+++ /dev/null
-#ifndef _LTTNG_FILTER_H
-#define _LTTNG_FILTER_H
-
-/*
- * lttng-filter.h
- *
- * LTTng UST filter header.
- *
- * Copyright (C) 2010-2012 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 <errno.h>
-#include <stdio.h>
-#include <helper.h>
-#include <lttng/ust-events.h>
-#include <stdint.h>
-#include <assert.h>
-#include <errno.h>
-#include <string.h>
-#include <inttypes.h>
-#include <limits.h>
-#include <usterr-signal-safe.h>
-#include "filter-bytecode.h"
-
-/* Filter stack length, in number of entries */
-#define FILTER_STACK_LEN 8
-
-#ifndef min_t
-#define min_t(type, a, b) \
- ((type) (a) < (type) (b) ? (type) (a) : (type) (b))
-#endif
-
-#ifndef likely
-#define likely(x) __builtin_expect(!!(x), 1)
-#endif
-
-#ifndef unlikely
-#define unlikely(x) __builtin_expect(!!(x), 0)
-#endif
-
-#ifdef DEBUG
-#define dbg_printf(fmt, args...) printf("[debug bytecode] " fmt, ## args)
-#else
-#define dbg_printf(fmt, args...) \
-do { \
- /* do nothing but check printf format */ \
- if (0) \
- printf("[debug bytecode] " fmt, ## args); \
-} while (0)
-#endif
-
-/* Linked bytecode */
-struct bytecode_runtime {
- uint16_t len;
- char data[0];
-};
-
-enum entry_type {
- REG_S64,
- REG_DOUBLE,
- REG_STRING,
- REG_TYPE_UNKNOWN,
-};
-
-/* Validation stack */
-struct vstack_entry {
- enum entry_type type;
-};
-
-struct vstack {
- int top; /* top of stack */
- struct vstack_entry e[FILTER_STACK_LEN];
-};
-
-static inline
-void vstack_init(struct vstack *stack)
-{
- stack->top = -1;
-}
-
-static inline
-struct vstack_entry *vstack_ax(struct vstack *stack)
-{
- if (unlikely(stack->top < 0))
- return NULL;
- return &stack->e[stack->top];
-}
-
-static inline
-struct vstack_entry *vstack_bx(struct vstack *stack)
-{
- if (unlikely(stack->top < 1))
- return NULL;
- return &stack->e[stack->top - 1];
-}
-
-static inline
-int vstack_push(struct vstack *stack)
-{
- if (stack->top >= FILTER_STACK_LEN - 1) {
- ERR("Stack full\n");
- return -EINVAL;
- }
- ++stack->top;
- return 0;
-}
-
-static inline
-int vstack_pop(struct vstack *stack)
-{
- if (unlikely(stack->top < 0)) {
- ERR("Stack empty\n");
- return -EINVAL;
- }
- stack->top--;
- return 0;
-}
-
-/* Execution stack */
-struct estack_entry {
- union {
- int64_t v;
- double d;
-
- struct {
- const char *str;
- size_t seq_len;
- int literal; /* is string literal ? */
- } s;
- } u;
-};
-
-struct estack {
- int top; /* top of stack */
- struct estack_entry e[FILTER_STACK_LEN];
-};
-
-static inline
-void estack_init(struct estack *stack)
-{
- stack->top = -1;
-}
-
-static inline
-struct estack_entry *estack_ax(struct estack *stack)
-{
- assert(stack->top >= 0);
- return &stack->e[stack->top];
-}
-
-static inline
-struct estack_entry *estack_bx(struct estack *stack)
-{
- assert(stack->top >= 1);
- return &stack->e[stack->top - 1];
-}
-
-static inline
-void estack_push(struct estack *stack)
-{
- assert(stack->top < FILTER_STACK_LEN - 1);
- ++stack->top;
-}
-
-static inline
-void estack_pop(struct estack *stack)
-{
- assert(stack->top >= 0);
- stack->top--;
-}
-
-const char *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_false(void *filter_data,
- const char *filter_stack_data);
-int lttng_filter_interpret_bytecode(void *filter_data,
- const char *filter_stack_data);
-
-#endif /* _LTTNG_FILTER_H */