void qmp_trace_event_set_state(const char *name, bool enable,
bool has_ignore_unavailable,
bool ignore_unavailable, Error **errp)
{
bool found = false;
TraceEvent *ev;
/* Check all selected events are dynamic */
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
found = true;
if (!(has_ignore_unavailable && ignore_unavailable) &&
!trace_event_get_state_static(ev)) {
error_setg(errp, "cannot set dynamic tracing state for \"%s\"",
trace_event_get_name(ev));
return;
}
}
if (!found && !trace_event_is_pattern(name)) {
error_setg(errp, "unknown event \"%s\"", name);
return;
}
/* Apply changes */
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
if (trace_event_get_state_static(ev)) {
trace_event_set_state_dynamic(ev, enable);
}
}
}
TraceEventInfoList *qmp_trace_event_get_state(const char *name, Error **errp)
{
TraceEventInfoList *events = NULL;
bool found = false;
TraceEvent *ev;
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
TraceEventInfoList *elem = g_new(TraceEventInfoList, 1);
elem->value = g_new(TraceEventInfo, 1);
elem->value->name = g_strdup(trace_event_get_name(ev));
if (!trace_event_get_state_static(ev)) {
elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE;
} else if (!trace_event_get_state_dynamic(ev)) {
elem->value->state = TRACE_EVENT_STATE_DISABLED;
} else {
elem->value->state = TRACE_EVENT_STATE_ENABLED;
}
elem->next = events;
events = elem;
found = true;
}
if (!found && !trace_event_is_pattern(name)) {
error_setg(errp, "unknown event \"%s\"", name);
}
return events;
}
void trace_list_events(void)
{
int i;
for (i = 0; i < trace_event_count(); i++) {
TraceEvent *res = trace_event_id(i);
fprintf(stderr, "%s\n", trace_event_get_name(res));
}
}
void trace_print_events(FILE *stream, fprintf_function stream_printf)
{
TraceEventID i;
for (i = 0; i < trace_event_count(); i++) {
TraceEvent *ev = trace_event_id(i);
stream_printf(stream, "%s [Event ID %u] : state %u\n",
trace_event_get_name(ev), i,
trace_event_get_state_static(ev) &&
trace_event_get_state_dynamic(ev));
}
}
TraceEvent *trace_event_name(const char *name)
{
assert(name != NULL);
TraceEventID i;
for (i = 0; i < trace_event_count(); i++) {
TraceEvent *ev = trace_event_id(i);
if (strcmp(trace_event_get_name(ev), name) == 0) {
return ev;
}
}
return NULL;
}
static int st_write_event_mapping(void)
{
uint64_t type = TRACE_RECORD_TYPE_MAPPING;
TraceEventIter iter;
TraceEvent *ev;
trace_event_iter_init(&iter, NULL);
while ((ev = trace_event_iter_next(&iter)) != NULL) {
uint64_t id = trace_event_get_id(ev);
const char *name = trace_event_get_name(ev);
uint32_t len = strlen(name);
if (fwrite(&type, sizeof(type), 1, trace_fp) != 1 ||
fwrite(&id, sizeof(id), 1, trace_fp) != 1 ||
fwrite(&len, sizeof(len), 1, trace_fp) != 1 ||
fwrite(name, len, 1, trace_fp) != 1) {
return -1;
}
}
return 0;
}
static bool check_events(bool has_vcpu, bool ignore_unavailable, bool is_pattern,
const char *name, Error **errp)
{
if (!is_pattern) {
TraceEvent *ev = trace_event_name(name);
/* error for non-existing event */
if (ev == NULL) {
error_setg(errp, "unknown event \"%s\"", name);
return false;
}
/* error for non-vcpu event */
if (has_vcpu && !trace_event_is_vcpu(ev)) {
error_setg(errp, "event \"%s\" is not vCPU-specific", name);
return false;
}
/* error for unavailable event */
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", name);
return false;
}
return true;
} else {
/* error for unavailable events */
TraceEventIter iter;
TraceEvent *ev;
trace_event_iter_init(&iter, name);
while ((ev = trace_event_iter_next(&iter)) != NULL) {
if (!ignore_unavailable && !trace_event_get_state_static(ev)) {
error_setg(errp, "event \"%s\" is disabled", trace_event_get_name(ev));
return false;
}
}
return true;
}
}
TraceEvent *trace_event_pattern(const char *pat, TraceEvent *ev)
{
assert(pat != NULL);
TraceEventID i;
if (ev == NULL) {
i = -1;
} else {
i = trace_event_get_id(ev);
}
i++;
while (i < trace_event_count()) {
TraceEvent *res = trace_event_id(i);
if (pattern_glob(pat, trace_event_get_name(res))) {
return res;
}
i++;
}
return NULL;
}
TraceEventInfoList *qmp_trace_event_get_state(const char *name,
bool has_vcpu, int64_t vcpu,
Error **errp)
{
Error *err = NULL;
TraceEventInfoList *events = NULL;
TraceEvent *ev;
bool is_pattern = trace_event_is_pattern(name);
CPUState *cpu;
/* Check provided vcpu */
cpu = get_cpu(has_vcpu, vcpu, &err);
if (err) {
error_propagate(errp, err);
return NULL;
}
/* Check events */
if (!check_events(has_vcpu, true, is_pattern, name, errp)) {
return NULL;
}
/* Get states (all errors checked above) */
ev = NULL;
while ((ev = trace_event_pattern(name, ev)) != NULL) {
TraceEventInfoList *elem;
bool is_vcpu = trace_event_is_vcpu(ev);
if (has_vcpu && !is_vcpu) {
continue;
}
elem = g_new(TraceEventInfoList, 1);
elem->value = g_new(TraceEventInfo, 1);
elem->value->vcpu = is_vcpu;
elem->value->name = g_strdup(trace_event_get_name(ev));
if (!trace_event_get_state_static(ev)) {
elem->value->state = TRACE_EVENT_STATE_UNAVAILABLE;
} else {
if (has_vcpu) {
if (is_vcpu) {
if (trace_event_get_vcpu_state_dynamic(cpu, ev)) {
elem->value->state = TRACE_EVENT_STATE_ENABLED;
} else {
elem->value->state = TRACE_EVENT_STATE_DISABLED;
}
}
/* else: already skipped above */
} else {
if (trace_event_get_state_dynamic(ev)) {
elem->value->state = TRACE_EVENT_STATE_ENABLED;
} else {
elem->value->state = TRACE_EVENT_STATE_DISABLED;
}
}
}
elem->next = events;
events = elem;
}
return events;
}
