WebSVN – HelenOS – Blame – /branches/dynload/kernel/generic/include/udebug/udebug.h

Rev	Author	Line No.	Line
3438	svoboda	1	/*
		2	* Copyright (c) 2008 Jiri Svoboda
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup generic
		30	* @{
		31	*/
		32	/** @file
		33	*/
		34
		35	#ifndef KERN_UDEBUG_H_
		36	#define KERN_UDEBUG_H_
		37
		38	#include <ipc/ipc.h>
		39
		40	typedef enum { /* udebug_method_t */
		41
		42	/** Start debugging the recipient.
		43	* Causes all threads in the receiving task to stop. When they
		44	* are all stoped, an answer with retval 0 is generated.
		45	*/
		46	UDEBUG_M_BEGIN = 1,
		47
		48	/** Finish debugging the recipient.
		49	* Answers all pending GO and GUARD messages.
		50	*/
		51	UDEBUG_M_END,
		52
		53	/** Set which events should be captured.
		54	*/
		55	UDEBUG_M_SET_EVMASK,
		56
		57	/** Make sure the debugged task is still there.
		58	* This message is answered when the debugged task dies
		59	* or the debugging session ends.
		60	*/
		61	UDEBUG_M_GUARD,
		62
		63	/** Run a thread until a debugging event occurs.
		64	* This message is answered when the thread stops
		65	* in a debugging event.
		66	*
		67	* - ARG2 - id of the thread to run
		68	*/
		69	UDEBUG_M_GO,
		70
		71	/** Stop a thread being debugged.
		72	* Creates a special STOP event in the thread, causing
		73	* it to answer a pending GO message (if any).
		74	*/
		75	UDEBUG_M_STOP,
		76
		77	/** Read arguments of a syscall.
		78	*
		79	* - ARG2 - thread identification
		80	* - ARG3 - destination address in the caller's address space
		81	*
		82	*/
		83	UDEBUG_M_ARGS_READ,
		84
		85	/** Read the list of the debugged tasks's threads.
		86	*
		87	* - ARG2 - destination address in the caller's address space
		88	* - ARG3 - size of receiving buffer in bytes
		89	*
		90	* The kernel fills the buffer with a series of sysarg_t values
		91	* (thread ids). On answer, the kernel will set:
		92	*
		93	* - ARG2 - number of bytes that were actually copied
		94	* - ARG3 - number of bytes of the complete data
		95	*
		96	*/
		97	UDEBUG_M_THREAD_READ,
		98
		99	/** Read the debugged tasks's memory.
		100	*
		101	* - ARG2 - destination address in the caller's address space
		102	* - ARG3 - source address in the recipient's address space
		103	* - ARG4 - size of receiving buffer in bytes
		104	*
		105	*/
		106	UDEBUG_M_MEM_READ,
		107
		108	} udebug_method_t;
		109
		110
		111	typedef enum {
		112	UDEBUG_EVENT_FINISHED = 1, /*< Debuging session has finished /
		113	UDEBUG_EVENT_STOP, /*< Stopped on DEBUG_STOP request /
		114	UDEBUG_EVENT_SYSCALL_B, /*< Before beginning syscall execution /
		115	UDEBUG_EVENT_SYSCALL_E, /*< After finishing syscall execution /
		116	UDEBUG_EVENT_THREAD_B, /*< The task created a new thread /
		117	UDEBUG_EVENT_THREAD_E /*< A thread exited /
		118	} udebug_event_t;
		119
		120	#define UDEBUG_EVMASK(event) (1 << ((event) - 1))
		121
		122	typedef enum {
		123	UDEBUG_EM_FINISHED = UDEBUG_EVMASK(UDEBUG_EVENT_FINISHED),
		124	UDEBUG_EM_STOP = UDEBUG_EVMASK(UDEBUG_EVENT_STOP),
		125	UDEBUG_EM_SYSCALL_B = UDEBUG_EVMASK(UDEBUG_EVENT_SYSCALL_B),
		126	UDEBUG_EM_SYSCALL_E = UDEBUG_EVMASK(UDEBUG_EVENT_SYSCALL_E),
		127	UDEBUG_EM_THREAD_B = UDEBUG_EVMASK(UDEBUG_EVENT_THREAD_B),
		128	UDEBUG_EM_THREAD_E = UDEBUG_EVMASK(UDEBUG_EVENT_THREAD_E),
		129	UDEBUG_EM_ALL =
		130	UDEBUG_EVMASK(UDEBUG_EVENT_FINISHED) \|
		131	UDEBUG_EVMASK(UDEBUG_EVENT_STOP) \|
		132	UDEBUG_EVMASK(UDEBUG_EVENT_SYSCALL_B) \|
		133	UDEBUG_EVMASK(UDEBUG_EVENT_SYSCALL_E) \|
		134	UDEBUG_EVMASK(UDEBUG_EVENT_THREAD_B) \|
		135	UDEBUG_EVMASK(UDEBUG_EVENT_THREAD_E)
		136	} udebug_evmask_t;
		137
		138	#ifdef KERNEL
		139
		140	#include <synch/mutex.h>
		141	#include <arch/interrupt.h>
		142	#include <atomic.h>
		143
		144	typedef enum {
		145	/** Task is not being debugged */
		146	UDEBUG_TS_INACTIVE,
		147	/** BEGIN operation in progress (waiting for threads to stop) */
		148	UDEBUG_TS_BEGINNING,
		149	/** Debugger fully connected */
		150	UDEBUG_TS_ACTIVE,
		151	/** Task is shutting down, no more debug activities allowed */
		152	UDEBUG_TS_SHUTDOWN
		153	} udebug_task_state_t;
		154
		155	/** Debugging part of task_t structure.
		156	*/
		157	typedef struct {
		158	/** Synchronize debug ops on this task / access to this structure */
		159	mutex_t lock;
		160	char *lock_owner;
		161
		162	udebug_task_state_t dt_state;
		163	call_t *begin_call;
		164	int not_stoppable_count;
		165	struct task *debugger;
		166	udebug_evmask_t evmask;
		167	} udebug_task_t;
		168
		169	/** Debugging part of thread_t structure.
		170	*/
		171	typedef struct {
		172	/**
		173	* Prevent deadlock with udebug_before_thread_runs() in interrupt
		174	* handler, without actually disabling interrupts.
		175	* ==0 means "unlocked", >0 means "locked"
		176	*/
		177	atomic_t int_lock;
		178
		179	/** Synchronize debug ops on this thread / access to this structure */
		180	mutex_t lock;
		181
		182	waitq_t go_wq;
		183	call_t *go_call;
		184	unative_t syscall_args[6];
		185
		186	/** What type of event are we stopped in or 0 if none */
		187	udebug_event_t cur_event;
		188	bool stop;
		189	bool stoppable;
		190	bool debug_active; /*< In a debugging session /
		191	} udebug_thread_t;
		192
		193	struct task;
		194	struct thread;
		195
		196	void udebug_task_init(udebug_task_t *ut);
		197	void udebug_thread_initialize(udebug_thread_t *ut);
		198
		199	void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
		200	unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc,
		201	bool end_variant);
		202
		203	void udebug_thread_b_event(struct thread *t);
		204	void udebug_thread_e_event(void);
		205
		206	void udebug_stoppable_begin(void);
		207	void udebug_stoppable_end(void);
		208
		209	void udebug_before_thread_runs(void);
		210
		211	int udebug_task_cleanup(struct task *ta);
		212
		213	#endif
		214
		215	#endif
		216
		217	/** @}
		218	*/

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