Eliminate catch_exceptions/catch_exceptions_with_msg

This patch gets rid of catch_exceptions / catch_exceptions_with_msg.
The latter is done mostly by getting rid of the three remaining
vestigial libgdb wrapper functions, which are really pointless
nowadays.  This results in a good number of simplifications.

(I checked that Insight doesn't use those functions.)

The gdb.mi/mi-pthreads.exp change is necessary because this actually
fixes a bug, IMO -- the patch stops MI's -thread-select causing output
on the CLI stream.

I.e., before:
 -thread-select 123456789
 &"Thread ID 123456789 not known.\n"
 ^error,msg="Thread ID 123456789 not known."
 (gdb)

After:
 -thread-select 123456789
 ^error,msg="Thread ID 123456789 not known."
 (gdb)

gdb/ChangeLog
2017-10-10  Pedro Alves <palves@redhat.com>
	    Tom Tromey  <tom@tromey.com>

	* breakpoint.c (struct captured_breakpoint_query_args)
	(do_captured_breakpoint_query, gdb_breakpoint_query): Delete.
	(print_breakpoint): New.
	* breakpoint.h (print_breakpoint): Declare.
	* common/common-exceptions.h (enum return_reason): Remove
	references to catch_exceptions.
	* exceptions.c (catch_exceptions, catch_exceptions_with_msg):
	Delete.
	* exceptions.h (catch_exceptions_ftype, catch_exceptions)
	(catch_exception_ftype, catch_exceptions_with_msg): Delete.
	* gdb.h: Delete.
	* gdbthread.h (thread_select): Declare.
	* mi/mi-cmd-break.c: Don't include gdb.h.
	(breakpoint_notify): Use print_breakpoint.
	* mi/mi-cmd-catch.c: Don't include gdb.h.
	* mi/mi-interp.c: Don't include gdb.h.
	(mi_print_breakpoint_for_event): New.
	(mi_breakpoint_created, mi_breakpoint_modified): Use
	mi_print_breakpoint_for_event.
	* mi/mi-main.c: Don't include gdb.h.
	(mi_cmd_thread_select): Parse the global thread ID here.  Use
	thread_select instead of gdb_thread_select.
	(mi_cmd_thread_list_ids): Output "thread-ids" tuple here instead
	of using gdb_list_thread_ids.
	* remote-fileio.c (do_remote_fileio_request): Change type.  Reply
	FILEIO_ENOSYS here.
	(remote_fileio_request): Use TRY/CATCH instead of
	catch_exceptions.
	* symfile-mem.c (struct symbol_file_add_from_memory_args)
	(symbol_file_add_from_memory_wrapper): Delete.
	(add_vsyscall_page): Use TRY/CATCH instead of catch_exceptions.
	* thread.c: Don't include gdb.h.
	(do_captured_list_thread_ids, gdb_list_thread_ids): Delete.
	(thread_alive): Use thread_select.
	(do_captured_thread_select): Delete, parts salvaged as ...
	(thread_select): ... this new function.
	(gdb_thread_select): Delete.

gdb/testsuite/ChangeLog
2017-10-10  Pedro Alves <palves@redhat.com>

	* gdb.mi/mi-pthreads.exp (check_mi_thread_command_set): Don't
	expect CLI output.

1 files changed, 34 insertions, 40 deletions

diff --git a/gdb/mi/mi-interp.c b/gdb/mi/mi-interp.c
index 714bb4b..d845a9c 100644
--- a/gdb/mi/mi-interp.c
+++ b/gdb/mi/mi-interp.c
@@ -33,7 +33,6 @@
 #include "observer.h"
 #include "gdbthread.h"
 #include "solist.h"
-#include "gdb.h"
 #include "objfiles.h"
 #include "tracepoint.h"
 #include "cli-out.h"
@@ -828,6 +827,38 @@ mi_tsv_modified (const struct trace_state_variable *tsv)
     }
 }
 
+/* Print breakpoint BP on MI's event channel.  */
+
+static void
+mi_print_breakpoint_for_event (struct mi_interp *mi, breakpoint *bp)
+{
+  ui_out *mi_uiout = interp_ui_out (mi);
+
+  /* We want the output from print_breakpoint to go to
+     mi->event_channel.  One approach would be to just call
+     print_breakpoint, and then use mi_out_put to send the current
+     content of mi_uiout into mi->event_channel.  However, that will
+     break if anything is output to mi_uiout prior to calling the
+     breakpoint_created notifications.  So, we use
+     ui_out_redirect.  */
+  mi_uiout->redirect (mi->event_channel);
+
+  TRY
+    {
+      scoped_restore restore_uiout
+	= make_scoped_restore (&current_uiout, mi_uiout);
+
+      print_breakpoint (bp);
+    }
+  CATCH (ex, RETURN_MASK_ALL)
+    {
+      exception_print (gdb_stderr, ex);
+    }
+  END_CATCH
+
+  mi_uiout->redirect (NULL);
+}
+
 /* Emit notification about a created breakpoint.  */
 
 static void
@@ -842,36 +873,16 @@ mi_breakpoint_created (struct breakpoint *b)
   SWITCH_THRU_ALL_UIS ()
     {
       struct mi_interp *mi = as_mi_interp (top_level_interpreter ());
-      struct ui_out *mi_uiout;
 
       if (mi == NULL)
 	continue;
 
-      mi_uiout = interp_ui_out (top_level_interpreter ());
-
       target_terminal::scoped_restore_terminal_state term_state;
       target_terminal::ours_for_output ();
 
       fprintf_unfiltered (mi->event_channel,
 			  "breakpoint-created");
-      /* We want the output from gdb_breakpoint_query to go to
-	 mi->event_channel.  One approach would be to just call
-	 gdb_breakpoint_query, and then use mi_out_put to send the current
-	 content of mi_uiout into mi->event_channel.  However, that will
-	 break if anything is output to mi_uiout prior to calling the
-	 breakpoint_created notifications.  So, we use
-	 ui_out_redirect.  */
-      mi_uiout->redirect (mi->event_channel);
-      TRY
-	{
-	  gdb_breakpoint_query (mi_uiout, b->number, NULL);
-	}
-      CATCH (e, RETURN_MASK_ERROR)
-	{
-	}
-      END_CATCH
-
-      mi_uiout->redirect (NULL);
+      mi_print_breakpoint_for_event (mi, b);
 
       gdb_flush (mi->event_channel);
     }
@@ -927,24 +938,7 @@ mi_breakpoint_modified (struct breakpoint *b)
       target_terminal::ours_for_output ();
       fprintf_unfiltered (mi->event_channel,
 			  "breakpoint-modified");
-      /* We want the output from gdb_breakpoint_query to go to
-	 mi->event_channel.  One approach would be to just call
-	 gdb_breakpoint_query, and then use mi_out_put to send the current
-	 content of mi_uiout into mi->event_channel.  However, that will
-	 break if anything is output to mi_uiout prior to calling the
-	 breakpoint_created notifications.  So, we use
-	 ui_out_redirect.  */
-      mi->mi_uiout->redirect (mi->event_channel);
-      TRY
-	{
-	  gdb_breakpoint_query (mi->mi_uiout, b->number, NULL);
-	}
-      CATCH (e, RETURN_MASK_ERROR)
-	{
-	}
-      END_CATCH
-
-      mi->mi_uiout->redirect (NULL);
+      mi_print_breakpoint_for_event (mi, b);
 
       gdb_flush (mi->event_channel);
     }