[perl #24198] Bad default-domainname extraction in Configure-Script may cause infinit...

[perl5.git] / op.h

diff --git a/op.h b/op.h
index 264dd52..e263a9c 100644 (file)
--- a/op.h
+++ b/op.h
@@ -45,6 +45,8 @@
 #  define MADPROP_IN_BASEOP
 #endif
 
+typedef PERL_BITFIELD16 Optype;
+
 #ifdef BASEOP_DEFINITION
 #define BASEOP BASEOP_DEFINITION
 #else
@@ -54,22 +56,29 @@
     OP*                (CPERLscope(*op_ppaddr))(pTHX);         \
     MADPROP_IN_BASEOP                  \
     PADOFFSET  op_targ;                \
-    unsigned   op_type:9;              \
-    unsigned   op_opt:1;               \
-    unsigned   op_latefree:1;          \
-    unsigned   op_latefreed:1;         \
-    unsigned   op_attached:1;          \
-    unsigned   op_spare:3;             \
+    PERL_BITFIELD16 op_type:9;         \
+    PERL_BITFIELD16 op_opt:1;          \
+    PERL_BITFIELD16 op_latefree:1;     \
+    PERL_BITFIELD16 op_latefreed:1;    \
+    PERL_BITFIELD16 op_attached:1;     \
+    PERL_BITFIELD16 op_spare:3;                \
     U8         op_flags;               \
     U8         op_private;
 #endif
 
+/* If op_type:9 is changed to :10, also change PUSHEVAL in cop.h.
+   Also, if the type of op_type is ever changed (e.g. to PERL_BITFIELD32)
+   then all the other bit-fields before/after it should change their
+   types too to let VC pack them into the same 4 byte integer.*/
+
 #define OP_GIMME(op,dfl) \
        (((op)->op_flags & OPf_WANT) == OPf_WANT_VOID   ? G_VOID   : \
         ((op)->op_flags & OPf_WANT) == OPf_WANT_SCALAR ? G_SCALAR : \
         ((op)->op_flags & OPf_WANT) == OPf_WANT_LIST   ? G_ARRAY   : \
         dfl)
 
+#define OP_GIMME_REVERSE(flags)        ((flags) & G_WANT)
+
 /*
 =head1 "Gimme" Values
 
@@ -103,8 +112,6 @@ Deprecated.  Use C<GIMME_V> instead.
 #define OPf_STACKED    64      /* Some arg is arriving on the stack. */
 #define OPf_SPECIAL    128     /* Do something weird for this op: */
                                /*  On local LVAL, don't init local value. */
-                               /*  On OP_CONST, value is the hints hash for
-                                   eval, so return a copy from pp_const() */
                                /*  On OP_SORT, subroutine is inlined. */
                                /*  On OP_NOT, inversion was implicit. */
                                /*  On OP_LEAVE, don't restore curpm. */
@@ -184,7 +191,7 @@ Deprecated.  Use C<GIMME_V> instead.
 #define OPpENTERSUB_DB         16      /* Debug subroutine. */
 #define OPpENTERSUB_HASTARG    32      /* Called from OP tree. */
 #define OPpENTERSUB_NOMOD      64      /* Immune to mod() for :attrlist. */
-  /* OP_RV2CV only */
+  /* OP_ENTERSUB and OP_RV2CV only */
 #define OPpENTERSUB_AMPER      8       /* Used & form to call. */
 #define OPpENTERSUB_NOPAREN    128     /* bare sub call (without parens) */
 #define OPpENTERSUB_INARGS     4       /* Lval used as arg to a sub. */
@@ -259,13 +266,6 @@ Deprecated.  Use C<GIMME_V> instead.
 /* Private for OP_FTXXX */
 #define OPpFT_ACCESS           2       /* use filetest 'access' */
 #define OPpFT_STACKED          4       /* stacked filetest, as in "-f -x $f" */
-#define OP_IS_FILETEST_ACCESS(op)              \
-       (((op)->op_type) == OP_FTRREAD  ||      \
-        ((op)->op_type) == OP_FTRWRITE ||      \
-        ((op)->op_type) == OP_FTREXEC  ||      \
-        ((op)->op_type) == OP_FTEREAD  ||      \
-        ((op)->op_type) == OP_FTEWRITE ||      \
-        ((op)->op_type) == OP_FTEEXEC)
 
 /* Private for OP_(MAP|GREP)(WHILE|START) */
 #define OPpGREP_LEX            2       /* iterate over lexical $_ */
@@ -329,23 +329,24 @@ struct pmop {
 };
 
 #ifdef USE_ITHREADS
-#define PM_GETRE(o)     (INT2PTR(REGEXP*,SvIVX(PL_regex_pad[(o)->op_pmoffset])))
-#define PM_SETRE(o,r)   STMT_START { \
-                            SV* const sv = PL_regex_pad[(o)->op_pmoffset]; \
-                            sv_setiv(sv, PTR2IV(r)); \
+#define PM_GETRE(o)    (SvTYPE(PL_regex_pad[(o)->op_pmoffset]) == SVt_REGEXP \
+                        ? (REGEXP*)(PL_regex_pad[(o)->op_pmoffset]) : NULL)
+/* The assignment is just to enforce type safety (or at least get a warning).
+ */
+/* With first class regexps not via a reference one needs to assign
+   &PL_sv_undef under ithreads. (This would probably work unthreaded, but NULL
+   is cheaper. I guess we could allow NULL, but the check above would get
+   more complex, and we'd have an AV with (SV*)NULL in it, which feels bad */
+/* BEWARE - something that calls this macro passes (r) which has a side
+   effect.  */
+#define PM_SETRE(o,r)  STMT_START {                                    \
+                            const REGEXP *const _pm_setre = (r);       \
+                            assert(_pm_setre);                         \
+                           PL_regex_pad[(o)->op_pmoffset] = (SV*)_pm_setre; \
                         } STMT_END
-#  ifndef PERL_CORE
-/* No longer used anywhere in the core.  Migrate to Devel::PPPort?  */
-#define PM_GETRE_SAFE(o) (PL_regex_pad ? PM_GETRE(o) : (REGEXP*)0)
-#define PM_SETRE_SAFE(o,r) if (PL_regex_pad) PM_SETRE(o,r)
-#  endif
 #else
 #define PM_GETRE(o)     ((o)->op_pmregexp)
 #define PM_SETRE(o,r)   ((o)->op_pmregexp = (r))
-#  ifndef PERL_CORE
-#define PM_GETRE_SAFE PM_GETRE
-#define PM_SETRE_SAFE PM_SETRE
-#  endif
 #endif
 
 
@@ -512,7 +513,9 @@ struct loop {
 #define cSVOPo_sv              cSVOPx_sv(o)
 #define kSVOP_sv               cSVOPx_sv(kid)
 
-#define Nullop ((OP*)NULL)
+#ifndef PERL_CORE
+#  define Nullop ((OP*)NULL)
+#endif
 
 /* Lowest byte-and-a-bit of PL_opargs */
 #define OA_MARK 1