Allocate the address map on the psymtab obstack

After this patch, the psymtab address map will now be allocated on the
psymtab obstack rather than the objfile obstack.  This also changes
the psymtab storage object to make the obstack private; this will be
used later.

gdb/ChangeLog
2019-01-10  Tom Tromey  <tom@tromey.com>

	* psymtab.h (psymtab_storage::obstack): New method.
	<m_obstack>: Rename from obstack; now private.
	* psymtab.c (psymtab_storage): Update.
	* dwarf2read.c (create_addrmap_from_index)
	(create_addrmap_from_aranges, dwarf2_build_psymtabs_hard):
	Update.

1 files changed, 13 insertions, 4 deletions

diff --git a/gdb/psymtab.h b/gdb/psymtab.h
index 895f950a466..d0e596980d1 100644
--- a/gdb/psymtab.h
+++ b/gdb/psymtab.h
@@ -55,6 +55,13 @@ public:
 
   void discard_psymtab (struct partial_symtab *pst);
 
+  /* Return the obstack that is used for storage by this object.  */
+
+  struct obstack *obstack ()
+  {
+    return m_obstack;
+  }
+
 
   /* Each objfile points to a linked list of partial symtabs derived from
      this file, one partial symtab structure for each compilation unit
@@ -73,10 +80,6 @@ public:
 
   struct partial_symtab *free_psymtabs = nullptr;
 
-  /* The obstack where allocations are made.  */
-
-  struct obstack *obstack;
-
   /* A byte cache where we can stash arbitrary "chunks" of bytes that
      will not change.  */
 
@@ -87,6 +90,12 @@ public:
 
   std::vector<partial_symbol *> global_psymbols;
   std::vector<partial_symbol *> static_psymbols;
+
+private:
+
+  /* The obstack where allocations are made.  */
+
+  struct obstack *m_obstack;
 };