X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=cop.h;h=f0429b17a974fbc34759e65a16a130f92519d29c;hb=3ae345e35a0fa71a6a704dcc7c7f9ff029895bcd;hp=396cb8232a86310fd4d2416c88b2132a6e54059e;hpb=3ffa152759d1d5d220b783e0d587e418401204fb;p=p5sagit%2Fp5-mst-13.2.git diff --git a/cop.h b/cop.h index 396cb82..f0429b1 100644 --- a/cop.h +++ b/cop.h @@ -1,6 +1,7 @@ /* cop.h * - * Copyright (c) 1991-2002, Larry Wall + * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + * 2000, 2001, 2002, 2003, 2004, 2005, 2006 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. @@ -12,6 +13,126 @@ * 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", \ + &cur_env, 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", \ + PL_top_env, 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 char * cop_label; /* label for this construct */ @@ -29,64 +150,66 @@ struct cop { SV * cop_io; /* lexical IO defaults */ }; -#define Nullcop Null(COP*) - #ifdef USE_ITHREADS # define CopFILE(c) ((c)->cop_file) # define CopFILEGV(c) (CopFILE(c) \ - ? gv_fetchfile(CopFILE(c)) : Nullgv) + ? gv_fetchfile(CopFILE(c)) : NULL) - #ifdef NETWARE - #define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) - #else - #define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) - #endif +# ifdef NETWARE +# define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) +# else +# define CopFILE_set(c,pv) ((c)->cop_file = savesharedpv(pv)) +# endif # define CopFILESV(c) (CopFILE(c) \ - ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) + ? GvSV(gv_fetchfile(CopFILE(c))) : NULL) # define CopFILEAV(c) (CopFILE(c) \ - ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) + ? 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) : Nullch)) - #else - #define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savesharedpv(pv)) - #endif +# 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) : Nullhv) -# define CopSTASH_set(c,hv) CopSTASHPV_set(c, (hv) ? HvNAME(hv) : Nullch) -# define CopSTASH_eq(c,hv) ((hv) \ - && (CopSTASHPV(c) == HvNAME(hv) \ - || (CopSTASHPV(c) && HvNAME(hv) \ - && strEQ(CopSTASHPV(c), HvNAME(hv))))) - #ifdef NETWARE - #define CopSTASH_free(c) SAVECOPSTASH_FREE(c) - #else - #define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) - #endif - - #ifdef NETWARE - #define CopFILE_free(c) SAVECOPFILE_FREE(c) - #else - #define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = Nullch)) - #endif + ? 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)) +# ifdef NETWARE +# define CopSTASH_free(c) SAVECOPSTASH_FREE(c) +# define CopFILE_free(c) SAVECOPFILE_FREE(c) +# else +# define CopSTASH_free(c) PerlMemShared_free(CopSTASHPV(c)) +# define CopFILE_free(c) (PerlMemShared_free(CopFILE(c)),(CopFILE(c) = 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 CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) -# define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) -# define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) +# 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) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : NULL) # define CopSTASH(c) ((c)->cop_stash) # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) -# define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) +# 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 CopSTASH_free(c) -# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv)) +# define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = NULL)) #endif /* USE_ITHREADS */ @@ -118,13 +241,24 @@ struct block_sub { 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 */ +/* 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.hasargs = hasargs; \ + cx->blk_sub.retop = NULL; \ + if (!CvDEPTH(cv)) { \ + (void)SvREFCNT_inc(cv); \ + (void)SvREFCNT_inc(cv); \ + SAVEFREESV(cv); \ + } + #define PUSHSUB(cx) \ PUSHSUB_BASE(cx) \ @@ -140,6 +274,7 @@ struct block_sub { #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; \ (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) @@ -155,7 +290,7 @@ struct block_sub { #define CLEAR_ARGARRAY(ary) \ STMT_START { \ AvMAX(ary) += AvARRAY(ary) - AvALLOC(ary); \ - SvPVX(ary) = (char*)AvALLOC(ary); \ + SvPV_set(ary, (char*)AvALLOC(ary)); \ AvFILLp(ary) = -1; \ } STMT_END @@ -169,7 +304,7 @@ struct block_sub { SvREFCNT_dec(cx->blk_sub.argarray); \ cx->blk_sub.argarray = newAV(); \ av_extend(cx->blk_sub.argarray, fill); \ - AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ + AvREIFY_only(cx->blk_sub.argarray); \ CX_CURPAD_SV(cx->blk_sub, 0) = (SV*)cx->blk_sub.argarray; \ } \ else { \ @@ -178,7 +313,7 @@ struct block_sub { } \ sv = (SV*)cx->blk_sub.cv; \ if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ - sv = Nullsv; \ + sv = NULL; \ } STMT_END #define LEAVESUB(sv) \ @@ -199,16 +334,20 @@ struct block_eval { 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) : Nullsv); \ + 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_linestr; \ - cx->blk_eval.cv = Nullcv; /* set by doeval(), as applicable */ \ + 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) \ @@ -253,14 +392,14 @@ struct block_loop { if ((cx->blk_loop.iterdata = (idata))) \ cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); \ else \ - cx->blk_loop.itersave = Nullsv; + 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 = Nullsv; + cx->blk_loop.itersave = NULL; #endif #define PUSHLOOP(cx, dat, s) \ @@ -269,26 +408,40 @@ struct block_loop { cx->blk_loop.redo_op = cLOOP->op_redoop; \ cx->blk_loop.next_op = cLOOP->op_nextop; \ cx->blk_loop.last_op = cLOOP->op_lastop; \ - cx->blk_loop.iterlval = Nullsv; \ - cx->blk_loop.iterary = Nullav; \ + 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)) { \ - SV **s_v_p = CxITERVAR(cx); \ - sv_2mortal(*s_v_p); \ - *s_v_p = cx->blk_loop.itersave; \ + if (SvPADMY(cx->blk_loop.itersave)) { \ + SV **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 { I32 blku_oldsp; /* stack pointer to copy stuff down to */ COP * blku_oldcop; /* old curcop pointer */ - I32 blku_oldretsp; /* return stack index */ I32 blku_oldmarksp; /* mark stack index */ I32 blku_oldscopesp; /* scope stack index */ PMOP * blku_oldpm; /* values of pattern match vars */ @@ -298,11 +451,11 @@ struct block { 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_oldretsp cx_u.cx_blk.blku_oldretsp #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 @@ -310,6 +463,7 @@ struct block { #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], \ @@ -318,7 +472,6 @@ struct block { cx->blk_oldcop = PL_curcop, \ cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ cx->blk_oldscopesp = PL_scopestack_ix, \ - cx->blk_oldretsp = PL_retstack_ix, \ cx->blk_oldpm = PL_curpm, \ cx->blk_gimme = (U8)gimme; \ DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ @@ -330,9 +483,9 @@ struct block { PL_curcop = cx->blk_oldcop, \ PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ PL_scopestack_ix = cx->blk_oldscopesp, \ - PL_retstack_ix = cx->blk_oldretsp, \ 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)]); ) @@ -341,8 +494,8 @@ struct block { PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ PL_scopestack_ix = cx->blk_oldscopesp, \ - PL_retstack_ix = cx->blk_oldretsp, \ - PL_curpm = cx->blk_oldpm + PL_curpm = cx->blk_oldpm; \ + DEBUG_SCOPE("TOPBLOCK"); /* substitution context */ struct subst { @@ -413,13 +566,21 @@ struct context { #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 */ -#ifdef USE_ITHREADS /* 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* */ @@ -428,10 +589,16 @@ struct context { #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())) @@ -552,7 +719,7 @@ typedef struct stackinfo PERL_SI; #define POPSTACK \ STMT_START { \ dSP; \ - PERL_SI *prev = PL_curstackinfo->si_prev; \ + PERL_SI * const prev = PL_curstackinfo->si_prev; \ if (!prev) { \ PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ my_exit(1); \ @@ -569,3 +736,70 @@ typedef struct stackinfo PERL_SI; 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. + +=for apidoc Ams||PUSH_MULTICALL +Opening bracket for a lightweight callback. +See L. + +=for apidoc Ams||MULTICALL +Make a lightweight callback. See L. + +=for apidoc Ams||POP_MULTICALL +Closing bracket for a lightweight callback. +See L. + +=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