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

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  1 // SPDX-License-Identifier: GPL-2.0
  2 #include <errno.h>
  3 #include <signal.h>
  4 #include <stdbool.h>
  5 #include <linux/kernel.h>
  6 #ifdef HAVE_BACKTRACE_SUPPORT
  7 #include <execinfo.h>
  8 #endif
  9 
 10 #include "../../util/cache.h"
 11 #include "../../util/debug.h"
 12 #include "../../util/util.h"
 13 #include "../browser.h"
 14 #include "../helpline.h"
 15 #include "../ui.h"
 16 #include "../util.h"
 17 #include "../libslang.h"
 18 #include "../keysyms.h"
 19 #include "tui.h"
 20 
 21 static volatile int ui__need_resize;
 22 
 23 extern struct perf_error_ops perf_tui_eops;
 24 extern bool tui_helpline__set;
 25 
 26 extern void hist_browser__init_hpp(void);
 27 
 28 void ui__refresh_dimensions(bool force)
 29 {
 30         if (force || ui__need_resize) {
 31                 ui__need_resize = 0;
 32                 pthread_mutex_lock(&ui__lock);
 33                 SLtt_get_screen_size();
 34                 SLsmg_reinit_smg();
 35                 pthread_mutex_unlock(&ui__lock);
 36         }
 37 }
 38 
 39 static void ui__sigwinch(int sig __maybe_unused)
 40 {
 41         ui__need_resize = 1;
 42 }
 43 
 44 static void ui__setup_sigwinch(void)
 45 {
 46         static bool done;
 47 
 48         if (done)
 49                 return;
 50 
 51         done = true;
 52         pthread__unblock_sigwinch();
 53         signal(SIGWINCH, ui__sigwinch);
 54 }
 55 
 56 int ui__getch(int delay_secs)
 57 {
 58         struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
 59         fd_set read_set;
 60         int err, key;
 61 
 62         ui__setup_sigwinch();
 63 
 64         FD_ZERO(&read_set);
 65         FD_SET(0, &read_set);
 66 
 67         if (delay_secs) {
 68                 timeout.tv_sec = delay_secs;
 69                 timeout.tv_usec = 0;
 70         }
 71 
 72         err = select(1, &read_set, NULL, NULL, ptimeout);
 73 
 74         if (err == 0)
 75                 return K_TIMER;
 76 
 77         if (err == -1) {
 78                 if (errno == EINTR)
 79                         return K_RESIZE;
 80                 return K_ERROR;
 81         }
 82 
 83         key = SLang_getkey();
 84         if (key != K_ESC)
 85                 return key;
 86 
 87         FD_ZERO(&read_set);
 88         FD_SET(0, &read_set);
 89         timeout.tv_sec = 0;
 90         timeout.tv_usec = 20;
 91         err = select(1, &read_set, NULL, NULL, &timeout);
 92         if (err == 0)
 93                 return K_ESC;
 94 
 95         SLang_ungetkey(key);
 96         return SLkp_getkey();
 97 }
 98 
 99 #ifdef HAVE_BACKTRACE_SUPPORT
100 static void ui__signal_backtrace(int sig)
101 {
102         void *stackdump[32];
103         size_t size;
104 
105         ui__exit(false);
106         psignal(sig, "perf");
107 
108         printf("-------- backtrace --------\n");
109         size = backtrace(stackdump, ARRAY_SIZE(stackdump));
110         backtrace_symbols_fd(stackdump, size, STDOUT_FILENO);
111 
112         exit(0);
113 }
114 #else
115 # define ui__signal_backtrace  ui__signal
116 #endif
117 
118 static void ui__signal(int sig)
119 {
120         ui__exit(false);
121         psignal(sig, "perf");
122         exit(0);
123 }
124 
125 int ui__init(void)
126 {
127         int err;
128 
129         SLutf8_enable(-1);
130         SLtt_get_terminfo();
131         SLtt_get_screen_size();
132 
133         err = SLsmg_init_smg();
134         if (err < 0)
135                 goto out;
136         err = SLang_init_tty(-1, 0, 0);
137         if (err < 0)
138                 goto out;
139 
140         err = SLkp_init();
141         if (err < 0) {
142                 pr_err("TUI initialization failed.\n");
143                 goto out;
144         }
145 
146         SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
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         ui_helpline__init();
157         ui_browser__init();
158         tui_progress__init();
159 
160         hist_browser__init_hpp();
161 out:
162         return err;
163 }
164 
165 void ui__exit(bool wait_for_ok)
166 {
167         if (wait_for_ok && tui_helpline__set)
168                 ui__question_window("Fatal Error",
169                                     ui_helpline__last_msg,
170                                     "Press any key...", 0);
171 
172         SLtt_set_cursor_visibility(1);
173         SLsmg_refresh();
174         SLsmg_reset_smg();
175         SLang_reset_tty();
176 
177         perf_error__unregister(&perf_tui_eops);
178 }
179 

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