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TOMOYO Linux Cross Reference
Linux/tools/perf/ui/tui/setup.c

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  1 #include <errno.h>
  2 #include <signal.h>
  3 #include <stdbool.h>
  4 #ifdef HAVE_BACKTRACE_SUPPORT
  5 #include <execinfo.h>
  6 #endif
  7 
  8 #include "../../util/cache.h"
  9 #include "../../util/debug.h"
 10 #include "../../util/util.h"
 11 #include "../browser.h"
 12 #include "../helpline.h"
 13 #include "../ui.h"
 14 #include "../util.h"
 15 #include "../libslang.h"
 16 #include "../keysyms.h"
 17 #include "tui.h"
 18 
 19 static volatile int ui__need_resize;
 20 
 21 extern struct perf_error_ops perf_tui_eops;
 22 extern bool tui_helpline__set;
 23 
 24 extern void hist_browser__init_hpp(void);
 25 
 26 void ui__refresh_dimensions(bool force)
 27 {
 28         if (force || ui__need_resize) {
 29                 ui__need_resize = 0;
 30                 pthread_mutex_lock(&ui__lock);
 31                 SLtt_get_screen_size();
 32                 SLsmg_reinit_smg();
 33                 pthread_mutex_unlock(&ui__lock);
 34         }
 35 }
 36 
 37 static void ui__sigwinch(int sig __maybe_unused)
 38 {
 39         ui__need_resize = 1;
 40 }
 41 
 42 static void ui__setup_sigwinch(void)
 43 {
 44         static bool done;
 45 
 46         if (done)
 47                 return;
 48 
 49         done = true;
 50         pthread__unblock_sigwinch();
 51         signal(SIGWINCH, ui__sigwinch);
 52 }
 53 
 54 int ui__getch(int delay_secs)
 55 {
 56         struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
 57         fd_set read_set;
 58         int err, key;
 59 
 60         ui__setup_sigwinch();
 61 
 62         FD_ZERO(&read_set);
 63         FD_SET(0, &read_set);
 64 
 65         if (delay_secs) {
 66                 timeout.tv_sec = delay_secs;
 67                 timeout.tv_usec = 0;
 68         }
 69 
 70         err = select(1, &read_set, NULL, NULL, ptimeout);
 71 
 72         if (err == 0)
 73                 return K_TIMER;
 74 
 75         if (err == -1) {
 76                 if (errno == EINTR)
 77                         return K_RESIZE;
 78                 return K_ERROR;
 79         }
 80 
 81         key = SLang_getkey();
 82         if (key != K_ESC)
 83                 return key;
 84 
 85         FD_ZERO(&read_set);
 86         FD_SET(0, &read_set);
 87         timeout.tv_sec = 0;
 88         timeout.tv_usec = 20;
 89         err = select(1, &read_set, NULL, NULL, &timeout);
 90         if (err == 0)
 91                 return K_ESC;
 92 
 93         SLang_ungetkey(key);
 94         return SLkp_getkey();
 95 }
 96 
 97 #ifdef HAVE_BACKTRACE_SUPPORT
 98 static void ui__signal_backtrace(int sig)
 99 {
100         void *stackdump[32];
101         size_t size;
102 
103         ui__exit(false);
104         psignal(sig, "perf");
105 
106         printf("-------- backtrace --------\n");
107         size = backtrace(stackdump, ARRAY_SIZE(stackdump));
108         backtrace_symbols_fd(stackdump, size, STDOUT_FILENO);
109 
110         exit(0);
111 }
112 #else
113 # define ui__signal_backtrace  ui__signal
114 #endif
115 
116 static void ui__signal(int sig)
117 {
118         ui__exit(false);
119         psignal(sig, "perf");
120         exit(0);
121 }
122 
123 int ui__init(void)
124 {
125         int err;
126 
127         SLutf8_enable(-1);
128         SLtt_get_terminfo();
129         SLtt_get_screen_size();
130 
131         err = SLsmg_init_smg();
132         if (err < 0)
133                 goto out;
134         err = SLang_init_tty(-1, 0, 0);
135         if (err < 0)
136                 goto out;
137 
138         err = SLkp_init();
139         if (err < 0) {
140                 pr_err("TUI initialization failed.\n");
141                 goto out;
142         }
143 
144         SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
145 
146         signal(SIGSEGV, ui__signal_backtrace);
147         signal(SIGFPE, ui__signal_backtrace);
148         signal(SIGINT, ui__signal);
149         signal(SIGQUIT, ui__signal);
150         signal(SIGTERM, ui__signal);
151 
152         perf_error__register(&perf_tui_eops);
153 
154         ui_helpline__init();
155         ui_browser__init();
156         tui_progress__init();
157 
158         hist_browser__init_hpp();
159 out:
160         return err;
161 }
162 
163 void ui__exit(bool wait_for_ok)
164 {
165         if (wait_for_ok && tui_helpline__set)
166                 ui__question_window("Fatal Error",
167                                     ui_helpline__last_msg,
168                                     "Press any key...", 0);
169 
170         SLtt_set_cursor_visibility(1);
171         SLsmg_refresh();
172         SLsmg_reset_smg();
173         SLang_reset_tty();
174 
175         perf_error__unregister(&perf_tui_eops);
176 }
177 

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