return name ? : "<default>";
}
+/*
+ * Return allocated string for pretty-printing exclusion names.
+ */
+static
+char *print_exclusions(int count, char **names)
+{
+ int length = 0;
+ int i;
+ const char *preamble = " excluding ";
+ char *ret;
+
+ if (count == 0) {
+ return strdup("");
+ }
+
+ /* calculate total required length */
+ for (i = 0; i < count; i++) {
+ length += strlen(names[i]) + 1;
+ }
+
+ /* add length of preamble + one for NUL - one for last (missing) comma */
+ length += strlen(preamble);
+ ret = malloc(length);
+ strncpy(ret, preamble, length);
+ for (i = 0; i < count; i++) {
+ strcat(ret, names[i]);
+ if (i != count - 1) {
+ strcat(ret, ",");
+ }
+ }
+ return ret;
+}
+
+/*
+ * Compare list of exclusions against an event name.
+ * Return a list of legal exclusion names.
+ * Produce an error or a warning about others (depending on the situation)
+ */
+static
+int check_exclusion_subsets(const char *event_name,
+ const char *exclusions,
+ int *exclusion_count_ptr,
+ char ***exclusion_list_ptr)
+{
+ const char *excluder_ptr;
+ const char *event_ptr;
+ const char *next_excluder;
+ int excluder_length;
+ int exclusion_count = 0;
+ char **exclusion_list = NULL;
+ int ret = CMD_SUCCESS;
+
+ if (event_name[strlen(event_name) - 1] != '*') {
+ ERR("Event %s: Excluders can only be used with wildcarded events", event_name);
+ goto error;
+ }
+
+ next_excluder = exclusions;
+ while (*next_excluder != 0) {
+ event_ptr = event_name;
+ excluder_ptr = next_excluder;
+ excluder_length = strcspn(next_excluder, ",");
+
+ /* Scan both the excluder and the event letter by letter */
+ while (1) {
+ char e, x;
+
+ e = *event_ptr;
+ x = *excluder_ptr;
+
+ if (x == '*') {
+ /* Event is a subset of the excluder */
+ ERR("Event %s: %.*s excludes all events from %s",
+ event_name,
+ excluder_length,
+ next_excluder,
+ event_name);
+ goto error;
+ }
+ if (e == '*') {
+ /* Excluder is a proper subset of event */
+ exclusion_count++;
+ exclusion_list = realloc(exclusion_list, sizeof(char **) * exclusion_count);
+ exclusion_list[exclusion_count - 1] = strndup(next_excluder, excluder_length);
+
+ break;
+ }
+ if (x != e) {
+ /* Excluder and event sets have no common elements */
+ WARN("Event %s: %.*s does not exclude any events from %s",
+ event_name,
+ excluder_length,
+ next_excluder,
+ event_name);
+ break;
+ }
+ excluder_ptr++;
+ event_ptr++;
+ }
+ /* next excluder */
+ next_excluder += excluder_length;
+ if (*next_excluder == ',') {
+ next_excluder++;
+ }
+ }
+ goto end;
+error:
+ while (exclusion_count--) {
+ free(exclusion_list[exclusion_count]);
+ }
+ if (exclusion_list != NULL) {
+ free(exclusion_list);
+ }
+ exclusion_list = NULL;
+ exclusion_count = 0;
+ ret = CMD_ERROR;
+end:
+ *exclusion_count_ptr = exclusion_count;
+ *exclusion_list_ptr = exclusion_list;
+ return ret;
+}
/*
* Enabling event using the lttng API.
*/
char *event_name, *channel_name = NULL;
struct lttng_event ev;
struct lttng_domain dom;
+ int exclusion_count = 0;
+ char **exclusion_list = NULL;
memset(&ev, 0, sizeof(ev));
memset(&dom, 0, sizeof(dom));
goto error;
}
+ if (opt_kernel && opt_exclude) {
+ ERR("Event name exclusions are not yet implemented for kernel events");
+ ret = CMD_ERROR;
+ goto error;
+ }
+
channel_name = opt_channel_name;
handle = lttng_create_handle(session_name, &dom);
}
}
+ if (opt_exclude) {
+ ret = check_exclusion_subsets("*", opt_exclude,
+ &exclusion_count, &exclusion_list);
+ if (ret == CMD_ERROR) {
+ goto error;
+ }
+ }
if (!opt_filter) {
- ret = lttng_enable_event(handle, &ev, channel_name);
+ ret = lttng_enable_event_with_exclusions(handle,
+ &ev, channel_name,
+ NULL,
+ exclusion_count, exclusion_list);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
switch (opt_event_type) {
case LTTNG_EVENT_TRACEPOINT:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
- MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
+ char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
+ MSG("All %s tracepoints%s are enabled in channel %s for loglevel %s",
get_domain_str(dom.type),
+ exclusion_string,
print_channel_name(channel_name),
opt_loglevel);
+ free(exclusion_string);
} else {
- MSG("All %s tracepoints are enabled in channel %s",
+ char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
+ MSG("All %s tracepoints%s are enabled in channel %s",
get_domain_str(dom.type),
+ exclusion_string,
print_channel_name(channel_name));
+ free(exclusion_string);
}
break;
case LTTNG_EVENT_SYSCALL:
break;
case LTTNG_EVENT_ALL:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
- MSG("All %s events are enabled in channel %s for loglevel %s",
+ char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
+ MSG("All %s events%s are enabled in channel %s for loglevel %s",
get_domain_str(dom.type),
+ exclusion_string,
print_channel_name(channel_name),
opt_loglevel);
+ free(exclusion_string);
} else {
- MSG("All %s events are enabled in channel %s",
+ char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
+ MSG("All %s events%s are enabled in channel %s",
get_domain_str(dom.type),
+ exclusion_string,
print_channel_name(channel_name));
+ free(exclusion_string);
}
break;
default:
}
}
if (opt_filter) {
- ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
- opt_filter);
+ ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
+ opt_filter, exclusion_count, exclusion_list);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_FILTER_EXIST:
goto error;
}
+ if (opt_exclude) {
+ if (opt_event_type != LTTNG_EVENT_ALL && opt_event_type != LTTNG_EVENT_TRACEPOINT) {
+ ERR("Exclusion option can only be used with tracepoint events");
+ ret = CMD_ERROR;
+ goto error;
+ }
+ /* Free previously allocated items */
+ if (exclusion_list != NULL) {
+ while (exclusion_count--) {
+ free(exclusion_list[exclusion_count]);
+ }
+ free(exclusion_list);
+ exclusion_list = NULL;
+ }
+ /* Check for proper subsets */
+ ret = check_exclusion_subsets(event_name, opt_exclude,
+ &exclusion_count, &exclusion_list);
+ if (ret == CMD_ERROR) {
+ goto error;
+ }
+ }
+
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
ev.loglevel = loglevel_str_to_value(opt_loglevel);
}
if (!opt_filter) {
- ret = lttng_enable_event(handle, &ev, channel_name);
+ char *exclusion_string;
+
+ ret = lttng_enable_event_with_exclusions(handle,
+ &ev, channel_name,
+ NULL, exclusion_count, exclusion_list);
+ exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (ret < 0) {
/* Turn ret to positive value to handle the positive error code */
switch (-ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
- WARN("Kernel event %s already enabled (channel %s, session %s)",
+ WARN("Kernel event %s%s already enabled (channel %s, session %s)",
event_name,
+ exclusion_string,
print_channel_name(channel_name), session_name);
break;
default:
- ERR("Event %s: %s (channel %s, session %s)", event_name,
+ ERR("Event %s%s: %s (channel %s, session %s)", event_name,
+ exclusion_string,
lttng_strerror(ret),
ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
}
warn = 1;
} else {
- MSG("%s event %s created in channel %s",
+ MSG("%s event %s%s created in channel %s",
get_domain_str(dom.type), event_name,
+ exclusion_string,
print_channel_name(channel_name));
}
+ free(exclusion_string);
}
if (opt_filter) {
- ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
- opt_filter);
+ char *exclusion_string;
+
+ ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
+ opt_filter, exclusion_count, exclusion_list);
+ exclusion_string = print_exclusions(exclusion_count, exclusion_list);
+
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_FILTER_EXIST:
- WARN("Filter on event %s is already enabled"
+ WARN("Filter on event %s%s is already enabled"
" (channel %s, session %s)",
event_name,
+ exclusion_string,
print_channel_name(channel_name), session_name);
break;
default:
- ERR("Event %s: %s (channel %s, session %s, filter \'%s\')", ev.name,
+ ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
+ exclusion_string,
lttng_strerror(ret),
ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
}
goto error;
} else {
- MSG("Filter '%s' successfully set", opt_filter);
+ MSG("Event %s%s: Filter '%s' successfully set",
+ event_name, exclusion_string,
+ opt_filter);
}
+ free(exclusion_string);
}
/* Next event */
}
lttng_destroy_handle(handle);
+ if (exclusion_list != NULL) {
+ while (exclusion_count--) {
+ free(exclusion_list[exclusion_count]);
+ }
+ free(exclusion_list);
+ }
+
return ret;
}
projects / lttng-tools.git / blobdiff