/*

 * lttng-context-ip.c

 *

 * LTTng UST Instruction Pointer Context.

 *

 * Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>

 *

 * This library is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; only

 * version 2.1 of the License.

 *

 * This library 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this library; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#include <sys/types.h>

#include <unistd.h>

#include <lttng/ust-events.h>

#include <lttng/ust-tracer.h>

#include <lttng/ringbuffer-config.h>

static

size_t ip_get_size(struct lttng_ctx_field *field, size_t offset)

{

	size_t size = 0;

	size += lib_ring_buffer_align(offset, lttng_alignof(void *));

	size += sizeof(void *);

	return size;

}

static

void ip_record(struct lttng_ctx_field *field,

		 struct lttng_ust_lib_ring_buffer_ctx *ctx,

		 struct lttng_channel *chan)

{

	void *ip;

	ip = ctx->ip;

	lib_ring_buffer_align_ctx(ctx, lttng_alignof(ip));

	chan->ops->event_write(ctx, &ip, sizeof(ip));

}

int lttng_add_ip_to_ctx(struct lttng_ctx **ctx)

{

	struct lttng_ctx_field *field;

	field = lttng_append_context(ctx);

	if (!field)

		return -ENOMEM;

	if (lttng_find_context(*ctx, "ip")) {

		lttng_remove_context_field(ctx, field);

		return -EEXIST;

	}

	field->event_field.name = "ip";

	field->event_field.type.atype = atype_integer;

	field->event_field.type.u.basic.integer.size = sizeof(void *) * CHAR_BIT;

	field->event_field.type.u.basic.integer.alignment = lttng_alignof(void *) * CHAR_BIT;

	field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(void *);

	field->event_field.type.u.basic.integer.reverse_byte_order = 0;

	field->event_field.type.u.basic.integer.base = 16;

	field->event_field.type.u.basic.integer.encoding = lttng_encode_none;

	field->get_size = ip_get_size;

	field->record = ip_record;

	lttng_context_update(*ctx);

	return 0;

}