Change all_objfiles_safe adapter to be a method on program_space

This changes the all_objfiles_safe range adapter to be a method on the
program space, and fixes up all the users.

gdb/ChangeLog
2019-01-15  Tom Tromey  <tom@tromey.com>

	* progspace.h (program_space) <objfiles_safe_range>: New
	typedef.
	<objfiles_safe>: New method.
	* objfiles.h (class all_objfiles_safe): Remove.
	* objfiles.c (free_all_objfiles, objfile_purge_solibs): Update.
	* jit.c (jit_inferior_exit_hook): Update.

1 files changed, 18 insertions, 0 deletions

diff --git a/gdb/progspace.h b/gdb/progspace.h
index abc53973b6f..472baeb9a16 100644
--- a/gdb/progspace.h
+++ b/gdb/progspace.h
@@ -26,6 +26,8 @@
 #include "gdb_bfd.h"
 #include "gdb_vecs.h"
 #include "registry.h"
+#include "common/next-iterator.h"
+#include "common/safe-iterator.h"
 
 struct target_ops;
 struct bfd;
@@ -148,6 +150,22 @@ struct program_space
     return objfiles_range (objfiles_head);
   }
 
+  typedef next_adapter<struct objfile,
+		       basic_safe_iterator<next_iterator<objfile>>>
+    objfiles_safe_range;
+
+  /* An iterable object that can be used to iterate over all objfiles.
+     The basic use is in a foreach, like:
+
+     for (objfile *objf : pspace->objfiles_safe ()) { ... }
+
+     This variant uses a basic_safe_iterator so that objfiles can be
+     deleted during iteration.  */
+  objfiles_safe_range objfiles_safe ()
+  {
+    return objfiles_safe_range (objfiles_head);
+  }
+
   /* Pointer to next in linked list.  */
   struct program_space *next = NULL;