Make gdb_flush also flush the wrap buffer

This changes gdb_flush to also flush the internal wrap buffer.  A few
places needed to continue using the previous approach, so this also
introduces ui_file_flush for those.

2020-02-05  Iain Buclaw  <ibuclaw@gdcproject.org>

        * gdb/event-loop.c (gdb_wait_for_event): Update.
        * gdb/printcmd.c (printf_command): Update.
        * gdb/remote-fileio.c (remote_fileio_func_write): Update.
        * gdb/remote-sim.c (gdb_os_flush_stdout): Update.
        (gdb_os_flush_stderr): Update.
        * gdb/remote.c (remote_console_output): Update.
        * gdb/ui-file.c (gdb_flush): Rename to...
        (ui_file_flush): ...this.
        (stderr_file::write): Update.
        (stderr_file::puts): Update.
        * gdb/ui-file.h (gdb_flush): Rename to...
        (ui_file_flush): ...this.
        * gdb/utils.c (gdb_flush): Add function.
        * gdb/utils.h (gdb_flush): Add declaration.

Change-Id: I7ca143d30f03dc39f218f6e880eb9bca9e15af39

gdb/ChangeLog

@@ -1,3 +1,20 @@
+2020-02-05  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+        * gdb/event-loop.c (gdb_wait_for_event): Update.
+        * gdb/printcmd.c (printf_command): Update.
+        * gdb/remote-fileio.c (remote_fileio_func_write): Update.
+        * gdb/remote-sim.c (gdb_os_flush_stdout): Update.
+        (gdb_os_flush_stderr): Update.
+        * gdb/remote.c (remote_console_output): Update.
+        * gdb/ui-file.c (gdb_flush): Rename to...
+        (ui_file_flush): ...this.
+        (stderr_file::write): Update.
+        (stderr_file::puts): Update.
+        * gdb/ui-file.h (gdb_flush): Rename to...
+        (ui_file_flush): ...this.
+        * gdb/utils.c (gdb_flush): Add function.
+        * gdb/utils.h (gdb_flush): Add declaration.
+
 2020-02-07  Tom Tromey  <tromey@adacore.com>
 
 	PR breakpoints/24915:

gdb/event-loop.c

@@ -750,8 +750,8 @@ gdb_wait_for_event (int block)
   int num_found = 0;
 
   /* Make sure all output is done before getting another event.  */
-  gdb_flush (gdb_stdout);
+  ui_file_flush (gdb_stdout);
-  gdb_flush (gdb_stderr);
+  ui_file_flush (gdb_stderr);
 
   if (gdb_notifier.num_fds == 0)
     return -1;

gdb/event-top.c

@@ -416,7 +416,7 @@ display_gdb_prompt (const char *new_prompt)
       /* Don't use a _filtered function here.  It causes the assumed
          character position to be off, since the newline we read from
          the user is not accounted for.  */
-      fputs_unfiltered (actual_gdb_prompt.c_str (), gdb_stdout);
+      fprintf_unfiltered (gdb_stdout, "%s", actual_gdb_prompt.c_str ());
       gdb_flush (gdb_stdout);
     }
 }

gdb/printcmd.c

@@ -2720,7 +2720,7 @@ printf_command (const char *arg, int from_tty)
   ui_printf (arg, gdb_stdout);
   reset_terminal_style (gdb_stdout);
   wrap_here ("");
-  gdb_flush (gdb_stdout);
+  ui_file_flush (gdb_stdout);
 }
 
 /* Implement the "eval" command.  */

gdb/remote-fileio.c

@@ -641,7 +641,7 @@ remote_fileio_func_write (remote_target *remote, char *buf)
       case FIO_FD_CONSOLE_OUT:
 	ui_file_write (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr,
 		       (char *) buffer, length);
-	gdb_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr);
+	ui_file_flush (target_fd == 1 ? gdb_stdtarg : gdb_stdtargerr);
 	ret = length;
 	break;
       default:

gdb/remote-sim.c

@@ -360,7 +360,7 @@ gdb_os_write_stdout (host_callback *p, const char *buf, int len)
 static void
 gdb_os_flush_stdout (host_callback *p)
 {
-  gdb_flush (gdb_stdtarg);
+  ui_file_flush (gdb_stdtarg);
 }
 
 /* GDB version of os_write_stderr callback.  */
@@ -385,7 +385,7 @@ gdb_os_write_stderr (host_callback *p, const char *buf, int len)
 static void
 gdb_os_flush_stderr (host_callback *p)
 {
-  gdb_flush (gdb_stdtargerr);
+  ui_file_flush (gdb_stdtargerr);
 }
 
 /* GDB version of printf_filtered callback.  */

gdb/remote.c

@@ -6847,7 +6847,7 @@ remote_console_output (const char *msg)
       tb[1] = 0;
       fputs_unfiltered (tb, gdb_stdtarg);
     }
-  gdb_flush (gdb_stdtarg);
+  ui_file_flush (gdb_stdtarg);
 }
 
 struct stop_reply : public notif_event

gdb/ui-file.c

@@ -91,7 +91,7 @@ null_file::write_async_safe (const char *buf, long sizeof_buf)
 
 
 void
-gdb_flush (struct ui_file *file)
+ui_file_flush (struct ui_file *file)
 {
   file->flush ();
 }
@@ -315,7 +315,7 @@ stdio_file::can_emit_style_escape ()
 void
 stderr_file::write (const char *buf, long length_buf)
 {
-  gdb_flush (gdb_stdout);
+  ui_file_flush (gdb_stdout);
   stdio_file::write (buf, length_buf);
 }
 
@@ -325,7 +325,7 @@ stderr_file::write (const char *buf, long length_buf)
 void
 stderr_file::puts (const char *linebuffer)
 {
-  gdb_flush (gdb_stdout);
+  ui_file_flush (gdb_stdout);
   stdio_file::puts (linebuffer);
 }
 

gdb/ui-file.h

@@ -100,7 +100,7 @@ public:
 /* A preallocated null_file stream.  */
 extern null_file null_stream;
 
-extern void gdb_flush (ui_file *);
+extern void ui_file_flush (ui_file *);
 
 extern int ui_file_isatty (struct ui_file *);
 

gdb/utils.c

@@ -1544,6 +1544,15 @@ flush_wrap_buffer (struct ui_file *stream)
     }
 }
 
+/* See utils.h.  */
+
+void
+gdb_flush (struct ui_file *stream)
+{
+  flush_wrap_buffer (stream);
+  ui_file_flush (stream);
+}
+
 /* Indicate that if the next sequence of characters overflows the line,
    a newline should be inserted here rather than when it hits the end.
    If INDENT is non-null, it is a string to be printed to indent the

gdb/utils.h

@@ -320,6 +320,12 @@ extern struct ui_file **current_ui_gdb_stdin_ptr (void);
 extern struct ui_file **current_ui_gdb_stderr_ptr (void);
 extern struct ui_file **current_ui_gdb_stdlog_ptr (void);
 
+/* Flush STREAM.  This is a wrapper for ui_file_flush that also
+   flushes any output pending from uses of the *_filtered output
+   functions; that output is kept in a special buffer so that
+   pagination and styling are handled properly.  */
+extern void gdb_flush (struct ui_file *);
+
 /* The current top level's ui_file streams.  */
 
 /* Normal results */