/* cop.h * * Copyright (c) 1991-2001, Larry Wall * * You may distribute under the terms of either the GNU General Public * License or the Artistic License, as specified in the README file. * */ struct cop { BASEOP 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_seq; /* parse sequence number */ I32 cop_arybase; /* array base this line was compiled with */ line_t cop_line; /* line # of this command */ SV * cop_warnings; /* lexical warnings bitmask */ 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) # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) # define CopFILESV(c) (CopFILE(c) \ ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) # define CopFILEAV(c) (CopFILE(c) \ ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) # define CopSTASHPV(c) ((c)->cop_stashpv) # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = ((pv) ? savepv(pv) : Nullch)) # 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))))) #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 CopSTASH(c) ((c)->cop_stash) # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) /* 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)) #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)) /* * Here we have some enormously heavy (or at least ponderous) wizardry. */ /* subroutine context */ struct block_sub { CV * cv; GV * gv; GV * dfoutgv; #ifndef USE_THREADS AV * savearray; #endif /* USE_THREADS */ AV * argarray; U16 olddepth; U8 hasargs; U8 lval; /* XXX merge lval and hasargs? */ SV ** oldcurpad; }; #define PUSHSUB(cx) \ cx->blk_sub.cv = cv; \ cx->blk_sub.olddepth = CvDEPTH(cv); \ cx->blk_sub.hasargs = hasargs; \ cx->blk_sub.lval = PL_op->op_private & \ (OPpLVAL_INTRO|OPpENTERSUB_INARGS); #define PUSHFORMAT(cx) \ cx->blk_sub.cv = cv; \ cx->blk_sub.gv = gv; \ cx->blk_sub.hasargs = 0; \ cx->blk_sub.dfoutgv = PL_defoutgv; \ (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) #ifdef USE_THREADS # define POP_SAVEARRAY() NOOP #else # define POP_SAVEARRAY() \ STMT_START { \ SvREFCNT_dec(GvAV(PL_defgv)); \ GvAV(PL_defgv) = cx->blk_sub.savearray; \ } STMT_END #endif /* USE_THREADS */ /* 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); \ SvPVX(ary) = (char*)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)) { \ 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); \ AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ cx->blk_sub.oldcurpad[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 = Nullsv; \ } 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 { I32 old_in_eval; I32 old_op_type; SV * old_namesv; OP * old_eval_root; SV * cur_text; }; #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_eval_root = PL_eval_root; \ cx->blk_eval.cur_text = PL_linestr; \ } 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; OP * redo_op; OP * next_op; OP * last_op; #ifdef USE_ITHREADS void * iterdata; SV ** oldcurpad; #else SV ** itervar; #endif SV * itersave; SV * iterlval; AV * iterary; IV iterix; IV itermax; }; #ifdef USE_ITHREADS # define CxITERVAR(c) \ ((c)->blk_loop.iterdata \ ? (CxPADLOOP(cx) \ ? &((c)->blk_loop.oldcurpad)[(PADOFFSET)(c)->blk_loop.iterdata] \ : &GvSV((GV*)(c)->blk_loop.iterdata)) \ : (SV**)NULL) # define CX_ITERDATA_SET(cx,idata) \ cx->blk_loop.oldcurpad = PL_curpad; \ if ((cx->blk_loop.iterdata = (idata))) \ cx->blk_loop.itersave = SvREFCNT_inc(*CxITERVAR(cx)); #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)); #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.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.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 (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ SvREFCNT_dec(cx->blk_loop.iterary); /* 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 */ U8 blku_gimme; /* is this block running in list context? */ union { struct block_sub blku_sub; struct block_eval blku_eval; struct block_loop blku_loop; } 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 #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 /* 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_oldretsp = PL_retstack_ix, \ cx->blk_oldpm = PL_curpm, \ cx->blk_gimme = 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, \ PL_retstack_ix = cx->blk_oldretsp, \ pm = cx->blk_oldpm, \ gimme = cx->blk_gimme; \ 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_retstack_ix = cx->blk_oldretsp, \ PL_curpm = cx->blk_oldpm /* substitution context */ struct subst { I32 sbu_iters; I32 sbu_maxiters; I32 sbu_rflags; I32 sbu_oldsave; bool sbu_once; bool sbu_rxtainted; 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(void*), \ cx->sb_rx = rx, \ cx->cx_type = CXt_SUBST; \ rxres_save(&cx->sb_rxres, rx) #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ rxres_free(&cx->sb_rxres) struct context { U32 cx_type; /* what kind of context this is */ union { struct block cx_blk; struct subst cx_subst; } cx_u; }; #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 /* 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_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 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 CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) /* "gimme" values */ /* =for apidoc AmU||G_SCALAR Used to indicate scalar context. See C, C, and L. =for apidoc AmU||G_ARRAY Used to indicate list context. See C, C and L. =for apidoc AmU||G_VOID Used to indicate void context. See C and L. =for apidoc AmU||G_DISCARD Indicates that arguments returned from a callback should be discarded. See L. =for apidoc AmU||G_EVAL Used to force a Perl C wrapper around a callback. See L. =for apidoc AmU||G_NOARGS Indicates that no arguments are being sent to a callback. See L. =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. */ #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. */ /* 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 */ I32 si_cxix; /* current context index */ I32 si_cxmax; /* maximum allocated index */ I32 si_type; /* type of runlevel */ struct stackinfo * si_prev; struct stackinfo * si_next; 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 { \ djSP; \ PERL_SI *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