[Bug 210874] devel/gdb: fork following + x86 debug registers + info auxv

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=210874

            Bug ID: 210874
           Summary: devel/gdb: fork following + x86 debug registers + info
                    auxv
           Product: Ports & Packages
           Version: Latest
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: freebsd-ports-bugs at FreeBSD.org
          Reporter: jhb at FreeBSD.org
                CC: luca.pizzamiglio at gmail.com
            Blocks: 157755
                CC: luca.pizzamiglio at gmail.com
             Flags: maintainer-feedback?(luca.pizzamiglio at gmail.com)

Created attachment 172174
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=172174&action=edit
gdb_port.patch

This patchset includes several fixes merged to gdb upstream including:
- fix fork following to honor 'detach-on-fork'
- fix vfork following to post a fake vfork_done event to fix breakpoints
  in vfork parents (a real vfork_done event is pending but requires kernel
  changes currently in review)
- fix x86 debug registers to work with multiple threads (PR 157755)
- add support for 'info auxv' on both live processes and cores.


Referenced Bugs:

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=157755
[Bug 157755] [patch] gdb(1) hardware watchpoints do not work correctly in
multi-threaded programs
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