*
* LTTng UST filter code.
*
- * 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>
+#define _LGPL_SOURCE
+#include <urcu/rculist.h>
+#include "lttng-filter.h"
+
+static const char *opnames[] = {
+ [ FILTER_OP_UNKNOWN ] = "UNKNOWN",
+
+ [ FILTER_OP_RETURN ] = "RETURN",
+
+ /* binary */
+ [ FILTER_OP_MUL ] = "MUL",
+ [ FILTER_OP_DIV ] = "DIV",
+ [ FILTER_OP_MOD ] = "MOD",
+ [ FILTER_OP_PLUS ] = "PLUS",
+ [ FILTER_OP_MINUS ] = "MINUS",
+ [ FILTER_OP_RSHIFT ] = "RSHIFT",
+ [ FILTER_OP_LSHIFT ] = "LSHIFT",
+ [ FILTER_OP_BIT_AND ] = "BIT_AND",
+ [ FILTER_OP_BIT_OR ] = "BIT_OR",
+ [ FILTER_OP_BIT_XOR ] = "BIT_XOR",
+
+ /* binary comparators */
+ [ FILTER_OP_EQ ] = "EQ",
+ [ FILTER_OP_NE ] = "NE",
+ [ FILTER_OP_GT ] = "GT",
+ [ FILTER_OP_LT ] = "LT",
+ [ FILTER_OP_GE ] = "GE",
+ [ FILTER_OP_LE ] = "LE",
+
+ /* string binary comparators */
+ [ FILTER_OP_EQ_STRING ] = "EQ_STRING",
+ [ FILTER_OP_NE_STRING ] = "NE_STRING",
+ [ FILTER_OP_GT_STRING ] = "GT_STRING",
+ [ FILTER_OP_LT_STRING ] = "LT_STRING",
+ [ FILTER_OP_GE_STRING ] = "GE_STRING",
+ [ FILTER_OP_LE_STRING ] = "LE_STRING",
+
+ /* s64 binary comparators */
+ [ FILTER_OP_EQ_S64 ] = "EQ_S64",
+ [ FILTER_OP_NE_S64 ] = "NE_S64",
+ [ FILTER_OP_GT_S64 ] = "GT_S64",
+ [ FILTER_OP_LT_S64 ] = "LT_S64",
+ [ FILTER_OP_GE_S64 ] = "GE_S64",
+ [ FILTER_OP_LE_S64 ] = "LE_S64",
+
+ /* double binary comparators */
+ [ FILTER_OP_EQ_DOUBLE ] = "EQ_DOUBLE",
+ [ FILTER_OP_NE_DOUBLE ] = "NE_DOUBLE",
+ [ FILTER_OP_GT_DOUBLE ] = "GT_DOUBLE",
+ [ FILTER_OP_LT_DOUBLE ] = "LT_DOUBLE",
+ [ FILTER_OP_GE_DOUBLE ] = "GE_DOUBLE",
+ [ FILTER_OP_LE_DOUBLE ] = "LE_DOUBLE",
+
+ /* Mixed S64-double binary comparators */
+ [ FILTER_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64",
+ [ FILTER_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64",
+ [ FILTER_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64",
+ [ FILTER_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64",
+ [ FILTER_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64",
+ [ FILTER_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64",
+
+ [ FILTER_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE",
+ [ FILTER_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE",
+ [ FILTER_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE",
+ [ FILTER_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE",
+ [ FILTER_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE",
+ [ FILTER_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE",
+
+ /* unary */
+ [ FILTER_OP_UNARY_PLUS ] = "UNARY_PLUS",
+ [ FILTER_OP_UNARY_MINUS ] = "UNARY_MINUS",
+ [ FILTER_OP_UNARY_NOT ] = "UNARY_NOT",
+ [ FILTER_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64",
+ [ FILTER_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64",
+ [ FILTER_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64",
+ [ FILTER_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE",
+ [ FILTER_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE",
+ [ FILTER_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE",
+
+ /* logical */
+ [ FILTER_OP_AND ] = "AND",
+ [ FILTER_OP_OR ] = "OR",
+
+ /* load field ref */
+ [ FILTER_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF",
+ [ FILTER_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING",
+ [ FILTER_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE",
+ [ FILTER_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64",
+ [ FILTER_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE",
+
+ /* load from immediate operand */
+ [ FILTER_OP_LOAD_STRING ] = "LOAD_STRING",
+ [ FILTER_OP_LOAD_S64 ] = "LOAD_S64",
+ [ FILTER_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE",
+
+ /* cast */
+ [ FILTER_OP_CAST_TO_S64 ] = "CAST_TO_S64",
+ [ FILTER_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64",
+ [ FILTER_OP_CAST_NOP ] = "CAST_NOP",
+
+ /* get context ref */
+ [ FILTER_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF",
+ [ FILTER_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING",
+ [ FILTER_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64",
+ [ FILTER_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE",
+
+ /* load userspace field ref */
+ [ FILTER_OP_LOAD_FIELD_REF_USER_STRING ] = "LOAD_FIELD_REF_USER_STRING",
+ [ FILTER_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = "LOAD_FIELD_REF_USER_SEQUENCE",
+
+ /*
+ * load immediate star globbing pattern (literal string)
+ * from immediate.
+ */
+ [ FILTER_OP_LOAD_STAR_GLOB_STRING ] = "LOAD_STAR_GLOB_STRING",
+
+ /* globbing pattern binary operator: apply to */
+ [ FILTER_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING",
+ [ FILTER_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING",
+
+ /*
+ * Instructions for recursive traversal through composed types.
+ */
+ [ FILTER_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT",
+ [ FILTER_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT",
+ [ FILTER_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT",
+
+ [ FILTER_OP_GET_SYMBOL ] = "GET_SYMBOL",
+ [ FILTER_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD",
+ [ FILTER_OP_GET_INDEX_U16 ] = "GET_INDEX_U16",
+ [ FILTER_OP_GET_INDEX_U64 ] = "GET_INDEX_U64",
+
+ [ FILTER_OP_LOAD_FIELD ] = "LOAD_FIELD",
+ [ FILTER_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8",
+ [ FILTER_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16",
+ [ FILTER_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32",
+ [ FILTER_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64",
+ [ FILTER_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8",
+ [ FILTER_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16",
+ [ FILTER_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32",
+ [ FILTER_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64",
+ [ FILTER_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING",
+ [ FILTER_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE",
+ [ FILTER_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE",
+};
+
+const char *print_op(enum filter_op op)
+{
+ if (op >= NR_FILTER_OPS)
+ return "UNKNOWN";
+ else
+ return opnames[op];
+}
static
-int lttng_filter_interpret_bytecode(void *filter_data,
- const char *filter_stack_data)
+int apply_field_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *field_name,
+ enum filter_op filter_op)
{
- /* TODO */
+ const struct lttng_event_desc *desc;
+ const struct lttng_event_field *fields, *field = NULL;
+ unsigned int nr_fields, i;
+ struct load_op *op;
+ uint32_t field_offset = 0;
+
+ dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name);
+
+ /* Lookup event by name */
+ desc = event->desc;
+ if (!desc)
+ return -EINVAL;
+ fields = desc->fields;
+ if (!fields)
+ return -EINVAL;
+ nr_fields = desc->nr_fields;
+ for (i = 0; i < nr_fields; i++) {
+ if (!strcmp(fields[i].name, field_name)) {
+ field = &fields[i];
+ break;
+ }
+ /* compute field offset */
+ switch (fields[i].type.atype) {
+ case atype_integer:
+ case atype_enum:
+ field_offset += sizeof(int64_t);
+ break;
+ case atype_array:
+ case atype_sequence:
+ field_offset += sizeof(unsigned long);
+ field_offset += sizeof(void *);
+ break;
+ case atype_string:
+ field_offset += sizeof(void *);
+ break;
+ case atype_float:
+ field_offset += sizeof(double);
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+ if (!field)
+ return -EINVAL;
+
+ /* Check if field offset is too large for 16-bit offset */
+ if (field_offset > FILTER_BYTECODE_MAX_LEN - 1)
+ return -EINVAL;
+
+ /* set type */
+ op = (struct load_op *) &runtime->code[reloc_offset];
+
+ switch (filter_op) {
+ case FILTER_OP_LOAD_FIELD_REF:
+ {
+ struct field_ref *field_ref;
+
+ field_ref = (struct field_ref *) op->data;
+ switch (field->type.atype) {
+ case atype_integer:
+ case atype_enum:
+ op->op = FILTER_OP_LOAD_FIELD_REF_S64;
+ break;
+ case atype_array:
+ case atype_sequence:
+ op->op = FILTER_OP_LOAD_FIELD_REF_SEQUENCE;
+ break;
+ case atype_string:
+ op->op = FILTER_OP_LOAD_FIELD_REF_STRING;
+ break;
+ case atype_float:
+ op->op = FILTER_OP_LOAD_FIELD_REF_DOUBLE;
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* set offset */
+ field_ref->offset = (uint16_t) field_offset;
+ break;
+ }
+ default:
+ return -EINVAL;
+ }
return 0;
}
static
-int _lttng_filter_event_link_bytecode(struct ltt_event *event,
- struct lttng_ust_filter_bytecode *filter_bytecode)
+int apply_context_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *context_name,
+ enum filter_op filter_op)
{
- if (!filter_bytecode)
+ struct load_op *op;
+ struct lttng_ctx_field *ctx_field;
+ int idx;
+ struct lttng_session *session = runtime->p.session;
+
+ dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name);
+
+ /* Get context index */
+ idx = lttng_get_context_index(session->ctx, context_name);
+ if (idx < 0) {
+ if (lttng_context_is_app(context_name)) {
+ int ret;
+
+ ret = lttng_ust_add_app_context_to_ctx_rcu(context_name,
+ &session->ctx);
+ if (ret)
+ return ret;
+ idx = lttng_get_context_index(session->ctx,
+ context_name);
+ if (idx < 0)
+ return -ENOENT;
+ } else {
+ return -ENOENT;
+ }
+ }
+ /* Check if idx is too large for 16-bit offset */
+ if (idx > FILTER_BYTECODE_MAX_LEN - 1)
+ return -EINVAL;
+
+ /* Get context return type */
+ ctx_field = &session->ctx->fields[idx];
+ op = (struct load_op *) &runtime->code[reloc_offset];
+
+ switch (filter_op) {
+ case FILTER_OP_GET_CONTEXT_REF:
+ {
+ struct field_ref *field_ref;
+
+ field_ref = (struct field_ref *) op->data;
+ switch (ctx_field->event_field.type.atype) {
+ case atype_integer:
+ case atype_enum:
+ op->op = FILTER_OP_GET_CONTEXT_REF_S64;
+ break;
+ /* Sequence and array supported as string */
+ case atype_string:
+ case atype_array:
+ case atype_sequence:
+ op->op = FILTER_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_float:
+ op->op = FILTER_OP_GET_CONTEXT_REF_DOUBLE;
+ break;
+ case atype_dynamic:
+ op->op = FILTER_OP_GET_CONTEXT_REF;
+ break;
+ default:
+ return -EINVAL;
+ }
+ /* set offset to context index within channel contexts */
+ field_ref->offset = (uint16_t) idx;
+ break;
+ }
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+int apply_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *name)
+{
+ struct load_op *op;
+
+ dbg_printf("Apply reloc: %u %s\n", reloc_offset, name);
+
+ /* Ensure that the reloc is within the code */
+ if (runtime_len - reloc_offset < sizeof(uint16_t))
+ return -EINVAL;
+
+ op = (struct load_op *) &runtime->code[reloc_offset];
+ switch (op->op) {
+ case FILTER_OP_LOAD_FIELD_REF:
+ return apply_field_reloc(event, runtime, runtime_len,
+ reloc_offset, name, op->op);
+ case FILTER_OP_GET_CONTEXT_REF:
+ return apply_context_reloc(event, runtime, runtime_len,
+ reloc_offset, name, op->op);
+ case FILTER_OP_GET_SYMBOL:
+ case FILTER_OP_GET_SYMBOL_FIELD:
+ /*
+ * Will be handled by load specialize phase or
+ * dynamically by interpreter.
+ */
return 0;
+ default:
+ ERR("Unknown reloc op type %u\n", op->op);
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+int bytecode_is_linked(struct lttng_ust_filter_bytecode_node *filter_bytecode,
+ struct lttng_event *event)
+{
+ struct lttng_bytecode_runtime *bc_runtime;
- event->filter = lttng_filter_interpret_bytecode;
- /* TODO */
- /* event->filter_data = ; */
+ cds_list_for_each_entry(bc_runtime,
+ &event->bytecode_runtime_head, node) {
+ if (bc_runtime->bc == filter_bytecode)
+ return 1;
+ }
return 0;
}
-void lttng_filter_event_link_bytecode(struct ltt_event *event,
- struct lttng_ust_filter_bytecode *filter_bytecode)
+/*
+ * Take a bytecode with reloc table and link it to an event to create a
+ * bytecode runtime.
+ */
+static
+int _lttng_filter_event_link_bytecode(struct lttng_event *event,
+ struct lttng_ust_filter_bytecode_node *filter_bytecode,
+ struct cds_list_head *insert_loc)
{
- int ret;
+ int ret, offset, next_offset;
+ struct bytecode_runtime *runtime = NULL;
+ size_t runtime_alloc_len;
+
+ if (!filter_bytecode)
+ return 0;
+ /* Bytecode already linked */
+ if (bytecode_is_linked(filter_bytecode, event))
+ return 0;
+
+ dbg_printf("Linking...\n");
+
+ /* We don't need the reloc table in the runtime */
+ runtime_alloc_len = sizeof(*runtime) + filter_bytecode->bc.reloc_offset;
+ runtime = zmalloc(runtime_alloc_len);
+ if (!runtime) {
+ ret = -ENOMEM;
+ goto alloc_error;
+ }
+ runtime->p.bc = filter_bytecode;
+ runtime->p.session = event->chan->session;
+ runtime->p.event = event;
+ runtime->len = filter_bytecode->bc.reloc_offset;
+ /* copy original bytecode */
+ memcpy(runtime->code, filter_bytecode->bc.data, runtime->len);
+ /*
+ * apply relocs. Those are a uint16_t (offset in bytecode)
+ * followed by a string (field name).
+ */
+ for (offset = filter_bytecode->bc.reloc_offset;
+ offset < filter_bytecode->bc.len;
+ offset = next_offset) {
+ uint16_t reloc_offset =
+ *(uint16_t *) &filter_bytecode->bc.data[offset];
+ const char *name =
+ (const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)];
- ret = _lttng_filter_event_link_bytecode(event, event->filter_bytecode);
+ ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name);
+ if (ret) {
+ goto link_error;
+ }
+ next_offset = offset + sizeof(uint16_t) + strlen(name) + 1;
+ }
+ /* Validate bytecode */
+ ret = lttng_filter_validate_bytecode(runtime);
+ if (ret) {
+ goto link_error;
+ }
+ /* Specialize bytecode */
+ ret = lttng_filter_specialize_bytecode(event, runtime);
if (ret) {
- fprintf(stderr, "[lttng filter] error linking event bytecode\n");
+ goto link_error;
}
+ runtime->p.filter = lttng_filter_interpret_bytecode;
+ runtime->p.link_failed = 0;
+ cds_list_add_rcu(&runtime->p.node, insert_loc);
+ dbg_printf("Linking successful.\n");
+ return 0;
+
+link_error:
+ runtime->p.filter = lttng_filter_false;
+ runtime->p.link_failed = 1;
+ cds_list_add_rcu(&runtime->p.node, insert_loc);
+alloc_error:
+ dbg_printf("Linking failed.\n");
+ return ret;
+}
+
+void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime)
+{
+ struct lttng_ust_filter_bytecode_node *bc = runtime->bc;
+
+ if (!bc->enabler->enabled || runtime->link_failed)
+ runtime->filter = lttng_filter_false;
+ else
+ runtime->filter = lttng_filter_interpret_bytecode;
}
/*
- * Link bytecode to all events for a wildcard. Skips events that already
- * have a bytecode linked.
- * We do not set each event's filter_bytecode field, because they do not
- * own the filter_bytecode: the wildcard owns it.
+ * Link bytecode for all enablers referenced by an event.
*/
-void lttng_filter_wildcard_link_bytecode(struct session_wildcard *wildcard)
+void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+ struct lttng_enabler *enabler)
{
- struct ltt_event *event;
- int ret;
+ struct lttng_ust_filter_bytecode_node *bc;
+ struct lttng_bytecode_runtime *runtime;
- if (!wildcard->filter_bytecode)
- return;
+ /* Can only be called for events with desc attached */
+ assert(event->desc);
- cds_list_for_each_entry(event, &wildcard->events, wildcard_list) {
- if (event->filter)
+ /* Link each bytecode. */
+ cds_list_for_each_entry(bc, &enabler->filter_bytecode_head, node) {
+ int found = 0, ret;
+ struct cds_list_head *insert_loc;
+
+ cds_list_for_each_entry(runtime,
+ &event->bytecode_runtime_head, node) {
+ if (runtime->bc == bc) {
+ found = 1;
+ break;
+ }
+ }
+ /* Skip bytecode already linked */
+ if (found)
continue;
- ret = _lttng_filter_event_link_bytecode(event,
- wildcard->filter_bytecode);
+
+ /*
+ * Insert at specified priority (seqnum) in increasing
+ * order.
+ */
+ cds_list_for_each_entry_reverse(runtime,
+ &event->bytecode_runtime_head, node) {
+ if (runtime->bc->bc.seqnum < bc->bc.seqnum) {
+ /* insert here */
+ insert_loc = &runtime->node;
+ goto add_within;
+ }
+ }
+ /* Add to head to list */
+ insert_loc = &event->bytecode_runtime_head;
+ add_within:
+ dbg_printf("linking bytecode\n");
+ ret = _lttng_filter_event_link_bytecode(event, bc,
+ insert_loc);
if (ret) {
- fprintf(stderr, "[lttng filter] error linking wildcard bytecode\n");
+ dbg_printf("[lttng filter] warning: cannot link event bytecode\n");
}
-
}
- return;
}
/*
- * Need to attach filter to an event before starting tracing for the
- * session.
+ * We own the filter_bytecode if we return success.
*/
-int lttng_filter_event_attach_bytecode(struct ltt_event *event,
- struct lttng_ust_filter_bytecode *filter_bytecode)
+int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler,
+ struct lttng_ust_filter_bytecode_node *filter_bytecode)
{
- struct lttng_ust_filter_bytecode *bc;
-
- if (event->chan->session->been_active)
- return -EPERM;
- if (event->filter_bytecode)
- return -EEXIST;
-
- bc = zmalloc(sizeof(struct lttng_ust_filter_bytecode)
- + filter_bytecode->len);
- if (!bc)
- return -ENOMEM;
- event->filter_bytecode = bc;
+ cds_list_add(&filter_bytecode->node, &enabler->filter_bytecode_head);
return 0;
}
-/*
- * Need to attach filter to a wildcard before starting tracing for the
- * session.
- */
-int lttng_filter_wildcard_attach_bytecode(struct session_wildcard *wildcard,
- struct lttng_ust_filter_bytecode *filter_bytecode)
+void lttng_free_enabler_filter_bytecode(struct lttng_enabler *enabler)
{
- struct lttng_ust_filter_bytecode *bc;
-
- if (wildcard->chan->session->been_active)
- return -EPERM;
- if (wildcard->filter_bytecode)
- return -EEXIST;
-
- bc = zmalloc(sizeof(struct lttng_ust_filter_bytecode)
- + filter_bytecode->len);
- if (!bc)
- return -ENOMEM;
- wildcard->filter_bytecode = bc;
- return 0;
+ struct lttng_ust_filter_bytecode_node *filter_bytecode, *tmp;
+
+ cds_list_for_each_entry_safe(filter_bytecode, tmp,
+ &enabler->filter_bytecode_head, node) {
+ free(filter_bytecode);
+ }
+}
+
+void lttng_free_event_filter_runtime(struct lttng_event *event)
+{
+ struct bytecode_runtime *runtime, *tmp;
+
+ cds_list_for_each_entry_safe(runtime, tmp,
+ &event->bytecode_runtime_head, p.node) {
+ free(runtime->data);
+ free(runtime);
+ }
}
projects / lttng-ust.git / blobdiff