/[jscoverage]/trunk/instrument-js.cpp
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Annotation of /trunk/instrument-js.cpp

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Revision 245 - (hide annotations)
Sun Oct 5 18:05:12 2008 UTC (10 years, 6 months ago) by siliconforks
Original Path: trunk/instrument-js.c
File MIME type: text/plain
File size: 44136 byte(s)
Remove duplicate code.
1 siliconforks 2 /*
2     instrument-js.c - JavaScript instrumentation routines
3 siliconforks 87 Copyright (C) 2007, 2008 siliconforks.com
4 siliconforks 2
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9    
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13     GNU General Public License for more details.
14    
15     You should have received a copy of the GNU General Public License along
16     with this program; if not, write to the Free Software Foundation, Inc.,
17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18     */
19    
20 siliconforks 116 #include <config.h>
21    
22 siliconforks 2 #include "instrument-js.h"
23    
24     #include <assert.h>
25     #include <stdlib.h>
26     #include <string.h>
27    
28     #include <jsapi.h>
29     #include <jsatom.h>
30     #include <jsfun.h>
31     #include <jsinterp.h>
32     #include <jsparse.h>
33     #include <jsregexp.h>
34     #include <jsscope.h>
35     #include <jsstr.h>
36    
37 siliconforks 174 #include "encoding.h"
38 siliconforks 179 #include "global.h"
39     #include "highlight.h"
40 siliconforks 116 #include "resource-manager.h"
41 siliconforks 2 #include "util.h"
42    
43 siliconforks 240 struct IfDirective {
44     const jschar * condition_start;
45     const jschar * condition_end;
46     uint16_t start_line;
47     uint16_t end_line;
48     struct IfDirective * next;
49     };
50    
51     static bool * exclusive_directives = NULL;
52    
53 siliconforks 2 static JSRuntime * runtime = NULL;
54     static JSContext * context = NULL;
55     static JSObject * global = NULL;
56    
57     /*
58     JSParseNode objects store line numbers starting from 1.
59     The lines array stores line numbers starting from 0.
60     */
61     static const char * file_id = NULL;
62     static char * lines = NULL;
63 siliconforks 214 static uint16_t num_lines = 0;
64 siliconforks 2
65     void jscoverage_init(void) {
66     runtime = JS_NewRuntime(8L * 1024L * 1024L);
67     if (runtime == NULL) {
68     fatal("cannot create runtime");
69     }
70    
71     context = JS_NewContext(runtime, 8192);
72     if (context == NULL) {
73     fatal("cannot create context");
74     }
75    
76     global = JS_NewObject(context, NULL, NULL, NULL);
77     if (global == NULL) {
78     fatal("cannot create global object");
79     }
80    
81     if (! JS_InitStandardClasses(context, global)) {
82     fatal("cannot initialize standard classes");
83     }
84     }
85    
86     void jscoverage_cleanup(void) {
87     JS_DestroyContext(context);
88     JS_DestroyRuntime(runtime);
89     }
90    
91 siliconforks 92 static void print_string(JSString * s, Stream * f) {
92 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
93     jschar * characters = JSSTRING_CHARS(s);
94     for (size_t i = 0; i < length; i++) {
95     jschar c = characters[i];
96     if (32 <= c && c <= 126) {
97     switch (c) {
98     case '"':
99     Stream_write_string(f, "\\\"");
100     break;
101     /*
102     case '\'':
103     Stream_write_string(f, "\\'");
104     break;
105     */
106     case '\\':
107     Stream_write_string(f, "\\\\");
108     break;
109     default:
110     Stream_write_char(f, c);
111     break;
112     }
113     }
114     else {
115     switch (c) {
116     case 0x8:
117     Stream_write_string(f, "\\b");
118     break;
119     case 0x9:
120     Stream_write_string(f, "\\t");
121     break;
122     case 0xa:
123     Stream_write_string(f, "\\n");
124     break;
125     case 0xb:
126     Stream_write_string(f, "\\v");
127     break;
128     case 0xc:
129     Stream_write_string(f, "\\f");
130     break;
131     case 0xd:
132     Stream_write_string(f, "\\r");
133     break;
134     default:
135     Stream_printf(f, "\\u%04x", c);
136     break;
137     }
138     }
139 siliconforks 2 }
140     }
141    
142 siliconforks 92 static void print_string_atom(JSAtom * atom, Stream * f) {
143 siliconforks 2 assert(ATOM_IS_STRING(atom));
144     JSString * s = ATOM_TO_STRING(atom);
145     print_string(s, f);
146     }
147    
148 siliconforks 174 static void print_regex(jsval value, Stream * f) {
149 siliconforks 2 assert(JSVAL_IS_STRING(value));
150     JSString * s = JSVAL_TO_STRING(value);
151 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
152     jschar * characters = JSSTRING_CHARS(s);
153     for (size_t i = 0; i < length; i++) {
154     jschar c = characters[i];
155     if (32 <= c && c <= 126) {
156     Stream_write_char(f, c);
157     }
158     else {
159     Stream_printf(f, "\\u%04x", c);
160     }
161     }
162 siliconforks 2 }
163    
164 siliconforks 92 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
165 siliconforks 2 assert(ATOM_IS_STRING(atom));
166     JSString * s = ATOM_TO_STRING(atom);
167 siliconforks 174 Stream_write_char(f, '"');
168     print_string(s, f);
169     Stream_write_char(f, '"');
170 siliconforks 2 }
171    
172     static const char * get_op(uint8 op) {
173     switch(op) {
174     case JSOP_BITOR:
175     return "|";
176     case JSOP_BITXOR:
177     return "^";
178     case JSOP_BITAND:
179     return "&";
180     case JSOP_EQ:
181     return "==";
182     case JSOP_NE:
183     return "!=";
184     case JSOP_NEW_EQ:
185     return "===";
186     case JSOP_NEW_NE:
187     return "!==";
188     case JSOP_LT:
189     return "<";
190     case JSOP_LE:
191     return "<=";
192     case JSOP_GT:
193     return ">";
194     case JSOP_GE:
195     return ">=";
196     case JSOP_LSH:
197     return "<<";
198     case JSOP_RSH:
199     return ">>";
200     case JSOP_URSH:
201     return ">>>";
202     case JSOP_ADD:
203     return "+";
204     case JSOP_SUB:
205     return "-";
206     case JSOP_MUL:
207     return "*";
208     case JSOP_DIV:
209     return "/";
210     case JSOP_MOD:
211     return "%";
212     default:
213     abort();
214     }
215     }
216    
217 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f);
218 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
219 siliconforks 2
220 siliconforks 155 enum FunctionType {
221     FUNCTION_NORMAL,
222     FUNCTION_GETTER_OR_SETTER
223     };
224    
225     static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
226 siliconforks 156 assert(node->pn_arity == PN_FUNC);
227     assert(ATOM_IS_OBJECT(node->pn_funAtom));
228     JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);
229     assert(JS_ObjectIsFunction(context, object));
230     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
231     assert(function);
232     assert(object == function->object);
233     Stream_printf(f, "%*s", indent, "");
234     if (type == FUNCTION_NORMAL) {
235     Stream_write_string(f, "function");
236     }
237 siliconforks 2
238 siliconforks 156 /* function name */
239     if (function->atom) {
240     Stream_write_char(f, ' ');
241     print_string_atom(function->atom, f);
242     }
243 siliconforks 2
244 siliconforks 156 /* function parameters */
245     Stream_write_string(f, "(");
246     JSAtom ** params = xnew(JSAtom *, function->nargs);
247     for (int i = 0; i < function->nargs; i++) {
248     /* initialize to NULL for sanity check */
249     params[i] = NULL;
250     }
251     JSScope * scope = OBJ_SCOPE(object);
252     for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {
253     if (scope_property->getter != js_GetArgument) {
254     continue;
255 siliconforks 2 }
256 siliconforks 156 assert(scope_property->flags & SPROP_HAS_SHORTID);
257     assert((uint16) scope_property->shortid < function->nargs);
258     assert(JSID_IS_ATOM(scope_property->id));
259     params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);
260     }
261     for (int i = 0; i < function->nargs; i++) {
262     assert(params[i] != NULL);
263     if (i > 0) {
264     Stream_write_string(f, ", ");
265 siliconforks 2 }
266 siliconforks 156 if (ATOM_IS_STRING(params[i])) {
267     print_string_atom(params[i], f);
268 siliconforks 2 }
269 siliconforks 156 }
270     Stream_write_string(f, ") {\n");
271     free(params);
272 siliconforks 2
273 siliconforks 156 /* function body */
274 siliconforks 240 instrument_statement(node->pn_body, f, indent + 2, false);
275 siliconforks 2
276 siliconforks 156 Stream_write_string(f, "}\n");
277 siliconforks 2 }
278    
279 siliconforks 92 static void instrument_function_call(JSParseNode * node, Stream * f) {
280 siliconforks 2 instrument_expression(node->pn_head, f);
281 siliconforks 92 Stream_write_char(f, '(');
282 siliconforks 2 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
283     if (p != node->pn_head->pn_next) {
284 siliconforks 92 Stream_write_string(f, ", ");
285 siliconforks 2 }
286     instrument_expression(p, f);
287     }
288 siliconforks 92 Stream_write_char(f, ')');
289 siliconforks 2 }
290    
291     /*
292     See <Expressions> in jsparse.h.
293     TOK_FUNCTION is handled as a statement and as an expression.
294     TOK_DBLDOT is not handled (XML op).
295     TOK_DEFSHARP and TOK_USESHARP are not handled.
296     TOK_ANYNAME is not handled (XML op).
297     TOK_AT is not handled (XML op).
298     TOK_DBLCOLON is not handled.
299     TOK_XML* are not handled.
300     There seem to be some undocumented expressions:
301     TOK_INSTANCEOF binary
302     TOK_IN binary
303     */
304 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
305 siliconforks 2 switch (node->pn_type) {
306     case TOK_FUNCTION:
307 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
308 siliconforks 2 break;
309     case TOK_COMMA:
310     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
311     if (p != node->pn_head) {
312 siliconforks 92 Stream_write_string(f, ", ");
313 siliconforks 2 }
314     instrument_expression(p, f);
315     }
316     break;
317     case TOK_ASSIGN:
318     instrument_expression(node->pn_left, f);
319 siliconforks 92 Stream_write_char(f, ' ');
320 siliconforks 2 switch (node->pn_op) {
321     case JSOP_ADD:
322     case JSOP_SUB:
323     case JSOP_MUL:
324     case JSOP_MOD:
325     case JSOP_LSH:
326     case JSOP_RSH:
327     case JSOP_URSH:
328     case JSOP_BITAND:
329     case JSOP_BITOR:
330     case JSOP_BITXOR:
331     case JSOP_DIV:
332 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
333 siliconforks 2 break;
334     default:
335     /* do nothing - it must be a simple assignment */
336     break;
337     }
338 siliconforks 92 Stream_write_string(f, "= ");
339 siliconforks 2 instrument_expression(node->pn_right, f);
340     break;
341     case TOK_HOOK:
342     instrument_expression(node->pn_kid1, f);
343 siliconforks 92 Stream_write_string(f, "? ");
344 siliconforks 2 instrument_expression(node->pn_kid2, f);
345 siliconforks 92 Stream_write_string(f, ": ");
346 siliconforks 2 instrument_expression(node->pn_kid3, f);
347     break;
348     case TOK_OR:
349     instrument_expression(node->pn_left, f);
350 siliconforks 92 Stream_write_string(f, " || ");
351 siliconforks 2 instrument_expression(node->pn_right, f);
352     break;
353     case TOK_AND:
354     instrument_expression(node->pn_left, f);
355 siliconforks 92 Stream_write_string(f, " && ");
356 siliconforks 2 instrument_expression(node->pn_right, f);
357     break;
358     case TOK_BITOR:
359     case TOK_BITXOR:
360     case TOK_BITAND:
361     case TOK_EQOP:
362     case TOK_RELOP:
363     case TOK_SHOP:
364     case TOK_PLUS:
365     case TOK_MINUS:
366     case TOK_STAR:
367     case TOK_DIVOP:
368     switch (node->pn_arity) {
369     case PN_BINARY:
370     instrument_expression(node->pn_left, f);
371 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
372 siliconforks 2 instrument_expression(node->pn_right, f);
373     break;
374     case PN_LIST:
375     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
376     if (p != node->pn_head) {
377 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
378 siliconforks 2 }
379     instrument_expression(p, f);
380     }
381     break;
382     default:
383     abort();
384     }
385     break;
386     case TOK_UNARYOP:
387     switch (node->pn_op) {
388     case JSOP_NEG:
389 siliconforks 92 Stream_write_char(f, '-');
390 siliconforks 2 instrument_expression(node->pn_kid, f);
391     break;
392     case JSOP_POS:
393 siliconforks 92 Stream_write_char(f, '+');
394 siliconforks 2 instrument_expression(node->pn_kid, f);
395     break;
396     case JSOP_NOT:
397 siliconforks 92 Stream_write_char(f, '!');
398 siliconforks 2 instrument_expression(node->pn_kid, f);
399     break;
400     case JSOP_BITNOT:
401 siliconforks 92 Stream_write_char(f, '~');
402 siliconforks 2 instrument_expression(node->pn_kid, f);
403     break;
404     case JSOP_TYPEOF:
405 siliconforks 92 Stream_write_string(f, "typeof ");
406 siliconforks 2 instrument_expression(node->pn_kid, f);
407     break;
408     case JSOP_VOID:
409 siliconforks 92 Stream_write_string(f, "void ");
410 siliconforks 2 instrument_expression(node->pn_kid, f);
411     break;
412     default:
413     abort();
414     break;
415     }
416     break;
417     case TOK_INC:
418     case TOK_DEC:
419     /*
420     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
421     */
422     switch (node->pn_op) {
423     case JSOP_INCNAME:
424     case JSOP_INCPROP:
425     case JSOP_INCELEM:
426 siliconforks 92 Stream_write_string(f, "++");
427 siliconforks 2 instrument_expression(node->pn_kid, f);
428     break;
429     case JSOP_DECNAME:
430     case JSOP_DECPROP:
431     case JSOP_DECELEM:
432 siliconforks 92 Stream_write_string(f, "--");
433 siliconforks 2 instrument_expression(node->pn_kid, f);
434     break;
435     case JSOP_NAMEINC:
436     case JSOP_PROPINC:
437     case JSOP_ELEMINC:
438     instrument_expression(node->pn_kid, f);
439 siliconforks 92 Stream_write_string(f, "++");
440 siliconforks 2 break;
441     case JSOP_NAMEDEC:
442     case JSOP_PROPDEC:
443     case JSOP_ELEMDEC:
444     instrument_expression(node->pn_kid, f);
445 siliconforks 92 Stream_write_string(f, "--");
446 siliconforks 2 break;
447     default:
448     abort();
449     break;
450     }
451     break;
452     case TOK_NEW:
453 siliconforks 92 Stream_write_string(f, "new ");
454 siliconforks 2 instrument_function_call(node, f);
455     break;
456     case TOK_DELETE:
457 siliconforks 92 Stream_write_string(f, "delete ");
458 siliconforks 2 instrument_expression(node->pn_kid, f);
459     break;
460     case TOK_DOT:
461     /*
462     This may have originally been x['foo-bar']. Because the string 'foo-bar'
463     contains illegal characters, we have to use the subscript syntax instead of
464     the dot syntax.
465     */
466     instrument_expression(node->pn_expr, f);
467 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
468     {
469     JSString * s = ATOM_TO_STRING(node->pn_atom);
470     /* XXX - semantics changed in 1.7 */
471     if (! ATOM_KEYWORD(node->pn_atom) && js_IsIdentifier(s)) {
472 siliconforks 92 Stream_write_char(f, '.');
473 siliconforks 84 print_string_atom(node->pn_atom, f);
474     }
475     else {
476 siliconforks 92 Stream_write_char(f, '[');
477 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
478 siliconforks 92 Stream_write_char(f, ']');
479 siliconforks 84 }
480     }
481 siliconforks 2 break;
482     case TOK_LB:
483     instrument_expression(node->pn_left, f);
484 siliconforks 92 Stream_write_char(f, '[');
485 siliconforks 2 instrument_expression(node->pn_right, f);
486 siliconforks 92 Stream_write_char(f, ']');
487 siliconforks 2 break;
488     case TOK_LP:
489     instrument_function_call(node, f);
490     break;
491     case TOK_RB:
492 siliconforks 92 Stream_write_char(f, '[');
493 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
494     if (p != node->pn_head) {
495 siliconforks 92 Stream_write_string(f, ", ");
496 siliconforks 2 }
497     /* TOK_COMMA is a special case: a hole in the array */
498     if (p->pn_type != TOK_COMMA) {
499     instrument_expression(p, f);
500     }
501     }
502     if (node->pn_extra == PNX_ENDCOMMA) {
503 siliconforks 92 Stream_write_char(f, ',');
504 siliconforks 2 }
505 siliconforks 92 Stream_write_char(f, ']');
506 siliconforks 2 break;
507     case TOK_RC:
508 siliconforks 92 Stream_write_char(f, '{');
509 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
510     assert(p->pn_type == TOK_COLON);
511     if (p != node->pn_head) {
512 siliconforks 92 Stream_write_string(f, ", ");
513 siliconforks 2 }
514 siliconforks 155
515     /* check whether this is a getter or setter */
516     switch (p->pn_op) {
517     case JSOP_GETTER:
518     Stream_write_string(f, "get ");
519     instrument_expression(p->pn_left, f);
520     instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
521     break;
522     case JSOP_SETTER:
523     Stream_write_string(f, "set ");
524     instrument_expression(p->pn_left, f);
525     instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
526     break;
527     default:
528     instrument_expression(p->pn_left, f);
529     Stream_write_string(f, ": ");
530     instrument_expression(p->pn_right, f);
531     break;
532     }
533 siliconforks 2 }
534 siliconforks 92 Stream_write_char(f, '}');
535 siliconforks 2 break;
536     case TOK_RP:
537 siliconforks 92 Stream_write_char(f, '(');
538 siliconforks 2 instrument_expression(node->pn_kid, f);
539 siliconforks 92 Stream_write_char(f, ')');
540 siliconforks 2 break;
541     case TOK_NAME:
542     print_string_atom(node->pn_atom, f);
543     break;
544     case TOK_STRING:
545     print_quoted_string_atom(node->pn_atom, f);
546     break;
547     case TOK_OBJECT:
548     switch (node->pn_op) {
549     case JSOP_OBJECT:
550     /* I assume this is JSOP_REGEXP */
551     abort();
552     break;
553     case JSOP_REGEXP:
554     assert(ATOM_IS_OBJECT(node->pn_atom));
555     {
556     JSObject * object = ATOM_TO_OBJECT(node->pn_atom);
557     jsval result;
558     js_regexp_toString(context, object, 0, NULL, &result);
559 siliconforks 174 print_regex(result, f);
560 siliconforks 2 }
561     break;
562     default:
563     abort();
564     break;
565     }
566     break;
567     case TOK_NUMBER:
568     /*
569     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
570     2^(-52) = 2.22 x 10^(-16)
571     Thus there are 16 significant digits.
572     To keep the output simple, special-case zero.
573     */
574     if (node->pn_dval == 0.0) {
575 siliconforks 92 Stream_write_string(f, "0");
576 siliconforks 2 }
577     else {
578 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
579 siliconforks 2 }
580     break;
581     case TOK_PRIMARY:
582     switch (node->pn_op) {
583     case JSOP_TRUE:
584 siliconforks 92 Stream_write_string(f, "true");
585 siliconforks 2 break;
586     case JSOP_FALSE:
587 siliconforks 92 Stream_write_string(f, "false");
588 siliconforks 2 break;
589     case JSOP_NULL:
590 siliconforks 92 Stream_write_string(f, "null");
591 siliconforks 2 break;
592     case JSOP_THIS:
593 siliconforks 92 Stream_write_string(f, "this");
594 siliconforks 2 break;
595     /* jsscan.h mentions `super' ??? */
596     default:
597     abort();
598     }
599     break;
600     case TOK_INSTANCEOF:
601     instrument_expression(node->pn_left, f);
602 siliconforks 92 Stream_write_string(f, " instanceof ");
603 siliconforks 2 instrument_expression(node->pn_right, f);
604     break;
605     case TOK_IN:
606     instrument_expression(node->pn_left, f);
607 siliconforks 92 Stream_write_string(f, " in ");
608 siliconforks 2 instrument_expression(node->pn_right, f);
609     break;
610     default:
611     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
612     }
613     }
614    
615 siliconforks 92 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
616 siliconforks 2 assert(node->pn_arity == PN_LIST);
617 siliconforks 92 Stream_printf(f, "%*s", indent, "");
618     Stream_write_string(f, "var ");
619 siliconforks 2 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
620     assert(p->pn_type == TOK_NAME);
621     assert(p->pn_arity == PN_NAME);
622     if (p != node->pn_head) {
623 siliconforks 92 Stream_write_string(f, ", ");
624 siliconforks 2 }
625     print_string_atom(p->pn_atom, f);
626     if (p->pn_expr != NULL) {
627 siliconforks 92 Stream_write_string(f, " = ");
628 siliconforks 2 instrument_expression(p->pn_expr, f);
629     }
630     }
631     }
632    
633 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
634 siliconforks 2 switch (node->pn_type) {
635     case TOK_FUNCTION:
636 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
637 siliconforks 2 break;
638     case TOK_LC:
639     assert(node->pn_arity == PN_LIST);
640     /*
641 siliconforks 92 Stream_write_string(f, "{\n");
642 siliconforks 2 */
643     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
644 siliconforks 240 instrument_statement(p, f, indent, false);
645 siliconforks 2 }
646     /*
647 siliconforks 92 Stream_printf(f, "%*s", indent, "");
648     Stream_write_string(f, "}\n");
649 siliconforks 2 */
650     break;
651     case TOK_IF:
652 siliconforks 240 {
653 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
654 siliconforks 240
655     uint16_t line = node->pn_pos.begin.lineno;
656     if (! is_jscoverage_if) {
657     if (line > num_lines) {
658     fatal("%s: script contains more than 65,535 lines", file_id);
659     }
660     if (line >= 2 && exclusive_directives[line - 2]) {
661     is_jscoverage_if = true;
662     }
663     }
664    
665 siliconforks 92 Stream_printf(f, "%*s", indent, "");
666     Stream_write_string(f, "if (");
667 siliconforks 2 instrument_expression(node->pn_kid1, f);
668 siliconforks 92 Stream_write_string(f, ") {\n");
669 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
670     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
671     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
672     Stream_printf(f, "%*s", indent + 2, "");
673     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
674     }
675     instrument_statement(node->pn_kid2, f, indent + 2, false);
676 siliconforks 92 Stream_printf(f, "%*s", indent, "");
677     Stream_write_string(f, "}\n");
678 siliconforks 240
679     if (node->pn_kid3 || is_jscoverage_if) {
680 siliconforks 92 Stream_printf(f, "%*s", indent, "");
681     Stream_write_string(f, "else {\n");
682 siliconforks 240
683     if (is_jscoverage_if) {
684     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
685     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
686     Stream_printf(f, "%*s", indent + 2, "");
687     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
688     }
689    
690     if (node->pn_kid3) {
691     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
692     }
693    
694 siliconforks 92 Stream_printf(f, "%*s", indent, "");
695     Stream_write_string(f, "}\n");
696 siliconforks 2 }
697 siliconforks 240
698 siliconforks 2 break;
699 siliconforks 240 }
700 siliconforks 2 case TOK_SWITCH:
701     assert(node->pn_arity == PN_BINARY);
702 siliconforks 92 Stream_printf(f, "%*s", indent, "");
703     Stream_write_string(f, "switch (");
704 siliconforks 2 instrument_expression(node->pn_left, f);
705 siliconforks 92 Stream_write_string(f, ") {\n");
706 siliconforks 2 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
707 siliconforks 92 Stream_printf(f, "%*s", indent, "");
708 siliconforks 2 switch (p->pn_type) {
709     case TOK_CASE:
710 siliconforks 92 Stream_write_string(f, "case ");
711 siliconforks 2 instrument_expression(p->pn_left, f);
712 siliconforks 92 Stream_write_string(f, ":\n");
713 siliconforks 2 break;
714     case TOK_DEFAULT:
715 siliconforks 92 Stream_write_string(f, "default:\n");
716 siliconforks 2 break;
717     default:
718     abort();
719     break;
720     }
721 siliconforks 240 instrument_statement(p->pn_right, f, indent + 2, false);
722 siliconforks 2 }
723 siliconforks 92 Stream_printf(f, "%*s", indent, "");
724     Stream_write_string(f, "}\n");
725 siliconforks 2 break;
726     case TOK_CASE:
727     case TOK_DEFAULT:
728     abort();
729     break;
730     case TOK_WHILE:
731     assert(node->pn_arity == PN_BINARY);
732 siliconforks 92 Stream_printf(f, "%*s", indent, "");
733     Stream_write_string(f, "while (");
734 siliconforks 2 instrument_expression(node->pn_left, f);
735 siliconforks 92 Stream_write_string(f, ") {\n");
736 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
737 siliconforks 92 Stream_write_string(f, "}\n");
738 siliconforks 2 break;
739     case TOK_DO:
740     assert(node->pn_arity == PN_BINARY);
741 siliconforks 92 Stream_printf(f, "%*s", indent, "");
742     Stream_write_string(f, "do {\n");
743 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
744 siliconforks 92 Stream_write_string(f, "}\n");
745     Stream_printf(f, "%*s", indent, "");
746     Stream_write_string(f, "while (");
747 siliconforks 2 instrument_expression(node->pn_right, f);
748 siliconforks 92 Stream_write_string(f, ");\n");
749 siliconforks 2 break;
750     case TOK_FOR:
751     assert(node->pn_arity == PN_BINARY);
752 siliconforks 92 Stream_printf(f, "%*s", indent, "");
753     Stream_write_string(f, "for (");
754 siliconforks 2 switch (node->pn_left->pn_type) {
755     case TOK_IN:
756     /* for/in */
757     assert(node->pn_left->pn_arity == PN_BINARY);
758     switch (node->pn_left->pn_left->pn_type) {
759     case TOK_VAR:
760     instrument_var_statement(node->pn_left->pn_left, f, 0);
761     break;
762     case TOK_NAME:
763     instrument_expression(node->pn_left->pn_left, f);
764     break;
765     default:
766     /* this is undocumented: for (x.value in y) */
767     instrument_expression(node->pn_left->pn_left, f);
768     break;
769     /*
770     default:
771     fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
772     abort();
773     break;
774     */
775     }
776 siliconforks 92 Stream_write_string(f, " in ");
777 siliconforks 2 instrument_expression(node->pn_left->pn_right, f);
778     break;
779     case TOK_RESERVED:
780     /* for (;;) */
781     assert(node->pn_left->pn_arity == PN_TERNARY);
782     if (node->pn_left->pn_kid1) {
783     if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {
784     instrument_var_statement(node->pn_left->pn_kid1, f, 0);
785     }
786     else {
787     instrument_expression(node->pn_left->pn_kid1, f);
788     }
789     }
790 siliconforks 92 Stream_write_string(f, ";");
791 siliconforks 2 if (node->pn_left->pn_kid2) {
792 siliconforks 92 Stream_write_char(f, ' ');
793 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
794     }
795 siliconforks 92 Stream_write_string(f, ";");
796 siliconforks 2 if (node->pn_left->pn_kid3) {
797 siliconforks 92 Stream_write_char(f, ' ');
798 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
799     }
800     break;
801     default:
802     abort();
803     break;
804     }
805 siliconforks 92 Stream_write_string(f, ") {\n");
806 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
807 siliconforks 92 Stream_write_string(f, "}\n");
808 siliconforks 2 break;
809     case TOK_THROW:
810     assert(node->pn_arity == PN_UNARY);
811 siliconforks 92 Stream_printf(f, "%*s", indent, "");
812     Stream_write_string(f, "throw ");
813 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
814 siliconforks 92 Stream_write_string(f, ";\n");
815 siliconforks 2 break;
816     case TOK_TRY:
817 siliconforks 92 Stream_printf(f, "%*s", indent, "");
818     Stream_write_string(f, "try {\n");
819 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
820 siliconforks 92 Stream_printf(f, "%*s", indent, "");
821     Stream_write_string(f, "}\n");
822 siliconforks 2 {
823     for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {
824     assert(catch->pn_type == TOK_CATCH);
825 siliconforks 92 Stream_printf(f, "%*s", indent, "");
826     Stream_write_string(f, "catch (");
827 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
828     print_string_atom(catch->pn_kid1->pn_atom, f);
829     if (catch->pn_kid1->pn_expr) {
830 siliconforks 92 Stream_write_string(f, " if ");
831 siliconforks 2 instrument_expression(catch->pn_kid1->pn_expr, f);
832     }
833 siliconforks 92 Stream_write_string(f, ") {\n");
834 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
835 siliconforks 92 Stream_printf(f, "%*s", indent, "");
836     Stream_write_string(f, "}\n");
837 siliconforks 2 }
838     }
839     if (node->pn_kid3) {
840 siliconforks 92 Stream_printf(f, "%*s", indent, "");
841     Stream_write_string(f, "finally {\n");
842 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
843 siliconforks 92 Stream_printf(f, "%*s", indent, "");
844     Stream_write_string(f, "}\n");
845 siliconforks 2 }
846     break;
847     case TOK_CATCH:
848     abort();
849     break;
850     case TOK_BREAK:
851     case TOK_CONTINUE:
852     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
853 siliconforks 92 Stream_printf(f, "%*s", indent, "");
854     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
855 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
856     if (atom != NULL) {
857 siliconforks 92 Stream_write_char(f, ' ');
858 siliconforks 2 print_string_atom(node->pn_atom, f);
859     }
860 siliconforks 92 Stream_write_string(f, ";\n");
861 siliconforks 2 break;
862     case TOK_WITH:
863     assert(node->pn_arity == PN_BINARY);
864 siliconforks 92 Stream_printf(f, "%*s", indent, "");
865     Stream_write_string(f, "with (");
866 siliconforks 2 instrument_expression(node->pn_left, f);
867 siliconforks 92 Stream_write_string(f, ") {\n");
868 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
869 siliconforks 92 Stream_printf(f, "%*s", indent, "");
870     Stream_write_string(f, "}\n");
871 siliconforks 2 break;
872     case TOK_VAR:
873     instrument_var_statement(node, f, indent);
874 siliconforks 92 Stream_write_string(f, ";\n");
875 siliconforks 2 break;
876     case TOK_RETURN:
877     assert(node->pn_arity == PN_UNARY);
878 siliconforks 92 Stream_printf(f, "%*s", indent, "");
879     Stream_write_string(f, "return");
880 siliconforks 2 if (node->pn_kid != NULL) {
881 siliconforks 92 Stream_write_char(f, ' ');
882 siliconforks 2 instrument_expression(node->pn_kid, f);
883     }
884 siliconforks 92 Stream_write_string(f, ";\n");
885 siliconforks 2 break;
886     case TOK_SEMI:
887     assert(node->pn_arity == PN_UNARY);
888 siliconforks 92 Stream_printf(f, "%*s", indent, "");
889 siliconforks 2 if (node->pn_kid != NULL) {
890     instrument_expression(node->pn_kid, f);
891     }
892 siliconforks 92 Stream_write_string(f, ";\n");
893 siliconforks 2 break;
894     case TOK_COLON:
895     assert(node->pn_arity == PN_NAME);
896     /*
897     This one is tricky: can't output instrumentation between the label and the
898     statement it's supposed to label ...
899     */
900 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
901 siliconforks 2 print_string_atom(node->pn_atom, f);
902 siliconforks 92 Stream_write_string(f, ":\n");
903 siliconforks 2 /*
904     ... use output_statement instead of instrument_statement.
905     */
906 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
907 siliconforks 2 break;
908     default:
909     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
910     }
911     }
912    
913     /*
914     See <Statements> in jsparse.h.
915     TOK_FUNCTION is handled as a statement and as an expression.
916     TOK_EXPORT, TOK_IMPORT are not handled.
917     */
918 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
919 siliconforks 2 if (node->pn_type != TOK_LC) {
920 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
921     if (line > num_lines) {
922     fatal("%s: script contains more than 65,535 lines", file_id);
923     }
924    
925 siliconforks 2 /* the root node has line number 0 */
926     if (line != 0) {
927 siliconforks 92 Stream_printf(f, "%*s", indent, "");
928     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
929 siliconforks 2 lines[line - 1] = 1;
930     }
931     }
932 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
933 siliconforks 2 }
934    
935 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
936     const jschar * characters_end = characters + line_end;
937     const jschar * cp = characters + line_start;
938     const char * bp = prefix;
939     for (;;) {
940     if (*bp == '\0') {
941     return true;
942     }
943     else if (cp == characters_end) {
944     return false;
945     }
946     else if (*cp != *bp) {
947     return false;
948     }
949     bp++;
950     cp++;
951     }
952     }
953    
954 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
955     /* XXX - other Unicode space */
956     const jschar * end = characters + line_end;
957     for (const jschar * p = characters + line_start; p < end; p++) {
958     jschar c = *p;
959     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
960     continue;
961     }
962     else {
963     return false;
964     }
965     }
966     return true;
967     }
968    
969 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
970 siliconforks 2 file_id = id;
971    
972     /* scan the javascript */
973 siliconforks 179 JSTokenStream * token_stream = js_NewTokenStream(context, characters, num_characters, NULL, 1, NULL);
974 siliconforks 2 if (token_stream == NULL) {
975     fatal("cannot create token stream from file: %s", file_id);
976     }
977    
978     /* parse the javascript */
979     JSParseNode * node = js_ParseTokenStream(context, global, token_stream);
980     if (node == NULL) {
981     fatal("parse error in file: %s", file_id);
982     }
983 siliconforks 214 num_lines = node->pn_pos.end.lineno;
984 siliconforks 2 lines = xmalloc(num_lines);
985 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
986 siliconforks 2 lines[i] = 0;
987     }
988    
989 siliconforks 240 /* search code for conditionals */
990     exclusive_directives = xnew(bool, num_lines);
991     for (unsigned int i = 0; i < num_lines; i++) {
992     exclusive_directives[i] = false;
993 siliconforks 2 }
994    
995 siliconforks 157 bool has_conditionals = false;
996 siliconforks 240 struct IfDirective * if_directives = NULL;
997 siliconforks 157 size_t line_number = 0;
998     size_t i = 0;
999 siliconforks 176 while (i < num_characters) {
1000 siliconforks 240 if (line_number == UINT16_MAX) {
1001     fatal("%s: script has more than 65,535 lines", file_id);
1002     }
1003 siliconforks 157 line_number++;
1004     size_t line_start = i;
1005 siliconforks 190 jschar c;
1006     bool done = false;
1007     while (! done && i < num_characters) {
1008     c = characters[i];
1009     switch (c) {
1010     case '\r':
1011     case '\n':
1012     case 0x2028:
1013     case 0x2029:
1014     done = true;
1015     break;
1016     default:
1017     i++;
1018     }
1019 siliconforks 157 }
1020     size_t line_end = i;
1021 siliconforks 176 if (i < num_characters) {
1022 siliconforks 190 i++;
1023     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1024 siliconforks 157 i++;
1025     }
1026     }
1027 siliconforks 240
1028 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1029 siliconforks 240 has_conditionals = true;
1030    
1031     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1032     exclusive_directives[line_number - 1] = true;
1033 siliconforks 157 }
1034 siliconforks 240 else {
1035     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1036     if_directive->condition_start = characters + line_start + 16;
1037     if_directive->condition_end = characters + line_end;
1038     if_directive->start_line = line_number;
1039     if_directive->end_line = 0;
1040     if_directive->next = if_directives;
1041     if_directives = if_directive;
1042 siliconforks 190 }
1043 siliconforks 157 }
1044 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1045 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1046     if (p->end_line == 0) {
1047     p->end_line = line_number;
1048     break;
1049     }
1050     }
1051 siliconforks 157 }
1052     }
1053    
1054 siliconforks 240 /*
1055     An instrumented JavaScript file has 4 sections:
1056     1. initialization
1057     2. instrumented source code
1058     3. conditionals
1059     4. original source code
1060     */
1061    
1062     Stream * instrumented = Stream_new(0);
1063     instrument_statement(node, instrumented, 0, false);
1064    
1065     /* write line number info to the output */
1066     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1067     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1068     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1069     Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1070     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1071     for (int i = 0; i < num_lines; i++) {
1072     if (lines[i]) {
1073     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1074     }
1075     }
1076     Stream_write_string(output, "}\n");
1077     free(lines);
1078     lines = NULL;
1079     free(exclusive_directives);
1080     exclusive_directives = NULL;
1081    
1082     /* conditionals */
1083     if (has_conditionals) {
1084     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1085     }
1086    
1087     /* copy the instrumented source code to the output */
1088     Stream_write(output, instrumented->data, instrumented->length);
1089    
1090     /* conditionals */
1091     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1092     Stream_write_string(output, "if (!(");
1093     for (const jschar * p = if_directive->condition_start; p < if_directive->condition_end; p++) {
1094     jschar c = *p;
1095     if (c == '\t' || (32 <= c && c <= 126)) {
1096     Stream_write_char(output, c);
1097     }
1098     else {
1099     Stream_printf(output, "\\u%04x", c);
1100     }
1101     }
1102     Stream_write_string(output, ")) {\n");
1103     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1104     Stream_write_string(output, "}\n");
1105     }
1106    
1107     /* free */
1108     while (if_directives != NULL) {
1109     struct IfDirective * if_directive = if_directives;
1110     if_directives = if_directives->next;
1111     free(if_directive);
1112     }
1113    
1114 siliconforks 95 /* copy the original source to the output */
1115 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1116     jscoverage_write_source(id, characters, num_characters, output);
1117     Stream_printf(output, ";\n");
1118 siliconforks 95
1119 siliconforks 179 Stream_delete(instrumented);
1120    
1121     file_id = NULL;
1122     }
1123    
1124     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1125     Stream_write_string(output, "[");
1126     if (jscoverage_highlight) {
1127     Stream * highlighted_stream = Stream_new(num_characters);
1128     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1129     size_t i = 0;
1130     while (i < highlighted_stream->length) {
1131     if (i > 0) {
1132     Stream_write_char(output, ',');
1133     }
1134    
1135     Stream_write_char(output, '"');
1136     bool done = false;
1137     while (! done) {
1138     char c = highlighted_stream->data[i];
1139     switch (c) {
1140     case 0x8:
1141     /* backspace */
1142     Stream_write_string(output, "\\b");
1143     break;
1144     case 0x9:
1145     /* horizontal tab */
1146     Stream_write_string(output, "\\t");
1147     break;
1148     case 0xa:
1149     /* line feed (new line) */
1150     done = true;
1151     break;
1152     case 0xb:
1153     /* vertical tab */
1154     Stream_write_string(output, "\\v");
1155     break;
1156     case 0xc:
1157     /* form feed */
1158     Stream_write_string(output, "\\f");
1159     break;
1160     case 0xd:
1161     /* carriage return */
1162     done = true;
1163     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1164     i++;
1165     }
1166     break;
1167     case '"':
1168     Stream_write_string(output, "\\\"");
1169     break;
1170     case '\\':
1171     Stream_write_string(output, "\\\\");
1172     break;
1173     default:
1174     Stream_write_char(output, c);
1175     break;
1176     }
1177 siliconforks 95 i++;
1178 siliconforks 179 if (i >= highlighted_stream->length) {
1179     done = true;
1180 siliconforks 95 }
1181     }
1182 siliconforks 179 Stream_write_char(output, '"');
1183     }
1184     Stream_delete(highlighted_stream);
1185     }
1186     else {
1187     size_t i = 0;
1188     while (i < num_characters) {
1189     if (i > 0) {
1190     Stream_write_char(output, ',');
1191     }
1192    
1193     Stream_write_char(output, '"');
1194     bool done = false;
1195     while (! done) {
1196     jschar c = characters[i];
1197     switch (c) {
1198     case 0x8:
1199     /* backspace */
1200     Stream_write_string(output, "\\b");
1201     break;
1202     case 0x9:
1203     /* horizontal tab */
1204     Stream_write_string(output, "\\t");
1205     break;
1206     case 0xa:
1207     /* line feed (new line) */
1208     done = true;
1209     break;
1210     case 0xb:
1211     /* vertical tab */
1212     Stream_write_string(output, "\\v");
1213     break;
1214     case 0xc:
1215     /* form feed */
1216     Stream_write_string(output, "\\f");
1217     break;
1218     case 0xd:
1219     /* carriage return */
1220     done = true;
1221     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1222     i++;
1223     }
1224     break;
1225     case '"':
1226     Stream_write_string(output, "\\\"");
1227     break;
1228     case '\\':
1229     Stream_write_string(output, "\\\\");
1230     break;
1231     case '&':
1232     Stream_write_string(output, "&amp;");
1233     break;
1234     case '<':
1235     Stream_write_string(output, "&lt;");
1236     break;
1237     case '>':
1238     Stream_write_string(output, "&gt;");
1239     break;
1240     case 0x2028:
1241     case 0x2029:
1242     done = true;
1243     break;
1244     default:
1245     if (32 <= c && c <= 126) {
1246     Stream_write_char(output, c);
1247     }
1248     else {
1249     Stream_printf(output, "&#%d;", c);
1250     }
1251     break;
1252     }
1253 siliconforks 95 i++;
1254 siliconforks 179 if (i >= num_characters) {
1255     done = true;
1256     }
1257 siliconforks 95 }
1258 siliconforks 179 Stream_write_char(output, '"');
1259 siliconforks 95 }
1260     }
1261 siliconforks 179 Stream_write_string(output, "]");
1262 siliconforks 2 }
1263 siliconforks 116
1264     void jscoverage_copy_resources(const char * destination_directory) {
1265     copy_resource("jscoverage.html", destination_directory);
1266     copy_resource("jscoverage.css", destination_directory);
1267     copy_resource("jscoverage.js", destination_directory);
1268 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1269 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1270 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1271 siliconforks 116 }
1272    
1273     /*
1274     coverage reports
1275     */
1276    
1277     struct FileCoverageList {
1278     FileCoverage * file_coverage;
1279     struct FileCoverageList * next;
1280     };
1281    
1282     struct Coverage {
1283     JSHashTable * coverage_table;
1284     struct FileCoverageList * coverage_list;
1285     };
1286    
1287     static int compare_strings(const void * p1, const void * p2) {
1288     return strcmp(p1, p2) == 0;
1289     }
1290    
1291     Coverage * Coverage_new(void) {
1292     Coverage * result = xmalloc(sizeof(Coverage));
1293     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1294     if (result->coverage_table == NULL) {
1295     fatal("cannot create hash table");
1296     }
1297     result->coverage_list = NULL;
1298     return result;
1299     }
1300    
1301     void Coverage_delete(Coverage * coverage) {
1302     JS_HashTableDestroy(coverage->coverage_table);
1303     struct FileCoverageList * p = coverage->coverage_list;
1304     while (p != NULL) {
1305 siliconforks 179 free(p->file_coverage->coverage_lines);
1306     if (p->file_coverage->source_lines != NULL) {
1307     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1308     free(p->file_coverage->source_lines[i]);
1309     }
1310     free(p->file_coverage->source_lines);
1311     }
1312 siliconforks 116 free(p->file_coverage->id);
1313     free(p->file_coverage);
1314     struct FileCoverageList * q = p;
1315     p = p->next;
1316     free(q);
1317     }
1318     free(coverage);
1319     }
1320    
1321     struct EnumeratorArg {
1322     CoverageForeachFunction f;
1323     void * p;
1324     };
1325    
1326     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1327     struct EnumeratorArg * enumerator_arg = arg;
1328     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1329     return 0;
1330     }
1331    
1332     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1333     struct EnumeratorArg enumerator_arg;
1334     enumerator_arg.f = f;
1335     enumerator_arg.p = p;
1336     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1337     }
1338    
1339     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1340     jschar * base = js_InflateString(context, (char *) json, &length);
1341     if (base == NULL) {
1342     fatal("out of memory");
1343     }
1344    
1345     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1346     parenthesized_json[0] = '(';
1347     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1348     parenthesized_json[length + 1] = ')';
1349    
1350     JS_free(context, base);
1351    
1352     JSTokenStream * token_stream = js_NewTokenStream(context, parenthesized_json, length + 2, NULL, 1, NULL);
1353     if (token_stream == NULL) {
1354     fatal("cannot create token stream");
1355     }
1356    
1357     JSParseNode * root = js_ParseTokenStream(context, global, token_stream);
1358     free(parenthesized_json);
1359     if (root == NULL) {
1360     return -1;
1361     }
1362    
1363     /* root node must be TOK_LC */
1364     if (root->pn_type != TOK_LC) {
1365     return -1;
1366     }
1367     JSParseNode * semi = root->pn_u.list.head;
1368    
1369     /* the list must be TOK_SEMI and it must contain only one element */
1370     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1371     return -1;
1372     }
1373     JSParseNode * parenthesized = semi->pn_kid;
1374    
1375     /* this must be a parenthesized expression */
1376     if (parenthesized->pn_type != TOK_RP) {
1377     return -1;
1378     }
1379     JSParseNode * object = parenthesized->pn_kid;
1380    
1381     /* this must be an object literal */
1382     if (object->pn_type != TOK_RC) {
1383     return -1;
1384     }
1385    
1386     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1387     /* every element of this list must be TOK_COLON */
1388     if (p->pn_type != TOK_COLON) {
1389     return -1;
1390     }
1391    
1392     /* the key must be a string representing the file */
1393     JSParseNode * key = p->pn_left;
1394     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1395     return -1;
1396     }
1397     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1398    
1399     /* the value must be an object literal OR an array */
1400     JSParseNode * value = p->pn_right;
1401     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1402     return -1;
1403     }
1404    
1405     JSParseNode * array = NULL;
1406     JSParseNode * source = NULL;
1407     if (value->pn_type == TOK_RB) {
1408     /* an array */
1409     array = value;
1410     }
1411     else if (value->pn_type == TOK_RC) {
1412     /* an object literal */
1413     if (value->pn_count != 2) {
1414     return -1;
1415     }
1416     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1417     if (element->pn_type != TOK_COLON) {
1418     return -1;
1419     }
1420     JSParseNode * left = element->pn_left;
1421     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1422     return -1;
1423     }
1424     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1425     if (strcmp(s, "coverage") == 0) {
1426     array = element->pn_right;
1427     if (array->pn_type != TOK_RB) {
1428     return -1;
1429     }
1430     }
1431     else if (strcmp(s, "source") == 0) {
1432     source = element->pn_right;
1433 siliconforks 179 if (source->pn_type != TOK_RB) {
1434 siliconforks 116 return -1;
1435     }
1436     }
1437     else {
1438     return -1;
1439     }
1440     }
1441     }
1442     else {
1443     return -1;
1444     }
1445    
1446     if (array == NULL) {
1447     return -1;
1448     }
1449    
1450     /* look up the file in the coverage table */
1451     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1452     if (file_coverage == NULL) {
1453     /* not there: create a new one */
1454     char * id = xstrdup(id_bytes);
1455     file_coverage = xmalloc(sizeof(FileCoverage));
1456     file_coverage->id = id;
1457 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1458     file_coverage->coverage_lines = xnew(int, array->pn_count);
1459 siliconforks 245 file_coverage->source_lines = NULL;
1460 siliconforks 116
1461     /* set coverage for all lines */
1462     uint32 i = 0;
1463     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1464     if (element->pn_type == TOK_NUMBER) {
1465 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1466 siliconforks 116 }
1467     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1468 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1469 siliconforks 116 }
1470     else {
1471     return -1;
1472     }
1473     }
1474     assert(i == array->pn_count);
1475    
1476     /* add to the hash table */
1477     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1478     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1479     coverage_list->file_coverage = file_coverage;
1480     coverage_list->next = coverage->coverage_list;
1481     coverage->coverage_list = coverage_list;
1482     }
1483     else {
1484     /* sanity check */
1485     assert(strcmp(file_coverage->id, id_bytes) == 0);
1486 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1487 siliconforks 116 return -2;
1488     }
1489    
1490     /* merge the coverage */
1491     uint32 i = 0;
1492     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1493     if (element->pn_type == TOK_NUMBER) {
1494 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1495 siliconforks 116 return -2;
1496     }
1497 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1498 siliconforks 116 }
1499     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1500 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1501 siliconforks 116 return -2;
1502     }
1503     }
1504     else {
1505     return -1;
1506     }
1507     }
1508     assert(i == array->pn_count);
1509 siliconforks 245 }
1510 siliconforks 116
1511 siliconforks 245 /* if this JSON file has source, use it */
1512     if (file_coverage->source_lines == NULL && source != NULL) {
1513     file_coverage->num_source_lines = source->pn_count;
1514     file_coverage->source_lines = xnew(char *, source->pn_count);
1515     uint32 i = 0;
1516     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1517     if (element->pn_type != TOK_STRING) {
1518     return -1;
1519 siliconforks 179 }
1520 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1521 siliconforks 116 }
1522 siliconforks 245 assert(i == source->pn_count);
1523 siliconforks 116 }
1524     }
1525    
1526     return 0;
1527     }

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