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- /* cop.h
- *
- * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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.
- *
- * Control ops (cops) are one of the three ops OP_NEXTSTATE, OP_DBSTATE,
- * and OP_SETSTATE that (loosely speaking) are separate statements.
- * They hold information important for lexical state and error reporting.
- * At run time, PL_curcop is set to point to the most recently executed cop,
- * and thus can be used to determine our current state.
- */
-
- /* A jmpenv packages the state required to perform a proper non-local jump.
- * Note that there is a start_env initialized when perl starts, and top_env
- * points to this initially, so top_env should always be non-null.
- *
- * Existence of a non-null top_env->je_prev implies it is valid to call
- * longjmp() at that runlevel (we make sure start_env.je_prev is always
- * null to ensure this).
- *
- * je_mustcatch, when set at any runlevel to TRUE, means eval ops must
- * establish a local jmpenv to handle exception traps. Care must be taken
- * to restore the previous value of je_mustcatch before exiting the
- * stack frame iff JMPENV_PUSH was not called in that stack frame.
- * GSAR 97-03-27
- */
-
- struct jmpenv {
- struct jmpenv * je_prev;
- Sigjmp_buf je_buf; /* only for use if !je_throw */
- int je_ret; /* last exception thrown */
- bool je_mustcatch; /* need to call longjmp()? */
- };
-
- typedef struct jmpenv JMPENV;
-
- #ifdef OP_IN_REGISTER
- #define OP_REG_TO_MEM PL_opsave = op
- #define OP_MEM_TO_REG op = PL_opsave
- #else
- #define OP_REG_TO_MEM NOOP
- #define OP_MEM_TO_REG NOOP
- #endif
-
- /*
- * How to build the first jmpenv.
- *
- * top_env needs to be non-zero. It points to an area
- * in which longjmp() stuff is stored, as C callstack
- * info there at least is thread specific this has to
- * be per-thread. Otherwise a 'die' in a thread gives
- * that thread the C stack of last thread to do an eval {}!
- */
-
- #define JMPENV_BOOTSTRAP \
- STMT_START { \
- Zero(&PL_start_env, 1, JMPENV); \
- PL_start_env.je_ret = -1; \
- PL_start_env.je_mustcatch = TRUE; \
- PL_top_env = &PL_start_env; \
- } STMT_END
-
- /*
- * PERL_FLEXIBLE_EXCEPTIONS
- *
- * All the flexible exceptions code has been removed.
- * See the following threads for details:
- *
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/2004-07/msg00378.html
- *
- * Joshua's original patches (which weren't applied) and discussion:
- *
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01396.html
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01489.html
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01491.html
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg01608.html
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02144.html
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1998-02/msg02998.html
- *
- * Chip's reworked patch and discussion:
- *
- * http://www.xray.mpe.mpg.de/mailing-lists/perl5-porters/1999-03/msg00520.html
- *
- * The flaw in these patches (which went unnoticed at the time) was
- * that they moved some code that could potentially die() out of the
- * region protected by the setjmp()s. This caused exceptions within
- * END blocks and such to not be handled by the correct setjmp().
- *
- * The original patches that introduces flexible exceptions were:
- *
- * http://public.activestate.com/cgi-bin/perlbrowse?patch=3386
- * http://public.activestate.com/cgi-bin/perlbrowse?patch=5162
- */
-
- #define dJMPENV JMPENV cur_env
-
- #define JMPENV_PUSH(v) \
- STMT_START { \
- DEBUG_l(Perl_deb(aTHX_ "Setting up jumplevel %p, was %p\n", \
- (void*)&cur_env, (void*)PL_top_env)); \
- cur_env.je_prev = PL_top_env; \
- OP_REG_TO_MEM; \
- cur_env.je_ret = PerlProc_setjmp(cur_env.je_buf, SCOPE_SAVES_SIGNAL_MASK); \
- OP_MEM_TO_REG; \
- PL_top_env = &cur_env; \
- cur_env.je_mustcatch = FALSE; \
- (v) = cur_env.je_ret; \
- } STMT_END
-
- #define JMPENV_POP \
- STMT_START { \
- DEBUG_l(Perl_deb(aTHX_ "popping jumplevel was %p, now %p\n", \
- (void*)PL_top_env, (void*)cur_env.je_prev)); \
- PL_top_env = cur_env.je_prev; \
- } STMT_END
-
- #define JMPENV_JUMP(v) \
- STMT_START { \
- OP_REG_TO_MEM; \
- if (PL_top_env->je_prev) \
- PerlProc_longjmp(PL_top_env->je_buf, (v)); \
- if ((v) == 2) \
- PerlProc_exit(STATUS_EXIT); \
- PerlIO_printf(PerlIO_stderr(), "panic: top_env\n"); \
- PerlProc_exit(1); \
- } STMT_END
-
- #define CATCH_GET (PL_top_env->je_mustcatch)
- #define CATCH_SET(v) (PL_top_env->je_mustcatch = (v))
-
-
-
- struct cop {
- BASEOP
- /* On LP64 putting this here takes advantage of the fact that BASEOP isn't
- an exact multiple of 8 bytes to save structure padding. */
- line_t cop_line; /* line # of this command */
- char * cop_label; /* label for this construct */
- #ifdef USE_ITHREADS
- char * cop_stashpv; /* package line was compiled in */
- char * cop_file; /* file name the following line # is from */
- #else
- HV * cop_stash; /* package line was compiled in */
- GV * cop_filegv; /* file the following line # is from */
- #endif
- U32 cop_hints; /* hints bits from pragmata */
- U32 cop_seq; /* parse sequence number */
- /* Beware. mg.c and warnings.pl assume the type of this is STRLEN *: */
- STRLEN * cop_warnings; /* lexical warnings bitmask */
- /* compile time state of %^H. See the comment in op.c for how this is
- used to recreate a hash to return from caller. */
- struct refcounted_he * cop_hints_hash;
- };
-
- #ifdef USE_ITHREADS
- # define CopFILE(c) ((c)->cop_file)
- # define CopFILEGV(c) (CopFILE(c) \
- ? gv_fetchfile(CopFILE(c)) : NULL)
-
- # ifdef NETWARE
- # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv))
- # define CopFILE_setn(c,pv,l) ((c)->cop_file = savepv((pv),(l)))
- # else
- # define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv))
- # define CopFILE_setn(c,pv,l) ((c)->cop_file = savesharedpvn((pv),(l)))
- # endif
-
- # define CopFILESV(c) (CopFILE(c) \
- ? GvSV(gv_fetchfile(CopFILE(c))) : NULL)
- # define CopFILEAV(c) (CopFILE(c) \
- ? GvAV(gv_fetchfile(CopFILE(c))) : NULL)
- # ifdef DEBUGGING
- # define CopFILEAVx(c) (assert(CopFILE(c)), \
- GvAV(gv_fetchfile(CopFILE(c))))
- # else
- # define CopFILEAVx(c) (GvAV(gv_fetchfile(CopFILE(c))))
- # endif
- # define CopSTASHPV(c) ((c)->cop_stashpv)
-
- # ifdef NETWARE
- # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : NULL))
- # else
- # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv))
- # endif
-
- # define CopSTASH(c) (CopSTASHPV(c) \
- ? gv_stashpv(CopSTASHPV(c),GV_ADD) : NULL)
- # define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME_get(hv) : NULL)
- # define CopSTASH_eq(c,hv) ((hv) && stashpv_hvname_match(c,hv))
- # define CopLABEL(c) ((c)->cop_label)
- # define CopLABEL_set(c,pv) (CopLABEL(c) = (pv))
- # ifdef NETWARE
- # define CopSTASH_free(c) SAVECOPSTASH_FREE(c)
- # define CopFILE_free(c) SAVECOPFILE_FREE(c)
- # define CopLABEL_free(c) SAVECOPLABEL_FREE(c)
- # define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
- # else
- # define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c))
- # define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = NULL))
- # define CopLABEL_free(c) (PerlMemShared_free(CopLABEL(c)),(CopLABEL(c) = NULL))
- # define CopLABEL_alloc(pv) ((pv)?savesharedpv(pv):NULL)
- # endif
- #else
- # define CopFILEGV(c) ((c)->cop_filegv)
- # define CopFILEGV_set(c,gv) ((c)->cop_filegv = (GV*)SvREFCNT_inc(gv))
- # define CopFILE_set(c,pv) CopFILEGV_set((c), gv_fetchfile(pv))
- # define CopFILE_setn(c,pv,l) CopFILEGV_set((c), gv_fetchfile_flags((pv),(l),0))
- # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : NULL)
- # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : NULL)
- # ifdef DEBUGGING
- # define CopFILEAVx(c) (assert(CopFILEGV(c)), GvAV(CopFILEGV(c)))
- # else
- # define CopFILEAVx(c) (GvAV(CopFILEGV(c)))
- # endif
- # define CopFILE(c) (CopFILEGV(c) && GvSV(CopFILEGV(c)) \
- ? SvPVX(GvSV(CopFILEGV(c))) : NULL)
- # define CopSTASH(c) ((c)->cop_stash)
- # define CopLABEL(c) ((c)->cop_label)
- # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv))
- # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(CopSTASH(c)) : NULL)
- /* cop_stash is not refcounted */
- # define CopSTASHPV_set(c,pv) CopSTASH_set((c), gv_stashpv(pv,GV_ADD))
- # define CopSTASH_eq(c,hv) (CopSTASH(c) == (hv))
- # define CopLABEL_alloc(pv) ((pv)?savepv(pv):NULL)
- # define CopLABEL_set(c,pv) (CopLABEL(c) = (pv))
- # define CopSTASH_free(c)
- # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL))
- # define CopLABEL_free(c) (Safefree(CopLABEL(c)),(CopLABEL(c) = NULL))
-
- #endif /* USE_ITHREADS */
-
- #define CopSTASH_ne(c,hv) (!CopSTASH_eq(c,hv))
- #define CopLINE(c) ((c)->cop_line)
- #define CopLINE_inc(c) (++CopLINE(c))
- #define CopLINE_dec(c) (--CopLINE(c))
- #define CopLINE_set(c,l) (CopLINE(c) = (l))
-
- /* OutCopFILE() is CopFILE for output (caller, die, warn, etc.) */
- #ifdef MACOS_TRADITIONAL
- # define OutCopFILE(c) MacPerl_MPWFileName(CopFILE(c))
- #else
- # define OutCopFILE(c) CopFILE(c)
- #endif
-
- /* If $[ is non-zero, it's stored in cop_hints under the key "$[", and
- HINT_ARYBASE is set to indicate this.
- Setting it is ineficient due to the need to create 2 mortal SVs, but as
- using $[ is highly discouraged, no sane Perl code will be using it. */
- #define CopARYBASE_get(c) \
- ((CopHINTS_get(c) & HINT_ARYBASE) \
- ? SvIV(Perl_refcounted_he_fetch(aTHX_ (c)->cop_hints_hash, 0, \
- "$[", 2, 0, 0)) \
- : 0)
- #define CopARYBASE_set(c, b) STMT_START { \
- if (b || ((c)->cop_hints & HINT_ARYBASE)) { \
- (c)->cop_hints |= HINT_ARYBASE; \
- if ((c) == &PL_compiling) \
- PL_hints |= HINT_LOCALIZE_HH | HINT_ARYBASE; \
- (c)->cop_hints_hash \
- = Perl_refcounted_he_new(aTHX_ (c)->cop_hints_hash, \
- sv_2mortal(newSVpvs("$[")), \
- sv_2mortal(newSViv(b))); \
- } \
- } STMT_END
-
- /* FIXME NATIVE_HINTS if this is changed from op_private (see perl.h) */
- #define CopHINTS_get(c) ((c)->cop_hints + 0)
- #define CopHINTS_set(c, h) STMT_START { \
- (c)->cop_hints = (h); \
- } STMT_END
-
- /*
- * Here we have some enormously heavy (or at least ponderous) wizardry.
- */
-
- /* subroutine context */
- struct block_sub {
- CV * cv;
- GV * gv;
- GV * dfoutgv;
- AV * savearray;
- AV * argarray;
- I32 olddepth;
- U8 hasargs;
- U8 lval; /* XXX merge lval and hasargs? */
- PAD *oldcomppad;
- OP * retop; /* op to execute on exit from sub */
- };
-
- /* base for the next two macros. Don't use directly.
- * Note that the refcnt of the cv is incremented twice; The CX one is
- * decremented by LEAVESUB, the other by LEAVE. */
-
- #define PUSHSUB_BASE(cx) \
- cx->blk_sub.cv = cv; \
- cx->blk_sub.olddepth = CvDEPTH(cv); \
- cx->blk_sub.hasargs = hasargs; \
- cx->blk_sub.retop = NULL; \
- if (!CvDEPTH(cv)) { \
- SvREFCNT_inc_simple_void_NN(cv); \
- SvREFCNT_inc_simple_void_NN(cv); \
- SAVEFREESV(cv); \
- }
-
-
- #define PUSHSUB(cx) \
- PUSHSUB_BASE(cx) \
- cx->blk_sub.lval = PL_op->op_private & \
- (OPpLVAL_INTRO|OPpENTERSUB_INARGS);
-
- /* variant for use by OP_DBSTATE, where op_private holds hint bits */
- #define PUSHSUB_DB(cx) \
- PUSHSUB_BASE(cx) \
- cx->blk_sub.lval = 0;
-
-
- #define PUSHFORMAT(cx) \
- cx->blk_sub.cv = cv; \
- cx->blk_sub.gv = gv; \
- cx->blk_sub.retop = NULL; \
- cx->blk_sub.hasargs = 0; \
- cx->blk_sub.dfoutgv = PL_defoutgv; \
- SvREFCNT_inc_void(cx->blk_sub.dfoutgv)
-
- #define POP_SAVEARRAY() \
- STMT_START { \
- SvREFCNT_dec(GvAV(PL_defgv)); \
- GvAV(PL_defgv) = cx->blk_sub.savearray; \
- } STMT_END
-
- /* junk in @_ spells trouble when cloning CVs and in pp_caller(), so don't
- * leave any (a fast av_clear(ary), basically) */
- #define CLEAR_ARGARRAY(ary) \
- STMT_START { \
- AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \
- AvARRAY(ary) = AvALLOC(ary); \
- AvFILLp(ary) = -1; \
- } STMT_END
-
- #define POPSUB(cx,sv) \
- STMT_START { \
- if (cx->blk_sub.hasargs) { \
- POP_SAVEARRAY(); \
- /* abandon @_ if it got reified */ \
- if (AvREAL(cx->blk_sub.argarray)) { \
- const SSize_t fill = AvFILLp(cx->blk_sub.argarray); \
- SvREFCNT_dec(cx->blk_sub.argarray); \
- cx->blk_sub.argarray = newAV(); \
- av_extend(cx->blk_sub.argarray, fill); \
- AvREIFY_only(cx->blk_sub.argarray); \
- CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \
- } \
- else { \
- CLEAR_ARGARRAY(cx->blk_sub.argarray); \
- } \
- } \
- sv = (SV*)cx->blk_sub.cv; \
- if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \
- sv = NULL; \
- } STMT_END
-
- #define LEAVESUB(sv) \
- STMT_START { \
- if (sv) \
- SvREFCNT_dec(sv); \
- } STMT_END
-
- #define POPFORMAT(cx) \
- setdefout(cx->blk_sub.dfoutgv); \
- SvREFCNT_dec(cx->blk_sub.dfoutgv);
-
- /* eval context */
- struct block_eval {
- U8 old_in_eval;
- U16 old_op_type;
- SV * old_namesv;
- OP * old_eval_root;
- SV * cur_text;
- CV * cv;
- OP * retop; /* op to execute on exit from eval */
- JMPENV * cur_top_env; /* value of PL_top_env when eval CX created */
- };
-
- #define PUSHEVAL(cx,n,fgv) \
- STMT_START { \
- cx->blk_eval.old_in_eval = PL_in_eval; \
- cx->blk_eval.old_op_type = PL_op->op_type; \
- cx->blk_eval.old_namesv = (n ? newSVpv(n,0) : NULL); \
- cx->blk_eval.old_eval_root = PL_eval_root; \
- cx->blk_eval.cur_text = PL_parser ? PL_parser->linestr : NULL; \
- cx->blk_eval.cv = NULL; /* set by doeval(), as applicable */ \
- cx->blk_eval.retop = NULL; \
- cx->blk_eval.cur_top_env = PL_top_env; \
- } STMT_END
-
- #define POPEVAL(cx) \
- STMT_START { \
- PL_in_eval = cx->blk_eval.old_in_eval; \
- optype = cx->blk_eval.old_op_type; \
- PL_eval_root = cx->blk_eval.old_eval_root; \
- if (cx->blk_eval.old_namesv) \
- sv_2mortal(cx->blk_eval.old_namesv); \
- } STMT_END
-
- /* loop context */
- struct block_loop {
- char * label;
- I32 resetsp;
- LOOP * my_op; /* My op, that contains redo, next and last ops. */
- /* (except for non_ithreads we need to modify next_op in pp_ctl.c, hence
- why next_op is conditionally defined below.) */
- #ifdef USE_ITHREADS
- void * iterdata;
- PAD *oldcomppad;
- #else
- OP * next_op;
- SV ** itervar;
- #endif
- SV * itersave;
- /* (from inspection of source code) for a .. range of strings this is the
- current string. */
- SV * iterlval;
- /* (from inspection of source code) for a foreach loop this is the array
- being iterated over. For a .. range of numbers it's the current value.
- A check is often made on the SvTYPE of iterary to determine whether
- we are iterating over an array or a range. (numbers or strings) */
- AV * iterary;
- IV iterix;
- /* (from inspection of source code) for a .. range of numbers this is the
- maximum value. */
- IV itermax;
- };
- /* It might be possible to squeeze this structure further. As best I can tell
- itermax and iterlval are never used at the same time, so it might be possible
- to make them into a union. However, I'm not confident that there are enough
- flag bits/NULLable pointers in this structure alone to encode which is
- active. There is, however, U8 of space free in struct block, which could be
- used. Right now it may not be worth squeezing this structure further, as it's
- the largest part of struct block, and currently struct block is 64 bytes on
- an ILP32 system, which will give good cache alignment.
- */
-
- #ifdef USE_ITHREADS
- # define CxITERVAR(c) \
- ((c)->blk_loop.iterdata \
- ? (CxPADLOOP(cx) \
- ? &CX_CURPAD_SV( (c)->blk_loop, \
- INT2PTR(PADOFFSET, (c)->blk_loop.iterdata)) \
- : &GvSV((GV*)(c)->blk_loop.iterdata)) \
- : (SV**)NULL)
- # define CX_ITERDATA_SET(cx,idata) \
- CX_CURPAD_SAVE(cx->blk_loop); \
- if ((cx->blk_loop.iterdata = (idata))) \
- cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
- else \
- cx->blk_loop.itersave = NULL;
- #else
- # define CxITERVAR(c) ((c)->blk_loop.itervar)
- # define CX_ITERDATA_SET(cx,ivar) \
- if ((cx->blk_loop.itervar = (SV**)(ivar))) \
- cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \
- else \
- cx->blk_loop.itersave = NULL;
- #endif
-
- #ifdef USE_ITHREADS
- # define PUSHLOOP_OP_NEXT /* No need to do anything. */
- # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.my_op->op_nextop + 0)
- #else
- # define PUSHLOOP_OP_NEXT cx->blk_loop.next_op = cLOOP->op_nextop
- # define CX_LOOP_NEXTOP_GET(cx) ((cx)->blk_loop.next_op + 0)
- #endif
-
- #define PUSHLOOP(cx, dat, s) \
- cx->blk_loop.label = PL_curcop->cop_label; \
- cx->blk_loop.resetsp = s - PL_stack_base; \
- cx->blk_loop.my_op = cLOOP; \
- PUSHLOOP_OP_NEXT; \
- cx->blk_loop.iterlval = NULL; \
- cx->blk_loop.iterary = NULL; \
- cx->blk_loop.iterix = -1; \
- CX_ITERDATA_SET(cx,dat);
-
- #define POPLOOP(cx) \
- SvREFCNT_dec(cx->blk_loop.iterlval); \
- if (CxITERVAR(cx)) { \
- if (SvPADMY(cx->blk_loop.itersave)) { \
- SV ** const s_v_p = CxITERVAR(cx); \
- sv_2mortal(*s_v_p); \
- *s_v_p = cx->blk_loop.itersave; \
- } \
- else { \
- SvREFCNT_dec(cx->blk_loop.itersave); \
- } \
- } \
- if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\
- SvREFCNT_dec(cx->blk_loop.iterary);
-
- /* given/when context */
- struct block_givwhen {
- OP *leave_op;
- };
-
- #define PUSHGIVEN(cx) \
- cx->blk_givwhen.leave_op = cLOGOP->op_other;
-
- #define PUSHWHEN PUSHGIVEN
-
- /* context common to subroutines, evals and loops */
- struct block {
- U16 blku_type; /* what kind of context this is */
- U8 blku_gimme; /* is this block running in list context? */
- U8 blku_spare; /* Padding to match with struct subst */
- I32 blku_oldsp; /* stack pointer to copy stuff down to */
- COP * blku_oldcop; /* old curcop pointer */
- I32 blku_oldmarksp; /* mark stack index */
- I32 blku_oldscopesp; /* scope stack index */
- PMOP * blku_oldpm; /* values of pattern match vars */
-
- union {
- struct block_sub blku_sub;
- struct block_eval blku_eval;
- struct block_loop blku_loop;
- struct block_givwhen blku_givwhen;
- } blk_u;
- };
- #define blk_oldsp cx_u.cx_blk.blku_oldsp
- #define blk_oldcop cx_u.cx_blk.blku_oldcop
- #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp
- #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp
- #define blk_oldpm cx_u.cx_blk.blku_oldpm
- #define blk_gimme cx_u.cx_blk.blku_gimme
- #define blk_sub cx_u.cx_blk.blk_u.blku_sub
- #define blk_eval cx_u.cx_blk.blk_u.blku_eval
- #define blk_loop cx_u.cx_blk.blk_u.blku_loop
- #define blk_givwhen cx_u.cx_blk.blk_u.blku_givwhen
-
- /* Enter a block. */
- #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \
- cx->cx_type = t, \
- cx->blk_oldsp = sp - PL_stack_base, \
- cx->blk_oldcop = PL_curcop, \
- cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \
- cx->blk_oldscopesp = PL_scopestack_ix, \
- cx->blk_oldpm = PL_curpm, \
- cx->blk_gimme = (U8)gimme; \
- DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \
- (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); )
-
- /* Exit a block (RETURN and LAST). */
- #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \
- newsp = PL_stack_base + cx->blk_oldsp, \
- PL_curcop = cx->blk_oldcop, \
- PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
- PL_scopestack_ix = cx->blk_oldscopesp, \
- pm = cx->blk_oldpm, \
- gimme = cx->blk_gimme; \
- DEBUG_SCOPE("POPBLOCK"); \
- DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \
- (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); )
-
- /* Continue a block elsewhere (NEXT and REDO). */
- #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \
- PL_stack_sp = PL_stack_base + cx->blk_oldsp, \
- PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \
- PL_scopestack_ix = cx->blk_oldscopesp, \
- PL_curpm = cx->blk_oldpm; \
- DEBUG_SCOPE("TOPBLOCK");
-
- /* substitution context */
- struct subst {
- U16 sbu_type; /* what kind of context this is */
- U8 sbu_once; /* Actually both booleans, but U8 to matches */
- U8 sbu_rxtainted; /* struct block */
- I32 sbu_iters;
- I32 sbu_maxiters;
- I32 sbu_rflags;
- I32 sbu_oldsave;
- char * sbu_orig;
- SV * sbu_dstr;
- SV * sbu_targ;
- char * sbu_s;
- char * sbu_m;
- char * sbu_strend;
- void * sbu_rxres;
- REGEXP * sbu_rx;
- };
- #define sb_iters cx_u.cx_subst.sbu_iters
- #define sb_maxiters cx_u.cx_subst.sbu_maxiters
- #define sb_rflags cx_u.cx_subst.sbu_rflags
- #define sb_oldsave cx_u.cx_subst.sbu_oldsave
- #define sb_once cx_u.cx_subst.sbu_once
- #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted
- #define sb_orig cx_u.cx_subst.sbu_orig
- #define sb_dstr cx_u.cx_subst.sbu_dstr
- #define sb_targ cx_u.cx_subst.sbu_targ
- #define sb_s cx_u.cx_subst.sbu_s
- #define sb_m cx_u.cx_subst.sbu_m
- #define sb_strend cx_u.cx_subst.sbu_strend
- #define sb_rxres cx_u.cx_subst.sbu_rxres
- #define sb_rx cx_u.cx_subst.sbu_rx
-
- #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \
- cx->sb_iters = iters, \
- cx->sb_maxiters = maxiters, \
- cx->sb_rflags = r_flags, \
- cx->sb_oldsave = oldsave, \
- cx->sb_once = once, \
- cx->sb_rxtainted = rxtainted, \
- cx->sb_orig = orig, \
- cx->sb_dstr = dstr, \
- cx->sb_targ = targ, \
- cx->sb_s = s, \
- cx->sb_m = m, \
- cx->sb_strend = strend, \
- cx->sb_rxres = NULL, \
- cx->sb_rx = rx, \
- cx->cx_type = CXt_SUBST; \
- rxres_save(&cx->sb_rxres, rx); \
- (void)ReREFCNT_inc(rx)
-
- #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \
- rxres_free(&cx->sb_rxres); \
- ReREFCNT_dec(cx->sb_rx)
-
- struct context {
- union {
- struct block cx_blk;
- struct subst cx_subst;
- } cx_u;
- };
- #define cx_type cx_u.cx_subst.sbu_type
-
- #define CXTYPEMASK 0xff
- #define CXt_NULL 0
- #define CXt_SUB 1
- #define CXt_EVAL 2
- #define CXt_LOOP 3
- #define CXt_SUBST 4
- #define CXt_BLOCK 5
- #define CXt_FORMAT 6
- #define CXt_GIVEN 7
- #define CXt_WHEN 8
-
- /* private flags for CXt_SUB and CXt_NULL */
- #define CXp_MULTICALL 0x00000400 /* part of a multicall (so don't
- tear down context on exit). */
-
- /* private flags for CXt_EVAL */
- #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */
- #define CXp_TRYBLOCK 0x00000200 /* eval{}, not eval'' or similar */
-
- /* private flags for CXt_LOOP */
- #define CXp_FOREACH 0x00000200 /* a foreach loop */
- #define CXp_FOR_DEF 0x00000400 /* foreach using $_ */
- #ifdef USE_ITHREADS
- # define CXp_PADVAR 0x00000100 /* itervar lives on pad, iterdata
- has pad offset; if not set,
- iterdata holds GV* */
- # define CxPADLOOP(c) (((c)->cx_type & (CXt_LOOP|CXp_PADVAR)) \
- == (CXt_LOOP|CXp_PADVAR))
- #endif
-
- #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK)
- #define CxMULTICALL(c) (((c)->cx_type & CXp_MULTICALL) \
- == CXp_MULTICALL)
- #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) \
- == (CXt_EVAL|CXp_REAL))
- #define CxTRYBLOCK(c) (((c)->cx_type & (CXt_EVAL|CXp_TRYBLOCK)) \
- == (CXt_EVAL|CXp_TRYBLOCK))
- #define CxFOREACH(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH)) \
- == (CXt_LOOP|CXp_FOREACH))
- #define CxFOREACHDEF(c) (((c)->cx_type & (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))\
- == (CXt_LOOP|CXp_FOREACH|CXp_FOR_DEF))
-
- #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc()))
-
- /*
- =head1 "Gimme" Values
- */
-
- /*
- =for apidoc AmU||G_SCALAR
- Used to indicate scalar context. See C<GIMME_V>, C<GIMME>, and
- L<perlcall>.
-
- =for apidoc AmU||G_ARRAY
- Used to indicate list context. See C<GIMME_V>, C<GIMME> and
- L<perlcall>.
-
- =for apidoc AmU||G_VOID
- Used to indicate void context. See C<GIMME_V> and L<perlcall>.
-
- =for apidoc AmU||G_DISCARD
- Indicates that arguments returned from a callback should be discarded. See
- L<perlcall>.
-
- =for apidoc AmU||G_EVAL
-
- Used to force a Perl C<eval> wrapper around a callback. See
- L<perlcall>.
-
- =for apidoc AmU||G_NOARGS
-
- Indicates that no arguments are being sent to a callback. See
- L<perlcall>.
-
- =cut
- */
-
- #define G_SCALAR 0
- #define G_ARRAY 1
- #define G_VOID 128 /* skip this bit when adding flags below */
-
- /* extra flags for Perl_call_* routines */
- #define G_DISCARD 2 /* Call FREETMPS.
- Don't change this without consulting the
- hash actions codes defined in hv.h */
- #define G_EVAL 4 /* Assume eval {} around subroutine call. */
- #define G_NOARGS 8 /* Don't construct a @_ array. */
- #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */
- #define G_NODEBUG 32 /* Disable debugging at toplevel. */
- #define G_METHOD 64 /* Calling method. */
- #define G_FAKINGEVAL 256 /* Faking an eval context for call_sv or
- fold_constants. */
-
- /* flag bits for PL_in_eval */
- #define EVAL_NULL 0 /* not in an eval */
- #define EVAL_INEVAL 1 /* some enclosing scope is an eval */
- #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */
- #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */
- #define EVAL_INREQUIRE 8 /* The code is being required. */
-
- /* Support for switching (stack and block) contexts.
- * This ensures magic doesn't invalidate local stack and cx pointers.
- */
-
- #define PERLSI_UNKNOWN -1
- #define PERLSI_UNDEF 0
- #define PERLSI_MAIN 1
- #define PERLSI_MAGIC 2
- #define PERLSI_SORT 3
- #define PERLSI_SIGNAL 4
- #define PERLSI_OVERLOAD 5
- #define PERLSI_DESTROY 6
- #define PERLSI_WARNHOOK 7
- #define PERLSI_DIEHOOK 8
- #define PERLSI_REQUIRE 9
-
- struct stackinfo {
- AV * si_stack; /* stack for current runlevel */
- PERL_CONTEXT * si_cxstack; /* context stack for runlevel */
- struct stackinfo * si_prev;
- struct stackinfo * si_next;
- I32 si_cxix; /* current context index */
- I32 si_cxmax; /* maximum allocated index */
- I32 si_type; /* type of runlevel */
- I32 si_markoff; /* offset where markstack begins for us.
- * currently used only with DEBUGGING,
- * but not #ifdef-ed for bincompat */
- };
-
- typedef struct stackinfo PERL_SI;
-
- #define cxstack (PL_curstackinfo->si_cxstack)
- #define cxstack_ix (PL_curstackinfo->si_cxix)
- #define cxstack_max (PL_curstackinfo->si_cxmax)
-
- #ifdef DEBUGGING
- # define SET_MARK_OFFSET \
- PL_curstackinfo->si_markoff = PL_markstack_ptr - PL_markstack
- #else
- # define SET_MARK_OFFSET NOOP
- #endif
-
- #define PUSHSTACKi(type) \
- STMT_START { \
- PERL_SI *next = PL_curstackinfo->si_next; \
- if (!next) { \
- next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \
- next->si_prev = PL_curstackinfo; \
- PL_curstackinfo->si_next = next; \
- } \
- next->si_type = type; \
- next->si_cxix = -1; \
- AvFILLp(next->si_stack) = 0; \
- SWITCHSTACK(PL_curstack,next->si_stack); \
- PL_curstackinfo = next; \
- SET_MARK_OFFSET; \
- } STMT_END
-
- #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN)
-
- /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by
- * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */
- #define POPSTACK \
- STMT_START { \
- dSP; \
- PERL_SI * const prev = PL_curstackinfo->si_prev; \
- if (!prev) { \
- PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \
- my_exit(1); \
- } \
- SWITCHSTACK(PL_curstack,prev->si_stack); \
- /* don't free prev here, free them all at the END{} */ \
- PL_curstackinfo = prev; \
- } STMT_END
-
- #define POPSTACK_TO(s) \
- STMT_START { \
- while (PL_curstack != s) { \
- dounwind(-1); \
- POPSTACK; \
- } \
- } STMT_END
-
- #define IN_PERL_COMPILETIME (PL_curcop == &PL_compiling)
- #define IN_PERL_RUNTIME (PL_curcop != &PL_compiling)
-
- /*
- =head1 Multicall Functions
-
- =for apidoc Ams||dMULTICALL
- Declare local variables for a multicall. See L<perlcall/Lightweight Callbacks>.
-
- =for apidoc Ams||PUSH_MULTICALL
- Opening bracket for a lightweight callback.
- See L<perlcall/Lightweight Callbacks>.
-
- =for apidoc Ams||MULTICALL
- Make a lightweight callback. See L<perlcall/Lightweight Callbacks>.
-
- =for apidoc Ams||POP_MULTICALL
- Closing bracket for a lightweight callback.
- See L<perlcall/Lightweight Callbacks>.
-
- =cut
- */
-
- #define dMULTICALL \
- SV **newsp; /* set by POPBLOCK */ \
- PERL_CONTEXT *cx; \
- CV *multicall_cv; \
- OP *multicall_cop; \
- bool multicall_oldcatch; \
- U8 hasargs = 0 /* used by PUSHSUB */
-
- #define PUSH_MULTICALL(the_cv) \
- STMT_START { \
- CV * const _nOnclAshIngNamE_ = the_cv; \
- CV * const cv = _nOnclAshIngNamE_; \
- AV * const padlist = CvPADLIST(cv); \
- ENTER; \
- multicall_oldcatch = CATCH_GET; \
- SAVETMPS; SAVEVPTR(PL_op); \
- CATCH_SET(TRUE); \
- PUSHBLOCK(cx, CXt_SUB|CXp_MULTICALL, PL_stack_sp); \
- PUSHSUB(cx); \
- if (++CvDEPTH(cv) >= 2) { \
- PERL_STACK_OVERFLOW_CHECK(); \
- Perl_pad_push(aTHX_ padlist, CvDEPTH(cv)); \
- } \
- SAVECOMPPAD(); \
- PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv)); \
- multicall_cv = cv; \
- multicall_cop = CvSTART(cv); \
- } STMT_END
-
- #define MULTICALL \
- STMT_START { \
- PL_op = multicall_cop; \
- CALLRUNOPS(aTHX); \
- } STMT_END
-
- #define POP_MULTICALL \
- STMT_START { \
- LEAVESUB(multicall_cv); \
- CvDEPTH(multicall_cv)--; \
- POPBLOCK(cx,PL_curpm); \
- CATCH_SET(multicall_oldcatch); \
- LEAVE; \
- } STMT_END
-
- /*
- * Local variables:
- * c-indentation-style: bsd
- * c-basic-offset: 4
- * indent-tabs-mode: t
- * End:
- *
- * ex: set ts=8 sts=4 sw=4 noet:
- */
-