gdb: replace `get_exec_file (0)` calls with `current_program_space->exec_filename ()`

Calls of `get_exec_file (0)` are equivalent to just getting the exec
filename from the current program space.  I'm looking to remove
`get_exec_file`, so replace these uses with
`current_program_space->exec_filename ()`.

Remove the `err` parameter of `get_exec_wrapper` since all the calls
that remain pass 1, meaning to error out if no executable is specified.

Change-Id: I7729ea4c7f03dbb046211cc5aa3858ab3a551965
Approved-By: Tom Tromey <tom@tromey.com>

1 files changed, 3 insertions, 3 deletions

diff --git a/gdb/exec.c b/gdb/exec.c
index 4fe4d3b..496f3b1 100644
--- a/gdb/exec.c
+++ b/gdb/exec.c
@@ -215,7 +215,7 @@ validate_exec_file (int from_tty)
   if (exec_file_mismatch_mode == exec_file_mismatch_off)
     return;
 
-  const char *current_exec_file = get_exec_file (0);
+  const char *current_exec_file = current_program_space->exec_filename ();
   struct inferior *inf = current_inferior ();
   /* Try to determine a filename from the process itself.  */
   const char *pid_exec_file = target_pid_to_exec_file (inf->pid);
@@ -233,7 +233,7 @@ validate_exec_file (int from_tty)
      did not change).  If exec file changed, reopen_exec_file has
      allocated another file name, so get_exec_file again.  */
   reopen_exec_file ();
-  current_exec_file = get_exec_file (0);
+  current_exec_file = current_program_space->exec_filename ();
 
   const bfd_build_id *exec_file_build_id
     = build_id_bfd_get (current_program_space->exec_bfd ());
@@ -314,7 +314,7 @@ exec_file_locate_attach (int pid, int defer_bp_reset, int from_tty)
   symfile_add_flags add_flags = 0;
 
   /* Do nothing if we already have an executable filename.  */
-  if (get_exec_file (0) != NULL)
+  if (current_program_space->exec_filename () != nullptr)
     return;
 
   /* Try to determine a filename from the process itself.  */