Introduce objfile::reset_psymtabs

This introduces a new method, objfile::reset_psymtabs, and changes
reread_symbols to use it.  This method simply destroys the existing
partial symbols and recreates the psymtab_storage object.

This patch fixes a latent bug -- namely, that reread_symbols should
clear objfile::psymbol_map, but does not.  I can submit that
separately if you'd prefer.

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

	* symfile.c (reread_symbols): Call objfile->reset_psymtabs.
	* objfiles.h (objfile::reset_psymtabs): New method.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 207194d..211867d 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
 2019-01-10  Tom Tromey  <tom@tromey.com>
 
+       * symfile.c (reread_symbols): Call objfile->reset_psymtabs.
+       * objfiles.h (objfile::reset_psymtabs): New method.
+
+2019-01-10  Tom Tromey  <tom@tromey.com>
+
        * symmisc.c (print_symbol_bcache_statistics): Update.
        (print_objfile_statistics): Update.
        * symfile.c (reread_symbols): Update.

diff --git a/gdb/objfiles.h b/gdb/objfiles.h
index 94b415c..cde025d 100644 (file)
--- a/gdb/objfiles.h
+++ b/gdb/objfiles.h
@@ -293,6 +293,15 @@ struct objfile
 
   DISABLE_COPY_AND_ASSIGN (objfile);
 
+  /* Reset the storage for the partial symbol tables.  */
+
+  void reset_psymtabs ()
+  {
+    psymbol_map.clear ();
+    partial_symtabs.reset (new psymtab_storage (this));
+  }
+
+
   /* All struct objfile's are chained together by their next pointers.
      The program space field "objfiles"  (frequently referenced via
      the macro "object_files") points to the first link in this chain.  */

diff --git a/gdb/symfile.c b/gdb/symfile.c
index d407461..0419712 100644 (file)
--- a/gdb/symfile.c
+++ b/gdb/symfile.c
@@ -2524,23 +2524,13 @@ reread_symbols (void)
          memcpy (offsets, objfile->section_offsets,
                  SIZEOF_N_SECTION_OFFSETS (num_offsets));
 
-         /* FIXME: Do we have to free a whole linked list, or is this
-            enough?  */
-         objfile->partial_symtabs->global_psymbols.clear ();
-         objfile->partial_symtabs->static_psymbols.clear ();
-
-         /* Free the obstacks for non-reusable objfiles.  */
-         psymbol_bcache_free (objfile->partial_symtabs->psymbol_cache);
-         objfile->partial_symtabs->psymbol_cache = psymbol_bcache_init ();
+         objfile->reset_psymtabs ();
 
          /* NB: after this call to obstack_free, objfiles_changed
             will need to be called (see discussion below).  */
          obstack_free (&objfile->objfile_obstack, 0);
          objfile->sections = NULL;
          objfile->compunit_symtabs = NULL;
-         objfile->partial_symtabs->psymtabs = NULL;
-         objfile->partial_symtabs->psymtabs_addrmap = NULL;
-         objfile->partial_symtabs->free_psymtabs = NULL;
          objfile->template_symbols = NULL;
          objfile->static_links = NULL;