Commit | Line | Data |
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1 | /* cop.h |
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2 | * |
4eb8286e |
3 | * Copyright (c) 1991-1999, Larry Wall |
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4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
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8 | */ |
9 | |
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10 | struct cop { |
11 | BASEOP |
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12 | char * cop_label; /* label for this construct */ |
57843af0 |
13 | #ifdef USE_ITHREADS |
11faa288 |
14 | char * cop_stashpv; /* package line was compiled in */ |
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15 | char * cop_file; /* file name the following line # is from */ |
16 | #else |
11faa288 |
17 | HV * cop_stash; /* package line was compiled in */ |
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18 | GV * cop_filegv; /* file the following line # is from */ |
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19 | #endif |
a0d0e21e |
20 | U32 cop_seq; /* parse sequence number */ |
21 | I32 cop_arybase; /* array base this line was compiled with */ |
79072805 |
22 | line_t cop_line; /* line # of this command */ |
599cee73 |
23 | SV * cop_warnings; /* lexical warnings bitmask */ |
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24 | }; |
25 | |
26 | #define Nullcop Null(COP*) |
27 | |
57843af0 |
28 | #ifdef USE_ITHREADS |
29 | # define CopFILE(c) ((c)->cop_file) |
30 | # define CopFILEGV(c) (CopFILE(c) \ |
31 | ? gv_fetchfile(CopFILE(c)) : Nullgv) |
32 | # define CopFILE_set(c,pv) ((c)->cop_file = savepv(pv)) /* XXX */ |
33 | # define CopFILESV(c) (CopFILE(c) \ |
34 | ? GvSV(gv_fetchfile(CopFILE(c))) : Nullsv) |
35 | # define CopFILEAV(c) (CopFILE(c) \ |
36 | ? GvAV(gv_fetchfile(CopFILE(c))) : Nullav) |
57843af0 |
37 | # define CopSTASHPV(c) ((c)->cop_stashpv) |
11faa288 |
38 | # define CopSTASHPV_set(c,pv) ((c)->cop_stashpv = savepv(pv)) /* XXX */ |
39 | # define CopSTASH(c) (CopSTASHPV(c) \ |
40 | ? gv_stashpv(CopSTASHPV(c),GV_ADD) : Nullhv) |
41 | # define CopSTASH_set(c,hv) CopSTASHPV_set(c, HvNAME(hv)) |
57843af0 |
42 | #else |
43 | # define CopFILEGV(c) ((c)->cop_filegv) |
44 | # define CopFILEGV_set(c,gv) ((c)->cop_filegv = gv) |
45 | # define CopFILE_set(c,pv) ((c)->cop_filegv = gv_fetchfile(pv)) |
46 | # define CopFILESV(c) (CopFILEGV(c) ? GvSV(CopFILEGV(c)) : Nullsv) |
47 | # define CopFILEAV(c) (CopFILEGV(c) ? GvAV(CopFILEGV(c)) : Nullav) |
48 | # define CopFILE(c) (CopFILESV(c) ? SvPVX(CopFILESV(c)) : Nullch) |
49 | # define CopSTASH(c) ((c)->cop_stash) |
50 | # define CopSTASH_set(c,hv) ((c)->cop_stash = hv) |
51 | # define CopSTASHPV(c) (CopSTASH(c) ? HvNAME(CopSTASH(c)) : Nullch) |
11faa288 |
52 | # define CopSTASHPV_set(c,pv) CopSTASH_set(c, gv_stashpv(pv,GV_ADD)) |
57843af0 |
53 | #endif /* USE_ITHREADS */ |
54 | |
cc49e20b |
55 | #define CopLINE(c) ((c)->cop_line) |
57843af0 |
56 | #define CopLINE_inc(c) (++CopLINE(c)) |
57 | #define CopLINE_dec(c) (--CopLINE(c)) |
58 | #define CopLINE_set(c,l) (CopLINE(c) = (l)) |
cc49e20b |
59 | |
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60 | /* |
61 | * Here we have some enormously heavy (or at least ponderous) wizardry. |
62 | */ |
63 | |
64 | /* subroutine context */ |
65 | struct block_sub { |
66 | CV * cv; |
67 | GV * gv; |
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68 | GV * dfoutgv; |
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69 | #ifndef USE_THREADS |
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70 | AV * savearray; |
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71 | #endif /* USE_THREADS */ |
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72 | AV * argarray; |
73 | U16 olddepth; |
74 | U8 hasargs; |
cd06dffe |
75 | U8 lval; /* XXX merge lval and hasargs? */ |
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76 | }; |
77 | |
78 | #define PUSHSUB(cx) \ |
79 | cx->blk_sub.cv = cv; \ |
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80 | cx->blk_sub.olddepth = CvDEPTH(cv); \ |
cd06dffe |
81 | cx->blk_sub.hasargs = hasargs; \ |
82 | cx->blk_sub.lval = PL_op->op_private & \ |
83 | (OPpLVAL_INTRO|OPpENTERSUB_INARGS); |
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84 | |
85 | #define PUSHFORMAT(cx) \ |
86 | cx->blk_sub.cv = cv; \ |
87 | cx->blk_sub.gv = gv; \ |
4633a7c4 |
88 | cx->blk_sub.hasargs = 0; \ |
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89 | cx->blk_sub.dfoutgv = PL_defoutgv; \ |
4633a7c4 |
90 | (void)SvREFCNT_inc(cx->blk_sub.dfoutgv) |
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91 | |
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92 | #ifdef USE_THREADS |
93 | #define POPSAVEARRAY() NOOP |
94 | #else |
95 | #define POPSAVEARRAY() \ |
96 | STMT_START { \ |
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97 | SvREFCNT_dec(GvAV(PL_defgv)); \ |
a8bba7fa |
98 | GvAV(PL_defgv) = cx->blk_sub.savearray; \ |
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99 | } STMT_END |
100 | #endif /* USE_THREADS */ |
101 | |
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102 | #define POPSUB(cx,sv) \ |
103 | STMT_START { \ |
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104 | if (cx->blk_sub.hasargs) { \ |
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105 | POPSAVEARRAY(); \ |
d8b46c1b |
106 | /* abandon @_ if it got reified */ \ |
a8bba7fa |
107 | if (AvREAL(cx->blk_sub.argarray)) { \ |
108 | SSize_t fill = AvFILLp(cx->blk_sub.argarray); \ |
109 | SvREFCNT_dec(cx->blk_sub.argarray); \ |
110 | cx->blk_sub.argarray = newAV(); \ |
111 | av_extend(cx->blk_sub.argarray, fill); \ |
112 | AvFLAGS(cx->blk_sub.argarray) = AVf_REIFY; \ |
113 | PL_curpad[0] = (SV*)cx->blk_sub.argarray; \ |
d8b46c1b |
114 | } \ |
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115 | } \ |
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116 | sv = (SV*)cx->blk_sub.cv; \ |
117 | if (sv && (CvDEPTH((CV*)sv) = cx->blk_sub.olddepth)) \ |
118 | sv = Nullsv; \ |
119 | } STMT_END |
120 | |
121 | #define LEAVESUB(sv) \ |
122 | STMT_START { \ |
123 | if (sv) \ |
124 | SvREFCNT_dec(sv); \ |
125 | } STMT_END |
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126 | |
127 | #define POPFORMAT(cx) \ |
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128 | setdefout(cx->blk_sub.dfoutgv); \ |
129 | SvREFCNT_dec(cx->blk_sub.dfoutgv); |
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130 | |
131 | /* eval context */ |
132 | struct block_eval { |
133 | I32 old_in_eval; |
134 | I32 old_op_type; |
135 | char * old_name; |
136 | OP * old_eval_root; |
748a9306 |
137 | SV * cur_text; |
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138 | }; |
139 | |
8990e307 |
140 | #define PUSHEVAL(cx,n,fgv) \ |
3280af22 |
141 | cx->blk_eval.old_in_eval = PL_in_eval; \ |
a8bba7fa |
142 | cx->blk_eval.old_op_type = PL_op->op_type; \ |
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143 | cx->blk_eval.old_name = n; \ |
a8bba7fa |
144 | cx->blk_eval.old_eval_root = PL_eval_root; \ |
3280af22 |
145 | cx->blk_eval.cur_text = PL_linestr; |
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146 | |
147 | #define POPEVAL(cx) \ |
3280af22 |
148 | PL_in_eval = cx->blk_eval.old_in_eval; \ |
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149 | optype = cx->blk_eval.old_op_type; \ |
3280af22 |
150 | PL_eval_root = cx->blk_eval.old_eval_root; |
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151 | |
152 | /* loop context */ |
153 | struct block_loop { |
154 | char * label; |
155 | I32 resetsp; |
156 | OP * redo_op; |
157 | OP * next_op; |
158 | OP * last_op; |
159 | SV ** itervar; |
160 | SV * itersave; |
5f05dabc |
161 | SV * iterlval; |
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162 | AV * iterary; |
89ea2908 |
163 | IV iterix; |
164 | IV itermax; |
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165 | }; |
166 | |
167 | #define PUSHLOOP(cx, ivar, s) \ |
38a230cb |
168 | cx->blk_loop.label = PL_curcop->cop_label; \ |
169 | cx->blk_loop.resetsp = s - PL_stack_base; \ |
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170 | cx->blk_loop.redo_op = cLOOP->op_redoop; \ |
171 | cx->blk_loop.next_op = cLOOP->op_nextop; \ |
172 | cx->blk_loop.last_op = cLOOP->op_lastop; \ |
7a4c00b4 |
173 | if (cx->blk_loop.itervar = (ivar)) \ |
44a8e56a |
174 | cx->blk_loop.itersave = SvREFCNT_inc(*cx->blk_loop.itervar);\ |
175 | cx->blk_loop.iterlval = Nullsv; \ |
176 | cx->blk_loop.iterary = Nullav; \ |
177 | cx->blk_loop.iterix = -1; |
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178 | |
179 | #define POPLOOP(cx) \ |
a8bba7fa |
180 | SvREFCNT_dec(cx->blk_loop.iterlval); \ |
181 | if (cx->blk_loop.itervar) { \ |
182 | sv_2mortal(*(cx->blk_loop.itervar)); \ |
183 | *(cx->blk_loop.itervar) = cx->blk_loop.itersave; \ |
44a8e56a |
184 | } \ |
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185 | if (cx->blk_loop.iterary && cx->blk_loop.iterary != PL_curstack)\ |
186 | SvREFCNT_dec(cx->blk_loop.iterary); |
79072805 |
187 | |
188 | /* context common to subroutines, evals and loops */ |
189 | struct block { |
190 | I32 blku_oldsp; /* stack pointer to copy stuff down to */ |
191 | COP * blku_oldcop; /* old curcop pointer */ |
192 | I32 blku_oldretsp; /* return stack index */ |
193 | I32 blku_oldmarksp; /* mark stack index */ |
194 | I32 blku_oldscopesp; /* scope stack index */ |
195 | PMOP * blku_oldpm; /* values of pattern match vars */ |
196 | U8 blku_gimme; /* is this block running in list context? */ |
197 | |
198 | union { |
199 | struct block_sub blku_sub; |
200 | struct block_eval blku_eval; |
201 | struct block_loop blku_loop; |
202 | } blk_u; |
203 | }; |
204 | #define blk_oldsp cx_u.cx_blk.blku_oldsp |
205 | #define blk_oldcop cx_u.cx_blk.blku_oldcop |
206 | #define blk_oldretsp cx_u.cx_blk.blku_oldretsp |
207 | #define blk_oldmarksp cx_u.cx_blk.blku_oldmarksp |
208 | #define blk_oldscopesp cx_u.cx_blk.blku_oldscopesp |
209 | #define blk_oldpm cx_u.cx_blk.blku_oldpm |
210 | #define blk_gimme cx_u.cx_blk.blku_gimme |
211 | #define blk_sub cx_u.cx_blk.blk_u.blku_sub |
212 | #define blk_eval cx_u.cx_blk.blk_u.blku_eval |
213 | #define blk_loop cx_u.cx_blk.blk_u.blku_loop |
214 | |
215 | /* Enter a block. */ |
8990e307 |
216 | #define PUSHBLOCK(cx,t,sp) CXINC, cx = &cxstack[cxstack_ix], \ |
79072805 |
217 | cx->cx_type = t, \ |
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218 | cx->blk_oldsp = sp - PL_stack_base, \ |
219 | cx->blk_oldcop = PL_curcop, \ |
1aff0e91 |
220 | cx->blk_oldmarksp = PL_markstack_ptr - PL_markstack, \ |
3280af22 |
221 | cx->blk_oldscopesp = PL_scopestack_ix, \ |
1aff0e91 |
222 | cx->blk_oldretsp = PL_retstack_ix, \ |
3280af22 |
223 | cx->blk_oldpm = PL_curpm, \ |
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224 | cx->blk_gimme = gimme; \ |
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225 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Entering block %ld, type %s\n", \ |
1aff0e91 |
226 | (long)cxstack_ix, PL_block_type[CxTYPE(cx)]); ) |
79072805 |
227 | |
228 | /* Exit a block (RETURN and LAST). */ |
a0d0e21e |
229 | #define POPBLOCK(cx,pm) cx = &cxstack[cxstack_ix--], \ |
1aff0e91 |
230 | newsp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 |
231 | PL_curcop = cx->blk_oldcop, \ |
232 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
233 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
234 | PL_retstack_ix = cx->blk_oldretsp, \ |
235 | pm = cx->blk_oldpm, \ |
236 | gimme = cx->blk_gimme; \ |
bf49b057 |
237 | DEBUG_l( PerlIO_printf(Perl_debug_log, "Leaving block %ld, type %s\n", \ |
22c35a8c |
238 | (long)cxstack_ix+1,PL_block_type[CxTYPE(cx)]); ) |
79072805 |
239 | |
240 | /* Continue a block elsewhere (NEXT and REDO). */ |
3280af22 |
241 | #define TOPBLOCK(cx) cx = &cxstack[cxstack_ix], \ |
1aff0e91 |
242 | PL_stack_sp = PL_stack_base + cx->blk_oldsp, \ |
3280af22 |
243 | PL_markstack_ptr = PL_markstack + cx->blk_oldmarksp, \ |
244 | PL_scopestack_ix = cx->blk_oldscopesp, \ |
2158dd9b |
245 | PL_retstack_ix = cx->blk_oldretsp, \ |
246 | PL_curpm = cx->blk_oldpm |
79072805 |
247 | |
248 | /* substitution context */ |
249 | struct subst { |
250 | I32 sbu_iters; |
251 | I32 sbu_maxiters; |
22e551b9 |
252 | I32 sbu_rflags; |
4633a7c4 |
253 | I32 sbu_oldsave; |
71be2cbc |
254 | bool sbu_once; |
255 | bool sbu_rxtainted; |
79072805 |
256 | char * sbu_orig; |
257 | SV * sbu_dstr; |
258 | SV * sbu_targ; |
259 | char * sbu_s; |
260 | char * sbu_m; |
261 | char * sbu_strend; |
c90c0ff4 |
262 | void * sbu_rxres; |
c07a80fd |
263 | REGEXP * sbu_rx; |
79072805 |
264 | }; |
265 | #define sb_iters cx_u.cx_subst.sbu_iters |
266 | #define sb_maxiters cx_u.cx_subst.sbu_maxiters |
22e551b9 |
267 | #define sb_rflags cx_u.cx_subst.sbu_rflags |
4633a7c4 |
268 | #define sb_oldsave cx_u.cx_subst.sbu_oldsave |
71be2cbc |
269 | #define sb_once cx_u.cx_subst.sbu_once |
270 | #define sb_rxtainted cx_u.cx_subst.sbu_rxtainted |
79072805 |
271 | #define sb_orig cx_u.cx_subst.sbu_orig |
272 | #define sb_dstr cx_u.cx_subst.sbu_dstr |
273 | #define sb_targ cx_u.cx_subst.sbu_targ |
274 | #define sb_s cx_u.cx_subst.sbu_s |
275 | #define sb_m cx_u.cx_subst.sbu_m |
276 | #define sb_strend cx_u.cx_subst.sbu_strend |
c90c0ff4 |
277 | #define sb_rxres cx_u.cx_subst.sbu_rxres |
c07a80fd |
278 | #define sb_rx cx_u.cx_subst.sbu_rx |
79072805 |
279 | |
280 | #define PUSHSUBST(cx) CXINC, cx = &cxstack[cxstack_ix], \ |
281 | cx->sb_iters = iters, \ |
282 | cx->sb_maxiters = maxiters, \ |
22e551b9 |
283 | cx->sb_rflags = r_flags, \ |
4633a7c4 |
284 | cx->sb_oldsave = oldsave, \ |
71be2cbc |
285 | cx->sb_once = once, \ |
286 | cx->sb_rxtainted = rxtainted, \ |
79072805 |
287 | cx->sb_orig = orig, \ |
288 | cx->sb_dstr = dstr, \ |
289 | cx->sb_targ = targ, \ |
290 | cx->sb_s = s, \ |
291 | cx->sb_m = m, \ |
292 | cx->sb_strend = strend, \ |
c90c0ff4 |
293 | cx->sb_rxres = Null(void*), \ |
c07a80fd |
294 | cx->sb_rx = rx, \ |
c90c0ff4 |
295 | cx->cx_type = CXt_SUBST; \ |
296 | rxres_save(&cx->sb_rxres, rx) |
79072805 |
297 | |
c90c0ff4 |
298 | #define POPSUBST(cx) cx = &cxstack[cxstack_ix--]; \ |
299 | rxres_free(&cx->sb_rxres) |
79072805 |
300 | |
301 | struct context { |
6b35e009 |
302 | U32 cx_type; /* what kind of context this is */ |
79072805 |
303 | union { |
304 | struct block cx_blk; |
305 | struct subst cx_subst; |
306 | } cx_u; |
307 | }; |
6b35e009 |
308 | |
309 | #define CXTYPEMASK 0xff |
79072805 |
310 | #define CXt_NULL 0 |
311 | #define CXt_SUB 1 |
312 | #define CXt_EVAL 2 |
313 | #define CXt_LOOP 3 |
314 | #define CXt_SUBST 4 |
315 | #define CXt_BLOCK 5 |
316 | |
6b35e009 |
317 | /* private flags for CXt_EVAL */ |
318 | #define CXp_REAL 0x00000100 /* truly eval'', not a lookalike */ |
319 | |
320 | #define CxTYPE(c) ((c)->cx_type & CXTYPEMASK) |
321 | #define CxREALEVAL(c) (((c)->cx_type & (CXt_EVAL|CXp_REAL)) == (CXt_EVAL|CXp_REAL)) |
322 | |
79072805 |
323 | #define CXINC (cxstack_ix < cxstack_max ? ++cxstack_ix : (cxstack_ix = cxinc())) |
324 | |
325 | /* "gimme" values */ |
a0d0e21e |
326 | #define G_SCALAR 0 |
327 | #define G_ARRAY 1 |
54310121 |
328 | #define G_VOID 128 /* skip this bit when adding flags below */ |
79072805 |
329 | |
864dbfa3 |
330 | /* extra flags for Perl_call_* routines */ |
a0d0e21e |
331 | #define G_DISCARD 2 /* Call FREETMPS. */ |
332 | #define G_EVAL 4 /* Assume eval {} around subroutine call. */ |
333 | #define G_NOARGS 8 /* Don't construct a @_ array. */ |
54310121 |
334 | #define G_KEEPERR 16 /* Append errors to $@, don't overwrite it */ |
491527d0 |
335 | #define G_NODEBUG 32 /* Disable debugging at toplevel. */ |
e336de0d |
336 | |
faef0170 |
337 | /* flag bits for PL_in_eval */ |
338 | #define EVAL_NULL 0 /* not in an eval */ |
339 | #define EVAL_INEVAL 1 /* some enclosing scope is an eval */ |
340 | #define EVAL_WARNONLY 2 /* used by yywarn() when calling yyerror() */ |
864dbfa3 |
341 | #define EVAL_KEEPERR 4 /* set by Perl_call_sv if G_KEEPERR */ |
faef0170 |
342 | |
e336de0d |
343 | /* Support for switching (stack and block) contexts. |
344 | * This ensures magic doesn't invalidate local stack and cx pointers. |
345 | */ |
346 | |
e788e7d3 |
347 | #define PERLSI_UNKNOWN -1 |
348 | #define PERLSI_UNDEF 0 |
349 | #define PERLSI_MAIN 1 |
350 | #define PERLSI_MAGIC 2 |
351 | #define PERLSI_SORT 3 |
352 | #define PERLSI_SIGNAL 4 |
353 | #define PERLSI_OVERLOAD 5 |
354 | #define PERLSI_DESTROY 6 |
355 | #define PERLSI_WARNHOOK 7 |
356 | #define PERLSI_DIEHOOK 8 |
357 | #define PERLSI_REQUIRE 9 |
e336de0d |
358 | |
359 | struct stackinfo { |
360 | AV * si_stack; /* stack for current runlevel */ |
361 | PERL_CONTEXT * si_cxstack; /* context stack for runlevel */ |
362 | I32 si_cxix; /* current context index */ |
363 | I32 si_cxmax; /* maximum allocated index */ |
364 | I32 si_type; /* type of runlevel */ |
365 | struct stackinfo * si_prev; |
366 | struct stackinfo * si_next; |
367 | I32 * si_markbase; /* where markstack begins for us. |
368 | * currently used only with DEBUGGING, |
369 | * but not #ifdef-ed for bincompat */ |
370 | }; |
371 | |
372 | typedef struct stackinfo PERL_SI; |
373 | |
3280af22 |
374 | #define cxstack (PL_curstackinfo->si_cxstack) |
375 | #define cxstack_ix (PL_curstackinfo->si_cxix) |
376 | #define cxstack_max (PL_curstackinfo->si_cxmax) |
e336de0d |
377 | |
378 | #ifdef DEBUGGING |
3280af22 |
379 | # define SET_MARKBASE PL_curstackinfo->si_markbase = PL_markstack_ptr |
e336de0d |
380 | #else |
381 | # define SET_MARKBASE NOOP |
382 | #endif |
383 | |
d3acc0f7 |
384 | #define PUSHSTACKi(type) \ |
e336de0d |
385 | STMT_START { \ |
3280af22 |
386 | PERL_SI *next = PL_curstackinfo->si_next; \ |
e336de0d |
387 | if (!next) { \ |
388 | next = new_stackinfo(32, 2048/sizeof(PERL_CONTEXT) - 1); \ |
3280af22 |
389 | next->si_prev = PL_curstackinfo; \ |
390 | PL_curstackinfo->si_next = next; \ |
e336de0d |
391 | } \ |
392 | next->si_type = type; \ |
393 | next->si_cxix = -1; \ |
394 | AvFILLp(next->si_stack) = 0; \ |
3280af22 |
395 | SWITCHSTACK(PL_curstack,next->si_stack); \ |
396 | PL_curstackinfo = next; \ |
e336de0d |
397 | SET_MARKBASE; \ |
398 | } STMT_END |
399 | |
e788e7d3 |
400 | #define PUSHSTACK PUSHSTACKi(PERLSI_UNKNOWN) |
d3acc0f7 |
401 | |
3095d977 |
402 | /* POPSTACK works with PL_stack_sp, so it may need to be bracketed by |
403 | * PUTBACK/SPAGAIN to flush/refresh any local SP that may be active */ |
d3acc0f7 |
404 | #define POPSTACK \ |
e336de0d |
405 | STMT_START { \ |
de616352 |
406 | djSP; \ |
3280af22 |
407 | PERL_SI *prev = PL_curstackinfo->si_prev; \ |
e336de0d |
408 | if (!prev) { \ |
bf49b057 |
409 | PerlIO_printf(Perl_error_log, "panic: POPSTACK\n"); \ |
e336de0d |
410 | my_exit(1); \ |
411 | } \ |
3280af22 |
412 | SWITCHSTACK(PL_curstack,prev->si_stack); \ |
e336de0d |
413 | /* don't free prev here, free them all at the END{} */ \ |
3280af22 |
414 | PL_curstackinfo = prev; \ |
e336de0d |
415 | } STMT_END |
416 | |
417 | #define POPSTACK_TO(s) \ |
418 | STMT_START { \ |
3280af22 |
419 | while (PL_curstack != s) { \ |
bac4b2ad |
420 | dounwind(-1); \ |
d3acc0f7 |
421 | POPSTACK; \ |
bac4b2ad |
422 | } \ |
e336de0d |
423 | } STMT_END |