1 # Known bug in GDB < 7.8:

     2 # https://sourceware.org/bugzilla/show_bug.cgi?id=16215

     3 # Backported to GDB 7.6 until we upgrade to GDB 7.9.

     4 # Without this patch, we get spurious errors debugging on SPARC,

     5 # especially with GCC >= 4.9.0.

     6 --- gdb-7.6/gdb/dwarf2-frame.c	2013-01-31 10:31:48.000000000 -0800

     7 +++ gdb-7.6/gdb/dwarf2-frame.c	2015-09-09 16:07:52.767075883 -0700

     8 @@ -1497,16 +1497,12 @@

     9  {

    10    while (get_frame_type (this_frame) == INLINE_FRAME)

    11      this_frame = get_prev_frame (this_frame);

    12 -  /* This restriction could be lifted if other unwinders are known to

    13 -     compute the frame base in a way compatible with the DWARF

    14 -     unwinder.  */

    15 -  if (!frame_unwinder_is (this_frame, &dwarf2_frame_unwind)

    16 -      && !frame_unwinder_is (this_frame, &dwarf2_tailcall_frame_unwind))

    17 -    error (_("can't compute CFA for this frame"));

    18 +

    19    if (get_frame_unwind_stop_reason (this_frame) == UNWIND_UNAVAILABLE)

    20      throw_error (NOT_AVAILABLE_ERROR,

    21  		 _("can't compute CFA for this frame: "

    22  		   "required registers or memory are unavailable"));

    23 +

    24    return get_frame_base (this_frame);

    25  }

    26