Mercurial > octave
annotate libinterp/corefcn/sighandlers.cc @ 21192:a2ee71d42a06
* sighandlers.cc: Include siglist.h.
author | John W. Eaton <jwe@octave.org> |
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date | Thu, 04 Feb 2016 15:38:26 -0500 |
parents | 850e3d2533d4 |
children | fcac5dbbf9ed |
rev | line source |
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1 | 1 /* |
2 | |
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3 Copyright (C) 1993-2015 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" |
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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" |
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50 #include "siglist.h" |
4787 | 51 #include "sysdep.h" |
1352 | 52 #include "syswait.h" |
2091 | 53 #include "toplev.h" |
1 | 54 #include "utils.h" |
5794 | 55 #include "variables.h" |
1 | 56 |
57 // Nonzero means we have already printed a message for this series of | |
58 // SIGPIPES. We assume that the writer will eventually give up. | |
59 int pipe_handler_error_count = 0; | |
60 | |
3018 | 61 // TRUE means we can be interrupted. |
62 bool can_interrupt = false; | |
1 | 63 |
4185 | 64 // TRUE means we should try to enter the debugger on SIGINT. |
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65 bool Vdebug_on_interrupt = false; |
4185 | 66 |
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67 // Allow users to avoid writing octave-workspace for SIGHUP (sent by |
4449 | 68 // closing gnome-terminal, for example). Note that this variable has |
69 // no effect if Vcrash_dumps_octave_core is FALSE. | |
5794 | 70 static bool Vsighup_dumps_octave_core = true; |
4449 | 71 |
72 // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. | |
5794 | 73 static bool Vsigterm_dumps_octave_core = true; |
4449 | 74 |
5142 | 75 // List of signals we have caught since last call to octave_signal_handler. |
76 static bool octave_signals_caught[NSIG]; | |
77 | |
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78 // Forward declaration. |
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79 static void user_abort (const char *sig_name, int sig_number); |
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80 |
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81 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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82 |
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83 #define WIN32_LEAN_AND_MEAN |
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84 #include <windows.h> |
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85 |
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86 class |
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87 w32_interrupt_manager |
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88 { |
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89 public: |
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90 ~w32_interrupt_manager (void) |
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91 { |
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92 if (thread) |
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93 CloseHandle (thread); |
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94 } |
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95 |
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96 static bool init (void) { return instance_ok (); } |
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97 |
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98 static void octave_jump_to_enclosing_context (void) |
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99 { |
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100 if (instance_ok ()) |
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101 instance->do_octave_jump_to_enclosing_context (); |
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102 } |
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103 |
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104 static void user_abort (const char *sig_name, int sig_number) |
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105 { |
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106 if (instance_ok ()) |
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107 instance->do_user_abort (sig_name, sig_number); |
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108 } |
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109 |
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110 static void raise_sigint (void) |
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111 { |
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112 if (instance_ok ()) |
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113 instance->do_raise_sigint (); |
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114 } |
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115 |
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116 private: |
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117 w32_interrupt_manager (void) |
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118 : thread (0), thread_id (0) |
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119 { |
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120 thread_id = GetCurrentThreadId (); |
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121 |
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122 DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), |
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123 GetCurrentProcess (), &thread, 0, FALSE, |
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124 DUPLICATE_SAME_ACCESS); |
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125 } |
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126 |
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127 static void octave_jump_to_enclosing_context_sync (void) |
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128 { |
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129 #ifdef _MSC_VER |
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130 _fpreset (); |
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131 #endif |
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132 ::octave_jump_to_enclosing_context (); |
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133 } |
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134 |
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135 void do_octave_jump_to_enclosing_context (void) |
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136 { |
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137 bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); |
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138 |
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139 if (is_interrupt_thread) |
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140 octave_jump_to_enclosing_context_sync (); |
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141 else |
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142 { |
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143 // 64-bit Windows does not appear to have threadContext.Eip. |
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144 // Something else must be done here to allow interrupts to |
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145 // properly work across threads. |
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146 |
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147 #if ! (defined (__MINGW64__) || defined (_WIN64)) |
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148 |
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149 CONTEXT threadContext; |
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150 |
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151 SuspendThread (thread); |
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152 threadContext.ContextFlags = CONTEXT_CONTROL; |
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153 GetThreadContext (thread, &threadContext); |
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154 threadContext.Eip = (DWORD) octave_jump_to_enclosing_context_sync; |
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155 SetThreadContext (thread, &threadContext); |
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156 ResumeThread (thread); |
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157 #endif |
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158 } |
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159 } |
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160 |
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161 void do_user_abort (const char *sig_name, int sig_number) |
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162 { |
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163 bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); |
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164 |
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165 if (is_interrupt_thread) |
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166 ::user_abort (sig_name, sig_number); |
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167 else |
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168 { |
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169 SuspendThread (thread); |
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170 ::user_abort (sig_name, sig_number); |
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171 ResumeThread (thread); |
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172 } |
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173 } |
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174 |
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175 void do_raise_sigint (void) |
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176 { |
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177 bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); |
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178 |
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179 if (is_interrupt_thread) |
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180 ::raise (SIGINT); |
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181 else |
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182 { |
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183 SuspendThread (thread); |
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184 ::raise (SIGINT); |
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185 ResumeThread (thread); |
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186 } |
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187 } |
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188 |
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189 static bool instance_ok (void) |
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190 { |
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191 bool retval = true; |
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192 |
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193 if (! instance) |
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194 { |
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195 instance = new w32_interrupt_manager (); |
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196 |
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197 if (instance) |
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198 singleton_cleanup_list::add (cleanup_instance); |
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199 } |
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200 |
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201 if (! instance) |
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202 error ("unable to create w32_interrupt_manager"); |
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203 |
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204 return retval; |
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205 } |
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206 |
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207 static void cleanup_instance (void) { delete instance; instance = 0; } |
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208 |
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209 private: |
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210 // A handle to the thread that is running the octave interpreter. |
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211 HANDLE thread; |
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212 |
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213 // The ID of the thread that is running the octave interpreter. |
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214 DWORD thread_id; |
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215 |
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216 static w32_interrupt_manager* instance; |
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217 }; |
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218 |
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219 w32_interrupt_manager* w32_interrupt_manager::instance = 0; |
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220 |
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221 void w32_raise_sigint (void) |
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222 { |
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223 w32_interrupt_manager::raise_sigint (); |
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224 } |
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225 |
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226 #endif |
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227 |
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228 // Signal handler return type. |
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229 #ifndef BADSIG |
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230 #define BADSIG (void (*)(int))-1 |
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231 #endif |
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232 |
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233 // The following is a workaround for an apparent bug in GCC 4.1.2 and |
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234 // possibly earlier versions. See Octave bug report #30685 for details. |
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235 #if defined (__GNUC__) |
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236 # if ! (__GNUC__ > 4 \ |
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237 || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \ |
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238 || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2)))) |
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239 # undef GNULIB_NAMESPACE |
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240 # define GNULIB_NAMESPACE |
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241 # warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC" |
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242 # endif |
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243 #endif |
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244 |
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245 #define BLOCK_SIGNAL(sig, nvar, ovar) \ |
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246 do \ |
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247 { \ |
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248 GNULIB_NAMESPACE::sigemptyset (&nvar); \ |
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249 GNULIB_NAMESPACE::sigaddset (&nvar, sig); \ |
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250 GNULIB_NAMESPACE::sigemptyset (&ovar); \ |
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251 GNULIB_NAMESPACE::sigprocmask (SIG_BLOCK, &nvar, &ovar); \ |
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252 } \ |
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253 while (0) |
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254 |
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255 #if ! defined (SIGCHLD) && defined (SIGCLD) |
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256 #define SIGCHLD SIGCLD |
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257 #endif |
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258 |
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259 #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar) |
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260 #define UNBLOCK_CHILD(ovar) GNULIB_NAMESPACE::sigprocmask (SIG_SETMASK, &ovar, 0) |
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261 |
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262 // Called from octave_quit () to actually do something about the signals |
5142 | 263 // we have caught. |
264 | |
265 void | |
266 octave_signal_handler (void) | |
267 { | |
268 // The list of signals is relatively short, so we will just go | |
269 // linearly through the list. | |
270 | |
271 for (int i = 0; i < NSIG; i++) | |
272 { | |
273 if (octave_signals_caught[i]) | |
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274 { |
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275 octave_signals_caught[i] = false; |
5142 | 276 |
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277 switch (i) |
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278 { |
5451 | 279 #ifdef SIGCHLD |
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280 case SIGCHLD: |
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281 { |
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282 volatile octave_interrupt_handler saved_interrupt_handler |
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283 = octave_ignore_interrupts (); |
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284 |
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285 sigset_t set, oset; |
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286 |
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287 BLOCK_CHILD (set, oset); |
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288 |
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289 octave_child_list::wait (); |
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290 |
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291 octave_set_interrupt_handler (saved_interrupt_handler); |
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292 |
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293 UNBLOCK_CHILD (oset); |
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294 |
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295 octave_child_list::reap (); |
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296 } |
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297 break; |
5451 | 298 #endif |
5142 | 299 |
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300 case SIGFPE: |
14893 | 301 std::cerr << "warning: floating point exception" << std::endl; |
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302 break; |
5142 | 303 |
5451 | 304 #ifdef SIGPIPE |
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305 case SIGPIPE: |
14893 | 306 std::cerr << "warning: broken pipe" << std::endl; |
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307 break; |
5451 | 308 #endif |
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309 } |
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310 } |
5142 | 311 } |
312 } | |
313 | |
1 | 314 static void |
4787 | 315 my_friendly_exit (const char *sig_name, int sig_number, |
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316 bool save_vars = true) |
1 | 317 { |
2536 | 318 static bool been_there_done_that = false; |
319 | |
320 if (been_there_done_that) | |
321 { | |
2554 | 322 #if defined (SIGABRT) |
2536 | 323 octave_set_signal_handler (SIGABRT, SIG_DFL); |
324 #endif | |
325 | |
3644 | 326 std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; |
5451 | 327 |
328 MINGW_SIGNAL_CLEANUP (); | |
329 | |
2536 | 330 abort (); |
331 } | |
332 else | |
333 { | |
334 been_there_done_that = true; | |
1373 | 335 |
3644 | 336 std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; |
2536 | 337 |
4787 | 338 if (save_vars) |
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339 dump_octave_core (); |
2536 | 340 |
3162 | 341 if (sig_number < 0) |
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342 { |
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343 MINGW_SIGNAL_CLEANUP (); |
5451 | 344 |
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345 exit (1); |
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346 } |
3162 | 347 else |
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348 { |
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349 octave_set_signal_handler (sig_number, SIG_DFL); |
3162 | 350 |
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351 GNULIB_NAMESPACE::raise (sig_number); |
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352 } |
2536 | 353 } |
1 | 354 } |
355 | |
1446 | 356 sig_handler * |
5770 | 357 octave_set_signal_handler (int sig, sig_handler *handler, |
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358 bool restart_syscalls) |
1446 | 359 { |
360 struct sigaction act, oact; | |
5144 | 361 |
1446 | 362 act.sa_handler = handler; |
363 act.sa_flags = 0; | |
5144 | 364 |
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365 #if defined (SIGALRM) |
5144 | 366 if (sig == SIGALRM) |
367 { | |
368 #if defined (SA_INTERRUPT) | |
369 act.sa_flags |= SA_INTERRUPT; | |
370 #endif | |
371 } | |
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372 #endif |
5144 | 373 #if defined (SA_RESTART) |
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374 #if defined (SIGALRM) |
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375 else |
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376 #endif |
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377 // FIXME: Do we also need to explicitly disable SA_RESTART? |
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378 if (restart_syscalls) |
5770 | 379 act.sa_flags |= SA_RESTART; |
5144 | 380 #endif |
381 | |
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382 GNULIB_NAMESPACE::sigemptyset (&act.sa_mask); |
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383 GNULIB_NAMESPACE::sigemptyset (&oact.sa_mask); |
5144 | 384 |
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385 GNULIB_NAMESPACE::sigaction (sig, &act, &oact); |
5144 | 386 |
1446 | 387 return oact.sa_handler; |
388 } | |
389 | |
10246 | 390 static void |
1446 | 391 generic_sig_handler (int sig) |
1 | 392 { |
5844 | 393 my_friendly_exit (strsignal (sig), sig); |
1 | 394 } |
395 | |
2091 | 396 // Handle SIGCHLD. |
1230 | 397 |
4064 | 398 #ifdef SIGCHLD |
10246 | 399 static void |
2092 | 400 sigchld_handler (int /* sig */) |
1230 | 401 { |
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402 octave_signal_caught = 1; |
2626 | 403 |
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404 octave_signals_caught[SIGCHLD] = true; |
1230 | 405 } |
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406 #endif |
1230 | 407 |
4064 | 408 #ifdef SIGFPE |
1373 | 409 #if defined (__alpha__) |
10246 | 410 static void |
1488 | 411 sigfpe_handler (int /* sig */) |
1373 | 412 { |
5142 | 413 if (can_interrupt && octave_interrupt_state >= 0) |
414 { | |
415 octave_signal_caught = 1; | |
1373 | 416 |
5142 | 417 octave_signals_caught[SIGFPE] = true; |
4182 | 418 |
5142 | 419 octave_interrupt_state++; |
420 } | |
1373 | 421 } |
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422 #endif |
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423 #endif |
1373 | 424 |
4449 | 425 #if defined (SIGHUP) || defined (SIGTERM) |
10246 | 426 static void |
4449 | 427 sig_hup_or_term_handler (int sig) |
428 { | |
429 switch (sig) | |
430 { | |
431 #if defined (SIGHUP) | |
432 case SIGHUP: | |
433 { | |
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434 if (Vsighup_dumps_octave_core) |
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435 dump_octave_core (); |
4449 | 436 } |
437 break; | |
438 #endif | |
439 | |
440 #if defined (SIGTERM) | |
441 case SIGTERM: | |
442 { | |
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443 if (Vsigterm_dumps_octave_core) |
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444 dump_octave_core (); |
4449 | 445 } |
446 break; | |
447 #endif | |
448 | |
449 default: | |
450 break; | |
451 } | |
452 | |
453 clean_up_and_exit (0); | |
454 } | |
455 #endif | |
456 | |
3343 | 457 #if 0 |
3281 | 458 #if defined (SIGWINCH) |
10246 | 459 static void |
3281 | 460 sigwinch_handler (int /* sig */) |
461 { | |
462 command_editor::resize_terminal (); | |
463 } | |
464 #endif | |
3343 | 465 #endif |
3281 | 466 |
635 | 467 // Handle SIGINT by restarting the parser (see octave.cc). |
2554 | 468 // |
469 // This also has to work for SIGBREAK (on systems that have it), so we | |
470 // use the value of sig, instead of just assuming that it is called | |
471 // for SIGINT only. | |
635 | 472 |
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473 static void |
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474 user_abort (const char *sig_name, int sig_number) |
1 | 475 { |
4172 | 476 if (! octave_initialized) |
477 exit (1); | |
478 | |
1 | 479 if (can_interrupt) |
480 { | |
4185 | 481 if (Vdebug_on_interrupt) |
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482 { |
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483 if (! octave_debug_on_interrupt_state) |
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484 { |
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485 tree_evaluator::debug_mode = true; |
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486 octave_debug_on_interrupt_state = true; |
4185 | 487 |
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488 return; |
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489 } |
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490 else |
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491 { |
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492 // Clear the flag and do normal interrupt stuff. |
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493 |
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494 tree_evaluator::debug_mode |
10194 | 495 = bp_table::have_breakpoints () || Vdebugging; |
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496 octave_debug_on_interrupt_state = false; |
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497 } |
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498 } |
4185 | 499 |
4153 | 500 if (octave_interrupt_immediately) |
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501 { |
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502 if (octave_interrupt_state == 0) |
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503 octave_interrupt_state = 1; |
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504 |
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505 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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506 w32_interrupt_manager::octave_jump_to_enclosing_context (); |
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507 #else |
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508 octave_jump_to_enclosing_context (); |
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509 #endif |
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510 } |
4429 | 511 else |
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512 { |
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513 // If we are already cleaning up from a previous interrupt, |
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514 // take note of the fact that another interrupt signal has |
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515 // arrived. |
4793 | 516 |
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517 if (octave_interrupt_state < 0) |
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518 octave_interrupt_state = 0; |
4793 | 519 |
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520 octave_signal_caught = 1; |
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521 octave_interrupt_state++; |
4787 | 522 |
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523 if (interactive && ! forced_interactive |
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524 && octave_interrupt_state == 2) |
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525 std::cerr << "Press Control-C again to abort." << std::endl; |
4787 | 526 |
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527 if (octave_interrupt_state >= 3) |
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528 my_friendly_exit (sig_name, sig_number, true); |
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529 } |
1 | 530 } |
531 | |
5451 | 532 } |
533 | |
10246 | 534 static void |
5451 | 535 sigint_handler (int sig) |
536 { | |
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537 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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538 w32_interrupt_manager::user_abort (strsignal (sig), sig); |
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539 #else |
5844 | 540 user_abort (strsignal (sig), sig); |
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541 #endif |
1 | 542 } |
543 | |
4064 | 544 #ifdef SIGPIPE |
10246 | 545 static void |
1488 | 546 sigpipe_handler (int /* sig */) |
1 | 547 { |
5142 | 548 octave_signal_caught = 1; |
549 | |
550 octave_signals_caught[SIGPIPE] = true; | |
1 | 551 |
1358 | 552 // Don't loop forever on account of this. |
553 | |
5142 | 554 if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) |
4787 | 555 octave_interrupt_state++; |
1 | 556 } |
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557 #endif |
1 | 558 |
2705 | 559 octave_interrupt_handler |
2554 | 560 octave_catch_interrupts (void) |
561 { | |
2705 | 562 octave_interrupt_handler retval; |
2554 | 563 |
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564 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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565 w32_interrupt_manager::init (); |
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566 #endif |
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567 |
2554 | 568 #ifdef SIGINT |
2705 | 569 retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); |
2554 | 570 #endif |
571 | |
572 #ifdef SIGBREAK | |
2705 | 573 retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); |
2554 | 574 #endif |
2705 | 575 |
576 return retval; | |
2554 | 577 } |
578 | |
2705 | 579 octave_interrupt_handler |
580 octave_ignore_interrupts (void) | |
2554 | 581 { |
2705 | 582 octave_interrupt_handler retval; |
583 | |
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584 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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585 w32_interrupt_manager::init (); |
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586 #endif |
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587 |
2554 | 588 #ifdef SIGINT |
2705 | 589 retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); |
2554 | 590 #endif |
591 | |
592 #ifdef SIGBREAK | |
2705 | 593 retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); |
2554 | 594 #endif |
2705 | 595 |
596 return retval; | |
597 } | |
598 | |
599 octave_interrupt_handler | |
5770 | 600 octave_set_interrupt_handler (const volatile octave_interrupt_handler& h, |
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601 bool restart_syscalls) |
2705 | 602 { |
603 octave_interrupt_handler retval; | |
604 | |
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605 #if defined (__WIN32__) && ! defined (__CYGWIN__) |
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606 w32_interrupt_manager::init (); |
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607 #endif |
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608 |
2705 | 609 #ifdef SIGINT |
5770 | 610 retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler, |
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611 restart_syscalls); |
2705 | 612 #endif |
613 | |
614 #ifdef SIGBREAK | |
5770 | 615 retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler, |
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616 restart_syscalls); |
2705 | 617 #endif |
618 | |
619 return retval; | |
1651 | 620 } |
621 | |
635 | 622 // Install all the handlers for the signals we might care about. |
623 | |
1 | 624 void |
625 install_signal_handlers (void) | |
626 { | |
5142 | 627 for (int i = 0; i < NSIG; i++) |
628 octave_signals_caught[i] = false; | |
629 | |
2554 | 630 octave_catch_interrupts (); |
631 | |
1 | 632 #ifdef SIGABRT |
1446 | 633 octave_set_signal_handler (SIGABRT, generic_sig_handler); |
1 | 634 #endif |
635 | |
636 #ifdef SIGALRM | |
1446 | 637 octave_set_signal_handler (SIGALRM, generic_sig_handler); |
1 | 638 #endif |
639 | |
640 #ifdef SIGBUS | |
1446 | 641 octave_set_signal_handler (SIGBUS, generic_sig_handler); |
1 | 642 #endif |
643 | |
1230 | 644 #ifdef SIGCHLD |
1446 | 645 octave_set_signal_handler (SIGCHLD, sigchld_handler); |
1230 | 646 #endif |
647 | |
3174 | 648 // SIGCLD |
649 // SIGCONT | |
650 | |
1 | 651 #ifdef SIGEMT |
1446 | 652 octave_set_signal_handler (SIGEMT, generic_sig_handler); |
1 | 653 #endif |
654 | |
655 #ifdef SIGFPE | |
1373 | 656 #if defined (__alpha__) |
1446 | 657 octave_set_signal_handler (SIGFPE, sigfpe_handler); |
1373 | 658 #else |
1446 | 659 octave_set_signal_handler (SIGFPE, generic_sig_handler); |
1 | 660 #endif |
1373 | 661 #endif |
1 | 662 |
663 #ifdef SIGHUP | |
4449 | 664 octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); |
1 | 665 #endif |
666 | |
667 #ifdef SIGILL | |
1446 | 668 octave_set_signal_handler (SIGILL, generic_sig_handler); |
1 | 669 #endif |
670 | |
3174 | 671 // SIGINFO |
672 // SIGINT | |
673 | |
1 | 674 #ifdef SIGIOT |
1446 | 675 octave_set_signal_handler (SIGIOT, generic_sig_handler); |
1 | 676 #endif |
677 | |
678 #ifdef SIGLOST | |
1446 | 679 octave_set_signal_handler (SIGLOST, generic_sig_handler); |
1 | 680 #endif |
681 | |
682 #ifdef SIGPIPE | |
1446 | 683 octave_set_signal_handler (SIGPIPE, sigpipe_handler); |
1 | 684 #endif |
685 | |
686 #ifdef SIGPOLL | |
1446 | 687 octave_set_signal_handler (SIGPOLL, SIG_IGN); |
1 | 688 #endif |
689 | |
5866 | 690 // SIGPROF |
3174 | 691 // SIGPWR |
692 | |
1 | 693 #ifdef SIGQUIT |
1446 | 694 octave_set_signal_handler (SIGQUIT, generic_sig_handler); |
1 | 695 #endif |
696 | |
697 #ifdef SIGSEGV | |
1446 | 698 octave_set_signal_handler (SIGSEGV, generic_sig_handler); |
1 | 699 #endif |
700 | |
3174 | 701 // SIGSTOP |
702 | |
1 | 703 #ifdef SIGSYS |
1446 | 704 octave_set_signal_handler (SIGSYS, generic_sig_handler); |
1 | 705 #endif |
706 | |
707 #ifdef SIGTERM | |
4449 | 708 octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); |
1 | 709 #endif |
710 | |
711 #ifdef SIGTRAP | |
1446 | 712 octave_set_signal_handler (SIGTRAP, generic_sig_handler); |
1 | 713 #endif |
714 | |
3174 | 715 // SIGTSTP |
716 // SIGTTIN | |
717 // SIGTTOU | |
718 // SIGURG | |
719 | |
1 | 720 #ifdef SIGUSR1 |
1446 | 721 octave_set_signal_handler (SIGUSR1, generic_sig_handler); |
1 | 722 #endif |
723 | |
724 #ifdef SIGUSR2 | |
1446 | 725 octave_set_signal_handler (SIGUSR2, generic_sig_handler); |
1 | 726 #endif |
727 | |
728 #ifdef SIGVTALRM | |
1446 | 729 octave_set_signal_handler (SIGVTALRM, generic_sig_handler); |
1 | 730 #endif |
731 | |
895 | 732 #ifdef SIGIO |
1446 | 733 octave_set_signal_handler (SIGIO, SIG_IGN); |
895 | 734 #endif |
735 | |
3343 | 736 #if 0 |
3281 | 737 #ifdef SIGWINCH |
738 octave_set_signal_handler (SIGWINCH, sigwinch_handler); | |
739 #endif | |
3343 | 740 #endif |
3174 | 741 |
1 | 742 #ifdef SIGXCPU |
1446 | 743 octave_set_signal_handler (SIGXCPU, generic_sig_handler); |
1 | 744 #endif |
745 | |
746 #ifdef SIGXFSZ | |
1446 | 747 octave_set_signal_handler (SIGXFSZ, generic_sig_handler); |
1 | 748 #endif |
5451 | 749 |
1 | 750 } |
751 | |
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752 static octave_scalar_map |
4294 | 753 make_sig_struct (void) |
754 { | |
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755 octave_scalar_map m; |
4294 | 756 |
757 #ifdef SIGABRT | |
4675 | 758 m.assign ("ABRT", SIGABRT); |
4294 | 759 #endif |
760 | |
761 #ifdef SIGALRM | |
4675 | 762 m.assign ("ALRM", SIGALRM); |
4294 | 763 #endif |
764 | |
765 #ifdef SIGBUS | |
4675 | 766 m.assign ("BUS", SIGBUS); |
4294 | 767 #endif |
768 | |
769 #ifdef SIGCHLD | |
4675 | 770 m.assign ("CHLD", SIGCHLD); |
4294 | 771 #endif |
772 | |
773 #ifdef SIGCLD | |
4675 | 774 m.assign ("CLD", SIGCLD); |
4294 | 775 #endif |
776 | |
777 #ifdef SIGCONT | |
4675 | 778 m.assign ("CONT", SIGCONT); |
4294 | 779 #endif |
780 | |
781 #ifdef SIGEMT | |
4675 | 782 m.assign ("EMT", SIGEMT); |
4294 | 783 #endif |
784 | |
785 #ifdef SIGFPE | |
4675 | 786 m.assign ("FPE", SIGFPE); |
4294 | 787 #endif |
788 | |
789 #ifdef SIGHUP | |
4675 | 790 m.assign ("HUP", SIGHUP); |
4294 | 791 #endif |
792 | |
793 #ifdef SIGILL | |
4675 | 794 m.assign ("ILL", SIGILL); |
4294 | 795 #endif |
796 | |
797 #ifdef SIGINFO | |
4675 | 798 m.assign ("INFO", SIGINFO); |
4294 | 799 #endif |
800 | |
801 #ifdef SIGINT | |
4675 | 802 m.assign ("INT", SIGINT); |
4294 | 803 #endif |
804 | |
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805 #ifdef SIGIO |
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806 m.assign ("IO", SIGIO); |
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807 #endif |
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808 |
4294 | 809 #ifdef SIGIOT |
4675 | 810 m.assign ("IOT", SIGIOT); |
4294 | 811 #endif |
812 | |
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813 #ifdef SIGKILL |
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814 m.assign ("KILL", SIGKILL); |
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815 #endif |
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816 |
4294 | 817 #ifdef SIGLOST |
4675 | 818 m.assign ("LOST", SIGLOST); |
4294 | 819 #endif |
820 | |
821 #ifdef SIGPIPE | |
4675 | 822 m.assign ("PIPE", SIGPIPE); |
4294 | 823 #endif |
824 | |
825 #ifdef SIGPOLL | |
4675 | 826 m.assign ("POLL", SIGPOLL); |
4294 | 827 #endif |
828 | |
829 #ifdef SIGPROF | |
4675 | 830 m.assign ("PROF", SIGPROF); |
4294 | 831 #endif |
832 | |
833 #ifdef SIGPWR | |
4675 | 834 m.assign ("PWR", SIGPWR); |
4294 | 835 #endif |
836 | |
837 #ifdef SIGQUIT | |
4675 | 838 m.assign ("QUIT", SIGQUIT); |
4294 | 839 #endif |
840 | |
841 #ifdef SIGSEGV | |
4675 | 842 m.assign ("SEGV", SIGSEGV); |
4294 | 843 #endif |
844 | |
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845 #ifdef SIGSTKFLT |
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846 m.assign ("STKFLT", SIGSTKFLT); |
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847 #endif |
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848 |
4294 | 849 #ifdef SIGSTOP |
4675 | 850 m.assign ("STOP", SIGSTOP); |
4294 | 851 #endif |
852 | |
853 #ifdef SIGSYS | |
4675 | 854 m.assign ("SYS", SIGSYS); |
4294 | 855 #endif |
856 | |
857 #ifdef SIGTERM | |
4675 | 858 m.assign ("TERM", SIGTERM); |
4294 | 859 #endif |
860 | |
861 #ifdef SIGTRAP | |
4675 | 862 m.assign ("TRAP", SIGTRAP); |
4294 | 863 #endif |
864 | |
865 #ifdef SIGTSTP | |
4675 | 866 m.assign ("TSTP", SIGTSTP); |
4294 | 867 #endif |
868 | |
869 #ifdef SIGTTIN | |
4675 | 870 m.assign ("TTIN", SIGTTIN); |
4294 | 871 #endif |
872 | |
873 #ifdef SIGTTOU | |
4675 | 874 m.assign ("TTOU", SIGTTOU); |
4294 | 875 #endif |
876 | |
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877 #ifdef SIGUNUSED |
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878 m.assign ("UNUSED", SIGUNUSED); |
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879 #endif |
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880 |
4294 | 881 #ifdef SIGURG |
4675 | 882 m.assign ("URG", SIGURG); |
4294 | 883 #endif |
884 | |
885 #ifdef SIGUSR1 | |
4675 | 886 m.assign ("USR1", SIGUSR1); |
4294 | 887 #endif |
888 | |
889 #ifdef SIGUSR2 | |
4675 | 890 m.assign ("USR2", SIGUSR2); |
4294 | 891 #endif |
892 | |
893 #ifdef SIGVTALRM | |
4675 | 894 m.assign ("VTALRM", SIGVTALRM); |
4294 | 895 #endif |
896 | |
897 #ifdef SIGWINCH | |
4675 | 898 m.assign ("WINCH", SIGWINCH); |
4294 | 899 #endif |
900 | |
901 #ifdef SIGXCPU | |
4675 | 902 m.assign ("XCPU", SIGXCPU); |
4294 | 903 #endif |
904 | |
905 #ifdef SIGXFSZ | |
4675 | 906 m.assign ("XFSZ", SIGXFSZ); |
4294 | 907 #endif |
908 | |
909 return m; | |
910 } | |
911 | |
5142 | 912 octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; |
5128 | 913 |
2926 | 914 bool |
915 octave_child_list::instance_ok (void) | |
916 { | |
917 bool retval = true; | |
918 | |
919 if (! instance) | |
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920 { |
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921 instance = new octave_child_list_rep (); |
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922 |
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923 if (instance) |
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924 singleton_cleanup_list::add (cleanup_instance); |
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925 } |
2926 | 926 |
927 if (! instance) | |
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928 error ("unable to create child list object!"); |
2926 | 929 |
930 return retval; | |
931 } | |
932 | |
933 void | |
5142 | 934 octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) |
935 { | |
936 if (instance_ok ()) | |
937 instance->insert (pid, f); | |
938 } | |
939 | |
940 void | |
941 octave_child_list::reap (void) | |
2926 | 942 { |
943 if (instance_ok ()) | |
5142 | 944 instance->reap (); |
945 } | |
946 | |
947 bool | |
948 octave_child_list::wait (void) | |
949 { | |
950 return (instance_ok ()) ? instance->wait () : false; | |
2926 | 951 } |
952 | |
5142 | 953 class pid_equal |
954 { | |
955 public: | |
956 | |
957 pid_equal (pid_t v) : val (v) { } | |
958 | |
959 bool operator () (const octave_child& oc) const { return oc.pid == val; } | |
960 | |
961 private: | |
962 | |
963 pid_t val; | |
964 }; | |
965 | |
2926 | 966 void |
967 octave_child_list::remove (pid_t pid) | |
968 { | |
969 if (instance_ok ()) | |
5142 | 970 instance->remove_if (pid_equal (pid)); |
2926 | 971 } |
972 | |
5142 | 973 #define OCL_REP octave_child_list::octave_child_list_rep |
2926 | 974 |
5142 | 975 void |
976 OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) | |
2926 | 977 { |
5142 | 978 append (octave_child (pid, f)); |
2926 | 979 } |
980 | |
2209 | 981 void |
5142 | 982 OCL_REP::reap (void) |
2209 | 983 { |
5142 | 984 // Mark the record for PID invalid. |
2209 | 985 |
5142 | 986 for (iterator p = begin (); p != end (); p++) |
987 { | |
988 // The call to the octave_child::child_event_handler might | |
989 // invalidate the iterator (for example, by calling | |
990 // octave_child_list::remove), so we increment the iterator | |
991 // here. | |
2209 | 992 |
5142 | 993 octave_child& oc = *p; |
2209 | 994 |
5142 | 995 if (oc.have_status) |
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996 { |
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997 oc.have_status = 0; |
5142 | 998 |
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999 octave_child::child_event_handler f = oc.handler; |
5142 | 1000 |
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1001 if (f && f (oc.pid, oc.status)) |
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1002 oc.pid = -1; |
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1003 } |
2209 | 1004 } |
1005 | |
5142 | 1006 remove_if (pid_equal (-1)); |
2209 | 1007 } |
1008 | |
5142 | 1009 // Wait on our children and record any changes in their status. |
1010 | |
1011 bool | |
1012 OCL_REP::wait (void) | |
2210 | 1013 { |
5142 | 1014 bool retval = false; |
2210 | 1015 |
5142 | 1016 for (iterator p = begin (); p != end (); p++) |
2210 | 1017 { |
5142 | 1018 octave_child& oc = *p; |
1019 | |
1020 pid_t pid = oc.pid; | |
1021 | |
1022 if (pid > 0) | |
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1023 { |
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1024 int status; |
2210 | 1025 |
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1026 if (octave_syscalls::waitpid (pid, &status, WNOHANG) > 0) |
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1027 { |
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1028 oc.have_status = 1; |
5142 | 1029 |
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1030 oc.status = status; |
5142 | 1031 |
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1032 retval = true; |
5142 | 1033 |
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1034 break; |
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1035 } |
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1036 } |
2210 | 1037 } |
1038 | |
5142 | 1039 return retval; |
2210 | 1040 } |
1041 | |
5780 | 1042 DEFUN (SIG, args, , |
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1043 "-*- texinfo -*-\n\ |
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1044 @deftypefn {} {} SIG ()\n\ |
5780 | 1045 Return a structure containing Unix signal names and their defined values.\n\ |
1046 @end deftypefn") | |
1047 { | |
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1048 if (args.length () != 0) |
5823 | 1049 print_usage (); |
5780 | 1050 |
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1051 static octave_scalar_map m = make_sig_struct (); |
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1052 |
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1053 return ovl (m); |
5780 | 1054 } |
1055 | |
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1056 /* |
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1057 %!assert (isstruct (SIG ())) |
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1058 %!assert (! isempty (SIG ())) |
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1059 |
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1060 %!error SIG (1) |
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1061 */ |
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1062 |
5794 | 1063 DEFUN (debug_on_interrupt, args, nargout, |
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1064 "-*- texinfo -*-\n\ |
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1065 @deftypefn {} {@var{val} =} debug_on_interrupt ()\n\ |
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1066 @deftypefnx {} {@var{old_val} =} debug_on_interrupt (@var{new_val})\n\ |
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1067 @deftypefnx {} {} debug_on_interrupt (@var{new_val}, \"local\")\n\ |
5794 | 1068 Query or set the internal variable that controls whether Octave will try\n\ |
1069 to enter debugging mode when it receives an interrupt signal (typically\n\ | |
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1070 generated with @kbd{C-c}).\n\ |
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1071 \n\ |
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1072 If a second interrupt signal is received before reaching the debugging mode,\n\ |
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1073 a normal interrupt will occur.\n\ |
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1074 \n\ |
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1075 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1076 variable is changed locally for the function and any subroutines it calls.\n\ |
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1077 The original variable value is restored when exiting the function.\n\ |
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1078 @seealso{debug_on_error, debug_on_warning}\n\ |
5794 | 1079 @end deftypefn") |
4449 | 1080 { |
5794 | 1081 return SET_INTERNAL_VARIABLE (debug_on_interrupt); |
4449 | 1082 } |
1083 | |
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1084 /* |
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1085 %!test |
12832 | 1086 %! orig_val = debug_on_interrupt (); |
1087 %! old_val = debug_on_interrupt (! orig_val); | |
1088 %! assert (orig_val, old_val); | |
1089 %! assert (debug_on_interrupt (), ! orig_val); | |
1090 %! debug_on_interrupt (orig_val); | |
1091 %! assert (debug_on_interrupt (), orig_val); | |
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1092 |
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1093 %!error (debug_on_interrupt (1, 2)) |
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1094 */ |
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1095 |
5794 | 1096 DEFUN (sighup_dumps_octave_core, args, nargout, |
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1097 "-*- texinfo -*-\n\ |
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1098 @deftypefn {} {@var{val} =} sighup_dumps_octave_core ()\n\ |
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1099 @deftypefnx {} {@var{old_val} =} sighup_dumps_octave_core (@var{new_val})\n\ |
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1100 @deftypefnx {} {} sighup_dumps_octave_core (@var{new_val}, \"local\")\n\ |
5794 | 1101 Query or set the internal variable that controls whether Octave tries\n\ |
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1102 to save all current variables to the file @file{octave-workspace} if it\n\ |
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1103 receives a hangup signal.\n\ |
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1104 \n\ |
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1105 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1106 variable is changed locally for the function and any subroutines it calls.\n\ |
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1107 The original variable value is restored when exiting the function.\n\ |
5794 | 1108 @end deftypefn") |
4185 | 1109 { |
5794 | 1110 return SET_INTERNAL_VARIABLE (sighup_dumps_octave_core); |
1111 } | |
4294 | 1112 |
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1113 /* |
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1114 %!test |
12832 | 1115 %! orig_val = sighup_dumps_octave_core (); |
1116 %! old_val = sighup_dumps_octave_core (! orig_val); | |
1117 %! assert (orig_val, old_val); | |
1118 %! assert (sighup_dumps_octave_core (), ! orig_val); | |
1119 %! sighup_dumps_octave_core (orig_val); | |
1120 %! assert (sighup_dumps_octave_core (), orig_val); | |
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1121 |
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1122 %!error (sighup_dumps_octave_core (1, 2)) |
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1123 */ |
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1124 |
5794 | 1125 DEFUN (sigterm_dumps_octave_core, args, nargout, |
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1126 "-*- texinfo -*-\n\ |
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1127 @deftypefn {} {@var{val} =} sigterm_dumps_octave_core ()\n\ |
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1128 @deftypefnx {} {@var{old_val} =} sigterm_dumps_octave_core (@var{new_val})\n\ |
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1129 @deftypefnx {} {} sigterm_dumps_octave_core (@var{new_val}, \"local\")\n\ |
5794 | 1130 Query or set the internal variable that controls whether Octave tries\n\ |
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1131 to save all current variables to the file @file{octave-workspace} if it\n\ |
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1132 receives a terminate signal.\n\ |
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1133 \n\ |
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1134 When called from inside a function with the @qcode{\"local\"} option, the\n\ |
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1135 variable is changed locally for the function and any subroutines it calls.\n\ |
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1136 The original variable value is restored when exiting the function.\n\ |
5794 | 1137 @end deftypefn") |
1138 { | |
1139 return SET_INTERNAL_VARIABLE (sigterm_dumps_octave_core); | |
4185 | 1140 } |
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1141 |
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1142 /* |
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1143 %!test |
12832 | 1144 %! orig_val = sigterm_dumps_octave_core (); |
1145 %! old_val = sigterm_dumps_octave_core (! orig_val); | |
1146 %! assert (orig_val, old_val); | |
1147 %! assert (sigterm_dumps_octave_core (), ! orig_val); | |
1148 %! sigterm_dumps_octave_core (orig_val); | |
1149 %! assert (sigterm_dumps_octave_core (), orig_val); | |
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1150 |
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1151 %!error (sigterm_dumps_octave_core (1, 2)) |
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1152 */ |