static void do_trace_enable_events(const char *line_buf)
{
const bool enable = ('-' != line_buf[0]);
const char *line_ptr = enable ? line_buf : line_buf + 1;
if (trace_event_is_pattern(line_ptr)) {
TraceEvent *ev = NULL;
while ((ev = trace_event_pattern(line_ptr, ev)) != NULL) {
if (trace_event_get_state_static(ev)) {
trace_event_set_state_dynamic(ev, enable);
}
}
} else {
TraceEvent *ev = trace_event_name(line_ptr);
if (ev == NULL) {
error_report("WARNING: trace event '%s' does not exist",
line_ptr);
} else if (!trace_event_get_state_static(ev)) {
error_report("WARNING: trace event '%s' is not traceable",
line_ptr);
} else {
trace_event_set_state_dynamic(ev, enable);
}
}
}
static void trace_init_events(const char *fname)
{
Location loc;
FILE *fp;
char line_buf[1024];
size_t line_idx = 0;
if (fname == NULL) {
return;
}
loc_push_none(&loc);
loc_set_file(fname, 0);
fp = fopen(fname, "r");
if (!fp) {
error_report("%s", strerror(errno));
exit(1);
}
while (fgets(line_buf, sizeof(line_buf), fp)) {
loc_set_file(fname, ++line_idx);
size_t len = strlen(line_buf);
if (len > 1) { /* skip empty lines */
line_buf[len - 1] = '\0';
if ('#' == line_buf[0]) { /* skip commented lines */
continue;
}
const bool enable = ('-' != line_buf[0]);
char *line_ptr = enable ? line_buf : line_buf + 1;
if (trace_event_is_pattern(line_ptr)) {
TraceEvent *ev = NULL;
while ((ev = trace_event_pattern(line_ptr, ev)) != NULL) {
if (trace_event_get_state_static(ev)) {
trace_event_set_state_dynamic(ev, enable);
}
}
} else {
TraceEvent *ev = trace_event_name(line_ptr);
if (ev == NULL) {
error_report("WARNING: trace event '%s' does not exist",
line_ptr);
} else if (!trace_event_get_state_static(ev)) {
error_report("WARNING: trace event '%s' is not traceable\n",
line_ptr);
} else {
trace_event_set_state_dynamic(ev, enable);
}
}
}
}
if (fclose(fp) != 0) {
loc_set_file(fname, 0);
error_report("%s", strerror(errno));
exit(1);
}
loc_pop(&loc);
}
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;
}
}
