--- /dev/null
+/*
+ * lttng-bytecode.c
+ *
+ * LTTng UST bytecode code.
+ *
+ * Copyright (C) 2010-2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * 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:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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.
+ */
+
+#define _LGPL_SOURCE
+#include <stddef.h>
+#include <stdint.h>
+
+#include <urcu/rculist.h>
+
+#include "lttng-bytecode.h"
+#include "ust-events-internal.h"
+
+static const char *opnames[] = {
+ [ BYTECODE_OP_UNKNOWN ] = "UNKNOWN",
+
+ [ BYTECODE_OP_RETURN ] = "RETURN",
+
+ /* binary */
+ [ BYTECODE_OP_MUL ] = "MUL",
+ [ BYTECODE_OP_DIV ] = "DIV",
+ [ BYTECODE_OP_MOD ] = "MOD",
+ [ BYTECODE_OP_PLUS ] = "PLUS",
+ [ BYTECODE_OP_MINUS ] = "MINUS",
+ [ BYTECODE_OP_BIT_RSHIFT ] = "BIT_RSHIFT",
+ [ BYTECODE_OP_BIT_LSHIFT ] = "BIT_LSHIFT",
+ [ BYTECODE_OP_BIT_AND ] = "BIT_AND",
+ [ BYTECODE_OP_BIT_OR ] = "BIT_OR",
+ [ BYTECODE_OP_BIT_XOR ] = "BIT_XOR",
+
+ /* binary comparators */
+ [ BYTECODE_OP_EQ ] = "EQ",
+ [ BYTECODE_OP_NE ] = "NE",
+ [ BYTECODE_OP_GT ] = "GT",
+ [ BYTECODE_OP_LT ] = "LT",
+ [ BYTECODE_OP_GE ] = "GE",
+ [ BYTECODE_OP_LE ] = "LE",
+
+ /* string binary comparators */
+ [ BYTECODE_OP_EQ_STRING ] = "EQ_STRING",
+ [ BYTECODE_OP_NE_STRING ] = "NE_STRING",
+ [ BYTECODE_OP_GT_STRING ] = "GT_STRING",
+ [ BYTECODE_OP_LT_STRING ] = "LT_STRING",
+ [ BYTECODE_OP_GE_STRING ] = "GE_STRING",
+ [ BYTECODE_OP_LE_STRING ] = "LE_STRING",
+
+ /* s64 binary comparators */
+ [ BYTECODE_OP_EQ_S64 ] = "EQ_S64",
+ [ BYTECODE_OP_NE_S64 ] = "NE_S64",
+ [ BYTECODE_OP_GT_S64 ] = "GT_S64",
+ [ BYTECODE_OP_LT_S64 ] = "LT_S64",
+ [ BYTECODE_OP_GE_S64 ] = "GE_S64",
+ [ BYTECODE_OP_LE_S64 ] = "LE_S64",
+
+ /* double binary comparators */
+ [ BYTECODE_OP_EQ_DOUBLE ] = "EQ_DOUBLE",
+ [ BYTECODE_OP_NE_DOUBLE ] = "NE_DOUBLE",
+ [ BYTECODE_OP_GT_DOUBLE ] = "GT_DOUBLE",
+ [ BYTECODE_OP_LT_DOUBLE ] = "LT_DOUBLE",
+ [ BYTECODE_OP_GE_DOUBLE ] = "GE_DOUBLE",
+ [ BYTECODE_OP_LE_DOUBLE ] = "LE_DOUBLE",
+
+ /* Mixed S64-double binary comparators */
+ [ BYTECODE_OP_EQ_DOUBLE_S64 ] = "EQ_DOUBLE_S64",
+ [ BYTECODE_OP_NE_DOUBLE_S64 ] = "NE_DOUBLE_S64",
+ [ BYTECODE_OP_GT_DOUBLE_S64 ] = "GT_DOUBLE_S64",
+ [ BYTECODE_OP_LT_DOUBLE_S64 ] = "LT_DOUBLE_S64",
+ [ BYTECODE_OP_GE_DOUBLE_S64 ] = "GE_DOUBLE_S64",
+ [ BYTECODE_OP_LE_DOUBLE_S64 ] = "LE_DOUBLE_S64",
+
+ [ BYTECODE_OP_EQ_S64_DOUBLE ] = "EQ_S64_DOUBLE",
+ [ BYTECODE_OP_NE_S64_DOUBLE ] = "NE_S64_DOUBLE",
+ [ BYTECODE_OP_GT_S64_DOUBLE ] = "GT_S64_DOUBLE",
+ [ BYTECODE_OP_LT_S64_DOUBLE ] = "LT_S64_DOUBLE",
+ [ BYTECODE_OP_GE_S64_DOUBLE ] = "GE_S64_DOUBLE",
+ [ BYTECODE_OP_LE_S64_DOUBLE ] = "LE_S64_DOUBLE",
+
+ /* unary */
+ [ BYTECODE_OP_UNARY_PLUS ] = "UNARY_PLUS",
+ [ BYTECODE_OP_UNARY_MINUS ] = "UNARY_MINUS",
+ [ BYTECODE_OP_UNARY_NOT ] = "UNARY_NOT",
+ [ BYTECODE_OP_UNARY_PLUS_S64 ] = "UNARY_PLUS_S64",
+ [ BYTECODE_OP_UNARY_MINUS_S64 ] = "UNARY_MINUS_S64",
+ [ BYTECODE_OP_UNARY_NOT_S64 ] = "UNARY_NOT_S64",
+ [ BYTECODE_OP_UNARY_PLUS_DOUBLE ] = "UNARY_PLUS_DOUBLE",
+ [ BYTECODE_OP_UNARY_MINUS_DOUBLE ] = "UNARY_MINUS_DOUBLE",
+ [ BYTECODE_OP_UNARY_NOT_DOUBLE ] = "UNARY_NOT_DOUBLE",
+
+ /* logical */
+ [ BYTECODE_OP_AND ] = "AND",
+ [ BYTECODE_OP_OR ] = "OR",
+
+ /* load field ref */
+ [ BYTECODE_OP_LOAD_FIELD_REF ] = "LOAD_FIELD_REF",
+ [ BYTECODE_OP_LOAD_FIELD_REF_STRING ] = "LOAD_FIELD_REF_STRING",
+ [ BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE ] = "LOAD_FIELD_REF_SEQUENCE",
+ [ BYTECODE_OP_LOAD_FIELD_REF_S64 ] = "LOAD_FIELD_REF_S64",
+ [ BYTECODE_OP_LOAD_FIELD_REF_DOUBLE ] = "LOAD_FIELD_REF_DOUBLE",
+
+ /* load from immediate operand */
+ [ BYTECODE_OP_LOAD_STRING ] = "LOAD_STRING",
+ [ BYTECODE_OP_LOAD_S64 ] = "LOAD_S64",
+ [ BYTECODE_OP_LOAD_DOUBLE ] = "LOAD_DOUBLE",
+
+ /* cast */
+ [ BYTECODE_OP_CAST_TO_S64 ] = "CAST_TO_S64",
+ [ BYTECODE_OP_CAST_DOUBLE_TO_S64 ] = "CAST_DOUBLE_TO_S64",
+ [ BYTECODE_OP_CAST_NOP ] = "CAST_NOP",
+
+ /* get context ref */
+ [ BYTECODE_OP_GET_CONTEXT_REF ] = "GET_CONTEXT_REF",
+ [ BYTECODE_OP_GET_CONTEXT_REF_STRING ] = "GET_CONTEXT_REF_STRING",
+ [ BYTECODE_OP_GET_CONTEXT_REF_S64 ] = "GET_CONTEXT_REF_S64",
+ [ BYTECODE_OP_GET_CONTEXT_REF_DOUBLE ] = "GET_CONTEXT_REF_DOUBLE",
+
+ /* load userspace field ref */
+ [ BYTECODE_OP_LOAD_FIELD_REF_USER_STRING ] = "LOAD_FIELD_REF_USER_STRING",
+ [ BYTECODE_OP_LOAD_FIELD_REF_USER_SEQUENCE ] = "LOAD_FIELD_REF_USER_SEQUENCE",
+
+ /*
+ * load immediate star globbing pattern (literal string)
+ * from immediate.
+ */
+ [ BYTECODE_OP_LOAD_STAR_GLOB_STRING ] = "LOAD_STAR_GLOB_STRING",
+
+ /* globbing pattern binary operator: apply to */
+ [ BYTECODE_OP_EQ_STAR_GLOB_STRING ] = "EQ_STAR_GLOB_STRING",
+ [ BYTECODE_OP_NE_STAR_GLOB_STRING ] = "NE_STAR_GLOB_STRING",
+
+ /*
+ * Instructions for recursive traversal through composed types.
+ */
+ [ BYTECODE_OP_GET_CONTEXT_ROOT ] = "GET_CONTEXT_ROOT",
+ [ BYTECODE_OP_GET_APP_CONTEXT_ROOT ] = "GET_APP_CONTEXT_ROOT",
+ [ BYTECODE_OP_GET_PAYLOAD_ROOT ] = "GET_PAYLOAD_ROOT",
+
+ [ BYTECODE_OP_GET_SYMBOL ] = "GET_SYMBOL",
+ [ BYTECODE_OP_GET_SYMBOL_FIELD ] = "GET_SYMBOL_FIELD",
+ [ BYTECODE_OP_GET_INDEX_U16 ] = "GET_INDEX_U16",
+ [ BYTECODE_OP_GET_INDEX_U64 ] = "GET_INDEX_U64",
+
+ [ BYTECODE_OP_LOAD_FIELD ] = "LOAD_FIELD",
+ [ BYTECODE_OP_LOAD_FIELD_S8 ] = "LOAD_FIELD_S8",
+ [ BYTECODE_OP_LOAD_FIELD_S16 ] = "LOAD_FIELD_S16",
+ [ BYTECODE_OP_LOAD_FIELD_S32 ] = "LOAD_FIELD_S32",
+ [ BYTECODE_OP_LOAD_FIELD_S64 ] = "LOAD_FIELD_S64",
+ [ BYTECODE_OP_LOAD_FIELD_U8 ] = "LOAD_FIELD_U8",
+ [ BYTECODE_OP_LOAD_FIELD_U16 ] = "LOAD_FIELD_U16",
+ [ BYTECODE_OP_LOAD_FIELD_U32 ] = "LOAD_FIELD_U32",
+ [ BYTECODE_OP_LOAD_FIELD_U64 ] = "LOAD_FIELD_U64",
+ [ BYTECODE_OP_LOAD_FIELD_STRING ] = "LOAD_FIELD_STRING",
+ [ BYTECODE_OP_LOAD_FIELD_SEQUENCE ] = "LOAD_FIELD_SEQUENCE",
+ [ BYTECODE_OP_LOAD_FIELD_DOUBLE ] = "LOAD_FIELD_DOUBLE",
+
+ [ BYTECODE_OP_UNARY_BIT_NOT ] = "UNARY_BIT_NOT",
+
+ [ BYTECODE_OP_RETURN_S64 ] = "RETURN_S64",
+};
+
+const char *print_op(enum bytecode_op op)
+{
+ if (op >= NR_BYTECODE_OPS)
+ return "UNKNOWN";
+ else
+ return opnames[op];
+}
+
+static
+int apply_field_reloc(const struct lttng_event_desc *event_desc,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *field_name,
+ enum bytecode_op bytecode_op)
+{
+ 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 */
+ if (!event_desc)
+ return -EINVAL;
+ fields = event_desc->fields;
+ if (!fields)
+ return -EINVAL;
+ nr_fields = event_desc->nr_fields;
+ for (i = 0; i < nr_fields; i++) {
+ if (fields[i].u.ext.nofilter) {
+ continue;
+ }
+ 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:
+ case atype_enum_nestable:
+ field_offset += sizeof(int64_t);
+ break;
+ case atype_array:
+ case atype_array_nestable:
+ case atype_sequence:
+ case atype_sequence_nestable:
+ 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 (bytecode_op) {
+ case BYTECODE_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:
+ case atype_enum_nestable:
+ op->op = BYTECODE_OP_LOAD_FIELD_REF_S64;
+ break;
+ case atype_array:
+ case atype_array_nestable:
+ case atype_sequence:
+ case atype_sequence_nestable:
+ op->op = BYTECODE_OP_LOAD_FIELD_REF_SEQUENCE;
+ break;
+ case atype_string:
+ op->op = BYTECODE_OP_LOAD_FIELD_REF_STRING;
+ break;
+ case atype_float:
+ op->op = BYTECODE_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 apply_context_reloc(struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *context_name,
+ enum bytecode_op bytecode_op)
+{
+ struct load_op *op;
+ struct lttng_ctx_field *ctx_field;
+ int idx;
+ struct lttng_ctx *ctx = *runtime->p.pctx;
+
+ dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name);
+
+ /* Get context index */
+ idx = lttng_get_context_index(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,
+ &ctx);
+ if (ret)
+ return ret;
+ idx = lttng_get_context_index(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 = &ctx->fields[idx];
+ op = (struct load_op *) &runtime->code[reloc_offset];
+
+ switch (bytecode_op) {
+ case BYTECODE_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:
+ case atype_enum_nestable:
+ op->op = BYTECODE_OP_GET_CONTEXT_REF_S64;
+ break;
+ /* Sequence and array supported as string */
+ case atype_string:
+ case atype_array:
+ case atype_array_nestable:
+ case atype_sequence:
+ case atype_sequence_nestable:
+ op->op = BYTECODE_OP_GET_CONTEXT_REF_STRING;
+ break;
+ case atype_float:
+ op->op = BYTECODE_OP_GET_CONTEXT_REF_DOUBLE;
+ break;
+ case atype_dynamic:
+ op->op = BYTECODE_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(const struct lttng_event_desc *event_desc,
+ 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 BYTECODE_OP_LOAD_FIELD_REF:
+ return apply_field_reloc(event_desc, runtime, runtime_len,
+ reloc_offset, name, op->op);
+ case BYTECODE_OP_GET_CONTEXT_REF:
+ return apply_context_reloc(runtime, runtime_len,
+ reloc_offset, name, op->op);
+ case BYTECODE_OP_GET_SYMBOL:
+ case BYTECODE_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_bytecode_node *bytecode,
+ struct cds_list_head *bytecode_runtime_head)
+{
+ struct lttng_bytecode_runtime *bc_runtime;
+
+ cds_list_for_each_entry(bc_runtime, bytecode_runtime_head, node) {
+ if (bc_runtime->bc == bytecode)
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Take a bytecode with reloc table and link it to an event to create a
+ * bytecode runtime.
+ */
+static
+int link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx **ctx,
+ struct lttng_ust_bytecode_node *bytecode,
+ struct cds_list_head *insert_loc)
+{
+ int ret, offset, next_offset;
+ struct bytecode_runtime *runtime = NULL;
+ size_t runtime_alloc_len;
+
+ if (!bytecode)
+ return 0;
+ /* Bytecode already linked */
+ if (bytecode_is_linked(bytecode, insert_loc))
+ return 0;
+
+ dbg_printf("Linking...\n");
+
+ /* We don't need the reloc table in the runtime */
+ runtime_alloc_len = sizeof(*runtime) + bytecode->bc.reloc_offset;
+ runtime = zmalloc(runtime_alloc_len);
+ if (!runtime) {
+ ret = -ENOMEM;
+ goto alloc_error;
+ }
+ runtime->p.bc = bytecode;
+ runtime->p.pctx = ctx;
+ runtime->len = bytecode->bc.reloc_offset;
+ /* copy original bytecode */
+ memcpy(runtime->code, bytecode->bc.data, runtime->len);
+ /*
+ * apply relocs. Those are a uint16_t (offset in bytecode)
+ * followed by a string (field name).
+ */
+ for (offset = bytecode->bc.reloc_offset;
+ offset < bytecode->bc.len;
+ offset = next_offset) {
+ uint16_t reloc_offset =
+ *(uint16_t *) &bytecode->bc.data[offset];
+ const char *name =
+ (const char *) &bytecode->bc.data[offset + sizeof(uint16_t)];
+
+ ret = apply_reloc(event_desc, runtime, runtime->len, reloc_offset, name);
+ if (ret) {
+ goto link_error;
+ }
+ next_offset = offset + sizeof(uint16_t) + strlen(name) + 1;
+ }
+ /* Validate bytecode */
+ ret = lttng_bytecode_validate(runtime);
+ if (ret) {
+ goto link_error;
+ }
+ /* Specialize bytecode */
+ ret = lttng_bytecode_specialize(event_desc, runtime);
+ if (ret) {
+ goto link_error;
+ }
+
+ switch (bytecode->type) {
+ case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER:
+ runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret;
+ break;
+ case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE:
+ runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret;
+ break;
+ default:
+ abort();
+ }
+
+ runtime->p.link_failed = 0;
+ cds_list_add_rcu(&runtime->p.node, insert_loc);
+ dbg_printf("Linking successful.\n");
+ return 0;
+
+link_error:
+ switch (bytecode->type) {
+ case LTTNG_UST_BYTECODE_NODE_TYPE_FILTER:
+ runtime->p.interpreter_funcs.filter = lttng_bytecode_filter_interpret_false;
+ break;
+ case LTTNG_UST_BYTECODE_NODE_TYPE_CAPTURE:
+ runtime->p.interpreter_funcs.capture = lttng_bytecode_capture_interpret_false;
+ break;
+ default:
+ abort();
+ }
+
+ 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_bytecode_filter_sync_state(struct lttng_bytecode_runtime *runtime)
+{
+ struct lttng_ust_bytecode_node *bc = runtime->bc;
+
+ if (!bc->enabler->enabled || runtime->link_failed)
+ runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret_false;
+ else
+ runtime->interpreter_funcs.filter = lttng_bytecode_filter_interpret;
+}
+
+void lttng_bytecode_capture_sync_state(struct lttng_bytecode_runtime *runtime)
+{
+ struct lttng_ust_bytecode_node *bc = runtime->bc;
+
+ if (!bc->enabler->enabled || runtime->link_failed)
+ runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret_false;
+ else
+ runtime->interpreter_funcs.capture = lttng_bytecode_capture_interpret;
+}
+
+/*
+ * Given the lists of bytecode programs of an instance (trigger or event) and
+ * of a matching enabler, try to link all the enabler's bytecode programs with
+ * the instance.
+ *
+ * This function is called after we confirmed that name enabler and the
+ * instance are name matching (or glob pattern matching).
+ */
+void lttng_enabler_link_bytecode(const struct lttng_event_desc *event_desc,
+ struct lttng_ctx **ctx,
+ struct cds_list_head *instance_bytecode_head,
+ struct cds_list_head *enabler_bytecode_head)
+{
+ struct lttng_ust_bytecode_node *enabler_bc;
+ struct lttng_bytecode_runtime *runtime;
+
+ assert(event_desc);
+
+ /* Go over all the bytecode programs of the enabler. */
+ cds_list_for_each_entry(enabler_bc, enabler_bytecode_head, node) {
+ int found = 0, ret;
+ struct cds_list_head *insert_loc;
+
+ /*
+ * Check if the current enabler bytecode program is already
+ * linked with the instance.
+ */
+ cds_list_for_each_entry(runtime, instance_bytecode_head, node) {
+ if (runtime->bc == enabler_bc) {
+ found = 1;
+ break;
+ }
+ }
+
+ /*
+ * Skip bytecode already linked, go to the next enabler
+ * bytecode program.
+ */
+ if (found)
+ continue;
+
+ /*
+ * Insert at specified priority (seqnum) in increasing
+ * order. If there already is a bytecode of the same priority,
+ * insert the new bytecode right after it.
+ */
+ cds_list_for_each_entry_reverse(runtime,
+ instance_bytecode_head, node) {
+ if (runtime->bc->bc.seqnum <= enabler_bc->bc.seqnum) {
+ /* insert here */
+ insert_loc = &runtime->node;
+ goto add_within;
+ }
+ }
+
+ /* Add to head to list */
+ insert_loc = instance_bytecode_head;
+ add_within:
+ dbg_printf("linking bytecode\n");
+ ret = link_bytecode(event_desc, ctx, enabler_bc, insert_loc);
+ if (ret) {
+ dbg_printf("[lttng filter] warning: cannot link event bytecode\n");
+ }
+ }
+}
+
+/*
+ * We own the bytecode if we return success.
+ */
+int lttng_filter_enabler_attach_bytecode(struct lttng_enabler *enabler,
+ struct lttng_ust_bytecode_node *bytecode)
+{
+ cds_list_add(&bytecode->node, &enabler->filter_bytecode_head);
+ return 0;
+}
+
+static
+void free_filter_runtime(struct cds_list_head *bytecode_runtime_head)
+{
+ struct bytecode_runtime *runtime, *tmp;
+
+ cds_list_for_each_entry_safe(runtime, tmp, bytecode_runtime_head,
+ p.node) {
+ free(runtime->data);
+ free(runtime);
+ }
+}
+
+void lttng_free_event_filter_runtime(struct lttng_event *event)
+{
+ free_filter_runtime(&event->filter_bytecode_runtime_head);
+}
+
+void lttng_free_trigger_filter_runtime(struct lttng_trigger *trigger)
+{
+ free_filter_runtime(&trigger->filter_bytecode_runtime_head);
+}
+
+/* For backward compatibility. Leave those exported symbols in place. */
+void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime)
+{
+}
projects / deliverable / lttng-ust.git / blobdiff