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1 | package DB; |
2 | |
f0fcb552 |
3 | # modified Perl debugger, to be run from Emacs in perldb-mode |
4 | # Ray Lischner (uunet!mntgfx!lisch) as of 5 Nov 1990 |
5 | # Johan Vromans -- upgrade to 4.0 pl 10 |
6 | |
7 | $header = '$RCSfile: perldb.pl,v $$Revision: 4.0.1.2 $$Date: 91/11/05 17:55:58 $'; |
a687059c |
8 | # |
9 | # This file is automatically included if you do perl -d. |
10 | # It's probably not useful to include this yourself. |
11 | # |
12 | # Perl supplies the values for @line and %sub. It effectively inserts |
13 | # a do DB'DB(<linenum>); in front of every place that can |
14 | # have a breakpoint. It also inserts a do 'perldb.pl' before the first line. |
15 | # |
16 | # $Log: perldb.pl,v $ |
f0fcb552 |
17 | # Revision 4.0.1.2 91/11/05 17:55:58 lwall |
18 | # patch11: perldb.pl modified to run within emacs in perldb-mode |
19 | # |
9ef589d8 |
20 | # Revision 4.0.1.1 91/06/07 11:17:44 lwall |
21 | # patch4: added $^P variable to control calling of perldb routines |
22 | # patch4: debugger sometimes listed wrong number of lines for a statement |
23 | # |
fe14fcc3 |
24 | # Revision 4.0 91/03/20 01:25:50 lwall |
25 | # 4.0 baseline. |
26 | # |
27e2fb84 |
27 | # Revision 3.0.1.6 91/01/11 18:08:58 lwall |
28 | # patch42: @_ couldn't be accessed from debugger |
29 | # |
34de22dd |
30 | # Revision 3.0.1.5 90/11/10 01:40:26 lwall |
31 | # patch38: the debugger wouldn't stop correctly or do action routines |
32 | # |
76854fea |
33 | # Revision 3.0.1.4 90/10/15 17:40:38 lwall |
34 | # patch29: added caller |
35 | # patch29: the debugger now understands packages and evals |
36 | # patch29: scripts now run at almost full speed under the debugger |
37 | # patch29: more variables are settable from debugger |
38 | # |
33b78306 |
39 | # Revision 3.0.1.3 90/08/09 04:00:58 lwall |
40 | # patch19: debugger now allows continuation lines |
41 | # patch19: debugger can now dump lists of variables |
42 | # patch19: debugger can now add aliases easily from prompt |
43 | # |
79a0689e |
44 | # Revision 3.0.1.2 90/03/12 16:39:39 lwall |
45 | # patch13: perl -d didn't format stack traces of *foo right |
46 | # patch13: perl -d wiped out scalar return values of subroutines |
47 | # |
03a14243 |
48 | # Revision 3.0.1.1 89/10/26 23:14:02 lwall |
49 | # patch1: RCS expanded an unintended $Header in lib/perldb.pl |
50 | # |
a687059c |
51 | # Revision 3.0 89/10/18 15:19:46 lwall |
52 | # 3.0 baseline |
53 | # |
54 | # Revision 2.0 88/06/05 00:09:45 root |
55 | # Baseline version 2.0. |
56 | # |
57 | # |
58 | |
76854fea |
59 | open(IN, "</dev/tty") || open(IN, "<&STDIN"); # so we don't dingle stdin |
60 | open(OUT,">/dev/tty") || open(OUT, ">&STDOUT"); # so we don't dongle stdout |
a687059c |
61 | select(OUT); |
62 | $| = 1; # for DB'OUT |
63 | select(STDOUT); |
64 | $| = 1; # for real STDOUT |
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65 | $sub = ''; |
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66 | |
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67 | # Is Perl being run from Emacs? |
68 | $emacs = $main'ARGV[$[] eq '-emacs'; |
69 | shift(@main'ARGV) if $emacs; |
70 | |
03a14243 |
71 | $header =~ s/.Header: ([^,]+),v(\s+\S+\s+\S+).*$/$1$2/; |
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72 | print OUT "\nLoading DB routines from $header\n"; |
73 | print OUT ("Emacs support ", |
74 | $emacs ? "enabled" : "available", |
75 | ".\n"); |
76 | print OUT "\nEnter h for help.\n\n"; |
a687059c |
77 | |
78 | sub DB { |
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79 | &save; |
80 | ($package, $filename, $line) = caller; |
81 | $usercontext = '($@, $!, $[, $,, $/, $\) = @saved;' . |
82 | "package $package;"; # this won't let them modify, alas |
9ef589d8 |
83 | local($^P) = 0; # don't debug our own evals |
76854fea |
84 | local(*dbline) = "_<$filename"; |
85 | $max = $#dbline; |
86 | if (($stop,$action) = split(/\0/,$dbline{$line})) { |
a687059c |
87 | if ($stop eq '1') { |
88 | $signal |= 1; |
89 | } |
90 | else { |
27e2fb84 |
91 | $evalarg = "\$DB'signal |= do {$stop;}"; &eval; |
76854fea |
92 | $dbline{$line} =~ s/;9($|\0)/$1/; |
a687059c |
93 | } |
94 | } |
95 | if ($single || $trace || $signal) { |
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96 | if ($emacs) { |
97 | print OUT "\032\032$filename:$line:0\n"; |
98 | } else { |
99 | print OUT "$package'" unless $sub =~ /'/; |
100 | print OUT "$sub($filename:$line):\t",$dbline[$line]; |
101 | for ($i = $line + 1; $i <= $max && $dbline[$i] == 0; ++$i) { |
102 | last if $dbline[$i] =~ /^\s*(}|#|\n)/; |
103 | print OUT "$sub($filename:$i):\t",$dbline[$i]; |
104 | } |
a687059c |
105 | } |
106 | } |
27e2fb84 |
107 | $evalarg = $action, &eval if $action; |
a687059c |
108 | if ($single || $signal) { |
27e2fb84 |
109 | $evalarg = $pre, &eval if $pre; |
a687059c |
110 | print OUT $#stack . " levels deep in subroutine calls!\n" |
111 | if $single & 4; |
112 | $start = $line; |
fe14fcc3 |
113 | CMD: |
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114 | while ((print OUT " DB<", $#hist+1, "> "), $cmd=&gets) { |
fe14fcc3 |
115 | { |
116 | $single = 0; |
117 | $signal = 0; |
118 | $cmd eq '' && exit 0; |
119 | chop($cmd); |
120 | $cmd =~ s/\\$// && do { |
121 | print OUT " cont: "; |
122 | $cmd .= &gets; |
123 | redo CMD; |
124 | }; |
125 | $cmd =~ /^q$/ && exit 0; |
126 | $cmd =~ /^$/ && ($cmd = $laststep); |
127 | push(@hist,$cmd) if length($cmd) > 1; |
128 | ($i) = split(/\s+/,$cmd); |
129 | eval "\$cmd =~ $alias{$i}", print OUT $@ if $alias{$i}; |
130 | $cmd =~ /^h$/ && do { |
131 | print OUT " |
a687059c |
132 | T Stack trace. |
133 | s Single step. |
134 | n Next, steps over subroutine calls. |
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135 | r Return from current subroutine. |
a687059c |
136 | c [line] Continue; optionally inserts a one-time-only breakpoint |
137 | at the specified line. |
138 | <CR> Repeat last n or s. |
139 | l min+incr List incr+1 lines starting at min. |
140 | l min-max List lines. |
141 | l line List line; |
142 | l List next window. |
143 | - List previous window. |
144 | w line List window around line. |
145 | l subname List subroutine. |
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146 | f filename Switch to filename. |
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147 | /pattern/ Search forwards for pattern; final / is optional. |
148 | ?pattern? Search backwards for pattern. |
149 | L List breakpoints and actions. |
150 | S List subroutine names. |
151 | t Toggle trace mode. |
152 | b [line] [condition] |
153 | Set breakpoint; line defaults to the current execution line; |
154 | condition breaks if it evaluates to true, defaults to \'1\'. |
155 | b subname [condition] |
156 | Set breakpoint at first line of subroutine. |
157 | d [line] Delete breakpoint. |
158 | D Delete all breakpoints. |
159 | a [line] command |
160 | Set an action to be done before the line is executed. |
161 | Sequence is: check for breakpoint, print line if necessary, |
162 | do action, prompt user if breakpoint or step, evaluate line. |
163 | A Delete all actions. |
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164 | V [pkg [vars]] List some (default all) variables in package (default current). |
165 | X [vars] Same as \"V currentpackage [vars]\". |
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166 | < command Define command before prompt. |
167 | > command Define command after prompt. |
168 | ! number Redo command (default previous command). |
169 | ! -number Redo number\'th to last command. |
170 | H -number Display last number commands (default all). |
171 | q or ^D Quit. |
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172 | p expr Same as \"print DB'OUT expr\" in current package. |
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173 | = [alias value] Define a command alias, or list current aliases. |
76854fea |
174 | command Execute as a perl statement in current package. |
a687059c |
175 | |
176 | "; |
fe14fcc3 |
177 | next CMD; }; |
178 | $cmd =~ /^t$/ && do { |
179 | $trace = !$trace; |
180 | print OUT "Trace = ".($trace?"on":"off")."\n"; |
181 | next CMD; }; |
182 | $cmd =~ /^S$/ && do { |
183 | foreach $subname (sort(keys %sub)) { |
184 | print OUT $subname,"\n"; |
185 | } |
186 | next CMD; }; |
187 | $cmd =~ s/^X\b/V $package/; |
188 | $cmd =~ /^V$/ && do { |
189 | $cmd = 'V $package'; }; |
190 | $cmd =~ /^V\b\s*(\S+)\s*(.*)/ && do { |
191 | $packname = $1; |
192 | @vars = split(' ',$2); |
193 | do 'dumpvar.pl' unless defined &main'dumpvar; |
194 | if (defined &main'dumpvar) { |
195 | &main'dumpvar($packname,@vars); |
196 | } |
197 | else { |
198 | print DB'OUT "dumpvar.pl not available.\n"; |
76854fea |
199 | } |
fe14fcc3 |
200 | next CMD; }; |
201 | $cmd =~ /^f\b\s*(.*)/ && do { |
202 | $file = $1; |
203 | if (!$file) { |
204 | print OUT "The old f command is now the r command.\n"; |
205 | print OUT "The new f command switches filenames.\n"; |
206 | next CMD; |
a687059c |
207 | } |
fe14fcc3 |
208 | if (!defined $_main{'_<' . $file}) { |
209 | if (($try) = grep(m#^_<.*$file#, keys %_main)) { |
210 | $file = substr($try,2); |
211 | print "\n$file:\n"; |
76854fea |
212 | } |
213 | } |
fe14fcc3 |
214 | if (!defined $_main{'_<' . $file}) { |
215 | print OUT "There's no code here anything matching $file.\n"; |
216 | next CMD; |
217 | } |
218 | elsif ($file ne $filename) { |
219 | *dbline = "_<$file"; |
220 | $max = $#dbline; |
221 | $filename = $file; |
222 | $start = 1; |
223 | $cmd = "l"; |
224 | } }; |
225 | $cmd =~ /^l\b\s*(['A-Za-z_]['\w]*)/ && do { |
226 | $subname = $1; |
227 | $subname = "main'" . $subname unless $subname =~ /'/; |
228 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
229 | ($file,$subrange) = split(/:/,$sub{$subname}); |
230 | if ($file ne $filename) { |
231 | *dbline = "_<$file"; |
232 | $max = $#dbline; |
233 | $filename = $file; |
234 | } |
235 | if ($subrange) { |
236 | if (eval($subrange) < -$window) { |
237 | $subrange =~ s/-.*/+/; |
238 | } |
239 | $cmd = "l $subrange"; |
240 | } else { |
241 | print OUT "Subroutine $1 not found.\n"; |
242 | next CMD; |
243 | } }; |
244 | $cmd =~ /^w\b\s*(\d*)$/ && do { |
245 | $incr = $window - 1; |
246 | $start = $1 if $1; |
247 | $start -= $preview; |
248 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
249 | $cmd =~ /^-$/ && do { |
250 | $incr = $window - 1; |
251 | $cmd = 'l ' . ($start-$window*2) . '+'; }; |
252 | $cmd =~ /^l$/ && do { |
253 | $incr = $window - 1; |
254 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
255 | $cmd =~ /^l\b\s*(\d*)\+(\d*)$/ && do { |
256 | $start = $1 if $1; |
257 | $incr = $2; |
258 | $incr = $window - 1 unless $incr; |
259 | $cmd = 'l ' . $start . '-' . ($start + $incr); }; |
260 | $cmd =~ /^l\b\s*(([\d\$\.]+)([-,]([\d\$\.]+))?)?/ && do { |
261 | $end = (!$2) ? $max : ($4 ? $4 : $2); |
262 | $end = $max if $end > $max; |
263 | $i = $2; |
264 | $i = $line if $i eq '.'; |
265 | $i = 1 if $i < 1; |
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266 | if ($emacs) { |
267 | print OUT "\032\032$filename:$i:0\n"; |
268 | $i = $end; |
269 | } else { |
270 | for (; $i <= $end; $i++) { |
271 | print OUT "$i:\t", $dbline[$i]; |
272 | last if $signal; |
273 | } |
a687059c |
274 | } |
fe14fcc3 |
275 | $start = $i; # remember in case they want more |
276 | $start = $max if $start > $max; |
277 | next CMD; }; |
278 | $cmd =~ /^D$/ && do { |
279 | print OUT "Deleting all breakpoints...\n"; |
280 | for ($i = 1; $i <= $max ; $i++) { |
281 | if (defined $dbline{$i}) { |
282 | $dbline{$i} =~ s/^[^\0]+//; |
283 | if ($dbline{$i} =~ s/^\0?$//) { |
284 | delete $dbline{$i}; |
285 | } |
286 | } |
287 | } |
288 | next CMD; }; |
289 | $cmd =~ /^L$/ && do { |
290 | for ($i = 1; $i <= $max; $i++) { |
291 | if (defined $dbline{$i}) { |
292 | print OUT "$i:\t", $dbline[$i]; |
293 | ($stop,$action) = split(/\0/, $dbline{$i}); |
294 | print OUT " break if (", $stop, ")\n" |
295 | if $stop; |
296 | print OUT " action: ", $action, "\n" |
297 | if $action; |
298 | last if $signal; |
299 | } |
300 | } |
301 | next CMD; }; |
302 | $cmd =~ /^b\b\s*(['A-Za-z_]['\w]*)\s*(.*)/ && do { |
303 | $subname = $1; |
304 | $cond = $2 || '1'; |
305 | $subname = "$package'" . $subname unless $subname =~ /'/; |
306 | $subname = "main" . $subname if substr($subname,0,1) eq "'"; |
307 | ($filename,$i) = split(/[:-]/, $sub{$subname}); |
308 | if ($i) { |
309 | *dbline = "_<$filename"; |
310 | ++$i while $dbline[$i] == 0 && $i < $#dbline; |
311 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
312 | } else { |
313 | print OUT "Subroutine $subname not found.\n"; |
76854fea |
314 | } |
fe14fcc3 |
315 | next CMD; }; |
316 | $cmd =~ /^b\b\s*(\d*)\s*(.*)/ && do { |
317 | $i = ($1?$1:$line); |
318 | $cond = $2 || '1'; |
76854fea |
319 | if ($dbline[$i] == 0) { |
fe14fcc3 |
320 | print OUT "Line $i not breakable.\n"; |
321 | } else { |
322 | $dbline{$i} =~ s/^[^\0]*/$cond/; |
a687059c |
323 | } |
fe14fcc3 |
324 | next CMD; }; |
325 | $cmd =~ /^d\b\s*(\d+)?/ && do { |
326 | $i = ($1?$1:$line); |
327 | $dbline{$i} =~ s/^[^\0]*//; |
328 | delete $dbline{$i} if $dbline{$i} eq ''; |
329 | next CMD; }; |
330 | $cmd =~ /^A$/ && do { |
331 | for ($i = 1; $i <= $max ; $i++) { |
332 | if (defined $dbline{$i}) { |
333 | $dbline{$i} =~ s/\0[^\0]*//; |
334 | delete $dbline{$i} if $dbline{$i} eq ''; |
76854fea |
335 | } |
fe14fcc3 |
336 | } |
337 | next CMD; }; |
338 | $cmd =~ /^<\s*(.*)/ && do { |
339 | $pre = do action($1); |
340 | next CMD; }; |
341 | $cmd =~ /^>\s*(.*)/ && do { |
342 | $post = do action($1); |
343 | next CMD; }; |
344 | $cmd =~ /^a\b\s*(\d+)(\s+(.*))?/ && do { |
345 | $i = $1; |
346 | if ($dbline[$i] == 0) { |
347 | print OUT "Line $i may not have an action.\n"; |
348 | } else { |
349 | $dbline{$i} =~ s/\0[^\0]*//; |
350 | $dbline{$i} .= "\0" . do action($3); |
351 | } |
352 | next CMD; }; |
353 | $cmd =~ /^n$/ && do { |
354 | $single = 2; |
355 | $laststep = $cmd; |
356 | last CMD; }; |
357 | $cmd =~ /^s$/ && do { |
358 | $single = 1; |
359 | $laststep = $cmd; |
360 | last CMD; }; |
361 | $cmd =~ /^c\b\s*(\d*)\s*$/ && do { |
362 | $i = $1; |
363 | if ($i) { |
364 | if ($dbline[$i] == 0) { |
365 | print OUT "Line $i not breakable.\n"; |
366 | next CMD; |
76854fea |
367 | } |
fe14fcc3 |
368 | $dbline{$i} =~ s/(\0|$)/;9$1/; # add one-time-only b.p. |
76854fea |
369 | } |
fe14fcc3 |
370 | for ($i=0; $i <= $#stack; ) { |
371 | $stack[$i++] &= ~1; |
a687059c |
372 | } |
fe14fcc3 |
373 | last CMD; }; |
374 | $cmd =~ /^r$/ && do { |
375 | $stack[$#stack] |= 2; |
376 | last CMD; }; |
377 | $cmd =~ /^T$/ && do { |
378 | local($p,$f,$l,$s,$h,$a,@a,@sub); |
379 | for ($i = 1; ($p,$f,$l,$s,$h,$w) = caller($i); $i++) { |
380 | @a = @args; |
381 | for (@a) { |
382 | if (/^StB\000/ && length($_) == length($_main{'_main'})) { |
383 | $_ = sprintf("%s",$_); |
384 | } |
385 | else { |
386 | s/'/\\'/g; |
387 | s/([^\0]*)/'$1'/ unless /^-?[\d.]+$/; |
388 | s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg; |
389 | s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg; |
390 | } |
391 | } |
392 | $w = $w ? '@ = ' : '$ = '; |
393 | $a = $h ? '(' . join(', ', @a) . ')' : ''; |
394 | push(@sub, "$w&$s$a from file $f line $l\n"); |
395 | last if $signal; |
a687059c |
396 | } |
fe14fcc3 |
397 | for ($i=0; $i <= $#sub; $i++) { |
398 | last if $signal; |
399 | print OUT $sub[$i]; |
a687059c |
400 | } |
fe14fcc3 |
401 | next CMD; }; |
402 | $cmd =~ /^\/(.*)$/ && do { |
403 | $inpat = $1; |
404 | $inpat =~ s:([^\\])/$:$1:; |
405 | if ($inpat ne "") { |
406 | eval '$inpat =~ m'."\n$inpat\n"; |
407 | if ($@ ne "") { |
408 | print OUT "$@"; |
409 | next CMD; |
410 | } |
411 | $pat = $inpat; |
a687059c |
412 | } |
fe14fcc3 |
413 | $end = $start; |
414 | eval ' |
415 | for (;;) { |
416 | ++$start; |
417 | $start = 1 if ($start > $max); |
418 | last if ($start == $end); |
419 | if ($dbline[$start] =~ m'."\n$pat\n".'i) { |
f0fcb552 |
420 | if ($emacs) { |
421 | print OUT "\032\032$filename:$start:0\n"; |
422 | } else { |
423 | print OUT "$start:\t", $dbline[$start], "\n"; |
424 | } |
fe14fcc3 |
425 | last; |
426 | } |
427 | } '; |
428 | print OUT "/$pat/: not found\n" if ($start == $end); |
429 | next CMD; }; |
430 | $cmd =~ /^\?(.*)$/ && do { |
431 | $inpat = $1; |
432 | $inpat =~ s:([^\\])\?$:$1:; |
433 | if ($inpat ne "") { |
434 | eval '$inpat =~ m'."\n$inpat\n"; |
435 | if ($@ ne "") { |
436 | print OUT "$@"; |
437 | next CMD; |
438 | } |
439 | $pat = $inpat; |
440 | } |
441 | $end = $start; |
442 | eval ' |
443 | for (;;) { |
444 | --$start; |
445 | $start = $max if ($start <= 0); |
446 | last if ($start == $end); |
447 | if ($dbline[$start] =~ m'."\n$pat\n".'i) { |
f0fcb552 |
448 | if ($emacs) { |
449 | print OUT "\032\032$filename:$start:0\n"; |
450 | } else { |
451 | print OUT "$start:\t", $dbline[$start], "\n"; |
452 | } |
fe14fcc3 |
453 | last; |
454 | } |
455 | } '; |
456 | print OUT "?$pat?: not found\n" if ($start == $end); |
457 | next CMD; }; |
458 | $cmd =~ /^!+\s*(-)?(\d+)?$/ && do { |
459 | pop(@hist) if length($cmd) > 1; |
460 | $i = ($1?($#hist-($2?$2:1)):($2?$2:$#hist)); |
461 | $cmd = $hist[$i] . "\n"; |
462 | print OUT $cmd; |
463 | redo CMD; }; |
464 | $cmd =~ /^!(.+)$/ && do { |
465 | $pat = "^$1"; |
466 | pop(@hist) if length($cmd) > 1; |
467 | for ($i = $#hist; $i; --$i) { |
468 | last if $hist[$i] =~ $pat; |
469 | } |
470 | if (!$i) { |
471 | print OUT "No such command!\n\n"; |
472 | next CMD; |
473 | } |
474 | $cmd = $hist[$i] . "\n"; |
475 | print OUT $cmd; |
476 | redo CMD; }; |
477 | $cmd =~ /^H\b\s*(-(\d+))?/ && do { |
478 | $end = $2?($#hist-$2):0; |
479 | $hist = 0 if $hist < 0; |
480 | for ($i=$#hist; $i>$end; $i--) { |
481 | print OUT "$i: ",$hist[$i],"\n" |
482 | unless $hist[$i] =~ /^.?$/; |
483 | }; |
484 | next CMD; }; |
485 | $cmd =~ s/^p( .*)?$/print DB'OUT$1/; |
486 | $cmd =~ /^=/ && do { |
487 | if (local($k,$v) = ($cmd =~ /^=\s*(\S+)\s+(.*)/)) { |
488 | $alias{$k}="s~$k~$v~"; |
489 | print OUT "$k = $v\n"; |
490 | } elsif ($cmd =~ /^=\s*$/) { |
491 | foreach $k (sort keys(%alias)) { |
492 | if (($v = $alias{$k}) =~ s~^s\~$k\~(.*)\~$~$1~) { |
493 | print OUT "$k = $v\n"; |
494 | } else { |
495 | print OUT "$k\t$alias{$k}\n"; |
496 | }; |
33b78306 |
497 | }; |
498 | }; |
fe14fcc3 |
499 | next CMD; }; |
500 | } |
27e2fb84 |
501 | $evalarg = $cmd; &eval; |
76854fea |
502 | print OUT "\n"; |
a687059c |
503 | } |
504 | if ($post) { |
27e2fb84 |
505 | $evalarg = $post; &eval; |
a687059c |
506 | } |
507 | } |
76854fea |
508 | ($@, $!, $[, $,, $/, $\) = @saved; |
509 | } |
510 | |
511 | sub save { |
512 | @saved = ($@, $!, $[, $,, $/, $\); |
513 | $[ = 0; $, = ""; $/ = "\n"; $\ = ""; |
514 | } |
515 | |
27e2fb84 |
516 | # The following takes its argument via $evalarg to preserve current @_ |
517 | |
76854fea |
518 | sub eval { |
27e2fb84 |
519 | eval "$usercontext $evalarg; &DB'save"; |
76854fea |
520 | print OUT $@; |
a687059c |
521 | } |
522 | |
523 | sub action { |
524 | local($action) = @_; |
525 | while ($action =~ s/\\$//) { |
526 | print OUT "+ "; |
76854fea |
527 | $action .= &gets; |
a687059c |
528 | } |
529 | $action; |
530 | } |
531 | |
76854fea |
532 | sub gets { |
533 | local($.); |
534 | <IN>; |
535 | } |
536 | |
a687059c |
537 | sub catch { |
538 | $signal = 1; |
539 | } |
540 | |
541 | sub sub { |
542 | push(@stack, $single); |
543 | $single &= 1; |
544 | $single |= 4 if $#stack == $deep; |
a687059c |
545 | if (wantarray) { |
546 | @i = &$sub; |
79a0689e |
547 | $single |= pop(@stack); |
548 | @i; |
a687059c |
549 | } |
550 | else { |
551 | $i = &$sub; |
79a0689e |
552 | $single |= pop(@stack); |
553 | $i; |
a687059c |
554 | } |
a687059c |
555 | } |
556 | |
557 | $single = 1; # so it stops on first executable statement |
a687059c |
558 | @hist = ('?'); |
559 | $SIG{'INT'} = "DB'catch"; |
560 | $deep = 100; # warning if stack gets this deep |
561 | $window = 10; |
562 | $preview = 3; |
563 | |
564 | @stack = (0); |
76854fea |
565 | @ARGS = @ARGV; |
a687059c |
566 | for (@args) { |
567 | s/'/\\'/g; |
568 | s/(.*)/'$1'/ unless /^-?[\d.]+$/; |
569 | } |
a687059c |
570 | |
571 | if (-f '.perldb') { |
572 | do './.perldb'; |
573 | } |
574 | elsif (-f "$ENV{'LOGDIR'}/.perldb") { |
575 | do "$ENV{'LOGDIR'}/.perldb"; |
576 | } |
577 | elsif (-f "$ENV{'HOME'}/.perldb") { |
578 | do "$ENV{'HOME'}/.perldb"; |
579 | } |
580 | |
581 | 1; |