RFR: 8300139 : [AIX] Use pthreads to avoid JNI_createVM call from primordial thread

[Alan Bateman]

On Tue, 31 Jan 2023 05:24:35 GMT, Varada M <duke at openjdk.org> wrote:

> 1. test/jdk/jni/nullCaller/NullCallerTest.java
> 2. test/jdk/java/lang/reflect/exeCallerAccessTest/CallerAccessTest.java
> 3. test/hotspot/jtreg/runtime/jni/CalleeSavedRegisters/FPRegs.java 
> 
>     The above tests were blocked on AIX [@require os.family != "aix"] because these tests are failing to call JNI_CreateJavaVM. This is solved by implementing JNI_CreateJavaVM call via POSIX threads. 
>    Similarly there are tests which are not blocked and still failing to call JNI_CreateJavaVM on AIX :
> 
> 4. test/hotspot/jtreg/runtime/jni/daemonDestroy/TestDaemonDestroy.java { PR : [12006](https://github.com/openjdk/jdk/pull/12006) }
> 5. test/lib-test/jdk/test/lib/process/TestNativeProcessBuilder.java 
> 
> The reported issue : [8300139](https://bugs.openjdk.org/browse/JDK-8300139l)

test/jdk/jni/nullCaller/exeNullCallerTest.cpp line 206:

> 204: #else
> 205:    run(&argv);
> 206: #endif //AIX

The tests in test/jdk use 4 space indent rather than 2. Otherwise the changes to these tests look okay, just a bit annoying to have the same #ifdef AIX ... #endif code copied into each test.

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PR: https://git.openjdk.org/jdk/pull/12302