Fix: JUL filtering for event *
[lttng-tools.git] / src / lib / lttng-ctl / lttng-ctl.c
index 9a2160533ee909a5b5efb3c924d96b56484a99b0..2d0753696efbdad55630487fb29a3882370ce4ba 100644 (file)
@@ -520,6 +520,7 @@ int lttng_register_consumer(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_REGISTER_CONSUMER;
        lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
@@ -542,6 +543,7 @@ int lttng_start_tracing(const char *session_name)
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_START_TRACE;
 
        lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -562,6 +564,7 @@ static int _lttng_stop_tracing(const char *session_name, int wait)
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_STOP_TRACE;
 
        lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -691,6 +694,62 @@ int lttng_enable_event_with_filter(struct lttng_handle *handle,
                        filter_expression, 0, NULL);
 }
 
+/*
+ * Depending on the event, return a newly allocated JUL filter expression or
+ * NULL if not applicable.
+ *
+ * An event with NO loglevel and the name is * will return NULL.
+ */
+static char *set_jul_filter(const char *filter, struct lttng_event *ev)
+{
+       int err;
+       char *jul_filter = NULL;
+
+       assert(ev);
+
+       /* Don't add filter for the '*' event. */
+       if (ev->name[0] != '*') {
+               if (filter) {
+                       err = asprintf(&jul_filter, "%s && logger_name == \"%s\"", filter,
+                                       ev->name);
+               } else {
+                       err = asprintf(&jul_filter, "logger_name == \"%s\"", ev->name);
+               }
+               if (err < 0) {
+                       PERROR("asprintf");
+                       goto end;
+               }
+       }
+
+       /* Add loglevel filtering if any for the JUL domain. */
+       if (ev->loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) {
+               char *op;
+
+               if (ev->loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) {
+                       op = ">=";
+               } else {
+                       op = "==";
+               }
+
+               if (filter) {
+                       err = asprintf(&jul_filter, "%s && int_loglevel %s %d", filter, op,
+                                       ev->loglevel);
+               } else {
+                       err = asprintf(&jul_filter, "int_loglevel %s %d", op,
+                                       ev->loglevel);
+               }
+               if (err < 0) {
+                       PERROR("asprintf");
+                       free(jul_filter);
+                       jul_filter = NULL;
+                       goto end;
+               }
+       }
+
+end:
+       return jul_filter;
+}
+
 /*
  * Enable event(s) for a channel, possibly with exclusions and a filter.
  * If no event name is specified, all events are enabled.
@@ -733,23 +792,13 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
                                sizeof(lsm.u.enable.channel_name));
        }
 
-       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
-
-       /* figure out correct command type, based on if we have a filter or exclusions */
-       if (exclusion_count == 0) {
-               if (filter_expression == NULL) {
-                       if (ev->name[0] != '\0') {
-                               lsm.cmd_type = LTTNG_ENABLE_EVENT;
-                       } else {
-                               lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
-                       }
-               } else {
-                       lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_FILTER;
-               }
+       if (ev->name[0] != '\0') {
+               lsm.cmd_type = LTTNG_ENABLE_EVENT;
        } else {
-               lsm.cmd_type = LTTNG_ENABLE_EVENT_WITH_EXCLUSION;
+               lsm.cmd_type = LTTNG_ENABLE_ALL_EVENT;
        }
 
+       lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
        memcpy(&lsm.u.enable.event, ev, sizeof(lsm.u.enable.event));
 
        lttng_ctl_copy_string(lsm.session.name, handle->session_name,
@@ -757,9 +806,14 @@ 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) {
-               ret = lttng_ctl_ask_sessiond(&lsm, NULL);
-               return ret;
+       /*
+        * 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) {
+               goto ask_sessiond;
        }
 
        /*
@@ -768,7 +822,29 @@ 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) {
+               if (handle->domain.type == LTTNG_DOMAIN_JUL) {
+                       char *jul_filter;
+
+                       /* Setup JUL filter if needed. */
+                       jul_filter = set_jul_filter(filter_expression, ev);
+                       if (!jul_filter) {
+                               if (!filter_expression) {
+                                       /* No JUL and no filter, just skip everything below. */
+                                       goto ask_sessiond;
+                               }
+                       } else {
+                               /*
+                                * With a JUL filter, the original filter has been added to it
+                                * thus replace the filter expression.
+                                */
+                               filter_expression = strdup(jul_filter);
+                               free(jul_filter);
+                               if (!filter_expression) {
+                                       return -LTTNG_ERR_FILTER_NOMEM;
+                               }
+                       }
+               }
 
                /*
                 * casting const to non-const, as the underlying function will
@@ -869,9 +945,8 @@ int lttng_enable_event_with_exclusions(struct lttng_handle *handle,
        }
 
        ret = lttng_ctl_ask_sessiond_varlen(&lsm, varlen_data,
-                       LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count
-                                       + lsm.u.enable.bytecode_len,
-                       NULL);
+                       (LTTNG_SYMBOL_NAME_LEN * lsm.u.enable.exclusion_count) +
+                       lsm.u.enable.bytecode_len, NULL);
 
        if (lsm.u.enable.exclusion_count != 0) {
                free(varlen_data);
@@ -897,6 +972,10 @@ filter_alloc_error:
                perror("fclose");
        }
        return ret;
+
+ask_sessiond:
+       ret = lttng_ctl_ask_sessiond(&lsm, NULL);
+       return ret;
 }
 
 /*
@@ -1015,6 +1094,7 @@ int lttng_list_tracepoints(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_TRACEPOINTS;
        lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -1042,6 +1122,7 @@ int lttng_list_tracepoint_fields(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_TRACEPOINT_FIELDS;
        lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -1110,6 +1191,7 @@ int lttng_destroy_session(const char *session_name)
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_DESTROY_SESSION;
 
        lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1129,6 +1211,7 @@ int lttng_list_sessions(struct lttng_session **sessions)
        int ret;
        struct lttcomm_session_msg lsm;
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_SESSIONS;
        ret = lttng_ctl_ask_sessiond(&lsm, (void**) sessions);
        if (ret < 0) {
@@ -1154,6 +1237,7 @@ int lttng_list_domains(const char *session_name,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_DOMAINS;
 
        lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1183,6 +1267,7 @@ int lttng_list_channels(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_CHANNELS;
        lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
@@ -1214,6 +1299,7 @@ int lttng_list_events(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_LIST_EVENTS;
        lttng_ctl_copy_string(lsm.session.name, handle->session_name,
                        sizeof(lsm.session.name));
@@ -1261,6 +1347,7 @@ int lttng_calibrate(struct lttng_handle *handle,
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_CALIBRATE;
        lttng_ctl_copy_lttng_domain(&lsm.domain, &handle->domain);
 
@@ -1491,6 +1578,7 @@ int lttng_data_pending(const char *session_name)
                return -LTTNG_ERR_INVALID;
        }
 
+       memset(&lsm, 0, sizeof(lsm));
        lsm.cmd_type = LTTNG_DATA_PENDING;
 
        lttng_ctl_copy_string(lsm.session.name, session_name,
@@ -1568,16 +1656,20 @@ int lttng_create_session_live(const char *name, const char *url,
        lsm.cmd_type = LTTNG_CREATE_SESSION_LIVE;
        lttng_ctl_copy_string(lsm.session.name, name, sizeof(lsm.session.name));
 
-       size = uri_parse_str_urls(url, NULL, &uris);
-       if (size < 0) {
-               ret = -LTTNG_ERR_INVALID;
-               goto end;
-       }
+       if (url) {
+               size = uri_parse_str_urls(url, NULL, &uris);
+               if (size <= 0) {
+                       ret = -LTTNG_ERR_INVALID;
+                       goto end;
+               }
 
-       /* file:// is not accepted for live session. */
-       if (uris[0].dtype == LTTNG_DST_PATH) {
-               ret = -LTTNG_ERR_INVALID;
-               goto end;
+               /* file:// is not accepted for live session. */
+               if (uris[0].dtype == LTTNG_DST_PATH) {
+                       ret = -LTTNG_ERR_INVALID;
+                       goto end;
+               }
+       } else {
+               size = 0;
        }
 
        lsm.u.session_live.nb_uri = size;
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