Dose OpenJDK need gcc unwind support?

[majia gm]

Hi, everyone.

I'd like to use zero. But the current gcc in our platform use
setjmp/longjmp to implement c++ exception and has no support for
one-by-one frame unwinding. And I want to know, whether zero need gcc
unwind support or not?

I know gcj need this to implement classloader inheritance. For example
, Loader A load Class A, and Class A calls method in Class B. Then
Class B need to be loaded by using the same class loader, Loader A.

In order to know which class call the method in Class B, JVM in gcj
need to unwind the stack to find out in which class the calling method
is.

Dose OpenJDK has the similar implementation on abi stack unwind?

Thank you.