[ FILTER_OP_AND ] = "AND",
[ FILTER_OP_OR ] = "OR",
- /* load */
+ /* 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",
[ 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",
};
const char *print_op(enum filter_op op)
struct load_op *op;
uint32_t field_offset = 0;
- dbg_printf("Apply reloc: %u %s\n", reloc_offset, field_name);
-
- /* Ensure that the reloc is within the code */
- if (runtime_len - reloc_offset < sizeof(uint16_t))
- return -EINVAL;
+ dbg_printf("Apply field reloc: %u %s\n", reloc_offset, field_name);
/* Lookup event by name */
desc = event->desc;
return 0;
}
+static
+int apply_context_reloc(struct lttng_event *event,
+ struct bytecode_runtime *runtime,
+ uint32_t runtime_len,
+ uint32_t reloc_offset,
+ const char *context_name)
+{
+ struct field_ref *field_ref;
+ struct load_op *op;
+ struct lttng_ctx_field *ctx_field;
+ int idx;
+
+ dbg_printf("Apply context reloc: %u %s\n", reloc_offset, context_name);
+
+ /* Get context index */
+ idx = lttng_get_context_index(lttng_static_ctx, context_name);
+ if (idx < 0)
+ 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 = <tng_static_ctx->fields[idx];
+ op = (struct load_op *) &runtime->data[reloc_offset];
+ 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;
+ default:
+ return -EINVAL;
+ }
+ /* set offset to context index within channel contexts */
+ field_ref->offset = (uint16_t) idx;
+ 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->data[reloc_offset];
+ switch (op->op) {
+ case FILTER_OP_LOAD_FIELD_REF:
+ return apply_field_reloc(event, runtime, runtime_len,
+ reloc_offset, name);
+ case FILTER_OP_GET_CONTEXT_REF:
+ return apply_context_reloc(event, runtime, runtime_len,
+ reloc_offset, name);
+ 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)
offset = next_offset) {
uint16_t reloc_offset =
*(uint16_t *) &filter_bytecode->bc.data[offset];
- const char *field_name =
+ const char *name =
(const char *) &filter_bytecode->bc.data[offset + sizeof(uint16_t)];
- ret = apply_field_reloc(event, runtime, runtime->len, reloc_offset, field_name);
+ ret = apply_reloc(event, runtime, runtime->len, reloc_offset, name);
if (ret) {
goto link_error;
}
- next_offset = offset + sizeof(uint16_t) + strlen(field_name) + 1;
+ next_offset = offset + sizeof(uint16_t) + strlen(name) + 1;
}
/* Validate bytecode */
ret = lttng_filter_validate_bytecode(runtime);