Add debug redirect option

Currently, when logging is enabled, output will be sent to both a
logfile and standard terminal output.  The redirect option sends output
only to the logfile.  This includes all debug output.

Add the option to redirect debug output seperately to normal
output, using the cli command:

  set logging debugredirect on

By setting this and enabling logging, all output and debug will
be sent to the logfile.  The user will still see all output but
no debug output.

This causes a change in behaviour for anyone currently using
logging redirect, as now only output will be redirected.  Users
will have to issue the additional command above to also redirect
debug.

Expand ui-redirect.exp cover the changes.

gdb/ChangeLog:

	* cli/cli-interp.c (struct saved_output_files): Add saved entry.
	(cli_interp_base::set_logging): Check debug_redirect.
	* cli/cli-interp.h (set_logging): Add debug_redirect parameter.
	* cli/cli-logging.c (debug_redirect): Add static variable.
	(pop_output_files): Add default param.
	(handle_redirections): Print debug setting.
	(show_logging_command): Likewise.
	(_initialize_cli_logging): Add debugredirect command.
	* interps.c (current_interp_set_logging): Add debug_redirect
	parameter.
	* interps.h (set_logging): Add debug_redirect parameter.
	(current_interp_set_logging): Likewise.
	* mi/mi-common.h: Likewise.
	* mi/mi-interp.c (mi_interp::set_logging): Likewise.

gdb/testsuite/ChangeLog:

	* gdb.base/ui-redirect.exp: Add debug redirect tests.

1 files changed, 20 insertions, 11 deletions

diff --git a/gdb/cli/cli-interp.c b/gdb/cli/cli-interp.c
index 7876f91..a8cf617 100644
--- a/gdb/cli/cli-interp.c
+++ b/gdb/cli/cli-interp.c
@@ -395,13 +395,15 @@ struct saved_output_files
   ui_file *log;
   ui_file *targ;
   ui_file *targerr;
+  ui_file *file_to_delete;
 };
 static saved_output_files saved_output;
 
 /* See cli-interp.h.  */
 
 void
-cli_interp_base::set_logging (ui_file_up logfile, bool logging_redirect)
+cli_interp_base::set_logging (ui_file_up logfile, bool logging_redirect,
+			      bool debug_redirect)
 {
   if (logfile != nullptr)
     {
@@ -411,28 +413,34 @@ cli_interp_base::set_logging (ui_file_up logfile, bool logging_redirect)
       saved_output.targ = gdb_stdtarg;
       saved_output.targerr = gdb_stdtargerr;
 
-      /* If logging is being redirected, then grab logfile.  */
+      /* If something is being redirected, then grab logfile.  */
       ui_file *logfile_p = nullptr;
-      if (logging_redirect)
-	logfile_p = logfile.release ();
+      if (logging_redirect || debug_redirect)
+	{
+	  logfile_p = logfile.get ();
+	  saved_output.file_to_delete = logfile_p;
+	}
 
-      /* If logging is not being redirected, then a tee containing both the
+      /* If something is not being redirected, then a tee containing both the
 	 logfile and stdout.  */
       ui_file *tee = nullptr;
-      if (!logging_redirect)
-	tee = new tee_file (gdb_stdout, std::move (logfile));
+      if (!logging_redirect || !debug_redirect)
+	{
+	  tee = new tee_file (gdb_stdout, std::move (logfile));
+	  saved_output.file_to_delete = tee;
+	}
 
       gdb_stdout = logging_redirect ? logfile_p : tee;
-      gdb_stdlog = logging_redirect ? logfile_p : tee;
+      gdb_stdlog = debug_redirect ? logfile_p : tee;
       gdb_stderr = logging_redirect ? logfile_p : tee;
       gdb_stdtarg = logging_redirect ? logfile_p : tee;
       gdb_stdtargerr = logging_redirect ? logfile_p : tee;
     }
   else
     {
-      /* Only delete one of the files -- they are all set to the same
-	 value.  */
-      delete gdb_stdout;
+      /* Delete the correct file.  If it's the tee then the logfile will also
+	 be deleted.  */
+      delete saved_output.file_to_delete;
 
       gdb_stdout = saved_output.out;
       gdb_stderr = saved_output.err;
@@ -445,6 +453,7 @@ cli_interp_base::set_logging (ui_file_up logfile, bool logging_redirect)
       saved_output.log = nullptr;
       saved_output.targ = nullptr;
       saved_output.targerr = nullptr;
+      saved_output.file_to_delete = nullptr;
     }
 }