Use std::vector in linespec_state

This changes linespec_state to use a std::vector, and changes
linespec_canonical_name to use std::string.  This removes some manual
memory management, including some odd cleanup code in in
decode_line_full.

Approved-By: Simon Marchi <simon.marchi@efficios.com>

diff --git a/gdb/linespec.c b/gdb/linespec.c
index 03a76ae6afd227c0b35dbd3307107f76f4feb29a..09ce0d9df4a5f0f56137be99850988a670c5d68f 100644 (file)
--- a/gdb/linespec.c
+++ b/gdb/linespec.c
@@ -116,7 +116,7 @@ struct linespec
 struct linespec_canonical_name
 {
   /* Remaining text part of the linespec string.  */
-  char *suffix;
+  std::string suffix;
 
   /* If NULL then SUFFIX is the whole linespec string.  */
   struct symtab *symtab;
@@ -150,11 +150,6 @@ struct linespec_state
   {
   }
 
-  ~linespec_state ()
-  {
-    xfree (canonical_names);
-  }
-
   DISABLE_COPY_AND_ASSIGN (linespec_state);
 
   /* Add ADDR to the address set.  Return true if this is a new
@@ -191,7 +186,7 @@ struct linespec_state
   struct linespec_result *canonical;
 
   /* Canonical strings that mirror the std::vector<symtab_and_line> result.  */
-  linespec_canonical_name *canonical_names = nullptr;
+  std::vector<linespec_canonical_name> canonical_names;
 
   /* Are we building a linespec?  */
   int is_linespec = 0;
@@ -1083,12 +1078,9 @@ add_sal_to_sals (struct linespec_state *self,
 
   if (self->canonical)
     {
-      struct linespec_canonical_name *canonical;
+      linespec_canonical_name &canonical
+       = self->canonical_names.emplace_back ();
 
-      self->canonical_names = XRESIZEVEC (struct linespec_canonical_name,
-                                         self->canonical_names,
-                                         sals->size ());
-      canonical = &self->canonical_names[sals->size () - 1];
       if (!literal_canonical && sal->symtab)
        {
          symtab_to_fullname (sal->symtab);
@@ -1098,21 +1090,21 @@ add_sal_to_sals (struct linespec_state *self,
             the time being.  */
          if (symname != NULL && sal->line != 0
              && self->language->la_language == language_ada)
-           canonical->suffix = xstrprintf ("%s:%d", symname,
-                                           sal->line).release ();
+           canonical.suffix = string_printf ("%s:%d", symname,
+                                             sal->line);
          else if (symname != NULL)
-           canonical->suffix = xstrdup (symname);
+           canonical.suffix = symname;
          else
-           canonical->suffix = xstrprintf ("%d", sal->line).release ();
-         canonical->symtab = sal->symtab;
+           canonical.suffix = string_printf ("%d", sal->line);
+         canonical.symtab = sal->symtab;
        }
       else
        {
          if (symname != NULL)
-           canonical->suffix = xstrdup (symname);
+           canonical.suffix = symname;
          else
-           canonical->suffix = xstrdup ("<unknown>");
-         canonical->symtab = NULL;
+           canonical.suffix = "<unknown>";
+         canonical.symtab = NULL;
        }
     }
 }
@@ -1307,7 +1299,7 @@ canonical_to_fullform (const struct linespec_canonical_name *canonical)
     return canonical->suffix;
   else
     return string_printf ("%s:%s", symtab_to_fullname (canonical->symtab),
-                         canonical->suffix);
+                         canonical->suffix.c_str ());
 }
 
 /* Given FILTERS, a list of canonical names, filter the sals in RESULT
@@ -1418,7 +1410,6 @@ decode_line_2 (struct linespec_state *self,
       std::string displayform;
 
       canonical = &self->canonical_names[i];
-      gdb_assert (canonical->suffix != NULL);
 
       std::string fullform = canonical_to_fullform (canonical);
 
@@ -1430,7 +1421,7 @@ decode_line_2 (struct linespec_state *self,
 
          fn_for_display = symtab_to_filename_for_display (canonical->symtab);
          displayform = string_printf ("%s:%s", fn_for_display,
-                                      canonical->suffix);
+                                      canonical->suffix.c_str ());
        }
 
       items.emplace_back (std::move (fullform), std::move (displayform),
@@ -3130,14 +3121,6 @@ decode_line_full (struct location_spec *locspec, int flags,
   gdb_assert (result.size () == 1 || canonical->pre_expanded);
   canonical->pre_expanded = 1;
 
-  /* Arrange for allocated canonical names to be freed.  */
-  std::vector<gdb::unique_xmalloc_ptr<char>> hold_names;
-  for (int i = 0; i < result.size (); ++i)
-    {
-      gdb_assert (state->canonical_names[i].suffix != NULL);
-      hold_names.emplace_back (state->canonical_names[i].suffix);
-    }
-
   if (select_mode == NULL)
     {
       if (top_level_interpreter ()->interp_ui_out ()->is_mi_like_p ())