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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 => ( "$]" < 5.010 ? 1 : 0); |
b1dbf716 |
8 | |
37873f78 |
9 | BEGIN { |
10 | package # hide from pause |
11 | DBIx::Class::_ENV_; |
12 | |
13 | use Config; |
14 | |
15 | use constant { |
16 | |
17 | # but of course |
18 | BROKEN_FORK => ($^O eq 'MSWin32') ? 1 : 0, |
19 | |
750a4ad2 |
20 | BROKEN_GOTO => ( "$]" < 5.008003 ) ? 1 : 0, |
8d73fcd4 |
21 | |
37873f78 |
22 | HAS_ITHREADS => $Config{useithreads} ? 1 : 0, |
23 | |
bbf6a9a5 |
24 | UNSTABLE_DOLLARAT => ( "$]" < 5.013002 ) ? 1 : 0, |
25 | |
69016f65 |
26 | DBICTEST => $INC{"DBICTest/Util.pm"} ? 1 : 0, |
37873f78 |
27 | |
28 | # During 5.13 dev cycle HELEMs started to leak on copy |
6cfb1d2f |
29 | # add an escape for these perls ON SMOKERS - a user will still get death |
750a4ad2 |
30 | PEEPEENESS => ( eval { DBICTest::RunMode->is_smoker } && ( "$]" >= 5.013005 and "$]" <= 5.013006) ), |
37873f78 |
31 | |
1b658919 |
32 | SHUFFLE_UNORDERED_RESULTSETS => $ENV{DBIC_SHUFFLE_UNORDERED_RESULTSETS} ? 1 : 0, |
33 | |
37873f78 |
34 | ASSERT_NO_INTERNAL_WANTARRAY => $ENV{DBIC_ASSERT_NO_INTERNAL_WANTARRAY} ? 1 : 0, |
35 | |
77c3a5dc |
36 | ASSERT_NO_INTERNAL_INDIRECT_CALLS => $ENV{DBIC_ASSERT_NO_INTERNAL_INDIRECT_CALLS} ? 1 : 0, |
37 | |
2fdeef65 |
38 | STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE => $ENV{DBIC_STRESSTEST_UTF8_UPGRADE_GENERATED_COLLAPSER_SOURCE} ? 1 : 0, |
39 | |
f45dc928 |
40 | STRESSTEST_COLUMN_INFO_UNAWARE_STORAGE => $ENV{DBIC_STRESSTEST_COLUMN_INFO_UNAWARE_STORAGE} ? 1 : 0, |
41 | |
37873f78 |
42 | IV_SIZE => $Config{ivsize}, |
00882d2c |
43 | |
44 | OS_NAME => $^O, |
37873f78 |
45 | }; |
46 | |
750a4ad2 |
47 | if ( "$]" < 5.009_005) { |
37873f78 |
48 | require MRO::Compat; |
49 | constant->import( OLD_MRO => 1 ); |
50 | } |
51 | else { |
52 | require mro; |
53 | constant->import( OLD_MRO => 0 ); |
54 | } |
55 | } |
56 | |
841efcb3 |
57 | # FIXME - this is not supposed to be here |
58 | # Carp::Skip to the rescue soon |
59 | use DBIx::Class::Carp '^DBIx::Class|^DBICTest'; |
60 | |
d7d45bdc |
61 | use B (); |
841efcb3 |
62 | use Carp 'croak'; |
d7d45bdc |
63 | use Storable 'nfreeze'; |
3d56e026 |
64 | use Scalar::Util qw(weaken blessed reftype refaddr); |
3705e3b2 |
65 | use List::Util qw(first); |
0020e364 |
66 | use Sub::Quote qw(qsub quote_sub); |
7f9a3f70 |
67 | |
1c30a2e4 |
68 | # Already correctly prototyped: perlbrew exec perl -MStorable -e 'warn prototype \&Storable::dclone' |
69 | BEGIN { *deep_clone = \&Storable::dclone } |
70 | |
b1dbf716 |
71 | use base 'Exporter'; |
3705e3b2 |
72 | our @EXPORT_OK = qw( |
d634850b |
73 | sigwarn_silencer modver_gt_or_eq modver_gt_or_eq_and_lt |
77c3a5dc |
74 | fail_on_internal_wantarray fail_on_internal_call |
bbf6a9a5 |
75 | refdesc refcount hrefaddr |
76 | scope_guard is_exception detected_reinvoked_destructor |
1c30a2e4 |
77 | quote_sub qsub perlstring serialize deep_clone |
facd0e8e |
78 | UNRESOLVABLE_CONDITION |
3705e3b2 |
79 | ); |
052a832c |
80 | |
facd0e8e |
81 | use constant UNRESOLVABLE_CONDITION => \ '1 = 0'; |
82 | |
bf302897 |
83 | sub sigwarn_silencer ($) { |
052a832c |
84 | my $pattern = shift; |
85 | |
86 | croak "Expecting a regexp" if ref $pattern ne 'Regexp'; |
87 | |
88 | my $orig_sig_warn = $SIG{__WARN__} || sub { CORE::warn(@_) }; |
89 | |
90 | return sub { &$orig_sig_warn unless $_[0] =~ $pattern }; |
91 | } |
b1dbf716 |
92 | |
01b25f12 |
93 | sub perlstring ($) { q{"}. quotemeta( shift ). q{"} }; |
94 | |
3d56e026 |
95 | sub hrefaddr ($) { sprintf '0x%x', &refaddr||0 } |
8433421f |
96 | |
97 | sub refdesc ($) { |
98 | croak "Expecting a reference" if ! length ref $_[0]; |
99 | |
100 | # be careful not to trigger stringification, |
101 | # reuse @_ as a scratch-pad |
102 | sprintf '%s%s(0x%x)', |
103 | ( defined( $_[1] = blessed $_[0]) ? "$_[1]=" : '' ), |
104 | reftype $_[0], |
3d56e026 |
105 | refaddr($_[0]), |
8433421f |
106 | ; |
107 | } |
bf302897 |
108 | |
109 | sub refcount ($) { |
dac7972a |
110 | croak "Expecting a reference" if ! length ref $_[0]; |
111 | |
dac7972a |
112 | # No tempvars - must operate on $_[0], otherwise the pad |
113 | # will count as an extra ref |
114 | B::svref_2object($_[0])->REFCNT; |
115 | } |
116 | |
b34d9331 |
117 | sub serialize ($) { |
b34d9331 |
118 | local $Storable::canonical = 1; |
d7d45bdc |
119 | nfreeze($_[0]); |
b34d9331 |
120 | } |
121 | |
bbf6a9a5 |
122 | sub scope_guard (&) { |
123 | croak 'Calling scope_guard() in void context makes no sense' |
124 | if ! defined wantarray; |
125 | |
126 | # no direct blessing of coderefs - DESTROY is buggy on those |
127 | bless [ $_[0] ], 'DBIx::Class::_Util::ScopeGuard'; |
128 | } |
129 | { |
130 | package # |
131 | DBIx::Class::_Util::ScopeGuard; |
132 | |
133 | sub DESTROY { |
134 | &DBIx::Class::_Util::detected_reinvoked_destructor; |
135 | |
136 | local $@ if DBIx::Class::_ENV_::UNSTABLE_DOLLARAT; |
137 | |
138 | eval { |
139 | $_[0]->[0]->(); |
140 | 1; |
141 | } or do { |
142 | Carp::cluck "Execution of scope guard $_[0] resulted in the non-trappable exception:\n\n$@"; |
143 | }; |
144 | } |
145 | } |
146 | |
147 | |
841efcb3 |
148 | sub is_exception ($) { |
149 | my $e = $_[0]; |
150 | |
35cf7d1a |
151 | # FIXME |
a0414138 |
152 | # this is not strictly correct - an eval setting $@ to undef |
153 | # is *not* the same as an eval setting $@ to '' |
154 | # but for the sake of simplicity assume the following for |
155 | # the time being |
156 | return 0 unless defined $e; |
157 | |
841efcb3 |
158 | my ($not_blank, $suberror); |
159 | { |
160 | local $@; |
161 | eval { |
d52c4a75 |
162 | # The ne() here is deliberate - a plain length($e), or worse "$e" ne |
163 | # will entirely obviate the need for the encolsing eval{}, as the |
164 | # condition we guard against is a missing fallback overload |
165 | $not_blank = ( $e ne '' ); |
841efcb3 |
166 | 1; |
167 | } or $suberror = $@; |
168 | } |
169 | |
170 | if (defined $suberror) { |
171 | if (length (my $class = blessed($e) )) { |
172 | carp_unique( sprintf( |
9bea2000 |
173 | 'External exception class %s implements partial (broken) overloading ' |
174 | . 'preventing its instances from being used in simple ($x eq $y) ' |
841efcb3 |
175 | . 'comparisons. Given Perl\'s "globally cooperative" exception ' |
176 | . 'handling this type of brokenness is extremely dangerous on ' |
177 | . 'exception objects, as it may (and often does) result in silent ' |
178 | . '"exception substitution". DBIx::Class tries to work around this ' |
179 | . 'as much as possible, but other parts of your software stack may ' |
180 | . 'not be even aware of this. Please submit a bugreport against the ' |
181 | . 'distribution containing %s and in the meantime apply a fix similar ' |
182 | . 'to the one shown at %s, in order to ensure your exception handling ' |
183 | . 'is saner application-wide. What follows is the actual error text ' |
184 | . "as generated by Perl itself:\n\n%s\n ", |
9bea2000 |
185 | $class, |
841efcb3 |
186 | $class, |
187 | 'http://v.gd/DBIC_overload_tempfix/', |
188 | $suberror, |
189 | )); |
190 | |
191 | # workaround, keeps spice flowing |
d52c4a75 |
192 | $not_blank = !!( length $e ); |
841efcb3 |
193 | } |
194 | else { |
195 | # not blessed yet failed the 'ne'... this makes 0 sense... |
196 | # just throw further |
197 | die $suberror |
198 | } |
199 | } |
84e4e006 |
200 | elsif ( |
201 | # a ref evaluating to '' is definitively a "null object" |
202 | ( not $not_blank ) |
203 | and |
204 | length( my $class = ref $e ) |
205 | ) { |
206 | carp_unique( sprintf( |
207 | "Objects of external exception class '%s' stringify to '' (the " |
208 | . 'empty string), implementing the so called null-object-pattern. ' |
209 | . 'Given Perl\'s "globally cooperative" exception handling using this ' |
210 | . 'class of exceptions is extremely dangerous, as it may (and often ' |
211 | . 'does) result in silent discarding of errors. DBIx::Class tries to ' |
212 | . 'work around this as much as possible, but other parts of your ' |
213 | . 'software stack may not be even aware of the problem. Please submit ' |
35cf7d1a |
214 | . 'a bugreport against the distribution containing %s', |
84e4e006 |
215 | |
216 | ($class) x 2, |
217 | )); |
218 | |
219 | $not_blank = 1; |
220 | } |
841efcb3 |
221 | |
222 | return $not_blank; |
223 | } |
224 | |
3d56e026 |
225 | { |
226 | my $destruction_registry = {}; |
227 | |
228 | sub CLONE { |
229 | $destruction_registry = { map |
230 | { defined $_ ? ( refaddr($_) => $_ ) : () } |
231 | values %$destruction_registry |
232 | }; |
233 | } |
234 | |
235 | # This is almost invariably invoked from within DESTROY |
236 | # throwing exceptions won't work |
e1d9e578 |
237 | sub detected_reinvoked_destructor { |
3d56e026 |
238 | |
239 | # quick "garbage collection" pass - prevents the registry |
240 | # from slowly growing with a bunch of undef-valued keys |
241 | defined $destruction_registry->{$_} or delete $destruction_registry->{$_} |
242 | for keys %$destruction_registry; |
243 | |
e1d9e578 |
244 | if (! length ref $_[0]) { |
245 | printf STDERR '%s() expects a blessed reference %s', |
3d56e026 |
246 | (caller(0))[3], |
247 | Carp::longmess, |
248 | ; |
249 | return undef; # don't know wtf to do |
250 | } |
e1d9e578 |
251 | elsif (! defined $destruction_registry->{ my $addr = refaddr($_[0]) } ) { |
3d56e026 |
252 | weaken( $destruction_registry->{$addr} = $_[0] ); |
253 | return 0; |
254 | } |
255 | else { |
256 | carp_unique ( sprintf ( |
257 | 'Preventing *MULTIPLE* DESTROY() invocations on %s - an *EXTREMELY ' |
258 | . 'DANGEROUS* condition which is *ALMOST CERTAINLY GLOBAL* within your ' |
259 | . 'application, affecting *ALL* classes without active protection against ' |
260 | . 'this. Diagnose and fix the root cause ASAP!!!%s', |
261 | refdesc $_[0], |
262 | ( ( $INC{'Devel/StackTrace.pm'} and ! do { local $@; eval { Devel::StackTrace->VERSION(2) } } ) |
263 | ? " (likely culprit Devel::StackTrace\@@{[ Devel::StackTrace->VERSION ]} found in %INC, http://is.gd/D_ST_refcap)" |
264 | : '' |
265 | ) |
266 | )); |
267 | |
268 | return 1; |
269 | } |
270 | } |
271 | } |
272 | |
7302b3e0 |
273 | my $module_name_rx = qr/ \A [A-Z_a-z] [0-9A-Z_a-z]* (?: :: [0-9A-Z_a-z]+ )* \z /x; |
274 | my $ver_rx = qr/ \A [0-9]+ (?: \. [0-9]+ )* (?: \_ [0-9]+ )* \z /x; |
275 | |
bf302897 |
276 | sub modver_gt_or_eq ($$) { |
b1dbf716 |
277 | my ($mod, $ver) = @_; |
278 | |
279 | croak "Nonsensical module name supplied" |
7302b3e0 |
280 | if ! defined $mod or $mod !~ $module_name_rx; |
b1dbf716 |
281 | |
282 | croak "Nonsensical minimum version supplied" |
7302b3e0 |
283 | if ! defined $ver or $ver !~ $ver_rx; |
284 | |
285 | no strict 'refs'; |
286 | my $ver_cache = ${"${mod}::__DBIC_MODULE_VERSION_CHECKS__"} ||= ( $mod->VERSION |
287 | ? {} |
288 | : croak "$mod does not seem to provide a version (perhaps it never loaded)" |
289 | ); |
290 | |
291 | ! defined $ver_cache->{$ver} |
292 | and |
293 | $ver_cache->{$ver} = do { |
b1dbf716 |
294 | |
7302b3e0 |
295 | local $SIG{__WARN__} = sigwarn_silencer( qr/\Qisn't numeric in subroutine entry/ ) |
296 | if SPURIOUS_VERSION_CHECK_WARNINGS; |
b1dbf716 |
297 | |
7302b3e0 |
298 | local $@; |
299 | local $SIG{__DIE__}; |
300 | eval { $mod->VERSION($ver) } ? 1 : 0; |
301 | }; |
56270bba |
302 | |
7302b3e0 |
303 | $ver_cache->{$ver}; |
b1dbf716 |
304 | } |
305 | |
d634850b |
306 | sub modver_gt_or_eq_and_lt ($$$) { |
307 | my ($mod, $v_ge, $v_lt) = @_; |
308 | |
309 | croak "Nonsensical maximum version supplied" |
7302b3e0 |
310 | if ! defined $v_lt or $v_lt !~ $ver_rx; |
d634850b |
311 | |
312 | return ( |
313 | modver_gt_or_eq($mod, $v_ge) |
314 | and |
315 | ! modver_gt_or_eq($mod, $v_lt) |
316 | ) ? 1 : 0; |
317 | } |
318 | |
a9da9b6a |
319 | { |
320 | my $list_ctx_ok_stack_marker; |
321 | |
e89c7968 |
322 | sub fail_on_internal_wantarray () { |
a9da9b6a |
323 | return if $list_ctx_ok_stack_marker; |
324 | |
325 | if (! defined wantarray) { |
326 | croak('fail_on_internal_wantarray() needs a tempvar to save the stack marker guard'); |
327 | } |
328 | |
329 | my $cf = 1; |
821edc09 |
330 | while ( ( (CORE::caller($cf+1))[3] || '' ) =~ / :: (?: |
a9da9b6a |
331 | |
332 | # these are public API parts that alter behavior on wantarray |
333 | search | search_related | slice | search_literal |
334 | |
335 | | |
336 | |
337 | # these are explicitly prefixed, since we only recognize them as valid |
338 | # escapes when they come from the guts of CDBICompat |
339 | CDBICompat .*? :: (?: search_where | retrieve_from_sql | retrieve_all ) |
340 | |
341 | ) $/x ) { |
342 | $cf++; |
343 | } |
344 | |
e89c7968 |
345 | my ($fr, $want, $argdesc); |
346 | { |
347 | package DB; |
821edc09 |
348 | $fr = [ CORE::caller($cf) ]; |
349 | $want = ( CORE::caller($cf-1) )[5]; |
e89c7968 |
350 | $argdesc = ref $DB::args[0] |
351 | ? DBIx::Class::_Util::refdesc($DB::args[0]) |
352 | : 'non ' |
353 | ; |
354 | }; |
355 | |
a9da9b6a |
356 | if ( |
e89c7968 |
357 | $want and $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/ |
a9da9b6a |
358 | ) { |
a9da9b6a |
359 | DBIx::Class::Exception->throw( sprintf ( |
e89c7968 |
360 | "Improper use of %s instance in list context at %s line %d\n\n Stacktrace starts", |
361 | $argdesc, @{$fr}[1,2] |
a9da9b6a |
362 | ), 'with_stacktrace'); |
363 | } |
364 | |
365 | my $mark = []; |
366 | weaken ( $list_ctx_ok_stack_marker = $mark ); |
367 | $mark; |
368 | } |
369 | } |
370 | |
77c3a5dc |
371 | sub fail_on_internal_call { |
372 | my ($fr, $argdesc); |
373 | { |
374 | package DB; |
821edc09 |
375 | $fr = [ CORE::caller(1) ]; |
77c3a5dc |
376 | $argdesc = ref $DB::args[0] |
377 | ? DBIx::Class::_Util::refdesc($DB::args[0]) |
378 | : undef |
379 | ; |
380 | }; |
381 | |
382 | if ( |
383 | $argdesc |
384 | and |
385 | $fr->[0] =~ /^(?:DBIx::Class|DBICx::)/ |
386 | and |
387 | $fr->[1] !~ /\b(?:CDBICompat|ResultSetProxy)\b/ # no point touching there |
388 | ) { |
389 | DBIx::Class::Exception->throw( sprintf ( |
390 | "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", |
391 | $fr->[3], $argdesc, @{$fr}[1,2], ( $fr->[6] || do { |
392 | require B::Deparse; |
393 | no strict 'refs'; |
394 | B::Deparse->new->coderef2text(\&{$fr->[3]}) |
395 | }), |
396 | ), 'with_stacktrace'); |
397 | } |
398 | } |
399 | |
b1dbf716 |
400 | 1; |