/* cop.h * * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, * 2000, 2001, 2002, 2003, 2004, 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", \ &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 */ #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) # 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) # 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) : Nullch)) # 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) : Nullch) # 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) = Nullch)) # 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)) : 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)) : Nullch) # define CopSTASH(c) ((c)->cop_stash) # define CopSTASH_set(c,hv) ((c)->cop_stash = (hv)) # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME_get(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)) # define CopSTASH_free(c) # define CopFILE_free(c) (SvREFCNT_dec(CopFILEGV(c)),(CopFILEGV(c) = Nullgv)) #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 /* * 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; long 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 = Nullop; \ if (!CvDEPTH(cv)) { \ (void)SvREFCNT_inc(cv); \ (void)SvREFCNT_inc(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 = Nullop; \ cx->blk_sub.hasargs = 0; \ cx->blk_sub.dfoutgv = PL_defoutgv; \ (void)SvREFCNT_inc(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); \ SvPV_set(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); \ 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 = 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; 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_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.retop = Nullop; \ 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; OP * redo_op; OP * next_op; OP * last_op; #ifdef USE_ITHREADS void * iterdata; PAD *oldcomppad; #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) \ ? &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 = Nullsv; #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; #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 = 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 **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_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; 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 { 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 #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, 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 { \ 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. =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