1 | /* deb.c |
---|
2 | * |
---|
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998, 1999, |
---|
4 | * 2000, 2001, 2002, by Larry Wall and others |
---|
5 | * |
---|
6 | * You may distribute under the terms of either the GNU General Public |
---|
7 | * License or the Artistic License, as specified in the README file. |
---|
8 | * |
---|
9 | */ |
---|
10 | |
---|
11 | /* |
---|
12 | * "Didst thou think that the eyes of the White Tower were blind? Nay, I |
---|
13 | * have seen more than thou knowest, Gray Fool." --Denethor |
---|
14 | */ |
---|
15 | |
---|
16 | #include "EXTERN.h" |
---|
17 | #define PERL_IN_DEB_C |
---|
18 | #include "perl.h" |
---|
19 | |
---|
20 | #if defined(PERL_IMPLICIT_CONTEXT) |
---|
21 | void |
---|
22 | Perl_deb_nocontext(const char *pat, ...) |
---|
23 | { |
---|
24 | #ifdef DEBUGGING |
---|
25 | dTHX; |
---|
26 | va_list args; |
---|
27 | va_start(args, pat); |
---|
28 | vdeb(pat, &args); |
---|
29 | va_end(args); |
---|
30 | #endif /* DEBUGGING */ |
---|
31 | } |
---|
32 | #endif |
---|
33 | |
---|
34 | void |
---|
35 | Perl_deb(pTHX_ const char *pat, ...) |
---|
36 | { |
---|
37 | #ifdef DEBUGGING |
---|
38 | va_list args; |
---|
39 | va_start(args, pat); |
---|
40 | vdeb(pat, &args); |
---|
41 | va_end(args); |
---|
42 | #endif /* DEBUGGING */ |
---|
43 | } |
---|
44 | |
---|
45 | void |
---|
46 | Perl_vdeb(pTHX_ const char *pat, va_list *args) |
---|
47 | { |
---|
48 | #ifdef DEBUGGING |
---|
49 | char* file = OutCopFILE(PL_curcop); |
---|
50 | |
---|
51 | #ifdef USE_5005THREADS |
---|
52 | PerlIO_printf(Perl_debug_log, "0x%"UVxf" (%s:%ld)\t", |
---|
53 | PTR2UV(thr), |
---|
54 | (file ? file : "<free>"), |
---|
55 | (long)CopLINE(PL_curcop)); |
---|
56 | #else |
---|
57 | PerlIO_printf(Perl_debug_log, "(%s:%ld)\t", (file ? file : "<free>"), |
---|
58 | (long)CopLINE(PL_curcop)); |
---|
59 | #endif /* USE_5005THREADS */ |
---|
60 | (void) PerlIO_vprintf(Perl_debug_log, pat, *args); |
---|
61 | #endif /* DEBUGGING */ |
---|
62 | } |
---|
63 | |
---|
64 | I32 |
---|
65 | Perl_debstackptrs(pTHX) |
---|
66 | { |
---|
67 | #ifdef DEBUGGING |
---|
68 | PerlIO_printf(Perl_debug_log, |
---|
69 | "%8"UVxf" %8"UVxf" %8"IVdf" %8"IVdf" %8"IVdf"\n", |
---|
70 | PTR2UV(PL_curstack), PTR2UV(PL_stack_base), |
---|
71 | (IV)*PL_markstack_ptr, (IV)(PL_stack_sp-PL_stack_base), |
---|
72 | (IV)(PL_stack_max-PL_stack_base)); |
---|
73 | PerlIO_printf(Perl_debug_log, |
---|
74 | "%8"UVxf" %8"UVxf" %8"UVuf" %8"UVuf" %8"UVuf"\n", |
---|
75 | PTR2UV(PL_mainstack), PTR2UV(AvARRAY(PL_curstack)), |
---|
76 | PTR2UV(PL_mainstack), PTR2UV(AvFILLp(PL_curstack)), |
---|
77 | PTR2UV(AvMAX(PL_curstack))); |
---|
78 | #endif /* DEBUGGING */ |
---|
79 | return 0; |
---|
80 | } |
---|
81 | |
---|
82 | |
---|
83 | /* dump the contents of a particular stack |
---|
84 | * Display stack_base[stack_min+1 .. stack_max], |
---|
85 | * and display the marks whose offsets are contained in addresses |
---|
86 | * PL_markstack[mark_min+1 .. mark_max] and whose values are in the range |
---|
87 | * of the stack values being displayed |
---|
88 | * |
---|
89 | * Only displays top 30 max |
---|
90 | */ |
---|
91 | |
---|
92 | STATIC void |
---|
93 | S_deb_stack_n(pTHX_ SV** stack_base, I32 stack_min, I32 stack_max, |
---|
94 | I32 mark_min, I32 mark_max) |
---|
95 | { |
---|
96 | #ifdef DEBUGGING |
---|
97 | register I32 i = stack_max - 30; |
---|
98 | I32 *markscan = PL_markstack + mark_min; |
---|
99 | if (i < stack_min) |
---|
100 | i = stack_min; |
---|
101 | |
---|
102 | while (++markscan <= PL_markstack + mark_max) |
---|
103 | if (*markscan >= i) |
---|
104 | break; |
---|
105 | |
---|
106 | if (i > stack_min) |
---|
107 | PerlIO_printf(Perl_debug_log, "... "); |
---|
108 | |
---|
109 | if (stack_base[0] != &PL_sv_undef || stack_max < 0) |
---|
110 | PerlIO_printf(Perl_debug_log, " [STACK UNDERFLOW!!!]\n"); |
---|
111 | do { |
---|
112 | ++i; |
---|
113 | if (markscan <= PL_markstack + mark_max && *markscan < i) { |
---|
114 | do { |
---|
115 | ++markscan; |
---|
116 | PerlIO_putc(Perl_debug_log, '*'); |
---|
117 | } |
---|
118 | while (markscan <= PL_markstack + mark_max && *markscan < i); |
---|
119 | PerlIO_printf(Perl_debug_log, " "); |
---|
120 | } |
---|
121 | if (i > stack_max) |
---|
122 | break; |
---|
123 | PerlIO_printf(Perl_debug_log, "%-4s ", SvPEEK(stack_base[i])); |
---|
124 | } |
---|
125 | while (1); |
---|
126 | PerlIO_printf(Perl_debug_log, "\n"); |
---|
127 | #endif /* DEBUGGING */ |
---|
128 | } |
---|
129 | |
---|
130 | |
---|
131 | /* dump the current stack */ |
---|
132 | |
---|
133 | I32 |
---|
134 | Perl_debstack(pTHX) |
---|
135 | { |
---|
136 | #ifndef SKIP_DEBUGGING |
---|
137 | if (CopSTASH_eq(PL_curcop, PL_debstash) && !DEBUG_J_TEST_) |
---|
138 | return 0; |
---|
139 | |
---|
140 | PerlIO_printf(Perl_debug_log, " => "); |
---|
141 | deb_stack_n(PL_stack_base, |
---|
142 | 0, |
---|
143 | PL_stack_sp - PL_stack_base, |
---|
144 | PL_curstackinfo->si_markoff, |
---|
145 | PL_markstack_ptr - PL_markstack); |
---|
146 | |
---|
147 | |
---|
148 | #endif /* SKIP_DEBUGGING */ |
---|
149 | return 0; |
---|
150 | } |
---|
151 | |
---|
152 | |
---|
153 | #ifdef DEBUGGING |
---|
154 | static char * si_names[] = { |
---|
155 | "UNKNOWN", |
---|
156 | "UNDEF", |
---|
157 | "MAIN", |
---|
158 | "MAGIC", |
---|
159 | "SORT", |
---|
160 | "SIGNAL", |
---|
161 | "OVERLOAD", |
---|
162 | "DESTROY", |
---|
163 | "WARNHOOK", |
---|
164 | "DIEHOOK", |
---|
165 | "REQUIRE" |
---|
166 | }; |
---|
167 | #endif |
---|
168 | |
---|
169 | /* display all stacks */ |
---|
170 | |
---|
171 | |
---|
172 | void |
---|
173 | Perl_deb_stack_all(pTHX) |
---|
174 | { |
---|
175 | #ifdef DEBUGGING |
---|
176 | I32 ix, si_ix; |
---|
177 | PERL_SI *si; |
---|
178 | PERL_CONTEXT *cx; |
---|
179 | |
---|
180 | /* rewind to start of chain */ |
---|
181 | si = PL_curstackinfo; |
---|
182 | while (si->si_prev) |
---|
183 | si = si->si_prev; |
---|
184 | |
---|
185 | si_ix=0; |
---|
186 | for (;;) |
---|
187 | { |
---|
188 | char *si_name; |
---|
189 | int si_name_ix = si->si_type+1; /* -1 is a valid index */ |
---|
190 | if (si_name_ix>= sizeof(si_names)) |
---|
191 | si_name = "????"; |
---|
192 | else |
---|
193 | si_name = si_names[si_name_ix]; |
---|
194 | PerlIO_printf(Perl_debug_log, "STACK %"IVdf": %s\n", |
---|
195 | (IV)si_ix, si_name); |
---|
196 | |
---|
197 | for (ix=0; ix<=si->si_cxix; ix++) { |
---|
198 | |
---|
199 | cx = &(si->si_cxstack[ix]); |
---|
200 | PerlIO_printf(Perl_debug_log, |
---|
201 | " CX %"IVdf": %-6s => ", |
---|
202 | (IV)ix, PL_block_type[CxTYPE(cx)] |
---|
203 | ); |
---|
204 | /* substitution contexts don't save stack pointers etc) */ |
---|
205 | if (CxTYPE(cx) == CXt_SUBST) |
---|
206 | PerlIO_printf(Perl_debug_log, "\n"); |
---|
207 | else { |
---|
208 | |
---|
209 | /* Find the the current context's stack range by searching |
---|
210 | * forward for any higher contexts using this stack; failing |
---|
211 | * that, it will be equal to the size of the stack for old |
---|
212 | * stacks, or PL_stack_sp for the current stack |
---|
213 | */ |
---|
214 | |
---|
215 | I32 i, stack_min, stack_max, mark_min, mark_max; |
---|
216 | I32 ret_min, ret_max; |
---|
217 | PERL_CONTEXT *cx_n; |
---|
218 | PERL_SI *si_n; |
---|
219 | |
---|
220 | cx_n = Null(PERL_CONTEXT*); |
---|
221 | |
---|
222 | /* there's a separate stack per SI, so only search |
---|
223 | * this one */ |
---|
224 | |
---|
225 | for (i=ix+1; i<=si->si_cxix; i++) { |
---|
226 | if (CxTYPE(cx) == CXt_SUBST) |
---|
227 | continue; |
---|
228 | cx_n = &(si->si_cxstack[i]); |
---|
229 | break; |
---|
230 | } |
---|
231 | |
---|
232 | stack_min = cx->blk_oldsp; |
---|
233 | |
---|
234 | if (cx_n) { |
---|
235 | stack_max = cx_n->blk_oldsp; |
---|
236 | } |
---|
237 | else if (si == PL_curstackinfo) { |
---|
238 | stack_max = PL_stack_sp - AvARRAY(si->si_stack); |
---|
239 | } |
---|
240 | else { |
---|
241 | stack_max = AvFILLp(si->si_stack); |
---|
242 | } |
---|
243 | |
---|
244 | /* for the other stack types, there's only one stack |
---|
245 | * shared between all SIs */ |
---|
246 | |
---|
247 | si_n = si; |
---|
248 | i = ix; |
---|
249 | cx_n = Null(PERL_CONTEXT*); |
---|
250 | for (;;) { |
---|
251 | i++; |
---|
252 | if (i > si_n->si_cxix) { |
---|
253 | if (si_n == PL_curstackinfo) |
---|
254 | break; |
---|
255 | else { |
---|
256 | si_n = si_n->si_next; |
---|
257 | i = 0; |
---|
258 | } |
---|
259 | } |
---|
260 | if (CxTYPE(&(si_n->si_cxstack[i])) == CXt_SUBST) |
---|
261 | continue; |
---|
262 | cx_n = &(si_n->si_cxstack[i]); |
---|
263 | break; |
---|
264 | } |
---|
265 | |
---|
266 | mark_min = cx->blk_oldmarksp; |
---|
267 | ret_min = cx->blk_oldretsp; |
---|
268 | if (cx_n) { |
---|
269 | mark_max = cx_n->blk_oldmarksp; |
---|
270 | ret_max = cx_n->blk_oldretsp; |
---|
271 | } |
---|
272 | else { |
---|
273 | mark_max = PL_markstack_ptr - PL_markstack; |
---|
274 | ret_max = PL_retstack_ix; |
---|
275 | } |
---|
276 | |
---|
277 | deb_stack_n(AvARRAY(si->si_stack), |
---|
278 | stack_min, stack_max, mark_min, mark_max); |
---|
279 | |
---|
280 | if (ret_max > ret_min) { |
---|
281 | PerlIO_printf(Perl_debug_log, " retop=%s\n", |
---|
282 | PL_retstack[ret_min] |
---|
283 | ? OP_NAME(PL_retstack[ret_min]) |
---|
284 | : "(null)" |
---|
285 | ); |
---|
286 | } |
---|
287 | |
---|
288 | } |
---|
289 | } /* next context */ |
---|
290 | |
---|
291 | |
---|
292 | if (si == PL_curstackinfo) |
---|
293 | break; |
---|
294 | si = si->si_next; |
---|
295 | si_ix++; |
---|
296 | if (!si) |
---|
297 | break; /* shouldn't happen, but just in case.. */ |
---|
298 | } /* next stackinfo */ |
---|
299 | |
---|
300 | PerlIO_printf(Perl_debug_log, "\n"); |
---|
301 | #endif /* DEBUGGING */ |
---|
302 | } |
---|
303 | |
---|
304 | |
---|