*
* LTTng UST filter header.
*
- * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2010-2016 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.
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
*
- * 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.
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
*
- * 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
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
*/
#include <errno.h>
#include <stdio.h>
#include <helper.h>
#include <lttng/ust-events.h>
+#include <lttng/ust-context-provider.h>
#include <stdint.h>
#include <assert.h>
#include <errno.h>
REG_S64,
REG_DOUBLE,
REG_STRING,
- REG_TYPE_UNKNOWN,
+ REG_UNKNOWN,
};
/* Validation stack */
/* Execution stack */
struct estack_entry {
+ enum entry_type type; /* For dynamic typing. */
union {
int64_t v;
double d;
struct estack_entry e[FILTER_STACK_LEN];
};
+/*
+ * Always use aliased type for ax/bx (top of stack).
+ * When ax/bx are S64, use aliased value.
+ */
#define estack_ax_v ax
#define estack_bx_v bx
+#define estack_ax_t ax_t
+#define estack_bx_t bx_t
+/*
+ * ax and bx registers can hold either integer, double or string.
+ */
#define estack_ax(stack, top) \
({ \
assert((top) > FILTER_STACK_EMPTY); \
&(stack)->e[(top) - 1]; \
})
-#define estack_push(stack, top, ax, bx) \
+/*
+ * Currently, only integers (REG_S64) can be pushed into the stack.
+ */
+#define estack_push(stack, top, ax, bx, ax_t, bx_t) \
do { \
assert((top) < FILTER_STACK_LEN - 1); \
(stack)->e[(top) - 1].u.v = (bx); \
+ (stack)->e[(top) - 1].type = (bx_t); \
(bx) = (ax); \
+ (bx_t) = (ax_t); \
++(top); \
} while (0)
-#define estack_pop(stack, top, ax, bx) \
+#define estack_pop(stack, top, ax, bx, ax_t, bx_t) \
do { \
assert((top) > FILTER_STACK_EMPTY); \
(ax) = (bx); \
+ (ax_t) = (bx_t); \
(bx) = (stack)->e[(top) - 2].u.v; \
+ (bx_t) = (stack)->e[(top) - 2].type; \
(top)--; \
} while (0)
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,
+uint64_t lttng_filter_false(void *filter_data,
const char *filter_stack_data);
-int lttng_filter_interpret_bytecode(void *filter_data,
+uint64_t lttng_filter_interpret_bytecode(void *filter_data,
const char *filter_stack_data);
#endif /* _LTTNG_FILTER_H */