[RFA 5/5] Remove the last cleanup from regcache.c

[Tom Tromey <tom@tromey.com>]

This removes the last cleanup from regcache.c by changing one function
to use std::string.

ChangeLog
2017-09-23  Tom Tromey  <tom@tromey.com>

	* regcache.c (regcache::dump): Use string_printf.
---
 gdb/ChangeLog  |  4 ++++
 gdb/regcache.c | 11 ++++-------
 2 files changed, 8 insertions(+), 7 deletions(-)

diff --git a/gdb/regcache.c b/gdb/regcache.c
index 46d8cfb..0eefec6 100644
--- a/gdb/regcache.c
+++ b/gdb/regcache.c
@@ -1350,7 +1350,6 @@ reg_flush_command (char *command, int from_tty)
 void
 regcache::dump (ui_file *file, enum regcache_dump_what what_to_dump)
 {
-  struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
   struct gdbarch *gdbarch = m_descr->gdbarch;
   int regnum;
   int footnote_nr = 0;
@@ -1442,6 +1441,7 @@ regcache::dump (ui_file *file, enum regcache_dump_what what_to_dump)
       /* Type.  */
       {
 	const char *t;
+	std::string name_holder;
 
 	if (regnum < 0)
 	  t = "Type";
@@ -1452,13 +1452,11 @@ regcache::dump (ui_file *file, enum regcache_dump_what what_to_dump)
 	    t = TYPE_NAME (register_type (arch (), regnum));
 	    if (t == NULL)
 	      {
-		char *n;
-
 		if (!footnote_register_type_name_null)
 		  footnote_register_type_name_null = ++footnote_nr;
-		n = xstrprintf ("*%d", footnote_register_type_name_null);
-		make_cleanup (xfree, n);
-		t = n;
+		name_holder = string_printf ("*%d",
+					     footnote_register_type_name_null);
+		t = name_holder.c_str ();
 	      }
 	    /* Chop a leading builtin_type.  */
 	    if (startswith (t, blt))
@@ -1592,7 +1590,6 @@ regcache::dump (ui_file *file, enum regcache_dump_what what_to_dump)
     fprintf_unfiltered (file, 
 			"*%d: Register type's name NULL.\n",
 			footnote_register_type_name_null);
-  do_cleanups (cleanups);
 }
 
 static void
-- 
2.9.5