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perl/perl-5.10.0-much-better-swap-logic.patch
Marcela Mašláňová 4e44f068c3 - 494773 much better swap logic to support reentrancy and fix assert 
failure (rt #60508)
2009-07-27 07:11:48 +00:00

203 lines
7.8 KiB
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diff -up perl-5.10.0/embed.fnc.much perl-5.10.0/embed.fnc
--- perl-5.10.0/embed.fnc.much 2009-07-27 08:31:33.839374246 +0200
+++ perl-5.10.0/embed.fnc 2009-07-27 08:32:05.322374620 +0200
@@ -1441,7 +1441,6 @@ ERsn |U8* |reghop4 |NN U8 *pos|I32 off|N
#endif
ERsn |U8* |reghopmaybe3 |NN U8 *pos|I32 off|NN const U8 *lim
ERs |char* |find_byclass |NN regexp * prog|NN const regnode *c|NN char *s|NN const char *strend|NULLOK regmatch_info *reginfo
-Es |void |swap_match_buff|NN regexp * prog
Es |void |to_utf8_substr |NN regexp * prog
Es |void |to_byte_substr |NN regexp * prog
ERs |I32 |reg_check_named_buff_matched |NN const regexp *rex|NN const regnode *prog
diff -up perl-5.10.0/embed.h.much perl-5.10.0/embed.h
--- perl-5.10.0/embed.h.much 2007-12-18 11:47:07.000000000 +0100
+++ perl-5.10.0/embed.h 2009-07-27 08:31:34.016378805 +0200
@@ -1426,7 +1426,6 @@
#if defined(PERL_CORE) || defined(PERL_EXT)
#define reghopmaybe3 S_reghopmaybe3
#define find_byclass S_find_byclass
-#define swap_match_buff S_swap_match_buff
#define to_utf8_substr S_to_utf8_substr
#define to_byte_substr S_to_byte_substr
#define reg_check_named_buff_matched S_reg_check_named_buff_matched
@@ -3714,7 +3713,6 @@
#if defined(PERL_CORE) || defined(PERL_EXT)
#define reghopmaybe3 S_reghopmaybe3
#define find_byclass(a,b,c,d,e) S_find_byclass(aTHX_ a,b,c,d,e)
-#define swap_match_buff(a) S_swap_match_buff(aTHX_ a)
#define to_utf8_substr(a) S_to_utf8_substr(aTHX_ a)
#define to_byte_substr(a) S_to_byte_substr(aTHX_ a)
#define reg_check_named_buff_matched(a,b) S_reg_check_named_buff_matched(aTHX_ a,b)
diff -up perl-5.10.0/ext/Devel/PPPort/parts/embed.fnc.much perl-5.10.0/ext/Devel/PPPort/parts/embed.fnc
--- perl-5.10.0/ext/Devel/PPPort/parts/embed.fnc.much 2007-12-18 11:47:07.000000000 +0100
+++ perl-5.10.0/ext/Devel/PPPort/parts/embed.fnc 2009-07-27 08:32:58.859374528 +0200
@@ -1436,7 +1436,6 @@ ERsn |U8* |reghop4 |NN U8 *pos|I32 off|N
#endif
ERsn |U8* |reghopmaybe3 |NN U8 *pos|I32 off|NN const U8 *lim
ERs |char* |find_byclass |NN regexp * prog|NN const regnode *c|NN char *s|NN const char *strend|NULLOK regmatch_info *reginfo
-Es |void |swap_match_buff|NN regexp * prog
Es |void |to_utf8_substr |NN regexp * prog
Es |void |to_byte_substr |NN regexp * prog
ERs |I32 |reg_check_named_buff_matched |NN const regexp *rex|NN const regnode *prog
diff -up perl-5.10.0/pod/perlapi.pod.much perl-5.10.0/pod/perlapi.pod
diff -up perl-5.10.0/pod/perlguts.pod.much perl-5.10.0/pod/perlguts.pod
diff -up perl-5.10.0/proto.h.much perl-5.10.0/proto.h
--- perl-5.10.0/proto.h.much 2009-07-27 08:31:33.000000000 +0200
+++ perl-5.10.0/proto.h 2009-07-27 08:35:52.103374484 +0200
@@ -3851,9 +3851,6 @@ STATIC char* S_find_byclass(pTHX_ regexp
__attribute__nonnull__(pTHX_3)
__attribute__nonnull__(pTHX_4);
-STATIC void S_swap_match_buff(pTHX_ regexp * prog)
- __attribute__nonnull__(pTHX_1);
-
STATIC void S_to_utf8_substr(pTHX_ regexp * prog)
__attribute__nonnull__(pTHX_1);
diff -up perl-5.10.0/regcomp.c.much perl-5.10.0/regcomp.c
--- perl-5.10.0/regcomp.c.much 2009-07-27 08:31:33.000000000 +0200
+++ perl-5.10.0/regcomp.c 2009-07-27 08:37:09.598625044 +0200
@@ -9167,7 +9167,6 @@ Perl_pregfree(pTHX_ struct regexp *r)
if (r->saved_copy)
SvREFCNT_dec(r->saved_copy);
#endif
- Safefree(r->swap);
Safefree(r->offs);
Safefree(r);
}
@@ -9216,7 +9215,6 @@ Perl_reg_temp_copy (pTHX_ struct regexp
ret->saved_copy = NULL;
#endif
ret->mother_re = r;
- ret->swap = NULL;
return ret;
}
diff -up perl-5.10.0/regexec.c.much perl-5.10.0/regexec.c
--- perl-5.10.0/regexec.c.much 2007-12-18 11:47:08.000000000 +0100
+++ perl-5.10.0/regexec.c 2009-07-27 08:40:15.966404877 +0200
@@ -1718,26 +1718,6 @@ S_find_byclass(pTHX_ regexp * prog, cons
return s;
}
-static void
-S_swap_match_buff (pTHX_ regexp *prog) {
- regexp_paren_pair *t;
-
- if (!prog->swap) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent paritally
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- Newxz(prog->swap, (prog->nparens + 1), regexp_paren_pair);
- }
- t = prog->swap;
- prog->swap = prog->offs;
- prog->offs = t;
-}
-
-
/*
- regexec_flags - match a regexp against a string
*/
@@ -1765,7 +1745,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const
I32 multiline;
RXi_GET_DECL(prog,progi);
regmatch_info reginfo; /* create some info to pass to regtry etc */
- bool swap_on_fail = 0;
+ regexp_paren_pair *swap = NULL;
GET_RE_DEBUG_FLAGS_DECL;
@@ -1843,9 +1823,16 @@ Perl_regexec_flags(pTHX_ REGEXP * const
reginfo.ganch = strbeg;
}
if (PL_curpm && (PM_GETRE(PL_curpm) == prog)) {
- swap_on_fail = 1;
- swap_match_buff(prog); /* do we need a save destructor here for
- eval dies? */
+ /* We have to be careful. If the previous successful match
+ was from this regex we don't want a subsequent partially
+ successful match to clobber the old results.
+ So when we detect this possibility we add a swap buffer
+ to the re, and switch the buffer each match. If we fail
+ we switch it back, otherwise we leave it swapped.
+ */
+ swap = prog->offs;
+ /* do we need a save destructor here for eval dies? */
+ Newxz(prog->offs, (prog->nparens + 1), regexp_paren_pair);
}
if (!(flags & REXEC_CHECKED) && (prog->check_substr != NULL || prog->check_utf8 != NULL)) {
re_scream_pos_data d;
@@ -2144,6 +2131,7 @@ Perl_regexec_flags(pTHX_ REGEXP * const
goto phooey;
got_it:
+ Safefree(swap);
RX_MATCH_TAINTED_set(prog, PL_reg_flags & RF_tainted);
if (PL_reg_eval_set)
@@ -2189,10 +2177,12 @@ phooey:
PL_colors[4], PL_colors[5]));
if (PL_reg_eval_set)
restore_pos(aTHX_ prog);
- if (swap_on_fail)
+ if (swap) {
/* we failed :-( roll it back */
- swap_match_buff(prog);
-
+ Safefree(prog->offs);
+ prog->offs = swap;
+ }
+
return 0;
}
diff -up perl-5.10.0/regexp.h.much perl-5.10.0/regexp.h
--- perl-5.10.0/regexp.h.much 2007-12-18 11:47:08.000000000 +0100
+++ perl-5.10.0/regexp.h 2009-07-27 08:41:06.882374786 +0200
@@ -88,7 +88,7 @@ typedef struct regexp {
/* Data about the last/current match. These are modified during matching*/
U32 lastparen; /* last open paren matched */
U32 lastcloseparen; /* last close paren matched */
- regexp_paren_pair *swap; /* Swap copy of *offs */
+ regexp_paren_pair *swap; /* Unused: 5.10.1 and later */
regexp_paren_pair *offs; /* Array of offsets for (@-) and (@+) */
char *subbeg; /* saved or original string
diff -up perl-5.10.0/t/op/pat.t.much perl-5.10.0/t/op/pat.t
--- perl-5.10.0/t/op/pat.t.much 2007-12-18 11:47:08.000000000 +0100
+++ perl-5.10.0/t/op/pat.t 2009-07-27 08:44:50.343375513 +0200
@@ -4558,10 +4558,27 @@ ok($@=~/\QSequence \k... not terminated
ok("aaa" =~ /$s/, "#45337");
}
+# This only works under -DEBUGGING because it relies on an assert().
+{
+ local $BugId = '60508';
+ local $Message = "Check capture offset re-entrancy of utf8 code.";
+
+ sub fswash { $_[0] =~ s/([>X])//g; }
+ my $k1 = "." x 4 . ">>";
+ fswash($k1);
+
+ my $k2 = "\x{f1}\x{2022}";
+ $k2 =~ s/([\360-\362])/>/g;
+ fswash($k2);
+
+ iseq($k2, "\x{2022}", "utf8::SWASHNEW doesn't cause capture leaks");
+}
+
# Put new tests above the dotted line about a page above this comment
iseq(0+$::test,$::TestCount,"Got the right number of tests!");
# Don't forget to update this!
BEGIN {
- $::TestCount = 4013;
+ $::TestCount = 4014;
print "1..$::TestCount\n";
}
+
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