[Bug exp/17106] Infinite recursion in in_dynamic_types (e.g. when printing a variable)

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https://sourceware.org/bugzilla/show_bug.cgi?id=17106

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https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d98b7a16a982e4a17995536250b55f7ff82bd78e

commit d98b7a16a982e4a17995536250b55f7ff82bd78e
Author: Tom Tromey <tromey@redhat.com>
Date:   Wed Jul 2 15:53:31 2014 -0600

    fix PR 17106

    This fixes PR 17106, a regression in printing.

    The bug is that resolve_dynamic_type follows struct members and
    references, but doesn't consider the possibility of infinite
    recursion.

    This patch fixes the problem by limiting reference following to the
    topmost layer of calls -- that is, reference-typed struct members are
    never considered as being VLAs.

    Built and regtested on x86-64 Fedora 20.
    New test case included.

    2014-07-14  Tom Tromey  <tromey@redhat.com>

        PR exp/17106:
        * gdbtypes.c (is_dynamic_type_internal): New function, from
        is_dynamic_type.
        (is_dynamic_type): Rewrite.
        (resolve_dynamic_union): Use resolve_dynamic_type_internal.
        (resolve_dynamic_struct): Likewise.
        (resolve_dynamic_type_internal): New function, from
        resolve_dynamic_type.
        (resolve_dynamic_type): Rewrite.

    2014-07-14  Tom Tromey  <tromey@redhat.com>

        * gdb.cp/vla-cxx.cc: New file.
        * gdb.cp/vla-cxx.exp: New file.

-----------------------------------------------------------------------

Summary of changes:
 gdb/ChangeLog                    |   12 ++++++++
 gdb/gdbtypes.c                   |   56 +++++++++++++++++++++++++++----------
 gdb/testsuite/ChangeLog          |    5 +++
 gdb/testsuite/gdb.cp/vla-cxx.cc  |   49 +++++++++++++++++++++++++++++++++
 gdb/testsuite/gdb.cp/vla-cxx.exp |   35 +++++++++++++++++++++++
 5 files changed, 142 insertions(+), 15 deletions(-)
 create mode 100644 gdb/testsuite/gdb.cp/vla-cxx.cc
 create mode 100644 gdb/testsuite/gdb.cp/vla-cxx.exp

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