Mercurial > octave
view libinterp/corefcn/sighandlers.cc @ 21724:aba2e6293dd8
use "#if ..." consistently instead of "#ifdef" and "#ifndef"
* configure.ac, Doxyfile.in, make_int.cc, Backend.cc, BaseControl.cc,
ButtonControl.cc, Canvas.cc, CheckBoxControl.cc, Container.cc,
ContextMenu.cc, EditControl.cc, Figure.cc, FigureWindow.cc,
GLCanvas.cc, KeyMap.cc, ListBoxControl.cc, Logger.cc, Menu.cc,
MouseModeActionGroup.cc, Object.cc, ObjectFactory.cc,
ObjectProxy.cc, Panel.cc, PopupMenuControl.cc, PushButtonControl.cc,
PushTool.cc, QtHandlesUtils.cc, RadioButtonControl.cc,
SliderControl.cc, TextControl.cc, TextEdit.cc,
ToggleButtonControl.cc, ToggleTool.cc, ToolBar.cc, __init_qt__.cc,
annotation-dialog.cc, gl-select.cc, module.mk, color-picker.cc,
dialog.cc, documentation-dock-widget.cc, files-dock-widget.cc,
find-files-dialog.cc, find-files-model.cc, history-dock-widget.cc,
liboctgui-build-info.in.cc, file-editor-tab.cc, file-editor.cc,
find-dialog.cc, marker.cc, marker.h, octave-qscintilla.cc,
octave-txt-lexer.cc, main-window.cc, octave-cmd.cc,
octave-dock-widget.cc, octave-gui.cc, octave-interpreter.cc,
octave-qt-link.cc, parser.cc, webinfo.cc, resource-manager.cc,
settings-dialog.cc, shortcut-manager.cc, terminal-dock-widget.cc,
thread-manager.cc, welcome-wizard.cc, workspace-model.cc,
workspace-view.cc, build-env.in.cc, Cell.cc, __contourc__.cc,
__dispatch__.cc, __dsearchn__.cc, __ichol__.cc, __ilu__.cc,
__lin_interpn__.cc, __luinc__.cc, __magick_read__.cc,
__pchip_deriv__.cc, __qp__.cc, balance.cc, besselj.cc, betainc.cc,
bitfcns.cc, bsxfun.cc, c-file-ptr-stream.cc, c-file-ptr-stream.h,
cdisplay.c, cdisplay.h, cellfun.cc, coct-hdf5-types.c, colloc.cc,
comment-list.cc, conv2.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc,
debug.cc, defaults.cc, defaults.in.h, defun.cc, det.cc, dirfns.cc,
display.cc, dlmread.cc, dot.cc, dynamic-ld.cc, eig.cc, ellipj.cc,
error.cc, errwarn.cc, event-queue.cc, fft.cc, fft2.cc, fftn.cc,
file-io.cc, filter.cc, find.cc, ft-text-renderer.cc, gammainc.cc,
gcd.cc, getgrent.cc, getpwent.cc, getrusage.cc, givens.cc,
gl-render.cc, gl2ps-print.cc, graphics.cc, gripes.cc, hash.cc,
help.cc, hess.cc, hex2num.cc, input.cc, inv.cc, jit-ir.cc, jit-ir.h,
jit-typeinfo.cc, jit-typeinfo.h, jit-util.cc, jit-util.h, kron.cc,
load-path.cc, load-save.cc, lookup.cc, ls-ascii-helper.cc,
ls-hdf5.cc, ls-mat-ascii.cc, ls-mat4.cc, ls-mat5.cc,
ls-oct-binary.cc, ls-oct-text.cc, ls-oct-text.h, ls-utils.cc,
lsode.cc, lu.cc, mappers.cc, matrix_type.cc, max.cc, mex.cc, mex.h,
mexproto.h, mgorth.cc, nproc.cc, oct-errno.in.cc, oct-fstrm.cc,
oct-hdf5-types.cc, oct-hdf5-types.h, oct-hist.cc, oct-iostrm.cc,
oct-lvalue.cc, oct-map.cc, oct-prcstrm.cc, oct-procbuf.cc,
oct-stdstrm.h, oct-stream.cc, oct-strstrm.cc, oct-tex-lexer.in.ll,
oct-tex-parser.in.yy, octave-link.cc, ordschur.cc, pager.cc,
pinv.cc, pr-output.cc, procstream.cc, profiler.cc, psi.cc,
pt-jit.cc, pt-jit.h, quad.cc, quadcc.cc, qz.cc, rand.cc, rcond.cc,
regexp.cc, schur.cc, sighandlers.cc, sighandlers.h, siglist.c,
siglist.h, sparse-xdiv.cc, sparse-xpow.cc, sparse.cc, spparms.cc,
sqrtm.cc, str2double.cc, strfind.cc, strfns.cc, sub2ind.cc, svd.cc,
sylvester.cc, symtab.cc, syscalls.cc, sysdep.cc, text-renderer.cc,
time.cc, toplev.cc, tril.cc, tsearch.cc, txt-eng.cc, typecast.cc,
urlwrite.cc, utils.cc, variables.cc, xdiv.cc, xgl2ps.c, xnorm.cc,
xpow.cc, zfstream.cc, zfstream.h, __delaunayn__.cc, __eigs__.cc,
__fltk_uigetfile__.cc, __glpk__.cc, __init_fltk__.cc,
__init_gnuplot__.cc, __osmesa_print__.cc, __voronoi__.cc, amd.cc,
audiodevinfo.cc, audioread.cc, ccolamd.cc, chol.cc, colamd.cc,
convhulln.cc, dmperm.cc, fftw.cc, qr.cc, symbfact.cc, symrcm.cc,
liboctinterp-build-info.in.cc, mkbuiltins, mkops, ov-base.cc,
ov-bool-mat.cc, ov-bool-sparse.cc, ov-bool.cc, ov-builtin.cc,
ov-cell.cc, ov-ch-mat.cc, ov-class.cc, ov-classdef.cc, ov-colon.cc,
ov-complex.cc, ov-cs-list.cc, ov-cx-diag.cc, ov-cx-mat.cc,
ov-cx-sparse.cc, ov-dld-fcn.cc, ov-fcn-handle.cc, ov-fcn-inline.cc,
ov-fcn.cc, ov-float.cc, ov-flt-complex.cc, ov-flt-cx-diag.cc,
ov-flt-cx-mat.cc, ov-flt-re-diag.cc, ov-flt-re-mat.cc, ov-int16.cc,
ov-int32.cc, ov-int64.cc, ov-int8.cc, ov-java.cc, ov-lazy-idx.cc,
ov-mex-fcn.cc, ov-null-mat.cc, ov-oncleanup.cc, ov-perm.cc,
ov-range.cc, ov-re-diag.cc, ov-re-mat.cc, ov-re-sparse.cc,
ov-scalar.cc, ov-str-mat.cc, ov-struct.cc, ov-typeinfo.cc,
ov-uint16.cc, ov-uint32.cc, ov-uint64.cc, ov-uint8.cc,
ov-usr-fcn.cc, ov-usr-fcn.h, ov.cc, ovl.cc, octave.cc, octave.h,
op-b-b.cc, op-b-bm.cc, op-b-sbm.cc, op-bm-b.cc, op-bm-bm.cc,
op-bm-sbm.cc, op-cdm-cdm.cc, op-cdm-cm.cc, op-cdm-dm.cc,
op-cdm-m.cc, op-cell.cc, op-chm.cc, op-class.cc, op-cm-cdm.cc,
op-cm-cm.cc, op-cm-cs.cc, op-cm-dm.cc, op-cm-m.cc, op-cm-s.cc,
op-cm-scm.cc, op-cm-sm.cc, op-cs-cm.cc, op-cs-cs.cc, op-cs-m.cc,
op-cs-s.cc, op-cs-scm.cc, op-cs-sm.cc, op-dm-cdm.cc, op-dm-cm.cc,
op-dm-dm.cc, op-dm-m.cc, op-dm-scm.cc, op-dm-sm.cc,
op-dm-template.cc, op-dms-template.cc, op-double-conv.cc,
op-fcdm-fcdm.cc, op-fcdm-fcm.cc, op-fcdm-fdm.cc, op-fcdm-fm.cc,
op-fcm-fcdm.cc, op-fcm-fcm.cc, op-fcm-fcs.cc, op-fcm-fdm.cc,
op-fcm-fm.cc, op-fcm-fs.cc, op-fcn.cc, op-fcs-fcm.cc, op-fcs-fcs.cc,
op-fcs-fm.cc, op-fcs-fs.cc, op-fdm-fcdm.cc, op-fdm-fcm.cc,
op-fdm-fdm.cc, op-fdm-fm.cc, op-float-conv.cc, op-fm-fcdm.cc,
op-fm-fcm.cc, op-fm-fcs.cc, op-fm-fdm.cc, op-fm-fm.cc, op-fm-fs.cc,
op-fs-fcm.cc, op-fs-fcs.cc, op-fs-fm.cc, op-fs-fs.cc, op-i16-i16.cc,
op-i32-i32.cc, op-i64-i64.cc, op-i8-i8.cc, op-int-concat.cc,
op-int-conv.cc, op-m-cdm.cc, op-m-cm.cc, op-m-cs.cc, op-m-dm.cc,
op-m-m.cc, op-m-s.cc, op-m-scm.cc, op-m-sm.cc, op-pm-pm.cc,
op-pm-scm.cc, op-pm-sm.cc, op-pm-template.cc, op-range.cc,
op-s-cm.cc, op-s-cs.cc, op-s-m.cc, op-s-s.cc, op-s-scm.cc,
op-s-sm.cc, op-sbm-b.cc, op-sbm-bm.cc, op-sbm-sbm.cc, op-scm-cm.cc,
op-scm-cs.cc, op-scm-m.cc, op-scm-s.cc, op-scm-scm.cc, op-scm-sm.cc,
op-sm-cm.cc, op-sm-cs.cc, op-sm-m.cc, op-sm-s.cc, op-sm-scm.cc,
op-sm-sm.cc, op-str-m.cc, op-str-s.cc, op-str-str.cc, op-struct.cc,
op-ui16-ui16.cc, op-ui32-ui32.cc, op-ui64-ui64.cc, op-ui8-ui8.cc,
lex.ll, oct-parse.in.yy, pt-arg-list.cc, pt-array-list.cc,
pt-assign.cc, pt-binop.cc, pt-bp.cc, pt-cbinop.cc, pt-cell.cc,
pt-check.cc, pt-classdef.cc, pt-cmd.cc, pt-colon.cc, pt-const.cc,
pt-decl.cc, pt-eval.cc, pt-except.cc, pt-exp.cc, pt-fcn-handle.cc,
pt-funcall.cc, pt-id.cc, pt-idx.cc, pt-jump.cc, pt-loop.cc,
pt-loop.h, pt-mat.cc, pt-misc.cc, pt-pr-code.cc, pt-select.cc,
pt-stmt.cc, pt-unop.cc, pt.cc, token.cc, Array-jit.cc, Array-tc.cc,
version.cc, Array-C.cc, Array-b.cc, Array-ch.cc, Array-d.cc,
Array-f.cc, Array-fC.cc, Array-i.cc, Array-idx-vec.cc, Array-s.cc,
Array-str.cc, Array-util.cc, Array-voidp.cc, Array.cc,
CColVector.cc, CDiagMatrix.cc, CMatrix.cc, CNDArray.cc,
CRowVector.cc, CSparse.cc, MArray-C.cc, MArray-d.cc, MArray-f.cc,
MArray-fC.cc, MArray-i.cc, MArray-s.cc, MSparse-C.cc, MSparse-d.cc,
MatrixType.cc, PermMatrix.cc, Range.cc, Sparse-C.cc, Sparse-b.cc,
Sparse-d.cc, boolMatrix.cc, boolNDArray.cc, boolSparse.cc,
chMatrix.cc, chNDArray.cc, dColVector.cc, dDiagMatrix.cc,
dMatrix.cc, dNDArray.cc, dRowVector.cc, dSparse.cc, dim-vector.cc,
dim-vector.h, fCColVector.cc, fCDiagMatrix.cc, fCMatrix.cc,
fCNDArray.cc, fCRowVector.cc, fColVector.cc, fDiagMatrix.cc,
fMatrix.cc, fNDArray.cc, fRowVector.cc, idx-vector.cc,
int16NDArray.cc, int32NDArray.cc, int64NDArray.cc, int8NDArray.cc,
uint16NDArray.cc, uint32NDArray.cc, uint64NDArray.cc,
uint8NDArray.cc, Faddeeva.cc, blaswrap.c, cquit.c, f77-extern.cc,
f77-fcn.c, f77-fcn.h, lo-error.c, lo-error.h, quit.cc, quit.h,
liboctave-build-info.in.cc, CollocWt.cc, DASPK.cc, DASRT.cc,
DASSL.cc, EIG.cc, LSODE.cc, ODES.cc, Quad.cc, aepbalance.cc,
chol.cc, eigs-base.cc, fEIG.cc, gepbalance.cc, hess.cc,
lo-mappers.cc, lo-specfun.cc, lu.cc, oct-convn.cc, oct-fftw.cc,
oct-norm.cc, oct-rand.cc, oct-spparms.cc, qr.cc, qrp.cc,
randmtzig.cc, randpoisson.cc, schur.cc, sparse-chol.cc,
sparse-dmsolve.cc, sparse-lu.cc, sparse-qr.cc, svd.cc, mk-ops.awk,
mx-defs.h, dir-ops.cc, file-ops.cc, file-stat.cc, lo-sysdep.cc,
mach-info.cc, oct-env.cc, oct-group.cc, oct-passwd.cc,
oct-syscalls.cc, oct-time.cc, oct-uname.cc, pathlen.h, syswait.h,
cmd-edit.cc, cmd-hist.cc, data-conv.cc, f2c-main.c, glob-match.cc,
kpse.cc, lo-array-errwarn.cc, lo-array-gripes.cc, lo-cutils.c,
lo-cutils.h, lo-ieee.cc, lo-ieee.h, lo-regexp.cc, lo-utils.cc,
oct-base64.cc, oct-glob.cc, oct-inttypes.cc, oct-inttypes.h,
oct-locbuf.cc, oct-mutex.cc, oct-rl-edit.c, oct-rl-edit.h,
oct-rl-hist.c, oct-rl-hist.h, oct-shlib.cc, oct-sort.cc,
pathsearch.cc, singleton-cleanup.cc, sparse-sort.cc, sparse-util.cc,
statdefs.h, str-vec.cc, unwind-prot.cc, url-transfer.cc,
acinclude.m4, display-available.c, display-available.h, main-cli.cc,
main-gui.cc, main.in.cc, mkoctfile.in.cc, octave-build-info.in.cc,
octave-config.in.cc, shared-fcns.h:
Use "#if ..." consistently instead of "#ifdef" and "#ifndef".
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 17 May 2016 12:09:30 -0400 |
parents | 46f059de4dce |
children | e0da98857c19 |
line wrap: on
line source
/* Copyright (C) 1993-2015 John W. Eaton This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <cstdlib> #include <iostream> #include <new> #include <sys/types.h> #include <unistd.h> #include "cmd-edit.h" #include "oct-syscalls.h" #include "quit.h" #include "singleton-cleanup.h" #include "debug.h" #include "defun.h" #include "error.h" #include "input.h" #include "load-save.h" #include "oct-map.h" #include "pager.h" #include "pt-bp.h" #include "pt-eval.h" #include "sighandlers.h" #include "siglist.h" #include "sysdep.h" #include "syswait.h" #include "toplev.h" #include "utils.h" #include "variables.h" // Nonzero means we have already printed a message for this series of // SIGPIPES. We assume that the writer will eventually give up. int pipe_handler_error_count = 0; // TRUE means we can be interrupted. bool can_interrupt = false; // TRUE means we should try to enter the debugger on SIGINT. bool Vdebug_on_interrupt = false; // Allow users to avoid writing octave-workspace for SIGHUP (sent by // closing gnome-terminal, for example). Note that this variable has // no effect if Vcrash_dumps_octave_core is FALSE. static bool Vsighup_dumps_octave_core = true; // Similar to Vsighup_dumps_octave_core, but for SIGTERM signal. static bool Vsigterm_dumps_octave_core = true; // List of signals we have caught since last call to octave_signal_handler. static bool octave_signals_caught[NSIG]; // Forward declaration. static void user_abort (const char *sig_name, int sig_number); #if defined (__WIN32__) && ! defined (__CYGWIN__) #define WIN32_LEAN_AND_MEAN #include <windows.h> class w32_interrupt_manager { public: ~w32_interrupt_manager (void) { if (thread) CloseHandle (thread); } static bool init (void) { return instance_ok (); } static void octave_jump_to_enclosing_context (void) { if (instance_ok ()) instance->do_octave_jump_to_enclosing_context (); } static void user_abort (const char *sig_name, int sig_number) { if (instance_ok ()) instance->do_user_abort (sig_name, sig_number); } static void raise_sigint (void) { if (instance_ok ()) instance->do_raise_sigint (); } private: w32_interrupt_manager (void) : thread (0), thread_id (0) { thread_id = GetCurrentThreadId (); DuplicateHandle (GetCurrentProcess (), GetCurrentThread (), GetCurrentProcess (), &thread, 0, FALSE, DUPLICATE_SAME_ACCESS); } static void octave_jump_to_enclosing_context_sync (void) { #if defined (_MSC_VER) _fpreset (); #endif ::octave_jump_to_enclosing_context (); } void do_octave_jump_to_enclosing_context (void) { bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); if (is_interrupt_thread) octave_jump_to_enclosing_context_sync (); else { // 64-bit Windows does not appear to have threadContext.Eip. // Something else must be done here to allow interrupts to // properly work across threads. #if ! (defined (__MINGW64__) || defined (_WIN64)) CONTEXT threadContext; SuspendThread (thread); threadContext.ContextFlags = CONTEXT_CONTROL; GetThreadContext (thread, &threadContext); threadContext.Eip = (DWORD) octave_jump_to_enclosing_context_sync; SetThreadContext (thread, &threadContext); ResumeThread (thread); #endif } } void do_user_abort (const char *sig_name, int sig_number) { bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); if (is_interrupt_thread) ::user_abort (sig_name, sig_number); else { SuspendThread (thread); ::user_abort (sig_name, sig_number); ResumeThread (thread); } } void do_raise_sigint (void) { bool is_interrupt_thread = (GetCurrentThreadId () == thread_id); if (is_interrupt_thread) ::raise (SIGINT); else { SuspendThread (thread); ::raise (SIGINT); ResumeThread (thread); } } static bool instance_ok (void) { bool retval = true; if (! instance) { instance = new w32_interrupt_manager (); if (instance) singleton_cleanup_list::add (cleanup_instance); } if (! instance) error ("unable to create w32_interrupt_manager"); return retval; } static void cleanup_instance (void) { delete instance; instance = 0; } private: // A handle to the thread that is running the octave interpreter. HANDLE thread; // The ID of the thread that is running the octave interpreter. DWORD thread_id; static w32_interrupt_manager* instance; }; w32_interrupt_manager* w32_interrupt_manager::instance = 0; void w32_raise_sigint (void) { w32_interrupt_manager::raise_sigint (); } #endif // Signal handler return type. #if ! defined (BADSIG) # define BADSIG (void (*)(int))-1 #endif // The following is a workaround for an apparent bug in GCC 4.1.2 and // possibly earlier versions. See Octave bug report #30685 for details. #if defined (__GNUC__) # if ! (__GNUC__ > 4 \ || (__GNUC__ == 4 && (__GNUC_MINOR__ > 1 \ || (__GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ > 2)))) # undef GNULIB_NAMESPACE # define GNULIB_NAMESPACE # warning "disabling GNULIB_NAMESPACE for signal functions -- consider upgrading to a current version of GCC" # endif #endif #define BLOCK_SIGNAL(sig, nvar, ovar) \ do \ { \ GNULIB_NAMESPACE::sigemptyset (&nvar); \ GNULIB_NAMESPACE::sigaddset (&nvar, sig); \ GNULIB_NAMESPACE::sigemptyset (&ovar); \ GNULIB_NAMESPACE::sigprocmask (SIG_BLOCK, &nvar, &ovar); \ } \ while (0) #if ! defined (SIGCHLD) && defined (SIGCLD) # define SIGCHLD SIGCLD #endif #define BLOCK_CHILD(nvar, ovar) BLOCK_SIGNAL (SIGCHLD, nvar, ovar) #define UNBLOCK_CHILD(ovar) GNULIB_NAMESPACE::sigprocmask (SIG_SETMASK, &ovar, 0) // Called from octave_quit () to actually do something about the signals // we have caught. void octave_signal_handler (void) { // The list of signals is relatively short, so we will just go // linearly through the list. for (int i = 0; i < NSIG; i++) { if (octave_signals_caught[i]) { octave_signals_caught[i] = false; switch (i) { #if defined (SIGCHLD) case SIGCHLD: { volatile octave_interrupt_handler saved_interrupt_handler = octave_ignore_interrupts (); sigset_t set, oset; BLOCK_CHILD (set, oset); octave_child_list::wait (); octave_set_interrupt_handler (saved_interrupt_handler); UNBLOCK_CHILD (oset); octave_child_list::reap (); } break; #endif case SIGFPE: std::cerr << "warning: floating point exception" << std::endl; break; #if defined (SIGPIPE) case SIGPIPE: std::cerr << "warning: broken pipe" << std::endl; break; #endif } } } } static void my_friendly_exit (const char *sig_name, int sig_number, bool save_vars = true) { static bool been_there_done_that = false; if (been_there_done_that) { #if defined (SIGABRT) octave_set_signal_handler (SIGABRT, SIG_DFL); #endif std::cerr << "panic: attempted clean up apparently failed -- aborting...\n"; MINGW_SIGNAL_CLEANUP (); abort (); } else { been_there_done_that = true; std::cerr << "panic: " << sig_name << " -- stopping myself...\n"; if (save_vars) dump_octave_core (); if (sig_number < 0) { MINGW_SIGNAL_CLEANUP (); exit (1); } else { octave_set_signal_handler (sig_number, SIG_DFL); GNULIB_NAMESPACE::raise (sig_number); } } } sig_handler * octave_set_signal_handler (int sig, sig_handler *handler, bool restart_syscalls) { struct sigaction act, oact; act.sa_handler = handler; act.sa_flags = 0; #if defined (SIGALRM) if (sig == SIGALRM) { # if defined (SA_INTERRUPT) act.sa_flags |= SA_INTERRUPT; # endif } #endif #if defined (SA_RESTART) # if defined (SIGALRM) else # endif // FIXME: Do we also need to explicitly disable SA_RESTART? if (restart_syscalls) act.sa_flags |= SA_RESTART; #endif GNULIB_NAMESPACE::sigemptyset (&act.sa_mask); GNULIB_NAMESPACE::sigemptyset (&oact.sa_mask); GNULIB_NAMESPACE::sigaction (sig, &act, &oact); return oact.sa_handler; } static void generic_sig_handler (int sig) { my_friendly_exit (strsignal (sig), sig); } // Handle SIGCHLD. #if defined (SIGCHLD) static void sigchld_handler (int /* sig */) { octave_signal_caught = 1; octave_signals_caught[SIGCHLD] = true; } #endif #if defined (SIGFPE) && defined (__alpha__) static void sigfpe_handler (int /* sig */) { if (can_interrupt && octave_interrupt_state >= 0) { octave_signal_caught = 1; octave_signals_caught[SIGFPE] = true; octave_interrupt_state++; } } #endif #if defined (SIGHUP) || defined (SIGTERM) static void sig_hup_or_term_handler (int sig) { switch (sig) { #if defined (SIGHUP) case SIGHUP: { if (Vsighup_dumps_octave_core) dump_octave_core (); } break; #endif #if defined (SIGTERM) case SIGTERM: { if (Vsigterm_dumps_octave_core) dump_octave_core (); } break; #endif default: break; } clean_up_and_exit (0); } #endif #if 0 # if defined (SIGWINCH) static void sigwinch_handler (int /* sig */) { command_editor::resize_terminal (); } #endif #endif // Handle SIGINT by restarting the parser (see octave.cc). // // This also has to work for SIGBREAK (on systems that have it), so we // use the value of sig, instead of just assuming that it is called // for SIGINT only. static void user_abort (const char *sig_name, int sig_number) { if (! octave_initialized) exit (1); if (can_interrupt) { if (Vdebug_on_interrupt) { if (! octave_debug_on_interrupt_state) { tree_evaluator::debug_mode = true; octave_debug_on_interrupt_state = true; return; } else { // Clear the flag and do normal interrupt stuff. tree_evaluator::debug_mode = bp_table::have_breakpoints () || Vdebugging; octave_debug_on_interrupt_state = false; } } if (octave_interrupt_immediately) { if (octave_interrupt_state == 0) octave_interrupt_state = 1; #if defined (__WIN32__) && ! defined (__CYGWIN__) w32_interrupt_manager::octave_jump_to_enclosing_context (); #else octave_jump_to_enclosing_context (); #endif } else { // If we are already cleaning up from a previous interrupt, // take note of the fact that another interrupt signal has // arrived. if (octave_interrupt_state < 0) octave_interrupt_state = 0; octave_signal_caught = 1; octave_interrupt_state++; if (interactive && ! forced_interactive && octave_interrupt_state == 2) std::cerr << "Press Control-C again to abort." << std::endl; if (octave_interrupt_state >= 3) my_friendly_exit (sig_name, sig_number, true); } } } static void sigint_handler (int sig) { #if defined (__WIN32__) && ! defined (__CYGWIN__) w32_interrupt_manager::user_abort (strsignal (sig), sig); #else user_abort (strsignal (sig), sig); #endif } #if defined (SIGPIPE) static void sigpipe_handler (int /* sig */) { octave_signal_caught = 1; octave_signals_caught[SIGPIPE] = true; // Don't loop forever on account of this. if (pipe_handler_error_count++ > 100 && octave_interrupt_state >= 0) octave_interrupt_state++; } #endif octave_interrupt_handler octave_catch_interrupts (void) { octave_interrupt_handler retval; #if defined (__WIN32__) && ! defined (__CYGWIN__) w32_interrupt_manager::init (); #endif #if defined (SIGINT) retval.int_handler = octave_set_signal_handler (SIGINT, sigint_handler); #endif #if defined (SIGBREAK) retval.brk_handler = octave_set_signal_handler (SIGBREAK, sigint_handler); #endif return retval; } octave_interrupt_handler octave_ignore_interrupts (void) { octave_interrupt_handler retval; #if defined (__WIN32__) && ! defined (__CYGWIN__) w32_interrupt_manager::init (); #endif #if defined (SIGINT) retval.int_handler = octave_set_signal_handler (SIGINT, SIG_IGN); #endif #if defined (SIGBREAK) retval.brk_handler = octave_set_signal_handler (SIGBREAK, SIG_IGN); #endif return retval; } octave_interrupt_handler octave_set_interrupt_handler (const volatile octave_interrupt_handler& h, bool restart_syscalls) { octave_interrupt_handler retval; #if defined (__WIN32__) && ! defined (__CYGWIN__) w32_interrupt_manager::init (); #endif #if defined (SIGINT) retval.int_handler = octave_set_signal_handler (SIGINT, h.int_handler, restart_syscalls); #endif #if defined (SIGBREAK) retval.brk_handler = octave_set_signal_handler (SIGBREAK, h.brk_handler, restart_syscalls); #endif return retval; } // Install all the handlers for the signals we might care about. void install_signal_handlers (void) { for (int i = 0; i < NSIG; i++) octave_signals_caught[i] = false; octave_catch_interrupts (); #if defined (SIGABRT) octave_set_signal_handler (SIGABRT, generic_sig_handler); #endif #if defined (SIGALRM) octave_set_signal_handler (SIGALRM, generic_sig_handler); #endif #if defined (SIGBUS) octave_set_signal_handler (SIGBUS, generic_sig_handler); #endif #if defined (SIGCHLD) octave_set_signal_handler (SIGCHLD, sigchld_handler); #endif // SIGCLD // SIGCONT #if defined (SIGEMT) octave_set_signal_handler (SIGEMT, generic_sig_handler); #endif #if defined (SIGFPE) # if defined (__alpha__) octave_set_signal_handler (SIGFPE, sigfpe_handler); # else octave_set_signal_handler (SIGFPE, generic_sig_handler); # endif #endif #if defined (SIGHUP) octave_set_signal_handler (SIGHUP, sig_hup_or_term_handler); #endif #if defined (SIGILL) octave_set_signal_handler (SIGILL, generic_sig_handler); #endif // SIGINFO // SIGINT #if defined (SIGIOT) octave_set_signal_handler (SIGIOT, generic_sig_handler); #endif #if defined (SIGLOST) octave_set_signal_handler (SIGLOST, generic_sig_handler); #endif #if defined (SIGPIPE) octave_set_signal_handler (SIGPIPE, sigpipe_handler); #endif #if defined (SIGPOLL) octave_set_signal_handler (SIGPOLL, SIG_IGN); #endif // SIGPROF // SIGPWR #if defined (SIGQUIT) octave_set_signal_handler (SIGQUIT, generic_sig_handler); #endif #if defined (SIGSEGV) octave_set_signal_handler (SIGSEGV, generic_sig_handler); #endif // SIGSTOP #if defined (SIGSYS) octave_set_signal_handler (SIGSYS, generic_sig_handler); #endif #if defined (SIGTERM) octave_set_signal_handler (SIGTERM, sig_hup_or_term_handler); #endif #if defined (SIGTRAP) octave_set_signal_handler (SIGTRAP, generic_sig_handler); #endif // SIGTSTP // SIGTTIN // SIGTTOU // SIGURG #if defined (SIGUSR1) octave_set_signal_handler (SIGUSR1, generic_sig_handler); #endif #if defined (SIGUSR2) octave_set_signal_handler (SIGUSR2, generic_sig_handler); #endif #if defined (SIGVTALRM) octave_set_signal_handler (SIGVTALRM, generic_sig_handler); #endif #if defined (SIGIO) octave_set_signal_handler (SIGIO, SIG_IGN); #endif #if 0 # if defined (SIGWINCH) octave_set_signal_handler (SIGWINCH, sigwinch_handler); #endif #endif #if defined (SIGXCPU) octave_set_signal_handler (SIGXCPU, generic_sig_handler); #endif #if defined (SIGXFSZ) octave_set_signal_handler (SIGXFSZ, generic_sig_handler); #endif } static octave_scalar_map make_sig_struct (void) { octave_scalar_map m; #if defined (SIGABRT) m.assign ("ABRT", SIGABRT); #endif #if defined (SIGALRM) m.assign ("ALRM", SIGALRM); #endif #if defined (SIGBUS) m.assign ("BUS", SIGBUS); #endif #if defined (SIGCHLD) m.assign ("CHLD", SIGCHLD); #endif #if defined (SIGCLD) m.assign ("CLD", SIGCLD); #endif #if defined (SIGCONT) m.assign ("CONT", SIGCONT); #endif #if defined (SIGEMT) m.assign ("EMT", SIGEMT); #endif #if defined (SIGFPE) m.assign ("FPE", SIGFPE); #endif #if defined (SIGHUP) m.assign ("HUP", SIGHUP); #endif #if defined (SIGILL) m.assign ("ILL", SIGILL); #endif #if defined (SIGINFO) m.assign ("INFO", SIGINFO); #endif #if defined (SIGINT) m.assign ("INT", SIGINT); #endif #if defined (SIGIO) m.assign ("IO", SIGIO); #endif #if defined (SIGIOT) m.assign ("IOT", SIGIOT); #endif #if defined (SIGKILL) m.assign ("KILL", SIGKILL); #endif #if defined (SIGLOST) m.assign ("LOST", SIGLOST); #endif #if defined (SIGPIPE) m.assign ("PIPE", SIGPIPE); #endif #if defined (SIGPOLL) m.assign ("POLL", SIGPOLL); #endif #if defined (SIGPROF) m.assign ("PROF", SIGPROF); #endif #if defined (SIGPWR) m.assign ("PWR", SIGPWR); #endif #if defined (SIGQUIT) m.assign ("QUIT", SIGQUIT); #endif #if defined (SIGSEGV) m.assign ("SEGV", SIGSEGV); #endif #if defined (SIGSTKFLT) m.assign ("STKFLT", SIGSTKFLT); #endif #if defined (SIGSTOP) m.assign ("STOP", SIGSTOP); #endif #if defined (SIGSYS) m.assign ("SYS", SIGSYS); #endif #if defined (SIGTERM) m.assign ("TERM", SIGTERM); #endif #if defined (SIGTRAP) m.assign ("TRAP", SIGTRAP); #endif #if defined (SIGTSTP) m.assign ("TSTP", SIGTSTP); #endif #if defined (SIGTTIN) m.assign ("TTIN", SIGTTIN); #endif #if defined (SIGTTOU) m.assign ("TTOU", SIGTTOU); #endif #if defined (SIGUNUSED) m.assign ("UNUSED", SIGUNUSED); #endif #if defined (SIGURG) m.assign ("URG", SIGURG); #endif #if defined (SIGUSR1) m.assign ("USR1", SIGUSR1); #endif #if defined (SIGUSR2) m.assign ("USR2", SIGUSR2); #endif #if defined (SIGVTALRM) m.assign ("VTALRM", SIGVTALRM); #endif #if defined (SIGWINCH) m.assign ("WINCH", SIGWINCH); #endif #if defined (SIGXCPU) m.assign ("XCPU", SIGXCPU); #endif #if defined (SIGXFSZ) m.assign ("XFSZ", SIGXFSZ); #endif return m; } octave_child_list::octave_child_list_rep *octave_child_list::instance = 0; bool octave_child_list::instance_ok (void) { bool retval = true; if (! instance) { instance = new octave_child_list_rep (); if (instance) singleton_cleanup_list::add (cleanup_instance); } if (! instance) error ("unable to create child list object!"); return retval; } void octave_child_list::insert (pid_t pid, octave_child::child_event_handler f) { if (instance_ok ()) instance->insert (pid, f); } void octave_child_list::reap (void) { if (instance_ok ()) instance->reap (); } bool octave_child_list::wait (void) { return (instance_ok ()) ? instance->wait () : false; } class pid_equal { public: pid_equal (pid_t v) : val (v) { } bool operator () (const octave_child& oc) const { return oc.pid == val; } private: pid_t val; }; void octave_child_list::remove (pid_t pid) { if (instance_ok ()) instance->remove_if (pid_equal (pid)); } #define OCL_REP octave_child_list::octave_child_list_rep void OCL_REP::insert (pid_t pid, octave_child::child_event_handler f) { append (octave_child (pid, f)); } void OCL_REP::reap (void) { // Mark the record for PID invalid. for (iterator p = begin (); p != end (); p++) { // The call to the octave_child::child_event_handler might // invalidate the iterator (for example, by calling // octave_child_list::remove), so we increment the iterator // here. octave_child& oc = *p; if (oc.have_status) { oc.have_status = 0; octave_child::child_event_handler f = oc.handler; if (f && f (oc.pid, oc.status)) oc.pid = -1; } } remove_if (pid_equal (-1)); } // Wait on our children and record any changes in their status. bool OCL_REP::wait (void) { bool retval = false; for (iterator p = begin (); p != end (); p++) { octave_child& oc = *p; pid_t pid = oc.pid; if (pid > 0) { int status; if (octave::syscalls::waitpid (pid, &status, WNOHANG) > 0) { oc.have_status = 1; oc.status = status; retval = true; break; } } } return retval; } DEFUN (SIG, args, , "-*- texinfo -*-\n\ @deftypefn {} {} SIG ()\n\ Return a structure containing Unix signal names and their defined values.\n\ @end deftypefn") { if (args.length () != 0) print_usage (); static octave_scalar_map m = make_sig_struct (); return ovl (m); } /* %!assert (isstruct (SIG ())) %!assert (! isempty (SIG ())) %!error SIG (1) */ DEFUN (debug_on_interrupt, args, nargout, "-*- texinfo -*-\n\ @deftypefn {} {@var{val} =} debug_on_interrupt ()\n\ @deftypefnx {} {@var{old_val} =} debug_on_interrupt (@var{new_val})\n\ @deftypefnx {} {} debug_on_interrupt (@var{new_val}, \"local\")\n\ Query or set the internal variable that controls whether Octave will try\n\ to enter debugging mode when it receives an interrupt signal (typically\n\ generated with @kbd{C-c}).\n\ \n\ If a second interrupt signal is received before reaching the debugging mode,\n\ a normal interrupt will occur.\n\ \n\ When called from inside a function with the @qcode{\"local\"} option, the\n\ variable is changed locally for the function and any subroutines it calls.\n\ The original variable value is restored when exiting the function.\n\ @seealso{debug_on_error, debug_on_warning}\n\ @end deftypefn") { return SET_INTERNAL_VARIABLE (debug_on_interrupt); } /* %!test %! orig_val = debug_on_interrupt (); %! old_val = debug_on_interrupt (! orig_val); %! assert (orig_val, old_val); %! assert (debug_on_interrupt (), ! orig_val); %! debug_on_interrupt (orig_val); %! assert (debug_on_interrupt (), orig_val); %!error (debug_on_interrupt (1, 2)) */ DEFUN (sighup_dumps_octave_core, args, nargout, "-*- texinfo -*-\n\ @deftypefn {} {@var{val} =} sighup_dumps_octave_core ()\n\ @deftypefnx {} {@var{old_val} =} sighup_dumps_octave_core (@var{new_val})\n\ @deftypefnx {} {} sighup_dumps_octave_core (@var{new_val}, \"local\")\n\ Query or set the internal variable that controls whether Octave tries\n\ to save all current variables to the file @file{octave-workspace} if it\n\ receives a hangup signal.\n\ \n\ When called from inside a function with the @qcode{\"local\"} option, the\n\ variable is changed locally for the function and any subroutines it calls.\n\ The original variable value is restored when exiting the function.\n\ @end deftypefn") { return SET_INTERNAL_VARIABLE (sighup_dumps_octave_core); } /* %!test %! orig_val = sighup_dumps_octave_core (); %! old_val = sighup_dumps_octave_core (! orig_val); %! assert (orig_val, old_val); %! assert (sighup_dumps_octave_core (), ! orig_val); %! sighup_dumps_octave_core (orig_val); %! assert (sighup_dumps_octave_core (), orig_val); %!error (sighup_dumps_octave_core (1, 2)) */ DEFUN (sigterm_dumps_octave_core, args, nargout, "-*- texinfo -*-\n\ @deftypefn {} {@var{val} =} sigterm_dumps_octave_core ()\n\ @deftypefnx {} {@var{old_val} =} sigterm_dumps_octave_core (@var{new_val})\n\ @deftypefnx {} {} sigterm_dumps_octave_core (@var{new_val}, \"local\")\n\ Query or set the internal variable that controls whether Octave tries\n\ to save all current variables to the file @file{octave-workspace} if it\n\ receives a terminate signal.\n\ \n\ When called from inside a function with the @qcode{\"local\"} option, the\n\ variable is changed locally for the function and any subroutines it calls.\n\ The original variable value is restored when exiting the function.\n\ @end deftypefn") { return SET_INTERNAL_VARIABLE (sigterm_dumps_octave_core); } /* %!test %! orig_val = sigterm_dumps_octave_core (); %! old_val = sigterm_dumps_octave_core (! orig_val); %! assert (orig_val, old_val); %! assert (sigterm_dumps_octave_core (), ! orig_val); %! sigterm_dumps_octave_core (orig_val); %! assert (sigterm_dumps_octave_core (), orig_val); %!error (sigterm_dumps_octave_core (1, 2)) */