K 10
svn:author
V 3
ian
K 8
svn:date
V 27
2017-09-25T23:24:41.660835Z
K 7
svn:log
V 886
Fix handling of uncaught exceptions in a std::terminate() handler on arm.

When raising an exception, the unwinder searches for a catch handler and if
none is found it should invoke std::terminate() with the uncaught exception
as the "current" exception.  Before this change, the terminate handler was
invoked with no exception as current (abi::__cxa_current_exception_type()
returned NULL), because the return value from the unwinder indicated an
internal failure in unwinding.  It turns out that was because all errors
from get_eit_entry() were translated to _URC_FAILURE.  Now the error is
returned untranslated, which allows _URC_END_OF_STACK to percolate upwards
to throw_exception() in libcxxrt.  When it sees that return status it
properly calls std::terminate() with the uncaught exception installed
as the current exception, allowing custom terminate handlers to work
with it.

END