- fmem = lttng_fmemopen((void *) filter_expression,
- strlen(filter_expression), "r");
- if (!fmem) {
- fprintf(stderr, "Error opening memory as stream\n");
- ret = -LTTNG_ERR_FILTER_NOMEM;
- goto error;
- }
- ctx = filter_parser_ctx_alloc(fmem);
- if (!ctx) {
- fprintf(stderr, "Error allocating parser\n");
- ret = -LTTNG_ERR_FILTER_NOMEM;
- goto filter_alloc_error;
- }
- ret = filter_parser_ctx_append_ast(ctx);
- if (ret) {
- fprintf(stderr, "Parse error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- ret = filter_visitor_set_parent(ctx);
- if (ret) {
- fprintf(stderr, "Set parent error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- if (print_xml) {
- ret = filter_visitor_print_xml(ctx, stdout, 0);
- if (ret) {
- fflush(stdout);
- fprintf(stderr, "XML print error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- }
-
- dbg_printf("Generating IR... ");
- fflush(stdout);
- ret = filter_visitor_ir_generate(ctx);
- if (ret) {
- fprintf(stderr, "Generate IR error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- dbg_printf("done\n");
-
- dbg_printf("Validating IR... ");
- fflush(stdout);
- ret = filter_visitor_ir_check_binary_op_nesting(ctx);
- if (ret) {
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
-
- /* Normalize globbing patterns in the expression. */
- ret = filter_visitor_ir_normalize_glob_patterns(ctx);
- if (ret) {
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
-
- /* Validate strings used as literals in the expression. */
- ret = filter_visitor_ir_validate_string(ctx);
- if (ret) {
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
-
- /* Validate globbing patterns in the expression. */
- ret = filter_visitor_ir_validate_globbing(ctx);
- if (ret) {
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
-
- dbg_printf("done\n");
-
- dbg_printf("Generating bytecode... ");
- fflush(stdout);
- ret = filter_visitor_bytecode_generate(ctx);
- if (ret) {
- fprintf(stderr, "Generate bytecode error\n");
- ret = -LTTNG_ERR_FILTER_INVAL;
- goto parse_error;
- }
- dbg_printf("done\n");
- dbg_printf("Size of bytecode generated: %u bytes.\n",
- bytecode_get_len(&ctx->bytecode->b));
-
- lsm->u.enable.bytecode_len = sizeof(ctx->bytecode->b)
- + bytecode_get_len(&ctx->bytecode->b);
- lsm->u.enable.expression_len = strlen(filter_expression) + 1;
-
- /* No need to keep the memory stream. */
- if (fclose(fmem) != 0) {
- PERROR("fclose");
- }
-
- *ctxp = ctx;
- return 0;
-
-parse_error:
- filter_ir_free(ctx);
- filter_parser_ctx_free(ctx);
-filter_alloc_error:
- if (fclose(fmem) != 0) {
- PERROR("fclose");
- }
-error:
- return ret;
-}
-
-/*
- * Enable event(s) for a channel, possibly with exclusions and a filter.
- * If no event name is specified, all events are enabled.
- * If no channel name is specified, the default name is used.
- * If filter expression is not NULL, the filter is set for the event.
- * If exclusion count is not zero, the exclusions are set for the event.
- * Returns size of returned session payload data or a negative error code.
- */
-int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
- struct lttng_event *ev, const char *channel_name,
- const char *original_filter_expression,
- int exclusion_count, char **exclusion_list)
-{
- struct lttcomm_session_msg lsm;
- char *varlen_data;
- int ret = 0;
- unsigned int free_filter_expression = 0;
- struct filter_parser_ctx *ctx = NULL;
- /*
- * Cast as non-const since we may replace the filter expression
- * by a dynamically allocated string. Otherwise, the original
- * string is not modified.
- */
- char *filter_expression = (char *) original_filter_expression;
-
- if (handle == NULL || ev == NULL) {
- ret = -LTTNG_ERR_INVALID;