OpenJDK Zero PPC Build on OS X Leopard

[Mike Swingler]

On Sep 16, 2011, at 7:44 AM, Kurt Miller wrote:

> On Friday 16 September 2011 03:23:10 am Konstantin Tokarev wrote:
> 
>> Seems like I've found possible reason for crash: JNA uses JAWT_MacOSXDrawingSurfaceInfo struct, but we don't provide it. Unmodified JNA just fails to compile. 
>> 
>> Code fragment from JNA:
>> 
>> #elif __APPLE__
>>      // WARNING: the view ref is not guaranteed to be stable except during
>>      // component paint (see jni_md.h)
>>      JAWT_MacOSXDrawingSurfaceInfo* mdsi =
>>        (JAWT_MacOSXDrawingSurfaceInfo*)dsi->platformInfo;
>>      if (mdsi != NULL) {
>>        handle = (unsigned long)mdsi->cocoaViewRef;
>>        if (!handle) {
>>          throwByName(env, EIllegalState, "Can't get Cocoa View");
>>        }    
>>      }    
>>      else {
>>        throwByName(env, EError, "Can't get OS X platform info");
>>      }
>> #else
>>      JAWT_X11DrawingSurfaceInfo* xdsi =
>>        (JAWT_X11DrawingSurfaceInfo*)dsi->platformInfo;
>>      if (xdsi != NULL) {
>>        handle = xdsi->drawable;
>>        if (!handle) {
>>          throwByName(env, EIllegalState, "Can't get Drawable");
>>        }
>>      }
>>      else {
>>        throwByName(env, EError, "Can't get X11 platform info");
>>      }
>> #endif
> 
> Check the Max OS X port for that function. Mac OS X is built on-top
> of bsd-port, meaning they merge bsd-port changes into their tree from
> time to time and then add Cocoa based UI on top. 
> 
> I'm thinking that we've not gotten far enough into loading jna to hit
> that missing function. We're crashing very earily. The code for
> JNI_OnLoad in jna is here:
> 
> https://github.com/twall/jna/blob/master/native/dispatch.c

Actually, the macosx-port doesn't have the JAWT API implemented yet, and it won't be vending a Cocoa NSView* when we do get around to implementing it. We actually won't be providing an pointer to the underlying window or view hierarchy, because it could exist in a separate process. Instead, JAWT clients will be expected to provide a CoreAnimation layer that they want placed on top the AWT component they are covering. We will then take that and link it up across processes to form a coherent render tree.

FYI,
Mike Swingler
Java Engineering
Apple Inc.