RFR: 8260931: Implement JEP 382: New macOS Rendering Pipeline [v4]

[Gerard Ziemski]

On Wed, 10 Feb 2021 21:45:37 GMT, Gerard Ziemski <gziemski at openjdk.org> wrote:

>> Ajit Ghaisas has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - Lanai PR#177 - 8261430 - aghaisas
>>  - Lanai PR#176 - 8261399 - jdv
>
> Marked as reviewed by gziemski (Committer).

According to Xcode Instruments leak profile, there are 2 minor memory leaks in the Metal rendering pipeline:

`#1 Malloc 80 Bytes	1	0x7fde0d4247b0	80 Bytes	libjava.dylib	getStringUTF8`
   0 libsystem_malloc.dylib malloc_zone_malloc
   1 libsystem_malloc.dylib malloc
   2 libjava.dylib getStringUTF8 /Volumes/Work/review/2403/jdk/src/java.base/share/native/libjava/jni_util.c:888
   3 libjava.dylib JNU_GetStringPlatformChars /Volumes/Work/review/2403/jdk/src/java.base/share/native/libjava/jni_util.c:917
   4 libawt_lwawt.dylib Java_sun_java2d_metal_MTLGraphicsConfig_getMTLConfigInfo /Volumes/Work/review/2403/jdk/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.m:151
   5  0x11ab08d48
   6  0x11ab0250d

`#2 Malloc 80 Bytes	1	0x7fde0d4325a0	80 Bytes	libjava.dylib	getStringUTF8`
   0 libsystem_malloc.dylib malloc_zone_malloc
   1 libsystem_malloc.dylib malloc
   2 libjava.dylib getStringUTF8 /Volumes/Work/review/2403/jdk/src/java.base/share/native/libjava/jni_util.c:888
   3 libjava.dylib JNU_GetStringPlatformChars /Volumes/Work/review/2403/jdk/src/java.base/share/native/libjava/jni_util.c:917
   4 libawt_lwawt.dylib Java_sun_java2d_metal_MTLGraphicsConfig_tryLoadMetalLibrary /Volumes/Work/review/2403/jdk/src/java.desktop/macosx/native/libawt_lwawt/java2d/metal/MTLGraphicsConfig.m:120
   5  0x11ab08d48
   6  0x11ab024c8

Those can be handled as a followup issues though if you like, it's only 160 bytes total.

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PR: https://git.openjdk.java.net/jdk/pull/2403