Mercurial > hg > octave-lyh
annotate src/sighandlers.cc @ 15573:63d024333bee stable
doc: Add seealso links between debug_on_XXX functions (bug #37576)
* error.cc (Fdebug_on_warning,Fdebug_on_error): Add seealso links between
debug_on_XXX functions.
* sighandlers.cc (Fdebug_on_interrupt): Add seealso links between debug_on_XXX
functions.
| author | Rik <rik@octave.org> |
|---|---|
| date | Wed, 31 Oct 2012 20:46:17 -0700 |
| parents | 1ecfba4427ff |
| children |
| rev | line source |
|---|---|
| 1 | 1 /* |
| 2 | |
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3 Copyright (C) 1993-2012 John W. Eaton |
| 1 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 1 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 1 | 20 |
| 21 */ | |
| 22 | |
| 240 | 23 #ifdef HAVE_CONFIG_H |
| 1230 | 24 #include <config.h> |
| 1 | 25 #endif |
| 26 | |
| 2536 | 27 #include <cstdlib> |
| 28 | |
| 3503 | 29 #include <iostream> |
| 1344 | 30 #include <new> |
| 31 | |
| 834 | 32 #include <sys/types.h> |
| 33 #include <unistd.h> | |
| 1343 | 34 |
| 3281 | 35 #include "cmd-edit.h" |
| 5453 | 36 #include "oct-syscalls.h" |
| 4153 | 37 #include "quit.h" |
|
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38 #include "singleton-cleanup.h" |
| 3281 | 39 |
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40 #include "debug.h" |
| 4185 | 41 #include "defun.h" |
| 1352 | 42 #include "error.h" |
| 10194 | 43 #include "input.h" |
| 1373 | 44 #include "load-save.h" |
| 4294 | 45 #include "oct-map.h" |
| 2091 | 46 #include "pager.h" |
| 4185 | 47 #include "pt-bp.h" |
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48 #include "pt-eval.h" |
| 1 | 49 #include "sighandlers.h" |
| 4787 | 50 #include "sysdep.h" |
| 1352 | 51 #include "syswait.h" |
| 2091 | 52 #include "toplev.h" |
| 1 | 53 #include "utils.h" |
| 5794 | 54 #include "variables.h" |
| 1 | 55 |
| 56 // Nonzero means we have already printed a message for this series of | |
| 57 // SIGPIPES. We assume that the writer will eventually give up. | |
| 58 int pipe_handler_error_count = 0; | |
| 59 | |
| 3018 | 60 // TRUE means we can be interrupted. |
| 61 bool can_interrupt = false; | |
| 1 | 62 |
| 4185 | 63 // TRUE means we should try to enter the debugger on SIGINT. |
| 64 static bool Vdebug_on_interrupt = false; | |
| 65 | |
| 4449 | 66 // Allow users to avoid writing octave-core for SIGHUP (sent by |
| 67 // closing gnome-terminal, for example). Note that this variable has | |
| 68 // no effect if Vcrash_dumps_octave_core is FALSE. | |
| 5794 | 69 static bool Vsighup_dumps_octave_core = true; |
| 4449 | 70 |
| 71 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. | |
| 5794 | 72 static bool Vsigterm_dumps_octave_core = true; |
| 4449 | 73 |
| 5142 | 74 // List of signals we have caught since last call to octave_signal_handler. |
| 75 static bool octave_signals_caught[NSIG]; | |
| 76 | |
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77 // Signal handler return type. |
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78 #ifndef BADSIG |
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79 #define BADSIG (void (*)(int))-1 |
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80 #endif |
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81 |
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82 // The following is a workaround for an apparent bug in GCC 4.1.2 and |
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83 // possibly earlier versions. See Octave bug report #30685 for details. |
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84 #if defined (__GNUC__) |
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85 # if ! (__GNUC__ > 4 \ |
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86 || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \ |
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87 || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2)))) |
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88 # undef GNULIB_NAMESPACE |
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89 # define GNULIB_NAMESPACE |
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90 # warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC" |
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91 # endif |
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92 #endif |
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93 |
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94 #define BLOCK_SIGNAL(sig, nvar, ovar) \ |
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95 do \ |
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96 { \ |
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97 GNULIB_NAMESPACE::sigemptyset (&nvar); \ |
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98 GNULIB_NAMESPACE::sigaddset (&nvar, sig); \ |
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99 GNULIB_NAMESPACE::sigemptyset (&ovar); \ |
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100 GNULIB_NAMESPACE::sigprocmask (SIG_BLOCK, &nvar, &ovar); \ |
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101 } \ |
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102 while (0) |
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103 |
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104 #if !defined (SIGCHLD) && defined (SIGCLD) |
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105 #define SIGCHLD SIGCLD |
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106 #endif |
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107 |
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108 #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar) |
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109 #define UNBLOCK_CHILD(ovar) GNULIB_NAMESPACE::sigprocmask (SIG_SETMASK, &ovar, 0) |
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110 |
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111 // Called from octave_quit () to actually do something about the signals |
| 5142 | 112 // we have caught. |
| 113 | |
| 114 void | |
| 115 octave_signal_handler (void) | |
| 116 { | |
| 117 // The list of signals is relatively short, so we will just go | |
| 118 // linearly through the list. | |
| 119 | |
| 120 for (int i = 0; i < NSIG; i++) | |
| 121 { | |
| 122 if (octave_signals_caught[i]) | |
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123 { |
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124 octave_signals_caught[i] = false; |
| 5142 | 125 |
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126 switch (i) |
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127 { |
| 5451 | 128 #ifdef SIGCHLD |
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129 case SIGCHLD: |
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130 { |
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131 volatile octave_interrupt_handler saved_interrupt_handler |
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132 = octave_ignore_interrupts (); |
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133 |
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134 sigset_t set, oset; |
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135 |
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136 BLOCK_CHILD (set, oset); |
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137 |
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138 octave_child_list::wait (); |
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139 |
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140 octave_set_interrupt_handler (saved_interrupt_handler); |
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141 |
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142 UNBLOCK_CHILD (oset); |
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143 |
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144 octave_child_list::reap (); |
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145 } |
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146 break; |
| 5451 | 147 #endif |
| 5142 | 148 |
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149 case SIGFPE: |
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150 std::cerr << "warning: floating point exception -- trying to return to prompt" << std::endl; |
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151 break; |
| 5142 | 152 |
| 5451 | 153 #ifdef SIGPIPE |
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154 case SIGPIPE: |
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155 std::cerr << "warning: broken pipe -- some output may be lost" << std::endl; |
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156 break; |
| 5451 | 157 #endif |
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158 } |
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159 } |
| 5142 | 160 } |
| 161 } | |
| 162 | |
| 1 | 163 static void |
| 4787 | 164 my_friendly_exit (const char *sig_name, int sig_number, |
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165 bool save_vars = true) |
| 1 | 166 { |
| 2536 | 167 static bool been_there_done_that = false; |
| 168 | |
| 169 if (been_there_done_that) | |
| 170 { | |
| 2554 | 171 #if defined (SIGABRT) |
| 2536 | 172 octave_set_signal_handler (SIGABRT, SIG_DFL); |
| 173 #endif | |
| 174 | |
| 3644 | 175 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
| 5451 | 176 |
| 177 MINGW_SIGNAL_CLEANUP (); | |
| 178 | |
| 2536 | 179 abort (); |
| 180 } | |
| 181 else | |
| 182 { | |
| 183 been_there_done_that = true; | |
| 1373 | 184 |
| 3644 | 185 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
| 2536 | 186 |
| 4787 | 187 if (save_vars) |
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188 dump_octave_core (); |
| 2536 | 189 |
| 3162 | 190 if (sig_number < 0) |
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191 { |
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192 MINGW_SIGNAL_CLEANUP (); |
| 5451 | 193 |
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194 exit (1); |
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195 } |
| 3162 | 196 else |
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197 { |
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198 octave_set_signal_handler (sig_number, SIG_DFL); |
| 3162 | 199 |
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200 GNULIB_NAMESPACE::raise (sig_number); |
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201 } |
| 2536 | 202 } |
| 1 | 203 } |
| 204 | |
| 1446 | 205 sig_handler * |
| 5770 | 206 octave_set_signal_handler (int sig, sig_handler *handler, |
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207 bool restart_syscalls) |
| 1446 | 208 { |
| 209 struct sigaction act, oact; | |
| 5144 | 210 |
| 1446 | 211 act.sa_handler = handler; |
| 212 act.sa_flags = 0; | |
| 5144 | 213 |
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214 #if defined (SIGALRM) |
| 5144 | 215 if (sig == SIGALRM) |
| 216 { | |
| 217 #if defined (SA_INTERRUPT) | |
| 218 act.sa_flags |= SA_INTERRUPT; | |
| 219 #endif | |
| 220 } | |
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221 #endif |
| 5144 | 222 #if defined (SA_RESTART) |
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223 #if defined (SIGALRM) |
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224 else |
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225 #endif |
| 5775 | 226 // FIXME -- Do we also need to explicitly disable SA_RESTART? |
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227 if (restart_syscalls) |
| 5770 | 228 act.sa_flags |= SA_RESTART; |
| 5144 | 229 #endif |
| 230 | |
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231 GNULIB_NAMESPACE::sigemptyset (&act.sa_mask); |
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232 GNULIB_NAMESPACE::sigemptyset (&oact.sa_mask); |
| 5144 | 233 |
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234 GNULIB_NAMESPACE::sigaction (sig, &act, &oact); |
| 5144 | 235 |
| 1446 | 236 return oact.sa_handler; |
| 237 } | |
| 238 | |
| 10246 | 239 static void |
| 1446 | 240 generic_sig_handler (int sig) |
| 1 | 241 { |
| 5844 | 242 my_friendly_exit (strsignal (sig), sig); |
| 1 | 243 } |
| 244 | |
| 2091 | 245 // Handle SIGCHLD. |
| 1230 | 246 |
| 4064 | 247 #ifdef SIGCHLD |
| 10246 | 248 static void |
| 2092 | 249 sigchld_handler (int /* sig */) |
| 1230 | 250 { |
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251 octave_signal_caught = 1; |
| 2626 | 252 |
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253 octave_signals_caught[SIGCHLD] = true; |
| 1230 | 254 } |
| 4064 | 255 #endif /* defined(SIGCHLD) */ |
| 1230 | 256 |
| 4064 | 257 #ifdef SIGFPE |
| 1373 | 258 #if defined (__alpha__) |
| 10246 | 259 static void |
| 1488 | 260 sigfpe_handler (int /* sig */) |
| 1373 | 261 { |
| 5142 | 262 if (can_interrupt && octave_interrupt_state >= 0) |
| 263 { | |
| 264 octave_signal_caught = 1; | |
| 1373 | 265 |
| 5142 | 266 octave_signals_caught[SIGFPE] = true; |
| 4182 | 267 |
| 5142 | 268 octave_interrupt_state++; |
| 269 } | |
| 1373 | 270 } |
| 4064 | 271 #endif /* defined(__alpha__) */ |
| 272 #endif /* defined(SIGFPE) */ | |
| 1373 | 273 |
| 4449 | 274 #if defined (SIGHUP) || defined (SIGTERM) |
| 10246 | 275 static void |
| 4449 | 276 sig_hup_or_term_handler (int sig) |
| 277 { | |
| 278 switch (sig) | |
| 279 { | |
| 280 #if defined (SIGHUP) | |
| 281 case SIGHUP: | |
| 282 { | |
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283 if (Vsighup_dumps_octave_core) |
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284 dump_octave_core (); |
| 4449 | 285 } |
| 286 break; | |
| 287 #endif | |
| 288 | |
| 289 #if defined (SIGTERM) | |
| 290 case SIGTERM: | |
| 291 { | |
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292 if (Vsigterm_dumps_octave_core) |
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293 dump_octave_core (); |
| 4449 | 294 } |
| 295 break; | |
| 296 #endif | |
| 297 | |
| 298 default: | |
| 299 break; | |
| 300 } | |
| 301 | |
| 302 clean_up_and_exit (0); | |
| 303 } | |
| 304 #endif | |
| 305 | |
| 3343 | 306 #if 0 |
| 3281 | 307 #if defined (SIGWINCH) |
| 10246 | 308 static void |
| 3281 | 309 sigwinch_handler (int /* sig */) |
| 310 { | |
| 311 command_editor::resize_terminal (); | |
| 312 } | |
| 313 #endif | |
| 3343 | 314 #endif |
| 3281 | 315 |
| 635 | 316 // Handle SIGINT by restarting the parser (see octave.cc). |
| 2554 | 317 // |
| 318 // This also has to work for SIGBREAK (on systems that have it), so we | |
| 319 // use the value of sig, instead of just assuming that it is called | |
| 320 // for SIGINT only. | |
| 635 | 321 |
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322 static void |
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323 user_abort (const char *sig_name, int sig_number) |
| 1 | 324 { |
| 4172 | 325 if (! octave_initialized) |
| 326 exit (1); | |
| 327 | |
| 1 | 328 if (can_interrupt) |
| 329 { | |
| 4185 | 330 if (Vdebug_on_interrupt) |
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331 { |
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332 if (! octave_debug_on_interrupt_state) |
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333 { |
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334 tree_evaluator::debug_mode = true; |
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335 octave_debug_on_interrupt_state = true; |
| 4185 | 336 |
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337 return; |
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338 } |
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339 else |
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340 { |
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341 // Clear the flag and do normal interrupt stuff. |
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342 |
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343 tree_evaluator::debug_mode |
| 10194 | 344 = bp_table::have_breakpoints () || Vdebugging; |
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345 octave_debug_on_interrupt_state = false; |
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346 } |
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347 } |
| 4185 | 348 |
| 4153 | 349 if (octave_interrupt_immediately) |
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350 { |
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351 if (octave_interrupt_state == 0) |
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352 octave_interrupt_state = 1; |
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353 |
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354 octave_jump_to_enclosing_context (); |
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355 } |
| 4429 | 356 else |
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357 { |
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358 // If we are already cleaning up from a previous interrupt, |
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359 // take note of the fact that another interrupt signal has |
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360 // arrived. |
| 4793 | 361 |
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362 if (octave_interrupt_state < 0) |
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363 octave_interrupt_state = 0; |
| 4793 | 364 |
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365 octave_signal_caught = 1; |
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366 octave_interrupt_state++; |
| 4787 | 367 |
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368 if (interactive && octave_interrupt_state == 2) |
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369 std::cerr << "Press Control-C again to abort." << std::endl; |
| 4787 | 370 |
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371 if (octave_interrupt_state >= 3) |
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372 my_friendly_exit (sig_name, sig_number, true); |
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373 } |
| 1 | 374 } |
| 375 | |
| 5451 | 376 } |
| 377 | |
| 10246 | 378 static void |
| 5451 | 379 sigint_handler (int sig) |
| 380 { | |
| 381 #ifdef USE_W32_SIGINT | |
| 382 if (w32_in_main_thread ()) | |
| 5844 | 383 user_abort (strsignal (sig), sig); |
| 5451 | 384 else |
| 385 w32_raise (sig); | |
| 386 #else | |
| 5844 | 387 user_abort (strsignal (sig), sig); |
| 5451 | 388 #endif |
| 1 | 389 } |
| 390 | |
| 4064 | 391 #ifdef SIGPIPE |
| 10246 | 392 static void |
| 1488 | 393 sigpipe_handler (int /* sig */) |
| 1 | 394 { |
| 5142 | 395 octave_signal_caught = 1; |
| 396 | |
| 397 octave_signals_caught[SIGPIPE] = true; | |
| 1 | 398 |
| 1358 | 399 // Don't loop forever on account of this. |
| 400 | |
| 5142 | 401 if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) |
| 4787 | 402 octave_interrupt_state++; |
| 1 | 403 } |
| 4064 | 404 #endif /* defined(SIGPIPE) */ |
| 1 | 405 |
| 5451 | 406 #ifdef USE_W32_SIGINT |
| 407 static BOOL CALLBACK | |
| 408 w32_sigint_handler (DWORD sig) | |
| 409 { | |
| 410 const char *sig_name; | |
| 411 | |
| 412 switch(sig) | |
| 413 { | |
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414 case CTRL_BREAK_EVENT: |
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415 sig_name = "Ctrl-Break"; |
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416 break; |
| 5451 | 417 case CTRL_C_EVENT: |
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418 sig_name = "Ctrl-C"; |
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419 break; |
| 5451 | 420 case CTRL_CLOSE_EVENT: |
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421 sig_name = "close console"; |
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422 break; |
| 5451 | 423 case CTRL_LOGOFF_EVENT: |
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424 sig_name = "logoff"; |
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425 break; |
| 5451 | 426 case CTRL_SHUTDOWN_EVENT: |
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427 sig_name = "shutdown"; |
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428 break; |
| 5451 | 429 default: |
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430 sig_name = "unknown console event"; |
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431 break; |
| 5451 | 432 } |
| 433 | |
| 434 switch(sig) | |
| 435 { | |
| 436 case CTRL_BREAK_EVENT: | |
| 437 case CTRL_C_EVENT: | |
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438 w32_raise (SIGINT); |
| 5451 | 439 break; |
| 440 | |
| 441 case CTRL_CLOSE_EVENT: | |
| 442 case CTRL_LOGOFF_EVENT: | |
| 443 case CTRL_SHUTDOWN_EVENT: | |
| 444 default: | |
| 445 // We should do the following: | |
| 446 // clean_up_and_exit (0); | |
| 447 // We can't because we aren't running in the normal Octave thread. | |
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448 user_abort(sig_name, sig); |
| 5451 | 449 break; |
| 450 } | |
| 451 | |
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452 // Return TRUE if the event was handled, or FALSE if another handler |
| 5451 | 453 // should be called. |
| 5775 | 454 // FIXME check that windows terminates the thread. |
| 5451 | 455 return TRUE; |
| 456 } | |
| 457 #endif /* w32_sigint_handler */ | |
| 458 | |
| 459 | |
| 2705 | 460 octave_interrupt_handler |
| 2554 | 461 octave_catch_interrupts (void) |
| 462 { | |
| 2705 | 463 octave_interrupt_handler retval; |
| 2554 | 464 |
| 465 #ifdef SIGINT | |
| 2705 | 466 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
| 2554 | 467 #endif |
| 468 | |
| 469 #ifdef SIGBREAK | |
| 2705 | 470 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
| 2554 | 471 #endif |
| 2705 | 472 |
| 5451 | 473 #ifdef USE_W32_SIGINT |
| 474 | |
| 475 // Intercept windows console control events. | |
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476 // Note that the windows console signal handlers chain, so if |
| 5451 | 477 // install_signal_handlers is called more than once in the same program, |
| 478 // then first call the following to avoid duplicates: | |
| 479 // | |
| 480 // SetConsoleCtrlHandler (w32_sigint_handler, FALSE); | |
| 481 | |
| 482 if (! SetConsoleCtrlHandler (w32_sigint_handler, TRUE)) | |
| 483 error ("SetConsoleCtrlHandler failed with %ld\n", GetLastError ()); | |
| 484 | |
| 485 w32_set_quiet_shutdown (); | |
| 486 | |
| 487 #endif | |
| 488 | |
| 2705 | 489 return retval; |
| 2554 | 490 } |
| 491 | |
| 2705 | 492 octave_interrupt_handler |
| 493 octave_ignore_interrupts (void) | |
| 2554 | 494 { |
| 2705 | 495 octave_interrupt_handler retval; |
| 496 | |
| 2554 | 497 #ifdef SIGINT |
| 2705 | 498 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
| 2554 | 499 #endif |
| 500 | |
| 501 #ifdef SIGBREAK | |
| 2705 | 502 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
| 2554 | 503 #endif |
| 2705 | 504 |
| 505 return retval; | |
| 506 } | |
| 507 | |
| 508 octave_interrupt_handler | |
| 5770 | 509 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h, |
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510 bool restart_syscalls) |
| 2705 | 511 { |
| 512 octave_interrupt_handler retval; | |
| 513 | |
| 514 #ifdef SIGINT | |
| 5770 | 515 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler, |
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516 restart_syscalls); |
| 2705 | 517 #endif |
| 518 | |
| 519 #ifdef SIGBREAK | |
| 5770 | 520 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler, |
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521 restart_syscalls); |
| 2705 | 522 #endif |
| 523 | |
| 524 return retval; | |
| 1651 | 525 } |
| 526 | |
| 635 | 527 // Install all the handlers for the signals we might care about. |
| 528 | |
| 1 | 529 void |
| 530 install_signal_handlers (void) | |
| 531 { | |
| 5142 | 532 for (int i = 0; i < NSIG; i++) |
| 533 octave_signals_caught[i] = false; | |
| 534 | |
| 2554 | 535 octave_catch_interrupts (); |
| 536 | |
| 1 | 537 #ifdef SIGABRT |
| 1446 | 538 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
| 1 | 539 #endif |
| 540 | |
| 541 #ifdef SIGALRM | |
| 1446 | 542 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
| 1 | 543 #endif |
| 544 | |
| 545 #ifdef SIGBUS | |
| 1446 | 546 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
| 1 | 547 #endif |
| 548 | |
| 1230 | 549 #ifdef SIGCHLD |
| 1446 | 550 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
| 1230 | 551 #endif |
| 552 | |
| 3174 | 553 // SIGCLD |
| 554 // SIGCONT | |
| 555 | |
| 1 | 556 #ifdef SIGEMT |
| 1446 | 557 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
| 1 | 558 #endif |
| 559 | |
| 560 #ifdef SIGFPE | |
| 1373 | 561 #if defined (__alpha__) |
| 1446 | 562 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
| 1373 | 563 #else |
| 1446 | 564 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
| 1 | 565 #endif |
| 1373 | 566 #endif |
| 1 | 567 |
| 568 #ifdef SIGHUP | |
| 4449 | 569 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
| 1 | 570 #endif |
| 571 | |
| 572 #ifdef SIGILL | |
| 1446 | 573 octave_set_signal_handler (SIGILL, generic_sig_handler); |
| 1 | 574 #endif |
| 575 | |
| 3174 | 576 // SIGINFO |
| 577 // SIGINT | |
| 578 | |
| 1 | 579 #ifdef SIGIOT |
| 1446 | 580 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
| 1 | 581 #endif |
| 582 | |
| 583 #ifdef SIGLOST | |
| 1446 | 584 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
| 1 | 585 #endif |
| 586 | |
| 587 #ifdef SIGPIPE | |
| 1446 | 588 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
| 1 | 589 #endif |
| 590 | |
| 591 #ifdef SIGPOLL | |
| 1446 | 592 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
| 1 | 593 #endif |
| 594 | |
| 5866 | 595 // SIGPROF |
| 3174 | 596 // SIGPWR |
| 597 | |
| 1 | 598 #ifdef SIGQUIT |
| 1446 | 599 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
| 1 | 600 #endif |
| 601 | |
| 602 #ifdef SIGSEGV | |
| 1446 | 603 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
| 1 | 604 #endif |
| 605 | |
| 3174 | 606 // SIGSTOP |
| 607 | |
| 1 | 608 #ifdef SIGSYS |
| 1446 | 609 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
| 1 | 610 #endif |
| 611 | |
| 612 #ifdef SIGTERM | |
| 4449 | 613 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
| 1 | 614 #endif |
| 615 | |
| 616 #ifdef SIGTRAP | |
| 1446 | 617 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
| 1 | 618 #endif |
| 619 | |
| 3174 | 620 // SIGTSTP |
| 621 // SIGTTIN | |
| 622 // SIGTTOU | |
| 623 // SIGURG | |
| 624 | |
| 1 | 625 #ifdef SIGUSR1 |
| 1446 | 626 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
| 1 | 627 #endif |
| 628 | |
| 629 #ifdef SIGUSR2 | |
| 1446 | 630 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
| 1 | 631 #endif |
| 632 | |
| 633 #ifdef SIGVTALRM | |
| 1446 | 634 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
| 1 | 635 #endif |
| 636 | |
| 895 | 637 #ifdef SIGIO |
| 1446 | 638 octave_set_signal_handler (SIGIO, SIG_IGN); |
| 895 | 639 #endif |
| 640 | |
| 3343 | 641 #if 0 |
| 3281 | 642 #ifdef SIGWINCH |
| 643 octave_set_signal_handler (SIGWINCH, sigwinch_handler); | |
| 644 #endif | |
| 3343 | 645 #endif |
| 3174 | 646 |
| 1 | 647 #ifdef SIGXCPU |
| 1446 | 648 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
| 1 | 649 #endif |
| 650 | |
| 651 #ifdef SIGXFSZ | |
| 1446 | 652 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
| 1 | 653 #endif |
| 5451 | 654 |
| 1 | 655 } |
| 656 | |
|
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657 static octave_scalar_map |
| 4294 | 658 make_sig_struct (void) |
| 659 { | |
|
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660 octave_scalar_map m; |
| 4294 | 661 |
| 662 #ifdef SIGABRT | |
| 4675 | 663 m.assign ("ABRT", SIGABRT); |
| 4294 | 664 #endif |
| 665 | |
| 666 #ifdef SIGALRM | |
| 4675 | 667 m.assign ("ALRM", SIGALRM); |
| 4294 | 668 #endif |
| 669 | |
| 670 #ifdef SIGBUS | |
| 4675 | 671 m.assign ("BUS", SIGBUS); |
| 4294 | 672 #endif |
| 673 | |
| 674 #ifdef SIGCHLD | |
| 4675 | 675 m.assign ("CHLD", SIGCHLD); |
| 4294 | 676 #endif |
| 677 | |
| 678 #ifdef SIGCLD | |
| 4675 | 679 m.assign ("CLD", SIGCLD); |
| 4294 | 680 #endif |
| 681 | |
| 682 #ifdef SIGCONT | |
| 4675 | 683 m.assign ("CONT", SIGCONT); |
| 4294 | 684 #endif |
| 685 | |
| 686 #ifdef SIGEMT | |
| 4675 | 687 m.assign ("EMT", SIGEMT); |
| 4294 | 688 #endif |
| 689 | |
| 690 #ifdef SIGFPE | |
| 4675 | 691 m.assign ("FPE", SIGFPE); |
| 4294 | 692 #endif |
| 693 | |
| 694 #ifdef SIGHUP | |
| 4675 | 695 m.assign ("HUP", SIGHUP); |
| 4294 | 696 #endif |
| 697 | |
| 698 #ifdef SIGILL | |
| 4675 | 699 m.assign ("ILL", SIGILL); |
| 4294 | 700 #endif |
| 701 | |
| 702 #ifdef SIGINFO | |
| 4675 | 703 m.assign ("INFO", SIGINFO); |
| 4294 | 704 #endif |
| 705 | |
| 706 #ifdef SIGINT | |
| 4675 | 707 m.assign ("INT", SIGINT); |
| 4294 | 708 #endif |
| 709 | |
| 710 #ifdef SIGIOT | |
| 4675 | 711 m.assign ("IOT", SIGIOT); |
| 4294 | 712 #endif |
| 713 | |
| 714 #ifdef SIGLOST | |
| 4675 | 715 m.assign ("LOST", SIGLOST); |
| 4294 | 716 #endif |
| 717 | |
| 718 #ifdef SIGPIPE | |
| 4675 | 719 m.assign ("PIPE", SIGPIPE); |
| 4294 | 720 #endif |
| 721 | |
| 722 #ifdef SIGPOLL | |
| 4675 | 723 m.assign ("POLL", SIGPOLL); |
| 4294 | 724 #endif |
| 725 | |
| 726 #ifdef SIGPROF | |
| 4675 | 727 m.assign ("PROF", SIGPROF); |
| 4294 | 728 #endif |
| 729 | |
| 730 #ifdef SIGPWR | |
| 4675 | 731 m.assign ("PWR", SIGPWR); |
| 4294 | 732 #endif |
| 733 | |
| 734 #ifdef SIGQUIT | |
| 4675 | 735 m.assign ("QUIT", SIGQUIT); |
| 4294 | 736 #endif |
| 737 | |
| 738 #ifdef SIGSEGV | |
| 4675 | 739 m.assign ("SEGV", SIGSEGV); |
| 4294 | 740 #endif |
| 741 | |
| 742 #ifdef SIGSTOP | |
| 4675 | 743 m.assign ("STOP", SIGSTOP); |
| 4294 | 744 #endif |
| 745 | |
| 746 #ifdef SIGSYS | |
| 4675 | 747 m.assign ("SYS", SIGSYS); |
| 4294 | 748 #endif |
| 749 | |
| 750 #ifdef SIGTERM | |
| 4675 | 751 m.assign ("TERM", SIGTERM); |
| 4294 | 752 #endif |
| 753 | |
| 754 #ifdef SIGTRAP | |
| 4675 | 755 m.assign ("TRAP", SIGTRAP); |
| 4294 | 756 #endif |
| 757 | |
| 758 #ifdef SIGTSTP | |
| 4675 | 759 m.assign ("TSTP", SIGTSTP); |
| 4294 | 760 #endif |
| 761 | |
| 762 #ifdef SIGTTIN | |
| 4675 | 763 m.assign ("TTIN", SIGTTIN); |
| 4294 | 764 #endif |
| 765 | |
| 766 #ifdef SIGTTOU | |
| 4675 | 767 m.assign ("TTOU", SIGTTOU); |
| 4294 | 768 #endif |
| 769 | |
| 770 #ifdef SIGURG | |
| 4675 | 771 m.assign ("URG", SIGURG); |
| 4294 | 772 #endif |
| 773 | |
| 774 #ifdef SIGUSR1 | |
| 4675 | 775 m.assign ("USR1", SIGUSR1); |
| 4294 | 776 #endif |
| 777 | |
| 778 #ifdef SIGUSR2 | |
| 4675 | 779 m.assign ("USR2", SIGUSR2); |
| 4294 | 780 #endif |
| 781 | |
| 782 #ifdef SIGVTALRM | |
| 4675 | 783 m.assign ("VTALRM", SIGVTALRM); |
| 4294 | 784 #endif |
| 785 | |
| 786 #ifdef SIGIO | |
| 4675 | 787 m.assign ("IO", SIGIO); |
| 4294 | 788 #endif |
| 789 | |
| 790 #ifdef SIGWINCH | |
| 4675 | 791 m.assign ("WINCH", SIGWINCH); |
| 4294 | 792 #endif |
| 793 | |
| 794 #ifdef SIGXCPU | |
| 4675 | 795 m.assign ("XCPU", SIGXCPU); |
| 4294 | 796 #endif |
| 797 | |
| 798 #ifdef SIGXFSZ | |
| 4675 | 799 m.assign ("XFSZ", SIGXFSZ); |
| 4294 | 800 #endif |
| 801 | |
| 802 return m; | |
| 803 } | |
| 804 | |
| 5142 | 805 octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; |
| 5128 | 806 |
| 2926 | 807 bool |
| 808 octave_child_list::instance_ok (void) | |
| 809 { | |
| 810 bool retval = true; | |
| 811 | |
| 812 if (! instance) | |
|
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813 { |
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814 instance = new octave_child_list_rep (); |
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815 |
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816 if (instance) |
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817 singleton_cleanup_list::add (cleanup_instance); |
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818 } |
| 2926 | 819 |
| 820 if (! instance) | |
| 821 { | |
| 822 ::error ("unable to create child list object!"); | |
| 823 | |
| 824 retval = false; | |
| 825 } | |
| 826 | |
| 827 return retval; | |
| 828 } | |
| 829 | |
| 830 void | |
| 5142 | 831 octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) |
| 832 { | |
| 833 if (instance_ok ()) | |
| 834 instance->insert (pid, f); | |
| 835 } | |
| 836 | |
| 837 void | |
| 838 octave_child_list::reap (void) | |
| 2926 | 839 { |
| 840 if (instance_ok ()) | |
| 5142 | 841 instance->reap (); |
| 842 } | |
| 843 | |
| 844 bool | |
| 845 octave_child_list::wait (void) | |
| 846 { | |
| 847 return (instance_ok ()) ? instance->wait () : false; | |
| 2926 | 848 } |
| 849 | |
| 5142 | 850 class pid_equal |
| 851 { | |
| 852 public: | |
| 853 | |
| 854 pid_equal (pid_t v) : val (v) { } | |
| 855 | |
| 856 bool operator () (const octave_child& oc) const { return oc.pid == val; } | |
| 857 | |
| 858 private: | |
| 859 | |
| 860 pid_t val; | |
| 861 }; | |
| 862 | |
| 2926 | 863 void |
| 864 octave_child_list::remove (pid_t pid) | |
| 865 { | |
| 866 if (instance_ok ()) | |
| 5142 | 867 instance->remove_if (pid_equal (pid)); |
| 2926 | 868 } |
| 869 | |
| 5142 | 870 #define OCL_REP octave_child_list::octave_child_list_rep |
| 2926 | 871 |
| 5142 | 872 void |
| 873 OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) | |
| 2926 | 874 { |
| 5142 | 875 append (octave_child (pid, f)); |
| 2926 | 876 } |
| 877 | |
| 2209 | 878 void |
| 5142 | 879 OCL_REP::reap (void) |
| 2209 | 880 { |
| 5142 | 881 // Mark the record for PID invalid. |
| 2209 | 882 |
| 5142 | 883 for (iterator p = begin (); p != end (); p++) |
| 884 { | |
| 885 // The call to the octave_child::child_event_handler might | |
| 886 // invalidate the iterator (for example, by calling | |
| 887 // octave_child_list::remove), so we increment the iterator | |
| 888 // here. | |
| 2209 | 889 |
| 5142 | 890 octave_child& oc = *p; |
| 2209 | 891 |
| 5142 | 892 if (oc.have_status) |
|
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893 { |
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894 oc.have_status = 0; |
| 5142 | 895 |
|
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896 octave_child::child_event_handler f = oc.handler; |
| 5142 | 897 |
|
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898 if (f && f (oc.pid, oc.status)) |
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899 oc.pid = -1; |
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900 } |
| 2209 | 901 } |
| 902 | |
| 5142 | 903 remove_if (pid_equal (-1)); |
| 2209 | 904 } |
| 905 | |
| 5142 | 906 // Wait on our children and record any changes in their status. |
| 907 | |
| 908 bool | |
| 909 OCL_REP::wait (void) | |
| 2210 | 910 { |
| 5142 | 911 bool retval = false; |
| 2210 | 912 |
| 5142 | 913 for (iterator p = begin (); p != end (); p++) |
| 2210 | 914 { |
| 5142 | 915 octave_child& oc = *p; |
| 916 | |
| 917 pid_t pid = oc.pid; | |
| 918 | |
| 919 if (pid > 0) | |
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920 { |
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921 int status; |
| 2210 | 922 |
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923 if (octave_syscalls::waitpid (pid, &status, WNOHANG) > 0) |
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924 { |
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925 oc.have_status = 1; |
| 5142 | 926 |
|
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927 oc.status = status; |
| 5142 | 928 |
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929 retval = true; |
| 5142 | 930 |
|
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931 break; |
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932 } |
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933 } |
| 2210 | 934 } |
| 935 | |
| 5142 | 936 return retval; |
| 2210 | 937 } |
| 938 | |
| 5780 | 939 DEFUN (SIG, args, , |
| 940 "-*- texinfo -*-\n\ | |
| 941 @deftypefn {Built-in Function} {} SIG ()\n\ | |
| 942 Return a structure containing Unix signal names and their defined values.\n\ | |
| 943 @end deftypefn") | |
| 944 { | |
| 945 octave_value retval; | |
| 946 | |
| 947 if (args.length () == 0) | |
| 948 { | |
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949 static octave_scalar_map m = make_sig_struct (); |
| 5780 | 950 |
| 951 retval = m; | |
| 952 } | |
| 953 else | |
| 5823 | 954 print_usage (); |
| 5780 | 955 |
| 956 return retval; | |
| 957 } | |
| 958 | |
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959 /* |
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960 %!error SIG (1); |
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961 %!assert (isstruct (SIG ())); |
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962 %!assert (! isempty (SIG ())); |
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963 */ |
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964 |
| 5794 | 965 DEFUN (debug_on_interrupt, args, nargout, |
| 966 "-*- texinfo -*-\n\ | |
| 10840 | 967 @deftypefn {Built-in Function} {@var{val} =} debug_on_interrupt ()\n\ |
| 5794 | 968 @deftypefnx {Built-in Function} {@var{old_val} =} debug_on_interrupt (@var{new_val})\n\ |
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969 @deftypefnx {Built-in Function} {} debug_on_interrupt (@var{new_val}, \"local\")\n\ |
| 5794 | 970 Query or set the internal variable that controls whether Octave will try\n\ |
| 971 to enter debugging mode when it receives an interrupt signal (typically\n\ | |
| 972 generated with @kbd{C-c}). If a second interrupt signal is received\n\ | |
| 973 before reaching the debugging mode, a normal interrupt will occur.\n\ | |
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974 \n\ |
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975 When called from inside a function with the \"local\" option, the variable is\n\ |
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976 changed locally for the function and any subroutines it calls. The original\n\ |
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977 variable value is restored when exiting the function.\n\ |
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978 @seealso{debug_on_error, debug_on_warning}\n\ |
| 5794 | 979 @end deftypefn") |
| 4449 | 980 { |
| 5794 | 981 return SET_INTERNAL_VARIABLE (debug_on_interrupt); |
| 4449 | 982 } |
| 983 | |
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984 /* |
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985 %!error (debug_on_interrupt (1, 2)); |
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986 %!test |
| 12832 | 987 %! orig_val = debug_on_interrupt (); |
| 988 %! old_val = debug_on_interrupt (! orig_val); | |
| 989 %! assert (orig_val, old_val); | |
| 990 %! assert (debug_on_interrupt (), ! orig_val); | |
| 991 %! debug_on_interrupt (orig_val); | |
| 992 %! assert (debug_on_interrupt (), orig_val); | |
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993 */ |
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994 |
| 5794 | 995 DEFUN (sighup_dumps_octave_core, args, nargout, |
| 996 "-*- texinfo -*-\n\ | |
| 10840 | 997 @deftypefn {Built-in Function} {@var{val} =} sighup_dumps_octave_core ()\n\ |
| 5794 | 998 @deftypefnx {Built-in Function} {@var{old_val} =} sighup_dumps_octave_core (@var{new_val})\n\ |
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999 @deftypefnx {Built-in Function} {} sighup_dumps_octave_core (@var{new_val}, \"local\")\n\ |
| 5794 | 1000 Query or set the internal variable that controls whether Octave tries\n\ |
| 6653 | 1001 to save all current variables to the file \"octave-core\" if it receives\n\ |
| 5794 | 1002 a hangup signal.\n\ |
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1003 \n\ |
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1004 When called from inside a function with the \"local\" option, the variable is\n\ |
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1005 changed locally for the function and any subroutines it calls. The original\n\ |
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1006 variable value is restored when exiting the function.\n\ |
| 5794 | 1007 @end deftypefn") |
| 4185 | 1008 { |
| 5794 | 1009 return SET_INTERNAL_VARIABLE (sighup_dumps_octave_core); |
| 1010 } | |
| 4294 | 1011 |
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1012 /* |
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1013 %!error (sighup_dumps_octave_core (1, 2)); |
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1014 %!test |
| 12832 | 1015 %! orig_val = sighup_dumps_octave_core (); |
| 1016 %! old_val = sighup_dumps_octave_core (! orig_val); | |
| 1017 %! assert (orig_val, old_val); | |
| 1018 %! assert (sighup_dumps_octave_core (), ! orig_val); | |
| 1019 %! sighup_dumps_octave_core (orig_val); | |
| 1020 %! assert (sighup_dumps_octave_core (), orig_val); | |
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1021 */ |
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1022 |
| 5794 | 1023 DEFUN (sigterm_dumps_octave_core, args, nargout, |
| 1024 "-*- texinfo -*-\n\ | |
| 10840 | 1025 @deftypefn {Built-in Function} {@var{val} =} sigterm_dumps_octave_core ()\n\ |
| 5794 | 1026 @deftypefnx {Built-in Function} {@var{old_val} =} sigterm_dumps_octave_core (@var{new_val})\n\ |
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1027 @deftypefnx {Built-in Function} {} sigterm_dumps_octave_core (@var{new_val}, \"local\")\n\ |
| 5794 | 1028 Query or set the internal variable that controls whether Octave tries\n\ |
| 6653 | 1029 to save all current variables to the file \"octave-core\" if it receives\n\ |
| 5794 | 1030 a terminate signal.\n\ |
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1031 \n\ |
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1032 When called from inside a function with the \"local\" option, the variable is\n\ |
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1033 changed locally for the function and any subroutines it calls. The original\n\ |
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1034 variable value is restored when exiting the function.\n\ |
| 5794 | 1035 @end deftypefn") |
| 1036 { | |
| 1037 return SET_INTERNAL_VARIABLE (sigterm_dumps_octave_core); | |
| 4185 | 1038 } |
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1039 |
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1040 /* |
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1041 %!error (sigterm_dumps_octave_core (1, 2)); |
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1042 %!test |
| 12832 | 1043 %! orig_val = sigterm_dumps_octave_core (); |
| 1044 %! old_val = sigterm_dumps_octave_core (! orig_val); | |
| 1045 %! assert (orig_val, old_val); | |
| 1046 %! assert (sigterm_dumps_octave_core (), ! orig_val); | |
| 1047 %! sigterm_dumps_octave_core (orig_val); | |
| 1048 %! assert (sigterm_dumps_octave_core (), orig_val); | |
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1049 */ |