X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=probes%2Flttng-kprobes.c;h=c0a15e47a0c0b4db1cef98c27cf960dead54790f;hb=HEAD;hp=4398dc6d8f811f68c06abb4fcc587f3dcd446583;hpb=886d51a3d7ed5fa6b41d7f19b3e14ae6c535a44c;p=lttng-modules.git

diff --git a/probes/lttng-kprobes.c b/probes/lttng-kprobes.c
deleted file mode 100644
index 4398dc6d..00000000
--- a/probes/lttng-kprobes.c
+++ /dev/null
@@ -1,177 +0,0 @@
-/*
- * probes/lttng-kprobes.c
- *
- * LTTng kprobes integration module.
- *
- * 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 <linux/module.h>
-#include <linux/kprobes.h>
-#include <linux/slab.h>
-#include "../lttng-events.h"
-#include "../wrapper/ringbuffer/frontend_types.h"
-#include "../wrapper/vmalloc.h"
-#include "../lttng-tracer.h"
-
-static
-int lttng_kprobes_handler_pre(struct kprobe *p, struct pt_regs *regs)
-{
-	struct lttng_event *event =
-		container_of(p, struct lttng_event, u.kprobe.kp);
-	struct lttng_channel *chan = event->chan;
-	struct lib_ring_buffer_ctx ctx;
-	int ret;
-	unsigned long data = (unsigned long) p->addr;
-
-	if (unlikely(!ACCESS_ONCE(chan->session->active)))
-		return 0;
-	if (unlikely(!ACCESS_ONCE(chan->enabled)))
-		return 0;
-	if (unlikely(!ACCESS_ONCE(event->enabled)))
-		return 0;
-
-	lib_ring_buffer_ctx_init(&ctx, chan->chan, event, sizeof(data),
-				 lttng_alignof(data), -1);
-	ret = chan->ops->event_reserve(&ctx, event->id);
-	if (ret < 0)
-		return 0;
-	lib_ring_buffer_align_ctx(&ctx, lttng_alignof(data));
-	chan->ops->event_write(&ctx, &data, sizeof(data));
-	chan->ops->event_commit(&ctx);
-	return 0;
-}
-
-/*
- * Create event description
- */
-static
-int lttng_create_kprobe_event(const char *name, struct lttng_event *event)
-{
-	struct lttng_event_field *field;
-	struct lttng_event_desc *desc;
-	int ret;
-
-	desc = kzalloc(sizeof(*event->desc), GFP_KERNEL);
-	if (!desc)
-		return -ENOMEM;
-	desc->name = kstrdup(name, GFP_KERNEL);
-	if (!desc->name) {
-		ret = -ENOMEM;
-		goto error_str;
-	}
-	desc->nr_fields = 1;
-	desc->fields = field =
-		kzalloc(1 * sizeof(struct lttng_event_field), GFP_KERNEL);
-	if (!field) {
-		ret = -ENOMEM;
-		goto error_field;
-	}
-	field->name = "ip";
-	field->type.atype = atype_integer;
-	field->type.u.basic.integer.size = sizeof(unsigned long) * CHAR_BIT;
-	field->type.u.basic.integer.alignment = lttng_alignof(unsigned long) * CHAR_BIT;
-	field->type.u.basic.integer.signedness = is_signed_type(unsigned long);
-	field->type.u.basic.integer.reverse_byte_order = 0;
-	field->type.u.basic.integer.base = 16;
-	field->type.u.basic.integer.encoding = lttng_encode_none;
-	desc->owner = THIS_MODULE;
-	event->desc = desc;
-
-	return 0;
-
-error_field:
-	kfree(desc->name);
-error_str:
-	kfree(desc);
-	return ret;
-}
-
-int lttng_kprobes_register(const char *name,
-			   const char *symbol_name,
-			   uint64_t offset,
-			   uint64_t addr,
-			   struct lttng_event *event)
-{
-	int ret;
-
-	/* Kprobes expects a NULL symbol name if unused */
-	if (symbol_name[0] == '\0')
-		symbol_name = NULL;
-
-	ret = lttng_create_kprobe_event(name, event);
-	if (ret)
-		goto error;
-	memset(&event->u.kprobe.kp, 0, sizeof(event->u.kprobe.kp));
-	event->u.kprobe.kp.pre_handler = lttng_kprobes_handler_pre;
-	if (symbol_name) {
-		event->u.kprobe.symbol_name =
-			kzalloc(LTTNG_KERNEL_SYM_NAME_LEN * sizeof(char),
-				GFP_KERNEL);
-		if (!event->u.kprobe.symbol_name) {
-			ret = -ENOMEM;
-			goto name_error;
-		}
-		memcpy(event->u.kprobe.symbol_name, symbol_name,
-		       LTTNG_KERNEL_SYM_NAME_LEN * sizeof(char));
-		event->u.kprobe.kp.symbol_name =
-			event->u.kprobe.symbol_name;
-	}
-	event->u.kprobe.kp.offset = offset;
-	event->u.kprobe.kp.addr = (void *) (unsigned long) addr;
-
-	/*
-	 * Ensure the memory we just allocated don't trigger page faults.
-	 * Well.. kprobes itself puts the page fault handler on the blacklist,
-	 * but we can never be too careful.
-	 */
-	wrapper_vmalloc_sync_all();
-
-	ret = register_kprobe(&event->u.kprobe.kp);
-	if (ret)
-		goto register_error;
-	return 0;
-
-register_error:
-	kfree(event->u.kprobe.symbol_name);
-name_error:
-	kfree(event->desc->fields);
-	kfree(event->desc->name);
-	kfree(event->desc);
-error:
-	return ret;
-}
-EXPORT_SYMBOL_GPL(lttng_kprobes_register);
-
-void lttng_kprobes_unregister(struct lttng_event *event)
-{
-	unregister_kprobe(&event->u.kprobe.kp);
-}
-EXPORT_SYMBOL_GPL(lttng_kprobes_unregister);
-
-void lttng_kprobes_destroy_private(struct lttng_event *event)
-{
-	kfree(event->u.kprobe.symbol_name);
-	kfree(event->desc->fields);
-	kfree(event->desc->name);
-	kfree(event->desc);
-}
-EXPORT_SYMBOL_GPL(lttng_kprobes_destroy_private);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit Kprobes Support");