mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
/* Thread command's finish-state machine, for GDB, the GNU debugger.
|
|
Copyright (C) 2015-2020 Free Software Foundation, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program 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 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef THREAD_FSM_H
|
|
#define THREAD_FSM_H
|
|
|
|
#include "mi/mi-common.h" /* For enum async_reply_reason. */
|
|
|
|
struct return_value_info;
|
|
struct thread_fsm_ops;
|
|
|
|
/* A thread finite-state machine structure contains the necessary info
|
|
and callbacks to manage the state machine protocol of a thread's
|
|
execution command. */
|
|
|
|
struct thread_fsm
|
|
{
|
|
explicit thread_fsm (struct interp *cmd_interp)
|
|
: command_interp (cmd_interp)
|
|
{
|
|
}
|
|
|
|
/* The destructor. This should simply free heap allocated data
|
|
structures. Cleaning up target resources (like, e.g.,
|
|
breakpoints) should be done in the clean_up method. */
|
|
virtual ~thread_fsm () = default;
|
|
|
|
DISABLE_COPY_AND_ASSIGN (thread_fsm);
|
|
|
|
/* Called to clean up target resources after the FSM. E.g., if the
|
|
FSM created internal breakpoints, this is where they should be
|
|
deleted. */
|
|
virtual void clean_up (struct thread_info *thread)
|
|
{
|
|
}
|
|
|
|
/* Called after handle_inferior_event decides the target is done
|
|
(that is, after stop_waiting). The FSM is given a chance to
|
|
decide whether the command is done and thus the target should
|
|
stop, or whether there's still more to do and thus the thread
|
|
should be re-resumed. This is a good place to cache target data
|
|
too. For example, the "finish" command saves the just-finished
|
|
function's return value here. */
|
|
virtual bool should_stop (struct thread_info *thread) = 0;
|
|
|
|
/* If this FSM saved a function's return value, you can use this
|
|
method to retrieve it. Otherwise, this returns NULL. */
|
|
virtual struct return_value_info *return_value ()
|
|
{
|
|
return nullptr;
|
|
}
|
|
|
|
enum async_reply_reason async_reply_reason ()
|
|
{
|
|
/* If we didn't finish, then the stop reason must come from
|
|
elsewhere. E.g., a breakpoint hit or a signal intercepted. */
|
|
gdb_assert (finished_p ());
|
|
return do_async_reply_reason ();
|
|
}
|
|
|
|
/* Whether the stop should be notified to the user/frontend. */
|
|
virtual bool should_notify_stop ()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
void set_finished ()
|
|
{
|
|
finished = true;
|
|
}
|
|
|
|
bool finished_p () const
|
|
{
|
|
return finished;
|
|
}
|
|
|
|
/* The interpreter that issued the execution command that caused
|
|
this thread to resume. If the top level interpreter is MI/async,
|
|
and the execution command was a CLI command (next/step/etc.),
|
|
we'll want to print stop event output to the MI console channel
|
|
(the stepped-to line, etc.), as if the user entered the execution
|
|
command on a real GDB console. */
|
|
struct interp *command_interp = nullptr;
|
|
|
|
protected:
|
|
|
|
/* Whether the FSM is done successfully. */
|
|
bool finished = false;
|
|
|
|
/* The async_reply_reason that is broadcast to MI clients if this
|
|
FSM finishes successfully. */
|
|
virtual enum async_reply_reason do_async_reply_reason ()
|
|
{
|
|
gdb_assert_not_reached (_("should not call async_reply_reason here"));
|
|
}
|
|
};
|
|
|
|
#endif /* THREAD_FSM_H */
|