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b1dbf716 |
1 | package # hide from PAUSE |
2 | DBIx::Class::_Util; |
3 | |
4 | use warnings; |
5 | use strict; |
6 | |
750a4ad2 |
7 | use constant SPURIOUS_VERSION_CHECK_WARNINGS => ( "$]" < 5.010 ? 1 : 0); |
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8 | |
37873f78 |
9 | BEGIN { |
10 | package # hide from pause |
11 | DBIx::Class::_ENV_; |
12 | |
13 | use Config; |
14 | |
15 | use constant { |
16 | |
17 | # but of course |
18 | BROKEN_FORK => ($^O eq 'MSWin32') ? 1 : 0, |
19 | |
750a4ad2 |
20 | BROKEN_GOTO => ( "$]" < 5.008003 ) ? 1 : 0, |
8d73fcd4 |
21 | |
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22 | HAS_ITHREADS => $Config{useithreads} ? 1 : 0, |
23 | |
69016f65 |
24 | DBICTEST => $INC{"DBICTest/Util.pm"} ? 1 : 0, |
37873f78 |
25 | |
26 | # During 5.13 dev cycle HELEMs started to leak on copy |
6cfb1d2f |
27 | # add an escape for these perls ON SMOKERS - a user will still get death |
750a4ad2 |
28 | PEEPEENESS => ( eval { DBICTest::RunMode->is_smoker } && ( "$]" >= 5.013005 and "$]" <= 5.013006) ), |
37873f78 |
29 | |
1b658919 |
30 | SHUFFLE_UNORDERED_RESULTSETS => $ENV{DBIC_SHUFFLE_UNORDERED_RESULTSETS} ? 1 : 0, |
31 | |
37873f78 |
32 | ASSERT_NO_INTERNAL_WANTARRAY => $ENV{DBIC_ASSERT_NO_INTERNAL_WANTARRAY} ? 1 : 0, |
33 | |
77c3a5dc |
34 | ASSERT_NO_INTERNAL_INDIRECT_CALLS => $ENV{DBIC_ASSERT_NO_INTERNAL_INDIRECT_CALLS} ? 1 : 0, |
35 | |
2fdeef65 |
36 | STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE => $ENV{DBIC_STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE} ? 1 : 0, |
37 | |
f45dc928 |
38 | STRESSTEST_COLUMN_INFO_UNAWARE_STORAGE => $ENV{DBIC_STRESSTEST_COLUMN_INFO_UNAWARE_STORAGE} ? 1 : 0, |
39 | |
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40 | IV_SIZE => $Config{ivsize}, |
00882d2c |
41 | |
42 | OS_NAME => $^O, |
37873f78 |
43 | }; |
44 | |
750a4ad2 |
45 | if ( "$]" < 5.009_005) { |
37873f78 |
46 | require MRO::Compat; |
47 | constant->import( OLD_MRO => 1 ); |
48 | } |
49 | else { |
50 | require mro; |
51 | constant->import( OLD_MRO => 0 ); |
52 | } |
53 | } |
54 | |
841efcb3 |
55 | # FIXME - this is not supposed to be here |
56 | # Carp::Skip to the rescue soon |
57 | use DBIx::Class::Carp '^DBIx::Class|^DBICTest'; |
58 | |
d7d45bdc |
59 | use B (); |
841efcb3 |
60 | use Carp 'croak'; |
d7d45bdc |
61 | use Storable 'nfreeze'; |
3d56e026 |
62 | use Scalar::Util qw(weaken blessed reftype refaddr); |
3705e3b2 |
63 | use List::Util qw(first); |
0020e364 |
64 | use Sub::Quote qw(qsub quote_sub); |
7f9a3f70 |
65 | |
1c30a2e4 |
66 | # Already correctly prototyped: perlbrew exec perl -MStorable -e 'warn prototype \&Storable::dclone' |
67 | BEGIN { *deep_clone = \&Storable::dclone } |
68 | |
b1dbf716 |
69 | use base 'Exporter'; |
3705e3b2 |
70 | our @EXPORT_OK = qw( |
d634850b |
71 | sigwarn_silencer modver_gt_or_eq modver_gt_or_eq_and_lt |
77c3a5dc |
72 | fail_on_internal_wantarray fail_on_internal_call |
e1d9e578 |
73 | refdesc refcount hrefaddr is_exception detected_reinvoked_destructor |
1c30a2e4 |
74 | quote_sub qsub perlstring serialize deep_clone |
facd0e8e |
75 | UNRESOLVABLE_CONDITION |
3705e3b2 |
76 | ); |
052a832c |
77 | |
facd0e8e |
78 | use constant UNRESOLVABLE_CONDITION => \ '1 = 0'; |
79 | |
bf302897 |
80 | sub sigwarn_silencer ($) { |
052a832c |
81 | my $pattern = shift; |
82 | |
83 | croak "Expecting a regexp" if ref $pattern ne 'Regexp'; |
84 | |
85 | my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) }; |
86 | |
87 | return sub { &$orig_sig_warn unless $_[0] =~ $pattern }; |
88 | } |
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89 | |
01b25f12 |
90 | sub perlstring ($) { q{"}. quotemeta( shift ). q{"} }; |
91 | |
3d56e026 |
92 | sub hrefaddr ($) { sprintf '0x%x', &refaddr||0 } |
8433421f |
93 | |
94 | sub refdesc ($) { |
95 | croak "Expecting a reference" if ! length ref $_[0]; |
96 | |
97 | # be careful not to trigger stringification, |
98 | # reuse @_ as a scratch-pad |
99 | sprintf '%s%s(0x%x)', |
100 | ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ), |
101 | reftype $_[0], |
3d56e026 |
102 | refaddr($_[0]), |
8433421f |
103 | ; |
104 | } |
bf302897 |
105 | |
106 | sub refcount ($) { |
dac7972a |
107 | croak "Expecting a reference" if ! length ref $_[0]; |
108 | |
dac7972a |
109 | # No tempvars - must operate on $_[0], otherwise the pad |
110 | # will count as an extra ref |
111 | B::svref_2object($_[0])->REFCNT; |
112 | } |
113 | |
b34d9331 |
114 | sub serialize ($) { |
b34d9331 |
115 | local $Storable::canonical = 1; |
d7d45bdc |
116 | nfreeze($_[0]); |
b34d9331 |
117 | } |
118 | |
841efcb3 |
119 | sub is_exception ($) { |
120 | my $e = $_[0]; |
121 | |
a0414138 |
122 | # this is not strictly correct - an eval setting $@ to undef |
123 | # is *not* the same as an eval setting $@ to '' |
124 | # but for the sake of simplicity assume the following for |
125 | # the time being |
126 | return 0 unless defined $e; |
127 | |
841efcb3 |
128 | my ($not_blank, $suberror); |
129 | { |
130 | local $@; |
131 | eval { |
132 | $not_blank = ($e ne '') ? 1 : 0; |
133 | 1; |
134 | } or $suberror = $@; |
135 | } |
136 | |
137 | if (defined $suberror) { |
138 | if (length (my $class = blessed($e) )) { |
139 | carp_unique( sprintf( |
9bea2000 |
140 | 'External exception class %s implements partial (broken) overloading ' |
141 | . 'preventing its instances from being used in simple ($x eq $y) ' |
841efcb3 |
142 | . 'comparisons. Given Perl\'s "globally cooperative" exception ' |
143 | . 'handling this type of brokenness is extremely dangerous on ' |
144 | . 'exception objects, as it may (and often does) result in silent ' |
145 | . '"exception substitution". DBIx::Class tries to work around this ' |
146 | . 'as much as possible, but other parts of your software stack may ' |
147 | . 'not be even aware of this. Please submit a bugreport against the ' |
148 | . 'distribution containing %s and in the meantime apply a fix similar ' |
149 | . 'to the one shown at %s, in order to ensure your exception handling ' |
150 | . 'is saner application-wide. What follows is the actual error text ' |
151 | . "as generated by Perl itself:\n\n%s\n ", |
9bea2000 |
152 | $class, |
841efcb3 |
153 | $class, |
154 | 'http://v.gd/DBIC_overload_tempfix/', |
155 | $suberror, |
156 | )); |
157 | |
158 | # workaround, keeps spice flowing |
159 | $not_blank = ("$e" ne '') ? 1 : 0; |
160 | } |
161 | else { |
162 | # not blessed yet failed the 'ne'... this makes 0 sense... |
163 | # just throw further |
164 | die $suberror |
165 | } |
166 | } |
84e4e006 |
167 | elsif ( |
168 | # a ref evaluating to '' is definitively a "null object" |
169 | ( not $not_blank ) |
170 | and |
171 | length( my $class = ref $e ) |
172 | ) { |
173 | carp_unique( sprintf( |
174 | "Objects of external exception class '%s' stringify to '' (the " |
175 | . 'empty string), implementing the so called null-object-pattern. ' |
176 | . 'Given Perl\'s "globally cooperative" exception handling using this ' |
177 | . 'class of exceptions is extremely dangerous, as it may (and often ' |
178 | . 'does) result in silent discarding of errors. DBIx::Class tries to ' |
179 | . 'work around this as much as possible, but other parts of your ' |
180 | . 'software stack may not be even aware of the problem. Please submit ' |
181 | . 'a bugreport against the distribution containing %s.', |
182 | |
183 | ($class) x 2, |
184 | )); |
185 | |
186 | $not_blank = 1; |
187 | } |
841efcb3 |
188 | |
189 | return $not_blank; |
190 | } |
191 | |
3d56e026 |
192 | { |
193 | my $destruction_registry = {}; |
194 | |
195 | sub CLONE { |
196 | $destruction_registry = { map |
197 | { defined $_ ? ( refaddr($_) => $_ ) : () } |
198 | values %$destruction_registry |
199 | }; |
200 | } |
201 | |
202 | # This is almost invariably invoked from within DESTROY |
203 | # throwing exceptions won't work |
e1d9e578 |
204 | sub detected_reinvoked_destructor { |
3d56e026 |
205 | |
206 | # quick "garbage collection" pass - prevents the registry |
207 | # from slowly growing with a bunch of undef-valued keys |
208 | defined $destruction_registry->{$_} or delete $destruction_registry->{$_} |
209 | for keys %$destruction_registry; |
210 | |
e1d9e578 |
211 | if (! length ref $_[0]) { |
212 | printf STDERR '%s() expects a blessed reference %s', |
3d56e026 |
213 | (caller(0))[3], |
214 | Carp::longmess, |
215 | ; |
216 | return undef; # don't know wtf to do |
217 | } |
e1d9e578 |
218 | elsif (! defined $destruction_registry->{ my $addr = refaddr($_[0]) } ) { |
3d56e026 |
219 | weaken( $destruction_registry->{$addr} = $_[0] ); |
220 | return 0; |
221 | } |
222 | else { |
223 | carp_unique ( sprintf ( |
224 | 'Preventing *MULTIPLE* DESTROY() invocations on %s - an *EXTREMELY ' |
225 | . 'DANGEROUS* condition which is *ALMOST CERTAINLY GLOBAL* within your ' |
226 | . 'application, affecting *ALL* classes without active protection against ' |
227 | . 'this. Diagnose and fix the root cause ASAP!!!%s', |
228 | refdesc $_[0], |
229 | ( ( $INC{'Devel/StackTrace.pm'} and ! do { local $@; eval { Devel::StackTrace->VERSION(2) } } ) |
230 | ? " (likely culprit Devel::StackTrace\@@{[ Devel::StackTrace->VERSION ]} found in %INC, http://is.gd/D_ST_refcap)" |
231 | : '' |
232 | ) |
233 | )); |
234 | |
235 | return 1; |
236 | } |
237 | } |
238 | } |
239 | |
bf302897 |
240 | sub modver_gt_or_eq ($$) { |
b1dbf716 |
241 | my ($mod, $ver) = @_; |
242 | |
243 | croak "Nonsensical module name supplied" |
244 | if ! defined $mod or ! length $mod; |
245 | |
246 | croak "Nonsensical minimum version supplied" |
247 | if ! defined $ver or $ver =~ /[^0-9\.\_]/; |
248 | |
052a832c |
249 | local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ ) |
250 | if SPURIOUS_VERSION_CHECK_WARNINGS; |
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251 | |
56270bba |
252 | croak "$mod does not seem to provide a version (perhaps it never loaded)" |
253 | unless $mod->VERSION; |
254 | |
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255 | local $@; |
256 | eval { $mod->VERSION($ver) } ? 1 : 0; |
257 | } |
258 | |
d634850b |
259 | sub modver_gt_or_eq_and_lt ($$$) { |
260 | my ($mod, $v_ge, $v_lt) = @_; |
261 | |
262 | croak "Nonsensical maximum version supplied" |
263 | if ! defined $v_lt or $v_lt =~ /[^0-9\.\_]/; |
264 | |
265 | return ( |
266 | modver_gt_or_eq($mod, $v_ge) |
267 | and |
268 | ! modver_gt_or_eq($mod, $v_lt) |
269 | ) ? 1 : 0; |
270 | } |
271 | |
a9da9b6a |
272 | { |
273 | my $list_ctx_ok_stack_marker; |
274 | |
e89c7968 |
275 | sub fail_on_internal_wantarray () { |
a9da9b6a |
276 | return if $list_ctx_ok_stack_marker; |
277 | |
278 | if (! defined wantarray) { |
279 | croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard'); |
280 | } |
281 | |
282 | my $cf = 1; |
821edc09 |
283 | while ( ( (CORE::caller($cf+1))[3] || '' ) =~ / :: (?: |
a9da9b6a |
284 | |
285 | # these are public API parts that alter behavior on wantarray |
286 | search | search_related | slice | search_literal |
287 | |
288 | | |
289 | |
290 | # these are explicitly prefixed, since we only recognize them as valid |
291 | # escapes when they come from the guts of CDBICompat |
292 | CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all ) |
293 | |
294 | ) $/x ) { |
295 | $cf++; |
296 | } |
297 | |
e89c7968 |
298 | my ($fr, $want, $argdesc); |
299 | { |
300 | package DB; |
821edc09 |
301 | $fr = [ CORE::caller($cf) ]; |
302 | $want = ( CORE::caller($cf-1) )[5]; |
e89c7968 |
303 | $argdesc = ref $DB::args[0] |
304 | ? DBIx::Class::_Util::refdesc($DB::args[0]) |
305 | : 'non ' |
306 | ; |
307 | }; |
308 | |
a9da9b6a |
309 | if ( |
e89c7968 |
310 | $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/ |
a9da9b6a |
311 | ) { |
a9da9b6a |
312 | DBIx::Class::Exception->throw( sprintf ( |
e89c7968 |
313 | "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts", |
314 | $argdesc, @{$fr}[1,2] |
a9da9b6a |
315 | ), 'with_stacktrace'); |
316 | } |
317 | |
318 | my $mark = []; |
319 | weaken ( $list_ctx_ok_stack_marker = $mark ); |
320 | $mark; |
321 | } |
322 | } |
323 | |
77c3a5dc |
324 | sub fail_on_internal_call { |
325 | my ($fr, $argdesc); |
326 | { |
327 | package DB; |
821edc09 |
328 | $fr = [ CORE::caller(1) ]; |
77c3a5dc |
329 | $argdesc = ref $DB::args[0] |
330 | ? DBIx::Class::_Util::refdesc($DB::args[0]) |
331 | : undef |
332 | ; |
333 | }; |
334 | |
335 | if ( |
336 | $argdesc |
337 | and |
338 | $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/ |
339 | and |
340 | $fr->[1] !~ /\b(?:CDBICompat|ResultSetProxy)\b/ # no point touching there |
341 | ) { |
342 | DBIx::Class::Exception->throw( sprintf ( |
343 | "Illegal internal call of indirect proxy-method %s() with argument %s: examine the last lines of the proxy method deparse below to determine what to call directly instead at %s on line %d\n\n%s\n\n Stacktrace starts", |
344 | $fr->[3], $argdesc, @{$fr}[1,2], ( $fr->[6] || do { |
345 | require B::Deparse; |
346 | no strict 'refs'; |
347 | B::Deparse->new->coderef2text(\&{$fr->[3]}) |
348 | }), |
349 | ), 'with_stacktrace'); |
350 | } |
351 | } |
352 | |
b1dbf716 |
353 | 1; |