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|
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Jerome Vouillon, projet Cristal, INRIA Rocquencourt *)
(* OCaml port by John Malecki and Xavier Leroy *)
(* *)
(* Copyright 1996 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* All rights reserved. This file is distributed under the terms of *)
(* the GNU Lesser General Public License version 2.1, with the *)
(* special exception on linking described in the file LICENSE. *)
(* *)
(**************************************************************************)
(*************************** Checkpoints *******************************)
open Int64ops
open Debugcom
open Primitives
(*** A type for checkpoints. ***)
type checkpoint_state =
C_stopped
| C_running of int64
(* `c_valid' is true if and only if the corresponding
* process is connected to the debugger.
* `c_parent' is the checkpoint whose process is parent
* of the checkpoint one (`root' if no parent).
* c_pid = -2 for root pseudo-checkpoint.
* c_pid = 0 for ghost checkpoints.
* c_pid = -1 for kill checkpoints.
*)
type checkpoint = {
mutable c_time : int64;
mutable c_pid : int;
mutable c_fd : io_channel;
mutable c_valid : bool;
mutable c_report : report option;
mutable c_state : checkpoint_state;
mutable c_parent : checkpoint;
mutable c_breakpoint_version : int;
mutable c_breakpoints : (pc * int ref) list;
mutable c_trap_barrier : Sp.t;
mutable c_code_fragments : int list
}
(*** Pseudo-checkpoint `root'. ***)
(* --- Parents of all checkpoints which have no parent. *)
let rec root = {
c_time = _0;
c_pid = -2;
c_fd = std_io;
c_valid = false;
c_report = None;
c_state = C_stopped;
c_parent = root;
c_breakpoint_version = 0;
c_breakpoints = [];
c_trap_barrier = Sp.null;
c_code_fragments = [main_frag]
}
(*** Current state ***)
let checkpoints =
ref ([] : checkpoint list)
let current_checkpoint =
ref root
let current_time () =
!current_checkpoint.c_time
let current_report () =
!current_checkpoint.c_report
let current_pc_sp () =
(* This pattern matching mimics the test used in debugger.c for
deciding whether or not PC/SP should be sent with the report.
See debugger.c, the [if] statement above the [command_loop]
label. *)
match current_report () with
| Some {rep_type = Event | Breakpoint;
rep_program_pointer = pc; rep_stack_pointer = sp } -> Some (pc, sp)
| _ -> None
let current_pc () = Option.map fst (current_pc_sp ())
|
