+static void prompt_integer(int *target, const char *msg)
+{
+ char *buf = malloc(0), *p;
+ size_t dummy = 0;
+ int tmp;
+
+ fprintf(stdout, "\n%s: ", msg);
+ if (getline(&buf, &dummy, stdin) < 0)
+ return;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+
+ p = buf;
+ while(*p) {
+ if (!isdigit(*p))
+ goto out_free;
+ p++;
+ }
+ tmp = strtoul(buf, NULL, 10);
+ *target = tmp;
+out_free:
+ free(buf);
+}
+
+static void prompt_percent(int *target, const char *msg)
+{
+ int tmp = 0;
+
+ prompt_integer(&tmp, msg);
+ if (tmp >= 0 && tmp <= 100)
+ *target = tmp;
+}
+
+static void prompt_symbol(struct sym_entry **target, const char *msg)
+{
+ char *buf = malloc(0), *p;
+ struct sym_entry *syme = *target, *n, *found = NULL;
+ size_t dummy = 0;
+
+ /* zero counters of active symbol */
+ if (syme) {
+ pthread_mutex_lock(&syme->source_lock);
+ __zero_source_counters(syme);
+ *target = NULL;
+ pthread_mutex_unlock(&syme->source_lock);
+ }
+
+ fprintf(stdout, "\n%s: ", msg);
+ if (getline(&buf, &dummy, stdin) < 0)
+ goto out_free;
+
+ p = strchr(buf, '\n');
+ if (p)
+ *p = 0;
+
+ pthread_mutex_lock(&active_symbols_lock);
+ syme = list_entry(active_symbols.next, struct sym_entry, node);
+ pthread_mutex_unlock(&active_symbols_lock);
+
+ list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
+ struct symbol *sym = (struct symbol *)(syme + 1);
+
+ if (!strcmp(buf, sym->name)) {
+ found = syme;
+ break;
+ }
+ }
+
+ if (!found) {
+ fprintf(stderr, "Sorry, %s is not active.\n", sym_filter);
+ sleep(1);
+ return;
+ } else
+ parse_source(found);
+
+out_free:
+ free(buf);
+}
+
+static void print_mapped_keys(void)
+{
+ char *name = NULL;
+
+ if (sym_filter_entry) {
+ struct symbol *sym = (struct symbol *)(sym_filter_entry+1);
+ name = sym->name;
+ }
+
+ fprintf(stdout, "\nMapped keys:\n");
+ fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs);
+ fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries);
+
+ if (nr_counters > 1)
+ fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter));
+
+ fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
+
+ if (vmlinux) {
+ fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
+ fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
+ fprintf(stdout, "\t[S] stop annotation.\n");
+ }
+
+ if (nr_counters > 1)
+ fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
+
+ fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
+ fprintf(stdout, "\t[qQ] quit.\n");
+}
+
+static int key_mapped(int c)
+{
+ switch (c) {
+ case 'd':
+ case 'e':
+ case 'f':
+ case 'z':
+ case 'q':
+ case 'Q':
+ return 1;
+ case 'E':
+ case 'w':
+ return nr_counters > 1 ? 1 : 0;
+ case 'F':
+ case 's':
+ case 'S':
+ return vmlinux ? 1 : 0;
+ }
+
+ return 0;
+}
+
+static void handle_keypress(int c)
+{
+ if (!key_mapped(c)) {
+ struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
+ struct termios tc, save;
+
+ print_mapped_keys();
+ fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
+ fflush(stdout);
+
+ tcgetattr(0, &save);
+ tc = save;
+ tc.c_lflag &= ~(ICANON | ECHO);
+ tc.c_cc[VMIN] = 0;
+ tc.c_cc[VTIME] = 0;
+ tcsetattr(0, TCSANOW, &tc);
+
+ poll(&stdin_poll, 1, -1);
+ c = getc(stdin);
+
+ tcsetattr(0, TCSAFLUSH, &save);
+ if (!key_mapped(c))
+ return;
+ }
+
+ switch (c) {
+ case 'd':
+ prompt_integer(&delay_secs, "Enter display delay");
+ break;
+ case 'e':
+ prompt_integer(&print_entries, "Enter display entries (lines)");
+ break;
+ case 'E':
+ if (nr_counters > 1) {
+ int i;
+
+ fprintf(stderr, "\nAvailable events:");
+ for (i = 0; i < nr_counters; i++)
+ fprintf(stderr, "\n\t%d %s", i, event_name(i));
+
+ prompt_integer(&sym_counter, "Enter details event counter");
+
+ if (sym_counter >= nr_counters) {
+ fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0));
+ sym_counter = 0;
+ sleep(1);
+ }
+ } else sym_counter = 0;
+ break;
+ case 'f':
+ prompt_integer(&count_filter, "Enter display event count filter");
+ break;
+ case 'F':
+ prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
+ break;
+ case 'q':
+ case 'Q':
+ printf("exiting.\n");
+ exit(0);
+ case 's':
+ prompt_symbol(&sym_filter_entry, "Enter details symbol");
+ break;
+ case 'S':
+ if (!sym_filter_entry)
+ break;
+ else {
+ struct sym_entry *syme = sym_filter_entry;
+
+ pthread_mutex_lock(&syme->source_lock);
+ sym_filter_entry = NULL;
+ __zero_source_counters(syme);
+ pthread_mutex_unlock(&syme->source_lock);
+ }
+ break;
+ case 'w':
+ display_weighted = ~display_weighted;
+ break;
+ case 'z':
+ zero = ~zero;
+ break;
+ }
+}
+