On AIX , new jtreg test com/sun/tools/attach/warnings/DynamicLoadWarningTest.java always failed with the output :
----------System.err:(294/28579)---------- STARTED DynamicLoadWarningTest::testLoadJavaAgent 'testLoadJavaAgent()' SUCCESSFUL DynamicLoadWarningTest::testLoadJavaAgent 'testLoadJavaAgent()' STARTED DynamicLoadWarningTest::testLoadOneJvmtiAgent '[1] DynamicLoadWarningTest$$Lambda/0x000000040020bd88@600d90bb' org.opentest4j.AssertionFailedError: expected: <1> but was: <2> at org.junit.jupiter.api.AssertionFailureBuilder.build(AssertionFailureBuilder.java:151) at org.junit.jupiter.api.AssertionFailureBuilder.buildAndThrow(AssertionFailureBuilder.java:132) at org.junit.jupiter.api.AssertEquals.failNotEqual(AssertEquals.java:197) at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:150) at org.junit.jupiter.api.AssertEquals.assertEquals(AssertEquals.java:145) at org.junit.jupiter.api.Assertions.assertEquals(Assertions.java:528) at DynamicLoadWarningTest$AppRunner.stderrShouldContain(DynamicLoadWarningTest.java:298) at DynamicLoadWarningTest.testLoadOneJvmtiAgent(DynamicLoadWarningTest.java:125) at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) at java.base/java.lang.reflect.Method.invoke(Method.java:580) Reason seems to be the different behavior of dlopen on AIX compared to e.g. Linux This is what I find in the manpage of AIX 7.2 or 7.3 : https://www.ibm.com/docs/en/aix/7.2?topic=d-dlopen-subroutine https://www.ibm.com/docs/en/aix/7.3?topic=d-dlopen-subroutine 'If the module is already loaded, it is not loaded again, but a new, unique value will be returned by the dlopen subroutine.' Sounds different to what Linux documents in the manpage: https://man7.org/linux/man-pages/man3/dlopen.3.html 'If the same shared object is opened again with dlopen(), the same object handle is returned.' We skip this special subtest on AIX . ------------- Commit messages: - JDK-8309549 Changes: https://git.openjdk.org/jdk/pull/14393/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14393&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8309549 Stats: 7 lines in 1 file changed: 3 ins; 0 del; 4 mod Patch: https://git.openjdk.org/jdk/pull/14393.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14393/head:pull/14393 PR: https://git.openjdk.org/jdk/pull/14393
