RFR [9] 8034181: SIGBUS at Java_sun_nio_ch_SctpChannelImpl_receive0

[Chris Hegarty]

The native SCTP implementation assumes that the given byte buffer ( buffer address + position ) is memory aligned. It re-uses the buffer for handling notifications from the SCTP Stack ( as well as for reading data off the socket ). This can result in a SIBGUS on sparc(v9) if the address is not 4 byte aligned [1].

The trivial solution is to copy the SCTP notification into a stack allocated buffer, for handling, if the given address is not 4 byte aligned.

http://cr.openjdk.java.net/~chegar/8034181/webev.00/webrev/

-Chris

[1] https://bugs.openjdk.java.net/browse/JDK-8034181