RFR: 8242361: JavaFX Web View crashes with Segmentation Fault, when HTML contains Data-URIs [v6]

[Matthias Bläsing]

> The code in WTF::scheduleDispatchFunctionsOnMainThread assumes, that
> the java class com.sun.webkit.MainThread can be found be the JNI
> function FindClass. This is only true if the class is loadable by the
> system class loader.
> 
> One such case is when the OpenJFX modules are loaded from a new
> ModuleLayer. To fix this, the reference to the class needs to be loaded
> from when a JNI call from Java into native code is active. In that case
> FindClass uses the classloader associated with that method.
> 
> The test code can be executed by running:
> 
> cd tests/manual/web/dataurl
> ../../../../gradlew run

Matthias Bläsing has updated the pull request incrementally with one additional commit since the last revision:

  Ensure error code 0 is not reached by normal javafx exit

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/360/files
  - new: https://git.openjdk.java.net/jfx/pull/360/files/c81a478d..78571648

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jfx&pr=360&range=05
 - incr: https://webrevs.openjdk.java.net/?repo=jfx&pr=360&range=04-05

  Stats: 2 lines in 2 files changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jfx/pull/360.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/360/head:pull/360

PR: https://git.openjdk.java.net/jfx/pull/360