPointerException
10:06:02  	at VMConnection.open(VMConnection.java:157)
10:06:02  	at TestScaffold.connect(TestScaffold.java:636)
10:06:02  	at TestScaffold.startUp(TestScaffold.java:364)
10:06:02  	at TestScaffold.startTo(TestScaffold.java:374)
10:06:02  	at TestScaffold.startToMain(TestScaffold.java:369)
10:06:02  	at ClassesByName2Test.runTests(ClassesByName2Test.java:147)
10:06:02  	at TestScaffold.startTests(TestScaffold.java:431)
10:06:02  	at ClassesByName2Test.main(ClassesByName2Test.java:123)
10:06:02  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
10:06:02  	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
10:06:02  	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
10:06:02  	at java.base/java.lang.reflect.Method.invoke(Method.java:572)
10:06:02  	at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:333)
10:06:02  	at java.base/java.lang.Thread.run(Thread.java:835)

• The above failure was seen in the extended.openjdk build. It is a known issue and unrelated to this PR: classesByName2Test_0_FAILED Target VM failed to initialize due to NPE, ERROR: transport error 202 #17700.

[pshipton]

jenkins compile amac jdk11

[pshipton]

java/lang/invoke/CustomizedLambdaFormTest.java passed in a grinder.