/*
* List JUL events for a specific session using the handle.
*
* Return CMD_SUCCESS on success else a negative value.
*/
static int list_session_jul_events(void)
{
int ret, count, i;
struct lttng_event *events = NULL;
count = lttng_list_events(handle, "", &events);
if (count < 0) {
ret = count;
ERR("%s", lttng_strerror(ret));
goto error;
}
MSG("Events (Logger name):\n---------------------");
if (count == 0) {
MSG("%sNone\n", indent6);
goto end;
}
for (i = 0; i < count; i++) {
MSG("%s- %s%s", indent4, events[i].name,
enabled_string(events[i].enabled));
}
MSG("");
end:
free(events);
ret = CMD_SUCCESS;
error:
return ret;
}
/*
* List events of channel of session and domain.
*/
static int list_events(const char *channel_name)
{
int ret, count, i;
struct lttng_event *events = NULL;
count = lttng_list_events(handle, channel_name, &events);
if (count < 0) {
ret = count;
ERR("%s", lttng_strerror(ret));
goto error;
}
MSG("\n%sEvents:", indent4);
if (count == 0) {
MSG("%sNone\n", indent6);
goto end;
}
for (i = 0; i < count; i++) {
print_events(&events[i]);
}
MSG("");
end:
free(events);
ret = CMD_SUCCESS;
error:
return ret;
}
/*
* destroy_session
*
* Unregister the provided session to the session daemon. On success, removes
* the default configuration.
*/
static int destroy_session(struct lttng_session *session)
{
int ret;
ret = lttng_destroy_session(session->name);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_SESS_NOT_FOUND:
WARN("Session name %s not found", session->name);
break;
default:
ERR("%s", lttng_strerror(ret));
break;
}
goto error;
}
MSG("Session %s destroyed", session->name);
config_destroy_default();
if (lttng_opt_mi) {
ret = mi_lttng_session(writer, session, 0);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
ret = CMD_SUCCESS;
error:
return ret;
}
/*
* List available domain(s) for a session.
*/
static int list_domains(const char *session_name)
{
int i, count, ret = CMD_SUCCESS;
struct lttng_domain *domains = NULL;
count = lttng_list_domains(session_name, &domains);
if (count < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto end;
}
if (lttng_opt_mi) {
/* Mi output */
ret = mi_list_domains(domains, count);
if (ret) {
ret = CMD_ERROR;
goto error;
}
} else {
/* Pretty print */
MSG("Domains:\n-------------");
if (count == 0) {
MSG(" None");
goto end;
}
for (i = 0; i < count; i++) {
switch (domains[i].type) {
case LTTNG_DOMAIN_KERNEL:
MSG(" - Kernel");
break;
case LTTNG_DOMAIN_UST:
MSG(" - UST global");
break;
case LTTNG_DOMAIN_JUL:
MSG(" - JUL (Java Util Logging)");
break;
case LTTNG_DOMAIN_LOG4J:
MSG(" - LOG4j (Logging for Java)");
break;
case LTTNG_DOMAIN_PYTHON:
MSG(" - Python (logging)");
break;
default:
break;
}
}
}
error:
free(domains);
end:
return ret;
}
/*
* set_session
*/
static int set_session(void)
{
int ret = CMD_SUCCESS;
int count, i;
unsigned int session_found = 0;
struct lttng_session *sessions;
if (opt_session_name && strlen(opt_session_name) > NAME_MAX) {
ERR("Session name too long. Length must be lower or equal to %d",
NAME_MAX);
ret = CMD_ERROR;
goto end;
}
count = lttng_list_sessions(&sessions);
if (count < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto end;
}
for (i = 0; i < count; i++) {
if (strncmp(sessions[i].name, opt_session_name, NAME_MAX) == 0) {
session_found = 1;
break;
}
}
if (!session_found) {
ERR("Session '%s' not found", opt_session_name);
ret = CMD_ERROR;
goto error;
}
ret = config_init(opt_session_name);
if (ret < 0) {
ERR("Unable to set session name");
ret = CMD_ERROR;
goto error;
}
MSG("Session set to %s", opt_session_name);
if (lttng_opt_mi) {
ret = mi_print(opt_session_name);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
ret = CMD_SUCCESS;
error:
free(sessions);
end:
return ret;
}
/*
* List available tracing session. List only basic information.
*
* If session_name is NULL, all sessions are listed.
*/
static int list_sessions(const char *session_name)
{
int ret, count, i;
unsigned int session_found = 0;
struct lttng_session *sessions;
count = lttng_list_sessions(&sessions);
DBG("Session count %d", count);
if (count < 0) {
ret = count;
ERR("%s", lttng_strerror(ret));
goto error;
} else if (count == 0) {
MSG("Currently no available tracing session");
goto end;
}
if (session_name == NULL) {
MSG("Available tracing sessions:");
}
for (i = 0; i < count; i++) {
if (session_name != NULL) {
if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
session_found = 1;
MSG("Tracing session %s: [%s%s]", session_name,
active_string(sessions[i].enabled),
snapshot_string(sessions[i].snapshot_mode));
MSG("%sTrace path: %s\n", indent4, sessions[i].path);
break;
}
} else {
MSG(" %d) %s (%s) [%s%s]", i + 1, sessions[i].name, sessions[i].path,
active_string(sessions[i].enabled),
snapshot_string(sessions[i].snapshot_mode));
}
}
free(sessions);
if (!session_found && session_name != NULL) {
ERR("Session '%s' not found", session_name);
ret = CMD_ERROR;
goto error;
}
if (session_name == NULL) {
MSG("\nUse lttng list <session_name> for more details");
}
end:
return CMD_SUCCESS;
error:
return ret;
}
/*
* Ask session daemon for all user space tracepoints available.
*/
static int list_ust_events(void)
{
int i, size;
struct lttng_domain domain;
struct lttng_handle *handle;
struct lttng_event *event_list;
pid_t cur_pid = 0;
char *cmdline = NULL;
memset(&domain, 0, sizeof(domain));
DBG("Getting UST tracing events");
domain.type = LTTNG_DOMAIN_UST;
handle = lttng_create_handle(NULL, &domain);
if (handle == NULL) {
goto error;
}
size = lttng_list_tracepoints(handle, &event_list);
if (size < 0) {
ERR("Unable to list UST events: %s", lttng_strerror(size));
lttng_destroy_handle(handle);
return size;
}
MSG("UST events:\n-------------");
if (size == 0) {
MSG("None");
}
for (i = 0; i < size; i++) {
if (cur_pid != event_list[i].pid) {
cur_pid = event_list[i].pid;
cmdline = get_cmdline_by_pid(cur_pid);
MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
free(cmdline);
}
print_events(&event_list[i]);
}
MSG("");
free(event_list);
lttng_destroy_handle(handle);
return CMD_SUCCESS;
error:
lttng_destroy_handle(handle);
return -1;
}
/*
* Ask for all trace events in the kernel
*/
static int list_kernel_events(void)
{
int i, size, ret = CMD_SUCCESS;
struct lttng_domain domain;
struct lttng_handle *handle;
struct lttng_event *event_list;
memset(&domain, 0, sizeof(domain));
DBG("Getting kernel tracing events");
domain.type = LTTNG_DOMAIN_KERNEL;
handle = lttng_create_handle(NULL, &domain);
if (handle == NULL) {
ret = CMD_ERROR;
goto error;
}
size = lttng_list_tracepoints(handle, &event_list);
if (size < 0) {
ERR("Unable to list kernel events: %s", lttng_strerror(size));
lttng_destroy_handle(handle);
return CMD_ERROR;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_kernel_events(event_list, size, &domain);
if (ret) {
ret = CMD_ERROR;
goto end;
}
} else {
MSG("Kernel events:\n-------------");
for (i = 0; i < size; i++) {
print_events(&event_list[i]);
}
MSG("");
}
end:
free(event_list);
lttng_destroy_handle(handle);
return ret;
error:
lttng_destroy_handle(handle);
return ret;
}
/*
* Retrieve the created session and mi output it based on provided argument
* This is currently a summary of what was pretty printed and is subject to
* enhancements.
*/
static int mi_created_session(const char *session_name)
{
int ret, i, count, found;
struct lttng_session *sessions;
/* session_name should not be null */
assert(session_name);
assert(writer);
count = lttng_list_sessions(&sessions);
if (count < 0) {
ret = count;
ERR("%s", lttng_strerror(ret));
goto error;
}
if (count == 0) {
ERR("Error session creation failed: session %s not found", session_name);
ret = -LTTNG_ERR_SESS_NOT_FOUND;
goto end;
}
found = 0;
for (i = 0; i < count; i++) {
if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
found = 1;
ret = mi_lttng_session(writer, &sessions[i], 0);
if (ret) {
goto error;
}
break;
}
}
if (!found) {
ret = -LTTNG_ERR_SESS_NOT_FOUND;
} else {
ret = CMD_SUCCESS;
}
error:
free(sessions);
end:
return ret;
}
/*
* List agent events for a specific session using the handle.
*
* Return CMD_SUCCESS on success else a negative value.
*/
static int list_session_agent_events(void)
{
int ret = CMD_SUCCESS, count, i;
struct lttng_event *events = NULL;
count = lttng_list_events(handle, "", &events);
if (count < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto error;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_session_agent_events(events, count);
if (ret) {
ret = CMD_ERROR;
goto end;
}
} else {
/* Pretty print */
MSG("Events (Logger name):\n---------------------");
if (count == 0) {
MSG("%sNone\n", indent6);
goto end;
}
for (i = 0; i < count; i++) {
MSG("%s- %s%s (loglevel%s %s)", indent4, events[i].name,
enabled_string(events[i].enabled),
logleveltype_string(events[i].loglevel_type),
mi_lttng_loglevel_string(events[i].loglevel,
handle->domain.type));
}
MSG("");
}
end:
free(events);
error:
return ret;
}
/*
* destroy_all_sessions
*
* Call destroy_sessions for each registered sessions
*/
static int destroy_all_sessions(struct lttng_session *sessions, int count)
{
int i, ret = CMD_SUCCESS;
if (count == 0) {
MSG("No session found, nothing to do.");
} else if (count < 0) {
ERR("%s", lttng_strerror(ret));
goto error;
}
for (i = 0; i < count; i++) {
ret = destroy_session(&sessions[i]);
if (ret < 0) {
goto error;
}
}
error:
return ret;
}
/*
* List available domain(s) for a session.
*/
static int list_domains(const char *session_name)
{
int i, count, ret = CMD_SUCCESS;
struct lttng_domain *domains = NULL;
MSG("Domains:\n-------------");
count = lttng_list_domains(session_name, &domains);
if (count < 0) {
ret = count;
ERR("%s", lttng_strerror(ret));
goto error;
} else if (count == 0) {
MSG(" None");
goto end;
}
for (i = 0; i < count; i++) {
switch (domains[i].type) {
case LTTNG_DOMAIN_KERNEL:
MSG(" - Kernel");
break;
case LTTNG_DOMAIN_UST:
MSG(" - UST global");
break;
case LTTNG_DOMAIN_JUL:
MSG(" - JUL (Java Util Logging)");
break;
default:
break;
}
}
end:
free(domains);
error:
return ret;
}
/*
* Ask for kernel system calls.
*/
static int list_syscalls(void)
{
int i, size, ret = CMD_SUCCESS;
struct lttng_event *event_list;
DBG("Getting kernel system call events");
size = lttng_list_syscalls(&event_list);
if (size < 0) {
ERR("Unable to list system calls: %s", lttng_strerror(size));
ret = CMD_ERROR;
goto error;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_syscalls(event_list, size);
if (ret) {
ret = CMD_ERROR;
goto end;
}
} else {
MSG("System calls:\n-------------");
for (i = 0; i < size; i++) {
print_events(&event_list[i]);
}
MSG("");
}
end:
free(event_list);
return ret;
error:
return ret;
}
/*
* List events of channel of session and domain.
*/
static int list_events(const char *channel_name)
{
int ret = CMD_SUCCESS, count, i;
struct lttng_event *events = NULL;
count = lttng_list_events(handle, channel_name, &events);
if (count < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto error;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_events(events, count);
if (ret) {
ret = CMD_ERROR;
goto end;
}
} else {
/* Pretty print */
MSG("\n%sEvents:", indent4);
if (count == 0) {
MSG("%sNone\n", indent6);
goto end;
}
for (i = 0; i < count; i++) {
print_events(&events[i]);
}
MSG("");
}
end:
free(events);
error:
return ret;
}
/*
* disable_events
*
* Disabling event using the lttng API.
*/
static int disable_events(char *session_name)
{
int ret = CMD_SUCCESS, warn = 0, command_ret = CMD_SUCCESS;
int enabled = 1, success = 1;
char *event_name, *channel_name = NULL;
struct lttng_domain dom;
struct lttng_event event;
memset(&dom, 0, sizeof(dom));
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
} else if (opt_jul) {
dom.type = LTTNG_DOMAIN_JUL;
} else if (opt_log4j) {
dom.type = LTTNG_DOMAIN_LOG4J;
} else if (opt_python) {
dom.type = LTTNG_DOMAIN_PYTHON;
} else {
/* Checked by the caller. */
assert(0);
}
channel_name = opt_channel_name;
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Mi print the channel and open the events element */
if (lttng_opt_mi) {
ret = mi_lttng_writer_open_element(writer, config_element_channel);
if (ret) {
ret = CMD_ERROR;
goto end;
}
ret = mi_lttng_writer_write_element_string(writer,
config_element_name, print_channel_name(channel_name));
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open events element */
ret = mi_lttng_writer_open_element(writer, config_element_events);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
memset(&event, 0, sizeof(event));
/* Set default loglevel to any/unknown */
event.loglevel = -1;
/* opt_event_type contain the event type to disable at this point */
event.type = opt_event_type;
if (opt_disable_all) {
command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
if (command_ret < 0) {
ERR("%s", lttng_strerror(command_ret));
enabled = 1;
success = 0;
} else {
enabled = 0;
success = 1;
MSG("All %s events of type %s are disabled in channel %s",
get_domain_str(dom.type),
print_event_type(opt_event_type),
print_channel_name(channel_name));
}
if (lttng_opt_mi) {
ret = mi_print_event("*", enabled, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
} else {
/* Strip event list */
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
DBG("Disabling event %s", event_name);
strncpy(event.name, event_name, sizeof(event.name));
event.name[sizeof(event.name) - 1] = '\0';
command_ret = lttng_disable_event_ext(handle, &event, channel_name, NULL);
if (command_ret < 0) {
ERR("%s of type %s : %s (channel %s, session %s)",
event_name,
print_event_type(opt_event_type),
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
warn = 1;
success = 0;
/*
* If an error occurred we assume that the event is still
* enabled.
*/
enabled = 1;
} else {
MSG("%s %s of type %s disabled in channel %s for session %s",
get_domain_str(dom.type),
event_name,
print_event_type(opt_event_type),
print_channel_name(channel_name),
session_name);
success = 1;
enabled = 0;
}
if (lttng_opt_mi) {
ret = mi_print_event(event_name, enabled, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Next event */
event_name = strtok(NULL, ",");
}
}
end:
if (lttng_opt_mi) {
/* Close events element and channel element */
ret = mi_lttng_close_multi_element(writer, 2);
if (ret) {
ret = CMD_ERROR;
}
}
error:
/* if there is already an error preserve it */
if (warn && !ret) {
ret = CMD_WARNING;
}
/* Overwrite ret if an error occurred */
ret = command_ret ? command_ret : ret;
lttng_destroy_handle(handle);
return ret;
}
/*
* Enabling event using the lttng API.
* Note: in case of error only the last error code will be return.
*/
static int enable_events(char *session_name)
{
int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
char *event_name, *channel_name = NULL;
struct lttng_event *ev;
struct lttng_domain dom;
char **exclusion_list = NULL;
memset(&dom, 0, sizeof(dom));
ev = lttng_event_create();
if (!ev) {
ret = CMD_ERROR;
goto error;
}
if (opt_kernel) {
if (opt_loglevel) {
WARN("Kernel loglevels are not supported.");
}
}
/* 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_UID;
} else if (opt_jul) {
dom.type = LTTNG_DOMAIN_JUL;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_log4j) {
dom.type = LTTNG_DOMAIN_LOG4J;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_python) {
dom.type = LTTNG_DOMAIN_PYTHON;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else {
/* Checked by the caller. */
assert(0);
}
if (opt_exclude) {
switch (dom.type) {
case LTTNG_DOMAIN_KERNEL:
case LTTNG_DOMAIN_JUL:
case LTTNG_DOMAIN_LOG4J:
case LTTNG_DOMAIN_PYTHON:
ERR("Event name exclusions are not yet implemented for %s events",
get_domain_str(dom.type));
ret = CMD_ERROR;
goto error;
case LTTNG_DOMAIN_UST:
/* Exclusions supported */
break;
default:
assert(0);
}
}
/*
* Adding a filter to a probe, function or userspace-probe would be
* denied by the kernel tracer as it's not supported at the moment. We
* do an early check here to warn the user.
*/
if (opt_filter && opt_kernel) {
switch (opt_event_type) {
case LTTNG_EVENT_ALL:
case LTTNG_EVENT_TRACEPOINT:
case LTTNG_EVENT_SYSCALL:
break;
case LTTNG_EVENT_PROBE:
case LTTNG_EVENT_USERSPACE_PROBE:
case LTTNG_EVENT_FUNCTION:
ERR("Filter expressions are not supported for %s events",
get_event_type_str(opt_event_type));
ret = CMD_ERROR;
goto error;
default:
ret = CMD_UNDEFINED;
goto error;
}
}
channel_name = opt_channel_name;
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Prepare Mi */
if (lttng_opt_mi) {
/* Open a events element */
ret = mi_lttng_writer_open_element(writer, config_element_events);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
if (opt_enable_all) {
/* Default setup for enable all */
if (opt_kernel) {
ev->type = opt_event_type;
strcpy(ev->name, "*");
/* kernel loglevels not implemented */
ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else {
ev->type = LTTNG_EVENT_TRACEPOINT;
strcpy(ev->name, "*");
ev->loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev->loglevel = loglevel_str_to_value(opt_loglevel);
} else if (opt_jul) {
ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev->loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev->loglevel = -1;
} else if (opt_jul) {
ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_log4j) {
ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
} else if (opt_python) {
ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
}
if (opt_exclude) {
ret = create_exclusion_list_and_validate("*",
opt_exclude, &exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
ev->exclusion = 1;
warn_on_truncated_exclusion_names(exclusion_list,
&warn);
}
if (!opt_filter) {
ret = lttng_enable_event_with_exclusions(handle,
ev, channel_name,
NULL,
exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
exclusion_list);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
WARN("Kernel events already enabled (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Events: %s (channel %s, session %s)",
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
default:
ERR("Events: %s (channel %s, session %s)",
lttng_strerror(ret),
ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
goto end;
}
switch (opt_event_type) {
case LTTNG_EVENT_TRACEPOINT:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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 {
char *exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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:
if (opt_kernel) {
MSG("All %s system calls are enabled in channel %s",
get_domain_str(dom.type),
print_channel_name(channel_name));
}
break;
case LTTNG_EVENT_ALL:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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 {
char *exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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:
/*
* We should not be here since lttng_enable_event should have
* failed on the event type.
*/
goto error;
}
}
if (opt_filter) {
command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
opt_filter,
exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
exclusion_list);
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on all events is already enabled"
" (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
ev->filter = 1;
MSG("Filter '%s' successfully set", opt_filter);
}
}
if (lttng_opt_mi) {
/* The wildcard * is used for kernel and ust domain to
* represent ALL. We copy * in event name to force the wildcard use
* for kernel domain
*
* Note: this is strictly for semantic and printing while in
* machine interface mode.
*/
strcpy(ev->name, "*");
/* If we reach here the events are enabled */
if (!error && !warn) {
ev->enabled = 1;
} else {
ev->enabled = 0;
success = 0;
}
ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
goto end;
}
/* Strip event list */
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
/* Copy name and type of the event */
strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
ev->type = opt_event_type;
/* Kernel tracer action */
if (opt_kernel) {
DBG("Enabling kernel event %s for channel %s",
event_name,
print_channel_name(channel_name));
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Enable tracepoints and syscalls */
/* If event name differs from *, select tracepoint. */
if (strcmp(ev->name, "*")) {
ev->type = LTTNG_EVENT_TRACEPOINT;
}
break;
case LTTNG_EVENT_TRACEPOINT:
break;
case LTTNG_EVENT_PROBE:
ret = parse_probe_opts(ev, opt_probe);
if (ret) {
ERR("Unable to parse probe options");
ret = CMD_ERROR;
goto error;
}
break;
case LTTNG_EVENT_USERSPACE_PROBE:
ret = parse_userspace_probe_opts(ev, opt_userspace_probe);
if (ret) {
switch (ret) {
case CMD_UNSUPPORTED:
/*
* Error message describing
* what is not supported was
* printed in the function.
*/
break;
case CMD_ERROR:
default:
ERR("Unable to parse userspace probe options");
break;
}
goto error;
}
break;
case LTTNG_EVENT_FUNCTION:
ret = parse_probe_opts(ev, opt_function);
if (ret) {
ERR("Unable to parse function probe options");
ret = CMD_ERROR;
goto error;
}
break;
case LTTNG_EVENT_SYSCALL:
ev->type = LTTNG_EVENT_SYSCALL;
break;
default:
ret = CMD_UNDEFINED;
goto error;
}
/* kernel loglevels not implemented */
ev->loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else if (opt_userspace) { /* User-space tracer action */
DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
print_channel_name(channel_name), opt_loglevel ? : "<all>");
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
/* Copy name and type of the event */
ev->type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_PROBE:
case LTTNG_EVENT_FUNCTION:
case LTTNG_EVENT_SYSCALL:
case LTTNG_EVENT_USERSPACE_PROBE:
default:
ERR("Event type not available for user-space tracing");
ret = CMD_UNSUPPORTED;
goto error;
}
if (opt_exclude) {
ev->exclusion = 1;
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 */
strutils_free_null_terminated_array_of_strings(
exclusion_list);
exclusion_list = NULL;
ret = create_exclusion_list_and_validate(
event_name, opt_exclude,
&exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
warn_on_truncated_exclusion_names(
exclusion_list, &warn);
}
ev->loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
ev->loglevel = loglevel_str_to_value(opt_loglevel);
if (ev->loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
ev->loglevel = -1;
}
} else if (opt_jul || opt_log4j || opt_python) {
if (opt_event_type != LTTNG_EVENT_ALL &&
opt_event_type != LTTNG_EVENT_TRACEPOINT) {
ERR("Event type not supported for domain.");
ret = CMD_UNSUPPORTED;
goto error;
}
ev->loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
if (opt_jul) {
ev->loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev->loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev->loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev->loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
if (opt_jul) {
ev->loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_log4j) {
ev->loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
} else if (opt_python) {
ev->loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
ev->type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev->name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev->name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
} else {
assert(0);
}
if (!opt_filter) {
char *exclusion_string;
command_ret = lttng_enable_event_with_exclusions(handle,
ev, channel_name,
NULL,
exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
exclusion_list);
exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
/* Turn ret to positive value to handle the positive error code */
switch (-command_ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
WARN("Kernel event %s%s already enabled (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
case LTTNG_ERR_SDT_PROBE_SEMAPHORE:
ERR("SDT probes %s guarded by semaphores are not supported (channel %s, session %s)",
event_name, print_channel_name(channel_name),
session_name);
error = 1;
break;
default:
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
error_holder = command_ret;
} else {
switch (dom.type) {
case LTTNG_DOMAIN_KERNEL:
case LTTNG_DOMAIN_UST:
MSG("%s event %s%s created in channel %s",
get_domain_str(dom.type),
event_name,
exclusion_string,
print_channel_name(channel_name));
break;
case LTTNG_DOMAIN_JUL:
case LTTNG_DOMAIN_LOG4J:
case LTTNG_DOMAIN_PYTHON:
/*
* Don't print the default channel
* name for agent domains.
*/
MSG("%s event %s%s enabled",
get_domain_str(dom.type),
event_name,
exclusion_string);
break;
default:
assert(0);
}
}
free(exclusion_string);
}
if (opt_filter) {
char *exclusion_string;
/* Filter present */
ev->filter = 1;
command_ret = lttng_enable_event_with_exclusions(handle, ev, channel_name,
opt_filter,
exclusion_list ? strutils_array_of_strings_len(exclusion_list) : 0,
exclusion_list);
exclusion_string = print_exclusions(exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on event %s%s is already enabled"
" (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev->name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
MSG("Event %s%s: Filter '%s' successfully set",
event_name, exclusion_string,
opt_filter);
}
free(exclusion_string);
}
if (lttng_opt_mi) {
if (command_ret) {
success = 0;
ev->enabled = 0;
} else {
ev->enabled = 1;
}
ret = mi_lttng_event(writer, ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Next event */
event_name = strtok(NULL, ",");
/* Reset warn, error and success */
success = 1;
}
/*
* Enabling event using the lttng API.
* Note: in case of error only the last error code will be return.
*/
static int enable_events(char *session_name)
{
int ret = CMD_SUCCESS, command_ret = CMD_SUCCESS;
int error_holder = CMD_SUCCESS, warn = 0, error = 0, success = 1;
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));
if (opt_kernel) {
if (opt_filter) {
ERR("Filter not implement for kernel tracing yet");
ret = CMD_ERROR;
goto error;
}
if (opt_loglevel) {
WARN("Kernel loglevels are not supported.");
}
}
/* 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_UID;
} else if (opt_jul) {
dom.type = LTTNG_DOMAIN_JUL;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_log4j) {
dom.type = LTTNG_DOMAIN_LOG4J;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else if (opt_python) {
dom.type = LTTNG_DOMAIN_PYTHON;
/* Default. */
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else {
print_missing_domain();
ret = CMD_ERROR;
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 (handle == NULL) {
ret = -1;
goto error;
}
/* Prepare Mi */
if (lttng_opt_mi) {
/* Open a events element */
ret = mi_lttng_writer_open_element(writer, config_element_events);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
if (opt_enable_all) {
/* Default setup for enable all */
if (opt_kernel) {
ev.type = opt_event_type;
ev.name[0] = '\0';
/* kernel loglevels not implemented */
ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else {
ev.type = LTTNG_EVENT_TRACEPOINT;
strcpy(ev.name, "*");
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev.loglevel = loglevel_str_to_value(opt_loglevel);
} else if (opt_jul) {
ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
assert(opt_userspace || opt_jul || opt_log4j || opt_python);
if (opt_userspace) {
ev.loglevel = -1;
} else if (opt_jul || opt_log4j) {
ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_python) {
ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
}
if (opt_exclude) {
ret = check_exclusion_subsets("*", opt_exclude,
&exclusion_count, &exclusion_list);
if (ret == CMD_ERROR) {
goto error;
}
ev.exclusion = 1;
}
if (!opt_filter) {
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:
WARN("Kernel events already enabled (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Events: %s (channel %s, session %s)",
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
default:
ERR("Events: %s (channel %s, session %s)",
lttng_strerror(ret),
ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
goto end;
}
switch (opt_event_type) {
case LTTNG_EVENT_TRACEPOINT:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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 {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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:
if (opt_kernel) {
MSG("All %s system calls are enabled in channel %s",
get_domain_str(dom.type),
print_channel_name(channel_name));
}
break;
case LTTNG_EVENT_ALL:
if (opt_loglevel && dom.type != LTTNG_DOMAIN_KERNEL) {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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 {
char *exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
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:
/*
* We should not be here since lttng_enable_event should have
* failed on the event type.
*/
goto error;
}
}
if (opt_filter) {
command_ret = lttng_enable_event_with_exclusions(handle, &ev, channel_name,
opt_filter, exclusion_count, exclusion_list);
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on all events is already enabled"
" (channel %s, session %s)",
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("All events: %s (channel %s, session %s, filter \'%s\')",
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
ev.filter = 1;
MSG("Filter '%s' successfully set", opt_filter);
}
}
if (lttng_opt_mi) {
/* The wildcard * is used for kernel and ust domain to
* represent ALL. We copy * in event name to force the wildcard use
* for kernel domain
*
* Note: this is strictly for semantic and printing while in
* machine interface mode.
*/
strcpy(ev.name, "*");
/* If we reach here the events are enabled */
if (!error && !warn) {
ev.enabled = 1;
} else {
ev.enabled = 0;
success = 0;
}
ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_count, exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
goto end;
}
/* Strip event list */
event_name = strtok(opt_event_list, ",");
while (event_name != NULL) {
/* Copy name and type of the event */
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
ev.type = opt_event_type;
/* Kernel tracer action */
if (opt_kernel) {
DBG("Enabling kernel event %s for channel %s",
event_name,
print_channel_name(channel_name));
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
ev.type = LTTNG_EVENT_TRACEPOINT;
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
break;
case LTTNG_EVENT_PROBE:
ret = parse_probe_opts(&ev, opt_probe);
if (ret) {
ERR("Unable to parse probe options");
ret = 0;
goto error;
}
break;
case LTTNG_EVENT_FUNCTION:
ret = parse_probe_opts(&ev, opt_function);
if (ret) {
ERR("Unable to parse function probe options");
ret = 0;
goto error;
}
break;
case LTTNG_EVENT_FUNCTION_ENTRY:
strncpy(ev.attr.ftrace.symbol_name, opt_function_entry_symbol,
LTTNG_SYMBOL_NAME_LEN);
ev.attr.ftrace.symbol_name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_SYSCALL:
ev.type = LTTNG_EVENT_SYSCALL;
break;
default:
ret = CMD_UNDEFINED;
goto error;
}
/* kernel loglevels not implemented */
ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;
} else if (opt_userspace) { /* User-space tracer action */
#if 0
if (opt_cmd_name != NULL || opt_pid) {
MSG("Only supporting tracing all UST processes (-u) for now.");
ret = CMD_UNDEFINED;
goto error;
}
#endif
DBG("Enabling UST event %s for channel %s, loglevel %s", event_name,
print_channel_name(channel_name), opt_loglevel ? : "<all>");
switch (opt_event_type) {
case LTTNG_EVENT_ALL: /* Default behavior is tracepoint */
/* Fall-through */
case LTTNG_EVENT_TRACEPOINT:
/* Copy name and type of the event */
ev.type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
break;
case LTTNG_EVENT_PROBE:
case LTTNG_EVENT_FUNCTION:
case LTTNG_EVENT_FUNCTION_ENTRY:
case LTTNG_EVENT_SYSCALL:
default:
ERR("Event type not available for user-space tracing");
ret = CMD_UNSUPPORTED;
goto error;
}
if (opt_exclude) {
ev.exclusion = 1;
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 (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
ev.loglevel = -1;
}
} else if (opt_jul || opt_log4j || opt_python) {
if (opt_event_type != LTTNG_EVENT_ALL &&
opt_event_type != LTTNG_EVENT_TRACEPOINT) {
ERR("Event type not supported for domain.");
ret = CMD_UNSUPPORTED;
goto error;
}
ev.loglevel_type = opt_loglevel_type;
if (opt_loglevel) {
if (opt_jul) {
ev.loglevel = loglevel_jul_str_to_value(opt_loglevel);
} else if (opt_log4j) {
ev.loglevel = loglevel_log4j_str_to_value(opt_loglevel);
} else if (opt_python) {
ev.loglevel = loglevel_python_str_to_value(opt_loglevel);
}
if (ev.loglevel == -1) {
ERR("Unknown loglevel %s", opt_loglevel);
ret = -LTTNG_ERR_INVALID;
goto error;
}
} else {
if (opt_jul) {
ev.loglevel = LTTNG_LOGLEVEL_JUL_ALL;
} else if (opt_log4j) {
ev.loglevel = LTTNG_LOGLEVEL_LOG4J_ALL;
} else if (opt_python) {
ev.loglevel = LTTNG_LOGLEVEL_PYTHON_DEBUG;
}
}
ev.type = LTTNG_EVENT_TRACEPOINT;
strncpy(ev.name, event_name, LTTNG_SYMBOL_NAME_LEN);
ev.name[LTTNG_SYMBOL_NAME_LEN - 1] = '\0';
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
if (!opt_filter) {
char *exclusion_string;
command_ret = lttng_enable_event_with_exclusions(handle,
&ev, channel_name,
NULL, exclusion_count, exclusion_list);
exclusion_string = print_exclusions(exclusion_count, exclusion_list);
if (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
/* Turn ret to positive value to handle the positive error code */
switch (-command_ret) {
case LTTNG_ERR_KERN_EVENT_EXIST:
WARN("Kernel event %s%s already enabled (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name);
error = 1;
break;
}
default:
ERR("Event %s%s: %s (channel %s, session %s)", event_name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name);
error = 1;
break;
}
error_holder = command_ret;
} else {
/* So we don't print the default channel name for agent domain. */
if (dom.type == LTTNG_DOMAIN_JUL ||
dom.type == LTTNG_DOMAIN_LOG4J) {
MSG("%s event %s%s enabled.",
get_domain_str(dom.type), event_name,
exclusion_string);
} else {
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) {
char *exclusion_string;
/* Filter present */
ev.filter = 1;
command_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 (!exclusion_string) {
PERROR("Cannot allocate exclusion_string");
error = 1;
goto end;
}
if (command_ret < 0) {
switch (-command_ret) {
case LTTNG_ERR_FILTER_EXIST:
WARN("Filter on event %s%s is already enabled"
" (channel %s, session %s)",
event_name,
exclusion_string,
print_channel_name(channel_name), session_name);
warn = 1;
break;
case LTTNG_ERR_TRACE_ALREADY_STARTED:
{
const char *msg = "The command tried to enable an event in a new domain for a session that has already been started once.";
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
exclusion_string,
msg,
print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
default:
ERR("Event %s%s: %s (channel %s, session %s, filter \'%s\')", ev.name,
exclusion_string,
lttng_strerror(command_ret),
command_ret == -LTTNG_ERR_NEED_CHANNEL_NAME
? print_raw_channel_name(channel_name)
: print_channel_name(channel_name),
session_name, opt_filter);
error = 1;
break;
}
error_holder = command_ret;
} else {
MSG("Event %s%s: Filter '%s' successfully set",
event_name, exclusion_string,
opt_filter);
}
free(exclusion_string);
}
if (lttng_opt_mi) {
if (command_ret) {
success = 0;
ev.enabled = 0;
} else {
ev.enabled = 1;
}
ret = mi_lttng_event(writer, &ev, 1, handle->domain.type);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* print exclusion */
ret = mi_print_exclusion(exclusion_count, exclusion_list);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Close event element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Next event */
event_name = strtok(NULL, ",");
/* Reset warn, error and success */
success = 1;
}
static
enum cmd_error_code track_untrack_pid(enum cmd_type cmd_type, const char *cmd_str,
const char *session_name, const char *pid_string,
int all, struct mi_writer *writer)
{
int ret, success = 1 , i;
enum cmd_error_code retval = CMD_SUCCESS;
int *pid_list = NULL;
int nr_pids;
struct lttng_domain dom;
struct lttng_handle *handle = NULL;
int (*cmd_func)(struct lttng_handle *handle, int pid);
switch (cmd_type) {
case CMD_TRACK:
cmd_func = lttng_track_pid;
break;
case CMD_UNTRACK:
cmd_func = lttng_untrack_pid;
break;
default:
ERR("Unknown command");
retval = CMD_ERROR;
goto end;
}
memset(&dom, 0, sizeof(dom));
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
} else {
/* Checked by the caller. */
assert(0);
}
ret = parse_pid_string(pid_string, all, &pid_list, &nr_pids);
if (ret != CMD_SUCCESS) {
ERR("Error parsing PID string");
retval = CMD_ERROR;
goto end;
}
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
retval = CMD_ERROR;
goto end;
}
if (writer) {
/* Open process element */
ret = mi_lttng_targets_open(writer);
if (ret) {
retval = CMD_ERROR;
goto end;
}
}
for (i = 0; i < nr_pids; i++) {
DBG("%s PID %d", cmd_str, pid_list[i]);
ret = cmd_func(handle, pid_list[i]);
if (ret) {
switch (-ret) {
case LTTNG_ERR_PID_TRACKED:
WARN("PID %i already tracked in session %s",
pid_list[i], session_name);
success = 1;
retval = CMD_SUCCESS;
break;
case LTTNG_ERR_PID_NOT_TRACKED:
WARN("PID %i not tracked in session %s",
pid_list[i], session_name);
success = 1;
retval = CMD_SUCCESS;
break;
default:
ERR("%s", lttng_strerror(ret));
success = 0;
retval = CMD_ERROR;
break;
}
} else {
MSG("PID %i %sed in session %s",
pid_list[i], cmd_str, session_name);
success = 1;
}
/* Mi */
if (writer) {
ret = mi_lttng_pid_target(writer, pid_list[i], 1);
if (ret) {
retval = CMD_ERROR;
goto end;
}
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_success, success);
if (ret) {
retval = CMD_ERROR;
goto end;
}
ret = mi_lttng_writer_close_element(writer);
if (ret) {
retval = CMD_ERROR;
goto end;
}
}
}
if (writer) {
/* Close targets element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
retval = CMD_ERROR;
goto end;
}
}
end:
if (handle) {
lttng_destroy_handle(handle);
}
free(pid_list);
return retval;
}
/*
* Start tracing for all trace of the session.
*/
static int stop_tracing(void)
{
int ret;
char *session_name;
if (opt_session_name == NULL) {
session_name = get_session_name();
if (session_name == NULL) {
ret = CMD_ERROR;
goto error;
}
} else {
session_name = opt_session_name;
}
ret = lttng_stop_tracing_no_wait(session_name);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_TRACE_ALREADY_STOPPED:
WARN("Tracing already stopped for session %s", session_name);
break;
default:
ERR("%s", lttng_strerror(ret));
break;
}
goto free_name;
}
if (!opt_no_wait) {
_MSG("Waiting for data availability");
fflush(stdout);
do {
ret = lttng_data_pending(session_name);
if (ret < 0) {
/* Return the data available call error. */
goto free_name;
}
/*
* Data sleep time before retrying (in usec). Don't sleep if the call
* returned value indicates availability.
*/
if (ret) {
usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
_MSG(".");
fflush(stdout);
}
} while (ret != 0);
MSG("");
}
ret = CMD_SUCCESS;
print_session_stats(session_name);
MSG("Tracing stopped for session %s", session_name);
if (lttng_opt_mi) {
ret = mi_print_session(session_name, 0);
if (ret) {
goto free_name;
}
}
free_name:
if (opt_session_name == NULL) {
free(session_name);
}
error:
return ret;
}
/*
* The 'destroy <options>' first level command
*/
int cmd_destroy(int argc, const char **argv)
{
int opt;
int ret = CMD_SUCCESS , i, command_ret = CMD_SUCCESS, success = 1;
static poptContext pc;
char *session_name = NULL;
const char *leftover = NULL;
struct lttng_session *sessions;
int count;
int found;
pc = poptGetContext(NULL, argc, argv, long_options, 0);
poptReadDefaultConfig(pc, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
SHOW_HELP();
break;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
break;
default:
ret = CMD_UNDEFINED;
break;
}
goto end;
}
/* Mi preparation */
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
ret = -LTTNG_ERR_NOMEM;
goto end;
}
/* Open command element */
ret = mi_lttng_writer_command_open(writer,
mi_lttng_element_command_destroy);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open output element */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* For validation and semantic purpose we open a sessions element */
ret = mi_lttng_sessions_open(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Recuperate all sessions for further operation */
count = lttng_list_sessions(&sessions);
if (count < 0) {
ERR("%s", lttng_strerror(count));
command_ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
/* Ignore session name in case all sessions are to be destroyed */
if (opt_destroy_all) {
command_ret = destroy_all_sessions(sessions, count);
if (command_ret) {
success = 0;
}
} else {
opt_session_name = (char *) poptGetArg(pc);
if (!opt_session_name) {
/* No session name specified, lookup default */
session_name = get_session_name();
if (session_name == NULL) {
command_ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
} else {
session_name = opt_session_name;
}
/* Find the corresponding lttng_session struct */
found = 0;
for (i = 0; i < count; i++) {
if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
found = 1;
command_ret = destroy_session(&sessions[i]);
if (command_ret) {
success = 0;
}
}
}
if (!found) {
ERR("Session name %s not found", session_name);
command_ret = LTTNG_ERR_SESS_NOT_FOUND;
success = 0;
goto mi_closing;
}
}
leftover = poptGetArg(pc);
if (leftover) {
ERR("Unknown argument: %s", leftover);
ret = CMD_ERROR;
success = 0;
goto mi_closing;
}
mi_closing:
/* Mi closing */
if (lttng_opt_mi) {
/* Close sessions and output element element */
ret = mi_lttng_close_multi_element(writer, 2);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
end:
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
}
if (opt_session_name == NULL) {
free(session_name);
}
/* Overwrite ret if an error occurred during destroy_session/all */
ret = command_ret ? command_ret : ret;
poptFreeContext(pc);
return ret;
}
/*
* The 'snapshot <cmd> <options>' first level command
*/
int cmd_snapshot(int argc, const char **argv)
{
int opt, ret = CMD_SUCCESS, command_ret = CMD_SUCCESS, success = 1;
char *session_name = NULL;
static poptContext pc;
pc = poptGetContext(NULL, argc, argv, snapshot_opts, 0);
poptReadDefaultConfig(pc, 0);
/* Mi check */
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
ret = -LTTNG_ERR_NOMEM;
goto end;
}
/* Open command element */
ret = mi_lttng_writer_command_open(writer,
mi_lttng_element_command_snapshot);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open output element */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
usage(stdout);
goto end;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, snapshot_opts);
goto end;
case OPT_LIST_COMMANDS:
list_commands(actions, stdout);
goto end;
case OPT_MAX_SIZE:
{
uint64_t val;
const char *opt = poptGetOptArg(pc);
if (utils_parse_size_suffix((char *) opt, &val) < 0) {
ERR("Unable to handle max-size value %s", opt);
ret = CMD_ERROR;
goto end;
}
opt_max_size = val;
break;
}
default:
usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
if (!opt_session_name) {
session_name = get_session_name();
if (session_name == NULL) {
ret = CMD_ERROR;
goto end;
}
current_session_name = session_name;
} else {
current_session_name = opt_session_name;
}
command_ret = handle_command(poptGetArgs(pc));
if (command_ret) {
switch (-command_ret) {
case LTTNG_ERR_EPERM:
ERR("The session needs to be set in no output mode (--no-output)");
break;
case LTTNG_ERR_SNAPSHOT_NODATA:
WARN("%s", lttng_strerror(command_ret));
break;
default:
ERR("%s", lttng_strerror(command_ret));
break;
}
success = 0;
}
if (lttng_opt_mi) {
/* Close output element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
end:
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
}
if (!opt_session_name) {
free(session_name);
}
/* Overwrite ret if an error occured during handle_command */
ret = command_ret ? command_ret : ret;
poptFreeContext(pc);
return ret;
}
int main(int argc, char **argv)
{
int ret = 0;
enum lttng_condition_status condition_status;
enum lttng_notification_channel_status nc_status;
struct lttng_notification_channel *notification_channel = NULL;
struct lttng_condition *condition = NULL;
struct lttng_action *action = NULL;
struct lttng_trigger *trigger = NULL;
/*
* Disable buffering on stdout.
* Safety measure to prevent hang on the validation side since
* stdout is used for outside synchronization.
*/
setbuf(stdout, NULL);
if (argc < 8) {
printf("error: Missing arguments for tests\n");
ret = 1;
goto end;
}
ret = parse_arguments(argv);
if (ret) {
printf("error: Could not parse arguments\n");
goto end;
}
/* Setup */
notification_channel = lttng_notification_channel_create(
lttng_session_daemon_notification_endpoint);
if (!notification_channel) {
printf("error: Could not create notification channel\n");
ret = 1;
goto end;
}
switch (buffer_usage_type) {
case LTTNG_CONDITION_TYPE_BUFFER_USAGE_LOW:
condition = lttng_condition_buffer_usage_low_create();
break;
case LTTNG_CONDITION_TYPE_BUFFER_USAGE_HIGH:
condition = lttng_condition_buffer_usage_high_create();
break;
default:
printf("error: Invalid buffer_usage_type\n");
ret = 1;
goto end;
}
if (!condition) {
printf("error: Could not create condition object\n");
ret = 1;
goto end;
}
if (is_threshold_ratio) {
condition_status = lttng_condition_buffer_usage_set_threshold_ratio(
condition, threshold_ratio);
} else {
condition_status = lttng_condition_buffer_usage_set_threshold(
condition, threshold_bytes);
}
if (condition_status != LTTNG_CONDITION_STATUS_OK) {
printf("error: Could not set threshold\n");
ret = 1;
goto end;
}
condition_status = lttng_condition_buffer_usage_set_session_name(
condition, session_name);
if (condition_status != LTTNG_CONDITION_STATUS_OK) {
printf("error: Could not set session name\n");
ret = 1;
goto end;
}
condition_status = lttng_condition_buffer_usage_set_channel_name(
condition, channel_name);
if (condition_status != LTTNG_CONDITION_STATUS_OK) {
printf("error: Could not set channel name\n");
ret = 1;
goto end;
}
condition_status = lttng_condition_buffer_usage_set_domain_type(
condition, domain_type);
if (condition_status != LTTNG_CONDITION_STATUS_OK) {
printf("error: Could not set domain type\n");
ret = 1;
goto end;
}
action = lttng_action_notify_create();
if (!action) {
printf("error: Could not create action notify\n");
ret = 1;
goto end;
}
trigger = lttng_trigger_create(condition, action);
if (!trigger) {
printf("error: Could not create trigger\n");
ret = 1;
goto end;
}
ret = lttng_register_trigger(trigger);
/*
* An equivalent trigger might already be registered if an other app
* registered an equivalent trigger.
*/
if (ret < 0 && ret != -LTTNG_ERR_TRIGGER_EXISTS) {
printf("error: %s\n", lttng_strerror(ret));
ret = 1;
goto end;
}
nc_status = lttng_notification_channel_subscribe(notification_channel, condition);
if (nc_status != LTTNG_NOTIFICATION_CHANNEL_STATUS_OK) {
printf("error: Could not subscribe\n");
ret = 1;
goto end;
}
/* Tell outside process that the client is ready */
printf("sync: ready\n");
for (;;) {
struct lttng_notification *notification;
enum lttng_notification_channel_status status;
const struct lttng_evaluation *notification_evaluation;
const struct lttng_condition *notification_condition;
if (nr_notifications == nr_expected_notifications) {
ret = 0;
goto end;
}
/* Receive the next notification. */
status = lttng_notification_channel_get_next_notification(
notification_channel,
¬ification);
switch (status) {
case LTTNG_NOTIFICATION_CHANNEL_STATUS_OK:
break;
case LTTNG_NOTIFICATION_CHANNEL_STATUS_NOTIFICATIONS_DROPPED:
ret = 1;
printf("error: No drop should be observed during this test app\n");
goto end;
case LTTNG_NOTIFICATION_CHANNEL_STATUS_CLOSED:
/*
* The notification channel has been closed by the
* session daemon. This is typically caused by a session
* daemon shutting down (cleanly or because of a crash).
*/
printf("error: Notification channel was closed\n");
ret = 1;
goto end;
default:
/* Unhandled conditions / errors. */
printf("error: Unknown notification channel status\n");
ret = 1;
goto end;
}
notification_condition = lttng_notification_get_condition(notification);
notification_evaluation = lttng_notification_get_evaluation(notification);
ret = handle_condition(notification_condition, notification_evaluation);
nr_notifications++;
lttng_notification_destroy(notification);
if (ret != 0) {
goto end;
}
}
end:
if (trigger) {
lttng_unregister_trigger(trigger);
}
if (lttng_notification_channel_unsubscribe(notification_channel, condition)) {
printf("error: channel unsubscribe error\n");
}
lttng_trigger_destroy(trigger);
lttng_condition_destroy(condition);
lttng_action_destroy(action);
lttng_notification_channel_destroy(notification_channel);
printf("exit: %d\n", ret);
return ret;
}
/*
* List available tracing session. List only basic information.
*
* If session_name is NULL, all sessions are listed.
*/
static int list_sessions(const char *session_name)
{
int ret = CMD_SUCCESS;
int count, i;
unsigned int session_found = 0;
struct lttng_session *sessions;
count = lttng_list_sessions(&sessions);
DBG("Session count %d", count);
if (count < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto end;
}
if (lttng_opt_mi) {
/* Mi */
if (session_name == NULL) {
/* List all session */
ret = mi_list_sessions(sessions, count);
} else {
/* Note : this return an open session element */
ret = mi_list_session(session_name, sessions, count);
}
if (ret) {
ret = CMD_ERROR;
goto error;
}
} else {
/* Pretty print */
if (count == 0) {
MSG("Currently no available tracing session");
goto end;
}
if (session_name == NULL) {
MSG("Available tracing sessions:");
}
for (i = 0; i < count; i++) {
if (session_name != NULL) {
if (strncmp(sessions[i].name, session_name, NAME_MAX) == 0) {
session_found = 1;
MSG("Tracing session %s: [%s%s]", session_name,
active_string(sessions[i].enabled),
snapshot_string(sessions[i].snapshot_mode));
MSG("%sTrace path: %s\n", indent4, sessions[i].path);
break;
}
} else {
MSG(" %d) %s (%s) [%s%s]", i + 1,
sessions[i].name, sessions[i].path,
active_string(sessions[i].enabled),
snapshot_string(sessions[i].snapshot_mode));
MSG("%sTrace path: %s", indent4, sessions[i].path);
if (sessions[i].live_timer_interval != 0) {
MSG("%sLive timer interval (usec): %u", indent4,
sessions[i].live_timer_interval);
}
MSG("");
}
}
if (!session_found && session_name != NULL) {
ERR("Session '%s' not found", session_name);
ret = CMD_ERROR;
goto error;
}
if (session_name == NULL) {
MSG("\nUse lttng list <session_name> for more details");
}
}
error:
free(sessions);
end:
return ret;
}
/*
* List channel(s) of session and domain.
*
* If channel_name is NULL, all channels are listed.
*/
static int list_channels(const char *channel_name)
{
int count, i, ret = CMD_SUCCESS;
unsigned int chan_found = 0;
struct lttng_channel *channels = NULL;
DBG("Listing channel(s) (%s)", channel_name ? : "<all>");
count = lttng_list_channels(handle, &channels);
if (count < 0) {
switch (-count) {
case LTTNG_ERR_KERN_CHAN_NOT_FOUND:
if (lttng_opt_mi) {
/* When printing mi this is not an error
* but an empty channels element */
count = 0;
} else {
ret = CMD_SUCCESS;
WARN("No kernel channel");
goto error_channels;
}
break;
default:
/* We had a real error */
ret = CMD_ERROR;
ERR("%s", lttng_strerror(count));
goto error_channels;
break;
}
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_channels(channels, count, channel_name);
if (ret) {
ret = CMD_ERROR;
goto error;
}
} else {
/* Pretty print */
if (count) {
MSG("Channels:\n-------------");
}
for (i = 0; i < count; i++) {
if (channel_name != NULL) {
if (strncmp(channels[i].name, channel_name, NAME_MAX) == 0) {
chan_found = 1;
} else {
continue;
}
}
print_channel(&channels[i]);
/* Listing events per channel */
ret = list_events(channels[i].name);
if (ret) {
goto error;
}
if (chan_found) {
break;
}
}
if (!chan_found && channel_name != NULL) {
ret = CMD_ERROR;
ERR("Channel %s not found", channel_name);
goto error;
}
}
error:
free(channels);
error_channels:
return ret;
}
/*
* destroy_session
*
* Unregister the provided session to the session daemon. On success, removes
* the default configuration.
*/
static int destroy_session(struct lttng_session *session)
{
int ret;
char *session_name = NULL;
bool session_was_stopped;
ret = lttng_stop_tracing_no_wait(session->name);
if (ret < 0 && ret != -LTTNG_ERR_TRACE_ALREADY_STOPPED) {
ERR("%s", lttng_strerror(ret));
}
session_was_stopped = ret == -LTTNG_ERR_TRACE_ALREADY_STOPPED;
if (!opt_no_wait) {
bool printed_wait_msg = false;
do {
ret = lttng_data_pending(session->name);
if (ret < 0) {
/* Return the data available call error. */
goto error;
}
/*
* Data sleep time before retrying (in usec). Don't sleep if the call
* returned value indicates availability.
*/
if (ret) {
if (!printed_wait_msg) {
_MSG("Waiting for data availability");
fflush(stdout);
}
printed_wait_msg = true;
usleep(DEFAULT_DATA_AVAILABILITY_WAIT_TIME);
_MSG(".");
fflush(stdout);
}
} while (ret != 0);
if (printed_wait_msg) {
MSG("");
}
}
if (!session_was_stopped) {
/*
* Don't print the event and packet loss warnings since the user
* already saw them when stopping the trace.
*/
print_session_stats(session->name);
}
ret = lttng_destroy_session_no_wait(session->name);
if (ret < 0) {
goto error;
}
MSG("Session %s destroyed", session->name);
session_name = get_session_name_quiet();
if (session_name && !strncmp(session->name, session_name, NAME_MAX)) {
config_destroy_default();
}
if (lttng_opt_mi) {
ret = mi_lttng_session(writer, session, 0);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
ret = CMD_SUCCESS;
error:
free(session_name);
return ret;
}
/*
* Ask session daemon for all user space tracepoint fields available.
*/
static int list_ust_event_fields(void)
{
int i, size, ret = CMD_SUCCESS;
struct lttng_domain domain;
struct lttng_handle *handle;
struct lttng_event_field *event_field_list;
pid_t cur_pid = 0;
char *cmdline = NULL;
struct lttng_event cur_event;
memset(&domain, 0, sizeof(domain));
memset(&cur_event, 0, sizeof(cur_event));
DBG("Getting UST tracing event fields");
domain.type = LTTNG_DOMAIN_UST;
handle = lttng_create_handle(NULL, &domain);
if (handle == NULL) {
ret = CMD_ERROR;
goto end;
}
size = lttng_list_tracepoint_fields(handle, &event_field_list);
if (size < 0) {
ERR("Unable to list UST event fields: %s", lttng_strerror(size));
ret = CMD_ERROR;
goto end;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_ust_event_fields(event_field_list, size, &domain);
if (ret) {
ret = CMD_ERROR;
goto error;
}
} else {
/* Pretty print */
MSG("UST events:\n-------------");
if (size == 0) {
MSG("None");
}
for (i = 0; i < size; i++) {
if (cur_pid != event_field_list[i].event.pid) {
cur_pid = event_field_list[i].event.pid;
cmdline = get_cmdline_by_pid(cur_pid);
if (cmdline == NULL) {
ret = CMD_ERROR;
goto error;
}
MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
free(cmdline);
/* Wipe current event since we are about to print a new PID. */
memset(&cur_event, 0, sizeof(cur_event));
}
if (strcmp(cur_event.name, event_field_list[i].event.name) != 0) {
print_events(&event_field_list[i].event);
memcpy(&cur_event, &event_field_list[i].event,
sizeof(cur_event));
}
print_event_field(&event_field_list[i]);
}
MSG("");
}
error:
free(event_field_list);
end:
lttng_destroy_handle(handle);
return ret;
}
/*
* Adding channel using the lttng API.
*/
static int enable_channel(char *session_name)
{
int ret = CMD_SUCCESS, warn = 0, error = 0, success = 0;
char *channel_name;
struct lttng_domain dom;
memset(&dom, 0, sizeof(dom));
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
dom.buf_type = LTTNG_BUFFER_GLOBAL;
if (opt_buffer_uid || opt_buffer_pid) {
ERR("Buffer type not supported for domain -k");
ret = CMD_ERROR;
goto error;
}
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
if (opt_buffer_pid) {
dom.buf_type = LTTNG_BUFFER_PER_PID;
} else {
if (opt_buffer_global) {
ERR("Buffer type not supported for domain -u");
ret = CMD_ERROR;
goto error;
}
dom.buf_type = LTTNG_BUFFER_PER_UID;
}
} else {
print_missing_domain();
ret = CMD_ERROR;
goto error;
}
set_default_attr(&dom);
if (chan.attr.tracefile_size == 0 && chan.attr.tracefile_count) {
ERR("Missing option --tracefile-size. "
"A file count without a size won't do anything.");
ret = CMD_ERROR;
goto error;
}
if ((chan.attr.tracefile_size > 0) &&
(chan.attr.tracefile_size < chan.attr.subbuf_size)) {
WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")",
chan.attr.tracefile_size, chan.attr.subbuf_size);
chan.attr.tracefile_size = chan.attr.subbuf_size;
}
/* Setting channel output */
if (opt_output) {
if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) {
chan.attr.output = LTTNG_EVENT_MMAP;
} else if (!strncmp(output_splice, opt_output, strlen(output_splice))) {
chan.attr.output = LTTNG_EVENT_SPLICE;
} else {
ERR("Unknown output type %s. Possible values are: %s, %s\n",
opt_output, output_mmap, output_splice);
usage(stderr);
ret = CMD_ERROR;
goto error;
}
}
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Mi open channels element */
if (lttng_opt_mi) {
assert(writer);
ret = mi_lttng_channels_open(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Strip channel list (format: chan1,chan2,...) */
channel_name = strtok(opt_channels, ",");
while (channel_name != NULL) {
/* Copy channel name and normalize it */
strncpy(chan.name, channel_name, NAME_MAX);
chan.name[NAME_MAX - 1] = '\0';
DBG("Enabling channel %s", channel_name);
ret = lttng_enable_channel(handle, &chan);
if (ret < 0) {
success = 0;
switch (-ret) {
case LTTNG_ERR_KERN_CHAN_EXIST:
case LTTNG_ERR_UST_CHAN_EXIST:
case LTTNG_ERR_CHAN_EXIST:
WARN("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
warn = 1;
break;
default:
ERR("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
error = 1;
break;
}
} else {
MSG("%s channel %s enabled for session %s",
get_domain_str(dom.type), channel_name, session_name);
success = 1;
}
if (lttng_opt_mi) {
/* Mi print the channel element and leave it open */
ret = mi_lttng_channel(writer, &chan, 1);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Individual Success ? */
ret = mi_lttng_writer_write_element_bool(writer,
mi_lttng_element_command_success, success);
if (ret) {
ret = CMD_ERROR;
goto error;
}
/* Close channel element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
/* Next channel */
channel_name = strtok(NULL, ",");
}
if (lttng_opt_mi) {
/* Close channels element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto error;
}
}
ret = CMD_SUCCESS;
error:
/* If more important error happen bypass the warning */
if (!ret && warn) {
ret = CMD_WARNING;
}
/* If more important error happen bypass the warning */
if (!ret && error) {
ret = CMD_ERROR;
}
lttng_destroy_handle(handle);
return ret;
}
/*
* The 'list <options>' first level command
*/
int cmd_list(int argc, const char **argv)
{
int opt, ret = CMD_SUCCESS;
const char *session_name;
static poptContext pc;
struct lttng_domain domain;
struct lttng_domain *domains = NULL;
memset(&domain, 0, sizeof(domain));
if (argc < 1) {
usage(stderr);
ret = CMD_ERROR;
goto end;
}
pc = poptGetContext(NULL, argc, argv, long_options, 0);
poptReadDefaultConfig(pc, 0);
while ((opt = poptGetNextOpt(pc)) != -1) {
switch (opt) {
case OPT_HELP:
usage(stdout);
goto end;
case OPT_USERSPACE:
opt_userspace = 1;
break;
case OPT_LIST_OPTIONS:
list_cmd_options(stdout, long_options);
goto end;
default:
usage(stderr);
ret = CMD_UNDEFINED;
goto end;
}
}
/* Mi check */
if (lttng_opt_mi) {
writer = mi_lttng_writer_create(fileno(stdout), lttng_opt_mi);
if (!writer) {
ret = CMD_ERROR;
goto end;
}
/* Open command element */
ret = mi_lttng_writer_command_open(writer,
mi_lttng_element_command_list);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Open output element */
ret = mi_lttng_writer_open_element(writer,
mi_lttng_element_command_output);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Get session name (trailing argument) */
session_name = poptGetArg(pc);
DBG2("Session name: %s", session_name);
if (opt_kernel) {
domain.type = LTTNG_DOMAIN_KERNEL;
} else if (opt_userspace) {
DBG2("Listing userspace global domain");
domain.type = LTTNG_DOMAIN_UST;
} else if (opt_jul) {
DBG2("Listing JUL domain");
domain.type = LTTNG_DOMAIN_JUL;
} else if (opt_log4j) {
domain.type = LTTNG_DOMAIN_LOG4J;
} else if (opt_python) {
domain.type = LTTNG_DOMAIN_PYTHON;
}
if (!opt_kernel && opt_syscall) {
WARN("--syscall will only work with the Kernel domain (-k)");
ret = CMD_ERROR;
goto end;
}
if (opt_kernel || opt_userspace || opt_jul || opt_log4j || opt_python) {
handle = lttng_create_handle(session_name, &domain);
if (handle == NULL) {
ret = CMD_FATAL;
goto end;
}
}
if (session_name == NULL) {
if (!opt_kernel && !opt_userspace && !opt_jul && !opt_log4j
&& !opt_python) {
ret = list_sessions(NULL);
if (ret) {
goto end;
}
}
if (opt_kernel) {
if (opt_syscall) {
ret = list_syscalls();
if (ret) {
goto end;
}
} else {
ret = list_kernel_events();
if (ret) {
goto end;
}
}
}
if (opt_userspace) {
if (opt_fields) {
ret = list_ust_event_fields();
} else {
ret = list_ust_events();
}
if (ret) {
goto end;
}
}
if (opt_jul || opt_log4j || opt_python) {
ret = list_agent_events();
if (ret) {
goto end;
}
}
} else {
/* List session attributes */
if (lttng_opt_mi) {
/* Open element sessions
* Present for xml consistency */
ret = mi_lttng_sessions_open(writer);
if (ret) {
goto end;
}
}
/* MI: the ouptut of list_sessions is an unclosed session element */
ret = list_sessions(session_name);
if (ret) {
goto end;
}
/* Domain listing */
if (opt_domain) {
ret = list_domains(session_name);
goto end;
}
/* Channel listing */
if (opt_kernel || opt_userspace) {
if (lttng_opt_mi) {
/* Add of domains and domain element for xml
* consistency and validation
*/
ret = mi_lttng_domains_open(writer);
if (ret) {
goto end;
}
/* Open domain and leave it open for
* nested channels printing */
ret = mi_lttng_domain(writer, &domain, 1);
if (ret) {
goto end;
}
}
ret = list_tracker_pids();
if (ret) {
goto end;
}
ret = list_channels(opt_channel);
if (ret) {
goto end;
}
if (lttng_opt_mi) {
/* Close domain and domain element */
ret = mi_lttng_close_multi_element(writer, 2);
}
if (ret) {
goto end;
}
} else {
int i, nb_domain;
/* We want all domain(s) */
nb_domain = lttng_list_domains(session_name, &domains);
if (nb_domain < 0) {
ret = CMD_ERROR;
ERR("%s", lttng_strerror(nb_domain));
goto end;
}
if (lttng_opt_mi) {
ret = mi_lttng_domains_open(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
for (i = 0; i < nb_domain; i++) {
switch (domains[i].type) {
case LTTNG_DOMAIN_KERNEL:
MSG("=== Domain: Kernel ===\n");
break;
case LTTNG_DOMAIN_UST:
MSG("=== Domain: UST global ===\n");
MSG("Buffer type: %s\n",
domains[i].buf_type ==
LTTNG_BUFFER_PER_PID ? "per PID" : "per UID");
break;
case LTTNG_DOMAIN_JUL:
MSG("=== Domain: JUL (Java Util Logging) ===\n");
break;
case LTTNG_DOMAIN_LOG4J:
MSG("=== Domain: LOG4j (Logging for Java) ===\n");
break;
case LTTNG_DOMAIN_PYTHON:
MSG("=== Domain: Python (logging) ===\n");
break;
default:
MSG("=== Domain: Unimplemented ===\n");
break;
}
if (lttng_opt_mi) {
ret = mi_lttng_domain(writer, &domains[i], 1);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
/* Clean handle before creating a new one */
if (handle) {
lttng_destroy_handle(handle);
}
handle = lttng_create_handle(session_name, &domains[i]);
if (handle == NULL) {
ret = CMD_FATAL;
goto end;
}
if (domains[i].type == LTTNG_DOMAIN_JUL ||
domains[i].type == LTTNG_DOMAIN_LOG4J ||
domains[i].type == LTTNG_DOMAIN_PYTHON) {
ret = list_session_agent_events();
if (ret) {
goto end;
}
continue;
}
switch (domains[i].type) {
case LTTNG_DOMAIN_KERNEL:
case LTTNG_DOMAIN_UST:
ret = list_tracker_pids();
if (ret) {
goto end;
}
break;
default:
break;
}
ret = list_channels(opt_channel);
if (ret) {
goto end;
}
if (lttng_opt_mi) {
/* Close domain element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
}
if (lttng_opt_mi) {
/* Close the domains, session and sessions element */
ret = mi_lttng_close_multi_element(writer, 3);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
}
}
/* Mi closing */
if (lttng_opt_mi) {
/* Close output element */
ret = mi_lttng_writer_close_element(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
/* Command element close */
ret = mi_lttng_writer_command_close(writer);
if (ret) {
ret = CMD_ERROR;
goto end;
}
}
end:
/* Mi clean-up */
if (writer && mi_lttng_writer_destroy(writer)) {
/* Preserve original error code */
ret = ret ? ret : -LTTNG_ERR_MI_IO_FAIL;
}
free(domains);
if (handle) {
lttng_destroy_handle(handle);
}
poptFreeContext(pc);
return ret;
}
/*
* Adding channel using the lttng API.
*/
static int enable_channel(char *session_name)
{
int ret = CMD_SUCCESS, warn = 0;
char *channel_name;
struct lttng_domain dom;
memset(&dom, 0, sizeof(dom));
/* Create lttng domain */
if (opt_kernel) {
dom.type = LTTNG_DOMAIN_KERNEL;
dom.buf_type = LTTNG_BUFFER_GLOBAL;
if (opt_buffer_uid || opt_buffer_pid) {
ERR("Buffer type not supported for domain -k");
ret = CMD_ERROR;
goto error;
}
} else if (opt_userspace) {
dom.type = LTTNG_DOMAIN_UST;
if (opt_buffer_uid) {
dom.buf_type = LTTNG_BUFFER_PER_UID;
} else {
if (opt_buffer_global) {
ERR("Buffer type not supported for domain -u");
ret = CMD_ERROR;
goto error;
}
dom.buf_type = LTTNG_BUFFER_PER_PID;
}
} else {
ERR("Please specify a tracer (-k/--kernel or -u/--userspace)");
ret = CMD_ERROR;
goto error;
}
set_default_attr(&dom);
if (chan.attr.tracefile_size == 0 && chan.attr.tracefile_count) {
ERR("Missing option --tracefile-size. "
"A file count without a size won't do anything.");
ret = CMD_ERROR;
goto error;
}
if ((chan.attr.tracefile_size > 0) &&
(chan.attr.tracefile_size < chan.attr.subbuf_size)) {
WARN("Tracefile size rounded up from (%" PRIu64 ") to subbuffer size (%" PRIu64 ")",
chan.attr.tracefile_size, chan.attr.subbuf_size);
chan.attr.tracefile_size = chan.attr.subbuf_size;
}
/* Setting channel output */
if (opt_output) {
if (!strncmp(output_mmap, opt_output, strlen(output_mmap))) {
chan.attr.output = LTTNG_EVENT_MMAP;
} else if (!strncmp(output_splice, opt_output, strlen(output_splice))) {
chan.attr.output = LTTNG_EVENT_SPLICE;
} else {
ERR("Unknown output type %s. Possible values are: %s, %s\n",
opt_output, output_mmap, output_splice);
usage(stderr);
ret = CMD_ERROR;
goto error;
}
}
handle = lttng_create_handle(session_name, &dom);
if (handle == NULL) {
ret = -1;
goto error;
}
/* Strip channel list (format: chan1,chan2,...) */
channel_name = strtok(opt_channels, ",");
while (channel_name != NULL) {
/* Copy channel name and normalize it */
strncpy(chan.name, channel_name, NAME_MAX);
chan.name[NAME_MAX - 1] = '\0';
DBG("Enabling channel %s", channel_name);
ret = lttng_enable_channel(handle, &chan);
if (ret < 0) {
switch (-ret) {
case LTTNG_ERR_KERN_CHAN_EXIST:
case LTTNG_ERR_UST_CHAN_EXIST:
WARN("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
goto error;
default:
ERR("Channel %s: %s (session %s)", channel_name,
lttng_strerror(ret), session_name);
break;
}
warn = 1;
} else {
MSG("%s channel %s enabled for session %s",
opt_kernel ? "Kernel" : "UST", channel_name,
session_name);
}
/* Next event */
channel_name = strtok(NULL, ",");
}
ret = CMD_SUCCESS;
error:
if (warn) {
ret = CMD_WARNING;
}
lttng_destroy_handle(handle);
return ret;
}
static int list_agent_events(void)
{
int i, size, ret = CMD_SUCCESS;
struct lttng_domain domain;
struct lttng_handle *handle = NULL;
struct lttng_event *event_list = NULL;
pid_t cur_pid = 0;
char *cmdline = NULL;
const char *agent_domain_str;
memset(&domain, 0, sizeof(domain));
if (opt_jul) {
domain.type = LTTNG_DOMAIN_JUL;
} else if (opt_log4j) {
domain.type = LTTNG_DOMAIN_LOG4J;
} else if (opt_python) {
domain.type = LTTNG_DOMAIN_PYTHON;
} else {
ERR("Invalid agent domain selected.");
ret = CMD_ERROR;
goto error;
}
agent_domain_str = get_domain_str(domain.type);
DBG("Getting %s tracing events", agent_domain_str);
handle = lttng_create_handle(NULL, &domain);
if (handle == NULL) {
ret = CMD_ERROR;
goto end;
}
size = lttng_list_tracepoints(handle, &event_list);
if (size < 0) {
ERR("Unable to list %s events: %s", agent_domain_str,
lttng_strerror(size));
ret = CMD_ERROR;
goto end;
}
if (lttng_opt_mi) {
/* Mi print */
ret = mi_list_agent_ust_events(event_list, size, &domain);
if (ret) {
ret = CMD_ERROR;
goto error;
}
} else {
/* Pretty print */
MSG("%s events (Logger name):\n-------------------------",
agent_domain_str);
if (size == 0) {
MSG("None");
}
for (i = 0; i < size; i++) {
if (cur_pid != event_list[i].pid) {
cur_pid = event_list[i].pid;
cmdline = get_cmdline_by_pid(cur_pid);
if (cmdline == NULL) {
ret = CMD_ERROR;
goto error;
}
MSG("\nPID: %d - Name: %s", cur_pid, cmdline);
free(cmdline);
}
MSG("%s- %s", indent6, event_list[i].name);
}
MSG("");
}
error:
free(event_list);
end:
lttng_destroy_handle(handle);
return ret;
}