Remove dwarf2_per_cu_data::dwarf2_per_objfile reference in cutu_reader::keep

Here, it should be safe to use dwarf2_per_cu_data->cu->per_objfile, as
we know that dwarf2_per_cu_data->cu will be set at this point.

Note that this adds a reference to dwarf2_per_cu_data::cu, which we'll
want to remove later, but the current focus is to remove references to
dwarf2_per_cu_data::dwarf2_per_objfile.  We'll deal with that in a
subsequent patch.

gdb/ChangeLog:

	* dwarf2/read.c (cutu_reader::keep): Access dwarf2_per_objfile
	object through m_this_cu->cu.

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 3138e961bc9706c308202f1d18a8f72763e8fdaf..d028e86c356843e717144b0ea31f215654192f60 100644 (file)
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -7124,8 +7124,11 @@ cutu_reader::keep ()
   gdb_assert (!dummy_p);
   if (m_new_cu != NULL)
     {
-      struct dwarf2_per_objfile *dwarf2_per_objfile
-       = m_this_cu->dwarf2_per_objfile;
+      /* We know that m_this_cu->cu is set, since we are in the process of
+         parsing the CU.  */
+      gdb_assert (m_this_cu->cu != nullptr);
+      dwarf2_per_objfile *dwarf2_per_objfile = m_this_cu->cu->per_objfile;
+
       /* Link this CU into read_in_chain.  */
       m_this_cu->cu->read_in_chain = dwarf2_per_objfile->per_bfd->read_in_chain;
       dwarf2_per_objfile->per_bfd->read_in_chain = m_this_cu;