[lttng-tools.git] / src / common / lttng-kernel.h

/*
 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *                      David Goulet <david.goulet@polymtl.ca>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * 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, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _LTTNG_KERNEL_H
#define _LTTNG_KERNEL_H

#include <stdint.h>
#include <common/macros.h>

#define LTTNG_KERNEL_SYM_NAME_LEN  256

/*
 * LTTng DebugFS ABI structures.
 *
 * This is the kernel ABI copied from lttng-modules tree.
 */

enum lttng_kernel_instrumentation {
	LTTNG_KERNEL_ALL           = -1,   /* Used within lttng-tools */
	LTTNG_KERNEL_TRACEPOINT    = 0,
	LTTNG_KERNEL_KPROBE        = 1,
	LTTNG_KERNEL_FUNCTION      = 2,
	LTTNG_KERNEL_KRETPROBE     = 3,
	LTTNG_KERNEL_NOOP          = 4,    /* not hooked */
	LTTNG_KERNEL_SYSCALL       = 5,
};

enum lttng_kernel_context_type {
	LTTNG_KERNEL_CONTEXT_PID            = 0,
	LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
	LTTNG_KERNEL_CONTEXT_PROCNAME       = 2,
	LTTNG_KERNEL_CONTEXT_PRIO           = 3,
	LTTNG_KERNEL_CONTEXT_NICE           = 4,
	LTTNG_KERNEL_CONTEXT_VPID           = 5,
	LTTNG_KERNEL_CONTEXT_TID            = 6,
	LTTNG_KERNEL_CONTEXT_VTID           = 7,
	LTTNG_KERNEL_CONTEXT_PPID           = 8,
	LTTNG_KERNEL_CONTEXT_VPPID          = 9,
	LTTNG_KERNEL_CONTEXT_HOSTNAME       = 10,
	LTTNG_KERNEL_CONTEXT_CPU_ID         = 11,
	LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE  = 12,
	LTTNG_KERNEL_CONTEXT_PREEMPTIBLE    = 13,
	LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
	LTTNG_KERNEL_CONTEXT_MIGRATABLE     = 15,
	LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
	LTTNG_KERNEL_CONTEXT_CALLSTACK_USER   = 17,
};

/* Perf counter attributes */
struct lttng_kernel_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_KERNEL_SYM_NAME_LEN];
} LTTNG_PACKED;

/* Event/Channel context */
#define LTTNG_KERNEL_CONTEXT_PADDING1  16
#define LTTNG_KERNEL_CONTEXT_PADDING2  LTTNG_KERNEL_SYM_NAME_LEN + 32
struct lttng_kernel_context {
	enum lttng_kernel_context_type ctx;
	char padding[LTTNG_KERNEL_CONTEXT_PADDING1];

	union {
		struct lttng_kernel_perf_counter_ctx perf_counter;
		char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
	} u;
} LTTNG_PACKED;

struct lttng_kernel_kretprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
} LTTNG_PACKED;

/*
 * Either addr is used, or symbol_name and offset.
 */
struct lttng_kernel_kprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
} LTTNG_PACKED;

/* Function tracer */
struct lttng_kernel_function {
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
} LTTNG_PACKED;

#define LTTNG_KERNEL_EVENT_PADDING1    16
#define LTTNG_KERNEL_EVENT_PADDING2    LTTNG_KERNEL_SYM_NAME_LEN + 32
struct lttng_kernel_event {
	char name[LTTNG_KERNEL_SYM_NAME_LEN];
	enum lttng_kernel_instrumentation instrumentation;
	char padding[LTTNG_KERNEL_EVENT_PADDING1];

	/* Per instrumentation type configuration */
	union {
		struct lttng_kernel_kretprobe kretprobe;
		struct lttng_kernel_kprobe kprobe;
		struct lttng_kernel_function ftrace;
		char padding[LTTNG_KERNEL_EVENT_PADDING2];
	} u;
} LTTNG_PACKED;

struct lttng_kernel_tracer_version {
	uint32_t major;
	uint32_t minor;
	uint32_t patchlevel;
} LTTNG_PACKED;

struct lttng_kernel_tracer_abi_version {
	uint32_t major;
	uint32_t minor;
} LTTNG_PACKED;

struct lttng_kernel_syscall_mask {
	uint32_t len;	/* in bits */
	char mask[];
} LTTNG_PACKED;

/*
 * kernel channel
 */
#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
struct lttng_kernel_channel {
	uint64_t subbuf_size;               /* bytes */
	uint64_t num_subbuf;                /* power of 2 */
	unsigned int switch_timer_interval; /* usec */
	unsigned int read_timer_interval;   /* usec */
	enum lttng_event_output output;     /* splice, mmap */

	int overwrite;                      /* 1: overwrite, 0: discard */
	char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
} LTTNG_PACKED;

#define KERNEL_FILTER_BYTECODE_MAX_LEN		65536
struct lttng_kernel_filter_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char data[0];
} LTTNG_PACKED;

#endif /* _LTTNG_KERNEL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	* David Goulet <david.goulet@polymtl.ca>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License, version 2 only,
	8	* as published by the Free Software Foundation.
	9	*
	10	* This program is distributed in the hope that it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14	*
	15	* You should have received a copy of the GNU General Public License along
	16	* with this program; if not, write to the Free Software Foundation, Inc.,
	17	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	18	*/
	19
	20	#ifndef _LTTNG_KERNEL_H
	21	#define _LTTNG_KERNEL_H
	22
	23	#include <stdint.h>
	24	#include <common/macros.h>
	25
	26	#define LTTNG_KERNEL_SYM_NAME_LEN 256
	27
	28	/*
	29	* LTTng DebugFS ABI structures.
	30	*
	31	* This is the kernel ABI copied from lttng-modules tree.
	32	*/
	33
	34	enum lttng_kernel_instrumentation {
	35	LTTNG_KERNEL_ALL = -1, /* Used within lttng-tools */
	36	LTTNG_KERNEL_TRACEPOINT = 0,
	37	LTTNG_KERNEL_KPROBE = 1,
	38	LTTNG_KERNEL_FUNCTION = 2,
	39	LTTNG_KERNEL_KRETPROBE = 3,
	40	LTTNG_KERNEL_NOOP = 4, /* not hooked */
	41	LTTNG_KERNEL_SYSCALL = 5,
	42	};
	43
	44	enum lttng_kernel_context_type {
	45	LTTNG_KERNEL_CONTEXT_PID = 0,
	46	LTTNG_KERNEL_CONTEXT_PERF_CPU_COUNTER = 1,
	47	LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
	48	LTTNG_KERNEL_CONTEXT_PRIO = 3,
	49	LTTNG_KERNEL_CONTEXT_NICE = 4,
	50	LTTNG_KERNEL_CONTEXT_VPID = 5,
	51	LTTNG_KERNEL_CONTEXT_TID = 6,
	52	LTTNG_KERNEL_CONTEXT_VTID = 7,
	53	LTTNG_KERNEL_CONTEXT_PPID = 8,
	54	LTTNG_KERNEL_CONTEXT_VPPID = 9,
	55	LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
	56	LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
	57	LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
	58	LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
	59	LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
	60	LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
	61	LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
	62	LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
	63	};
	64
	65	/* Perf counter attributes */
	66	struct lttng_kernel_perf_counter_ctx {
	67	uint32_t type;
	68	uint64_t config;
	69	char name[LTTNG_KERNEL_SYM_NAME_LEN];
	70	} LTTNG_PACKED;
	71
	72	/* Event/Channel context */
	73	#define LTTNG_KERNEL_CONTEXT_PADDING1 16
	74	#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	75	struct lttng_kernel_context {
	76	enum lttng_kernel_context_type ctx;
	77	char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
	78
	79	union {
	80	struct lttng_kernel_perf_counter_ctx perf_counter;
	81	char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
	82	} u;
	83	} LTTNG_PACKED;
	84
	85	struct lttng_kernel_kretprobe {
	86	uint64_t addr;
	87
	88	uint64_t offset;
	89	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	90	} LTTNG_PACKED;
	91
	92	/*
	93	* Either addr is used, or symbol_name and offset.
	94	*/
	95	struct lttng_kernel_kprobe {
	96	uint64_t addr;
	97
	98	uint64_t offset;
	99	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	100	} LTTNG_PACKED;
	101
	102	/* Function tracer */
	103	struct lttng_kernel_function {
	104	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	105	} LTTNG_PACKED;
	106
	107	#define LTTNG_KERNEL_EVENT_PADDING1 16
	108	#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	109	struct lttng_kernel_event {
	110	char name[LTTNG_KERNEL_SYM_NAME_LEN];
	111	enum lttng_kernel_instrumentation instrumentation;
	112	char padding[LTTNG_KERNEL_EVENT_PADDING1];
	113
	114	/* Per instrumentation type configuration */
	115	union {
	116	struct lttng_kernel_kretprobe kretprobe;
	117	struct lttng_kernel_kprobe kprobe;
	118	struct lttng_kernel_function ftrace;
	119	char padding[LTTNG_KERNEL_EVENT_PADDING2];
	120	} u;
	121	} LTTNG_PACKED;
	122
	123	struct lttng_kernel_tracer_version {
	124	uint32_t major;
	125	uint32_t minor;
	126	uint32_t patchlevel;
	127	} LTTNG_PACKED;
	128
	129	struct lttng_kernel_tracer_abi_version {
	130	uint32_t major;
	131	uint32_t minor;
	132	} LTTNG_PACKED;
	133
	134	struct lttng_kernel_syscall_mask {
	135	uint32_t len; /* in bits */
	136	char mask[];
	137	} LTTNG_PACKED;
	138
	139	/*
	140	* kernel channel
	141	*/
	142	#define LTTNG_KERNEL_CHANNEL_PADDING1 LTTNG_SYMBOL_NAME_LEN + 32
	143	struct lttng_kernel_channel {
	144	uint64_t subbuf_size; /* bytes */
	145	uint64_t num_subbuf; /* power of 2 */
	146	unsigned int switch_timer_interval; /* usec */
	147	unsigned int read_timer_interval; /* usec */
	148	enum lttng_event_output output; /* splice, mmap */
	149
	150	int overwrite; /* 1: overwrite, 0: discard */
	151	char padding[LTTNG_KERNEL_CHANNEL_PADDING1];
	152	} LTTNG_PACKED;
	153
	154	#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
	155	struct lttng_kernel_filter_bytecode {
	156	uint32_t len;
	157	uint32_t reloc_offset;
	158	uint64_t seqnum;
	159	char data[0];
	160	} LTTNG_PACKED;
	161
	162	#endif /* _LTTNG_KERNEL_H */