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op.h
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/* op.h
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
* 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* The fields of BASEOP are:
* op_next Pointer to next ppcode to execute after this one.
* (Top level pre-grafted op points to first op,
* but this is replaced when op is grafted in, when
* this op will point to the real next op, and the new
* parent takes over role of remembering starting op.)
* op_sibparent Pointer to the op's next sibling, or to the parent
* if there are no more siblings.
* op_ppaddr Pointer to current ppcode's function.
* op_targ An index into the current pad, identifying an SV
* that is typically used to store the OP's result
* (such as a lexical variable, or a SVs_PADTMP
* temporary intermediate value).
* op_type The type of the operation.
* op_opt Whether or not the op has been optimised by the
* peephole optimiser.
* op_slabbed allocated via opslab
* op_static tell op_free() to skip PerlMemShared_free(), when
* !op_slabbed.
* op_savefree on savestack via SAVEFREEOP
* op_folded Result/remainder of a constant fold operation.
* op_moresib this op is not the last sibling
* op_spare One spare bit
* op_flags Flags common to all operations. See OPf_* below.
* op_private Flags peculiar to a particular operation (BUT,
* by default, set to the number of children until
* the operation is privatized by a check routine,
* which may or may not check number of children).
*/
#include "op_reg_common.h"
#define OPCODE U16
typedef PERL_BITFIELD16 Optype;
#ifdef BASEOP_DEFINITION
#define BASEOP BASEOP_DEFINITION
#else
#define BASEOP \
OP* op_next; \
OP* op_sibparent; \
OP* (*op_ppaddr)(pTHX); \
PADOFFSET op_targ; \
PERL_BITFIELD16 op_type:9; \
PERL_BITFIELD16 op_opt:1; \
PERL_BITFIELD16 op_slabbed:1; \
PERL_BITFIELD16 op_savefree:1; \
PERL_BITFIELD16 op_static:1; \
PERL_BITFIELD16 op_folded:1; \
PERL_BITFIELD16 op_moresib:1; \
PERL_BITFIELD16 op_spare:1; \
U8 op_flags; \
U8 op_private;
#endif
#define OpTYPE_set(o,type) \
STMT_START { \
OP *o_ = (OP *)o; \
OPCODE type_ = type; \
o_->op_type = type_; \
o_->op_ppaddr = PL_ppaddr[type_]; \
} STMT_END
/* If op_type:9 is changed to :10, also change cx_pusheval()
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.*/
/* for efficiency, requires OPf_WANT_VOID == G_VOID etc */
#define OP_GIMME(op,dfl) \
(((op)->op_flags & OPf_WANT) ? ((op)->op_flags & OPf_WANT) : dfl)
#define OP_GIMME_REVERSE(flags) ((flags) & G_WANT)
/*
=for apidoc_section $callback
=for apidoc Amn|U32|GIMME_V
The XSUB-writer's equivalent to Perl's C<wantarray>. Returns C<G_VOID>,
C<G_SCALAR> or C<G_LIST> for void, scalar or list context,
respectively. See L<perlcall> for a usage example.
=for apidoc AmnD|U32|GIMME
A backward-compatible version of C<GIMME_V> which can only return
C<G_SCALAR> or C<G_LIST>; in a void context, it returns C<G_SCALAR>.
Deprecated. Use C<GIMME_V> instead.
=cut
*/
#define GIMME_V Perl_gimme_V(aTHX)
/* Public flags */
#define OPf_WANT 3 /* Mask for "want" bits: */
#define OPf_WANT_VOID 1 /* Want nothing */
#define OPf_WANT_SCALAR 2 /* Want single value */
#define OPf_WANT_LIST 3 /* Want list of any length */
#define OPf_KIDS 4 /* There is a firstborn child. */
#define OPf_PARENS 8 /* This operator was parenthesized. */
/* (Or block needs explicit scope entry.) */
#define OPf_REF 16 /* Certified reference. */
/* (Return container, not containee). */
#define OPf_MOD 32 /* Will modify (lvalue). */
#define OPf_STACKED 64 /* Some arg is arriving on the stack. */
/* Indicates mutator-variant of op for those
* ops which support them, e.g. $x += 1
*/
#define OPf_SPECIAL 128 /* Do something weird for this op: */
/* On local LVAL, don't init local value. */
/* On OP_SORT, subroutine is inlined. */
/* On OP_NOT, inversion was implicit. */
/* On OP_LEAVE, don't restore curpm, e.g.
* /(...)/ while ...>; */
/* On truncate, we truncate filehandle */
/* On control verbs, we saw no label */
/* On flipflop, we saw ... instead of .. */
/* On UNOPs, saw bare parens, e.g. eof(). */
/* On OP_CHDIR, handle (or bare parens) */
/* On OP_NULL, saw a "do". */
/* On OP_EXISTS, treat av as av, not avhv. */
/* On OP_(ENTER|LEAVE)EVAL, don't clear $@ */
/* On regcomp, "use re 'eval'" was in scope */
/* On RV2[ACGHS]V, don't create GV--in
defined()*/
/* On OP_DBSTATE, indicates breakpoint
* (runtime property) */
/* On OP_REQUIRE, was seen as CORE::require */
/* On OP_(ENTER|LEAVE)WHEN, there's
no condition */
/* On OP_SMARTMATCH, an implicit smartmatch */
/* On OP_ANONHASH and OP_ANONLIST, create a
reference to the new anon hash or array */
/* On OP_HELEM, OP_MULTIDEREF and OP_HSLICE,
localization will be followed by assignment,
so do not wipe the target if it is special
(e.g. a glob or a magic SV) */
/* On OP_MATCH, OP_SUBST & OP_TRANS, the
operand of a logical or conditional
that was optimised away, so it should
not be bound via =~ */
/* On OP_CONST, from a constant CV */
/* On OP_GLOB, two meanings:
- Before ck_glob, called as CORE::glob
- After ck_glob, use Perl glob function
*/
/* On OP_PADRANGE, push @_ */
/* On OP_DUMP, has no label */
/* On OP_UNSTACK, in a C-style for loop */
/* On OP_READLINE, it's for <<>>, not <> */
/* On OP_RETURN, module_true is in effect */
/* On OP_NEXT/OP_LAST/OP_REDO, there is no
* loop label */
/* On OP_OPEN, create a temporary file if the
* filename argument is &PL_sv_undef */
/* There is no room in op_flags for this one, so it has its own bit-
field member (op_folded) instead. The flag is only used to tell
op_convert_list to set op_folded. */
#define OPf_FOLDED (1<<16)
/* old names; don't use in new code, but don't break them, either */
#define OPf_LIST OPf_WANT_LIST
#define OPf_KNOW OPf_WANT
#if !defined(PERL_CORE) && !defined(PERL_EXT)
# define GIMME \
(PL_op->op_flags & OPf_WANT \
? ((PL_op->op_flags & OPf_WANT) == OPf_WANT_LIST \
? G_LIST \
: G_SCALAR) \
: dowantarray())
#endif
/* NOTE: OPp* flags are now auto-generated and defined in opcode.h,
* from data in regen/op_private */
#define OPpTRANS_ALL (OPpTRANS_USE_SVOP|OPpTRANS_CAN_FORCE_UTF8|OPpTRANS_IDENTICAL|OPpTRANS_SQUASH|OPpTRANS_COMPLEMENT|OPpTRANS_GROWS|OPpTRANS_DELETE)
#define OPpTRANS_FROM_UTF OPpTRANS_USE_SVOP
#define OPpTRANS_TO_UTF OPpTRANS_CAN_FORCE_UTF8
/* Mask for OP_ENTERSUB flags, the absence of which must be propagated
in dynamic context */
#define OPpENTERSUB_LVAL_MASK (OPpLVAL_INTRO|OPpENTERSUB_INARGS)
/* things that can be elements of op_aux */
typedef union {
PADOFFSET pad_offset;
SV *sv;
IV iv;
UV uv;
char *pv;
SSize_t ssize;
} UNOP_AUX_item;
#ifdef USE_ITHREADS
# define UNOP_AUX_item_sv(item) PAD_SVl((item)->pad_offset);
#else
# define UNOP_AUX_item_sv(item) ((item)->sv);
#endif
struct op {
BASEOP
};
struct unop {
BASEOP
OP * op_first;
};
struct unop_aux {
BASEOP
OP *op_first;
UNOP_AUX_item *op_aux;
};
struct binop {
BASEOP
OP * op_first;
OP * op_last;
};
struct logop {
BASEOP
OP * op_first;
/* Note that op->op_other is the *next* op in execution order of the
* alternate branch, not the root of the subtree. I.e. imagine it being
* called ->op_otherfirst.
* To find the structural subtree root (what could be called
* ->op_otherroot), use OpSIBLING of ->op_first */
OP * op_other;
};
struct listop {
BASEOP
OP * op_first;
OP * op_last;
};
struct methop {
BASEOP
union {
/* op_u.op_first *must* be aligned the same as the op_first
* field of the other op types */
OP* op_first; /* optree for method name */
SV* op_meth_sv; /* static method name */
} op_u;
#ifdef USE_ITHREADS
PADOFFSET op_rclass_targ; /* pad index for redirect class */
#else
SV* op_rclass_sv; /* static redirect class $o->A::meth() */
#endif
};
struct pmop {
BASEOP
OP * op_first;
OP * op_last;
#ifdef USE_ITHREADS
PADOFFSET op_pmoffset;
#else
REGEXP * op_pmregexp; /* compiled expression */
#endif
U32 op_pmflags;
union {
OP * op_pmreplroot; /* For OP_SUBST */
PADOFFSET op_pmtargetoff; /* For OP_SPLIT lex ary or thr GV */
GV * op_pmtargetgv; /* For OP_SPLIT non-threaded GV */
} op_pmreplrootu;
union {
OP * op_pmreplstart; /* Only used in OP_SUBST */
#ifdef USE_ITHREADS
PADOFFSET op_pmstashoff; /* Only used in OP_MATCH, with PMf_ONCE set */
#else
HV * op_pmstash;
#endif
} op_pmstashstartu;
OP * op_code_list; /* list of (?{}) code blocks */
};
#ifdef USE_ITHREADS
#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 { \
REGEXP *const _pm_setre = (r); \
assert(_pm_setre); \
PL_regex_pad[(o)->op_pmoffset] = MUTABLE_SV(_pm_setre); \
} STMT_END
#else
#define PM_GETRE(o) ((o)->op_pmregexp)
#define PM_SETRE(o,r) ((o)->op_pmregexp = (r))
#endif
/* Currently these PMf flags occupy a single 32-bit word. Not all bits are
* currently used. The lower bits are shared with their corresponding RXf flag
* bits, up to but not including _RXf_PMf_SHIFT_NEXT. The unused bits
* immediately follow; finally the used Pmf-only (unshared) bits, so that the
* highest bit in the word is used. This gathers all the unused bits as a pool
* in the middle, like so: 11111111111111110000001111111111
* where the '1's represent used bits, and the '0's unused. This design allows
* us to allocate off one end of the pool if we need to add a shared bit, and
* off the other end if we need a non-shared bit, without disturbing the other
* bits. This maximizes the likelihood of being able to change things without
* breaking binary compatibility.
*
* To add shared bits, do so in op_reg_common.h. This should change
* _RXf_PMf_SHIFT_NEXT so that things won't compile. Then come to regexp.h and
* op.h and adjust the constant adders in the definitions of PMf_BASE_SHIFT and
* Pmf_BASE_SHIFT down by the number of shared bits you added. That's it.
* Things should be binary compatible. But if either of these gets to having
* to subtract rather than add, leave at 0 and adjust all the entries below
* that are in terms of this according. But if the first one of those is
* already PMf_BASE_SHIFT+0, there are no bits left, and a redesign is in
* order.
*
* To remove unshared bits, just delete its entry. If you're where breaking
* binary compatibility is ok to do, you might want to adjust things to move
* the newly opened space so that it gets absorbed into the common pool.
*
* To add unshared bits, first use up any gaps in the middle. Otherwise,
* allocate off the low end until you get to PMf_BASE_SHIFT+0. If that isn't
* enough, move PMf_BASE_SHIFT down (if possible) and add the new bit at the
* other end instead; this preserves binary compatibility. */
#define PMf_BASE_SHIFT (_RXf_PMf_SHIFT_NEXT+2)
/* Set by the parser if it discovers an error, so the regex shouldn't be
* compiled */
#define PMf_HAS_ERROR (1U<<(PMf_BASE_SHIFT+3))
/* 'use re "taint"' in scope: taint $1 etc. if target tainted */
#define PMf_RETAINT (1U<<(PMf_BASE_SHIFT+4))
/* match successfully only once per reset, with related flag RXf_USED in
* re->extflags holding state. This is used only for ?? matches, and only on
* OP_MATCH and OP_QR */
#define PMf_ONCE (1U<<(PMf_BASE_SHIFT+5))
/* PMf_ONCE, i.e. ?pat?, has matched successfully. Not used under threading. */
#define PMf_USED (1U<<(PMf_BASE_SHIFT+6))
/* subst replacement is constant */
#define PMf_CONST (1U<<(PMf_BASE_SHIFT+7))
/* keep 1st runtime pattern forever */
#define PMf_KEEP (1U<<(PMf_BASE_SHIFT+8))
#define PMf_GLOBAL (1U<<(PMf_BASE_SHIFT+9)) /* pattern had a g modifier */
/* don't reset pos() if //g fails */
#define PMf_CONTINUE (1U<<(PMf_BASE_SHIFT+10))
/* evaluating replacement as expr */
#define PMf_EVAL (1U<<(PMf_BASE_SHIFT+11))
/* Return substituted string instead of modifying it. */
#define PMf_NONDESTRUCT (1U<<(PMf_BASE_SHIFT+12))
/* the pattern has a CV attached (currently only under qr/...(?{}).../) */
#define PMf_HAS_CV (1U<<(PMf_BASE_SHIFT+13))
/* op_code_list is private; don't free it etc. It may well point to
* code within another sub, with different pad etc */
#define PMf_CODELIST_PRIVATE (1U<<(PMf_BASE_SHIFT+14))
/* the PMOP is a QR (we should be able to detect that from the op type,
* but the regex compilation API passes just the pm flags, not the op
* itself */
#define PMf_IS_QR (1U<<(PMf_BASE_SHIFT+15))
#define PMf_USE_RE_EVAL (1U<<(PMf_BASE_SHIFT+16)) /* use re'eval' in scope */
/* Means that this is a subpattern being compiled while processing a \p{}
* wildcard. This isn't called from op.c, but it is passed as a pm flag. */
#define PMf_WILDCARD (1U<<(PMf_BASE_SHIFT+17))
/* See comments at the beginning of these defines about adding bits. The
* highest bit position should be used, so that if PMf_BASE_SHIFT gets
* increased, the #error below will be triggered so that you will be reminded
* to adjust things at the other end to keep the bit positions unchanged */
#if PMf_BASE_SHIFT+17 > 31
# error Too many PMf_ bits used. See above and regnodes.h for any spare in middle
#endif
#ifdef USE_ITHREADS
# define PmopSTASH(o) ((o)->op_pmflags & PMf_ONCE \
? PL_stashpad[(o)->op_pmstashstartu.op_pmstashoff] \
: NULL)
# define PmopSTASH_set(o,hv) \
(assert_((o)->op_pmflags & PMf_ONCE) \
(o)->op_pmstashstartu.op_pmstashoff = \
(hv) ? alloccopstash(hv) : 0)
#else
# define PmopSTASH(o) \
(((o)->op_pmflags & PMf_ONCE) ? (o)->op_pmstashstartu.op_pmstash : NULL)
# if defined (DEBUGGING) && defined(PERL_USE_GCC_BRACE_GROUPS)
# define PmopSTASH_set(o,hv) ({ \
assert((o)->op_pmflags & PMf_ONCE); \
((o)->op_pmstashstartu.op_pmstash = (hv)); \
})
# else
# define PmopSTASH_set(o,hv) ((o)->op_pmstashstartu.op_pmstash = (hv))
# endif
#endif
#define PmopSTASHPV(o) (PmopSTASH(o) ? HvNAME_get(PmopSTASH(o)) : NULL)
/* op_pmstashstartu.op_pmstash is not refcounted */
#define PmopSTASHPV_set(o,pv) PmopSTASH_set((o), gv_stashpv(pv,GV_ADD))
struct svop {
BASEOP
SV * op_sv;
};
struct padop {
BASEOP
PADOFFSET op_padix;
};
struct pvop {
BASEOP
char * op_pv;
};
struct loop {
BASEOP
OP * op_first;
OP * op_last;
OP * op_redoop;
OP * op_nextop;
OP * op_lastop;
};
#define cUNOPx(o) ((UNOP*)(o))
#define cUNOP_AUXx(o) ((UNOP_AUX*)(o))
#define cBINOPx(o) ((BINOP*)(o))
#define cLISTOPx(o) ((LISTOP*)(o))
#define cLOGOPx(o) ((LOGOP*)(o))
#define cPMOPx(o) ((PMOP*)(o))
#define cSVOPx(o) ((SVOP*)(o))
#define cPADOPx(o) ((PADOP*)(o))
#define cPVOPx(o) ((PVOP*)(o))
#define cCOPx(o) ((COP*)(o))
#define cLOOPx(o) ((LOOP*)(o))
#define cMETHOPx(o) ((METHOP*)(o))
#define cUNOP cUNOPx(PL_op)
#define cUNOP_AUX cUNOP_AUXx(PL_op)
#define cBINOP cBINOPx(PL_op)
#define cLISTOP cLISTOPx(PL_op)
#define cLOGOP cLOGOPx(PL_op)
#define cPMOP cPMOPx(PL_op)
#define cSVOP cSVOPx(PL_op)
#define cPADOP cPADOPx(PL_op)
#define cPVOP cPVOPx(PL_op)
#define cCOP cCOPx(PL_op)
#define cLOOP cLOOPx(PL_op)
#define cMETHOP cMETHOPx(PL_op)
#define cUNOPo cUNOPx(o)
#define cUNOP_AUXo cUNOP_AUXx(o)
#define cBINOPo cBINOPx(o)
#define cLISTOPo cLISTOPx(o)
#define cLOGOPo cLOGOPx(o)
#define cPMOPo cPMOPx(o)
#define cSVOPo cSVOPx(o)
#define cPADOPo cPADOPx(o)
#define cPVOPo cPVOPx(o)
#define cCOPo cCOPx(o)
#define cLOOPo cLOOPx(o)
#define cMETHOPo cMETHOPx(o)
#define kUNOP cUNOPx(kid)
#define kUNOP_AUX cUNOP_AUXx(kid)
#define kBINOP cBINOPx(kid)
#define kLISTOP cLISTOPx(kid)
#define kLOGOP cLOGOPx(kid)
#define kPMOP cPMOPx(kid)
#define kSVOP cSVOPx(kid)
#define kPADOP cPADOPx(kid)
#define kPVOP cPVOPx(kid)
#define kCOP cCOPx(kid)
#define kLOOP cLOOPx(kid)
#define kMETHOP cMETHOPx(kid)
typedef enum {
OPclass_NULL, /* 0 */
OPclass_BASEOP, /* 1 */
OPclass_UNOP, /* 2 */
OPclass_BINOP, /* 3 */
OPclass_LOGOP, /* 4 */
OPclass_LISTOP, /* 5 */
OPclass_PMOP, /* 6 */
OPclass_SVOP, /* 7 */
OPclass_PADOP, /* 8 */
OPclass_PVOP, /* 9 */
OPclass_LOOP, /* 10 */
OPclass_COP, /* 11 */
OPclass_METHOP, /* 12 */
OPclass_UNOP_AUX /* 13 */
} OPclass;
#ifdef USE_ITHREADS
# define cGVOPx_gv(o) ((GV*)PAD_SVl(cPADOPx(o)->op_padix))
# ifndef PERL_CORE
# define IS_PADGV(v) (v && isGV(v))
# define IS_PADCONST(v) \
(v && (SvREADONLY(v) || (SvIsCOW(v) && !SvLEN(v))))
# endif
# define cSVOPx_sv(v) (cSVOPx(v)->op_sv \
? cSVOPx(v)->op_sv : PAD_SVl((v)->op_targ))
# define cSVOPx_svp(v) (cSVOPx(v)->op_sv \
? &cSVOPx(v)->op_sv : &PAD_SVl((v)->op_targ))
# define cMETHOPx_meth(v) (cMETHOPx(v)->op_u.op_meth_sv \
? cMETHOPx(v)->op_u.op_meth_sv : PAD_SVl((v)->op_targ))
# define cMETHOPx_rclass(v) PAD_SVl(cMETHOPx(v)->op_rclass_targ)
#else
# define cGVOPx_gv(o) ((GV*)cSVOPx(o)->op_sv)
# ifndef PERL_CORE
# define IS_PADGV(v) FALSE
# define IS_PADCONST(v) FALSE
# endif
# define cSVOPx_sv(v) (cSVOPx(v)->op_sv)
# define cSVOPx_svp(v) (&cSVOPx(v)->op_sv)
# define cMETHOPx_meth(v) (cMETHOPx(v)->op_u.op_meth_sv)
# define cMETHOPx_rclass(v) (cMETHOPx(v)->op_rclass_sv)
#endif
#define cMETHOP_meth cMETHOPx_meth(PL_op)
#define cMETHOP_rclass cMETHOPx_rclass(PL_op)
#define cMETHOPo_meth cMETHOPx_meth(o)
#define cMETHOPo_rclass cMETHOPx_rclass(o)
#define cGVOP_gv cGVOPx_gv(PL_op)
#define cGVOPo_gv cGVOPx_gv(o)
#define kGVOP_gv cGVOPx_gv(kid)
#define cSVOP_sv cSVOPx_sv(PL_op)
#define cSVOPo_sv cSVOPx_sv(o)
#define kSVOP_sv cSVOPx_sv(kid)
#ifndef PERL_CORE
# define Nullop ((OP*)NULL)
#endif
/* Lowest byte of PL_opargs */
#define OA_MARK 1
#define OA_FOLDCONST 2
#define OA_RETSCALAR 4
#define OA_TARGET 8
#define OA_TARGLEX 16
#define OA_OTHERINT 32
#define OA_DANGEROUS 64
#define OA_DEFGV 128
/* The next 4 bits (8..11) encode op class information */
#define OCSHIFT 8
#define OA_CLASS_MASK (15 << OCSHIFT)
#define OA_BASEOP (0 << OCSHIFT)
#define OA_UNOP (1 << OCSHIFT)
#define OA_BINOP (2 << OCSHIFT)
#define OA_LOGOP (3 << OCSHIFT)
#define OA_LISTOP (4 << OCSHIFT)
#define OA_PMOP (5 << OCSHIFT)
#define OA_SVOP (6 << OCSHIFT)
#define OA_PADOP (7 << OCSHIFT)
#define OA_PVOP_OR_SVOP (8 << OCSHIFT)
#define OA_LOOP (9 << OCSHIFT)
#define OA_COP (10 << OCSHIFT)
#define OA_BASEOP_OR_UNOP (11 << OCSHIFT)
#define OA_FILESTATOP (12 << OCSHIFT)
#define OA_LOOPEXOP (13 << OCSHIFT)
#define OA_METHOP (14 << OCSHIFT)
#define OA_UNOP_AUX (15 << OCSHIFT)
/* Each remaining nybble of PL_opargs (i.e. bits 12..15, 16..19 etc)
* encode the type for each arg */
#define OASHIFT 12
#define OA_SCALAR 1
#define OA_LIST 2
#define OA_AVREF 3
#define OA_HVREF 4
#define OA_CVREF 5
#define OA_FILEREF 6
#define OA_SCALARREF 7
#define OA_OPTIONAL 8
/* Op_REFCNT is a reference count at the head of each op tree: needed
* since the tree is shared between threads, and between cloned closure
* copies in the same thread. OP_REFCNT_LOCK/UNLOCK is used when modifying
* this count.
* The same mutex is used to protect the refcounts of the reg_trie_data
* and reg_ac_data structures, which are shared between duplicated
* regexes.
* The same mutex is used to protect the refcounts for RCPV objects.
*/
#ifdef USE_ITHREADS
# define OP_REFCNT_INIT MUTEX_INIT(&PL_op_mutex)
# ifdef PERL_CORE
# define OP_REFCNT_LOCK MUTEX_LOCK(&PL_op_mutex)
# define OP_REFCNT_UNLOCK MUTEX_UNLOCK(&PL_op_mutex)
# else /* Subject non-core uses to clang thread safety analysis */
# define OP_REFCNT_LOCK op_refcnt_lock()
# define OP_REFCNT_UNLOCK op_refcnt_unlock()
# endif
# define OP_REFCNT_TERM MUTEX_DESTROY(&PL_op_mutex)
#else
# define OP_REFCNT_INIT NOOP
# define OP_REFCNT_LOCK NOOP
# define OP_REFCNT_UNLOCK NOOP
# define OP_REFCNT_TERM NOOP
#endif
#define OpREFCNT_set(o,n) ((o)->op_targ = (n))
#ifdef PERL_DEBUG_READONLY_OPS
# define OpREFCNT_inc(o) Perl_op_refcnt_inc(aTHX_ o)
# define OpREFCNT_dec(o) Perl_op_refcnt_dec(aTHX_ o)
#else
# define OpREFCNT_inc(o) ((o) ? (++(o)->op_targ, (o)) : NULL)
# define OpREFCNT_dec(o) (--(o)->op_targ)
#endif
/* flags used by Perl_load_module() */
#define PERL_LOADMOD_DENY 0x1 /* no Module */
#define PERL_LOADMOD_NOIMPORT 0x2 /* use Module () */
#define PERL_LOADMOD_IMPORT_OPS 0x4 /* import arguments
are passed as a sin-
gle op tree, not a
list of SVs */
#if defined(PERL_IN_PERLY_C) || defined(PERL_IN_OP_C) || defined(PERL_IN_TOKE_C)
#define Perl_ref(mTHX, o, type) Perl_doref(aTHX_ o, type, TRUE)
#endif
/* translation table attached to OP_TRANS/OP_TRANSR ops */
typedef struct {
Size_t size; /* number of entries in map[], not including final slot */
short map[1]; /* Unwarranted chumminess */
} OPtrans_map;
/*
=for apidoc_section $optree_manipulation
=for apidoc Am|OP*|LINKLIST|OP *o
Given the root of an optree, link the tree in execution order using the
C<op_next> pointers and return the first op executed. If this has
already been done, it will not be redone, and C<< o->op_next >> will be
returned. If C<< o->op_next >> is not already set, C<o> should be at
least an C<UNOP>.
=cut
*/
#define LINKLIST(o) ((o)->op_next ? (o)->op_next : op_linklist((OP*)o))
/* no longer used anywhere in core */
#ifndef PERL_CORE
#define cv_ckproto(cv, gv, p) \
cv_ckproto_len_flags((cv), (gv), (p), (p) ? strlen(p) : 0, 0)
#endif
#ifdef PERL_CORE
# define my(o) my_attrs((o), NULL)
#endif
#ifdef USE_REENTRANT_API
#include "reentr.h"
#endif
#define NewOp(m,var,c,type) \
(var = (type *) Perl_Slab_Alloc(aTHX_ c*sizeof(type)))
#define NewOpSz(m,var,size) \
(var = (OP *) Perl_Slab_Alloc(aTHX_ size))
#define FreeOp(p) Perl_Slab_Free(aTHX_ p)
/*
* The per-CV op slabs consist of a header (the opslab struct) and a bunch
* of space for allocating op slots, each of which consists of two pointers
* followed by an op. The first pointer points to the next op slot. The
* second points to the slab. At the end of the slab is a null pointer,
* so that slot->opslot_next - slot can be used to determine the size
* of the op.
*
* Each CV can have multiple slabs; opslab_next points to the next slab, to
* form a chain. All bookkeeping is done on the first slab, which is where
* all the op slots point.
*
* Freed ops are marked as freed and attached to the freed chain
* via op_next pointers.
*
* When there is more than one slab, the second slab in the slab chain is
* assumed to be the one with free space available. It is used when allo-
* cating an op if there are no freed ops available or big enough.
*/
#ifdef PERL_CORE
struct opslot {
U16 opslot_size; /* size of this slot (in pointers) */
U16 opslot_offset; /* offset from start of slab (in ptr units) */
OP opslot_op; /* the op itself */
};
struct opslab {
OPSLAB * opslab_next; /* next slab */
OPSLAB * opslab_head; /* first slab in chain */
OP ** opslab_freed; /* array of sized chains of freed ops (head only)*/
size_t opslab_refcnt; /* number of ops (head slab only) */
U16 opslab_freed_size; /* allocated size of opslab_freed */
U16 opslab_size; /* size of slab in pointers,
including header */
U16 opslab_free_space; /* space available in this slab
for allocating new ops (in ptr
units) */
# ifdef PERL_DEBUG_READONLY_OPS
bool opslab_readonly;
# endif
OPSLOT opslab_slots; /* slots begin here */
};
# define OPSLOT_HEADER STRUCT_OFFSET(OPSLOT, opslot_op)
# define OpSLOT(o) (assert_(o->op_slabbed) \
(OPSLOT *)(((char *)o)-OPSLOT_HEADER))
/* the slab that owns this op */
# define OpMySLAB(o) \
((OPSLAB*)((char *)((I32**)OpSLOT(o) - OpSLOT(o)->opslot_offset)-STRUCT_OFFSET(struct opslab, opslab_slots)))
/* the first (head) opslab of the chain in which this op is allocated */
# define OpSLAB(o) \
(OpMySLAB(o)->opslab_head)
/* calculate the slot given the owner slab and an offset */
#define OpSLOToff(slab, offset) \
((OPSLOT*)(((I32 **)&(slab)->opslab_slots)+(offset)))
# define OpslabREFCNT_dec(slab) \
(((slab)->opslab_refcnt == 1) \
? opslab_free_nopad(slab) \
: (void)--(slab)->opslab_refcnt)
/* Variant that does not null out the pads */
# define OpslabREFCNT_dec_padok(slab) \
(((slab)->opslab_refcnt == 1) \
? opslab_free(slab) \
: (void)--(slab)->opslab_refcnt)
#endif
struct block_hooks {
U32 bhk_flags;
void (*bhk_start) (pTHX_ int full);
void (*bhk_pre_end) (pTHX_ OP **seq);
void (*bhk_post_end) (pTHX_ OP **seq);
void (*bhk_eval) (pTHX_ OP *const saveop);
};
/*
=for apidoc_section $scope
=for apidoc mx|U32|BhkFLAGS|BHK *hk
Return the BHK's flags.
=for apidoc mxu|void *|BhkENTRY|BHK *hk|token which
Return an entry from the BHK structure. C<which> is a preprocessor token
indicating which entry to return. If the appropriate flag is not set
this will return C<NULL>. The type of the return value depends on which
entry you ask for.
=for apidoc Amxu|void|BhkENTRY_set|BHK *hk|token which|void *ptr
Set an entry in the BHK structure, and set the flags to indicate it is
valid. C<which> is a preprocessing token indicating which entry to set.
The type of C<ptr> depends on the entry.
=for apidoc Amxu|void|BhkDISABLE|BHK *hk|token which
Temporarily disable an entry in this BHK structure, by clearing the
appropriate flag. C<which> is a preprocessor token indicating which
entry to disable.
=for apidoc Amxu|void|BhkENABLE|BHK *hk|token which
Re-enable an entry in this BHK structure, by setting the appropriate
flag. C<which> is a preprocessor token indicating which entry to enable.
This will assert (under -DDEBUGGING) if the entry doesn't contain a valid
pointer.
=for apidoc mxu|void|CALL_BLOCK_HOOKS|token which|arg
Call all the registered block hooks for type C<which>. C<which> is a
preprocessing token; the type of C<arg> depends on C<which>.
=cut
*/
#define BhkFLAGS(hk) ((hk)->bhk_flags)
#define BHKf_bhk_start 0x01
#define BHKf_bhk_pre_end 0x02
#define BHKf_bhk_post_end 0x04
#define BHKf_bhk_eval 0x08
#define BhkENTRY(hk, which) \
((BhkFLAGS(hk) & BHKf_ ## which) ? ((hk)->which) : NULL)
#define BhkENABLE(hk, which) \
STMT_START { \
BhkFLAGS(hk) |= BHKf_ ## which; \
assert(BhkENTRY(hk, which)); \
} STMT_END
#define BhkDISABLE(hk, which) \
STMT_START { \
BhkFLAGS(hk) &= ~(BHKf_ ## which); \
} STMT_END
#define BhkENTRY_set(hk, which, ptr) \
STMT_START { \
(hk)->which = ptr; \
BhkENABLE(hk, which); \
} STMT_END
#define CALL_BLOCK_HOOKS(which, arg) \
STMT_START { \
if (PL_blockhooks) { \
SSize_t i; \
for (i = av_top_index(PL_blockhooks); i >= 0; i--) { \
SV *sv = AvARRAY(PL_blockhooks)[i]; \
BHK *hk; \
\
assert(SvIOK(sv)); \
if (SvUOK(sv)) \
hk = INT2PTR(BHK *, SvUVX(sv)); \
else \
hk = INT2PTR(BHK *, SvIVX(sv)); \
\
if (BhkENTRY(hk, which)) \
BhkENTRY(hk, which)(aTHX_ arg); \
} \
} \
} STMT_END
/* flags for rv2cv_op_cv */
#define RV2CVOPCV_MARK_EARLY 0x00000001
#define RV2CVOPCV_RETURN_NAME_GV 0x00000002
#define RV2CVOPCV_RETURN_STUB 0x00000004
#if defined(PERL_CORE) || defined(PERL_EXT) /* behaviour of this flag is subject to change: */
# define RV2CVOPCV_MAYBE_NAME_GV 0x00000008
#endif
#define RV2CVOPCV_FLAG_MASK 0x0000000f /* all of the above */
#define op_lvalue(op,t) Perl_op_lvalue_flags(aTHX_ op,t,0)
/* flags for op_lvalue_flags */
#define OP_LVALUE_NO_CROAK 1
/*
=for apidoc_section $custom
=for apidoc Am|U32|XopFLAGS|XOP *xop
Return the XOP's flags.
=for apidoc Amu||XopENTRY|XOP *xop|token which
Return a member of the XOP structure. C<which> is a cpp token
indicating which entry to return. If the member is not set
this will return a default value. The return type depends
on C<which>. This macro evaluates its arguments more than
once. If you are using C<Perl_custom_op_xop> to retrieve a
C<XOP *> from a C<OP *>, use the more efficient L</XopENTRYCUSTOM> instead.
=for apidoc Amu||XopENTRYCUSTOM|const OP *o|token which
Exactly like C<XopENTRY(XopENTRY(Perl_custom_op_xop(aTHX_ o), which)> but more
efficient. The C<which> parameter is identical to L</XopENTRY>.
=for apidoc Amu|void|XopENTRY_set|XOP *xop|token which|value
Set a member of the XOP structure. C<which> is a cpp token
indicating which entry to set. See L<perlguts/"Custom Operators">
for details about the available members and how
they are used. This macro evaluates its argument
more than once.
=for apidoc Amu|void|XopDISABLE|XOP *xop|token which
Temporarily disable a member of the XOP, by clearing the appropriate flag.
=for apidoc Amu|void|XopENABLE|XOP *xop|token which
Reenable a member of the XOP which has been disabled.
=cut
*/
struct custom_op {
U32 xop_flags;
const char *xop_name;
const char *xop_desc;
U32 xop_class;
void (*xop_peep)(pTHX_ OP *o, OP *oldop);
void (*xop_dump)(pTHX_ const OP *o, struct Perl_OpDumpContext *ctx);
};
/* return value of Perl_custom_op_get_field, similar to void * then casting but
the U32 doesn't need truncation on 64 bit platforms in the caller, also
for easier macro writing */
typedef union {
const char *xop_name;
const char *xop_desc;
U32 xop_class;
void (*xop_peep)(pTHX_ OP *o, OP *oldop);
void (*xop_dump)(pTHX_ const OP *o, struct Perl_OpDumpContext *ctx);
XOP *xop_ptr;
} XOPRETANY;
#define XopFLAGS(xop) ((xop)->xop_flags)
#define XOPf_xop_name 0x01
#define XOPf_xop_desc 0x02
#define XOPf_xop_class 0x04
#define XOPf_xop_peep 0x08
#define XOPf_xop_dump 0x10
/* used by Perl_custom_op_get_field for option checking */
typedef enum {
XOPe_xop_ptr = 0, /* just get the XOP *, don't look inside it */
XOPe_xop_name = XOPf_xop_name,
XOPe_xop_desc = XOPf_xop_desc,
XOPe_xop_class = XOPf_xop_class,
XOPe_xop_peep = XOPf_xop_peep,
XOPe_xop_dump = XOPf_xop_dump,
} xop_flags_enum;
#define XOPd_xop_name PL_op_name[OP_CUSTOM]
#define XOPd_xop_desc PL_op_desc[OP_CUSTOM]
#define XOPd_xop_class OA_BASEOP
#define XOPd_xop_peep ((Perl_cpeep_t)0)
#define XOPd_xop_dump NULL
#define XopENTRY_set(xop, which, to) \
STMT_START { \
(xop)->which = (to); \
(xop)->xop_flags |= XOPf_ ## which; \
} STMT_END
#define XopENTRY(xop, which) \
((XopFLAGS(xop) & XOPf_ ## which) ? (xop)->which : XOPd_ ## which)
#define XopENTRYCUSTOM(o, which) \
(Perl_custom_op_get_field(aTHX_ o, XOPe_ ## which).which)
#define XopDISABLE(xop, which) ((xop)->xop_flags &= ~XOPf_ ## which)
#define XopENABLE(xop, which) \
STMT_START { \
(xop)->xop_flags |= XOPf_ ## which; \
assert(XopENTRY(xop, which)); \
} STMT_END
#define Perl_custom_op_xop(x) \
(Perl_custom_op_get_field(x, XOPe_xop_ptr).xop_ptr)
/*
=for apidoc_section $optree_manipulation
=for apidoc Am|const char *|OP_NAME|OP *o
Return the name of the provided OP. For core ops this looks up the name
from the op_type; for custom ops from the op_ppaddr.
=for apidoc Am|const char *|OP_DESC|OP *o
Return a short description of the provided OP.
=for apidoc Am|U32|OP_CLASS|OP *o
Return the class of the provided OP: that is, which of the *OP
structures it uses. For core ops this currently gets the information out
of C<PL_opargs>, which does not always accurately reflect the type used;