tools/perf/ui/tui/setup.c

   1 #include <signal.h>
   2 #include <stdbool.h>
   3 #ifdef HAVE_BACKTRACE_SUPPORT
   4 #include <execinfo.h>
   5 #endif
   6
   7 #include "../../util/cache.h"
   8 #include "../../util/debug.h"
   9 #include "../browser.h"
  10 #include "../helpline.h"
  11 #include "../ui.h"
  12 #include "../util.h"
  13 #include "../libslang.h"
  14 #include "../keysyms.h"
  15 #include "tui.h"
  16
  17 static volatile int ui__need_resize;
  18
  19 extern struct perf_error_ops perf_tui_eops;
  20 extern bool tui_helpline__set;
  21
  22 extern void hist_browser__init_hpp(void);
  23
  24 void ui__refresh_dimensions(bool force)
  25 {
  26         if (force || ui__need_resize) {
  27                 ui__need_resize = 0;
  28                 pthread_mutex_lock(&ui__lock);
  29                 SLtt_get_screen_size();
  30                 SLsmg_reinit_smg();
  31                 pthread_mutex_unlock(&ui__lock);
  32         }
  33 }
  34
  35 static void ui__sigwinch(int sig __maybe_unused)
  36 {
  37         ui__need_resize = 1;
  38 }
  39
  40 static void ui__setup_sigwinch(void)
  41 {
  42         static bool done;
  43
  44         if (done)
  45                 return;
  46
  47         done = true;
  48         pthread__unblock_sigwinch();
  49         signal(SIGWINCH, ui__sigwinch);
  50 }
  51
  52 int ui__getch(int delay_secs)
  53 {
  54         struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
  55         fd_set read_set;
  56         int err, key;
  57
  58         ui__setup_sigwinch();
  59
  60         FD_ZERO(&read_set);
  61         FD_SET(0, &read_set);
  62
  63         if (delay_secs) {
  64                 timeout.tv_sec = delay_secs;
  65                 timeout.tv_usec = 0;
  66         }
  67
  68         err = select(1, &read_set, NULL, NULL, ptimeout);
  69
  70         if (err == 0)
  71                 return K_TIMER;
  72
  73         if (err == -1) {
  74                 if (errno == EINTR)
  75                         return K_RESIZE;
  76                 return K_ERROR;
  77         }
  78
  79         key = SLang_getkey();
  80         if (key != K_ESC)
  81                 return key;
  82
  83         FD_ZERO(&read_set);
  84         FD_SET(0, &read_set);
  85         timeout.tv_sec = 0;
  86         timeout.tv_usec = 20;
  87         err = select(1, &read_set, NULL, NULL, &timeout);
  88         if (err == 0)
  89                 return K_ESC;
  90
  91         SLang_ungetkey(key);
  92         return SLkp_getkey();
  93 }
  94
  95 #ifdef HAVE_BACKTRACE_SUPPORT
  96 static void ui__signal_backtrace(int sig)
  97 {
  98         void *stackdump[32];
  99         size_t size;
 100
 101         ui__exit(false);
 102         psignal(sig, "perf");
 103
 104         printf("-------- backtrace --------\n");
 105         size = backtrace(stackdump, ARRAY_SIZE(stackdump));
 106         backtrace_symbols_fd(stackdump, size, STDOUT_FILENO);
 107
 108         exit(0);
 109 }
 110 #else
 111 # define ui__signal_backtrace  ui__signal
 112 #endif
 113
 114 static void ui__signal(int sig)
 115 {
 116         ui__exit(false);
 117         psignal(sig, "perf");
 118         exit(0);
 119 }
 120
 121 int ui__init(void)
 122 {
 123         int err;
 124
 125         SLutf8_enable(-1);
 126         SLtt_get_terminfo();
 127         SLtt_get_screen_size();
 128
 129         err = SLsmg_init_smg();
 130         if (err < 0)
 131                 goto out;
 132         err = SLang_init_tty(0, 0, 0);
 133         if (err < 0)
 134                 goto out;
 135
 136         err = SLkp_init();
 137         if (err < 0) {
 138                 pr_err("TUI initialization failed.\n");
 139                 goto out;
 140         }
 141
 142         SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
 143
 144         ui_helpline__init();
 145         ui_browser__init();
 146         tui_progress__init();
 147
 148         signal(SIGSEGV, ui__signal_backtrace);
 149         signal(SIGFPE, ui__signal_backtrace);
 150         signal(SIGINT, ui__signal);
 151         signal(SIGQUIT, ui__signal);
 152         signal(SIGTERM, ui__signal);
 153
 154         perf_error__register(&perf_tui_eops);
 155
 156         hist_browser__init_hpp();
 157 out:
 158         return err;
 159 }
 160
 161 void ui__exit(bool wait_for_ok)
 162 {
 163         if (wait_for_ok && tui_helpline__set)
 164                 ui__question_window("Fatal Error",
 165                                     ui_helpline__last_msg,
 166                                     "Press any key...", 0);
 167
 168         SLtt_set_cursor_visibility(1);
 169         SLsmg_refresh();
 170         SLsmg_reset_smg();
 171         SLang_reset_tty();
 172
 173         perf_error__unregister(&perf_tui_eops);
 174 }