line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
|
|
|
|
|
|
|
# emulate default behaviors for the various signals. |
2
|
|
|
|
|
|
|
|
3
|
|
|
|
|
|
|
package Signals::XSIG::Default; |
4
|
|
|
|
|
|
|
|
5
|
|
|
|
|
|
|
## no critic (RequireLocalizedPunctuationVars) |
6
|
|
|
|
|
|
|
|
7
|
12
|
|
|
12
|
|
115
|
use strict; |
|
12
|
|
|
|
|
20
|
|
|
12
|
|
|
|
|
293
|
|
8
|
12
|
|
|
12
|
|
50
|
use warnings; |
|
12
|
|
|
|
|
15
|
|
|
12
|
|
|
|
|
331
|
|
9
|
12
|
|
|
12
|
|
55
|
use Config; |
|
12
|
|
|
|
|
19
|
|
|
12
|
|
|
|
|
630
|
|
10
|
12
|
|
|
12
|
|
67
|
use Carp; |
|
12
|
|
|
|
|
28
|
|
|
12
|
|
|
|
|
901
|
|
11
|
12
|
|
|
12
|
|
4935
|
use POSIX (); |
|
12
|
|
|
|
|
76827
|
|
|
12
|
|
|
|
|
283
|
|
12
|
12
|
|
|
12
|
|
59
|
use Exporter; |
|
12
|
|
|
|
|
18
|
|
|
12
|
|
|
|
|
4004
|
|
13
|
|
|
|
|
|
|
|
14
|
|
|
|
|
|
|
our @ISA = qw(Exporter); |
15
|
|
|
|
|
|
|
our @EXPORT = qw(%DEFAULT_BEHAVIOR); |
16
|
|
|
|
|
|
|
|
17
|
|
|
|
|
|
|
our %DEFAULT_BEHAVIOR; |
18
|
|
|
|
|
|
|
our $VERSION = '0.16'; |
19
|
|
|
|
|
|
|
|
20
|
|
|
|
|
|
|
my @snam = split ' ', $Config{sig_name}; |
21
|
|
|
|
|
|
|
my @snum = split ' ', $Config{sig_num}; |
22
|
|
|
|
|
|
|
|
23
|
|
|
|
|
|
|
sub import { |
24
|
12
|
|
|
12
|
|
20
|
my $ignore = 1; |
25
|
12
|
|
|
|
|
56
|
while () { |
26
|
3480
|
100
|
|
|
|
5242
|
next if /^#/; |
27
|
3408
|
100
|
|
|
|
6316
|
next unless /\S/; |
28
|
3228
|
100
|
|
|
|
8914
|
if (/^\[(.+)\]/) { |
|
|
50
|
|
|
|
|
|
|
|
100
|
|
|
|
|
|
29
|
192
|
100
|
100
|
|
|
1013
|
if ($1 eq 'default' || $1 eq $^O) { |
30
|
24
|
|
|
|
|
137
|
$ignore = 0; |
31
|
|
|
|
|
|
|
} else { |
32
|
168
|
|
|
|
|
434
|
$ignore = 1; |
33
|
|
|
|
|
|
|
} |
34
|
|
|
|
|
|
|
} elsif (/\{(.+)\/(\d+)\}/) { |
35
|
0
|
0
|
0
|
|
|
0
|
if ($1 eq $^O && $2 <= int($] * 1000)) { |
36
|
0
|
|
|
|
|
0
|
$ignore = 0; |
37
|
|
|
|
|
|
|
} else { |
38
|
0
|
|
|
|
|
0
|
$ignore = 1; |
39
|
|
|
|
|
|
|
} |
40
|
|
|
|
|
|
|
} elsif (!$ignore) { |
41
|
984
|
|
|
|
|
1143
|
s/^\d+\. //; |
42
|
984
|
|
|
|
|
988
|
s/^SIG//; |
43
|
984
|
|
|
|
|
2934
|
my ($sig, $num, $behavior) = /^(\w+)\s+\[(\d*)\]\s+=>\s+(.+)/; |
44
|
984
|
50
|
|
|
|
1560
|
if (defined $sig) { |
45
|
984
|
|
|
|
|
2457
|
$DEFAULT_BEHAVIOR{$sig} = $behavior; |
46
|
|
|
|
|
|
|
} |
47
|
|
|
|
|
|
|
} |
48
|
|
|
|
|
|
|
} |
49
|
12
|
50
|
|
|
|
54
|
if ($ENV{SIGNALS_XSIG_DUMP}) { |
50
|
12
|
|
|
12
|
|
6118
|
use Data::Dumper; |
|
12
|
|
|
|
|
66998
|
|
|
12
|
|
|
|
|
1404
|
|
51
|
0
|
|
|
|
|
0
|
print STDERR Dumper(\%DEFAULT_BEHAVIOR),"\n"; |
52
|
|
|
|
|
|
|
} |
53
|
12
|
|
|
|
|
293
|
return; |
54
|
|
|
|
|
|
|
} |
55
|
|
|
|
|
|
|
|
56
|
|
|
|
|
|
|
sub perform_default_behavior { |
57
|
4
|
|
|
4
|
0
|
8
|
my ($signal, @args) = @_; |
58
|
|
|
|
|
|
|
|
59
|
4
|
|
|
|
|
8
|
my $funcname = 'default_SIG' . $signal; |
60
|
4
|
50
|
|
|
|
20
|
if (defined &$funcname) { |
61
|
12
|
|
|
12
|
|
73
|
no strict 'refs'; ## no critic (NoStrict) |
|
12
|
|
|
|
|
20
|
|
|
12
|
|
|
|
|
5727
|
|
62
|
0
|
0
|
|
|
|
0
|
return if $funcname->($signal, @args); |
63
|
|
|
|
|
|
|
} |
64
|
|
|
|
|
|
|
|
65
|
4
|
|
|
|
|
8
|
my $behavior = $DEFAULT_BEHAVIOR{$signal}; |
66
|
4
|
50
|
|
|
|
8
|
if (!defined $behavior) { |
67
|
0
|
0
|
|
|
|
0
|
if ($signal =~ /^NUM(\d+)/) { |
68
|
0
|
|
|
|
|
0
|
my $signum = 0 + $1; |
69
|
0
|
|
|
|
|
0
|
$behavior = $DEFAULT_BEHAVIOR{"NUMxx"}; |
70
|
0
|
|
|
|
|
0
|
$behavior =~ s/xx/$signum/; |
71
|
|
|
|
|
|
|
} |
72
|
0
|
0
|
|
|
|
0
|
if (!defined $behavior) { |
73
|
0
|
|
|
|
|
0
|
croak "Signals::XSIG: no default behavior is specified ", |
74
|
|
|
|
|
|
|
"for SIG$signal. Terminating this program.\n"; |
75
|
|
|
|
|
|
|
} |
76
|
|
|
|
|
|
|
} |
77
|
|
|
|
|
|
|
|
78
|
4
|
50
|
|
|
|
20
|
if (ref($behavior) eq 'CODE') { |
79
|
4
|
50
|
|
|
|
10
|
if (defined &$behavior) { |
80
|
4
|
|
|
|
|
14
|
$behavior->($signal); |
81
|
4
|
|
|
|
|
17
|
return; |
82
|
|
|
|
|
|
|
} else { |
83
|
0
|
|
|
|
|
|
carp "Signals::XSIG: Default behavior for SIG$signal ", |
84
|
|
|
|
|
|
|
"is not set to a valid subroutine."; |
85
|
0
|
|
|
|
|
|
return; |
86
|
|
|
|
|
|
|
} |
87
|
|
|
|
|
|
|
} |
88
|
|
|
|
|
|
|
|
89
|
0
|
0
|
|
|
|
|
if ($behavior eq 'IGNORE') { |
90
|
0
|
|
|
|
|
|
return; |
91
|
|
|
|
|
|
|
} |
92
|
|
|
|
|
|
|
|
93
|
0
|
0
|
|
|
|
|
if ($behavior eq 'SUSPEND') { |
94
|
0
|
|
|
|
|
|
suspend($signal); |
95
|
|
|
|
|
|
|
# ... then wait for the SIGCONT ... |
96
|
0
|
|
|
|
|
|
return; |
97
|
|
|
|
|
|
|
} |
98
|
|
|
|
|
|
|
|
99
|
0
|
0
|
|
|
|
|
if ($behavior =~ /^ABORT/) { |
100
|
0
|
|
|
|
|
|
untie %SIG; |
101
|
0
|
|
|
|
|
|
%SIG = (); |
102
|
0
|
|
|
|
|
|
$SIG{$signal} = $SIG{"ABRT"} = "DEFAULT"; |
103
|
0
|
|
|
|
|
|
killprog_with_signal("ABRT"); |
104
|
0
|
|
|
|
|
|
POSIX::abort(); |
105
|
0
|
|
|
|
|
|
croak "Abort\n"; |
106
|
|
|
|
|
|
|
} |
107
|
0
|
0
|
|
|
|
|
if ($behavior =~ /^SIGSEGV/) { |
108
|
0
|
|
|
|
|
|
killprog_with_signal('SEGV'); |
109
|
0
|
|
|
|
|
|
croak "Abort\n"; |
110
|
|
|
|
|
|
|
} |
111
|
|
|
|
|
|
|
|
112
|
0
|
0
|
|
|
|
|
if ($behavior =~ /^EXIT (\d+)/) { |
113
|
0
|
|
|
|
|
|
my $exit_code = $1; |
114
|
0
|
|
|
|
|
|
exit($exit_code); |
115
|
|
|
|
|
|
|
} |
116
|
|
|
|
|
|
|
|
117
|
0
|
0
|
|
|
|
|
if ($behavior =~ /^TERMINATE/) { |
118
|
0
|
|
|
|
|
|
my $number; |
119
|
0
|
|
|
|
|
|
for (my $i=0; $i<@snum; $i++) { |
120
|
0
|
0
|
|
|
|
|
$number = $snum[$i] if $signal eq $snam[$i]; |
121
|
|
|
|
|
|
|
} |
122
|
|
|
|
|
|
|
|
123
|
0
|
|
|
|
|
|
killprog_with_signal($signal, $number); |
124
|
0
|
|
|
|
|
|
croak "default behavior for SIG$signal should have killed script ", |
125
|
|
|
|
|
|
|
"but for some reason it didn't :-(\n"; |
126
|
|
|
|
|
|
|
} |
127
|
|
|
|
|
|
|
|
128
|
0
|
|
|
|
|
|
croak "Signals::XSIG: unknown behavior \"$behavior\" ", |
129
|
|
|
|
|
|
|
"for SIG$signal. Terminating this program.\n"; |
130
|
|
|
|
|
|
|
} |
131
|
|
|
|
|
|
|
|
132
|
|
|
|
|
|
|
sub killprog_with_signal { |
133
|
0
|
|
|
0
|
0
|
|
my ($sig,$sig_no) = @_; |
134
|
0
|
|
|
|
|
|
untie %SIG; |
135
|
0
|
|
|
|
|
|
%SIG = (); |
136
|
0
|
|
|
|
|
|
$SIG{$sig} = 'DEFAULT'; |
137
|
|
|
|
|
|
|
|
138
|
0
|
0
|
|
|
|
|
unless ($sig_no) { |
139
|
0
|
|
|
|
|
|
my @sig_name = split ' ', $Config{sig_name}; |
140
|
0
|
|
|
|
|
|
($sig_no) = grep { $sig eq $sig_name[$_] } split ' ',$Config{sig_num}; |
|
0
|
|
|
|
|
|
|
141
|
|
|
|
|
|
|
} |
142
|
|
|
|
|
|
|
|
143
|
0
|
|
|
|
|
|
kill $sig, $$; |
144
|
0
|
0
|
|
|
|
|
sleep 1 if $^O eq 'MSWin32'; |
145
|
0
|
0
|
|
|
|
|
eval { |
146
|
12
|
|
|
12
|
|
75
|
use POSIX (); |
|
12
|
|
|
|
|
21
|
|
|
12
|
|
|
|
|
2694
|
|
147
|
0
|
0
|
|
|
|
|
if ($sig_no) { |
148
|
|
|
|
|
|
|
# this is needed for Linux |
149
|
0
|
|
|
|
|
|
POSIX::sigaction($sig_no, &POSIX::SIG_DFL); |
150
|
0
|
|
|
|
|
|
POSIX::sigprocmask(&POSIX::SIG_UNBLOCK, |
151
|
|
|
|
|
|
|
POSIX::SigSet->new($sig_no)); |
152
|
|
|
|
|
|
|
} |
153
|
|
|
|
|
|
|
} or (); |
154
|
0
|
|
|
|
|
|
kill $sig, $$; |
155
|
0
|
0
|
|
|
|
|
sleep 1 if $^O eq 'MSWin32'; |
156
|
|
|
|
|
|
|
|
157
|
0
|
|
|
|
|
|
my $miniprog = q[$SIG{'__SIGNAL__'}='DEFAULT';sleep 4; |
158
|
|
|
|
|
|
|
kill '__SIGNAL__',$$;sleep 1+"MSWin32"eq$^O;die]; |
159
|
0
|
|
|
|
|
|
$miniprog =~ s/__SIGNAL__/$sig/g; |
160
|
0
|
|
|
|
|
|
exec($^X, "-e", $miniprog); |
161
|
|
|
|
|
|
|
} |
162
|
|
|
|
|
|
|
|
163
|
|
|
|
|
|
|
# in principle, SIGSTOP cannot be trapped. |
164
|
|
|
|
|
|
|
sub suspend { |
165
|
0
|
0
|
|
0
|
0
|
|
if ($^O eq 'MSWin32') { |
166
|
|
|
|
|
|
|
# MSWin32 doesn't have signals as such. |
167
|
|
|
|
|
|
|
# Win32::API->SuspendProcess / SuspendThread ? |
168
|
|
|
|
|
|
|
# Win32::Process->suspend ? |
169
|
|
|
|
|
|
|
# Win32::Thread->suspend ? |
170
|
0
|
0
|
|
|
|
|
if ($$ > 0) { |
171
|
|
|
|
|
|
|
# suspend process |
172
|
|
|
|
|
|
|
# enumerate all threads in process |
173
|
|
|
|
|
|
|
# suspend each thread |
174
|
|
|
|
|
|
|
} else { |
175
|
|
|
|
|
|
|
# suspend thread |
176
|
|
|
|
|
|
|
} |
177
|
|
|
|
|
|
|
} |
178
|
0
|
|
|
|
|
|
return kill 'STOP', $$; |
179
|
|
|
|
|
|
|
} |
180
|
|
|
|
|
|
|
|
181
|
|
|
|
|
|
|
################################################################## |
182
|
|
|
|
|
|
|
|
183
|
|
|
|
|
|
|
# system specific and other special behaviors. |
184
|
|
|
|
|
|
|
# Signals that don't fall into the terminate/suspend/ignore |
185
|
|
|
|
|
|
|
# paradigm or that have other special needs can be implemented |
186
|
|
|
|
|
|
|
# below. |
187
|
|
|
|
|
|
|
# Return true if the signal is "handled" and no further |
188
|
|
|
|
|
|
|
# processing is necessary. |
189
|
|
|
|
|
|
|
|
190
|
|
|
|
|
|
|
sub default_SIG__WARN__ { ## no critic (Unpacking) |
191
|
0
|
|
|
0
|
0
|
|
CORE::warn @_; |
192
|
0
|
|
|
|
|
|
return 1; |
193
|
|
|
|
|
|
|
} |
194
|
|
|
|
|
|
|
|
195
|
|
|
|
|
|
|
sub default_SIG__DIE__ { ## no critic (Unpacking) |
196
|
0
|
|
|
0
|
0
|
|
CORE::die @_; |
197
|
0
|
|
|
|
|
|
return 1; |
198
|
|
|
|
|
|
|
} |
199
|
|
|
|
|
|
|
|
200
|
|
|
|
|
|
|
1; |
201
|
|
|
|
|
|
|
|
202
|
|
|
|
|
|
|
=head1 NAME |
203
|
|
|
|
|
|
|
|
204
|
|
|
|
|
|
|
Signals::XSIG::Default - enumerate/implement default unhandled signal behavior |
205
|
|
|
|
|
|
|
|
206
|
|
|
|
|
|
|
=head1 DESCRIPTION |
207
|
|
|
|
|
|
|
|
208
|
|
|
|
|
|
|
Module for emulating the default behavior for all |
209
|
|
|
|
|
|
|
signals in your system. The emulator is used when you have |
210
|
|
|
|
|
|
|
used L to register more than one |
211
|
|
|
|
|
|
|
handler for a signal, and at least one of those |
212
|
|
|
|
|
|
|
handlers is C. |
213
|
|
|
|
|
|
|
|
214
|
|
|
|
|
|
|
See L for much more information. |
215
|
|
|
|
|
|
|
|
216
|
|
|
|
|
|
|
=cut |
217
|
|
|
|
|
|
|
|
218
|
|
|
|
|
|
|
|
219
|
|
|
|
|
|
|
|
220
|
|
|
|
|
|
|
# see spike/analyze_default_signal_behavior.pl |
221
|
|
|
|
|
|
|
|
222
|
|
|
|
|
|
|
# for each new system that is available to us, run |
223
|
|
|
|
|
|
|
# spike/analyze_default_signal_behavior.pl |
224
|
|
|
|
|
|
|
# and include that data at the end of this file ... |
225
|
|
|
|
|
|
|
# |
226
|
|
|
|
|
|
|
# we can also infer behavior from CPAN tester results, |
227
|
|
|
|
|
|
|
# see t/20-defaults.t |
228
|
|
|
|
|
|
|
# |
229
|
|
|
|
|
|
|
__DATA__ |