Bug 1398: Crash only occurs @ -[NSOpenGLContext setView:] when using XCode 11 _and_ its default SDK 'macosx10.15'

This patch demonstrates that using the SDK 'macosx10.11' does not cause the crash @ -[NSOpenGLContext setView:].

SDK 'macosx10.15' enforces Apple's own Cargo Cult of 'main-thread' by throwing a SIGILL signal (or SIGABRT)
- essentially an exception.

This surely renders our code officially invalid due to this policy,
i.e. we are not allowed to issue [* setView] on any non main-thread.

+++

The crash occurs independently of used Java version on Java 8 - 11,
as well as on JogAmp 2.3.2 - current master tip.

+++

The initial remedy to issue said action on the main-thread in a blocking/wait
manner has the risk to deadlock, due to

1) [NSOpenGLContext setView:] itself using a mutex (Thanks to Ken Harris's analysis)

and

(2) in case where we are 'thread hopping':
- [main-thread] Event like 'window ready' -> kick off action on EDT-thread *blocking*
- [EDT-thread] Create stuff incl OpenGLContext -> kick off setView on main-thread *blocking*

This has to be further investigated.

This crash finally has been reliably reproduced now.

1 files changed, 13 insertions, 3 deletions

diff --git a/src/test-native/bug1398/make-bug1398.sh b/src/test-native/bug1398/make-bug1398.sh
index 7ec9935d9..bf2367313 100755
--- a/src/test-native/bug1398/make-bug1398.sh
+++ b/src/test-native/bug1398/make-bug1398.sh
@@ -5,15 +5,25 @@ set -x
 JOGAMP_VERSION=v2.3.2
 #JOGAMP_VERSION=v2.2.4
 
+unset SDKROOT
+
 CLASSPATH=".:/Users/jogamp/projects/JogAmp/builds/$JOGAMP_VERSION/jogamp-all-platforms/jar/gluegen-rt.jar:/Users/jogamp/projects/JogAmp/builds/$JOGAMP_VERSION/jogamp-all-platforms/jar/jogl-all.jar"
 
+#CLASSPATH=".:/Users/jogamp/projects/JogAmp/gluegen/build/gluegen-rt.jar:/Users/jogamp/projects/JogAmp/jogl/build/jar/jogl-all.jar"
+
 ok=0
 
-xcrun clang -x objective-c -framework Cocoa \
-    -o Bug1398macOSContextOpsOnMainThread Bug1398macOSContextOpsOnMainThread.c \
+# Default macosx10.15 SDK on XCode 11
+xcrun --sdk macosx10.15 clang -x objective-c -framework Cocoa \
+    -o Bug1398LauncherSDK1015 Bug1398Launcher.c \
+    && ok=1
+
+# Non-Default macosx10.11 SDK (JogAmp builds)
+xcrun --sdk macosx10.11 clang -x objective-c -framework Cocoa \
+    -o Bug1398LauncherSDK1011 Bug1398Launcher.c \
     && ok=1
 
 if [ $ok -eq 1 ] ; then
-	javac -source 1.8 -target 1.8 -classpath $CLASSPATH RedSquareES2.java Bug1398macOSContextOpsOnMainThread.java
+	javac -source 1.8 -target 1.8 -classpath $CLASSPATH RedSquareES2.java Bug1398MainClass.java
 fi