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

[Varada M]

On Wed, 8 Feb 2023 11:37:14 GMT, Alan Bateman <alanb 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.

Thank you @AlanBateman, I will update with the indentation fixes. [12006](https://github.com/openjdk/jdk/pull/12006) was a parent issue. I thought to make a PR [12302](https://github.com/openjdk/jdk/pull/12302) for other tests after the changes for PR [12006](https://github.com/openjdk/jdk/pull/12006) is accepted by the community.

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