1 /**********************************************************************
2 * plperl.c - perl as a procedural language for PostgreSQL
3 *
4 * src/pl/plperl/plperl.c
5 *
6 **********************************************************************/
7
8 #include "postgres.h"
9
10 /* Defined by Perl */
11 #undef _
12
13 /* system stuff */
14 #include <ctype.h>
15 #include <fcntl.h>
16 #include <limits.h>
17 #include <unistd.h>
18
19 /* postgreSQL stuff */
20 #include "access/htup_details.h"
21 #include "access/xact.h"
22 #include "catalog/pg_language.h"
23 #include "catalog/pg_proc.h"
24 #include "catalog/pg_proc_fn.h"
25 #include "catalog/pg_type.h"
26 #include "commands/event_trigger.h"
27 #include "commands/trigger.h"
28 #include "executor/spi.h"
29 #include "funcapi.h"
30 #include "mb/pg_wchar.h"
31 #include "miscadmin.h"
32 #include "nodes/makefuncs.h"
33 #include "parser/parse_type.h"
34 #include "storage/ipc.h"
35 #include "tcop/tcopprot.h"
36 #include "utils/builtins.h"
37 #include "utils/fmgroids.h"
38 #include "utils/guc.h"
39 #include "utils/hsearch.h"
40 #include "utils/lsyscache.h"
41 #include "utils/memutils.h"
42 #include "utils/rel.h"
43 #include "utils/syscache.h"
44 #include "utils/typcache.h"
45
46 /* define our text domain for translations */
47 #undef TEXTDOMAIN
48 #define TEXTDOMAIN PG_TEXTDOMAIN("plperl")
49
50 /* perl stuff */
51 #include "plperl.h"
52 #include "plperl_helpers.h"
53
54 /* string literal macros defining chunks of perl code */
55 #include "perlchunks.h"
56 /* defines PLPERL_SET_OPMASK */
57 #include "plperl_opmask.h"
58
59 EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
60 EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv);
61 EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv);
62
63 PG_MODULE_MAGIC;
64
65 /**********************************************************************
66 * Information associated with a Perl interpreter. We have one interpreter
67 * that is used for all plperlu (untrusted) functions. For plperl (trusted)
68 * functions, there is a separate interpreter for each effective SQL userid.
69 * (This is needed to ensure that an unprivileged user can't inject Perl code
70 * that'll be executed with the privileges of some other SQL user.)
71 *
72 * The plperl_interp_desc structs are kept in a Postgres hash table indexed
73 * by userid OID, with OID 0 used for the single untrusted interpreter.
74 * Once created, an interpreter is kept for the life of the process.
75 *
76 * We start out by creating a "held" interpreter, which we initialize
77 * only as far as we can do without deciding if it will be trusted or
78 * untrusted. Later, when we first need to run a plperl or plperlu
79 * function, we complete the initialization appropriately and move the
80 * PerlInterpreter pointer into the plperl_interp_hash hashtable. If after
81 * that we need more interpreters, we create them as needed if we can, or
82 * fail if the Perl build doesn't support multiple interpreters.
83 *
84 * The reason for all the dancing about with a held interpreter is to make
85 * it possible for people to preload a lot of Perl code at postmaster startup
86 * (using plperl.on_init) and then use that code in backends. Of course this
87 * will only work for the first interpreter created in any backend, but it's
88 * still useful with that restriction.
89 **********************************************************************/
90 typedef struct plperl_interp_desc
91 {
92 Oid user_id; /* Hash key (must be first!) */
93 PerlInterpreter *interp; /* The interpreter */
94 HTAB *query_hash; /* plperl_query_entry structs */
95 } plperl_interp_desc;
96
97
98 /**********************************************************************
99 * The information we cache about loaded procedures
100 *
101 * The fn_refcount field counts the struct's reference from the hash table
102 * shown below, plus one reference for each function call level that is using
103 * the struct. We can release the struct, and the associated Perl sub, when
104 * the fn_refcount goes to zero. Releasing the struct itself is done by
105 * deleting the fn_cxt, which also gets rid of all subsidiary data.
106 **********************************************************************/
107 typedef struct plperl_proc_desc
108 {
109 char *proname; /* user name of procedure */
110 MemoryContext fn_cxt; /* memory context for this procedure */
111 unsigned long fn_refcount; /* number of active references */
112 TransactionId fn_xmin; /* xmin/TID of procedure's pg_proc tuple */
113 ItemPointerData fn_tid;
114 SV *reference; /* CODE reference for Perl sub */
115 plperl_interp_desc *interp; /* interpreter it's created in */
116 bool fn_readonly; /* is function readonly (not volatile)? */
117 Oid lang_oid;
118 List *trftypes;
119 bool lanpltrusted; /* is it plperl, rather than plperlu? */
120 bool fn_retistuple; /* true, if function returns tuple */
121 bool fn_retisset; /* true, if function returns set */
122 bool fn_retisarray; /* true if function returns array */
123 /* Conversion info for function's result type: */
124 Oid result_oid; /* Oid of result type */
125 FmgrInfo result_in_func; /* I/O function and arg for result type */
126 Oid result_typioparam;
127 /* Per-argument info for function's argument types: */
128 int nargs;
129 FmgrInfo *arg_out_func; /* output fns for arg types */
130 bool *arg_is_rowtype; /* is each arg composite? */
131 Oid *arg_arraytype; /* InvalidOid if not an array */
132 } plperl_proc_desc;
133
134 #define increment_prodesc_refcount(prodesc) \
135 ((prodesc)->fn_refcount++)
136 #define decrement_prodesc_refcount(prodesc) \
137 do { \
138 Assert((prodesc)->fn_refcount > 0); \
139 if (--((prodesc)->fn_refcount) == 0) \
140 free_plperl_function(prodesc); \
141 } while(0)
142
143 /**********************************************************************
144 * For speedy lookup, we maintain a hash table mapping from
145 * function OID + trigger flag + user OID to plperl_proc_desc pointers.
146 * The reason the plperl_proc_desc struct isn't directly part of the hash
147 * entry is to simplify recovery from errors during compile_plperl_function.
148 *
149 * Note: if the same function is called by multiple userIDs within a session,
150 * there will be a separate plperl_proc_desc entry for each userID in the case
151 * of plperl functions, but only one entry for plperlu functions, because we
152 * set user_id = 0 for that case. If the user redeclares the same function
153 * from plperl to plperlu or vice versa, there might be multiple
154 * plperl_proc_ptr entries in the hashtable, but only one is valid.
155 **********************************************************************/
156 typedef struct plperl_proc_key
157 {
158 Oid proc_id; /* Function OID */
159
160 /*
161 * is_trigger is really a bool, but declare as Oid to ensure this struct
162 * contains no padding
163 */
164 Oid is_trigger; /* is it a trigger function? */
165 Oid user_id; /* User calling the function, or 0 */
166 } plperl_proc_key;
167
168 typedef struct plperl_proc_ptr
169 {
170 plperl_proc_key proc_key; /* Hash key (must be first!) */
171 plperl_proc_desc *proc_ptr;
172 } plperl_proc_ptr;
173
174 /*
175 * The information we cache for the duration of a single call to a
176 * function.
177 */
178 typedef struct plperl_call_data
179 {
180 plperl_proc_desc *prodesc;
181 FunctionCallInfo fcinfo;
182 Tuplestorestate *tuple_store;
183 TupleDesc ret_tdesc;
184 MemoryContext tmp_cxt;
185 } plperl_call_data;
186
187 /**********************************************************************
188 * The information we cache about prepared and saved plans
189 **********************************************************************/
190 typedef struct plperl_query_desc
191 {
192 char qname[24];
193 MemoryContext plan_cxt; /* context holding this struct */
194 SPIPlanPtr plan;
195 int nargs;
196 Oid *argtypes;
197 FmgrInfo *arginfuncs;
198 Oid *argtypioparams;
199 } plperl_query_desc;
200
201 /* hash table entry for query desc */
202
203 typedef struct plperl_query_entry
204 {
205 char query_name[NAMEDATALEN];
206 plperl_query_desc *query_data;
207 } plperl_query_entry;
208
209 /**********************************************************************
210 * Information for PostgreSQL - Perl array conversion.
211 **********************************************************************/
212 typedef struct plperl_array_info
213 {
214 int ndims;
215 bool elem_is_rowtype; /* 't' if element type is a rowtype */
216 Datum *elements;
217 bool *nulls;
218 int *nelems;
219 FmgrInfo proc;
220 FmgrInfo transform_proc;
221 } plperl_array_info;
222
223 /**********************************************************************
224 * Global data
225 **********************************************************************/
226
227 static HTAB *plperl_interp_hash = NULL;
228 static HTAB *plperl_proc_hash = NULL;
229 static plperl_interp_desc *plperl_active_interp = NULL;
230
231 /* If we have an unassigned "held" interpreter, it's stored here */
232 static PerlInterpreter *plperl_held_interp = NULL;
233
234 /* GUC variables */
235 static bool plperl_use_strict = false;
236 static char *plperl_on_init = NULL;
237 static char *plperl_on_plperl_init = NULL;
238 static char *plperl_on_plperlu_init = NULL;
239
240 static bool plperl_ending = false;
241 static OP *(*pp_require_orig) (pTHX) = NULL;
242 static char plperl_opmask[MAXO];
243
244 /* this is saved and restored by plperl_call_handler */
245 static plperl_call_data *current_call_data = NULL;
246
247 /**********************************************************************
248 * Forward declarations
249 **********************************************************************/
250 void _PG_init(void);
251
252 static PerlInterpreter *plperl_init_interp(void);
253 static void plperl_destroy_interp(PerlInterpreter **);
254 static void plperl_fini(int code, Datum arg);
255 static void set_interp_require(bool trusted);
256
257 static Datum plperl_func_handler(PG_FUNCTION_ARGS);
258 static Datum plperl_trigger_handler(PG_FUNCTION_ARGS);
259 static void plperl_event_trigger_handler(PG_FUNCTION_ARGS);
260
261 static void free_plperl_function(plperl_proc_desc *prodesc);
262
263 static plperl_proc_desc *compile_plperl_function(Oid fn_oid,
264 bool is_trigger,
265 bool is_event_trigger);
266
267 static SV *plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc);
268 static SV *plperl_hash_from_datum(Datum attr);
269 static SV *plperl_ref_from_pg_array(Datum arg, Oid typid);
270 static SV *split_array(plperl_array_info *info, int first, int last, int nest);
271 static SV *make_array_ref(plperl_array_info *info, int first, int last);
272 static SV *get_perl_array_ref(SV *sv);
273 static Datum plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
274 FunctionCallInfo fcinfo,
275 FmgrInfo *finfo, Oid typioparam,
276 bool *isnull);
277 static void _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam);
278 static Datum plperl_array_to_datum(SV *src, Oid typid, int32 typmod);
279 static void array_to_datum_internal(AV *av, ArrayBuildState *astate,
280 int *ndims, int *dims, int cur_depth,
281 Oid arraytypid, Oid elemtypid, int32 typmod,
282 FmgrInfo *finfo, Oid typioparam);
283 static Datum plperl_hash_to_datum(SV *src, TupleDesc td);
284
285 static void plperl_init_shared_libs(pTHX);
286 static void plperl_trusted_init(void);
287 static void plperl_untrusted_init(void);
288 static HV *plperl_spi_execute_fetch_result(SPITupleTable *, uint64, int);
289 static void plperl_return_next_internal(SV *sv);
290 static char *hek2cstr(HE *he);
291 static SV **hv_store_string(HV *hv, const char *key, SV *val);
292 static SV **hv_fetch_string(HV *hv, const char *key);
293 static void plperl_create_sub(plperl_proc_desc *desc, char *s, Oid fn_oid);
294 static SV *plperl_call_perl_func(plperl_proc_desc *desc,
295 FunctionCallInfo fcinfo);
296 static void plperl_compile_callback(void *arg);
297 static void plperl_exec_callback(void *arg);
298 static void plperl_inline_callback(void *arg);
299 static char *strip_trailing_ws(const char *msg);
300 static OP *pp_require_safe(pTHX);
301 static void activate_interpreter(plperl_interp_desc *interp_desc);
302
303 #ifdef WIN32
304 static char *setlocale_perl(int category, char *locale);
305 #endif
306
307 /*
308 * Decrement the refcount of the given SV within the active Perl interpreter
309 *
310 * This is handy because it reloads the active-interpreter pointer, saving
311 * some notation in callers that switch the active interpreter.
312 */
313 static inline void
SvREFCNT_dec_current(SV * sv)314 SvREFCNT_dec_current(SV *sv)
315 {
316 dTHX;
317
318 SvREFCNT_dec(sv);
319 }
320
321 /*
322 * convert a HE (hash entry) key to a cstr in the current database encoding
323 */
324 static char *
hek2cstr(HE * he)325 hek2cstr(HE *he)
326 {
327 dTHX;
328 char *ret;
329 SV *sv;
330
331 /*
332 * HeSVKEY_force will return a temporary mortal SV*, so we need to make
333 * sure to free it with ENTER/SAVE/FREE/LEAVE
334 */
335 ENTER;
336 SAVETMPS;
337
338 /*-------------------------
339 * Unfortunately, while HeUTF8 is true for most things > 256, for values
340 * 128..255 it's not, but perl will treat them as unicode code points if
341 * the utf8 flag is not set ( see The "Unicode Bug" in perldoc perlunicode
342 * for more)
343 *
344 * So if we did the expected:
345 * if (HeUTF8(he))
346 * utf_u2e(key...);
347 * else // must be ascii
348 * return HePV(he);
349 * we won't match columns with codepoints from 128..255
350 *
351 * For a more concrete example given a column with the name of the unicode
352 * codepoint U+00ae (registered sign) and a UTF8 database and the perl
353 * return_next { "\N{U+00ae}=>'text } would always fail as heUTF8 returns
354 * 0 and HePV() would give us a char * with 1 byte contains the decimal
355 * value 174
356 *
357 * Perl has the brains to know when it should utf8 encode 174 properly, so
358 * here we force it into an SV so that perl will figure it out and do the
359 * right thing
360 *-------------------------
361 */
362
363 sv = HeSVKEY_force(he);
364 if (HeUTF8(he))
365 SvUTF8_on(sv);
366 ret = sv2cstr(sv);
367
368 /* free sv */
369 FREETMPS;
370 LEAVE;
371
372 return ret;
373 }
374
375
376 /*
377 * _PG_init() - library load-time initialization
378 *
379 * DO NOT make this static nor change its name!
380 */
381 void
_PG_init(void)382 _PG_init(void)
383 {
384 /*
385 * Be sure we do initialization only once.
386 *
387 * If initialization fails due to, e.g., plperl_init_interp() throwing an
388 * exception, then we'll return here on the next usage and the user will
389 * get a rather cryptic: ERROR: attempt to redefine parameter
390 * "plperl.use_strict"
391 */
392 static bool inited = false;
393 HASHCTL hash_ctl;
394
395 if (inited)
396 return;
397
398 /*
399 * Support localized messages.
400 */
401 pg_bindtextdomain(TEXTDOMAIN);
402
403 /*
404 * Initialize plperl's GUCs.
405 */
406 DefineCustomBoolVariable("plperl.use_strict",
407 gettext_noop("If true, trusted and untrusted Perl code will be compiled in strict mode."),
408 NULL,
409 &plperl_use_strict,
410 false,
411 PGC_USERSET, 0,
412 NULL, NULL, NULL);
413
414 /*
415 * plperl.on_init is marked PGC_SIGHUP to support the idea that it might
416 * be executed in the postmaster (if plperl is loaded into the postmaster
417 * via shared_preload_libraries). This isn't really right either way,
418 * though.
419 */
420 DefineCustomStringVariable("plperl.on_init",
421 gettext_noop("Perl initialization code to execute when a Perl interpreter is initialized."),
422 NULL,
423 &plperl_on_init,
424 NULL,
425 PGC_SIGHUP, 0,
426 NULL, NULL, NULL);
427
428 /*
429 * plperl.on_plperl_init is marked PGC_SUSET to avoid issues whereby a
430 * user who might not even have USAGE privilege on the plperl language
431 * could nonetheless use SET plperl.on_plperl_init='...' to influence the
432 * behaviour of any existing plperl function that they can execute (which
433 * might be SECURITY DEFINER, leading to a privilege escalation). See
434 * http://archives.postgresql.org/pgsql-hackers/2010-02/msg00281.php and
435 * the overall thread.
436 *
437 * Note that because plperl.use_strict is USERSET, a nefarious user could
438 * set it to be applied against other people's functions. This is judged
439 * OK since the worst result would be an error. Your code oughta pass
440 * use_strict anyway ;-)
441 */
442 DefineCustomStringVariable("plperl.on_plperl_init",
443 gettext_noop("Perl initialization code to execute once when plperl is first used."),
444 NULL,
445 &plperl_on_plperl_init,
446 NULL,
447 PGC_SUSET, 0,
448 NULL, NULL, NULL);
449
450 DefineCustomStringVariable("plperl.on_plperlu_init",
451 gettext_noop("Perl initialization code to execute once when plperlu is first used."),
452 NULL,
453 &plperl_on_plperlu_init,
454 NULL,
455 PGC_SUSET, 0,
456 NULL, NULL, NULL);
457
458 EmitWarningsOnPlaceholders("plperl");
459
460 /*
461 * Create hash tables.
462 */
463 memset(&hash_ctl, 0, sizeof(hash_ctl));
464 hash_ctl.keysize = sizeof(Oid);
465 hash_ctl.entrysize = sizeof(plperl_interp_desc);
466 plperl_interp_hash = hash_create("PL/Perl interpreters",
467 8,
468 &hash_ctl,
469 HASH_ELEM | HASH_BLOBS);
470
471 memset(&hash_ctl, 0, sizeof(hash_ctl));
472 hash_ctl.keysize = sizeof(plperl_proc_key);
473 hash_ctl.entrysize = sizeof(plperl_proc_ptr);
474 plperl_proc_hash = hash_create("PL/Perl procedures",
475 32,
476 &hash_ctl,
477 HASH_ELEM | HASH_BLOBS);
478
479 /*
480 * Save the default opmask.
481 */
482 PLPERL_SET_OPMASK(plperl_opmask);
483
484 /*
485 * Create the first Perl interpreter, but only partially initialize it.
486 */
487 plperl_held_interp = plperl_init_interp();
488
489 inited = true;
490 }
491
492
493 static void
set_interp_require(bool trusted)494 set_interp_require(bool trusted)
495 {
496 if (trusted)
497 {
498 PL_ppaddr[OP_REQUIRE] = pp_require_safe;
499 PL_ppaddr[OP_DOFILE] = pp_require_safe;
500 }
501 else
502 {
503 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
504 PL_ppaddr[OP_DOFILE] = pp_require_orig;
505 }
506 }
507
508 /*
509 * Cleanup perl interpreters, including running END blocks.
510 * Does not fully undo the actions of _PG_init() nor make it callable again.
511 */
512 static void
plperl_fini(int code,Datum arg)513 plperl_fini(int code, Datum arg)
514 {
515 HASH_SEQ_STATUS hash_seq;
516 plperl_interp_desc *interp_desc;
517
518 elog(DEBUG3, "plperl_fini");
519
520 /*
521 * Indicate that perl is terminating. Disables use of spi_* functions when
522 * running END/DESTROY code. See check_spi_usage_allowed(). Could be
523 * enabled in future, with care, using a transaction
524 * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02743.php
525 */
526 plperl_ending = true;
527
528 /* Only perform perl cleanup if we're exiting cleanly */
529 if (code)
530 {
531 elog(DEBUG3, "plperl_fini: skipped");
532 return;
533 }
534
535 /* Zap the "held" interpreter, if we still have it */
536 plperl_destroy_interp(&plperl_held_interp);
537
538 /* Zap any fully-initialized interpreters */
539 hash_seq_init(&hash_seq, plperl_interp_hash);
540 while ((interp_desc = hash_seq_search(&hash_seq)) != NULL)
541 {
542 if (interp_desc->interp)
543 {
544 activate_interpreter(interp_desc);
545 plperl_destroy_interp(&interp_desc->interp);
546 }
547 }
548
549 elog(DEBUG3, "plperl_fini: done");
550 }
551
552
553 /*
554 * Select and activate an appropriate Perl interpreter.
555 */
556 static void
select_perl_context(bool trusted)557 select_perl_context(bool trusted)
558 {
559 Oid user_id;
560 plperl_interp_desc *interp_desc;
561 bool found;
562 PerlInterpreter *interp = NULL;
563
564 /* Find or create the interpreter hashtable entry for this userid */
565 if (trusted)
566 user_id = GetUserId();
567 else
568 user_id = InvalidOid;
569
570 interp_desc = hash_search(plperl_interp_hash, &user_id,
571 HASH_ENTER,
572 &found);
573 if (!found)
574 {
575 /* Initialize newly-created hashtable entry */
576 interp_desc->interp = NULL;
577 interp_desc->query_hash = NULL;
578 }
579
580 /* Make sure we have a query_hash for this interpreter */
581 if (interp_desc->query_hash == NULL)
582 {
583 HASHCTL hash_ctl;
584
585 memset(&hash_ctl, 0, sizeof(hash_ctl));
586 hash_ctl.keysize = NAMEDATALEN;
587 hash_ctl.entrysize = sizeof(plperl_query_entry);
588 interp_desc->query_hash = hash_create("PL/Perl queries",
589 32,
590 &hash_ctl,
591 HASH_ELEM);
592 }
593
594 /*
595 * Quick exit if already have an interpreter
596 */
597 if (interp_desc->interp)
598 {
599 activate_interpreter(interp_desc);
600 return;
601 }
602
603 /*
604 * adopt held interp if free, else create new one if possible
605 */
606 if (plperl_held_interp != NULL)
607 {
608 /* first actual use of a perl interpreter */
609 interp = plperl_held_interp;
610
611 /*
612 * Reset the plperl_held_interp pointer first; if we fail during init
613 * we don't want to try again with the partially-initialized interp.
614 */
615 plperl_held_interp = NULL;
616
617 if (trusted)
618 plperl_trusted_init();
619 else
620 plperl_untrusted_init();
621
622 /* successfully initialized, so arrange for cleanup */
623 on_proc_exit(plperl_fini, 0);
624 }
625 else
626 {
627 #ifdef MULTIPLICITY
628
629 /*
630 * plperl_init_interp will change Perl's idea of the active
631 * interpreter. Reset plperl_active_interp temporarily, so that if we
632 * hit an error partway through here, we'll make sure to switch back
633 * to a non-broken interpreter before running any other Perl
634 * functions.
635 */
636 plperl_active_interp = NULL;
637
638 /* Now build the new interpreter */
639 interp = plperl_init_interp();
640
641 if (trusted)
642 plperl_trusted_init();
643 else
644 plperl_untrusted_init();
645 #else
646 ereport(ERROR,
647 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
648 errmsg("cannot allocate multiple Perl interpreters on this platform")));
649 #endif
650 }
651
652 set_interp_require(trusted);
653
654 /*
655 * Since the timing of first use of PL/Perl can't be predicted, any
656 * database interaction during initialization is problematic. Including,
657 * but not limited to, security definer issues. So we only enable access
658 * to the database AFTER on_*_init code has run. See
659 * http://archives.postgresql.org/pgsql-hackers/2010-01/msg02669.php
660 */
661 {
662 dTHX;
663
664 newXS("PostgreSQL::InServer::SPI::bootstrap",
665 boot_PostgreSQL__InServer__SPI, __FILE__);
666
667 eval_pv("PostgreSQL::InServer::SPI::bootstrap()", FALSE);
668 if (SvTRUE(ERRSV))
669 ereport(ERROR,
670 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
671 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
672 errcontext("while executing PostgreSQL::InServer::SPI::bootstrap")));
673 }
674
675 /* Fully initialized, so mark the hashtable entry valid */
676 interp_desc->interp = interp;
677
678 /* And mark this as the active interpreter */
679 plperl_active_interp = interp_desc;
680 }
681
682 /*
683 * Make the specified interpreter the active one
684 *
685 * A call with NULL does nothing. This is so that "restoring" to a previously
686 * null state of plperl_active_interp doesn't result in useless thrashing.
687 */
688 static void
activate_interpreter(plperl_interp_desc * interp_desc)689 activate_interpreter(plperl_interp_desc *interp_desc)
690 {
691 if (interp_desc && plperl_active_interp != interp_desc)
692 {
693 Assert(interp_desc->interp);
694 PERL_SET_CONTEXT(interp_desc->interp);
695 /* trusted iff user_id isn't InvalidOid */
696 set_interp_require(OidIsValid(interp_desc->user_id));
697 plperl_active_interp = interp_desc;
698 }
699 }
700
701 /*
702 * Create a new Perl interpreter.
703 *
704 * We initialize the interpreter as far as we can without knowing whether
705 * it will become a trusted or untrusted interpreter; in particular, the
706 * plperl.on_init code will get executed. Later, either plperl_trusted_init
707 * or plperl_untrusted_init must be called to complete the initialization.
708 */
709 static PerlInterpreter *
plperl_init_interp(void)710 plperl_init_interp(void)
711 {
712 PerlInterpreter *plperl;
713
714 static char *embedding[3 + 2] = {
715 "", "-e", PLC_PERLBOOT
716 };
717 int nargs = 3;
718
719 #ifdef WIN32
720
721 /*
722 * The perl library on startup does horrible things like call
723 * setlocale(LC_ALL,""). We have protected against that on most platforms
724 * by setting the environment appropriately. However, on Windows,
725 * setlocale() does not consult the environment, so we need to save the
726 * existing locale settings before perl has a chance to mangle them and
727 * restore them after its dirty deeds are done.
728 *
729 * MSDN ref:
730 * http://msdn.microsoft.com/library/en-us/vclib/html/_crt_locale.asp
731 *
732 * It appears that we only need to do this on interpreter startup, and
733 * subsequent calls to the interpreter don't mess with the locale
734 * settings.
735 *
736 * We restore them using setlocale_perl(), defined below, so that Perl
737 * doesn't have a different idea of the locale from Postgres.
738 *
739 */
740
741 char *loc;
742 char *save_collate,
743 *save_ctype,
744 *save_monetary,
745 *save_numeric,
746 *save_time;
747
748 loc = setlocale(LC_COLLATE, NULL);
749 save_collate = loc ? pstrdup(loc) : NULL;
750 loc = setlocale(LC_CTYPE, NULL);
751 save_ctype = loc ? pstrdup(loc) : NULL;
752 loc = setlocale(LC_MONETARY, NULL);
753 save_monetary = loc ? pstrdup(loc) : NULL;
754 loc = setlocale(LC_NUMERIC, NULL);
755 save_numeric = loc ? pstrdup(loc) : NULL;
756 loc = setlocale(LC_TIME, NULL);
757 save_time = loc ? pstrdup(loc) : NULL;
758
759 #define PLPERL_RESTORE_LOCALE(name, saved) \
760 STMT_START { \
761 if (saved != NULL) { setlocale_perl(name, saved); pfree(saved); } \
762 } STMT_END
763 #endif /* WIN32 */
764
765 if (plperl_on_init && *plperl_on_init)
766 {
767 embedding[nargs++] = "-e";
768 embedding[nargs++] = plperl_on_init;
769 }
770
771 /*
772 * The perl API docs state that PERL_SYS_INIT3 should be called before
773 * allocating interpreters. Unfortunately, on some platforms this fails in
774 * the Perl_do_taint() routine, which is called when the platform is using
775 * the system's malloc() instead of perl's own. Other platforms, notably
776 * Windows, fail if PERL_SYS_INIT3 is not called. So we call it if it's
777 * available, unless perl is using the system malloc(), which is true when
778 * MYMALLOC is set.
779 */
780 #if defined(PERL_SYS_INIT3) && !defined(MYMALLOC)
781 {
782 static int perl_sys_init_done;
783
784 /* only call this the first time through, as per perlembed man page */
785 if (!perl_sys_init_done)
786 {
787 char *dummy_env[1] = {NULL};
788
789 PERL_SYS_INIT3(&nargs, (char ***) &embedding, (char ***) &dummy_env);
790
791 /*
792 * For unclear reasons, PERL_SYS_INIT3 sets the SIGFPE handler to
793 * SIG_IGN. Aside from being extremely unfriendly behavior for a
794 * library, this is dumb on the grounds that the results of a
795 * SIGFPE in this state are undefined according to POSIX, and in
796 * fact you get a forced process kill at least on Linux. Hence,
797 * restore the SIGFPE handler to the backend's standard setting.
798 * (See Perl bug 114574 for more information.)
799 */
800 pqsignal(SIGFPE, FloatExceptionHandler);
801
802 perl_sys_init_done = 1;
803 /* quiet warning if PERL_SYS_INIT3 doesn't use the third argument */
804 dummy_env[0] = NULL;
805 }
806 }
807 #endif
808
809 plperl = perl_alloc();
810 if (!plperl)
811 elog(ERROR, "could not allocate Perl interpreter");
812
813 PERL_SET_CONTEXT(plperl);
814 perl_construct(plperl);
815
816 /*
817 * Run END blocks in perl_destruct instead of perl_run. Note that dTHX
818 * loads up a pointer to the current interpreter, so we have to postpone
819 * it to here rather than put it at the function head.
820 */
821 {
822 dTHX;
823
824 PL_exit_flags |= PERL_EXIT_DESTRUCT_END;
825
826 /*
827 * Record the original function for the 'require' and 'dofile'
828 * opcodes. (They share the same implementation.) Ensure it's used
829 * for new interpreters.
830 */
831 if (!pp_require_orig)
832 pp_require_orig = PL_ppaddr[OP_REQUIRE];
833 else
834 {
835 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
836 PL_ppaddr[OP_DOFILE] = pp_require_orig;
837 }
838
839 #ifdef PLPERL_ENABLE_OPMASK_EARLY
840
841 /*
842 * For regression testing to prove that the PLC_PERLBOOT and
843 * PLC_TRUSTED code doesn't even compile any unsafe ops. In future
844 * there may be a valid need for them to do so, in which case this
845 * could be softened (perhaps moved to plperl_trusted_init()) or
846 * removed.
847 */
848 PL_op_mask = plperl_opmask;
849 #endif
850
851 if (perl_parse(plperl, plperl_init_shared_libs,
852 nargs, embedding, NULL) != 0)
853 ereport(ERROR,
854 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
855 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
856 errcontext("while parsing Perl initialization")));
857
858 if (perl_run(plperl) != 0)
859 ereport(ERROR,
860 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
861 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
862 errcontext("while running Perl initialization")));
863
864 #ifdef PLPERL_RESTORE_LOCALE
865 PLPERL_RESTORE_LOCALE(LC_COLLATE, save_collate);
866 PLPERL_RESTORE_LOCALE(LC_CTYPE, save_ctype);
867 PLPERL_RESTORE_LOCALE(LC_MONETARY, save_monetary);
868 PLPERL_RESTORE_LOCALE(LC_NUMERIC, save_numeric);
869 PLPERL_RESTORE_LOCALE(LC_TIME, save_time);
870 #endif
871 }
872
873 return plperl;
874 }
875
876
877 /*
878 * Our safe implementation of the require opcode.
879 * This is safe because it's completely unable to load any code.
880 * If the requested file/module has already been loaded it'll return true.
881 * If not, it'll die.
882 * So now "use Foo;" will work iff Foo has already been loaded.
883 */
884 static OP *
pp_require_safe(pTHX)885 pp_require_safe(pTHX)
886 {
887 dVAR;
888 dSP;
889 SV *sv,
890 **svp;
891 char *name;
892 STRLEN len;
893
894 sv = POPs;
895 name = SvPV(sv, len);
896 if (!(name && len > 0 && *name))
897 RETPUSHNO;
898
899 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
900 if (svp && *svp != &PL_sv_undef)
901 RETPUSHYES;
902
903 DIE(aTHX_ "Unable to load %s into plperl", name);
904
905 /*
906 * In most Perl versions, DIE() expands to a return statement, so the next
907 * line is not necessary. But in versions between but not including
908 * 5.11.1 and 5.13.3 it does not, so the next line is necessary to avoid a
909 * "control reaches end of non-void function" warning from gcc. Other
910 * compilers such as Solaris Studio will, however, issue a "statement not
911 * reached" warning instead.
912 */
913 return NULL;
914 }
915
916
917 /*
918 * Destroy one Perl interpreter ... actually we just run END blocks.
919 *
920 * Caller must have ensured this interpreter is the active one.
921 */
922 static void
plperl_destroy_interp(PerlInterpreter ** interp)923 plperl_destroy_interp(PerlInterpreter **interp)
924 {
925 if (interp && *interp)
926 {
927 /*
928 * Only a very minimal destruction is performed: - just call END
929 * blocks.
930 *
931 * We could call perl_destruct() but we'd need to audit its actions
932 * very carefully and work-around any that impact us. (Calling
933 * sv_clean_objs() isn't an option because it's not part of perl's
934 * public API so isn't portably available.) Meanwhile END blocks can
935 * be used to perform manual cleanup.
936 */
937 dTHX;
938
939 /* Run END blocks - based on perl's perl_destruct() */
940 if (PL_exit_flags & PERL_EXIT_DESTRUCT_END)
941 {
942 dJMPENV;
943 int x = 0;
944
945 JMPENV_PUSH(x);
946 PERL_UNUSED_VAR(x);
947 if (PL_endav && !PL_minus_c)
948 call_list(PL_scopestack_ix, PL_endav);
949 JMPENV_POP;
950 }
951 LEAVE;
952 FREETMPS;
953
954 *interp = NULL;
955 }
956 }
957
958 /*
959 * Initialize the current Perl interpreter as a trusted interp
960 */
961 static void
plperl_trusted_init(void)962 plperl_trusted_init(void)
963 {
964 dTHX;
965 HV *stash;
966 SV *sv;
967 char *key;
968 I32 klen;
969
970 /* use original require while we set up */
971 PL_ppaddr[OP_REQUIRE] = pp_require_orig;
972 PL_ppaddr[OP_DOFILE] = pp_require_orig;
973
974 eval_pv(PLC_TRUSTED, FALSE);
975 if (SvTRUE(ERRSV))
976 ereport(ERROR,
977 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
978 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
979 errcontext("while executing PLC_TRUSTED")));
980
981 /*
982 * Force loading of utf8 module now to prevent errors that can arise from
983 * the regex code later trying to load utf8 modules. See
984 * http://rt.perl.org/rt3/Ticket/Display.html?id=47576
985 */
986 eval_pv("my $a=chr(0x100); return $a =~ /\\xa9/i", FALSE);
987 if (SvTRUE(ERRSV))
988 ereport(ERROR,
989 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
990 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
991 errcontext("while executing utf8fix")));
992
993 /*
994 * Lock down the interpreter
995 */
996
997 /* switch to the safe require/dofile opcode for future code */
998 PL_ppaddr[OP_REQUIRE] = pp_require_safe;
999 PL_ppaddr[OP_DOFILE] = pp_require_safe;
1000
1001 /*
1002 * prevent (any more) unsafe opcodes being compiled PL_op_mask is per
1003 * interpreter, so this only needs to be set once
1004 */
1005 PL_op_mask = plperl_opmask;
1006
1007 /* delete the DynaLoader:: namespace so extensions can't be loaded */
1008 stash = gv_stashpv("DynaLoader", GV_ADDWARN);
1009 hv_iterinit(stash);
1010 while ((sv = hv_iternextsv(stash, &key, &klen)))
1011 {
1012 if (!isGV_with_GP(sv) || !GvCV(sv))
1013 continue;
1014 SvREFCNT_dec(GvCV(sv)); /* free the CV */
1015 GvCV_set(sv, NULL); /* prevent call via GV */
1016 }
1017 hv_clear(stash);
1018
1019 /* invalidate assorted caches */
1020 ++PL_sub_generation;
1021 hv_clear(PL_stashcache);
1022
1023 /*
1024 * Execute plperl.on_plperl_init in the locked-down interpreter
1025 */
1026 if (plperl_on_plperl_init && *plperl_on_plperl_init)
1027 {
1028 eval_pv(plperl_on_plperl_init, FALSE);
1029 /* XXX need to find a way to determine a better errcode here */
1030 if (SvTRUE(ERRSV))
1031 ereport(ERROR,
1032 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1033 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
1034 errcontext("while executing plperl.on_plperl_init")));
1035 }
1036 }
1037
1038
1039 /*
1040 * Initialize the current Perl interpreter as an untrusted interp
1041 */
1042 static void
plperl_untrusted_init(void)1043 plperl_untrusted_init(void)
1044 {
1045 dTHX;
1046
1047 /*
1048 * Nothing to do except execute plperl.on_plperlu_init
1049 */
1050 if (plperl_on_plperlu_init && *plperl_on_plperlu_init)
1051 {
1052 eval_pv(plperl_on_plperlu_init, FALSE);
1053 if (SvTRUE(ERRSV))
1054 ereport(ERROR,
1055 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
1056 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV))),
1057 errcontext("while executing plperl.on_plperlu_init")));
1058 }
1059 }
1060
1061
1062 /*
1063 * Perl likes to put a newline after its error messages; clean up such
1064 */
1065 static char *
strip_trailing_ws(const char * msg)1066 strip_trailing_ws(const char *msg)
1067 {
1068 char *res = pstrdup(msg);
1069 int len = strlen(res);
1070
1071 while (len > 0 && isspace((unsigned char) res[len - 1]))
1072 res[--len] = '\0';
1073 return res;
1074 }
1075
1076
1077 /* Build a tuple from a hash. */
1078
1079 static HeapTuple
plperl_build_tuple_result(HV * perlhash,TupleDesc td)1080 plperl_build_tuple_result(HV *perlhash, TupleDesc td)
1081 {
1082 dTHX;
1083 Datum *values;
1084 bool *nulls;
1085 HE *he;
1086 HeapTuple tup;
1087
1088 values = palloc0(sizeof(Datum) * td->natts);
1089 nulls = palloc(sizeof(bool) * td->natts);
1090 memset(nulls, true, sizeof(bool) * td->natts);
1091
1092 hv_iterinit(perlhash);
1093 while ((he = hv_iternext(perlhash)))
1094 {
1095 SV *val = HeVAL(he);
1096 char *key = hek2cstr(he);
1097 int attn = SPI_fnumber(td, key);
1098
1099 if (attn == SPI_ERROR_NOATTRIBUTE)
1100 ereport(ERROR,
1101 (errcode(ERRCODE_UNDEFINED_COLUMN),
1102 errmsg("Perl hash contains nonexistent column \"%s\"",
1103 key)));
1104 if (attn <= 0)
1105 ereport(ERROR,
1106 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1107 errmsg("cannot set system attribute \"%s\"",
1108 key)));
1109
1110 values[attn - 1] = plperl_sv_to_datum(val,
1111 td->attrs[attn - 1]->atttypid,
1112 td->attrs[attn - 1]->atttypmod,
1113 NULL,
1114 NULL,
1115 InvalidOid,
1116 &nulls[attn - 1]);
1117
1118 pfree(key);
1119 }
1120 hv_iterinit(perlhash);
1121
1122 tup = heap_form_tuple(td, values, nulls);
1123 pfree(values);
1124 pfree(nulls);
1125 return tup;
1126 }
1127
1128 /* convert a hash reference to a datum */
1129 static Datum
plperl_hash_to_datum(SV * src,TupleDesc td)1130 plperl_hash_to_datum(SV *src, TupleDesc td)
1131 {
1132 HeapTuple tup = plperl_build_tuple_result((HV *) SvRV(src), td);
1133
1134 return HeapTupleGetDatum(tup);
1135 }
1136
1137 /*
1138 * if we are an array ref return the reference. this is special in that if we
1139 * are a PostgreSQL::InServer::ARRAY object we will return the 'magic' array.
1140 */
1141 static SV *
get_perl_array_ref(SV * sv)1142 get_perl_array_ref(SV *sv)
1143 {
1144 dTHX;
1145
1146 if (SvOK(sv) && SvROK(sv))
1147 {
1148 if (SvTYPE(SvRV(sv)) == SVt_PVAV)
1149 return sv;
1150 else if (sv_isa(sv, "PostgreSQL::InServer::ARRAY"))
1151 {
1152 HV *hv = (HV *) SvRV(sv);
1153 SV **sav = hv_fetch_string(hv, "array");
1154
1155 if (*sav && SvOK(*sav) && SvROK(*sav) &&
1156 SvTYPE(SvRV(*sav)) == SVt_PVAV)
1157 return *sav;
1158
1159 elog(ERROR, "could not get array reference from PostgreSQL::InServer::ARRAY object");
1160 }
1161 }
1162 return NULL;
1163 }
1164
1165 /*
1166 * helper function for plperl_array_to_datum, recurses for multi-D arrays
1167 */
1168 static void
array_to_datum_internal(AV * av,ArrayBuildState * astate,int * ndims,int * dims,int cur_depth,Oid arraytypid,Oid elemtypid,int32 typmod,FmgrInfo * finfo,Oid typioparam)1169 array_to_datum_internal(AV *av, ArrayBuildState *astate,
1170 int *ndims, int *dims, int cur_depth,
1171 Oid arraytypid, Oid elemtypid, int32 typmod,
1172 FmgrInfo *finfo, Oid typioparam)
1173 {
1174 dTHX;
1175 int i;
1176 int len = av_len(av) + 1;
1177
1178 for (i = 0; i < len; i++)
1179 {
1180 /* fetch the array element */
1181 SV **svp = av_fetch(av, i, FALSE);
1182
1183 /* see if this element is an array, if so get that */
1184 SV *sav = svp ? get_perl_array_ref(*svp) : NULL;
1185
1186 /* multi-dimensional array? */
1187 if (sav)
1188 {
1189 AV *nav = (AV *) SvRV(sav);
1190
1191 /* dimensionality checks */
1192 if (cur_depth + 1 > MAXDIM)
1193 ereport(ERROR,
1194 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
1195 errmsg("number of array dimensions (%d) exceeds the maximum allowed (%d)",
1196 cur_depth + 1, MAXDIM)));
1197
1198 /* set size when at first element in this level, else compare */
1199 if (i == 0 && *ndims == cur_depth)
1200 {
1201 dims[*ndims] = av_len(nav) + 1;
1202 (*ndims)++;
1203 }
1204 else if (av_len(nav) + 1 != dims[cur_depth])
1205 ereport(ERROR,
1206 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1207 errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1208
1209 /* recurse to fetch elements of this sub-array */
1210 array_to_datum_internal(nav, astate,
1211 ndims, dims, cur_depth + 1,
1212 arraytypid, elemtypid, typmod,
1213 finfo, typioparam);
1214 }
1215 else
1216 {
1217 Datum dat;
1218 bool isnull;
1219
1220 /* scalar after some sub-arrays at same level? */
1221 if (*ndims != cur_depth)
1222 ereport(ERROR,
1223 (errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
1224 errmsg("multidimensional arrays must have array expressions with matching dimensions")));
1225
1226 dat = plperl_sv_to_datum(svp ? *svp : NULL,
1227 elemtypid,
1228 typmod,
1229 NULL,
1230 finfo,
1231 typioparam,
1232 &isnull);
1233
1234 (void) accumArrayResult(astate, dat, isnull,
1235 elemtypid, CurrentMemoryContext);
1236 }
1237 }
1238 }
1239
1240 /*
1241 * convert perl array ref to a datum
1242 */
1243 static Datum
plperl_array_to_datum(SV * src,Oid typid,int32 typmod)1244 plperl_array_to_datum(SV *src, Oid typid, int32 typmod)
1245 {
1246 dTHX;
1247 ArrayBuildState *astate;
1248 Oid elemtypid;
1249 FmgrInfo finfo;
1250 Oid typioparam;
1251 int dims[MAXDIM];
1252 int lbs[MAXDIM];
1253 int ndims = 1;
1254 int i;
1255
1256 elemtypid = get_element_type(typid);
1257 if (!elemtypid)
1258 ereport(ERROR,
1259 (errcode(ERRCODE_DATATYPE_MISMATCH),
1260 errmsg("cannot convert Perl array to non-array type %s",
1261 format_type_be(typid))));
1262
1263 astate = initArrayResult(elemtypid, CurrentMemoryContext, true);
1264
1265 _sv_to_datum_finfo(elemtypid, &finfo, &typioparam);
1266
1267 memset(dims, 0, sizeof(dims));
1268 dims[0] = av_len((AV *) SvRV(src)) + 1;
1269
1270 array_to_datum_internal((AV *) SvRV(src), astate,
1271 &ndims, dims, 1,
1272 typid, elemtypid, typmod,
1273 &finfo, typioparam);
1274
1275 /* ensure we get zero-D array for no inputs, as per PG convention */
1276 if (dims[0] <= 0)
1277 ndims = 0;
1278
1279 for (i = 0; i < ndims; i++)
1280 lbs[i] = 1;
1281
1282 return makeMdArrayResult(astate, ndims, dims, lbs,
1283 CurrentMemoryContext, true);
1284 }
1285
1286 /* Get the information needed to convert data to the specified PG type */
1287 static void
_sv_to_datum_finfo(Oid typid,FmgrInfo * finfo,Oid * typioparam)1288 _sv_to_datum_finfo(Oid typid, FmgrInfo *finfo, Oid *typioparam)
1289 {
1290 Oid typinput;
1291
1292 /* XXX would be better to cache these lookups */
1293 getTypeInputInfo(typid,
1294 &typinput, typioparam);
1295 fmgr_info(typinput, finfo);
1296 }
1297
1298 /*
1299 * convert Perl SV to PG datum of type typid, typmod typmod
1300 *
1301 * Pass the PL/Perl function's fcinfo when attempting to convert to the
1302 * function's result type; otherwise pass NULL. This is used when we need to
1303 * resolve the actual result type of a function returning RECORD.
1304 *
1305 * finfo and typioparam should be the results of _sv_to_datum_finfo for the
1306 * given typid, or NULL/InvalidOid to let this function do the lookups.
1307 *
1308 * *isnull is an output parameter.
1309 */
1310 static Datum
plperl_sv_to_datum(SV * sv,Oid typid,int32 typmod,FunctionCallInfo fcinfo,FmgrInfo * finfo,Oid typioparam,bool * isnull)1311 plperl_sv_to_datum(SV *sv, Oid typid, int32 typmod,
1312 FunctionCallInfo fcinfo,
1313 FmgrInfo *finfo, Oid typioparam,
1314 bool *isnull)
1315 {
1316 FmgrInfo tmp;
1317 Oid funcid;
1318
1319 /* we might recurse */
1320 check_stack_depth();
1321
1322 *isnull = false;
1323
1324 /*
1325 * Return NULL if result is undef, or if we're in a function returning
1326 * VOID. In the latter case, we should pay no attention to the last Perl
1327 * statement's result, and this is a convenient means to ensure that.
1328 */
1329 if (!sv || !SvOK(sv) || typid == VOIDOID)
1330 {
1331 /* look up type info if they did not pass it */
1332 if (!finfo)
1333 {
1334 _sv_to_datum_finfo(typid, &tmp, &typioparam);
1335 finfo = &tmp;
1336 }
1337 *isnull = true;
1338 /* must call typinput in case it wants to reject NULL */
1339 return InputFunctionCall(finfo, NULL, typioparam, typmod);
1340 }
1341 else if ((funcid = get_transform_tosql(typid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
1342 return OidFunctionCall1(funcid, PointerGetDatum(sv));
1343 else if (SvROK(sv))
1344 {
1345 /* handle references */
1346 SV *sav = get_perl_array_ref(sv);
1347
1348 if (sav)
1349 {
1350 /* handle an arrayref */
1351 return plperl_array_to_datum(sav, typid, typmod);
1352 }
1353 else if (SvTYPE(SvRV(sv)) == SVt_PVHV)
1354 {
1355 /* handle a hashref */
1356 Datum ret;
1357 TupleDesc td;
1358
1359 if (!type_is_rowtype(typid))
1360 ereport(ERROR,
1361 (errcode(ERRCODE_DATATYPE_MISMATCH),
1362 errmsg("cannot convert Perl hash to non-composite type %s",
1363 format_type_be(typid))));
1364
1365 td = lookup_rowtype_tupdesc_noerror(typid, typmod, true);
1366 if (td == NULL)
1367 {
1368 /* Try to look it up based on our result type */
1369 if (fcinfo == NULL ||
1370 get_call_result_type(fcinfo, NULL, &td) != TYPEFUNC_COMPOSITE)
1371 ereport(ERROR,
1372 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1373 errmsg("function returning record called in context "
1374 "that cannot accept type record")));
1375 }
1376
1377 ret = plperl_hash_to_datum(sv, td);
1378
1379 /* Release on the result of get_call_result_type is harmless */
1380 ReleaseTupleDesc(td);
1381
1382 return ret;
1383 }
1384
1385 /* Reference, but not reference to hash or array ... */
1386 ereport(ERROR,
1387 (errcode(ERRCODE_DATATYPE_MISMATCH),
1388 errmsg("PL/Perl function must return reference to hash or array")));
1389 return (Datum) 0; /* shut up compiler */
1390 }
1391 else
1392 {
1393 /* handle a string/number */
1394 Datum ret;
1395 char *str = sv2cstr(sv);
1396
1397 /* did not pass in any typeinfo? look it up */
1398 if (!finfo)
1399 {
1400 _sv_to_datum_finfo(typid, &tmp, &typioparam);
1401 finfo = &tmp;
1402 }
1403
1404 ret = InputFunctionCall(finfo, str, typioparam, typmod);
1405 pfree(str);
1406
1407 return ret;
1408 }
1409 }
1410
1411 /* Convert the perl SV to a string returned by the type output function */
1412 char *
plperl_sv_to_literal(SV * sv,char * fqtypename)1413 plperl_sv_to_literal(SV *sv, char *fqtypename)
1414 {
1415 Datum str = CStringGetDatum(fqtypename);
1416 Oid typid = DirectFunctionCall1(regtypein, str);
1417 Oid typoutput;
1418 Datum datum;
1419 bool typisvarlena,
1420 isnull;
1421
1422 if (!OidIsValid(typid))
1423 ereport(ERROR,
1424 (errcode(ERRCODE_UNDEFINED_OBJECT),
1425 errmsg("lookup failed for type %s", fqtypename)));
1426
1427 datum = plperl_sv_to_datum(sv,
1428 typid, -1,
1429 NULL, NULL, InvalidOid,
1430 &isnull);
1431
1432 if (isnull)
1433 return NULL;
1434
1435 getTypeOutputInfo(typid,
1436 &typoutput, &typisvarlena);
1437
1438 return OidOutputFunctionCall(typoutput, datum);
1439 }
1440
1441 /*
1442 * Convert PostgreSQL array datum to a perl array reference.
1443 *
1444 * typid is arg's OID, which must be an array type.
1445 */
1446 static SV *
plperl_ref_from_pg_array(Datum arg,Oid typid)1447 plperl_ref_from_pg_array(Datum arg, Oid typid)
1448 {
1449 dTHX;
1450 ArrayType *ar = DatumGetArrayTypeP(arg);
1451 Oid elementtype = ARR_ELEMTYPE(ar);
1452 int16 typlen;
1453 bool typbyval;
1454 char typalign,
1455 typdelim;
1456 Oid typioparam;
1457 Oid typoutputfunc;
1458 Oid transform_funcid;
1459 int i,
1460 nitems,
1461 *dims;
1462 plperl_array_info *info;
1463 SV *av;
1464 HV *hv;
1465
1466 /*
1467 * Currently we make no effort to cache any of the stuff we look up here,
1468 * which is bad.
1469 */
1470 info = palloc0(sizeof(plperl_array_info));
1471
1472 /* get element type information, including output conversion function */
1473 get_type_io_data(elementtype, IOFunc_output,
1474 &typlen, &typbyval, &typalign,
1475 &typdelim, &typioparam, &typoutputfunc);
1476
1477 /* Check for a transform function */
1478 transform_funcid = get_transform_fromsql(elementtype,
1479 current_call_data->prodesc->lang_oid,
1480 current_call_data->prodesc->trftypes);
1481
1482 /* Look up transform or output function as appropriate */
1483 if (OidIsValid(transform_funcid))
1484 fmgr_info(transform_funcid, &info->transform_proc);
1485 else
1486 fmgr_info(typoutputfunc, &info->proc);
1487
1488 info->elem_is_rowtype = type_is_rowtype(elementtype);
1489
1490 /* Get the number and bounds of array dimensions */
1491 info->ndims = ARR_NDIM(ar);
1492 dims = ARR_DIMS(ar);
1493
1494 /* No dimensions? Return an empty array */
1495 if (info->ndims == 0)
1496 {
1497 av = newRV_noinc((SV *) newAV());
1498 }
1499 else
1500 {
1501 deconstruct_array(ar, elementtype, typlen, typbyval,
1502 typalign, &info->elements, &info->nulls,
1503 &nitems);
1504
1505 /* Get total number of elements in each dimension */
1506 info->nelems = palloc(sizeof(int) * info->ndims);
1507 info->nelems[0] = nitems;
1508 for (i = 1; i < info->ndims; i++)
1509 info->nelems[i] = info->nelems[i - 1] / dims[i - 1];
1510
1511 av = split_array(info, 0, nitems, 0);
1512 }
1513
1514 hv = newHV();
1515 (void) hv_store(hv, "array", 5, av, 0);
1516 (void) hv_store(hv, "typeoid", 7, newSVuv(typid), 0);
1517
1518 return sv_bless(newRV_noinc((SV *) hv),
1519 gv_stashpv("PostgreSQL::InServer::ARRAY", 0));
1520 }
1521
1522 /*
1523 * Recursively form array references from splices of the initial array
1524 */
1525 static SV *
split_array(plperl_array_info * info,int first,int last,int nest)1526 split_array(plperl_array_info *info, int first, int last, int nest)
1527 {
1528 dTHX;
1529 int i;
1530 AV *result;
1531
1532 /* we should only be called when we have something to split */
1533 Assert(info->ndims > 0);
1534
1535 /* since this function recurses, it could be driven to stack overflow */
1536 check_stack_depth();
1537
1538 /*
1539 * Base case, return a reference to a single-dimensional array
1540 */
1541 if (nest >= info->ndims - 1)
1542 return make_array_ref(info, first, last);
1543
1544 result = newAV();
1545 for (i = first; i < last; i += info->nelems[nest + 1])
1546 {
1547 /* Recursively form references to arrays of lower dimensions */
1548 SV *ref = split_array(info, i, i + info->nelems[nest + 1], nest + 1);
1549
1550 av_push(result, ref);
1551 }
1552 return newRV_noinc((SV *) result);
1553 }
1554
1555 /*
1556 * Create a Perl reference from a one-dimensional C array, converting
1557 * composite type elements to hash references.
1558 */
1559 static SV *
make_array_ref(plperl_array_info * info,int first,int last)1560 make_array_ref(plperl_array_info *info, int first, int last)
1561 {
1562 dTHX;
1563 int i;
1564 AV *result = newAV();
1565
1566 for (i = first; i < last; i++)
1567 {
1568 if (info->nulls[i])
1569 {
1570 /*
1571 * We can't use &PL_sv_undef here. See "AVs, HVs and undefined
1572 * values" in perlguts.
1573 */
1574 av_push(result, newSV(0));
1575 }
1576 else
1577 {
1578 Datum itemvalue = info->elements[i];
1579
1580 if (info->transform_proc.fn_oid)
1581 av_push(result, (SV *) DatumGetPointer(FunctionCall1(&info->transform_proc, itemvalue)));
1582 else if (info->elem_is_rowtype)
1583 /* Handle composite type elements */
1584 av_push(result, plperl_hash_from_datum(itemvalue));
1585 else
1586 {
1587 char *val = OutputFunctionCall(&info->proc, itemvalue);
1588
1589 av_push(result, cstr2sv(val));
1590 }
1591 }
1592 }
1593 return newRV_noinc((SV *) result);
1594 }
1595
1596 /* Set up the arguments for a trigger call. */
1597 static SV *
plperl_trigger_build_args(FunctionCallInfo fcinfo)1598 plperl_trigger_build_args(FunctionCallInfo fcinfo)
1599 {
1600 dTHX;
1601 TriggerData *tdata;
1602 TupleDesc tupdesc;
1603 int i;
1604 char *level;
1605 char *event;
1606 char *relid;
1607 char *when;
1608 HV *hv;
1609
1610 hv = newHV();
1611 hv_ksplit(hv, 12); /* pre-grow the hash */
1612
1613 tdata = (TriggerData *) fcinfo->context;
1614 tupdesc = tdata->tg_relation->rd_att;
1615
1616 relid = DatumGetCString(
1617 DirectFunctionCall1(oidout,
1618 ObjectIdGetDatum(tdata->tg_relation->rd_id)
1619 )
1620 );
1621
1622 hv_store_string(hv, "name", cstr2sv(tdata->tg_trigger->tgname));
1623 hv_store_string(hv, "relid", cstr2sv(relid));
1624
1625 if (TRIGGER_FIRED_BY_INSERT(tdata->tg_event))
1626 {
1627 event = "INSERT";
1628 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1629 hv_store_string(hv, "new",
1630 plperl_hash_from_tuple(tdata->tg_trigtuple,
1631 tupdesc));
1632 }
1633 else if (TRIGGER_FIRED_BY_DELETE(tdata->tg_event))
1634 {
1635 event = "DELETE";
1636 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1637 hv_store_string(hv, "old",
1638 plperl_hash_from_tuple(tdata->tg_trigtuple,
1639 tupdesc));
1640 }
1641 else if (TRIGGER_FIRED_BY_UPDATE(tdata->tg_event))
1642 {
1643 event = "UPDATE";
1644 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1645 {
1646 hv_store_string(hv, "old",
1647 plperl_hash_from_tuple(tdata->tg_trigtuple,
1648 tupdesc));
1649 hv_store_string(hv, "new",
1650 plperl_hash_from_tuple(tdata->tg_newtuple,
1651 tupdesc));
1652 }
1653 }
1654 else if (TRIGGER_FIRED_BY_TRUNCATE(tdata->tg_event))
1655 event = "TRUNCATE";
1656 else
1657 event = "UNKNOWN";
1658
1659 hv_store_string(hv, "event", cstr2sv(event));
1660 hv_store_string(hv, "argc", newSViv(tdata->tg_trigger->tgnargs));
1661
1662 if (tdata->tg_trigger->tgnargs > 0)
1663 {
1664 AV *av = newAV();
1665
1666 av_extend(av, tdata->tg_trigger->tgnargs);
1667 for (i = 0; i < tdata->tg_trigger->tgnargs; i++)
1668 av_push(av, cstr2sv(tdata->tg_trigger->tgargs[i]));
1669 hv_store_string(hv, "args", newRV_noinc((SV *) av));
1670 }
1671
1672 hv_store_string(hv, "relname",
1673 cstr2sv(SPI_getrelname(tdata->tg_relation)));
1674
1675 hv_store_string(hv, "table_name",
1676 cstr2sv(SPI_getrelname(tdata->tg_relation)));
1677
1678 hv_store_string(hv, "table_schema",
1679 cstr2sv(SPI_getnspname(tdata->tg_relation)));
1680
1681 if (TRIGGER_FIRED_BEFORE(tdata->tg_event))
1682 when = "BEFORE";
1683 else if (TRIGGER_FIRED_AFTER(tdata->tg_event))
1684 when = "AFTER";
1685 else if (TRIGGER_FIRED_INSTEAD(tdata->tg_event))
1686 when = "INSTEAD OF";
1687 else
1688 when = "UNKNOWN";
1689 hv_store_string(hv, "when", cstr2sv(when));
1690
1691 if (TRIGGER_FIRED_FOR_ROW(tdata->tg_event))
1692 level = "ROW";
1693 else if (TRIGGER_FIRED_FOR_STATEMENT(tdata->tg_event))
1694 level = "STATEMENT";
1695 else
1696 level = "UNKNOWN";
1697 hv_store_string(hv, "level", cstr2sv(level));
1698
1699 return newRV_noinc((SV *) hv);
1700 }
1701
1702
1703 /* Set up the arguments for an event trigger call. */
1704 static SV *
plperl_event_trigger_build_args(FunctionCallInfo fcinfo)1705 plperl_event_trigger_build_args(FunctionCallInfo fcinfo)
1706 {
1707 dTHX;
1708 EventTriggerData *tdata;
1709 HV *hv;
1710
1711 hv = newHV();
1712
1713 tdata = (EventTriggerData *) fcinfo->context;
1714
1715 hv_store_string(hv, "event", cstr2sv(tdata->event));
1716 hv_store_string(hv, "tag", cstr2sv(tdata->tag));
1717
1718 return newRV_noinc((SV *) hv);
1719 }
1720
1721 /* Construct the modified new tuple to be returned from a trigger. */
1722 static HeapTuple
plperl_modify_tuple(HV * hvTD,TriggerData * tdata,HeapTuple otup)1723 plperl_modify_tuple(HV *hvTD, TriggerData *tdata, HeapTuple otup)
1724 {
1725 dTHX;
1726 SV **svp;
1727 HV *hvNew;
1728 HE *he;
1729 HeapTuple rtup;
1730 TupleDesc tupdesc;
1731 int natts;
1732 Datum *modvalues;
1733 bool *modnulls;
1734 bool *modrepls;
1735
1736 svp = hv_fetch_string(hvTD, "new");
1737 if (!svp)
1738 ereport(ERROR,
1739 (errcode(ERRCODE_UNDEFINED_COLUMN),
1740 errmsg("$_TD->{new} does not exist")));
1741 if (!SvOK(*svp) || !SvROK(*svp) || SvTYPE(SvRV(*svp)) != SVt_PVHV)
1742 ereport(ERROR,
1743 (errcode(ERRCODE_DATATYPE_MISMATCH),
1744 errmsg("$_TD->{new} is not a hash reference")));
1745 hvNew = (HV *) SvRV(*svp);
1746
1747 tupdesc = tdata->tg_relation->rd_att;
1748 natts = tupdesc->natts;
1749
1750 modvalues = (Datum *) palloc0(natts * sizeof(Datum));
1751 modnulls = (bool *) palloc0(natts * sizeof(bool));
1752 modrepls = (bool *) palloc0(natts * sizeof(bool));
1753
1754 hv_iterinit(hvNew);
1755 while ((he = hv_iternext(hvNew)))
1756 {
1757 char *key = hek2cstr(he);
1758 SV *val = HeVAL(he);
1759 int attn = SPI_fnumber(tupdesc, key);
1760
1761 if (attn == SPI_ERROR_NOATTRIBUTE)
1762 ereport(ERROR,
1763 (errcode(ERRCODE_UNDEFINED_COLUMN),
1764 errmsg("Perl hash contains nonexistent column \"%s\"",
1765 key)));
1766 if (attn <= 0)
1767 ereport(ERROR,
1768 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1769 errmsg("cannot set system attribute \"%s\"",
1770 key)));
1771
1772 modvalues[attn - 1] = plperl_sv_to_datum(val,
1773 tupdesc->attrs[attn - 1]->atttypid,
1774 tupdesc->attrs[attn - 1]->atttypmod,
1775 NULL,
1776 NULL,
1777 InvalidOid,
1778 &modnulls[attn - 1]);
1779 modrepls[attn - 1] = true;
1780
1781 pfree(key);
1782 }
1783 hv_iterinit(hvNew);
1784
1785 rtup = heap_modify_tuple(otup, tupdesc, modvalues, modnulls, modrepls);
1786
1787 pfree(modvalues);
1788 pfree(modnulls);
1789 pfree(modrepls);
1790
1791 return rtup;
1792 }
1793
1794
1795 /*
1796 * There are three externally visible pieces to plperl: plperl_call_handler,
1797 * plperl_inline_handler, and plperl_validator.
1798 */
1799
1800 /*
1801 * The call handler is called to run normal functions (including trigger
1802 * functions) that are defined in pg_proc.
1803 */
1804 PG_FUNCTION_INFO_V1(plperl_call_handler);
1805
1806 Datum
plperl_call_handler(PG_FUNCTION_ARGS)1807 plperl_call_handler(PG_FUNCTION_ARGS)
1808 {
1809 Datum retval;
1810 plperl_call_data *volatile save_call_data = current_call_data;
1811 plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1812 plperl_call_data this_call_data;
1813
1814 /* Initialize current-call status record */
1815 MemSet(&this_call_data, 0, sizeof(this_call_data));
1816 this_call_data.fcinfo = fcinfo;
1817
1818 PG_TRY();
1819 {
1820 current_call_data = &this_call_data;
1821 if (CALLED_AS_TRIGGER(fcinfo))
1822 retval = PointerGetDatum(plperl_trigger_handler(fcinfo));
1823 else if (CALLED_AS_EVENT_TRIGGER(fcinfo))
1824 {
1825 plperl_event_trigger_handler(fcinfo);
1826 retval = (Datum) 0;
1827 }
1828 else
1829 retval = plperl_func_handler(fcinfo);
1830 }
1831 PG_CATCH();
1832 {
1833 current_call_data = save_call_data;
1834 activate_interpreter(oldinterp);
1835 if (this_call_data.prodesc)
1836 decrement_prodesc_refcount(this_call_data.prodesc);
1837 PG_RE_THROW();
1838 }
1839 PG_END_TRY();
1840
1841 current_call_data = save_call_data;
1842 activate_interpreter(oldinterp);
1843 if (this_call_data.prodesc)
1844 decrement_prodesc_refcount(this_call_data.prodesc);
1845 return retval;
1846 }
1847
1848 /*
1849 * The inline handler runs anonymous code blocks (DO blocks).
1850 */
1851 PG_FUNCTION_INFO_V1(plperl_inline_handler);
1852
1853 Datum
plperl_inline_handler(PG_FUNCTION_ARGS)1854 plperl_inline_handler(PG_FUNCTION_ARGS)
1855 {
1856 InlineCodeBlock *codeblock = (InlineCodeBlock *) PG_GETARG_POINTER(0);
1857 FunctionCallInfoData fake_fcinfo;
1858 FmgrInfo flinfo;
1859 plperl_proc_desc desc;
1860 plperl_call_data *volatile save_call_data = current_call_data;
1861 plperl_interp_desc *volatile oldinterp = plperl_active_interp;
1862 plperl_call_data this_call_data;
1863 ErrorContextCallback pl_error_context;
1864
1865 /* Initialize current-call status record */
1866 MemSet(&this_call_data, 0, sizeof(this_call_data));
1867
1868 /* Set up a callback for error reporting */
1869 pl_error_context.callback = plperl_inline_callback;
1870 pl_error_context.previous = error_context_stack;
1871 pl_error_context.arg = NULL;
1872 error_context_stack = &pl_error_context;
1873
1874 /*
1875 * Set up a fake fcinfo and descriptor with just enough info to satisfy
1876 * plperl_call_perl_func(). In particular note that this sets things up
1877 * with no arguments passed, and a result type of VOID.
1878 */
1879 MemSet(&fake_fcinfo, 0, sizeof(fake_fcinfo));
1880 MemSet(&flinfo, 0, sizeof(flinfo));
1881 MemSet(&desc, 0, sizeof(desc));
1882 fake_fcinfo.flinfo = &flinfo;
1883 flinfo.fn_oid = InvalidOid;
1884 flinfo.fn_mcxt = CurrentMemoryContext;
1885
1886 desc.proname = "inline_code_block";
1887 desc.fn_readonly = false;
1888
1889 desc.lang_oid = codeblock->langOid;
1890 desc.trftypes = NIL;
1891 desc.lanpltrusted = codeblock->langIsTrusted;
1892
1893 desc.fn_retistuple = false;
1894 desc.fn_retisset = false;
1895 desc.fn_retisarray = false;
1896 desc.result_oid = VOIDOID;
1897 desc.nargs = 0;
1898 desc.reference = NULL;
1899
1900 this_call_data.fcinfo = &fake_fcinfo;
1901 this_call_data.prodesc = &desc;
1902 /* we do not bother with refcounting the fake prodesc */
1903
1904 PG_TRY();
1905 {
1906 SV *perlret;
1907
1908 current_call_data = &this_call_data;
1909
1910 if (SPI_connect() != SPI_OK_CONNECT)
1911 elog(ERROR, "could not connect to SPI manager");
1912
1913 select_perl_context(desc.lanpltrusted);
1914
1915 plperl_create_sub(&desc, codeblock->source_text, 0);
1916
1917 if (!desc.reference) /* can this happen? */
1918 elog(ERROR, "could not create internal procedure for anonymous code block");
1919
1920 perlret = plperl_call_perl_func(&desc, &fake_fcinfo);
1921
1922 SvREFCNT_dec_current(perlret);
1923
1924 if (SPI_finish() != SPI_OK_FINISH)
1925 elog(ERROR, "SPI_finish() failed");
1926 }
1927 PG_CATCH();
1928 {
1929 if (desc.reference)
1930 SvREFCNT_dec_current(desc.reference);
1931 current_call_data = save_call_data;
1932 activate_interpreter(oldinterp);
1933 PG_RE_THROW();
1934 }
1935 PG_END_TRY();
1936
1937 if (desc.reference)
1938 SvREFCNT_dec_current(desc.reference);
1939
1940 current_call_data = save_call_data;
1941 activate_interpreter(oldinterp);
1942
1943 error_context_stack = pl_error_context.previous;
1944
1945 PG_RETURN_VOID();
1946 }
1947
1948 /*
1949 * The validator is called during CREATE FUNCTION to validate the function
1950 * being created/replaced. The precise behavior of the validator may be
1951 * modified by the check_function_bodies GUC.
1952 */
1953 PG_FUNCTION_INFO_V1(plperl_validator);
1954
1955 Datum
plperl_validator(PG_FUNCTION_ARGS)1956 plperl_validator(PG_FUNCTION_ARGS)
1957 {
1958 Oid funcoid = PG_GETARG_OID(0);
1959 HeapTuple tuple;
1960 Form_pg_proc proc;
1961 char functyptype;
1962 int numargs;
1963 Oid *argtypes;
1964 char **argnames;
1965 char *argmodes;
1966 bool is_trigger = false;
1967 bool is_event_trigger = false;
1968 int i;
1969
1970 if (!CheckFunctionValidatorAccess(fcinfo->flinfo->fn_oid, funcoid))
1971 PG_RETURN_VOID();
1972
1973 /* Get the new function's pg_proc entry */
1974 tuple = SearchSysCache1(PROCOID, ObjectIdGetDatum(funcoid));
1975 if (!HeapTupleIsValid(tuple))
1976 elog(ERROR, "cache lookup failed for function %u", funcoid);
1977 proc = (Form_pg_proc) GETSTRUCT(tuple);
1978
1979 functyptype = get_typtype(proc->prorettype);
1980
1981 /* Disallow pseudotype result */
1982 /* except for TRIGGER, EVTTRIGGER, RECORD, or VOID */
1983 if (functyptype == TYPTYPE_PSEUDO)
1984 {
1985 /* we assume OPAQUE with no arguments means a trigger */
1986 if (proc->prorettype == TRIGGEROID ||
1987 (proc->prorettype == OPAQUEOID && proc->pronargs == 0))
1988 is_trigger = true;
1989 else if (proc->prorettype == EVTTRIGGEROID)
1990 is_event_trigger = true;
1991 else if (proc->prorettype != RECORDOID &&
1992 proc->prorettype != VOIDOID)
1993 ereport(ERROR,
1994 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
1995 errmsg("PL/Perl functions cannot return type %s",
1996 format_type_be(proc->prorettype))));
1997 }
1998
1999 /* Disallow pseudotypes in arguments (either IN or OUT) */
2000 numargs = get_func_arg_info(tuple,
2001 &argtypes, &argnames, &argmodes);
2002 for (i = 0; i < numargs; i++)
2003 {
2004 if (get_typtype(argtypes[i]) == TYPTYPE_PSEUDO &&
2005 argtypes[i] != RECORDOID)
2006 ereport(ERROR,
2007 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2008 errmsg("PL/Perl functions cannot accept type %s",
2009 format_type_be(argtypes[i]))));
2010 }
2011
2012 ReleaseSysCache(tuple);
2013
2014 /* Postpone body checks if !check_function_bodies */
2015 if (check_function_bodies)
2016 {
2017 (void) compile_plperl_function(funcoid, is_trigger, is_event_trigger);
2018 }
2019
2020 /* the result of a validator is ignored */
2021 PG_RETURN_VOID();
2022 }
2023
2024
2025 /*
2026 * plperlu likewise requires three externally visible functions:
2027 * plperlu_call_handler, plperlu_inline_handler, and plperlu_validator.
2028 * These are currently just aliases that send control to the plperl
2029 * handler functions, and we decide whether a particular function is
2030 * trusted or not by inspecting the actual pg_language tuple.
2031 */
2032
2033 PG_FUNCTION_INFO_V1(plperlu_call_handler);
2034
2035 Datum
plperlu_call_handler(PG_FUNCTION_ARGS)2036 plperlu_call_handler(PG_FUNCTION_ARGS)
2037 {
2038 return plperl_call_handler(fcinfo);
2039 }
2040
2041 PG_FUNCTION_INFO_V1(plperlu_inline_handler);
2042
2043 Datum
plperlu_inline_handler(PG_FUNCTION_ARGS)2044 plperlu_inline_handler(PG_FUNCTION_ARGS)
2045 {
2046 return plperl_inline_handler(fcinfo);
2047 }
2048
2049 PG_FUNCTION_INFO_V1(plperlu_validator);
2050
2051 Datum
plperlu_validator(PG_FUNCTION_ARGS)2052 plperlu_validator(PG_FUNCTION_ARGS)
2053 {
2054 /* call plperl validator with our fcinfo so it gets our oid */
2055 return plperl_validator(fcinfo);
2056 }
2057
2058
2059 /*
2060 * Uses mksafefunc/mkunsafefunc to create a subroutine whose text is
2061 * supplied in s, and returns a reference to it
2062 */
2063 static void
plperl_create_sub(plperl_proc_desc * prodesc,char * s,Oid fn_oid)2064 plperl_create_sub(plperl_proc_desc *prodesc, char *s, Oid fn_oid)
2065 {
2066 dTHX;
2067 dSP;
2068 char subname[NAMEDATALEN + 40];
2069 HV *pragma_hv = newHV();
2070 SV *subref = NULL;
2071 int count;
2072
2073 sprintf(subname, "%s__%u", prodesc->proname, fn_oid);
2074
2075 if (plperl_use_strict)
2076 hv_store_string(pragma_hv, "strict", (SV *) newAV());
2077
2078 ENTER;
2079 SAVETMPS;
2080 PUSHMARK(SP);
2081 EXTEND(SP, 4);
2082 PUSHs(sv_2mortal(cstr2sv(subname)));
2083 PUSHs(sv_2mortal(newRV_noinc((SV *) pragma_hv)));
2084
2085 /*
2086 * Use 'false' for $prolog in mkfunc, which is kept for compatibility in
2087 * case a module such as PostgreSQL::PLPerl::NYTprof replaces the function
2088 * compiler.
2089 */
2090 PUSHs(&PL_sv_no);
2091 PUSHs(sv_2mortal(cstr2sv(s)));
2092 PUTBACK;
2093
2094 /*
2095 * G_KEEPERR seems to be needed here, else we don't recognize compile
2096 * errors properly. Perhaps it's because there's another level of eval
2097 * inside mksafefunc?
2098 */
2099 count = perl_call_pv("PostgreSQL::InServer::mkfunc",
2100 G_SCALAR | G_EVAL | G_KEEPERR);
2101 SPAGAIN;
2102
2103 if (count == 1)
2104 {
2105 SV *sub_rv = (SV *) POPs;
2106
2107 if (sub_rv && SvROK(sub_rv) && SvTYPE(SvRV(sub_rv)) == SVt_PVCV)
2108 {
2109 subref = newRV_inc(SvRV(sub_rv));
2110 }
2111 }
2112
2113 PUTBACK;
2114 FREETMPS;
2115 LEAVE;
2116
2117 if (SvTRUE(ERRSV))
2118 ereport(ERROR,
2119 (errcode(ERRCODE_SYNTAX_ERROR),
2120 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2121
2122 if (!subref)
2123 ereport(ERROR,
2124 (errcode(ERRCODE_SYNTAX_ERROR),
2125 errmsg("didn't get a CODE reference from compiling function \"%s\"",
2126 prodesc->proname)));
2127
2128 prodesc->reference = subref;
2129
2130 return;
2131 }
2132
2133
2134 /**********************************************************************
2135 * plperl_init_shared_libs() -
2136 **********************************************************************/
2137
2138 static void
plperl_init_shared_libs(pTHX)2139 plperl_init_shared_libs(pTHX)
2140 {
2141 char *file = __FILE__;
2142
2143 newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
2144 newXS("PostgreSQL::InServer::Util::bootstrap",
2145 boot_PostgreSQL__InServer__Util, file);
2146 /* newXS for...::SPI::bootstrap is in select_perl_context() */
2147 }
2148
2149
2150 static SV *
plperl_call_perl_func(plperl_proc_desc * desc,FunctionCallInfo fcinfo)2151 plperl_call_perl_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo)
2152 {
2153 dTHX;
2154 dSP;
2155 SV *retval;
2156 int i;
2157 int count;
2158 Oid *argtypes = NULL;
2159 int nargs = 0;
2160
2161 ENTER;
2162 SAVETMPS;
2163
2164 PUSHMARK(SP);
2165 EXTEND(sp, desc->nargs);
2166
2167 /* Get signature for true functions; inline blocks have no args. */
2168 if (fcinfo->flinfo->fn_oid)
2169 get_func_signature(fcinfo->flinfo->fn_oid, &argtypes, &nargs);
2170 Assert(nargs == desc->nargs);
2171
2172 for (i = 0; i < desc->nargs; i++)
2173 {
2174 if (fcinfo->argnull[i])
2175 PUSHs(&PL_sv_undef);
2176 else if (desc->arg_is_rowtype[i])
2177 {
2178 SV *sv = plperl_hash_from_datum(fcinfo->arg[i]);
2179
2180 PUSHs(sv_2mortal(sv));
2181 }
2182 else
2183 {
2184 SV *sv;
2185 Oid funcid;
2186
2187 if (OidIsValid(desc->arg_arraytype[i]))
2188 sv = plperl_ref_from_pg_array(fcinfo->arg[i], desc->arg_arraytype[i]);
2189 else if ((funcid = get_transform_fromsql(argtypes[i], current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
2190 sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, fcinfo->arg[i]));
2191 else
2192 {
2193 char *tmp;
2194
2195 tmp = OutputFunctionCall(&(desc->arg_out_func[i]),
2196 fcinfo->arg[i]);
2197 sv = cstr2sv(tmp);
2198 pfree(tmp);
2199 }
2200
2201 PUSHs(sv_2mortal(sv));
2202 }
2203 }
2204 PUTBACK;
2205
2206 /* Do NOT use G_KEEPERR here */
2207 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2208
2209 SPAGAIN;
2210
2211 if (count != 1)
2212 {
2213 PUTBACK;
2214 FREETMPS;
2215 LEAVE;
2216 ereport(ERROR,
2217 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2218 errmsg("didn't get a return item from function")));
2219 }
2220
2221 if (SvTRUE(ERRSV))
2222 {
2223 (void) POPs;
2224 PUTBACK;
2225 FREETMPS;
2226 LEAVE;
2227 /* XXX need to find a way to determine a better errcode here */
2228 ereport(ERROR,
2229 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2230 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2231 }
2232
2233 retval = newSVsv(POPs);
2234
2235 PUTBACK;
2236 FREETMPS;
2237 LEAVE;
2238
2239 return retval;
2240 }
2241
2242
2243 static SV *
plperl_call_perl_trigger_func(plperl_proc_desc * desc,FunctionCallInfo fcinfo,SV * td)2244 plperl_call_perl_trigger_func(plperl_proc_desc *desc, FunctionCallInfo fcinfo,
2245 SV *td)
2246 {
2247 dTHX;
2248 dSP;
2249 SV *retval,
2250 *TDsv;
2251 int i,
2252 count;
2253 Trigger *tg_trigger = ((TriggerData *) fcinfo->context)->tg_trigger;
2254
2255 ENTER;
2256 SAVETMPS;
2257
2258 TDsv = get_sv("main::_TD", 0);
2259 if (!TDsv)
2260 ereport(ERROR,
2261 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2262 errmsg("couldn't fetch $_TD")));
2263
2264 save_item(TDsv); /* local $_TD */
2265 sv_setsv(TDsv, td);
2266
2267 PUSHMARK(sp);
2268 EXTEND(sp, tg_trigger->tgnargs);
2269
2270 for (i = 0; i < tg_trigger->tgnargs; i++)
2271 PUSHs(sv_2mortal(cstr2sv(tg_trigger->tgargs[i])));
2272 PUTBACK;
2273
2274 /* Do NOT use G_KEEPERR here */
2275 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2276
2277 SPAGAIN;
2278
2279 if (count != 1)
2280 {
2281 PUTBACK;
2282 FREETMPS;
2283 LEAVE;
2284 ereport(ERROR,
2285 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2286 errmsg("didn't get a return item from trigger function")));
2287 }
2288
2289 if (SvTRUE(ERRSV))
2290 {
2291 (void) POPs;
2292 PUTBACK;
2293 FREETMPS;
2294 LEAVE;
2295 /* XXX need to find a way to determine a better errcode here */
2296 ereport(ERROR,
2297 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2298 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2299 }
2300
2301 retval = newSVsv(POPs);
2302
2303 PUTBACK;
2304 FREETMPS;
2305 LEAVE;
2306
2307 return retval;
2308 }
2309
2310
2311 static void
plperl_call_perl_event_trigger_func(plperl_proc_desc * desc,FunctionCallInfo fcinfo,SV * td)2312 plperl_call_perl_event_trigger_func(plperl_proc_desc *desc,
2313 FunctionCallInfo fcinfo,
2314 SV *td)
2315 {
2316 dTHX;
2317 dSP;
2318 SV *retval,
2319 *TDsv;
2320 int count;
2321
2322 ENTER;
2323 SAVETMPS;
2324
2325 TDsv = get_sv("main::_TD", 0);
2326 if (!TDsv)
2327 ereport(ERROR,
2328 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2329 errmsg("couldn't fetch $_TD")));
2330
2331 save_item(TDsv); /* local $_TD */
2332 sv_setsv(TDsv, td);
2333
2334 PUSHMARK(sp);
2335 PUTBACK;
2336
2337 /* Do NOT use G_KEEPERR here */
2338 count = perl_call_sv(desc->reference, G_SCALAR | G_EVAL);
2339
2340 SPAGAIN;
2341
2342 if (count != 1)
2343 {
2344 PUTBACK;
2345 FREETMPS;
2346 LEAVE;
2347 ereport(ERROR,
2348 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2349 errmsg("didn't get a return item from trigger function")));
2350 }
2351
2352 if (SvTRUE(ERRSV))
2353 {
2354 (void) POPs;
2355 PUTBACK;
2356 FREETMPS;
2357 LEAVE;
2358 /* XXX need to find a way to determine a better errcode here */
2359 ereport(ERROR,
2360 (errcode(ERRCODE_EXTERNAL_ROUTINE_EXCEPTION),
2361 errmsg("%s", strip_trailing_ws(sv2cstr(ERRSV)))));
2362 }
2363
2364 retval = newSVsv(POPs);
2365 (void) retval; /* silence compiler warning */
2366
2367 PUTBACK;
2368 FREETMPS;
2369 LEAVE;
2370
2371 return;
2372 }
2373
2374 static Datum
plperl_func_handler(PG_FUNCTION_ARGS)2375 plperl_func_handler(PG_FUNCTION_ARGS)
2376 {
2377 plperl_proc_desc *prodesc;
2378 SV *perlret;
2379 Datum retval = 0;
2380 ReturnSetInfo *rsi;
2381 ErrorContextCallback pl_error_context;
2382
2383 if (SPI_connect() != SPI_OK_CONNECT)
2384 elog(ERROR, "could not connect to SPI manager");
2385
2386 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, false);
2387 current_call_data->prodesc = prodesc;
2388 increment_prodesc_refcount(prodesc);
2389
2390 /* Set a callback for error reporting */
2391 pl_error_context.callback = plperl_exec_callback;
2392 pl_error_context.previous = error_context_stack;
2393 pl_error_context.arg = prodesc->proname;
2394 error_context_stack = &pl_error_context;
2395
2396 rsi = (ReturnSetInfo *) fcinfo->resultinfo;
2397
2398 if (prodesc->fn_retisset)
2399 {
2400 /* Check context before allowing the call to go through */
2401 if (!rsi || !IsA(rsi, ReturnSetInfo) ||
2402 (rsi->allowedModes & SFRM_Materialize) == 0 ||
2403 rsi->expectedDesc == NULL)
2404 ereport(ERROR,
2405 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2406 errmsg("set-valued function called in context that "
2407 "cannot accept a set")));
2408 }
2409
2410 activate_interpreter(prodesc->interp);
2411
2412 perlret = plperl_call_perl_func(prodesc, fcinfo);
2413
2414 /************************************************************
2415 * Disconnect from SPI manager and then create the return
2416 * values datum (if the input function does a palloc for it
2417 * this must not be allocated in the SPI memory context
2418 * because SPI_finish would free it).
2419 ************************************************************/
2420 if (SPI_finish() != SPI_OK_FINISH)
2421 elog(ERROR, "SPI_finish() failed");
2422
2423 if (prodesc->fn_retisset)
2424 {
2425 SV *sav;
2426
2427 /*
2428 * If the Perl function returned an arrayref, we pretend that it
2429 * called return_next() for each element of the array, to handle old
2430 * SRFs that didn't know about return_next(). Any other sort of return
2431 * value is an error, except undef which means return an empty set.
2432 */
2433 sav = get_perl_array_ref(perlret);
2434 if (sav)
2435 {
2436 dTHX;
2437 int i = 0;
2438 SV **svp = 0;
2439 AV *rav = (AV *) SvRV(sav);
2440
2441 while ((svp = av_fetch(rav, i, FALSE)) != NULL)
2442 {
2443 plperl_return_next_internal(*svp);
2444 i++;
2445 }
2446 }
2447 else if (SvOK(perlret))
2448 {
2449 ereport(ERROR,
2450 (errcode(ERRCODE_DATATYPE_MISMATCH),
2451 errmsg("set-returning PL/Perl function must return "
2452 "reference to array or use return_next")));
2453 }
2454
2455 rsi->returnMode = SFRM_Materialize;
2456 if (current_call_data->tuple_store)
2457 {
2458 rsi->setResult = current_call_data->tuple_store;
2459 rsi->setDesc = current_call_data->ret_tdesc;
2460 }
2461 retval = (Datum) 0;
2462 }
2463 else
2464 {
2465 retval = plperl_sv_to_datum(perlret,
2466 prodesc->result_oid,
2467 -1,
2468 fcinfo,
2469 &prodesc->result_in_func,
2470 prodesc->result_typioparam,
2471 &fcinfo->isnull);
2472
2473 if (fcinfo->isnull && rsi && IsA(rsi, ReturnSetInfo))
2474 rsi->isDone = ExprEndResult;
2475 }
2476
2477 /* Restore the previous error callback */
2478 error_context_stack = pl_error_context.previous;
2479
2480 SvREFCNT_dec_current(perlret);
2481
2482 return retval;
2483 }
2484
2485
2486 static Datum
plperl_trigger_handler(PG_FUNCTION_ARGS)2487 plperl_trigger_handler(PG_FUNCTION_ARGS)
2488 {
2489 plperl_proc_desc *prodesc;
2490 SV *perlret;
2491 Datum retval;
2492 SV *svTD;
2493 HV *hvTD;
2494 ErrorContextCallback pl_error_context;
2495 TriggerData *tdata;
2496 int rc PG_USED_FOR_ASSERTS_ONLY;
2497
2498 /* Connect to SPI manager */
2499 if (SPI_connect() != SPI_OK_CONNECT)
2500 elog(ERROR, "could not connect to SPI manager");
2501
2502 /* Make transition tables visible to this SPI connection */
2503 tdata = (TriggerData *) fcinfo->context;
2504 rc = SPI_register_trigger_data(tdata);
2505 Assert(rc >= 0);
2506
2507 /* Find or compile the function */
2508 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, true, false);
2509 current_call_data->prodesc = prodesc;
2510 increment_prodesc_refcount(prodesc);
2511
2512 /* Set a callback for error reporting */
2513 pl_error_context.callback = plperl_exec_callback;
2514 pl_error_context.previous = error_context_stack;
2515 pl_error_context.arg = prodesc->proname;
2516 error_context_stack = &pl_error_context;
2517
2518 activate_interpreter(prodesc->interp);
2519
2520 svTD = plperl_trigger_build_args(fcinfo);
2521 perlret = plperl_call_perl_trigger_func(prodesc, fcinfo, svTD);
2522 hvTD = (HV *) SvRV(svTD);
2523
2524 /************************************************************
2525 * Disconnect from SPI manager and then create the return
2526 * values datum (if the input function does a palloc for it
2527 * this must not be allocated in the SPI memory context
2528 * because SPI_finish would free it).
2529 ************************************************************/
2530 if (SPI_finish() != SPI_OK_FINISH)
2531 elog(ERROR, "SPI_finish() failed");
2532
2533 if (perlret == NULL || !SvOK(perlret))
2534 {
2535 /* undef result means go ahead with original tuple */
2536 TriggerData *trigdata = ((TriggerData *) fcinfo->context);
2537
2538 if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2539 retval = (Datum) trigdata->tg_trigtuple;
2540 else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2541 retval = (Datum) trigdata->tg_newtuple;
2542 else if (TRIGGER_FIRED_BY_DELETE(trigdata->tg_event))
2543 retval = (Datum) trigdata->tg_trigtuple;
2544 else if (TRIGGER_FIRED_BY_TRUNCATE(trigdata->tg_event))
2545 retval = (Datum) trigdata->tg_trigtuple;
2546 else
2547 retval = (Datum) 0; /* can this happen? */
2548 }
2549 else
2550 {
2551 HeapTuple trv;
2552 char *tmp;
2553
2554 tmp = sv2cstr(perlret);
2555
2556 if (pg_strcasecmp(tmp, "SKIP") == 0)
2557 trv = NULL;
2558 else if (pg_strcasecmp(tmp, "MODIFY") == 0)
2559 {
2560 TriggerData *trigdata = (TriggerData *) fcinfo->context;
2561
2562 if (TRIGGER_FIRED_BY_INSERT(trigdata->tg_event))
2563 trv = plperl_modify_tuple(hvTD, trigdata,
2564 trigdata->tg_trigtuple);
2565 else if (TRIGGER_FIRED_BY_UPDATE(trigdata->tg_event))
2566 trv = plperl_modify_tuple(hvTD, trigdata,
2567 trigdata->tg_newtuple);
2568 else
2569 {
2570 ereport(WARNING,
2571 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2572 errmsg("ignoring modified row in DELETE trigger")));
2573 trv = NULL;
2574 }
2575 }
2576 else
2577 {
2578 ereport(ERROR,
2579 (errcode(ERRCODE_E_R_I_E_TRIGGER_PROTOCOL_VIOLATED),
2580 errmsg("result of PL/Perl trigger function must be undef, "
2581 "\"SKIP\", or \"MODIFY\"")));
2582 trv = NULL;
2583 }
2584 retval = PointerGetDatum(trv);
2585 pfree(tmp);
2586 }
2587
2588 /* Restore the previous error callback */
2589 error_context_stack = pl_error_context.previous;
2590
2591 SvREFCNT_dec_current(svTD);
2592 if (perlret)
2593 SvREFCNT_dec_current(perlret);
2594
2595 return retval;
2596 }
2597
2598
2599 static void
plperl_event_trigger_handler(PG_FUNCTION_ARGS)2600 plperl_event_trigger_handler(PG_FUNCTION_ARGS)
2601 {
2602 plperl_proc_desc *prodesc;
2603 SV *svTD;
2604 ErrorContextCallback pl_error_context;
2605
2606 /* Connect to SPI manager */
2607 if (SPI_connect() != SPI_OK_CONNECT)
2608 elog(ERROR, "could not connect to SPI manager");
2609
2610 /* Find or compile the function */
2611 prodesc = compile_plperl_function(fcinfo->flinfo->fn_oid, false, true);
2612 current_call_data->prodesc = prodesc;
2613 increment_prodesc_refcount(prodesc);
2614
2615 /* Set a callback for error reporting */
2616 pl_error_context.callback = plperl_exec_callback;
2617 pl_error_context.previous = error_context_stack;
2618 pl_error_context.arg = prodesc->proname;
2619 error_context_stack = &pl_error_context;
2620
2621 activate_interpreter(prodesc->interp);
2622
2623 svTD = plperl_event_trigger_build_args(fcinfo);
2624 plperl_call_perl_event_trigger_func(prodesc, fcinfo, svTD);
2625
2626 if (SPI_finish() != SPI_OK_FINISH)
2627 elog(ERROR, "SPI_finish() failed");
2628
2629 /* Restore the previous error callback */
2630 error_context_stack = pl_error_context.previous;
2631
2632 SvREFCNT_dec_current(svTD);
2633 }
2634
2635
2636 static bool
validate_plperl_function(plperl_proc_ptr * proc_ptr,HeapTuple procTup)2637 validate_plperl_function(plperl_proc_ptr *proc_ptr, HeapTuple procTup)
2638 {
2639 if (proc_ptr && proc_ptr->proc_ptr)
2640 {
2641 plperl_proc_desc *prodesc = proc_ptr->proc_ptr;
2642 bool uptodate;
2643
2644 /************************************************************
2645 * If it's present, must check whether it's still up to date.
2646 * This is needed because CREATE OR REPLACE FUNCTION can modify the
2647 * function's pg_proc entry without changing its OID.
2648 ************************************************************/
2649 uptodate = (prodesc->fn_xmin == HeapTupleHeaderGetRawXmin(procTup->t_data) &&
2650 ItemPointerEquals(&prodesc->fn_tid, &procTup->t_self));
2651
2652 if (uptodate)
2653 return true;
2654
2655 /* Otherwise, unlink the obsoleted entry from the hashtable ... */
2656 proc_ptr->proc_ptr = NULL;
2657 /* ... and release the corresponding refcount, probably deleting it */
2658 decrement_prodesc_refcount(prodesc);
2659 }
2660
2661 return false;
2662 }
2663
2664
2665 static void
free_plperl_function(plperl_proc_desc * prodesc)2666 free_plperl_function(plperl_proc_desc *prodesc)
2667 {
2668 Assert(prodesc->fn_refcount == 0);
2669 /* Release CODE reference, if we have one, from the appropriate interp */
2670 if (prodesc->reference)
2671 {
2672 plperl_interp_desc *oldinterp = plperl_active_interp;
2673
2674 activate_interpreter(prodesc->interp);
2675 SvREFCNT_dec_current(prodesc->reference);
2676 activate_interpreter(oldinterp);
2677 }
2678 /* Release all PG-owned data for this proc */
2679 MemoryContextDelete(prodesc->fn_cxt);
2680 }
2681
2682
2683 static plperl_proc_desc *
compile_plperl_function(Oid fn_oid,bool is_trigger,bool is_event_trigger)2684 compile_plperl_function(Oid fn_oid, bool is_trigger, bool is_event_trigger)
2685 {
2686 HeapTuple procTup;
2687 Form_pg_proc procStruct;
2688 plperl_proc_key proc_key;
2689 plperl_proc_ptr *proc_ptr;
2690 plperl_proc_desc *volatile prodesc = NULL;
2691 volatile MemoryContext proc_cxt = NULL;
2692 plperl_interp_desc *oldinterp = plperl_active_interp;
2693 ErrorContextCallback plperl_error_context;
2694
2695 /* We'll need the pg_proc tuple in any case... */
2696 procTup = SearchSysCache1(PROCOID, ObjectIdGetDatum(fn_oid));
2697 if (!HeapTupleIsValid(procTup))
2698 elog(ERROR, "cache lookup failed for function %u", fn_oid);
2699 procStruct = (Form_pg_proc) GETSTRUCT(procTup);
2700
2701 /*
2702 * Try to find function in plperl_proc_hash. The reason for this
2703 * overcomplicated-seeming lookup procedure is that we don't know whether
2704 * it's plperl or plperlu, and don't want to spend a lookup in pg_language
2705 * to find out.
2706 */
2707 proc_key.proc_id = fn_oid;
2708 proc_key.is_trigger = is_trigger;
2709 proc_key.user_id = GetUserId();
2710 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2711 HASH_FIND, NULL);
2712 if (validate_plperl_function(proc_ptr, procTup))
2713 {
2714 /* Found valid plperl entry */
2715 ReleaseSysCache(procTup);
2716 return proc_ptr->proc_ptr;
2717 }
2718
2719 /* If not found or obsolete, maybe it's plperlu */
2720 proc_key.user_id = InvalidOid;
2721 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2722 HASH_FIND, NULL);
2723 if (validate_plperl_function(proc_ptr, procTup))
2724 {
2725 /* Found valid plperlu entry */
2726 ReleaseSysCache(procTup);
2727 return proc_ptr->proc_ptr;
2728 }
2729
2730 /************************************************************
2731 * If we haven't found it in the hashtable, we analyze
2732 * the function's arguments and return type and store
2733 * the in-/out-functions in the prodesc block,
2734 * then we load the procedure into the Perl interpreter,
2735 * and last we create a new hashtable entry for it.
2736 ************************************************************/
2737
2738 /* Set a callback for reporting compilation errors */
2739 plperl_error_context.callback = plperl_compile_callback;
2740 plperl_error_context.previous = error_context_stack;
2741 plperl_error_context.arg = NameStr(procStruct->proname);
2742 error_context_stack = &plperl_error_context;
2743
2744 PG_TRY();
2745 {
2746 HeapTuple langTup;
2747 HeapTuple typeTup;
2748 Form_pg_language langStruct;
2749 Form_pg_type typeStruct;
2750 Datum protrftypes_datum;
2751 Datum prosrcdatum;
2752 bool isnull;
2753 char *proc_source;
2754 MemoryContext oldcontext;
2755
2756 /************************************************************
2757 * Allocate a context that will hold all PG data for the procedure.
2758 ************************************************************/
2759 proc_cxt = AllocSetContextCreate(TopMemoryContext,
2760 NameStr(procStruct->proname),
2761 ALLOCSET_SMALL_SIZES);
2762
2763 /************************************************************
2764 * Allocate and fill a new procedure description block.
2765 * struct prodesc and subsidiary data must all live in proc_cxt.
2766 ************************************************************/
2767 oldcontext = MemoryContextSwitchTo(proc_cxt);
2768 prodesc = (plperl_proc_desc *) palloc0(sizeof(plperl_proc_desc));
2769 prodesc->proname = pstrdup(NameStr(procStruct->proname));
2770 prodesc->fn_cxt = proc_cxt;
2771 prodesc->fn_refcount = 0;
2772 prodesc->fn_xmin = HeapTupleHeaderGetRawXmin(procTup->t_data);
2773 prodesc->fn_tid = procTup->t_self;
2774 prodesc->nargs = procStruct->pronargs;
2775 prodesc->arg_out_func = (FmgrInfo *) palloc0(prodesc->nargs * sizeof(FmgrInfo));
2776 prodesc->arg_is_rowtype = (bool *) palloc0(prodesc->nargs * sizeof(bool));
2777 prodesc->arg_arraytype = (Oid *) palloc0(prodesc->nargs * sizeof(Oid));
2778 MemoryContextSwitchTo(oldcontext);
2779
2780 /* Remember if function is STABLE/IMMUTABLE */
2781 prodesc->fn_readonly =
2782 (procStruct->provolatile != PROVOLATILE_VOLATILE);
2783
2784 /* Fetch protrftypes */
2785 protrftypes_datum = SysCacheGetAttr(PROCOID, procTup,
2786 Anum_pg_proc_protrftypes, &isnull);
2787 MemoryContextSwitchTo(proc_cxt);
2788 prodesc->trftypes = isnull ? NIL : oid_array_to_list(protrftypes_datum);
2789 MemoryContextSwitchTo(oldcontext);
2790
2791 /************************************************************
2792 * Lookup the pg_language tuple by Oid
2793 ************************************************************/
2794 langTup = SearchSysCache1(LANGOID,
2795 ObjectIdGetDatum(procStruct->prolang));
2796 if (!HeapTupleIsValid(langTup))
2797 elog(ERROR, "cache lookup failed for language %u",
2798 procStruct->prolang);
2799 langStruct = (Form_pg_language) GETSTRUCT(langTup);
2800 prodesc->lang_oid = HeapTupleGetOid(langTup);
2801 prodesc->lanpltrusted = langStruct->lanpltrusted;
2802 ReleaseSysCache(langTup);
2803
2804 /************************************************************
2805 * Get the required information for input conversion of the
2806 * return value.
2807 ************************************************************/
2808 if (!is_trigger && !is_event_trigger)
2809 {
2810 typeTup =
2811 SearchSysCache1(TYPEOID,
2812 ObjectIdGetDatum(procStruct->prorettype));
2813 if (!HeapTupleIsValid(typeTup))
2814 elog(ERROR, "cache lookup failed for type %u",
2815 procStruct->prorettype);
2816 typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2817
2818 /* Disallow pseudotype result, except VOID or RECORD */
2819 if (typeStruct->typtype == TYPTYPE_PSEUDO)
2820 {
2821 if (procStruct->prorettype == VOIDOID ||
2822 procStruct->prorettype == RECORDOID)
2823 /* okay */ ;
2824 else if (procStruct->prorettype == TRIGGEROID ||
2825 procStruct->prorettype == EVTTRIGGEROID)
2826 ereport(ERROR,
2827 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2828 errmsg("trigger functions can only be called "
2829 "as triggers")));
2830 else
2831 ereport(ERROR,
2832 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2833 errmsg("PL/Perl functions cannot return type %s",
2834 format_type_be(procStruct->prorettype))));
2835 }
2836
2837 prodesc->result_oid = procStruct->prorettype;
2838 prodesc->fn_retisset = procStruct->proretset;
2839 prodesc->fn_retistuple = (procStruct->prorettype == RECORDOID ||
2840 typeStruct->typtype == TYPTYPE_COMPOSITE);
2841
2842 prodesc->fn_retisarray =
2843 (typeStruct->typlen == -1 && typeStruct->typelem);
2844
2845 fmgr_info_cxt(typeStruct->typinput,
2846 &(prodesc->result_in_func),
2847 proc_cxt);
2848 prodesc->result_typioparam = getTypeIOParam(typeTup);
2849
2850 ReleaseSysCache(typeTup);
2851 }
2852
2853 /************************************************************
2854 * Get the required information for output conversion
2855 * of all procedure arguments
2856 ************************************************************/
2857 if (!is_trigger && !is_event_trigger)
2858 {
2859 int i;
2860
2861 for (i = 0; i < prodesc->nargs; i++)
2862 {
2863 typeTup = SearchSysCache1(TYPEOID,
2864 ObjectIdGetDatum(procStruct->proargtypes.values[i]));
2865 if (!HeapTupleIsValid(typeTup))
2866 elog(ERROR, "cache lookup failed for type %u",
2867 procStruct->proargtypes.values[i]);
2868 typeStruct = (Form_pg_type) GETSTRUCT(typeTup);
2869
2870 /* Disallow pseudotype argument */
2871 if (typeStruct->typtype == TYPTYPE_PSEUDO &&
2872 procStruct->proargtypes.values[i] != RECORDOID)
2873 ereport(ERROR,
2874 (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
2875 errmsg("PL/Perl functions cannot accept type %s",
2876 format_type_be(procStruct->proargtypes.values[i]))));
2877
2878 if (typeStruct->typtype == TYPTYPE_COMPOSITE ||
2879 procStruct->proargtypes.values[i] == RECORDOID)
2880 prodesc->arg_is_rowtype[i] = true;
2881 else
2882 {
2883 prodesc->arg_is_rowtype[i] = false;
2884 fmgr_info_cxt(typeStruct->typoutput,
2885 &(prodesc->arg_out_func[i]),
2886 proc_cxt);
2887 }
2888
2889 /* Identify array attributes */
2890 if (typeStruct->typelem != 0 && typeStruct->typlen == -1)
2891 prodesc->arg_arraytype[i] = procStruct->proargtypes.values[i];
2892 else
2893 prodesc->arg_arraytype[i] = InvalidOid;
2894
2895 ReleaseSysCache(typeTup);
2896 }
2897 }
2898
2899 /************************************************************
2900 * create the text of the anonymous subroutine.
2901 * we do not use a named subroutine so that we can call directly
2902 * through the reference.
2903 ************************************************************/
2904 prosrcdatum = SysCacheGetAttr(PROCOID, procTup,
2905 Anum_pg_proc_prosrc, &isnull);
2906 if (isnull)
2907 elog(ERROR, "null prosrc");
2908 proc_source = TextDatumGetCString(prosrcdatum);
2909
2910 /************************************************************
2911 * Create the procedure in the appropriate interpreter
2912 ************************************************************/
2913
2914 select_perl_context(prodesc->lanpltrusted);
2915
2916 prodesc->interp = plperl_active_interp;
2917
2918 plperl_create_sub(prodesc, proc_source, fn_oid);
2919
2920 activate_interpreter(oldinterp);
2921
2922 pfree(proc_source);
2923
2924 if (!prodesc->reference) /* can this happen? */
2925 elog(ERROR, "could not create PL/Perl internal procedure");
2926
2927 /************************************************************
2928 * OK, link the procedure into the correct hashtable entry.
2929 * Note we assume that the hashtable entry either doesn't exist yet,
2930 * or we already cleared its proc_ptr during the validation attempts
2931 * above. So no need to decrement an old refcount here.
2932 ************************************************************/
2933 proc_key.user_id = prodesc->lanpltrusted ? GetUserId() : InvalidOid;
2934
2935 proc_ptr = hash_search(plperl_proc_hash, &proc_key,
2936 HASH_ENTER, NULL);
2937 /* We assume these two steps can't throw an error: */
2938 proc_ptr->proc_ptr = prodesc;
2939 increment_prodesc_refcount(prodesc);
2940 }
2941 PG_CATCH();
2942 {
2943 /*
2944 * If we got as far as creating a reference, we should be able to use
2945 * free_plperl_function() to clean up. If not, then at most we have
2946 * some PG memory resources in proc_cxt, which we can just delete.
2947 */
2948 if (prodesc && prodesc->reference)
2949 free_plperl_function(prodesc);
2950 else if (proc_cxt)
2951 MemoryContextDelete(proc_cxt);
2952
2953 /* Be sure to restore the previous interpreter, too, for luck */
2954 activate_interpreter(oldinterp);
2955
2956 PG_RE_THROW();
2957 }
2958 PG_END_TRY();
2959
2960 /* restore previous error callback */
2961 error_context_stack = plperl_error_context.previous;
2962
2963 ReleaseSysCache(procTup);
2964
2965 return prodesc;
2966 }
2967
2968 /* Build a hash from a given composite/row datum */
2969 static SV *
plperl_hash_from_datum(Datum attr)2970 plperl_hash_from_datum(Datum attr)
2971 {
2972 HeapTupleHeader td;
2973 Oid tupType;
2974 int32 tupTypmod;
2975 TupleDesc tupdesc;
2976 HeapTupleData tmptup;
2977 SV *sv;
2978
2979 td = DatumGetHeapTupleHeader(attr);
2980
2981 /* Extract rowtype info and find a tupdesc */
2982 tupType = HeapTupleHeaderGetTypeId(td);
2983 tupTypmod = HeapTupleHeaderGetTypMod(td);
2984 tupdesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
2985
2986 /* Build a temporary HeapTuple control structure */
2987 tmptup.t_len = HeapTupleHeaderGetDatumLength(td);
2988 tmptup.t_data = td;
2989
2990 sv = plperl_hash_from_tuple(&tmptup, tupdesc);
2991 ReleaseTupleDesc(tupdesc);
2992
2993 return sv;
2994 }
2995
2996 /* Build a hash from all attributes of a given tuple. */
2997 static SV *
plperl_hash_from_tuple(HeapTuple tuple,TupleDesc tupdesc)2998 plperl_hash_from_tuple(HeapTuple tuple, TupleDesc tupdesc)
2999 {
3000 dTHX;
3001 HV *hv;
3002 int i;
3003
3004 /* since this function recurses, it could be driven to stack overflow */
3005 check_stack_depth();
3006
3007 hv = newHV();
3008 hv_ksplit(hv, tupdesc->natts); /* pre-grow the hash */
3009
3010 for (i = 0; i < tupdesc->natts; i++)
3011 {
3012 Datum attr;
3013 bool isnull,
3014 typisvarlena;
3015 char *attname;
3016 Oid typoutput;
3017
3018 if (tupdesc->attrs[i]->attisdropped)
3019 continue;
3020
3021 attname = NameStr(tupdesc->attrs[i]->attname);
3022 attr = heap_getattr(tuple, i + 1, tupdesc, &isnull);
3023
3024 if (isnull)
3025 {
3026 /*
3027 * Store (attname => undef) and move on. Note we can't use
3028 * &PL_sv_undef here; see "AVs, HVs and undefined values" in
3029 * perlguts for an explanation.
3030 */
3031 hv_store_string(hv, attname, newSV(0));
3032 continue;
3033 }
3034
3035 if (type_is_rowtype(tupdesc->attrs[i]->atttypid))
3036 {
3037 SV *sv = plperl_hash_from_datum(attr);
3038
3039 hv_store_string(hv, attname, sv);
3040 }
3041 else
3042 {
3043 SV *sv;
3044 Oid funcid;
3045
3046 if (OidIsValid(get_base_element_type(tupdesc->attrs[i]->atttypid)))
3047 sv = plperl_ref_from_pg_array(attr, tupdesc->attrs[i]->atttypid);
3048 else if ((funcid = get_transform_fromsql(tupdesc->attrs[i]->atttypid, current_call_data->prodesc->lang_oid, current_call_data->prodesc->trftypes)))
3049 sv = (SV *) DatumGetPointer(OidFunctionCall1(funcid, attr));
3050 else
3051 {
3052 char *outputstr;
3053
3054 /* XXX should have a way to cache these lookups */
3055 getTypeOutputInfo(tupdesc->attrs[i]->atttypid,
3056 &typoutput, &typisvarlena);
3057
3058 outputstr = OidOutputFunctionCall(typoutput, attr);
3059 sv = cstr2sv(outputstr);
3060 pfree(outputstr);
3061 }
3062
3063 hv_store_string(hv, attname, sv);
3064 }
3065 }
3066 return newRV_noinc((SV *) hv);
3067 }
3068
3069
3070 static void
check_spi_usage_allowed(void)3071 check_spi_usage_allowed(void)
3072 {
3073 /* see comment in plperl_fini() */
3074 if (plperl_ending)
3075 {
3076 /* simple croak as we don't want to involve PostgreSQL code */
3077 croak("SPI functions can not be used in END blocks");
3078 }
3079 }
3080
3081
3082 HV *
plperl_spi_exec(char * query,int limit)3083 plperl_spi_exec(char *query, int limit)
3084 {
3085 HV *ret_hv;
3086
3087 /*
3088 * Execute the query inside a sub-transaction, so we can cope with errors
3089 * sanely
3090 */
3091 MemoryContext oldcontext = CurrentMemoryContext;
3092 ResourceOwner oldowner = CurrentResourceOwner;
3093
3094 check_spi_usage_allowed();
3095
3096 BeginInternalSubTransaction(NULL);
3097 /* Want to run inside function's memory context */
3098 MemoryContextSwitchTo(oldcontext);
3099
3100 PG_TRY();
3101 {
3102 int spi_rv;
3103
3104 pg_verifymbstr(query, strlen(query), false);
3105
3106 spi_rv = SPI_execute(query, current_call_data->prodesc->fn_readonly,
3107 limit);
3108 ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
3109 spi_rv);
3110
3111 /* Commit the inner transaction, return to outer xact context */
3112 ReleaseCurrentSubTransaction();
3113 MemoryContextSwitchTo(oldcontext);
3114 CurrentResourceOwner = oldowner;
3115 }
3116 PG_CATCH();
3117 {
3118 ErrorData *edata;
3119
3120 /* Save error info */
3121 MemoryContextSwitchTo(oldcontext);
3122 edata = CopyErrorData();
3123 FlushErrorState();
3124
3125 /* Abort the inner transaction */
3126 RollbackAndReleaseCurrentSubTransaction();
3127 MemoryContextSwitchTo(oldcontext);
3128 CurrentResourceOwner = oldowner;
3129
3130 /* Punt the error to Perl */
3131 croak_cstr(edata->message);
3132
3133 /* Can't get here, but keep compiler quiet */
3134 return NULL;
3135 }
3136 PG_END_TRY();
3137
3138 return ret_hv;
3139 }
3140
3141
3142 static HV *
plperl_spi_execute_fetch_result(SPITupleTable * tuptable,uint64 processed,int status)3143 plperl_spi_execute_fetch_result(SPITupleTable *tuptable, uint64 processed,
3144 int status)
3145 {
3146 dTHX;
3147 HV *result;
3148
3149 check_spi_usage_allowed();
3150
3151 result = newHV();
3152
3153 hv_store_string(result, "status",
3154 cstr2sv(SPI_result_code_string(status)));
3155 hv_store_string(result, "processed",
3156 (processed > (uint64) UV_MAX) ?
3157 newSVnv((NV) processed) :
3158 newSVuv((UV) processed));
3159
3160 if (status > 0 && tuptable)
3161 {
3162 AV *rows;
3163 SV *row;
3164 uint64 i;
3165
3166 /* Prevent overflow in call to av_extend() */
3167 if (processed > (uint64) AV_SIZE_MAX)
3168 ereport(ERROR,
3169 (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
3170 errmsg("query result has too many rows to fit in a Perl array")));
3171
3172 rows = newAV();
3173 av_extend(rows, processed);
3174 for (i = 0; i < processed; i++)
3175 {
3176 row = plperl_hash_from_tuple(tuptable->vals[i], tuptable->tupdesc);
3177 av_push(rows, row);
3178 }
3179 hv_store_string(result, "rows",
3180 newRV_noinc((SV *) rows));
3181 }
3182
3183 SPI_freetuptable(tuptable);
3184
3185 return result;
3186 }
3187
3188
3189 /*
3190 * plperl_return_next catches any error and converts it to a Perl error.
3191 * We assume (perhaps without adequate justification) that we need not abort
3192 * the current transaction if the Perl code traps the error.
3193 */
3194 void
plperl_return_next(SV * sv)3195 plperl_return_next(SV *sv)
3196 {
3197 MemoryContext oldcontext = CurrentMemoryContext;
3198
3199 PG_TRY();
3200 {
3201 plperl_return_next_internal(sv);
3202 }
3203 PG_CATCH();
3204 {
3205 ErrorData *edata;
3206
3207 /* Must reset elog.c's state */
3208 MemoryContextSwitchTo(oldcontext);
3209 edata = CopyErrorData();
3210 FlushErrorState();
3211
3212 /* Punt the error to Perl */
3213 croak_cstr(edata->message);
3214 }
3215 PG_END_TRY();
3216 }
3217
3218 /*
3219 * plperl_return_next_internal reports any errors in Postgres fashion
3220 * (via ereport).
3221 */
3222 static void
plperl_return_next_internal(SV * sv)3223 plperl_return_next_internal(SV *sv)
3224 {
3225 plperl_proc_desc *prodesc;
3226 FunctionCallInfo fcinfo;
3227 ReturnSetInfo *rsi;
3228 MemoryContext old_cxt;
3229
3230 if (!sv)
3231 return;
3232
3233 prodesc = current_call_data->prodesc;
3234 fcinfo = current_call_data->fcinfo;
3235 rsi = (ReturnSetInfo *) fcinfo->resultinfo;
3236
3237 if (!prodesc->fn_retisset)
3238 ereport(ERROR,
3239 (errcode(ERRCODE_SYNTAX_ERROR),
3240 errmsg("cannot use return_next in a non-SETOF function")));
3241
3242 if (!current_call_data->ret_tdesc)
3243 {
3244 TupleDesc tupdesc;
3245
3246 Assert(!current_call_data->tuple_store);
3247
3248 /*
3249 * This is the first call to return_next in the current PL/Perl
3250 * function call, so identify the output tuple descriptor and create a
3251 * tuplestore to hold the result rows.
3252 */
3253 if (prodesc->fn_retistuple)
3254 (void) get_call_result_type(fcinfo, NULL, &tupdesc);
3255 else
3256 {
3257 tupdesc = rsi->expectedDesc;
3258 /* Protect assumption below that we return exactly one column */
3259 if (tupdesc == NULL || tupdesc->natts != 1)
3260 elog(ERROR, "expected single-column result descriptor for non-composite SETOF result");
3261 }
3262
3263 /*
3264 * Make sure the tuple_store and ret_tdesc are sufficiently
3265 * long-lived.
3266 */
3267 old_cxt = MemoryContextSwitchTo(rsi->econtext->ecxt_per_query_memory);
3268
3269 current_call_data->ret_tdesc = CreateTupleDescCopy(tupdesc);
3270 current_call_data->tuple_store =
3271 tuplestore_begin_heap(rsi->allowedModes & SFRM_Materialize_Random,
3272 false, work_mem);
3273
3274 MemoryContextSwitchTo(old_cxt);
3275 }
3276
3277 /*
3278 * Producing the tuple we want to return requires making plenty of
3279 * palloc() allocations that are not cleaned up. Since this function can
3280 * be called many times before the current memory context is reset, we
3281 * need to do those allocations in a temporary context.
3282 */
3283 if (!current_call_data->tmp_cxt)
3284 {
3285 current_call_data->tmp_cxt =
3286 AllocSetContextCreate(CurrentMemoryContext,
3287 "PL/Perl return_next temporary cxt",
3288 ALLOCSET_DEFAULT_SIZES);
3289 }
3290
3291 old_cxt = MemoryContextSwitchTo(current_call_data->tmp_cxt);
3292
3293 if (prodesc->fn_retistuple)
3294 {
3295 HeapTuple tuple;
3296
3297 if (!(SvOK(sv) && SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVHV))
3298 ereport(ERROR,
3299 (errcode(ERRCODE_DATATYPE_MISMATCH),
3300 errmsg("SETOF-composite-returning PL/Perl function "
3301 "must call return_next with reference to hash")));
3302
3303 tuple = plperl_build_tuple_result((HV *) SvRV(sv),
3304 current_call_data->ret_tdesc);
3305 tuplestore_puttuple(current_call_data->tuple_store, tuple);
3306 }
3307 else
3308 {
3309 Datum ret[1];
3310 bool isNull[1];
3311
3312 ret[0] = plperl_sv_to_datum(sv,
3313 prodesc->result_oid,
3314 -1,
3315 fcinfo,
3316 &prodesc->result_in_func,
3317 prodesc->result_typioparam,
3318 &isNull[0]);
3319
3320 tuplestore_putvalues(current_call_data->tuple_store,
3321 current_call_data->ret_tdesc,
3322 ret, isNull);
3323 }
3324
3325 MemoryContextSwitchTo(old_cxt);
3326 MemoryContextReset(current_call_data->tmp_cxt);
3327 }
3328
3329
3330 SV *
plperl_spi_query(char * query)3331 plperl_spi_query(char *query)
3332 {
3333 SV *cursor;
3334
3335 /*
3336 * Execute the query inside a sub-transaction, so we can cope with errors
3337 * sanely
3338 */
3339 MemoryContext oldcontext = CurrentMemoryContext;
3340 ResourceOwner oldowner = CurrentResourceOwner;
3341
3342 check_spi_usage_allowed();
3343
3344 BeginInternalSubTransaction(NULL);
3345 /* Want to run inside function's memory context */
3346 MemoryContextSwitchTo(oldcontext);
3347
3348 PG_TRY();
3349 {
3350 SPIPlanPtr plan;
3351 Portal portal;
3352
3353 /* Make sure the query is validly encoded */
3354 pg_verifymbstr(query, strlen(query), false);
3355
3356 /* Create a cursor for the query */
3357 plan = SPI_prepare(query, 0, NULL);
3358 if (plan == NULL)
3359 elog(ERROR, "SPI_prepare() failed:%s",
3360 SPI_result_code_string(SPI_result));
3361
3362 portal = SPI_cursor_open(NULL, plan, NULL, NULL, false);
3363 SPI_freeplan(plan);
3364 if (portal == NULL)
3365 elog(ERROR, "SPI_cursor_open() failed:%s",
3366 SPI_result_code_string(SPI_result));
3367 cursor = cstr2sv(portal->name);
3368
3369 /* Commit the inner transaction, return to outer xact context */
3370 ReleaseCurrentSubTransaction();
3371 MemoryContextSwitchTo(oldcontext);
3372 CurrentResourceOwner = oldowner;
3373 }
3374 PG_CATCH();
3375 {
3376 ErrorData *edata;
3377
3378 /* Save error info */
3379 MemoryContextSwitchTo(oldcontext);
3380 edata = CopyErrorData();
3381 FlushErrorState();
3382
3383 /* Abort the inner transaction */
3384 RollbackAndReleaseCurrentSubTransaction();
3385 MemoryContextSwitchTo(oldcontext);
3386 CurrentResourceOwner = oldowner;
3387
3388 /* Punt the error to Perl */
3389 croak_cstr(edata->message);
3390
3391 /* Can't get here, but keep compiler quiet */
3392 return NULL;
3393 }
3394 PG_END_TRY();
3395
3396 return cursor;
3397 }
3398
3399
3400 SV *
plperl_spi_fetchrow(char * cursor)3401 plperl_spi_fetchrow(char *cursor)
3402 {
3403 SV *row;
3404
3405 /*
3406 * Execute the FETCH inside a sub-transaction, so we can cope with errors
3407 * sanely
3408 */
3409 MemoryContext oldcontext = CurrentMemoryContext;
3410 ResourceOwner oldowner = CurrentResourceOwner;
3411
3412 check_spi_usage_allowed();
3413
3414 BeginInternalSubTransaction(NULL);
3415 /* Want to run inside function's memory context */
3416 MemoryContextSwitchTo(oldcontext);
3417
3418 PG_TRY();
3419 {
3420 dTHX;
3421 Portal p = SPI_cursor_find(cursor);
3422
3423 if (!p)
3424 {
3425 row = &PL_sv_undef;
3426 }
3427 else
3428 {
3429 SPI_cursor_fetch(p, true, 1);
3430 if (SPI_processed == 0)
3431 {
3432 SPI_cursor_close(p);
3433 row = &PL_sv_undef;
3434 }
3435 else
3436 {
3437 row = plperl_hash_from_tuple(SPI_tuptable->vals[0],
3438 SPI_tuptable->tupdesc);
3439 }
3440 SPI_freetuptable(SPI_tuptable);
3441 }
3442
3443 /* Commit the inner transaction, return to outer xact context */
3444 ReleaseCurrentSubTransaction();
3445 MemoryContextSwitchTo(oldcontext);
3446 CurrentResourceOwner = oldowner;
3447 }
3448 PG_CATCH();
3449 {
3450 ErrorData *edata;
3451
3452 /* Save error info */
3453 MemoryContextSwitchTo(oldcontext);
3454 edata = CopyErrorData();
3455 FlushErrorState();
3456
3457 /* Abort the inner transaction */
3458 RollbackAndReleaseCurrentSubTransaction();
3459 MemoryContextSwitchTo(oldcontext);
3460 CurrentResourceOwner = oldowner;
3461
3462 /* Punt the error to Perl */
3463 croak_cstr(edata->message);
3464
3465 /* Can't get here, but keep compiler quiet */
3466 return NULL;
3467 }
3468 PG_END_TRY();
3469
3470 return row;
3471 }
3472
3473 void
plperl_spi_cursor_close(char * cursor)3474 plperl_spi_cursor_close(char *cursor)
3475 {
3476 Portal p;
3477
3478 check_spi_usage_allowed();
3479
3480 p = SPI_cursor_find(cursor);
3481
3482 if (p)
3483 SPI_cursor_close(p);
3484 }
3485
3486 SV *
plperl_spi_prepare(char * query,int argc,SV ** argv)3487 plperl_spi_prepare(char *query, int argc, SV **argv)
3488 {
3489 volatile SPIPlanPtr plan = NULL;
3490 volatile MemoryContext plan_cxt = NULL;
3491 plperl_query_desc *volatile qdesc = NULL;
3492 plperl_query_entry *volatile hash_entry = NULL;
3493 MemoryContext oldcontext = CurrentMemoryContext;
3494 ResourceOwner oldowner = CurrentResourceOwner;
3495 MemoryContext work_cxt;
3496 bool found;
3497 int i;
3498
3499 check_spi_usage_allowed();
3500
3501 BeginInternalSubTransaction(NULL);
3502 MemoryContextSwitchTo(oldcontext);
3503
3504 PG_TRY();
3505 {
3506 CHECK_FOR_INTERRUPTS();
3507
3508 /************************************************************
3509 * Allocate the new querydesc structure
3510 *
3511 * The qdesc struct, as well as all its subsidiary data, lives in its
3512 * plan_cxt. But note that the SPIPlan does not.
3513 ************************************************************/
3514 plan_cxt = AllocSetContextCreate(TopMemoryContext,
3515 "PL/Perl spi_prepare query",
3516 ALLOCSET_SMALL_SIZES);
3517 MemoryContextSwitchTo(plan_cxt);
3518 qdesc = (plperl_query_desc *) palloc0(sizeof(plperl_query_desc));
3519 snprintf(qdesc->qname, sizeof(qdesc->qname), "%p", qdesc);
3520 qdesc->plan_cxt = plan_cxt;
3521 qdesc->nargs = argc;
3522 qdesc->argtypes = (Oid *) palloc(argc * sizeof(Oid));
3523 qdesc->arginfuncs = (FmgrInfo *) palloc(argc * sizeof(FmgrInfo));
3524 qdesc->argtypioparams = (Oid *) palloc(argc * sizeof(Oid));
3525 MemoryContextSwitchTo(oldcontext);
3526
3527 /************************************************************
3528 * Do the following work in a short-lived context so that we don't
3529 * leak a lot of memory in the PL/Perl function's SPI Proc context.
3530 ************************************************************/
3531 work_cxt = AllocSetContextCreate(CurrentMemoryContext,
3532 "PL/Perl spi_prepare workspace",
3533 ALLOCSET_DEFAULT_SIZES);
3534 MemoryContextSwitchTo(work_cxt);
3535
3536 /************************************************************
3537 * Resolve argument type names and then look them up by oid
3538 * in the system cache, and remember the required information
3539 * for input conversion.
3540 ************************************************************/
3541 for (i = 0; i < argc; i++)
3542 {
3543 Oid typId,
3544 typInput,
3545 typIOParam;
3546 int32 typmod;
3547 char *typstr;
3548
3549 typstr = sv2cstr(argv[i]);
3550 parseTypeString(typstr, &typId, &typmod, false);
3551 pfree(typstr);
3552
3553 getTypeInputInfo(typId, &typInput, &typIOParam);
3554
3555 qdesc->argtypes[i] = typId;
3556 fmgr_info_cxt(typInput, &(qdesc->arginfuncs[i]), plan_cxt);
3557 qdesc->argtypioparams[i] = typIOParam;
3558 }
3559
3560 /* Make sure the query is validly encoded */
3561 pg_verifymbstr(query, strlen(query), false);
3562
3563 /************************************************************
3564 * Prepare the plan and check for errors
3565 ************************************************************/
3566 plan = SPI_prepare(query, argc, qdesc->argtypes);
3567
3568 if (plan == NULL)
3569 elog(ERROR, "SPI_prepare() failed:%s",
3570 SPI_result_code_string(SPI_result));
3571
3572 /************************************************************
3573 * Save the plan into permanent memory (right now it's in the
3574 * SPI procCxt, which will go away at function end).
3575 ************************************************************/
3576 if (SPI_keepplan(plan))
3577 elog(ERROR, "SPI_keepplan() failed");
3578 qdesc->plan = plan;
3579
3580 /************************************************************
3581 * Insert a hashtable entry for the plan.
3582 ************************************************************/
3583 hash_entry = hash_search(plperl_active_interp->query_hash,
3584 qdesc->qname,
3585 HASH_ENTER, &found);
3586 hash_entry->query_data = qdesc;
3587
3588 /* Get rid of workspace */
3589 MemoryContextDelete(work_cxt);
3590
3591 /* Commit the inner transaction, return to outer xact context */
3592 ReleaseCurrentSubTransaction();
3593 MemoryContextSwitchTo(oldcontext);
3594 CurrentResourceOwner = oldowner;
3595 }
3596 PG_CATCH();
3597 {
3598 ErrorData *edata;
3599
3600 /* Save error info */
3601 MemoryContextSwitchTo(oldcontext);
3602 edata = CopyErrorData();
3603 FlushErrorState();
3604
3605 /* Drop anything we managed to allocate */
3606 if (hash_entry)
3607 hash_search(plperl_active_interp->query_hash,
3608 qdesc->qname,
3609 HASH_REMOVE, NULL);
3610 if (plan_cxt)
3611 MemoryContextDelete(plan_cxt);
3612 if (plan)
3613 SPI_freeplan(plan);
3614
3615 /* Abort the inner transaction */
3616 RollbackAndReleaseCurrentSubTransaction();
3617 MemoryContextSwitchTo(oldcontext);
3618 CurrentResourceOwner = oldowner;
3619
3620 /* Punt the error to Perl */
3621 croak_cstr(edata->message);
3622
3623 /* Can't get here, but keep compiler quiet */
3624 return NULL;
3625 }
3626 PG_END_TRY();
3627
3628 /************************************************************
3629 * Return the query's hash key to the caller.
3630 ************************************************************/
3631 return cstr2sv(qdesc->qname);
3632 }
3633
3634 HV *
plperl_spi_exec_prepared(char * query,HV * attr,int argc,SV ** argv)3635 plperl_spi_exec_prepared(char *query, HV *attr, int argc, SV **argv)
3636 {
3637 HV *ret_hv;
3638 SV **sv;
3639 int i,
3640 limit,
3641 spi_rv;
3642 char *nulls;
3643 Datum *argvalues;
3644 plperl_query_desc *qdesc;
3645 plperl_query_entry *hash_entry;
3646
3647 /*
3648 * Execute the query inside a sub-transaction, so we can cope with errors
3649 * sanely
3650 */
3651 MemoryContext oldcontext = CurrentMemoryContext;
3652 ResourceOwner oldowner = CurrentResourceOwner;
3653
3654 check_spi_usage_allowed();
3655
3656 BeginInternalSubTransaction(NULL);
3657 /* Want to run inside function's memory context */
3658 MemoryContextSwitchTo(oldcontext);
3659
3660 PG_TRY();
3661 {
3662 dTHX;
3663
3664 /************************************************************
3665 * Fetch the saved plan descriptor, see if it's o.k.
3666 ************************************************************/
3667 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3668 HASH_FIND, NULL);
3669 if (hash_entry == NULL)
3670 elog(ERROR, "spi_exec_prepared: Invalid prepared query passed");
3671
3672 qdesc = hash_entry->query_data;
3673 if (qdesc == NULL)
3674 elog(ERROR, "spi_exec_prepared: plperl query_hash value vanished");
3675
3676 if (qdesc->nargs != argc)
3677 elog(ERROR, "spi_exec_prepared: expected %d argument(s), %d passed",
3678 qdesc->nargs, argc);
3679
3680 /************************************************************
3681 * Parse eventual attributes
3682 ************************************************************/
3683 limit = 0;
3684 if (attr != NULL)
3685 {
3686 sv = hv_fetch_string(attr, "limit");
3687 if (sv && *sv && SvIOK(*sv))
3688 limit = SvIV(*sv);
3689 }
3690 /************************************************************
3691 * Set up arguments
3692 ************************************************************/
3693 if (argc > 0)
3694 {
3695 nulls = (char *) palloc(argc);
3696 argvalues = (Datum *) palloc(argc * sizeof(Datum));
3697 }
3698 else
3699 {
3700 nulls = NULL;
3701 argvalues = NULL;
3702 }
3703
3704 for (i = 0; i < argc; i++)
3705 {
3706 bool isnull;
3707
3708 argvalues[i] = plperl_sv_to_datum(argv[i],
3709 qdesc->argtypes[i],
3710 -1,
3711 NULL,
3712 &qdesc->arginfuncs[i],
3713 qdesc->argtypioparams[i],
3714 &isnull);
3715 nulls[i] = isnull ? 'n' : ' ';
3716 }
3717
3718 /************************************************************
3719 * go
3720 ************************************************************/
3721 spi_rv = SPI_execute_plan(qdesc->plan, argvalues, nulls,
3722 current_call_data->prodesc->fn_readonly, limit);
3723 ret_hv = plperl_spi_execute_fetch_result(SPI_tuptable, SPI_processed,
3724 spi_rv);
3725 if (argc > 0)
3726 {
3727 pfree(argvalues);
3728 pfree(nulls);
3729 }
3730
3731 /* Commit the inner transaction, return to outer xact context */
3732 ReleaseCurrentSubTransaction();
3733 MemoryContextSwitchTo(oldcontext);
3734 CurrentResourceOwner = oldowner;
3735 }
3736 PG_CATCH();
3737 {
3738 ErrorData *edata;
3739
3740 /* Save error info */
3741 MemoryContextSwitchTo(oldcontext);
3742 edata = CopyErrorData();
3743 FlushErrorState();
3744
3745 /* Abort the inner transaction */
3746 RollbackAndReleaseCurrentSubTransaction();
3747 MemoryContextSwitchTo(oldcontext);
3748 CurrentResourceOwner = oldowner;
3749
3750 /* Punt the error to Perl */
3751 croak_cstr(edata->message);
3752
3753 /* Can't get here, but keep compiler quiet */
3754 return NULL;
3755 }
3756 PG_END_TRY();
3757
3758 return ret_hv;
3759 }
3760
3761 SV *
plperl_spi_query_prepared(char * query,int argc,SV ** argv)3762 plperl_spi_query_prepared(char *query, int argc, SV **argv)
3763 {
3764 int i;
3765 char *nulls;
3766 Datum *argvalues;
3767 plperl_query_desc *qdesc;
3768 plperl_query_entry *hash_entry;
3769 SV *cursor;
3770 Portal portal = NULL;
3771
3772 /*
3773 * Execute the query inside a sub-transaction, so we can cope with errors
3774 * sanely
3775 */
3776 MemoryContext oldcontext = CurrentMemoryContext;
3777 ResourceOwner oldowner = CurrentResourceOwner;
3778
3779 check_spi_usage_allowed();
3780
3781 BeginInternalSubTransaction(NULL);
3782 /* Want to run inside function's memory context */
3783 MemoryContextSwitchTo(oldcontext);
3784
3785 PG_TRY();
3786 {
3787 /************************************************************
3788 * Fetch the saved plan descriptor, see if it's o.k.
3789 ************************************************************/
3790 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3791 HASH_FIND, NULL);
3792 if (hash_entry == NULL)
3793 elog(ERROR, "spi_query_prepared: Invalid prepared query passed");
3794
3795 qdesc = hash_entry->query_data;
3796 if (qdesc == NULL)
3797 elog(ERROR, "spi_query_prepared: plperl query_hash value vanished");
3798
3799 if (qdesc->nargs != argc)
3800 elog(ERROR, "spi_query_prepared: expected %d argument(s), %d passed",
3801 qdesc->nargs, argc);
3802
3803 /************************************************************
3804 * Set up arguments
3805 ************************************************************/
3806 if (argc > 0)
3807 {
3808 nulls = (char *) palloc(argc);
3809 argvalues = (Datum *) palloc(argc * sizeof(Datum));
3810 }
3811 else
3812 {
3813 nulls = NULL;
3814 argvalues = NULL;
3815 }
3816
3817 for (i = 0; i < argc; i++)
3818 {
3819 bool isnull;
3820
3821 argvalues[i] = plperl_sv_to_datum(argv[i],
3822 qdesc->argtypes[i],
3823 -1,
3824 NULL,
3825 &qdesc->arginfuncs[i],
3826 qdesc->argtypioparams[i],
3827 &isnull);
3828 nulls[i] = isnull ? 'n' : ' ';
3829 }
3830
3831 /************************************************************
3832 * go
3833 ************************************************************/
3834 portal = SPI_cursor_open(NULL, qdesc->plan, argvalues, nulls,
3835 current_call_data->prodesc->fn_readonly);
3836 if (argc > 0)
3837 {
3838 pfree(argvalues);
3839 pfree(nulls);
3840 }
3841 if (portal == NULL)
3842 elog(ERROR, "SPI_cursor_open() failed:%s",
3843 SPI_result_code_string(SPI_result));
3844
3845 cursor = cstr2sv(portal->name);
3846
3847 /* Commit the inner transaction, return to outer xact context */
3848 ReleaseCurrentSubTransaction();
3849 MemoryContextSwitchTo(oldcontext);
3850 CurrentResourceOwner = oldowner;
3851 }
3852 PG_CATCH();
3853 {
3854 ErrorData *edata;
3855
3856 /* Save error info */
3857 MemoryContextSwitchTo(oldcontext);
3858 edata = CopyErrorData();
3859 FlushErrorState();
3860
3861 /* Abort the inner transaction */
3862 RollbackAndReleaseCurrentSubTransaction();
3863 MemoryContextSwitchTo(oldcontext);
3864 CurrentResourceOwner = oldowner;
3865
3866 /* Punt the error to Perl */
3867 croak_cstr(edata->message);
3868
3869 /* Can't get here, but keep compiler quiet */
3870 return NULL;
3871 }
3872 PG_END_TRY();
3873
3874 return cursor;
3875 }
3876
3877 void
plperl_spi_freeplan(char * query)3878 plperl_spi_freeplan(char *query)
3879 {
3880 SPIPlanPtr plan;
3881 plperl_query_desc *qdesc;
3882 plperl_query_entry *hash_entry;
3883
3884 check_spi_usage_allowed();
3885
3886 hash_entry = hash_search(plperl_active_interp->query_hash, query,
3887 HASH_FIND, NULL);
3888 if (hash_entry == NULL)
3889 elog(ERROR, "spi_freeplan: Invalid prepared query passed");
3890
3891 qdesc = hash_entry->query_data;
3892 if (qdesc == NULL)
3893 elog(ERROR, "spi_freeplan: plperl query_hash value vanished");
3894 plan = qdesc->plan;
3895
3896 /*
3897 * free all memory before SPI_freeplan, so if it dies, nothing will be
3898 * left over
3899 */
3900 hash_search(plperl_active_interp->query_hash, query,
3901 HASH_REMOVE, NULL);
3902
3903 MemoryContextDelete(qdesc->plan_cxt);
3904
3905 SPI_freeplan(plan);
3906 }
3907
3908 /*
3909 * Implementation of plperl's elog() function
3910 *
3911 * If the error level is less than ERROR, we'll just emit the message and
3912 * return. When it is ERROR, elog() will longjmp, which we catch and
3913 * turn into a Perl croak(). Note we are assuming that elog() can't have
3914 * any internal failures that are so bad as to require a transaction abort.
3915 *
3916 * The main reason this is out-of-line is to avoid conflicts between XSUB.h
3917 * and the PG_TRY macros.
3918 */
3919 void
plperl_util_elog(int level,SV * msg)3920 plperl_util_elog(int level, SV *msg)
3921 {
3922 MemoryContext oldcontext = CurrentMemoryContext;
3923 char *volatile cmsg = NULL;
3924
3925 PG_TRY();
3926 {
3927 cmsg = sv2cstr(msg);
3928 elog(level, "%s", cmsg);
3929 pfree(cmsg);
3930 }
3931 PG_CATCH();
3932 {
3933 ErrorData *edata;
3934
3935 /* Must reset elog.c's state */
3936 MemoryContextSwitchTo(oldcontext);
3937 edata = CopyErrorData();
3938 FlushErrorState();
3939
3940 if (cmsg)
3941 pfree(cmsg);
3942
3943 /* Punt the error to Perl */
3944 croak_cstr(edata->message);
3945 }
3946 PG_END_TRY();
3947 }
3948
3949 /*
3950 * Store an SV into a hash table under a key that is a string assumed to be
3951 * in the current database's encoding.
3952 */
3953 static SV **
hv_store_string(HV * hv,const char * key,SV * val)3954 hv_store_string(HV *hv, const char *key, SV *val)
3955 {
3956 dTHX;
3957 int32 hlen;
3958 char *hkey;
3959 SV **ret;
3960
3961 hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
3962
3963 /*
3964 * hv_store() recognizes a negative klen parameter as meaning a UTF-8
3965 * encoded key.
3966 */
3967 hlen = -(int) strlen(hkey);
3968 ret = hv_store(hv, hkey, hlen, val, 0);
3969
3970 if (hkey != key)
3971 pfree(hkey);
3972
3973 return ret;
3974 }
3975
3976 /*
3977 * Fetch an SV from a hash table under a key that is a string assumed to be
3978 * in the current database's encoding.
3979 */
3980 static SV **
hv_fetch_string(HV * hv,const char * key)3981 hv_fetch_string(HV *hv, const char *key)
3982 {
3983 dTHX;
3984 int32 hlen;
3985 char *hkey;
3986 SV **ret;
3987
3988 hkey = pg_server_to_any(key, strlen(key), PG_UTF8);
3989
3990 /* See notes in hv_store_string */
3991 hlen = -(int) strlen(hkey);
3992 ret = hv_fetch(hv, hkey, hlen, 0);
3993
3994 if (hkey != key)
3995 pfree(hkey);
3996
3997 return ret;
3998 }
3999
4000 /*
4001 * Provide function name for PL/Perl execution errors
4002 */
4003 static void
plperl_exec_callback(void * arg)4004 plperl_exec_callback(void *arg)
4005 {
4006 char *procname = (char *) arg;
4007
4008 if (procname)
4009 errcontext("PL/Perl function \"%s\"", procname);
4010 }
4011
4012 /*
4013 * Provide function name for PL/Perl compilation errors
4014 */
4015 static void
plperl_compile_callback(void * arg)4016 plperl_compile_callback(void *arg)
4017 {
4018 char *procname = (char *) arg;
4019
4020 if (procname)
4021 errcontext("compilation of PL/Perl function \"%s\"", procname);
4022 }
4023
4024 /*
4025 * Provide error context for the inline handler
4026 */
4027 static void
plperl_inline_callback(void * arg)4028 plperl_inline_callback(void *arg)
4029 {
4030 errcontext("PL/Perl anonymous code block");
4031 }
4032
4033
4034 /*
4035 * Perl's own setlocale(), copied from POSIX.xs
4036 * (needed because of the calls to new_*())
4037 */
4038 #ifdef WIN32
4039 static char *
setlocale_perl(int category,char * locale)4040 setlocale_perl(int category, char *locale)
4041 {
4042 dTHX;
4043 char *RETVAL = setlocale(category, locale);
4044
4045 if (RETVAL)
4046 {
4047 #ifdef USE_LOCALE_CTYPE
4048 if (category == LC_CTYPE
4049 #ifdef LC_ALL
4050 || category == LC_ALL
4051 #endif
4052 )
4053 {
4054 char *newctype;
4055
4056 #ifdef LC_ALL
4057 if (category == LC_ALL)
4058 newctype = setlocale(LC_CTYPE, NULL);
4059 else
4060 #endif
4061 newctype = RETVAL;
4062 new_ctype(newctype);
4063 }
4064 #endif /* USE_LOCALE_CTYPE */
4065 #ifdef USE_LOCALE_COLLATE
4066 if (category == LC_COLLATE
4067 #ifdef LC_ALL
4068 || category == LC_ALL
4069 #endif
4070 )
4071 {
4072 char *newcoll;
4073
4074 #ifdef LC_ALL
4075 if (category == LC_ALL)
4076 newcoll = setlocale(LC_COLLATE, NULL);
4077 else
4078 #endif
4079 newcoll = RETVAL;
4080 new_collate(newcoll);
4081 }
4082 #endif /* USE_LOCALE_COLLATE */
4083
4084 #ifdef USE_LOCALE_NUMERIC
4085 if (category == LC_NUMERIC
4086 #ifdef LC_ALL
4087 || category == LC_ALL
4088 #endif
4089 )
4090 {
4091 char *newnum;
4092
4093 #ifdef LC_ALL
4094 if (category == LC_ALL)
4095 newnum = setlocale(LC_NUMERIC, NULL);
4096 else
4097 #endif
4098 newnum = RETVAL;
4099 new_numeric(newnum);
4100 }
4101 #endif /* USE_LOCALE_NUMERIC */
4102 }
4103
4104 return RETVAL;
4105 }
4106
4107 #endif /* WIN32 */
4108