Use new/delete instead of malloc/free-based functions

The following patches introduce C++ vectors and strings as fields of the
various ui_out structures.  We therefore need to use new/delete so that
their contructor/destructor is called.  I find it simpler to change all
the allocations in a separate preliminary patch, rather than in each
individual patch.

gdb/ChangeLog:

	* cli-out.c (cli_uiout_dtor): Use delete instead of xfree.
	(cli_out_new): Use new instead of XNEW.
	* mi/mi-out.c (mi_out_data_dtor): Use delete instead of xfree.
	(mi_out_new): Use new instead of XNEW.
	* tui/tui-out.c (tui_out_new): Likewise.
	* ui-out.c (push_level): Likewise.
	(pop_level): Use delete instead of xfree.
	(clear_header_list): Use delete instead of xfree.
	(append_header_to_list): Use new instead of XNEW.
	(ui_out_new): Likewise.

gdb/ChangeLog

@@ -1,3 +1,16 @@
+2016-11-30  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* cli-out.c (cli_uiout_dtor): Use delete instead of xfree.
+	(cli_out_new): Use new instead of XNEW.
+	* mi/mi-out.c (mi_out_data_dtor): Use delete instead of xfree.
+	(mi_out_new): Use new instead of XNEW.
+	* tui/tui-out.c (tui_out_new): Likewise.
+	* ui-out.c (push_level): Likewise.
+	(pop_level): Use delete instead of xfree.
+	(clear_header_list): Use delete instead of xfree.
+	(append_header_to_list): Use new instead of XNEW.
+	(ui_out_new): Likewise.
+
 2016-11-30  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* disable-implicit-rules.mk: New file.

gdb/cli-out.c

@@ -47,7 +47,7 @@ cli_uiout_dtor (struct ui_out *ui_out)
   cli_out_data *data = (cli_out_data *) ui_out_data (ui_out);
 
   VEC_free (ui_filep, data->streams);
-  xfree (data);
+  delete data;
 }
 
 /* These are the CLI output functions */
@@ -395,7 +395,7 @@ struct ui_out *
 cli_out_new (struct ui_file *stream)
 {
   int flags = ui_source_list;
-  cli_out_data *data = XNEW (cli_out_data);
+  cli_out_data *data = new cli_out_data ();
 
   cli_out_data_ctor (data, stream);
   return ui_out_new (&cli_ui_out_impl, data, flags);

gdb/mi/mi-out.c

@@ -413,7 +413,7 @@ mi_out_data_dtor (struct ui_out *ui_out)
   mi_out_data *data = (mi_out_data *) ui_out_data (ui_out);
 
   VEC_free (ui_filep, data->streams);
-  xfree (data);
+  delete data;
 }
 
 /* Initialize private members at startup.  */
@@ -422,7 +422,7 @@ struct ui_out *
 mi_out_new (int mi_version)
 {
   int flags = 0;
-  mi_out_data *data = XNEW (mi_out_data);
+  mi_out_data *data = new mi_out_data ();
   struct ui_file *stream = mem_fileopen ();
 
   mi_out_data_ctor (data, mi_version, stream);

gdb/tui/tui-out.c

@@ -147,7 +147,7 @@ tui_out_new (struct ui_file *stream)
 {
   int flags = 0;
 
-  tui_out_data *data = XNEW (tui_out_data);
+  tui_out_data *data = new tui_out_data ();
 
   /* Initialize base "class".  */
   cli_out_data_ctor (&data->base, stream);

gdb/ui-out.c

@@ -120,7 +120,7 @@ push_level (struct ui_out *uiout,
   struct ui_out_level *current;
 
   uiout->level++;
-  current = XNEW (struct ui_out_level);
+  current = new ui_out_level ();
   current->field_count = 0;
   current->type = type;
   VEC_safe_push (ui_out_level_p, uiout->levels, current);
@@ -139,7 +139,7 @@ pop_level (struct ui_out *uiout,
   gdb_assert (uiout->level > 0);
   gdb_assert (current_level (uiout)->type == type);
   current = VEC_pop (ui_out_level_p, uiout->levels);
-  xfree (current);
+  delete current;
   uiout->level--;
   return uiout->level + 1;
 }
@@ -708,8 +708,9 @@ clear_header_list (struct ui_out *uiout)
       uiout->table.header_first = uiout->table.header_first->next;
       xfree (uiout->table.header_next->colhdr);
       xfree (uiout->table.header_next->col_name);
-      xfree (uiout->table.header_next);
+      delete uiout->table.header_next;
     }
+
   gdb_assert (uiout->table.header_first == NULL);
   uiout->table.header_last = NULL;
   uiout->table.header_next = NULL;
@@ -724,7 +725,7 @@ append_header_to_list (struct ui_out *uiout,
 {
   struct ui_out_hdr *temphdr;
 
-  temphdr = XNEW (struct ui_out_hdr);
+  temphdr = new ui_out_hdr ();
   temphdr->width = width;
   temphdr->alignment = alignment;
   /* We have to copy the column title as the original may be an
@@ -859,8 +860,8 @@ struct ui_out *
 ui_out_new (const struct ui_out_impl *impl, void *data,
 	    int flags)
 {
-  struct ui_out *uiout = XNEW (struct ui_out);
-  struct ui_out_level *current = XNEW (struct ui_out_level);
+  struct ui_out *uiout = new ui_out ();
+  struct ui_out_level *current = new ui_out_level ();
 
   uiout->data = data;
   uiout->impl = impl;