8226863: [aix] jdk/java/lang/reflect/exeCallerAccessTest cannot launch on primordial thread

[Langer, Christoph]

Hi Thomas,

I looked at this.

One thing that catches my eye immediately: exeCallerAccessTest.c, line 149: Looks like this #error would always fire on Windows. So the test wouldn’t compile there…? Or am I wrong?

Furthermore, if we do this new thread dance only on AIX, shouldn’t all the extra coding be guarded by #ifdef _AIX? The only common part of the changes would be to rename main to main_inner and call this method for all non-AIX cases…

Best regards
Christoph

From: ppc-aix-port-dev <ppc-aix-port-dev-bounces at openjdk.java.net> On Behalf Of Thomas Stüfe
Sent: Donnerstag, 27. Juni 2019 09:02
To: Java Core Libs <core-libs-dev at openjdk.java.net>; ppc-aix-port-dev <ppc-aix-port-dev at openjdk.java.net>
Subject: 8226863: [aix] jdk/java/lang/reflect/exeCallerAccessTest cannot launch on primordial thread

Hi all,

Issue:
https://bugs.openjdk.java.net/browse/JDK-8226863
webrev:
http://cr.openjdk.java.net/~stuefe/webrevs/8226863--jdk-java-lang-reflect-execalleraccesstest-cannot-launch-on-primordial-thread/webrev.00/webrev/

we have this annoying issue on AIX that the libjvm cannot be invoked on a primordial thread. Therefore we need to change launchers which create the VM to spawn own threads (we only do this where it is worth the effort - this, admittedly, is a corner case, we could alternatively just disable the test on AIX).

This is annoying and vaguely embarrassing :-/ Maybe IBM will step in some time and help us solve the underlying issues which have to do with the inability to create guard pages on the primordial thread stack (among other things IIRC).

Thanks for reviewing,

Thomas