/[jscoverage]/trunk/instrument-js.c
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Revision 346 - (show annotations)
Fri Oct 24 16:16:24 2008 UTC (10 years, 8 months ago) by siliconforks
File MIME type: text/plain
File size: 50660 byte(s)
Add support for generator expressions from JS 1.8.
1 /*
2 instrument-js.c - JavaScript instrumentation routines
3 Copyright (C) 2007, 2008 siliconforks.com
4
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 #include <config.h>
21
22 #include "instrument-js.h"
23
24 #include <assert.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include <jsapi.h>
29 #include <jsarena.h>
30 #include <jsatom.h>
31 #include <jsexn.h>
32 #include <jsfun.h>
33 #include <jsinterp.h>
34 #include <jsiter.h>
35 #include <jsparse.h>
36 #include <jsregexp.h>
37 #include <jsscope.h>
38 #include <jsstr.h>
39
40 #include "encoding.h"
41 #include "global.h"
42 #include "highlight.h"
43 #include "resource-manager.h"
44 #include "util.h"
45
46 struct IfDirective {
47 const jschar * condition_start;
48 const jschar * condition_end;
49 uint16_t start_line;
50 uint16_t end_line;
51 struct IfDirective * next;
52 };
53
54 static bool * exclusive_directives = NULL;
55
56 static JSRuntime * runtime = NULL;
57 static JSContext * context = NULL;
58 static JSObject * global = NULL;
59 static JSVersion js_version = JSVERSION_ECMA_3;
60
61 /*
62 JSParseNode objects store line numbers starting from 1.
63 The lines array stores line numbers starting from 0.
64 */
65 static const char * file_id = NULL;
66 static char * lines = NULL;
67 static uint16_t num_lines = 0;
68
69 void jscoverage_set_js_version(const char * version) {
70 js_version = atoi(version);
71 }
72
73 void jscoverage_init(void) {
74 runtime = JS_NewRuntime(8L * 1024L * 1024L);
75 if (runtime == NULL) {
76 fatal("cannot create runtime");
77 }
78
79 context = JS_NewContext(runtime, 8192);
80 if (context == NULL) {
81 fatal("cannot create context");
82 }
83
84 JS_SetVersion(context, js_version);
85
86 global = JS_NewObject(context, NULL, NULL, NULL);
87 if (global == NULL) {
88 fatal("cannot create global object");
89 }
90
91 if (! JS_InitStandardClasses(context, global)) {
92 fatal("cannot initialize standard classes");
93 }
94 }
95
96 void jscoverage_cleanup(void) {
97 JS_DestroyContext(context);
98 JS_DestroyRuntime(runtime);
99 }
100
101 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
102 for (size_t i = 0; i < num_characters; i++) {
103 jschar c = characters[i];
104 /*
105 XXX does not handle no-break space, other unicode "space separator"
106 */
107 switch (c) {
108 case 0x9:
109 case 0xB:
110 case 0xC:
111 Stream_write_char(f, c);
112 break;
113 default:
114 if (32 <= c && c <= 126) {
115 Stream_write_char(f, c);
116 }
117 else {
118 Stream_printf(f, "\\u%04x", c);
119 }
120 break;
121 }
122 }
123 }
124
125 static void print_string(JSString * s, Stream * f) {
126 size_t length = JSSTRING_LENGTH(s);
127 jschar * characters = JSSTRING_CHARS(s);
128 for (size_t i = 0; i < length; i++) {
129 jschar c = characters[i];
130 if (32 <= c && c <= 126) {
131 switch (c) {
132 case '"':
133 Stream_write_string(f, "\\\"");
134 break;
135 /*
136 case '\'':
137 Stream_write_string(f, "\\'");
138 break;
139 */
140 case '\\':
141 Stream_write_string(f, "\\\\");
142 break;
143 default:
144 Stream_write_char(f, c);
145 break;
146 }
147 }
148 else {
149 switch (c) {
150 case 0x8:
151 Stream_write_string(f, "\\b");
152 break;
153 case 0x9:
154 Stream_write_string(f, "\\t");
155 break;
156 case 0xa:
157 Stream_write_string(f, "\\n");
158 break;
159 /* IE doesn't support this */
160 /*
161 case 0xb:
162 Stream_write_string(f, "\\v");
163 break;
164 */
165 case 0xc:
166 Stream_write_string(f, "\\f");
167 break;
168 case 0xd:
169 Stream_write_string(f, "\\r");
170 break;
171 default:
172 Stream_printf(f, "\\u%04x", c);
173 break;
174 }
175 }
176 }
177 }
178
179 static void print_string_atom(JSAtom * atom, Stream * f) {
180 assert(ATOM_IS_STRING(atom));
181 JSString * s = ATOM_TO_STRING(atom);
182 print_string(s, f);
183 }
184
185 static void print_regex(jsval value, Stream * f) {
186 assert(JSVAL_IS_STRING(value));
187 JSString * s = JSVAL_TO_STRING(value);
188 size_t length = JSSTRING_LENGTH(s);
189 jschar * characters = JSSTRING_CHARS(s);
190 for (size_t i = 0; i < length; i++) {
191 jschar c = characters[i];
192 if (32 <= c && c <= 126) {
193 Stream_write_char(f, c);
194 }
195 else {
196 Stream_printf(f, "\\u%04x", c);
197 }
198 }
199 }
200
201 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
202 assert(ATOM_IS_STRING(atom));
203 JSString * s = ATOM_TO_STRING(atom);
204 Stream_write_char(f, '"');
205 print_string(s, f);
206 Stream_write_char(f, '"');
207 }
208
209 static const char * get_op(uint8 op) {
210 switch(op) {
211 case JSOP_OR:
212 return "||";
213 case JSOP_AND:
214 return "&&";
215 case JSOP_BITOR:
216 return "|";
217 case JSOP_BITXOR:
218 return "^";
219 case JSOP_BITAND:
220 return "&";
221 case JSOP_EQ:
222 return "==";
223 case JSOP_NE:
224 return "!=";
225 case JSOP_STRICTEQ:
226 return "===";
227 case JSOP_STRICTNE:
228 return "!==";
229 case JSOP_LT:
230 return "<";
231 case JSOP_LE:
232 return "<=";
233 case JSOP_GT:
234 return ">";
235 case JSOP_GE:
236 return ">=";
237 case JSOP_LSH:
238 return "<<";
239 case JSOP_RSH:
240 return ">>";
241 case JSOP_URSH:
242 return ">>>";
243 case JSOP_ADD:
244 return "+";
245 case JSOP_SUB:
246 return "-";
247 case JSOP_MUL:
248 return "*";
249 case JSOP_DIV:
250 return "/";
251 case JSOP_MOD:
252 return "%";
253 default:
254 abort();
255 }
256 }
257
258 static void instrument_expression(JSParseNode * node, Stream * f);
259 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
260 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
261
262 enum FunctionType {
263 FUNCTION_NORMAL,
264 FUNCTION_GETTER_OR_SETTER
265 };
266
267 static void output_for_in(JSParseNode * node, Stream * f) {
268 assert(node->pn_type == TOK_FOR);
269 assert(node->pn_arity == PN_BINARY);
270 Stream_write_string(f, "for ");
271 if (node->pn_iflags & JSITER_FOREACH) {
272 Stream_write_string(f, "each ");
273 }
274 Stream_write_char(f, '(');
275 instrument_expression(node->pn_left, f);
276 Stream_write_char(f, ')');
277 }
278
279 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
280 assert(node->pn_type == TOK_FUNCTION);
281 assert(node->pn_arity == PN_FUNC);
282 JSObject * object = node->pn_funpob->object;
283 assert(JS_ObjectIsFunction(context, object));
284 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
285 assert(function);
286 assert(object == &function->object);
287 Stream_printf(f, "%*s", indent, "");
288 if (type == FUNCTION_NORMAL) {
289 Stream_write_string(f, "function");
290 }
291
292 /* function name */
293 if (function->atom) {
294 Stream_write_char(f, ' ');
295 print_string_atom(function->atom, f);
296 }
297
298 /*
299 function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
300 js_DecompileFunction in jsopcode.cpp
301 */
302 Stream_write_string(f, "(");
303 JSArenaPool pool;
304 JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
305 jsuword * local_names = NULL;
306 if (JS_GET_LOCAL_NAME_COUNT(function)) {
307 local_names = js_GetLocalNameArray(context, function, &pool);
308 if (local_names == NULL) {
309 fatal("out of memory");
310 }
311 }
312 for (int i = 0; i < function->nargs; i++) {
313 if (i > 0) {
314 Stream_write_string(f, ", ");
315 }
316 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
317 print_string_atom(param, f);
318 }
319 JS_FinishArenaPool(&pool);
320 Stream_write_string(f, ") {\n");
321
322 /* function body */
323 if (function->flags & JSFUN_EXPR_CLOSURE) {
324 /* expression closure */
325 output_statement(node->pn_body, f, indent + 2, false);
326 }
327 else {
328 instrument_statement(node->pn_body, f, indent + 2, false);
329 }
330
331 Stream_write_string(f, "}\n");
332 }
333
334 static void instrument_function_call(JSParseNode * node, Stream * f) {
335 if (node->pn_head->pn_type == TOK_FUNCTION) {
336 /* it's a generator expression */
337 JSParseNode * function_node = node->pn_head;
338 JSParseNode * lexical_scope_node = function_node->pn_body;
339 assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE);
340 assert(lexical_scope_node->pn_arity == PN_NAME);
341 JSParseNode * for_node = lexical_scope_node->pn_body;
342 assert(for_node->pn_type == TOK_FOR);
343 assert(for_node->pn_arity == PN_BINARY);
344 JSParseNode * if_node = NULL;
345 JSParseNode * semi_node;
346 switch (for_node->pn_right->pn_type) {
347 case TOK_SEMI:
348 semi_node = for_node->pn_right;
349 break;
350 case TOK_IF:
351 if_node = for_node->pn_right;
352 assert(if_node->pn_arity == PN_TERNARY);
353 semi_node = if_node->pn_kid2;
354 assert(semi_node->pn_type == TOK_SEMI);
355 break;
356 default:
357 abort();
358 break;
359 }
360 assert(semi_node->pn_arity == PN_UNARY);
361 JSParseNode * yield_node = semi_node->pn_kid;
362 assert(yield_node->pn_type == TOK_YIELD);
363 Stream_write_char(f, '(');
364 instrument_expression(yield_node->pn_kid, f);
365 Stream_write_char(f, ' ');
366 output_for_in(for_node, f);
367 if (if_node) {
368 Stream_write_string(f, " if (");
369 instrument_expression(if_node->pn_kid1, f);
370 Stream_write_char(f, ')');
371 }
372 Stream_write_char(f, ')');
373 }
374 else {
375 instrument_expression(node->pn_head, f);
376 Stream_write_char(f, '(');
377 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
378 if (p != node->pn_head->pn_next) {
379 Stream_write_string(f, ", ");
380 }
381 instrument_expression(p, f);
382 }
383 Stream_write_char(f, ')');
384 }
385 }
386
387 static void instrument_declarations(JSParseNode * list, Stream * f) {
388 assert(list->pn_arity == PN_LIST);
389 for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
390 switch (p->pn_type) {
391 case TOK_NAME:
392 assert(p->pn_arity == PN_NAME);
393 if (p != list->pn_head) {
394 Stream_write_string(f, ", ");
395 }
396 print_string_atom(p->pn_atom, f);
397 if (p->pn_expr != NULL) {
398 Stream_write_string(f, " = ");
399 instrument_expression(p->pn_expr, f);
400 }
401 break;
402 case TOK_ASSIGN:
403 case TOK_RB:
404 case TOK_RC:
405 /* destructuring */
406 instrument_expression(p, f);
407 break;
408 default:
409 abort();
410 break;
411 }
412 }
413 }
414
415 /*
416 See <Expressions> in jsparse.h.
417 TOK_FUNCTION is handled as a statement and as an expression.
418 TOK_DBLDOT is not handled (XML op).
419 TOK_DEFSHARP and TOK_USESHARP are not handled.
420 TOK_ANYNAME is not handled (XML op).
421 TOK_AT is not handled (XML op).
422 TOK_DBLCOLON is not handled.
423 TOK_XML* are not handled.
424 There seem to be some undocumented expressions:
425 TOK_INSTANCEOF binary
426 TOK_IN binary
427 */
428 static void instrument_expression(JSParseNode * node, Stream * f) {
429 switch (node->pn_type) {
430 case TOK_FUNCTION:
431 instrument_function(node, f, 0, FUNCTION_NORMAL);
432 break;
433 case TOK_COMMA:
434 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
435 if (p != node->pn_head) {
436 Stream_write_string(f, ", ");
437 }
438 instrument_expression(p, f);
439 }
440 break;
441 case TOK_ASSIGN:
442 instrument_expression(node->pn_left, f);
443 Stream_write_char(f, ' ');
444 switch (node->pn_op) {
445 case JSOP_ADD:
446 case JSOP_SUB:
447 case JSOP_MUL:
448 case JSOP_MOD:
449 case JSOP_LSH:
450 case JSOP_RSH:
451 case JSOP_URSH:
452 case JSOP_BITAND:
453 case JSOP_BITOR:
454 case JSOP_BITXOR:
455 case JSOP_DIV:
456 Stream_printf(f, "%s", get_op(node->pn_op));
457 break;
458 default:
459 /* do nothing - it must be a simple assignment */
460 break;
461 }
462 Stream_write_string(f, "= ");
463 instrument_expression(node->pn_right, f);
464 break;
465 case TOK_HOOK:
466 instrument_expression(node->pn_kid1, f);
467 Stream_write_string(f, "? ");
468 instrument_expression(node->pn_kid2, f);
469 Stream_write_string(f, ": ");
470 instrument_expression(node->pn_kid3, f);
471 break;
472 case TOK_OR:
473 case TOK_AND:
474 case TOK_BITOR:
475 case TOK_BITXOR:
476 case TOK_BITAND:
477 case TOK_EQOP:
478 case TOK_RELOP:
479 case TOK_SHOP:
480 case TOK_PLUS:
481 case TOK_MINUS:
482 case TOK_STAR:
483 case TOK_DIVOP:
484 switch (node->pn_arity) {
485 case PN_BINARY:
486 instrument_expression(node->pn_left, f);
487 Stream_printf(f, " %s ", get_op(node->pn_op));
488 instrument_expression(node->pn_right, f);
489 break;
490 case PN_LIST:
491 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
492 if (p != node->pn_head) {
493 Stream_printf(f, " %s ", get_op(node->pn_op));
494 }
495 instrument_expression(p, f);
496 }
497 break;
498 default:
499 abort();
500 }
501 break;
502 case TOK_UNARYOP:
503 switch (node->pn_op) {
504 case JSOP_NEG:
505 Stream_write_char(f, '-');
506 instrument_expression(node->pn_kid, f);
507 break;
508 case JSOP_POS:
509 Stream_write_char(f, '+');
510 instrument_expression(node->pn_kid, f);
511 break;
512 case JSOP_NOT:
513 Stream_write_char(f, '!');
514 instrument_expression(node->pn_kid, f);
515 break;
516 case JSOP_BITNOT:
517 Stream_write_char(f, '~');
518 instrument_expression(node->pn_kid, f);
519 break;
520 case JSOP_TYPEOF:
521 Stream_write_string(f, "typeof ");
522 instrument_expression(node->pn_kid, f);
523 break;
524 case JSOP_VOID:
525 Stream_write_string(f, "void ");
526 instrument_expression(node->pn_kid, f);
527 break;
528 default:
529 abort();
530 break;
531 }
532 break;
533 case TOK_INC:
534 case TOK_DEC:
535 /*
536 This is not documented, but node->pn_op tells whether it is pre- or post-increment.
537 */
538 switch (node->pn_op) {
539 case JSOP_INCNAME:
540 case JSOP_INCPROP:
541 case JSOP_INCELEM:
542 Stream_write_string(f, "++");
543 instrument_expression(node->pn_kid, f);
544 break;
545 case JSOP_DECNAME:
546 case JSOP_DECPROP:
547 case JSOP_DECELEM:
548 Stream_write_string(f, "--");
549 instrument_expression(node->pn_kid, f);
550 break;
551 case JSOP_NAMEINC:
552 case JSOP_PROPINC:
553 case JSOP_ELEMINC:
554 instrument_expression(node->pn_kid, f);
555 Stream_write_string(f, "++");
556 break;
557 case JSOP_NAMEDEC:
558 case JSOP_PROPDEC:
559 case JSOP_ELEMDEC:
560 instrument_expression(node->pn_kid, f);
561 Stream_write_string(f, "--");
562 break;
563 default:
564 abort();
565 break;
566 }
567 break;
568 case TOK_NEW:
569 Stream_write_string(f, "new ");
570 instrument_function_call(node, f);
571 break;
572 case TOK_DELETE:
573 Stream_write_string(f, "delete ");
574 instrument_expression(node->pn_kid, f);
575 break;
576 case TOK_DOT:
577 /*
578 This may have originally been x['foo-bar']. Because the string 'foo-bar'
579 contains illegal characters, we have to use the subscript syntax instead of
580 the dot syntax.
581 */
582 instrument_expression(node->pn_expr, f);
583 assert(ATOM_IS_STRING(node->pn_atom));
584 {
585 JSString * s = ATOM_TO_STRING(node->pn_atom);
586 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
587 if (! is_keyword && js_IsIdentifier(s)) {
588 Stream_write_char(f, '.');
589 print_string_atom(node->pn_atom, f);
590 }
591 else {
592 Stream_write_char(f, '[');
593 print_quoted_string_atom(node->pn_atom, f);
594 Stream_write_char(f, ']');
595 }
596 }
597 break;
598 case TOK_LB:
599 instrument_expression(node->pn_left, f);
600 Stream_write_char(f, '[');
601 instrument_expression(node->pn_right, f);
602 Stream_write_char(f, ']');
603 break;
604 case TOK_LP:
605 instrument_function_call(node, f);
606 break;
607 case TOK_RB:
608 Stream_write_char(f, '[');
609 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
610 if (p != node->pn_head) {
611 Stream_write_string(f, ", ");
612 }
613 /* TOK_COMMA is a special case: a hole in the array */
614 if (p->pn_type != TOK_COMMA) {
615 instrument_expression(p, f);
616 }
617 }
618 if (node->pn_extra == PNX_ENDCOMMA) {
619 Stream_write_char(f, ',');
620 }
621 Stream_write_char(f, ']');
622 break;
623 case TOK_RC:
624 Stream_write_char(f, '{');
625 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
626 assert(p->pn_type == TOK_COLON);
627 if (p != node->pn_head) {
628 Stream_write_string(f, ", ");
629 }
630
631 /* check whether this is a getter or setter */
632 switch (p->pn_op) {
633 case JSOP_GETTER:
634 case JSOP_SETTER:
635 if (p->pn_op == JSOP_GETTER) {
636 Stream_write_string(f, "get ");
637 }
638 else {
639 Stream_write_string(f, "set ");
640 }
641 instrument_expression(p->pn_left, f);
642 if (p->pn_right->pn_type != TOK_FUNCTION) {
643 fatal("parse error: expected function");
644 }
645 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
646 break;
647 default:
648 instrument_expression(p->pn_left, f);
649 Stream_write_string(f, ": ");
650 instrument_expression(p->pn_right, f);
651 break;
652 }
653 }
654 Stream_write_char(f, '}');
655 break;
656 case TOK_RP:
657 Stream_write_char(f, '(');
658 instrument_expression(node->pn_kid, f);
659 Stream_write_char(f, ')');
660 break;
661 case TOK_NAME:
662 print_string_atom(node->pn_atom, f);
663 break;
664 case TOK_STRING:
665 print_quoted_string_atom(node->pn_atom, f);
666 break;
667 case TOK_REGEXP:
668 assert(node->pn_op == JSOP_REGEXP);
669 {
670 JSObject * object = node->pn_pob->object;
671 jsval result;
672 js_regexp_toString(context, object, &result);
673 print_regex(result, f);
674 }
675 break;
676 case TOK_NUMBER:
677 /*
678 A 64-bit IEEE 754 floating point number has a 52-bit fraction.
679 2^(-52) = 2.22 x 10^(-16)
680 Thus there are 16 significant digits.
681 To keep the output simple, special-case zero.
682 */
683 if (node->pn_dval == 0.0) {
684 Stream_write_string(f, "0");
685 }
686 else {
687 Stream_printf(f, "%.15g", node->pn_dval);
688 }
689 break;
690 case TOK_PRIMARY:
691 switch (node->pn_op) {
692 case JSOP_TRUE:
693 Stream_write_string(f, "true");
694 break;
695 case JSOP_FALSE:
696 Stream_write_string(f, "false");
697 break;
698 case JSOP_NULL:
699 Stream_write_string(f, "null");
700 break;
701 case JSOP_THIS:
702 Stream_write_string(f, "this");
703 break;
704 /* jsscan.h mentions `super' ??? */
705 default:
706 abort();
707 }
708 break;
709 case TOK_INSTANCEOF:
710 instrument_expression(node->pn_left, f);
711 Stream_write_string(f, " instanceof ");
712 instrument_expression(node->pn_right, f);
713 break;
714 case TOK_IN:
715 instrument_expression(node->pn_left, f);
716 Stream_write_string(f, " in ");
717 instrument_expression(node->pn_right, f);
718 break;
719 case TOK_LEXICALSCOPE:
720 assert(node->pn_arity == PN_NAME);
721 assert(node->pn_expr->pn_type == TOK_LET);
722 assert(node->pn_expr->pn_arity == PN_BINARY);
723 Stream_write_string(f, "let(");
724 assert(node->pn_expr->pn_left->pn_type == TOK_LP);
725 assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
726 instrument_declarations(node->pn_expr->pn_left, f);
727 Stream_write_string(f, ") ");
728 instrument_expression(node->pn_expr->pn_right, f);
729 break;
730 case TOK_YIELD:
731 assert(node->pn_arity == PN_UNARY);
732 Stream_write_string(f, "yield ");
733 instrument_expression(node->pn_kid, f);
734 break;
735 case TOK_ARRAYCOMP:
736 assert(node->pn_arity == PN_LIST);
737 {
738 JSParseNode * block_node;
739 switch (node->pn_count) {
740 case 1:
741 block_node = node->pn_head;
742 break;
743 case 2:
744 block_node = node->pn_head->pn_next;
745 break;
746 default:
747 abort();
748 break;
749 }
750 assert(block_node->pn_type == TOK_LEXICALSCOPE);
751 assert(block_node->pn_arity == PN_NAME);
752 JSParseNode * for_node = block_node->pn_expr;
753 assert(for_node->pn_type == TOK_FOR);
754 assert(for_node->pn_arity == PN_BINARY);
755 JSParseNode * if_node = NULL;
756 JSParseNode * push_node;
757 switch (for_node->pn_right->pn_type) {
758 case TOK_ARRAYPUSH:
759 push_node = for_node->pn_right;
760 assert(push_node->pn_arity == PN_UNARY);
761 break;
762 case TOK_IF:
763 if_node = for_node->pn_right;
764 assert(if_node->pn_arity == PN_TERNARY);
765 push_node = if_node->pn_kid2;
766 break;
767 default:
768 abort();
769 break;
770 }
771 Stream_write_char(f, '[');
772 instrument_expression(push_node->pn_kid, f);
773 Stream_write_char(f, ' ');
774 output_for_in(for_node, f);
775 if (if_node) {
776 Stream_write_string(f, " if (");
777 instrument_expression(if_node->pn_kid1, f);
778 Stream_write_char(f, ')');
779 }
780 Stream_write_char(f, ']');
781 }
782 break;
783 case TOK_VAR:
784 assert(node->pn_arity == PN_LIST);
785 Stream_write_string(f, "var ");
786 instrument_declarations(node, f);
787 break;
788 case TOK_LET:
789 assert(node->pn_arity == PN_LIST);
790 Stream_write_string(f, "let ");
791 instrument_declarations(node, f);
792 break;
793 default:
794 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
795 }
796 }
797
798 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
799 switch (node->pn_type) {
800 case TOK_FUNCTION:
801 instrument_function(node, f, indent, FUNCTION_NORMAL);
802 break;
803 case TOK_LC:
804 assert(node->pn_arity == PN_LIST);
805 /*
806 Stream_write_string(f, "{\n");
807 */
808 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
809 instrument_statement(p, f, indent, false);
810 }
811 /*
812 Stream_printf(f, "%*s", indent, "");
813 Stream_write_string(f, "}\n");
814 */
815 break;
816 case TOK_IF:
817 {
818 assert(node->pn_arity == PN_TERNARY);
819
820 uint16_t line = node->pn_pos.begin.lineno;
821 if (! is_jscoverage_if) {
822 if (line > num_lines) {
823 fatal("%s: script contains more than 65,535 lines", file_id);
824 }
825 if (line >= 2 && exclusive_directives[line - 2]) {
826 is_jscoverage_if = true;
827 }
828 }
829
830 Stream_printf(f, "%*s", indent, "");
831 Stream_write_string(f, "if (");
832 instrument_expression(node->pn_kid1, f);
833 Stream_write_string(f, ") {\n");
834 if (is_jscoverage_if && node->pn_kid3) {
835 uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
836 uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
837 Stream_printf(f, "%*s", indent + 2, "");
838 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
839 }
840 instrument_statement(node->pn_kid2, f, indent + 2, false);
841 Stream_printf(f, "%*s", indent, "");
842 Stream_write_string(f, "}\n");
843
844 if (node->pn_kid3 || is_jscoverage_if) {
845 Stream_printf(f, "%*s", indent, "");
846 Stream_write_string(f, "else {\n");
847
848 if (is_jscoverage_if) {
849 uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
850 uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
851 Stream_printf(f, "%*s", indent + 2, "");
852 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
853 }
854
855 if (node->pn_kid3) {
856 instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
857 }
858
859 Stream_printf(f, "%*s", indent, "");
860 Stream_write_string(f, "}\n");
861 }
862
863 break;
864 }
865 case TOK_SWITCH:
866 assert(node->pn_arity == PN_BINARY);
867 Stream_printf(f, "%*s", indent, "");
868 Stream_write_string(f, "switch (");
869 instrument_expression(node->pn_left, f);
870 Stream_write_string(f, ") {\n");
871 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
872 Stream_printf(f, "%*s", indent, "");
873 switch (p->pn_type) {
874 case TOK_CASE:
875 Stream_write_string(f, "case ");
876 instrument_expression(p->pn_left, f);
877 Stream_write_string(f, ":\n");
878 break;
879 case TOK_DEFAULT:
880 Stream_write_string(f, "default:\n");
881 break;
882 default:
883 abort();
884 break;
885 }
886 instrument_statement(p->pn_right, f, indent + 2, false);
887 }
888 Stream_printf(f, "%*s", indent, "");
889 Stream_write_string(f, "}\n");
890 break;
891 case TOK_CASE:
892 case TOK_DEFAULT:
893 abort();
894 break;
895 case TOK_WHILE:
896 assert(node->pn_arity == PN_BINARY);
897 Stream_printf(f, "%*s", indent, "");
898 Stream_write_string(f, "while (");
899 instrument_expression(node->pn_left, f);
900 Stream_write_string(f, ") {\n");
901 instrument_statement(node->pn_right, f, indent + 2, false);
902 Stream_write_string(f, "}\n");
903 break;
904 case TOK_DO:
905 assert(node->pn_arity == PN_BINARY);
906 Stream_printf(f, "%*s", indent, "");
907 Stream_write_string(f, "do {\n");
908 instrument_statement(node->pn_left, f, indent + 2, false);
909 Stream_write_string(f, "}\n");
910 Stream_printf(f, "%*s", indent, "");
911 Stream_write_string(f, "while (");
912 instrument_expression(node->pn_right, f);
913 Stream_write_string(f, ");\n");
914 break;
915 case TOK_FOR:
916 assert(node->pn_arity == PN_BINARY);
917 Stream_printf(f, "%*s", indent, "");
918 switch (node->pn_left->pn_type) {
919 case TOK_IN:
920 /* for/in */
921 assert(node->pn_left->pn_arity == PN_BINARY);
922 output_for_in(node, f);
923 break;
924 case TOK_RESERVED:
925 /* for (;;) */
926 assert(node->pn_left->pn_arity == PN_TERNARY);
927 Stream_write_string(f, "for (");
928 if (node->pn_left->pn_kid1) {
929 instrument_expression(node->pn_left->pn_kid1, f);
930 }
931 Stream_write_string(f, ";");
932 if (node->pn_left->pn_kid2) {
933 Stream_write_char(f, ' ');
934 instrument_expression(node->pn_left->pn_kid2, f);
935 }
936 Stream_write_string(f, ";");
937 if (node->pn_left->pn_kid3) {
938 Stream_write_char(f, ' ');
939 instrument_expression(node->pn_left->pn_kid3, f);
940 }
941 Stream_write_char(f, ')');
942 break;
943 default:
944 abort();
945 break;
946 }
947 Stream_write_string(f, " {\n");
948 instrument_statement(node->pn_right, f, indent + 2, false);
949 Stream_write_string(f, "}\n");
950 break;
951 case TOK_THROW:
952 assert(node->pn_arity == PN_UNARY);
953 Stream_printf(f, "%*s", indent, "");
954 Stream_write_string(f, "throw ");
955 instrument_expression(node->pn_u.unary.kid, f);
956 Stream_write_string(f, ";\n");
957 break;
958 case TOK_TRY:
959 Stream_printf(f, "%*s", indent, "");
960 Stream_write_string(f, "try {\n");
961 instrument_statement(node->pn_kid1, f, indent + 2, false);
962 Stream_printf(f, "%*s", indent, "");
963 Stream_write_string(f, "}\n");
964 if (node->pn_kid2) {
965 assert(node->pn_kid2->pn_type == TOK_RESERVED);
966 for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
967 assert(scope->pn_type == TOK_LEXICALSCOPE);
968 JSParseNode * catch = scope->pn_expr;
969 assert(catch->pn_type == TOK_CATCH);
970 Stream_printf(f, "%*s", indent, "");
971 Stream_write_string(f, "catch (");
972 /* this may not be a name - destructuring assignment */
973 /*
974 assert(catch->pn_kid1->pn_arity == PN_NAME);
975 print_string_atom(catch->pn_kid1->pn_atom, f);
976 */
977 instrument_expression(catch->pn_kid1, f);
978 if (catch->pn_kid2) {
979 Stream_write_string(f, " if ");
980 instrument_expression(catch->pn_kid2, f);
981 }
982 Stream_write_string(f, ") {\n");
983 instrument_statement(catch->pn_kid3, f, indent + 2, false);
984 Stream_printf(f, "%*s", indent, "");
985 Stream_write_string(f, "}\n");
986 }
987 }
988 if (node->pn_kid3) {
989 Stream_printf(f, "%*s", indent, "");
990 Stream_write_string(f, "finally {\n");
991 instrument_statement(node->pn_kid3, f, indent + 2, false);
992 Stream_printf(f, "%*s", indent, "");
993 Stream_write_string(f, "}\n");
994 }
995 break;
996 case TOK_CATCH:
997 abort();
998 break;
999 case TOK_BREAK:
1000 case TOK_CONTINUE:
1001 assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1002 Stream_printf(f, "%*s", indent, "");
1003 Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1004 JSAtom * atom = node->pn_u.name.atom;
1005 if (atom != NULL) {
1006 Stream_write_char(f, ' ');
1007 print_string_atom(node->pn_atom, f);
1008 }
1009 Stream_write_string(f, ";\n");
1010 break;
1011 case TOK_WITH:
1012 assert(node->pn_arity == PN_BINARY);
1013 Stream_printf(f, "%*s", indent, "");
1014 Stream_write_string(f, "with (");
1015 instrument_expression(node->pn_left, f);
1016 Stream_write_string(f, ") {\n");
1017 instrument_statement(node->pn_right, f, indent + 2, false);
1018 Stream_printf(f, "%*s", indent, "");
1019 Stream_write_string(f, "}\n");
1020 break;
1021 case TOK_VAR:
1022 Stream_printf(f, "%*s", indent, "");
1023 instrument_expression(node, f);
1024 Stream_write_string(f, ";\n");
1025 break;
1026 case TOK_RETURN:
1027 assert(node->pn_arity == PN_UNARY);
1028 Stream_printf(f, "%*s", indent, "");
1029 Stream_write_string(f, "return");
1030 if (node->pn_kid != NULL) {
1031 Stream_write_char(f, ' ');
1032 instrument_expression(node->pn_kid, f);
1033 }
1034 Stream_write_string(f, ";\n");
1035 break;
1036 case TOK_SEMI:
1037 assert(node->pn_arity == PN_UNARY);
1038 Stream_printf(f, "%*s", indent, "");
1039 if (node->pn_kid != NULL) {
1040 instrument_expression(node->pn_kid, f);
1041 }
1042 Stream_write_string(f, ";\n");
1043 break;
1044 case TOK_COLON:
1045 assert(node->pn_arity == PN_NAME);
1046 /*
1047 This one is tricky: can't output instrumentation between the label and the
1048 statement it's supposed to label ...
1049 */
1050 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1051 print_string_atom(node->pn_atom, f);
1052 Stream_write_string(f, ":\n");
1053 /*
1054 ... use output_statement instead of instrument_statement.
1055 */
1056 output_statement(node->pn_expr, f, indent, false);
1057 break;
1058 case TOK_LEXICALSCOPE:
1059 /* let statement */
1060 assert(node->pn_arity == PN_NAME);
1061 switch (node->pn_expr->pn_type) {
1062 case TOK_LET:
1063 /* let statement */
1064 assert(node->pn_expr->pn_arity == PN_BINARY);
1065 instrument_statement(node->pn_expr, f, indent, false);
1066 break;
1067 case TOK_LC:
1068 /* block */
1069 Stream_printf(f, "%*s", indent, "");
1070 Stream_write_string(f, "{\n");
1071 instrument_statement(node->pn_expr, f, indent + 2, false);
1072 Stream_printf(f, "%*s", indent, "");
1073 Stream_write_string(f, "}\n");
1074 break;
1075 case TOK_FOR:
1076 instrument_statement(node->pn_expr, f, indent, false);
1077 break;
1078 default:
1079 abort();
1080 break;
1081 }
1082 break;
1083 case TOK_LET:
1084 switch (node->pn_arity) {
1085 case PN_BINARY:
1086 /* let statement */
1087 Stream_printf(f, "%*s", indent, "");
1088 Stream_write_string(f, "let (");
1089 assert(node->pn_left->pn_type == TOK_LP);
1090 assert(node->pn_left->pn_arity == PN_LIST);
1091 instrument_declarations(node->pn_left, f);
1092 Stream_write_string(f, ") {\n");
1093 instrument_statement(node->pn_right, f, indent + 2, false);
1094 Stream_printf(f, "%*s", indent, "");
1095 Stream_write_string(f, "}\n");
1096 break;
1097 case PN_LIST:
1098 /* let definition */
1099 Stream_printf(f, "%*s", indent, "");
1100 instrument_expression(node, f);
1101 Stream_write_string(f, ";\n");
1102 break;
1103 default:
1104 abort();
1105 break;
1106 }
1107 break;
1108 default:
1109 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1110 }
1111 }
1112
1113 /*
1114 See <Statements> in jsparse.h.
1115 TOK_FUNCTION is handled as a statement and as an expression.
1116 TOK_EXPORT, TOK_IMPORT are not handled.
1117 */
1118 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1119 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1120 uint16_t line = node->pn_pos.begin.lineno;
1121 if (line > num_lines) {
1122 fatal("%s: script contains more than 65,535 lines", file_id);
1123 }
1124
1125 /* the root node has line number 0 */
1126 if (line != 0) {
1127 Stream_printf(f, "%*s", indent, "");
1128 Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1129 lines[line - 1] = 1;
1130 }
1131 }
1132 output_statement(node, f, indent, is_jscoverage_if);
1133 }
1134
1135 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1136 const jschar * characters_end = characters + line_end;
1137 const jschar * cp = characters + line_start;
1138 const char * bp = prefix;
1139 for (;;) {
1140 if (*bp == '\0') {
1141 return true;
1142 }
1143 else if (cp == characters_end) {
1144 return false;
1145 }
1146 else if (*cp != *bp) {
1147 return false;
1148 }
1149 bp++;
1150 cp++;
1151 }
1152 }
1153
1154 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1155 /* XXX - other Unicode space */
1156 const jschar * end = characters + line_end;
1157 for (const jschar * p = characters + line_start; p < end; p++) {
1158 jschar c = *p;
1159 if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1160 continue;
1161 }
1162 else {
1163 return false;
1164 }
1165 }
1166 return true;
1167 }
1168
1169 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1170 fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1171 }
1172
1173 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1174 file_id = id;
1175
1176 /* parse the javascript */
1177 JSParseContext parse_context;
1178 if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1179 fatal("cannot create token stream from file: %s", file_id);
1180 }
1181 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1182 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1183 if (node == NULL) {
1184 js_ReportUncaughtException(context);
1185 fatal("parse error in file: %s", file_id);
1186 }
1187 JS_SetErrorReporter(context, old_error_reporter);
1188 num_lines = node->pn_pos.end.lineno;
1189 lines = xmalloc(num_lines);
1190 for (unsigned int i = 0; i < num_lines; i++) {
1191 lines[i] = 0;
1192 }
1193
1194 /* search code for conditionals */
1195 exclusive_directives = xnew(bool, num_lines);
1196 for (unsigned int i = 0; i < num_lines; i++) {
1197 exclusive_directives[i] = false;
1198 }
1199
1200 bool has_conditionals = false;
1201 struct IfDirective * if_directives = NULL;
1202 size_t line_number = 0;
1203 size_t i = 0;
1204 while (i < num_characters) {
1205 if (line_number == UINT16_MAX) {
1206 fatal("%s: script has more than 65,535 lines", file_id);
1207 }
1208 line_number++;
1209 size_t line_start = i;
1210 jschar c;
1211 bool done = false;
1212 while (! done && i < num_characters) {
1213 c = characters[i];
1214 switch (c) {
1215 case '\r':
1216 case '\n':
1217 case 0x2028:
1218 case 0x2029:
1219 done = true;
1220 break;
1221 default:
1222 i++;
1223 }
1224 }
1225 size_t line_end = i;
1226 if (i < num_characters) {
1227 i++;
1228 if (c == '\r' && i < num_characters && characters[i] == '\n') {
1229 i++;
1230 }
1231 }
1232
1233 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1234 has_conditionals = true;
1235
1236 if (characters_are_white_space(characters, line_start + 16, line_end)) {
1237 exclusive_directives[line_number - 1] = true;
1238 }
1239 else {
1240 struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1241 if_directive->condition_start = characters + line_start + 16;
1242 if_directive->condition_end = characters + line_end;
1243 if_directive->start_line = line_number;
1244 if_directive->end_line = 0;
1245 if_directive->next = if_directives;
1246 if_directives = if_directive;
1247 }
1248 }
1249 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1250 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1251 if (p->end_line == 0) {
1252 p->end_line = line_number;
1253 break;
1254 }
1255 }
1256 }
1257 }
1258
1259 /*
1260 An instrumented JavaScript file has 4 sections:
1261 1. initialization
1262 2. instrumented source code
1263 3. conditionals
1264 4. original source code
1265 */
1266
1267 Stream * instrumented = Stream_new(0);
1268 instrument_statement(node, instrumented, 0, false);
1269 js_FinishParseContext(context, &parse_context);
1270
1271 /* write line number info to the output */
1272 Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1273 Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1274 Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1275 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1276 Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1277 for (int i = 0; i < num_lines; i++) {
1278 if (lines[i]) {
1279 Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1280 }
1281 }
1282 Stream_write_string(output, "}\n");
1283 free(lines);
1284 lines = NULL;
1285 free(exclusive_directives);
1286 exclusive_directives = NULL;
1287
1288 /* conditionals */
1289 if (has_conditionals) {
1290 Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1291 }
1292
1293 /* copy the instrumented source code to the output */
1294 Stream_write(output, instrumented->data, instrumented->length);
1295
1296 /* conditionals */
1297 for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1298 Stream_write_string(output, "if (!(");
1299 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1300 Stream_write_string(output, ")) {\n");
1301 Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1302 Stream_write_string(output, "}\n");
1303 }
1304
1305 /* free */
1306 while (if_directives != NULL) {
1307 struct IfDirective * if_directive = if_directives;
1308 if_directives = if_directives->next;
1309 free(if_directive);
1310 }
1311
1312 /* copy the original source to the output */
1313 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1314 jscoverage_write_source(id, characters, num_characters, output);
1315 Stream_printf(output, ";\n");
1316
1317 Stream_delete(instrumented);
1318
1319 file_id = NULL;
1320 }
1321
1322 void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1323 Stream_write_string(output, "[");
1324 if (jscoverage_highlight) {
1325 Stream * highlighted_stream = Stream_new(num_characters);
1326 jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1327 size_t i = 0;
1328 while (i < highlighted_stream->length) {
1329 if (i > 0) {
1330 Stream_write_char(output, ',');
1331 }
1332
1333 Stream_write_char(output, '"');
1334 bool done = false;
1335 while (! done) {
1336 char c = highlighted_stream->data[i];
1337 switch (c) {
1338 case 0x8:
1339 /* backspace */
1340 Stream_write_string(output, "\\b");
1341 break;
1342 case 0x9:
1343 /* horizontal tab */
1344 Stream_write_string(output, "\\t");
1345 break;
1346 case 0xa:
1347 /* line feed (new line) */
1348 done = true;
1349 break;
1350 /* IE doesn't support this */
1351 /*
1352 case 0xb:
1353 Stream_write_string(output, "\\v");
1354 break;
1355 */
1356 case 0xc:
1357 /* form feed */
1358 Stream_write_string(output, "\\f");
1359 break;
1360 case 0xd:
1361 /* carriage return */
1362 done = true;
1363 if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1364 i++;
1365 }
1366 break;
1367 case '"':
1368 Stream_write_string(output, "\\\"");
1369 break;
1370 case '\\':
1371 Stream_write_string(output, "\\\\");
1372 break;
1373 default:
1374 Stream_write_char(output, c);
1375 break;
1376 }
1377 i++;
1378 if (i >= highlighted_stream->length) {
1379 done = true;
1380 }
1381 }
1382 Stream_write_char(output, '"');
1383 }
1384 Stream_delete(highlighted_stream);
1385 }
1386 else {
1387 size_t i = 0;
1388 while (i < num_characters) {
1389 if (i > 0) {
1390 Stream_write_char(output, ',');
1391 }
1392
1393 Stream_write_char(output, '"');
1394 bool done = false;
1395 while (! done) {
1396 jschar c = characters[i];
1397 switch (c) {
1398 case 0x8:
1399 /* backspace */
1400 Stream_write_string(output, "\\b");
1401 break;
1402 case 0x9:
1403 /* horizontal tab */
1404 Stream_write_string(output, "\\t");
1405 break;
1406 case 0xa:
1407 /* line feed (new line) */
1408 done = true;
1409 break;
1410 /* IE doesn't support this */
1411 /*
1412 case 0xb:
1413 Stream_write_string(output, "\\v");
1414 break;
1415 */
1416 case 0xc:
1417 /* form feed */
1418 Stream_write_string(output, "\\f");
1419 break;
1420 case 0xd:
1421 /* carriage return */
1422 done = true;
1423 if (i + 1 < num_characters && characters[i + 1] == '\n') {
1424 i++;
1425 }
1426 break;
1427 case '"':
1428 Stream_write_string(output, "\\\"");
1429 break;
1430 case '\\':
1431 Stream_write_string(output, "\\\\");
1432 break;
1433 case '&':
1434 Stream_write_string(output, "&amp;");
1435 break;
1436 case '<':
1437 Stream_write_string(output, "&lt;");
1438 break;
1439 case '>':
1440 Stream_write_string(output, "&gt;");
1441 break;
1442 case 0x2028:
1443 case 0x2029:
1444 done = true;
1445 break;
1446 default:
1447 if (32 <= c && c <= 126) {
1448 Stream_write_char(output, c);
1449 }
1450 else {
1451 Stream_printf(output, "&#%d;", c);
1452 }
1453 break;
1454 }
1455 i++;
1456 if (i >= num_characters) {
1457 done = true;
1458 }
1459 }
1460 Stream_write_char(output, '"');
1461 }
1462 }
1463 Stream_write_string(output, "]");
1464 }
1465
1466 void jscoverage_copy_resources(const char * destination_directory) {
1467 copy_resource("jscoverage.html", destination_directory);
1468 copy_resource("jscoverage.css", destination_directory);
1469 copy_resource("jscoverage.js", destination_directory);
1470 copy_resource("jscoverage-ie.css", destination_directory);
1471 copy_resource("jscoverage-throbber.gif", destination_directory);
1472 copy_resource("jscoverage-highlight.css", destination_directory);
1473 }
1474
1475 /*
1476 coverage reports
1477 */
1478
1479 struct FileCoverageList {
1480 FileCoverage * file_coverage;
1481 struct FileCoverageList * next;
1482 };
1483
1484 struct Coverage {
1485 JSHashTable * coverage_table;
1486 struct FileCoverageList * coverage_list;
1487 };
1488
1489 static int compare_strings(const void * p1, const void * p2) {
1490 return strcmp(p1, p2) == 0;
1491 }
1492
1493 Coverage * Coverage_new(void) {
1494 Coverage * result = xmalloc(sizeof(Coverage));
1495 result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1496 if (result->coverage_table == NULL) {
1497 fatal("cannot create hash table");
1498 }
1499 result->coverage_list = NULL;
1500 return result;
1501 }
1502
1503 void Coverage_delete(Coverage * coverage) {
1504 JS_HashTableDestroy(coverage->coverage_table);
1505 struct FileCoverageList * p = coverage->coverage_list;
1506 while (p != NULL) {
1507 free(p->file_coverage->coverage_lines);
1508 if (p->file_coverage->source_lines != NULL) {
1509 for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1510 free(p->file_coverage->source_lines[i]);
1511 }
1512 free(p->file_coverage->source_lines);
1513 }
1514 free(p->file_coverage->id);
1515 free(p->file_coverage);
1516 struct FileCoverageList * q = p;
1517 p = p->next;
1518 free(q);
1519 }
1520 free(coverage);
1521 }
1522
1523 struct EnumeratorArg {
1524 CoverageForeachFunction f;
1525 void * p;
1526 };
1527
1528 static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1529 struct EnumeratorArg * enumerator_arg = arg;
1530 enumerator_arg->f(entry->value, i, enumerator_arg->p);
1531 return 0;
1532 }
1533
1534 void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1535 struct EnumeratorArg enumerator_arg;
1536 enumerator_arg.f = f;
1537 enumerator_arg.p = p;
1538 JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1539 }
1540
1541 int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1542 int result = 0;
1543
1544 jschar * base = js_InflateString(context, (char *) json, &length);
1545 if (base == NULL) {
1546 fatal("out of memory");
1547 }
1548
1549 jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1550 parenthesized_json[0] = '(';
1551 memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1552 parenthesized_json[length + 1] = ')';
1553
1554 JS_free(context, base);
1555
1556 JSParseContext parse_context;
1557 if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1558 free(parenthesized_json);
1559 return -1;
1560 }
1561 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1562 free(parenthesized_json);
1563 if (root == NULL) {
1564 result = -1;
1565 goto done;
1566 }
1567
1568 /* root node must be TOK_LC */
1569 if (root->pn_type != TOK_LC) {
1570 result = -1;
1571 goto done;
1572 }
1573 JSParseNode * semi = root->pn_u.list.head;
1574
1575 /* the list must be TOK_SEMI and it must contain only one element */
1576 if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1577 result = -1;
1578 goto done;
1579 }
1580 JSParseNode * parenthesized = semi->pn_kid;
1581
1582 /* this must be a parenthesized expression */
1583 if (parenthesized->pn_type != TOK_RP) {
1584 result = -1;
1585 goto done;
1586 }
1587 JSParseNode * object = parenthesized->pn_kid;
1588
1589 /* this must be an object literal */
1590 if (object->pn_type != TOK_RC) {
1591 result = -1;
1592 goto done;
1593 }
1594
1595 for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1596 /* every element of this list must be TOK_COLON */
1597 if (p->pn_type != TOK_COLON) {
1598 result = -1;
1599 goto done;
1600 }
1601
1602 /* the key must be a string representing the file */
1603 JSParseNode * key = p->pn_left;
1604 if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1605 result = -1;
1606 goto done;
1607 }
1608 char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1609
1610 /* the value must be an object literal OR an array */
1611 JSParseNode * value = p->pn_right;
1612 if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1613 result = -1;
1614 goto done;
1615 }
1616
1617 JSParseNode * array = NULL;
1618 JSParseNode * source = NULL;
1619 if (value->pn_type == TOK_RB) {
1620 /* an array */
1621 array = value;
1622 }
1623 else if (value->pn_type == TOK_RC) {
1624 /* an object literal */
1625 if (value->pn_count != 2) {
1626 result = -1;
1627 goto done;
1628 }
1629 for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1630 if (element->pn_type != TOK_COLON) {
1631 result = -1;
1632 goto done;
1633 }
1634 JSParseNode * left = element->pn_left;
1635 if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1636 result = -1;
1637 goto done;
1638 }
1639 const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1640 if (strcmp(s, "coverage") == 0) {
1641 array = element->pn_right;
1642 if (array->pn_type != TOK_RB) {
1643 result = -1;
1644 goto done;
1645 }
1646 }
1647 else if (strcmp(s, "source") == 0) {
1648 source = element->pn_right;
1649 if (source->pn_type != TOK_RB) {
1650 result = -1;
1651 goto done;
1652 }
1653 }
1654 else {
1655 result = -1;
1656 goto done;
1657 }
1658 }
1659 }
1660 else {
1661 result = -1;
1662 goto done;
1663 }
1664
1665 if (array == NULL) {
1666 result = -1;
1667 goto done;
1668 }
1669
1670 /* look up the file in the coverage table */
1671 FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1672 if (file_coverage == NULL) {
1673 /* not there: create a new one */
1674 char * id = xstrdup(id_bytes);
1675 file_coverage = xmalloc(sizeof(FileCoverage));
1676 file_coverage->id = id;
1677 file_coverage->num_coverage_lines = array->pn_count;
1678 file_coverage->coverage_lines = xnew(int, array->pn_count);
1679 file_coverage->source_lines = NULL;
1680
1681 /* set coverage for all lines */
1682 uint32 i = 0;
1683 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1684 if (element->pn_type == TOK_NUMBER) {
1685 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1686 }
1687 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1688 file_coverage->coverage_lines[i] = -1;
1689 }
1690 else {
1691 result = -1;
1692 goto done;
1693 }
1694 }
1695 assert(i == array->pn_count);
1696
1697 /* add to the hash table */
1698 JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1699 struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1700 coverage_list->file_coverage = file_coverage;
1701 coverage_list->next = coverage->coverage_list;
1702 coverage->coverage_list = coverage_list;
1703 }
1704 else {
1705 /* sanity check */
1706 assert(strcmp(file_coverage->id, id_bytes) == 0);
1707 if (file_coverage->num_coverage_lines != array->pn_count) {
1708 result = -2;
1709 goto done;
1710 }
1711
1712 /* merge the coverage */
1713 uint32 i = 0;
1714 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1715 if (element->pn_type == TOK_NUMBER) {
1716 if (file_coverage->coverage_lines[i] == -1) {
1717 result = -2;
1718 goto done;
1719 }
1720 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1721 }
1722 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1723 if (file_coverage->coverage_lines[i] != -1) {
1724 result = -2;
1725 goto done;
1726 }
1727 }
1728 else {
1729 result = -1;
1730 goto done;
1731 }
1732 }
1733 assert(i == array->pn_count);
1734 }
1735
1736 /* if this JSON file has source, use it */
1737 if (file_coverage->source_lines == NULL && source != NULL) {
1738 file_coverage->num_source_lines = source->pn_count;
1739 file_coverage->source_lines = xnew(char *, source->pn_count);
1740 uint32 i = 0;
1741 for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1742 if (element->pn_type != TOK_STRING) {
1743 result = -1;
1744 goto done;
1745 }
1746 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1747 }
1748 assert(i == source->pn_count);
1749 }
1750 }
1751
1752 done:
1753 js_FinishParseContext(context, &parse_context);
1754 return result;
1755 }

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