[Bug libstdc++/85812] [7/8/9 Regression] make_exception_ptr can leak the allocated exception if construction throws

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85812

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Author: redi
Date: Thu May 17 15:03:29 2018
New Revision: 260323

URL: https://gcc.gnu.org/viewcvs?rev=260323&root=gcc&view=rev
Log:
PR libstdc++/85812 fix memory leak in std::make_exception_ptr

        PR libstdc++/85812
        * libsupc++/cxxabi_init_exception.h (__cxa_free_exception): Declare.
        * libsupc++/exception_ptr.h (make_exception_ptr) [__cpp_exceptions]:
        Refactor to separate non-throwing and throwing implementations.
        [__cpp_rtti && !_GLIBCXX_HAVE_CDTOR_CALLABI]: Deallocate the memory
        if constructing the object throws.

Modified:
    trunk/libstdc++-v3/ChangeLog
    trunk/libstdc++-v3/libsupc++/cxxabi_init_exception.h
    trunk/libstdc++-v3/libsupc++/exception_ptr.h