-#ifndef _LTTNG_FILTER_H
-#define _LTTNG_FILTER_H
-
-/*
+/* SPDX-License-Identifier: MIT
+ *
* lttng-filter.h
*
* LTTng modules filter header.
*
- * Copyright (C) 2010-2014 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
+ * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*/
+#ifndef _LTTNG_FILTER_H
+#define _LTTNG_FILTER_H
+
#include <linux/kernel.h>
#include <lttng-events.h>
#define FILTER_STACK_LEN 10 /* includes 2 dummy */
#define FILTER_STACK_EMPTY 1
+#define FILTER_MAX_DATA_LEN 65536
+
#ifdef DEBUG
#define dbg_printk(fmt, args...) \
printk(KERN_DEBUG "[debug bytecode in %s:%s@%u] " fmt, \
/* Linked bytecode. Child of struct lttng_bytecode_runtime. */
struct bytecode_runtime {
struct lttng_bytecode_runtime p;
+ size_t data_len;
+ size_t data_alloc_len;
+ char *data;
uint16_t len;
- char data[0];
+ char code[0];
};
enum entry_type {
REG_S64,
REG_DOUBLE,
REG_STRING,
+ REG_STAR_GLOB_STRING,
REG_TYPE_UNKNOWN,
+ REG_PTR,
+};
+
+enum load_type {
+ LOAD_ROOT_CONTEXT,
+ LOAD_ROOT_APP_CONTEXT,
+ LOAD_ROOT_PAYLOAD,
+ LOAD_OBJECT,
+};
+
+enum object_type {
+ OBJECT_TYPE_S8,
+ OBJECT_TYPE_S16,
+ OBJECT_TYPE_S32,
+ OBJECT_TYPE_S64,
+ OBJECT_TYPE_U8,
+ OBJECT_TYPE_U16,
+ OBJECT_TYPE_U32,
+ OBJECT_TYPE_U64,
+
+ OBJECT_TYPE_DOUBLE,
+ OBJECT_TYPE_STRING,
+ OBJECT_TYPE_STRING_SEQUENCE,
+
+ OBJECT_TYPE_SEQUENCE,
+ OBJECT_TYPE_ARRAY,
+ OBJECT_TYPE_STRUCT,
+ OBJECT_TYPE_VARIANT,
+
+ OBJECT_TYPE_DYNAMIC,
+};
+
+struct filter_get_index_data {
+ uint64_t offset; /* in bytes */
+ size_t ctx_index;
+ size_t array_len;
+ struct {
+ size_t len;
+ enum object_type type;
+ bool rev_bo; /* reverse byte order */
+ } elem;
};
/* Validation stack */
+struct vstack_load {
+ enum load_type type;
+ enum object_type object_type;
+ const struct lttng_event_field *field;
+ bool rev_bo; /* reverse byte order */
+};
+
struct vstack_entry {
enum entry_type type;
+ struct vstack_load load;
};
struct vstack {
}
/* Execution stack */
+enum estack_string_literal_type {
+ ESTACK_STRING_LITERAL_TYPE_NONE,
+ ESTACK_STRING_LITERAL_TYPE_PLAIN,
+ ESTACK_STRING_LITERAL_TYPE_STAR_GLOB,
+};
+
+struct load_ptr {
+ enum load_type type;
+ enum object_type object_type;
+ const void *ptr;
+ bool rev_bo;
+ /* Temporary place-holders for contexts. */
+ union {
+ int64_t s64;
+ uint64_t u64;
+ double d;
+ } u;
+ /*
+ * "field" is only needed when nested under a variant, in which
+ * case we cannot specialize the nested operations.
+ */
+ const struct lttng_event_field *field;
+};
+
struct estack_entry {
union {
int64_t v;
const char *str;
const char __user *user_str;
size_t seq_len;
- int literal; /* is string literal ? */
+ enum estack_string_literal_type literal_type;
int user; /* is string from userspace ? */
} s;
+ struct load_ptr ptr;
} u;
};
#define estack_ax(stack, top) \
({ \
- WARN_ON_ONCE((top) <= FILTER_STACK_EMPTY); \
+ BUG_ON((top) <= FILTER_STACK_EMPTY); \
&(stack)->e[top]; \
})
#define estack_bx(stack, top) \
({ \
- WARN_ON_ONCE((top) <= FILTER_STACK_EMPTY + 1); \
+ BUG_ON((top) <= FILTER_STACK_EMPTY + 1); \
&(stack)->e[(top) - 1]; \
})
#define estack_push(stack, top, ax, bx) \
do { \
- WARN_ON_ONCE((top) >= FILTER_STACK_LEN - 1); \
+ BUG_ON((top) >= FILTER_STACK_LEN - 1); \
(stack)->e[(top) - 1].u.v = (bx); \
(bx) = (ax); \
++(top); \
#define estack_pop(stack, top, ax, bx) \
do { \
- WARN_ON_ONCE((top) <= FILTER_STACK_EMPTY); \
+ BUG_ON((top) <= FILTER_STACK_EMPTY); \
(ax) = (bx); \
(bx) = (stack)->e[(top) - 2].u.v; \
(top)--; \
const char *lttng_filter_print_op(enum filter_op op);
int lttng_filter_validate_bytecode(struct bytecode_runtime *bytecode);
-int lttng_filter_specialize_bytecode(struct bytecode_runtime *bytecode);
+int lttng_filter_specialize_bytecode(struct lttng_event *event,
+ struct bytecode_runtime *bytecode);
uint64_t lttng_filter_false(void *filter_data,
struct lttng_probe_ctx *lttng_probe_ctx,
projects / lttng-modules.git / blobdiff