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(* gdbif.mod enable interactive connectivity with gdb.
Copyright (C) 2011-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE gdbif ;
FROM libc IMPORT printf, getpid, sleep ;
FROM FIO IMPORT File, WriteString, WriteLine, OpenToWrite, Close, IsNoError ;
FROM StringConvert IMPORT itos ;
FROM DynamicStrings IMPORT String, KillString ;
IMPORT SFIO ;
VAR
invoked,
mustWait: BOOLEAN ;
(*
connectSpin - breakpoint placeholder.
*)
PROCEDURE connectSpin ;
BEGIN
(* do nothing, its purpose is to allow gdb to set breakpoints here. *)
END connectSpin ;
(*
sleepSpin - waits for the boolean variable mustWait to become FALSE.
It sleeps for a second between each test of the variable.
*)
PROCEDURE sleepSpin ;
BEGIN
IF mustWait
THEN
printf ("process %d is waiting for you to:\n", getpid ());
printf ("(gdb) attach %d\n", getpid ());
printf ("(gdb) break connectSpin\n");
printf ("(gdb) print finishSpin()\n");
REPEAT
sleep (1);
printf (".")
UNTIL NOT mustWait ;
printf ("ok continuing\n");
connectSpin
END
END sleepSpin ;
(*
finishSpin - sets boolean mustWait to FALSE.
*)
PROCEDURE finishSpin ;
BEGIN
mustWait := FALSE
END finishSpin ;
(*
gdbinit -
*)
PROCEDURE gdbinit ;
VAR
file: File ;
s : String ;
BEGIN
file := OpenToWrite (".gdbinit") ;
IF IsNoError (file)
THEN
WriteString (file, "attach ") ;
s := SFIO.WriteS (file, itos (getpid (), 6, " ", FALSE)) ;
WriteString (file, "break connectSpin") ; WriteLine (file) ;
WriteString (file, "print finishSpin()") ; WriteLine (file) ;
s := KillString (s) ;
Close (file) ;
sleepSpin
END
END gdbinit ;
BEGIN
mustWait := TRUE
END gdbif.
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