Fix: add JUL filter to UST event on logger_name

[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c

diff --git a/src/lib/lttng-ctl/lttng-ctl.c b/src/lib/lttng-ctl/lttng-ctl.c
index 100e587d9e206905b1327bfd790f5b8f1888a8ac..756fd6b590ef80bd89c7f8fabbdf67f765d4e135 100644 (file)
--- a/src/lib/lttng-ctl/lttng-ctl.c
+++ b/src/lib/lttng-ctl/lttng-ctl.c
@@ -708,7 +708,7 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
                int exclusion_count, char **exclusion_list)
 {
        struct lttcomm_session_msg lsm;
-       char *varlen_data;
+       char *varlen_data, *jul_filter = NULL;
        int ret = 0;
        struct filter_parser_ctx *ctx = NULL;
        FILE *fmem = NULL;
@@ -750,7 +750,13 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
        lsm.u.enable.exclusion_count = exclusion_count;
        lsm.u.enable.bytecode_len = 0;
 
-       if (exclusion_count == 0 && filter_expression == NULL) {
+       /*
+        * For the JUL domain, a filter is enforced except for the enable all
+        * event. This is done to avoid having the event in all sessions thus
+        * filtering by logger name.
+        */
+       if (exclusion_count == 0 && filter_expression == NULL &&
+                       (handle->domain.type != LTTNG_DOMAIN_JUL || ev->name[0] == '*')) {
                ret = lttng_ctl_ask_sessiond(&lsm, NULL);
                return ret;
        }
@@ -761,7 +767,23 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
         */
 
        /* Parse filter expression */
-       if (filter_expression != NULL) {
+       if (filter_expression != NULL ||
+                       (handle->domain.type == LTTNG_DOMAIN_JUL && ev->name[0] != '*')) {
+               if (handle->domain.type == LTTNG_DOMAIN_JUL) {
+                       int err;
+
+                       if (filter_expression) {
+                               err = asprintf(&jul_filter, "%s && logger_name == \"%s\"",
+                                               filter_expression, ev->name);
+                       } else {
+                               err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name);
+                       }
+                       if (err < 0) {
+                               PERROR("asprintf");
+                               return -LTTNG_ERR_NOMEM;
+                       }
+                       filter_expression = jul_filter;
+               }
 
                /*
                 * casting const to non-const, as the underlying function will
@@ -771,6 +793,7 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
                                strlen(filter_expression), "r");
                if (!fmem) {
                        fprintf(stderr, "Error opening memory as stream\n");
+                       free(jul_filter);
                        return -LTTNG_ERR_FILTER_NOMEM;
                }
                ctx = filter_parser_ctx_alloc(fmem);
@@ -881,6 +904,7 @@ varlen_alloc_error:
                        perror("fclose");
                }
        }
+       free(jul_filter);
        return ret;
 
 parse_error:
@@ -891,6 +915,7 @@ filter_alloc_error:
        if (fclose(fmem) != 0) {
                perror("fclose");
        }
+       free(jul_filter);
        return ret;
 }