<AWT Dev> [9] Review Request: 8033367 [macosx] Appletviewer was broken in jdk8 b124

Petr Pchelko petr.pchelko at oracle.com
Mon Jun 16 11:31:16 UTC 2014

Hello, Anthony.

Thanks for the review, the new version is here:

I've also made eawt Application start AppKit, I've forgot about this one initially. 
Now I've made a grep over all loadLibrary("awt") usages and is looks like it's 
replaced with getDefaultToolkit in all places we need. 

With best regards. Petr.

On 03 июня 2014 г., at 17:59, Anthony Petrov <anthony.petrov at oracle.com> wrote:

> Hi Petr,
> The fix looks good to me. One minor nit: every file that includes AWT_debug.h will contain its own copy of the ShouldPrintVerboseDebugging() function and the debug flag. Could we have only one copy instead?
> --
> best regards,
> Anthony
> On 6/3/2014 3:18 PM, Petr Pchelko wrote:
>> Hello, AWT Team.
>> Please review a little fix for the issue:
>> https://bugs.openjdk.java.net/browse/JDK-8033367
>> The fix is available here:
>> http://cr.openjdk.java.net/~pchelko/9/8033367/webrev/
>> The problem:
>> We were doing too much in JNI_OnLoad. Loading many classes, making sync calls to Appkit thread, loading classes and native libs from Appkit thread and so on.
>> This was causing deadlocks and crashes that we've workarounded for 8. But for 9 I've rewritten the AWT startup code to make JNI_OnLoad do a bit less work.
>> The solution:
>> Now loading awt native lib does not trigger loading AppKit and starting NSApplication. Instead we just load a library and tell Cocoa we are going to be multithreaded.
>> We start Appkit when Toolkit is created, so now we avoid problems with deadlocks on runtime lock.
>> An issue with the fix:
>> I've made GraphicsEnvironment also load AppKit, because we use an NSView for a scratch surface in an OpenGL context. Really this is quite likely not needed as we are
>> (should be) using FBOs for offscreen rendering. But getting rid of an NSView-based scratch surface is a separate big project, so I'll file a bug for it and now let's load
>> Appkit when GraphicsEnvironment is initialized too.
>> Testing:
>> I have run all JCK, all regression tests, sanity-tested JFX interop and SWT interop, checked applets and webstart, tested headless mode. Everything seems to work fine,
>> but anyway this fix is extremely risky. But this should be done if we want to avoid a problems like JDK-8033367 or JDK-8031050.
>> Thank you.
>> With best regards. Petr.

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