fprintf(ofp, " TRACE_DEBUG = 14\n");
fprintf(ofp, " (shortcuts such as \"system\" are allowed)\n");
fprintf(ofp, " --filter \'expression\'\n");
- fprintf(ofp, " Filter expression on event fields,\n");
- fprintf(ofp, " event recording depends on evaluation.\n");
+ fprintf(ofp, " Filter expression on event fields and context.\n");
+ fprintf(ofp, " Event recording depends on evaluation.\n");
fprintf(ofp, " Only specify on first activation of\n");
fprintf(ofp, " a given event within a session.\n");
fprintf(ofp, " Filter only allowed when enabling\n");
fprintf(ofp, " 'seqfield1 == \"te*\"'\n");
fprintf(ofp, " In string literals, the escape character is '\\'.\n");
fprintf(ofp, " Use '\\*' for the '*' character, and '\\\\' for\n");
- fprintf(ofp, " the '\\' character.\n");
+ fprintf(ofp, " the '\\' character. Wildcard match any sequence of,\n");
+ fprintf(ofp, " characters including an empty sub-string (match 0 or\n");
+ fprintf(ofp, " more characters).\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, " Context information can be used for filtering. The\n");
+ fprintf(ofp, " examples below show usage of context filtering on\n");
+ fprintf(ofp, " process name (with a wildcard), process ID range, and\n");
+ fprintf(ofp, " unique thread ID for filtering. The process and\n");
+ fprintf(ofp, " thread ID of running applications can be found under\n");
+ fprintf(ofp, " columns \"PID\" and \"LWP\" of the \"ps -eLf\" command.\n");
+ fprintf(ofp, "\n");
+ fprintf(ofp, " '$ctx.procname == \"demo*\"'\n");
+ fprintf(ofp, " '$ctx.vpid >= 4433 && $ctx.vpid < 4455'\n");
+ fprintf(ofp, " '$ctx.vtid == 1234'\n");
fprintf(ofp, "\n");
}
strncpy(ev->attr.probe.symbol_name, name, LTTNG_SYMBOL_NAME_LEN);
ev->attr.probe.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
DBG("probe symbol %s", ev->attr.probe.symbol_name);
- if (strlen(s_hex) == 0) {
+ if (*s_hex == '\0') {
ERR("Invalid probe offset %s", s_hex);
ret = -1;
goto end;
/* Check for address */
ret = sscanf(opt, "%s", s_hex);
if (ret > 0) {
- if (strlen(s_hex) == 0) {
+ if (*s_hex == '\0') {
ERR("Invalid probe address %s", s_hex);
ret = -1;
goto end;
int i = 0;
char str[LTTNG_SYMBOL_NAME_LEN];
- while (inputstr[i] != '\0' && i < LTTNG_SYMBOL_NAME_LEN) {
+ while (i < LTTNG_SYMBOL_NAME_LEN && inputstr[i] != '\0') {
str[i] = toupper(inputstr[i]);
i++;
}
static int enable_events(char *session_name)
{
int err, ret = CMD_SUCCESS, warn = 0;
- unsigned int event_enabled = 0;
char *event_name, *channel_name = NULL;
struct lttng_event ev;
struct lttng_domain dom;
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
+ dom.buf_type = LTTNG_BUFFER_GLOBAL;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
+ /* Default. */
+ dom.buf_type = LTTNG_BUFFER_PER_PID;
} else {
ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
ret = CMD_ERROR;
}
}
- /* Reset flag before enabling a new event. */
- event_enabled = 0;
-
- ret = lttng_enable_event(handle, &ev, channel_name);
- if (ret < 0) {
- switch (-ret) {
- case LTTNG_ERR_KERN_EVENT_EXIST:
- WARN("Kernel events already enabled (channel %s, session %s)",
- channel_name, session_name);
- break;
- default:
- ERR("Events: %s (channel %s, session %s)",
- lttng_strerror(ret), channel_name, session_name);
- break;
+ if (!opt_filter) {
+ ret = lttng_enable_event(handle, &ev, channel_name);
+ if (ret < 0) {
+ switch (-ret) {
+ case LTTNG_ERR_KERN_EVENT_EXIST:
+ WARN("Kernel events already enabled (channel %s, session %s)",
+ channel_name, session_name);
+ break;
+ default:
+ ERR("Events: %s (channel %s, session %s)",
+ lttng_strerror(ret), channel_name, session_name);
+ break;
+ }
+ goto end;
}
- goto end;
- }
- event_enabled = 1;
- switch (opt_event_type) {
- case LTTNG_EVENT_TRACEPOINT:
- if (opt_loglevel) {
- MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
- opt_kernel ? "kernel" : "UST", channel_name,
- opt_loglevel);
- } else {
- MSG("All %s tracepoints are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
+ switch (opt_event_type) {
+ case LTTNG_EVENT_TRACEPOINT:
+ if (opt_loglevel) {
+ MSG("All %s tracepoints are enabled in channel %s for loglevel %s",
+ opt_kernel ? "kernel" : "UST", channel_name,
+ opt_loglevel);
+ } else {
+ MSG("All %s tracepoints are enabled in channel %s",
+ opt_kernel ? "kernel" : "UST", channel_name);
+ }
+ break;
+ case LTTNG_EVENT_SYSCALL:
+ if (opt_kernel) {
+ MSG("All kernel system calls are enabled in channel %s",
+ channel_name);
+ }
+ break;
+ case LTTNG_EVENT_ALL:
+ if (opt_loglevel) {
+ MSG("All %s events are enabled in channel %s for loglevel %s",
+ opt_kernel ? "kernel" : "UST", channel_name,
+ opt_loglevel);
+ } else {
+ MSG("All %s events are enabled in channel %s",
+ opt_kernel ? "kernel" : "UST", channel_name);
+ }
+ break;
+ default:
+ /*
+ * We should not be here since lttng_enable_event should have
+ * failed on the event type.
+ */
+ goto error;
}
- break;
- case LTTNG_EVENT_SYSCALL:
- if (opt_kernel) {
- MSG("All kernel system calls are enabled in channel %s",
- channel_name);
- }
- break;
- case LTTNG_EVENT_ALL:
- if (opt_loglevel) {
- MSG("All %s events are enabled in channel %s for loglevel %s",
- opt_kernel ? "kernel" : "UST", channel_name,
- opt_loglevel);
- } else {
- MSG("All %s events are enabled in channel %s",
- opt_kernel ? "kernel" : "UST", channel_name);
- }
- break;
- default:
- /*
- * We should not be here since lttng_enable_event should have
- * failed on the event type.
- */
- goto error;
}
- if (opt_filter && event_enabled) {
- ret = lttng_set_event_filter(handle, &ev, channel_name,
+ if (opt_filter) {
+ ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
opt_filter);
if (ret < 0) {
fprintf(stderr, "Ret filter: %d\n", ret);
ERR("%s", lttng_strerror(ret));
default:
ERR("Setting filter: '%s'", opt_filter);
- /*
- * The event was successfully enabled before so when
- * failing to set a filter, disable the event. This has
- * been discussed in bug #343 on why we do that.
- */
- err = lttng_disable_event(handle, ev.name, channel_name);
- if (err < 0) {
- ERR("Disabling all events after filter error: %s",
- lttng_strerror(err));
- } else {
- WARN("All events of channel %s have been disabled due "
- "to a filter error", channel_name);
- }
break;
}
goto error;
if (opt_loglevel) {
MSG("Kernel loglevels are not supported.");
- ret = CMD_UNDEFINED;
+ ret = CMD_UNSUPPORTED;
goto error;
}
case LTTNG_EVENT_SYSCALL:
default:
ERR("Event type not available for user-space tracing");
- ret = CMD_UNDEFINED;
+ ret = CMD_UNSUPPORTED;
goto error;
}
goto error;
}
- /* Reset flag before enabling a new event. */
- event_enabled = 0;
-
- ret = lttng_enable_event(handle, &ev, channel_name);
- 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)",
- event_name, channel_name, session_name);
- break;
- default:
- ERR("Event %s: %s (channel %s, session %s)", event_name,
- lttng_strerror(ret), channel_name, session_name);
- break;
+ if (!opt_filter) {
+ ret = lttng_enable_event(handle, &ev, channel_name);
+ 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)",
+ event_name, channel_name, session_name);
+ break;
+ default:
+ ERR("Event %s: %s (channel %s, session %s)", event_name,
+ lttng_strerror(ret), channel_name, session_name);
+ break;
+ }
+ warn = 1;
+ } else {
+ MSG("%s event %s created in channel %s",
+ opt_kernel ? "kernel": "UST", event_name, channel_name);
}
- warn = 1;
- } else {
- MSG("%s event %s created in channel %s",
- opt_kernel ? "kernel": "UST", event_name, channel_name);
- event_enabled = 1;
}
- if (opt_filter && event_enabled) {
- ret = lttng_set_event_filter(handle, &ev, channel_name,
+
+ if (opt_filter) {
+ ret = lttng_enable_event_with_filter(handle, &ev, channel_name,
opt_filter);
if (ret < 0) {
switch (-ret) {
default:
ERR("Setting filter for event %s: '%s'", ev.name,
opt_filter);
- /*
- * The event was successfully enabled before so when
- * failing to set a filter, disable the event. This has
- * been discussed in bug #343 on why we do that.
- */
- err = lttng_disable_event(handle, ev.name, channel_name);
- if (err < 0) {
- ERR("Disabling event %s after filter error: %s",
- ev.name, lttng_strerror(err));
- } else {
- WARN("Event %s of channel %s has been disabled due "
- "to a filter error", ev.name, channel_name);
- }
break;
}
goto error;
projects / lttng-tools.git / blobdiff