source: mainline/kernel/generic/include/udebug/udebug.h@ d1e8440

/*
 * Copyright (c) 2008 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup generic
 * @{
 */
/** @file
 */

#ifndef KERN_UDEBUG_H_
#define KERN_UDEBUG_H_

#include <abi/udebug.h>
#include <ipc/ipc.h>
#include <synch/mutex.h>
#include <synch/condvar.h>
#include <arch/interrupt.h>
#include <atomic.h>

typedef enum {
        /** Task is not being debugged */
        UDEBUG_TS_INACTIVE,
        /** BEGIN operation in progress (waiting for threads to stop) */
        UDEBUG_TS_BEGINNING,
        /** Debugger fully connected */
        UDEBUG_TS_ACTIVE
} udebug_task_state_t;

/** Debugging part of task_t structure.
 */
typedef struct {
        /** Synchronize debug ops on this task / access to this structure */
        mutex_t lock;
        char *lock_owner;
        
        udebug_task_state_t dt_state;
        call_t *begin_call;
        int not_stoppable_count;
        struct task *debugger;
        udebug_evmask_t evmask;
} udebug_task_t;

/** Debugging part of thread_t structure.
 */
typedef struct {
        /** Synchronize debug ops on this thread / access to this structure. */
        mutex_t lock;
        
        waitq_t go_wq;
        call_t *go_call;
        sysarg_t syscall_args[6];
        istate_t *uspace_state;
        
        /** What type of event are we stopped in or 0 if none. */
        udebug_event_t cur_event;
        bool go;         /**< Thread is GO */
        bool stoppable;  /**< Thread is stoppable */
        bool active;     /**< Thread is in a debugging session */
        condvar_t active_cv;
} udebug_thread_t;

struct task;
struct thread;

void udebug_task_init(udebug_task_t *);
void udebug_thread_initialize(udebug_thread_t *);

void udebug_syscall_event(sysarg_t, sysarg_t, sysarg_t, sysarg_t, sysarg_t,
    sysarg_t, sysarg_t, sysarg_t, bool);

void udebug_thread_b_event_attach(struct thread *, struct task *);
void udebug_thread_e_event(void);

void udebug_stoppable_begin(void);
void udebug_stoppable_end(void);

void udebug_before_thread_runs(void);

int udebug_task_cleanup(struct task *);
void udebug_thread_fault(void);

#endif

/** @}
 */