WebSVN – HelenOS – Blame – //branches/dd/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 */
3622	svoboda	150	UDEBUG_TS_ACTIVE
3438	svoboda	151	} udebug_task_state_t;
		152
		153	/** Debugging part of task_t structure.
		154	*/
		155	typedef struct {
		156	/** Synchronize debug ops on this task / access to this structure */
		157	mutex_t lock;
		158	char *lock_owner;
		159
		160	udebug_task_state_t dt_state;
		161	call_t *begin_call;
		162	int not_stoppable_count;
		163	struct task *debugger;
		164	udebug_evmask_t evmask;
		165	} udebug_task_t;
		166
		167	/** Debugging part of thread_t structure.
		168	*/
		169	typedef struct {
3600	svoboda	170	/** Synchronize debug ops on this thread / access to this structure. */
3438	svoboda	171	mutex_t lock;
		172
		173	waitq_t go_wq;
		174	call_t *go_call;
		175	unative_t syscall_args[6];
3613	svoboda	176	istate_t *uspace_state;
3438	svoboda	177
3600	svoboda	178	/** What type of event are we stopped in or 0 if none. */
3601	svoboda	179	udebug_event_t cur_event;
3683	svoboda	180	bool go; /*< thread is GO /
		181	bool stoppable; /*< thread is stoppable /
		182	bool active; /*< thread is in a debugging session /
3438	svoboda	183	} udebug_thread_t;
		184
		185	struct task;
		186	struct thread;
		187
		188	void udebug_task_init(udebug_task_t *ut);
		189	void udebug_thread_initialize(udebug_thread_t *ut);
		190
		191	void udebug_syscall_event(unative_t a1, unative_t a2, unative_t a3,
		192	unative_t a4, unative_t a5, unative_t a6, unative_t id, unative_t rc,
		193	bool end_variant);
		194
3617	svoboda	195	void udebug_thread_b_event_attach(struct thread t, struct task ta);
3438	svoboda	196	void udebug_thread_e_event(void);
		197
		198	void udebug_stoppable_begin(void);
		199	void udebug_stoppable_end(void);
		200
		201	void udebug_before_thread_runs(void);
		202
		203	int udebug_task_cleanup(struct task *ta);
		204
		205	#endif
		206
		207	#endif
		208
		209	/** @}
		210	*/

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