[PATCH 16/27] Store 'name' in block_iterator

[Tom Tromey <tom@tromey.com>]

This changes the block_iterator to store the 'name' that is used by
block_iter_match_next.  This avoids any problem where the name could
be passed inconsistently, and also makes the subsequent patches easier
to understand.
---
 gdb/ada-lang.c |  2 +-
 gdb/block.c    | 22 ++++++++++++----------
 gdb/block.h    | 10 ++++++----
 3 files changed, 19 insertions(+), 15 deletions(-)

diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index 57676f0de95..c04d75590fb 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -6087,7 +6087,7 @@ ada_add_block_symbols (std::vector<struct block_symbol> &result,
   found_sym = false;
   for (sym = block_iter_match_first (block, lookup_name, &iter);
        sym != NULL;
-       sym = block_iter_match_next (lookup_name, &iter))
+       sym = block_iter_match_next (&iter))
     {
       if (symbol_matches_domain (sym->language (), sym->domain (), domain))
 	{
diff --git a/gdb/block.c b/gdb/block.c
index 8aa0e676894..e56c95013b8 100644
--- a/gdb/block.c
+++ b/gdb/block.c
@@ -453,12 +453,14 @@ get_block_compunit_symtab (const struct block *block)
 
 static void
 initialize_block_iterator (const struct block *block,
-			   struct block_iterator *iter)
+			   struct block_iterator *iter,
+			   const lookup_name_info *name = nullptr)
 {
   enum block_enum which;
   struct compunit_symtab *cu;
 
   iter->idx = -1;
+  iter->name = name;
 
   if (block->superblock () == NULL)
     {
@@ -585,7 +587,6 @@ block_iterator_next (struct block_iterator *iterator)
 
 static struct symbol *
 block_iter_match_step (struct block_iterator *iterator,
-		       const lookup_name_info &name,
 		       int first)
 {
   struct symbol *sym;
@@ -605,11 +606,11 @@ block_iter_match_step (struct block_iterator *iterator,
 	    return  NULL;
 
 	  block = cust->blockvector ()->block (iterator->which);
-	  sym = mdict_iter_match_first (block->multidict (), name,
+	  sym = mdict_iter_match_first (block->multidict (), *iterator->name,
 					&iterator->mdict_iter);
 	}
       else
-	sym = mdict_iter_match_next (name, &iterator->mdict_iter);
+	sym = mdict_iter_match_next (*iterator->name, &iterator->mdict_iter);
 
       if (sym != NULL)
 	return sym;
@@ -629,25 +630,26 @@ block_iter_match_first (const struct block *block,
 			const lookup_name_info &name,
 			struct block_iterator *iterator)
 {
-  initialize_block_iterator (block, iterator);
+  initialize_block_iterator (block, iterator, &name);
 
   if (iterator->which == FIRST_LOCAL_BLOCK)
     return mdict_iter_match_first (block->multidict (), name,
 				   &iterator->mdict_iter);
 
-  return block_iter_match_step (iterator, name, 1);
+  return block_iter_match_step (iterator, 1);
 }
 
 /* See block.h.  */
 
 struct symbol *
-block_iter_match_next (const lookup_name_info &name,
-		       struct block_iterator *iterator)
+block_iter_match_next (struct block_iterator *iterator)
 {
+  gdb_assert (iterator->name != nullptr);
+
   if (iterator->which == FIRST_LOCAL_BLOCK)
-    return mdict_iter_match_next (name, &iterator->mdict_iter);
+    return mdict_iter_match_next (*iterator->name, &iterator->mdict_iter);
 
-  return block_iter_match_step (iterator, name, 0);
+  return block_iter_match_step (iterator, 0);
 }
 
 /* See block.h.  */
diff --git a/gdb/block.h b/gdb/block.h
index 9bc80490d7c..5fc41c6df02 100644
--- a/gdb/block.h
+++ b/gdb/block.h
@@ -449,6 +449,9 @@ struct block_iterator
     const struct block *block;
   } d;
 
+  /* If we're trying to match a name, this will be non-NULL.  */
+  const lookup_name_info *name;
+
   /* If we're iterating over a single block, this is always -1.
      Otherwise, it holds the index of the current "included" symtab in
      the canonical symtab (that is, d.symtab->includes[idx]), with -1
@@ -493,10 +496,9 @@ extern struct symbol *block_iter_match_first (const struct block *block,
    symbols.  Don't call this if you've previously received NULL from
    block_iterator_match_first or block_iterator_match_next on this
    iteration.  And don't call it unless ITERATOR was created by a
-   previous call to block_iter_match_first with the same NAME.  */
+   previous call to block_iter_match_first.  */
 
-extern struct symbol *block_iter_match_next
-  (const lookup_name_info &name, struct block_iterator *iterator);
+extern struct symbol *block_iter_match_next (struct block_iterator *iterator);
 
 /* Return true if symbol A is the best match possible for DOMAIN.  */
 
@@ -574,7 +576,7 @@ extern int block_find_non_opaque_type_preferred (struct symbol *sym,
 #define ALL_BLOCK_SYMBOLS_WITH_NAME(block, name, iter, sym)		\
   for ((sym) = block_iter_match_first ((block), (name), &(iter));	\
        (sym) != NULL;							\
-       (sym) = block_iter_match_next ((name), &(iter)))
+       (sym) = block_iter_match_next (&(iter)))
 
 /* Given a vector of pairs, allocate and build an obstack allocated
    blockranges struct for a block.  */
-- 
2.39.0