Use gdb::unique_xmalloc_ptr when calling tilde_expand

This patch changes most sites calling tilde_expand to use
gdb::unique_xmalloc_ptr, rather than a cleanup.  It also changes
scan_expression_with_cleanup to return a unique pointer, because the
patch was already touching code in that area.

Regression tested on the buildbot.

ChangeLog
2017-08-05  Tom Tromey  <tom@tromey.com>

	* compile/compile-object-load.c (compile_object_load): Use
	gdb::unique_xmalloc_ptr.
	* cli/cli-dump.c (scan_filename): Rename from
	scan_filename_with_cleanup.  Change return type.
	(scan_expression): Rename from scan_expression_with_cleanup.
	Change return type.
	(dump_memory_to_file, dump_value_to_file, restore_command):
	Use gdb::unique_xmalloc_ptr.  Update.
	* cli/cli-cmds.c (find_and_open_script): Use
	gdb::unique_xmalloc_ptr.
	* tracefile-tfile.c (tfile_open): Use gdb::unique_xmalloc_ptr.
	* symmisc.c (maintenance_print_symbols)
	(maintenance_print_msymbols): Use gdb::unique_xmalloc_ptr.
	* symfile.c (symfile_bfd_open, generic_load)
	(add_symbol_file_command, remove_symbol_file_command): Use
	gdb::unique_xmalloc_ptr.
	* source.c (openp): Use gdb::unique_xmalloc_ptr.
	* psymtab.c (maintenance_print_psymbols): Use
	gdb::unique_xmalloc_ptr.
	* corelow.c (core_open): Use gdb::unique_xmalloc_ptr.
	* breakpoint.c (save_breakpoints): Use gdb::unique_xmalloc_ptr.
	* solib.c (solib_map_sections): Use gdb::unique_xmalloc_ptr.
	(reload_shared_libraries_1): Likewise.

1 files changed, 13 insertions, 12 deletions

diff --git a/gdb/compile/compile-object-load.c b/gdb/compile/compile-object-load.c
index 473e664..41d5fc3 100644
--- a/gdb/compile/compile-object-load.c
+++ b/gdb/compile/compile-object-load.c
@@ -624,44 +624,45 @@ compile_object_load (const compile_file_names &file_names,
   unsigned dptr_type_len = TYPE_LENGTH (dptr_type);
   struct compile_module *retval;
   struct type *regs_type, *out_value_type = NULL;
-  char *filename, **matching;
+  char **matching;
   struct objfile *objfile;
   int expect_parameters;
   struct type *expect_return_type;
   struct munmap_list *munmap_list_head = NULL;
 
-  filename = tilde_expand (file_names.object_file ());
-  cleanups = make_cleanup (xfree, filename);
+  gdb::unique_xmalloc_ptr<char> filename
+    (tilde_expand (file_names.object_file ()));
 
-  gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename, gnutarget, -1));
+  gdb_bfd_ref_ptr abfd (gdb_bfd_open (filename.get (), gnutarget, -1));
   if (abfd == NULL)
     error (_("\"%s\": could not open as compiled module: %s"),
-          filename, bfd_errmsg (bfd_get_error ()));
+          filename.get (), bfd_errmsg (bfd_get_error ()));
 
   if (!bfd_check_format_matches (abfd.get (), bfd_object, &matching))
     error (_("\"%s\": not in loadable format: %s"),
-          filename, gdb_bfd_errmsg (bfd_get_error (), matching));
+          filename.get (), gdb_bfd_errmsg (bfd_get_error (), matching));
 
   if ((bfd_get_file_flags (abfd.get ()) & (EXEC_P | DYNAMIC)) != 0)
-    error (_("\"%s\": not in object format."), filename);
+    error (_("\"%s\": not in object format."), filename.get ());
 
   setup_sections_data.last_size = 0;
   setup_sections_data.last_section_first = abfd->sections;
   setup_sections_data.last_prot = -1;
   setup_sections_data.last_max_alignment = 1;
   setup_sections_data.munmap_list_headp = &munmap_list_head;
-  make_cleanup (munmap_listp_free_cleanup, &munmap_list_head);
+  cleanups = make_cleanup (munmap_listp_free_cleanup, &munmap_list_head);
   bfd_map_over_sections (abfd.get (), setup_sections, &setup_sections_data);
   setup_sections (abfd.get (), NULL, &setup_sections_data);
 
   storage_needed = bfd_get_symtab_upper_bound (abfd.get ());
   if (storage_needed < 0)
     error (_("Cannot read symbols of compiled module \"%s\": %s"),
-          filename, bfd_errmsg (bfd_get_error ()));
+          filename.get (), bfd_errmsg (bfd_get_error ()));
 
   /* SYMFILE_VERBOSE is not passed even if FROM_TTY, user is not interested in
      "Reading symbols from ..." message for automatically generated file.  */
-  objfile = symbol_file_add_from_bfd (abfd.get (), filename, 0, NULL, 0, NULL);
+  objfile = symbol_file_add_from_bfd (abfd.get (), filename.get (),
+				      0, NULL, 0, NULL);
   cleanups_free_objfile = make_cleanup_free_objfile (objfile);
 
   func_sym = lookup_global_symbol_from_objfile (objfile,
@@ -713,7 +714,7 @@ compile_object_load (const compile_file_names &file_names,
   number_of_symbols = bfd_canonicalize_symtab (abfd.get (), symbol_table);
   if (number_of_symbols < 0)
     error (_("Cannot parse symbols of compiled module \"%s\": %s"),
-          filename, bfd_errmsg (bfd_get_error ()));
+          filename.get (), bfd_errmsg (bfd_get_error ()));
 
   missing_symbols = 0;
   for (symp = symbol_table; symp < symbol_table + number_of_symbols; symp++)
@@ -762,7 +763,7 @@ compile_object_load (const compile_file_names &file_names,
 	default:
 	  warning (_("Could not find symbol \"%s\" "
 		     "for compiled module \"%s\"."),
-		   sym->name, filename);
+		   sym->name, filename.get ());
 	  missing_symbols++;
 	}
     }