re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* files.c (_cpp_save_file_entries): Free result at the end.
	* pch.c (cpp_string_free): New function.
	(cpp_save_state): Use it in htab_create call.
	(cpp_write_pch_deps): Free ss->defs.  Destroy ss->definedhash.

From-SVN: r196394

libcpp/ChangeLog

+2013-03-01  Jakub Jelinek  <jakub@redhat.com>
+
+	PR middle-end/56461
+	* files.c (_cpp_save_file_entries): Free result at the end.
+	* pch.c (cpp_string_free): New function.
+	(cpp_save_state): Use it in htab_create call.
+	(cpp_write_pch_deps): Free ss->defs.  Destroy ss->definedhash.
+
 2013-02-28  Jakub Jelinek  <jakub@redhat.com>
 
 	* files.c (_cpp_find_file): If returning early, before storing

libcpp/files.c

@@ -1771,6 +1771,7 @@ _cpp_save_file_entries (cpp_reader *pfile, FILE *fp)
   struct pchf_data *result;
   size_t result_size;
   _cpp_file *f;
+  bool ret;
 
   for (f = pfile->all_files; f; f = f->next_file)
     ++count;
@@ -1827,7 +1828,9 @@ _cpp_save_file_entries (cpp_reader *pfile, FILE *fp)
   qsort (result->entries, result->count, sizeof (struct pchf_entry),
 	 pchf_save_compare);
 
-  return fwrite (result, result_size, 1, fp) == 1;
+  ret = fwrite (result, result_size, 1, fp) == 1;
+  free (result);
+  return ret;
 }
 
 /* Read the pchf_data structure from F.  */

libcpp/pch.c

@@ -187,6 +187,16 @@ cpp_string_eq (const void *a_p, const void *b_p)
 	  && memcmp (a->text, b->text, a->len) == 0);
 }
 
+/* Free memory associated with cpp_string.  */
+
+static void
+cpp_string_free (void *a_p)
+{
+  struct cpp_string *a = (struct cpp_string *) a_p;
+  free ((void *) a->text);
+  free (a);
+}
+
 /* Save the current definitions of the cpp_reader for dependency
    checking purposes.  When writing a precompiled header, this should
    be called at the same point in the compilation as cpp_valid_state
@@ -198,7 +208,7 @@ cpp_save_state (cpp_reader *r, FILE *f)
   /* Save the list of non-void identifiers for the dependency checking.  */
   r->savedstate = XNEW (struct cpp_savedstate);
   r->savedstate->definedhash = htab_create (100, cpp_string_hash,
-					    cpp_string_eq, NULL);
+					    cpp_string_eq, cpp_string_free);
   cpp_forall_identifiers (r, save_idents, r->savedstate);
 
   /* Write out the list of defined identifiers.  */
@@ -336,6 +346,8 @@ cpp_write_pch_deps (cpp_reader *r, FILE *f)
       return -1;
     }
   free (ss->definedstrs);
+  free (ss->defs);
+  htab_delete (ss->definedhash);
 
   /* Free the saved state.  */
   free (ss);