[8u20] RFR (XXS): 8033626: assert(ex_map->jvms()->same_calls_as(_exceptions->jvms())) failed: all collected exceptions must come from the same place

[Vladimir Ivanov]

https://bugs.openjdk.java.net/browse/JDK-8033626
http://cr.openjdk.java.net/~vlivanov/8033626/webrev.8u20.00/

This is a request for a backport to 8u20. The fix was integrated into 9 
on Tuesday last week and nightly testing hasn't found any issues.

The patch from 9 applies almost cleanly (modulo small unrelated changes 
which cause conflict).

Original fix:
http://hg.openjdk.java.net/jdk9/hs/hotspot/rev/dd14b24efd49
http://mail.openjdk.java.net/pipermail/hotspot-compiler-dev/2014-June/014787.html

Best regards,
Vladimir Ivanov