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Revision 355 - (show annotations)
Fri Oct 24 16:19:11 2008 UTC (11 years ago) by siliconforks
File MIME type: text/plain
File size: 51997 byte(s)
Handle `yield' without value.
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 <jsemit.h>
32 #include <jsexn.h>
33 #include <jsfun.h>
34 #include <jsinterp.h>
35 #include <jsiter.h>
36 #include <jsparse.h>
37 #include <jsregexp.h>
38 #include <jsscope.h>
39 #include <jsstr.h>
40
41 #include "encoding.h"
42 #include "global.h"
43 #include "highlight.h"
44 #include "resource-manager.h"
45 #include "util.h"
46
47 struct IfDirective {
48 const jschar * condition_start;
49 const jschar * condition_end;
50 uint16_t start_line;
51 uint16_t end_line;
52 struct IfDirective * next;
53 };
54
55 static bool * exclusive_directives = NULL;
56
57 static JSRuntime * runtime = NULL;
58 static JSContext * context = NULL;
59 static JSObject * global = NULL;
60 static JSVersion js_version = JSVERSION_ECMA_3;
61
62 /*
63 JSParseNode objects store line numbers starting from 1.
64 The lines array stores line numbers starting from 0.
65 */
66 static const char * file_id = NULL;
67 static char * lines = NULL;
68 static uint16_t num_lines = 0;
69
70 void jscoverage_set_js_version(const char * version) {
71 js_version = atoi(version);
72 }
73
74 void jscoverage_init(void) {
75 runtime = JS_NewRuntime(8L * 1024L * 1024L);
76 if (runtime == NULL) {
77 fatal("cannot create runtime");
78 }
79
80 context = JS_NewContext(runtime, 8192);
81 if (context == NULL) {
82 fatal("cannot create context");
83 }
84
85 JS_SetVersion(context, js_version);
86
87 global = JS_NewObject(context, NULL, NULL, NULL);
88 if (global == NULL) {
89 fatal("cannot create global object");
90 }
91
92 if (! JS_InitStandardClasses(context, global)) {
93 fatal("cannot initialize standard classes");
94 }
95 }
96
97 void jscoverage_cleanup(void) {
98 JS_DestroyContext(context);
99 JS_DestroyRuntime(runtime);
100 }
101
102 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
103 for (size_t i = 0; i < num_characters; i++) {
104 jschar c = characters[i];
105 /*
106 XXX does not handle no-break space, other unicode "space separator"
107 */
108 switch (c) {
109 case 0x9:
110 case 0xB:
111 case 0xC:
112 Stream_write_char(f, c);
113 break;
114 default:
115 if (32 <= c && c <= 126) {
116 Stream_write_char(f, c);
117 }
118 else {
119 Stream_printf(f, "\\u%04x", c);
120 }
121 break;
122 }
123 }
124 }
125
126 static void print_string(JSString * s, Stream * f) {
127 size_t length = JSSTRING_LENGTH(s);
128 jschar * characters = JSSTRING_CHARS(s);
129 for (size_t i = 0; i < length; i++) {
130 jschar c = characters[i];
131 if (32 <= c && c <= 126) {
132 switch (c) {
133 case '"':
134 Stream_write_string(f, "\\\"");
135 break;
136 /*
137 case '\'':
138 Stream_write_string(f, "\\'");
139 break;
140 */
141 case '\\':
142 Stream_write_string(f, "\\\\");
143 break;
144 default:
145 Stream_write_char(f, c);
146 break;
147 }
148 }
149 else {
150 switch (c) {
151 case 0x8:
152 Stream_write_string(f, "\\b");
153 break;
154 case 0x9:
155 Stream_write_string(f, "\\t");
156 break;
157 case 0xa:
158 Stream_write_string(f, "\\n");
159 break;
160 /* IE doesn't support this */
161 /*
162 case 0xb:
163 Stream_write_string(f, "\\v");
164 break;
165 */
166 case 0xc:
167 Stream_write_string(f, "\\f");
168 break;
169 case 0xd:
170 Stream_write_string(f, "\\r");
171 break;
172 default:
173 Stream_printf(f, "\\u%04x", c);
174 break;
175 }
176 }
177 }
178 }
179
180 static void print_string_atom(JSAtom * atom, Stream * f) {
181 assert(ATOM_IS_STRING(atom));
182 JSString * s = ATOM_TO_STRING(atom);
183 print_string(s, f);
184 }
185
186 static void print_regex(jsval value, Stream * f) {
187 assert(JSVAL_IS_STRING(value));
188 JSString * s = JSVAL_TO_STRING(value);
189 size_t length = JSSTRING_LENGTH(s);
190 jschar * characters = JSSTRING_CHARS(s);
191 for (size_t i = 0; i < length; i++) {
192 jschar c = characters[i];
193 if (32 <= c && c <= 126) {
194 Stream_write_char(f, c);
195 }
196 else {
197 Stream_printf(f, "\\u%04x", c);
198 }
199 }
200 }
201
202 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
203 assert(ATOM_IS_STRING(atom));
204 JSString * s = ATOM_TO_STRING(atom);
205 Stream_write_char(f, '"');
206 print_string(s, f);
207 Stream_write_char(f, '"');
208 }
209
210 static const char * get_op(uint8 op) {
211 switch(op) {
212 case JSOP_OR:
213 return "||";
214 case JSOP_AND:
215 return "&&";
216 case JSOP_BITOR:
217 return "|";
218 case JSOP_BITXOR:
219 return "^";
220 case JSOP_BITAND:
221 return "&";
222 case JSOP_EQ:
223 return "==";
224 case JSOP_NE:
225 return "!=";
226 case JSOP_STRICTEQ:
227 return "===";
228 case JSOP_STRICTNE:
229 return "!==";
230 case JSOP_LT:
231 return "<";
232 case JSOP_LE:
233 return "<=";
234 case JSOP_GT:
235 return ">";
236 case JSOP_GE:
237 return ">=";
238 case JSOP_LSH:
239 return "<<";
240 case JSOP_RSH:
241 return ">>";
242 case JSOP_URSH:
243 return ">>>";
244 case JSOP_ADD:
245 return "+";
246 case JSOP_SUB:
247 return "-";
248 case JSOP_MUL:
249 return "*";
250 case JSOP_DIV:
251 return "/";
252 case JSOP_MOD:
253 return "%";
254 default:
255 abort();
256 }
257 }
258
259 static void instrument_expression(JSParseNode * node, Stream * f);
260 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
261 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
262
263 enum FunctionType {
264 FUNCTION_NORMAL,
265 FUNCTION_GETTER_OR_SETTER
266 };
267
268 static void output_for_in(JSParseNode * node, Stream * f) {
269 assert(node->pn_type == TOK_FOR);
270 assert(node->pn_arity == PN_BINARY);
271 Stream_write_string(f, "for ");
272 if (node->pn_iflags & JSITER_FOREACH) {
273 Stream_write_string(f, "each ");
274 }
275 Stream_write_char(f, '(');
276 instrument_expression(node->pn_left, f);
277 Stream_write_char(f, ')');
278 }
279
280 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
281 assert(node->pn_type == TOK_FUNCTION);
282 assert(node->pn_arity == PN_FUNC);
283 JSObject * object = node->pn_funpob->object;
284 assert(JS_ObjectIsFunction(context, object));
285 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
286 assert(function);
287 assert(object == &function->object);
288 Stream_printf(f, "%*s", indent, "");
289 if (type == FUNCTION_NORMAL) {
290 Stream_write_string(f, "function");
291 }
292
293 /* function name */
294 if (function->atom) {
295 Stream_write_char(f, ' ');
296 print_string_atom(function->atom, f);
297 }
298
299 /*
300 function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
301 js_DecompileFunction in jsopcode.cpp
302 */
303 Stream_write_string(f, "(");
304 JSArenaPool pool;
305 JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
306 jsuword * local_names = NULL;
307 if (JS_GET_LOCAL_NAME_COUNT(function)) {
308 local_names = js_GetLocalNameArray(context, function, &pool);
309 if (local_names == NULL) {
310 fatal("out of memory");
311 }
312 }
313 for (int i = 0; i < function->nargs; i++) {
314 if (i > 0) {
315 Stream_write_string(f, ", ");
316 }
317 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
318 if (param == NULL) {
319 fatal("unsupported parameter type for function: %s", file_id);
320 }
321 print_string_atom(param, f);
322 }
323 JS_FinishArenaPool(&pool);
324 Stream_write_string(f, ") {\n");
325
326 /* function body */
327 if (function->flags & JSFUN_EXPR_CLOSURE) {
328 /* expression closure */
329 output_statement(node->pn_body, f, indent + 2, false);
330 }
331 else {
332 instrument_statement(node->pn_body, f, indent + 2, false);
333 }
334
335 Stream_write_string(f, "}\n");
336 }
337
338 static void instrument_function_call(JSParseNode * node, Stream * f) {
339 JSParseNode * function_node = node->pn_head;
340 if (function_node->pn_type == TOK_FUNCTION) {
341 JSObject * object = function_node->pn_funpob->object;
342 assert(JS_ObjectIsFunction(context, object));
343 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
344 assert(function);
345 assert(object == &function->object);
346
347 if (function_node->pn_flags & TCF_GENEXP_LAMBDA) {
348 /* it's a generator expression */
349 JSParseNode * lexical_scope_node = function_node->pn_body;
350 assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE);
351 assert(lexical_scope_node->pn_arity == PN_NAME);
352 JSParseNode * for_node = lexical_scope_node->pn_body;
353 assert(for_node->pn_type == TOK_FOR);
354 assert(for_node->pn_arity == PN_BINARY);
355 JSParseNode * if_node = NULL;
356 JSParseNode * semi_node;
357 switch (for_node->pn_right->pn_type) {
358 case TOK_SEMI:
359 semi_node = for_node->pn_right;
360 break;
361 case TOK_IF:
362 if_node = for_node->pn_right;
363 assert(if_node->pn_arity == PN_TERNARY);
364 semi_node = if_node->pn_kid2;
365 assert(semi_node->pn_type == TOK_SEMI);
366 break;
367 default:
368 abort();
369 break;
370 }
371 assert(semi_node->pn_arity == PN_UNARY);
372 JSParseNode * yield_node = semi_node->pn_kid;
373 assert(yield_node->pn_type == TOK_YIELD);
374 Stream_write_char(f, '(');
375 instrument_expression(yield_node->pn_kid, f);
376 Stream_write_char(f, ' ');
377 output_for_in(for_node, f);
378 if (if_node) {
379 Stream_write_string(f, " if (");
380 instrument_expression(if_node->pn_kid1, f);
381 Stream_write_char(f, ')');
382 }
383 Stream_write_char(f, ')');
384 return;
385 }
386 else {
387 Stream_write_char(f, '(');
388 instrument_expression(function_node, f);
389 Stream_write_char(f, ')');
390 }
391 }
392 else {
393 instrument_expression(function_node, f);
394 }
395 Stream_write_char(f, '(');
396 for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) {
397 if (p != node->pn_head->pn_next) {
398 Stream_write_string(f, ", ");
399 }
400 instrument_expression(p, f);
401 }
402 Stream_write_char(f, ')');
403 }
404
405 static void instrument_declarations(JSParseNode * list, Stream * f) {
406 assert(list->pn_arity == PN_LIST);
407 for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
408 switch (p->pn_type) {
409 case TOK_NAME:
410 assert(p->pn_arity == PN_NAME);
411 if (p != list->pn_head) {
412 Stream_write_string(f, ", ");
413 }
414 print_string_atom(p->pn_atom, f);
415 if (p->pn_expr != NULL) {
416 Stream_write_string(f, " = ");
417 instrument_expression(p->pn_expr, f);
418 }
419 break;
420 case TOK_ASSIGN:
421 case TOK_RB:
422 case TOK_RC:
423 /* destructuring */
424 instrument_expression(p, f);
425 break;
426 default:
427 abort();
428 break;
429 }
430 }
431 }
432
433 /*
434 See <Expressions> in jsparse.h.
435 TOK_FUNCTION is handled as a statement and as an expression.
436 TOK_DBLDOT is not handled (XML op).
437 TOK_DEFSHARP and TOK_USESHARP are not handled.
438 TOK_ANYNAME is not handled (XML op).
439 TOK_AT is not handled (XML op).
440 TOK_DBLCOLON is not handled.
441 TOK_XML* are not handled.
442 There seem to be some undocumented expressions:
443 TOK_INSTANCEOF binary
444 TOK_IN binary
445 */
446 static void instrument_expression(JSParseNode * node, Stream * f) {
447 switch (node->pn_type) {
448 case TOK_FUNCTION:
449 instrument_function(node, f, 0, FUNCTION_NORMAL);
450 break;
451 case TOK_COMMA:
452 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
453 if (p != node->pn_head) {
454 Stream_write_string(f, ", ");
455 }
456 instrument_expression(p, f);
457 }
458 break;
459 case TOK_ASSIGN:
460 instrument_expression(node->pn_left, f);
461 Stream_write_char(f, ' ');
462 switch (node->pn_op) {
463 case JSOP_ADD:
464 case JSOP_SUB:
465 case JSOP_MUL:
466 case JSOP_MOD:
467 case JSOP_LSH:
468 case JSOP_RSH:
469 case JSOP_URSH:
470 case JSOP_BITAND:
471 case JSOP_BITOR:
472 case JSOP_BITXOR:
473 case JSOP_DIV:
474 Stream_printf(f, "%s", get_op(node->pn_op));
475 break;
476 default:
477 /* do nothing - it must be a simple assignment */
478 break;
479 }
480 Stream_write_string(f, "= ");
481 instrument_expression(node->pn_right, f);
482 break;
483 case TOK_HOOK:
484 instrument_expression(node->pn_kid1, f);
485 Stream_write_string(f, "? ");
486 instrument_expression(node->pn_kid2, f);
487 Stream_write_string(f, ": ");
488 instrument_expression(node->pn_kid3, f);
489 break;
490 case TOK_OR:
491 case TOK_AND:
492 case TOK_BITOR:
493 case TOK_BITXOR:
494 case TOK_BITAND:
495 case TOK_EQOP:
496 case TOK_RELOP:
497 case TOK_SHOP:
498 case TOK_PLUS:
499 case TOK_MINUS:
500 case TOK_STAR:
501 case TOK_DIVOP:
502 switch (node->pn_arity) {
503 case PN_BINARY:
504 instrument_expression(node->pn_left, f);
505 Stream_printf(f, " %s ", get_op(node->pn_op));
506 instrument_expression(node->pn_right, f);
507 break;
508 case PN_LIST:
509 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
510 if (p != node->pn_head) {
511 Stream_printf(f, " %s ", get_op(node->pn_op));
512 }
513 instrument_expression(p, f);
514 }
515 break;
516 default:
517 abort();
518 }
519 break;
520 case TOK_UNARYOP:
521 switch (node->pn_op) {
522 case JSOP_NEG:
523 Stream_write_char(f, '-');
524 instrument_expression(node->pn_kid, f);
525 break;
526 case JSOP_POS:
527 Stream_write_char(f, '+');
528 instrument_expression(node->pn_kid, f);
529 break;
530 case JSOP_NOT:
531 Stream_write_char(f, '!');
532 instrument_expression(node->pn_kid, f);
533 break;
534 case JSOP_BITNOT:
535 Stream_write_char(f, '~');
536 instrument_expression(node->pn_kid, f);
537 break;
538 case JSOP_TYPEOF:
539 Stream_write_string(f, "typeof ");
540 instrument_expression(node->pn_kid, f);
541 break;
542 case JSOP_VOID:
543 Stream_write_string(f, "void ");
544 instrument_expression(node->pn_kid, f);
545 break;
546 default:
547 fatal("%s: unknown operator (%d) in file", file_id, node->pn_op);
548 break;
549 }
550 break;
551 case TOK_INC:
552 case TOK_DEC:
553 /*
554 This is not documented, but node->pn_op tells whether it is pre- or post-increment.
555 */
556 switch (node->pn_op) {
557 case JSOP_INCNAME:
558 case JSOP_INCPROP:
559 case JSOP_INCELEM:
560 Stream_write_string(f, "++");
561 instrument_expression(node->pn_kid, f);
562 break;
563 case JSOP_DECNAME:
564 case JSOP_DECPROP:
565 case JSOP_DECELEM:
566 Stream_write_string(f, "--");
567 instrument_expression(node->pn_kid, f);
568 break;
569 case JSOP_NAMEINC:
570 case JSOP_PROPINC:
571 case JSOP_ELEMINC:
572 instrument_expression(node->pn_kid, f);
573 Stream_write_string(f, "++");
574 break;
575 case JSOP_NAMEDEC:
576 case JSOP_PROPDEC:
577 case JSOP_ELEMDEC:
578 instrument_expression(node->pn_kid, f);
579 Stream_write_string(f, "--");
580 break;
581 default:
582 abort();
583 break;
584 }
585 break;
586 case TOK_NEW:
587 Stream_write_string(f, "new ");
588 instrument_function_call(node, f);
589 break;
590 case TOK_DELETE:
591 Stream_write_string(f, "delete ");
592 instrument_expression(node->pn_kid, f);
593 break;
594 case TOK_DOT:
595 /*
596 This may have originally been x['foo-bar']. Because the string 'foo-bar'
597 contains illegal characters, we have to use the subscript syntax instead of
598 the dot syntax.
599 */
600 instrument_expression(node->pn_expr, f);
601 assert(ATOM_IS_STRING(node->pn_atom));
602 {
603 JSString * s = ATOM_TO_STRING(node->pn_atom);
604 bool must_quote;
605 if (JSSTRING_LENGTH(s) == 0) {
606 must_quote = true;
607 }
608 else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
609 must_quote = true;
610 }
611 else if (! js_IsIdentifier(s)) {
612 must_quote = true;
613 }
614 else {
615 must_quote = false;
616 }
617 if (must_quote) {
618 Stream_write_char(f, '[');
619 print_quoted_string_atom(node->pn_atom, f);
620 Stream_write_char(f, ']');
621 }
622 else {
623 Stream_write_char(f, '.');
624 print_string_atom(node->pn_atom, f);
625 }
626 }
627 break;
628 case TOK_LB:
629 instrument_expression(node->pn_left, f);
630 Stream_write_char(f, '[');
631 instrument_expression(node->pn_right, f);
632 Stream_write_char(f, ']');
633 break;
634 case TOK_LP:
635 instrument_function_call(node, f);
636 break;
637 case TOK_RB:
638 Stream_write_char(f, '[');
639 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
640 if (p != node->pn_head) {
641 Stream_write_string(f, ", ");
642 }
643 /* TOK_COMMA is a special case: a hole in the array */
644 if (p->pn_type != TOK_COMMA) {
645 instrument_expression(p, f);
646 }
647 }
648 if (node->pn_extra == PNX_ENDCOMMA) {
649 Stream_write_char(f, ',');
650 }
651 Stream_write_char(f, ']');
652 break;
653 case TOK_RC:
654 Stream_write_char(f, '{');
655 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
656 if (p->pn_type != TOK_COLON) {
657 fatal("unsupported node type in file %s: %d", file_id, p->pn_type);
658 }
659 if (p != node->pn_head) {
660 Stream_write_string(f, ", ");
661 }
662
663 /* check whether this is a getter or setter */
664 switch (p->pn_op) {
665 case JSOP_GETTER:
666 case JSOP_SETTER:
667 if (p->pn_op == JSOP_GETTER) {
668 Stream_write_string(f, "get ");
669 }
670 else {
671 Stream_write_string(f, "set ");
672 }
673 instrument_expression(p->pn_left, f);
674 if (p->pn_right->pn_type != TOK_FUNCTION) {
675 fatal("parse error: expected function");
676 }
677 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
678 break;
679 default:
680 instrument_expression(p->pn_left, f);
681 Stream_write_string(f, ": ");
682 instrument_expression(p->pn_right, f);
683 break;
684 }
685 }
686 Stream_write_char(f, '}');
687 break;
688 case TOK_RP:
689 Stream_write_char(f, '(');
690 instrument_expression(node->pn_kid, f);
691 Stream_write_char(f, ')');
692 break;
693 case TOK_NAME:
694 print_string_atom(node->pn_atom, f);
695 break;
696 case TOK_STRING:
697 print_quoted_string_atom(node->pn_atom, f);
698 break;
699 case TOK_REGEXP:
700 assert(node->pn_op == JSOP_REGEXP);
701 {
702 JSObject * object = node->pn_pob->object;
703 jsval result;
704 js_regexp_toString(context, object, &result);
705 print_regex(result, f);
706 }
707 break;
708 case TOK_NUMBER:
709 /*
710 A 64-bit IEEE 754 floating point number has a 52-bit fraction.
711 2^(-52) = 2.22 x 10^(-16)
712 Thus there are 16 significant digits.
713 To keep the output simple, special-case zero.
714 */
715 if (node->pn_dval == 0.0) {
716 Stream_write_string(f, "0");
717 }
718 else {
719 Stream_printf(f, "%.15g", node->pn_dval);
720 }
721 break;
722 case TOK_PRIMARY:
723 switch (node->pn_op) {
724 case JSOP_TRUE:
725 Stream_write_string(f, "true");
726 break;
727 case JSOP_FALSE:
728 Stream_write_string(f, "false");
729 break;
730 case JSOP_NULL:
731 Stream_write_string(f, "null");
732 break;
733 case JSOP_THIS:
734 Stream_write_string(f, "this");
735 break;
736 /* jsscan.h mentions `super' ??? */
737 default:
738 abort();
739 }
740 break;
741 case TOK_INSTANCEOF:
742 instrument_expression(node->pn_left, f);
743 Stream_write_string(f, " instanceof ");
744 instrument_expression(node->pn_right, f);
745 break;
746 case TOK_IN:
747 instrument_expression(node->pn_left, f);
748 Stream_write_string(f, " in ");
749 instrument_expression(node->pn_right, f);
750 break;
751 case TOK_LEXICALSCOPE:
752 assert(node->pn_arity == PN_NAME);
753 assert(node->pn_expr->pn_type == TOK_LET);
754 assert(node->pn_expr->pn_arity == PN_BINARY);
755 Stream_write_string(f, "let(");
756 assert(node->pn_expr->pn_left->pn_type == TOK_LP);
757 assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
758 instrument_declarations(node->pn_expr->pn_left, f);
759 Stream_write_string(f, ") ");
760 instrument_expression(node->pn_expr->pn_right, f);
761 break;
762 case TOK_YIELD:
763 assert(node->pn_arity == PN_UNARY);
764 Stream_write_string(f, "yield");
765 if (node->pn_kid != NULL) {
766 Stream_write_char(f, ' ');
767 instrument_expression(node->pn_kid, f);
768 }
769 break;
770 case TOK_ARRAYCOMP:
771 assert(node->pn_arity == PN_LIST);
772 {
773 JSParseNode * block_node;
774 switch (node->pn_count) {
775 case 1:
776 block_node = node->pn_head;
777 break;
778 case 2:
779 block_node = node->pn_head->pn_next;
780 break;
781 default:
782 abort();
783 break;
784 }
785 assert(block_node->pn_type == TOK_LEXICALSCOPE);
786 assert(block_node->pn_arity == PN_NAME);
787 JSParseNode * for_node = block_node->pn_expr;
788 assert(for_node->pn_type == TOK_FOR);
789 assert(for_node->pn_arity == PN_BINARY);
790 JSParseNode * if_node = NULL;
791 JSParseNode * push_node;
792 switch (for_node->pn_right->pn_type) {
793 case TOK_ARRAYPUSH:
794 push_node = for_node->pn_right;
795 assert(push_node->pn_arity == PN_UNARY);
796 break;
797 case TOK_IF:
798 if_node = for_node->pn_right;
799 assert(if_node->pn_arity == PN_TERNARY);
800 push_node = if_node->pn_kid2;
801 break;
802 default:
803 abort();
804 break;
805 }
806 Stream_write_char(f, '[');
807 instrument_expression(push_node->pn_kid, f);
808 Stream_write_char(f, ' ');
809 output_for_in(for_node, f);
810 if (if_node) {
811 Stream_write_string(f, " if (");
812 instrument_expression(if_node->pn_kid1, f);
813 Stream_write_char(f, ')');
814 }
815 Stream_write_char(f, ']');
816 }
817 break;
818 case TOK_VAR:
819 assert(node->pn_arity == PN_LIST);
820 Stream_write_string(f, "var ");
821 instrument_declarations(node, f);
822 break;
823 case TOK_LET:
824 assert(node->pn_arity == PN_LIST);
825 Stream_write_string(f, "let ");
826 instrument_declarations(node, f);
827 break;
828 default:
829 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
830 }
831 }
832
833 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
834 switch (node->pn_type) {
835 case TOK_FUNCTION:
836 instrument_function(node, f, indent, FUNCTION_NORMAL);
837 break;
838 case TOK_LC:
839 assert(node->pn_arity == PN_LIST);
840 /*
841 Stream_write_string(f, "{\n");
842 */
843 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
844 instrument_statement(p, f, indent, false);
845 }
846 /*
847 Stream_printf(f, "%*s", indent, "");
848 Stream_write_string(f, "}\n");
849 */
850 break;
851 case TOK_IF:
852 {
853 assert(node->pn_arity == PN_TERNARY);
854
855 uint16_t line = node->pn_pos.begin.lineno;
856 if (! is_jscoverage_if) {
857 if (line > num_lines) {
858 fatal("%s: script contains more than 65,535 lines", file_id);
859 }
860 if (line >= 2 && exclusive_directives[line - 2]) {
861 is_jscoverage_if = true;
862 }
863 }
864
865 Stream_printf(f, "%*s", indent, "");
866 Stream_write_string(f, "if (");
867 instrument_expression(node->pn_kid1, f);
868 Stream_write_string(f, ") {\n");
869 if (is_jscoverage_if && node->pn_kid3) {
870 uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
871 uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
872 Stream_printf(f, "%*s", indent + 2, "");
873 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
874 }
875 instrument_statement(node->pn_kid2, f, indent + 2, false);
876 Stream_printf(f, "%*s", indent, "");
877 Stream_write_string(f, "}\n");
878
879 if (node->pn_kid3 || is_jscoverage_if) {
880 Stream_printf(f, "%*s", indent, "");
881 Stream_write_string(f, "else {\n");
882
883 if (is_jscoverage_if) {
884 uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
885 uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
886 Stream_printf(f, "%*s", indent + 2, "");
887 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
888 }
889
890 if (node->pn_kid3) {
891 instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
892 }
893
894 Stream_printf(f, "%*s", indent, "");
895 Stream_write_string(f, "}\n");
896 }
897
898 break;
899 }
900 case TOK_SWITCH:
901 assert(node->pn_arity == PN_BINARY);
902 Stream_printf(f, "%*s", indent, "");
903 Stream_write_string(f, "switch (");
904 instrument_expression(node->pn_left, f);
905 Stream_write_string(f, ") {\n");
906 {
907 JSParseNode * list = node->pn_right;
908 if (list->pn_type == TOK_LEXICALSCOPE) {
909 list = list->pn_expr;
910 }
911 for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
912 Stream_printf(f, "%*s", indent, "");
913 switch (p->pn_type) {
914 case TOK_CASE:
915 Stream_write_string(f, "case ");
916 instrument_expression(p->pn_left, f);
917 Stream_write_string(f, ":\n");
918 break;
919 case TOK_DEFAULT:
920 Stream_write_string(f, "default:\n");
921 break;
922 default:
923 abort();
924 break;
925 }
926 instrument_statement(p->pn_right, f, indent + 2, false);
927 }
928 }
929 Stream_printf(f, "%*s", indent, "");
930 Stream_write_string(f, "}\n");
931 break;
932 case TOK_CASE:
933 case TOK_DEFAULT:
934 abort();
935 break;
936 case TOK_WHILE:
937 assert(node->pn_arity == PN_BINARY);
938 Stream_printf(f, "%*s", indent, "");
939 Stream_write_string(f, "while (");
940 instrument_expression(node->pn_left, f);
941 Stream_write_string(f, ") {\n");
942 instrument_statement(node->pn_right, f, indent + 2, false);
943 Stream_write_string(f, "}\n");
944 break;
945 case TOK_DO:
946 assert(node->pn_arity == PN_BINARY);
947 Stream_printf(f, "%*s", indent, "");
948 Stream_write_string(f, "do {\n");
949 instrument_statement(node->pn_left, f, indent + 2, false);
950 Stream_write_string(f, "}\n");
951 Stream_printf(f, "%*s", indent, "");
952 Stream_write_string(f, "while (");
953 instrument_expression(node->pn_right, f);
954 Stream_write_string(f, ");\n");
955 break;
956 case TOK_FOR:
957 assert(node->pn_arity == PN_BINARY);
958 Stream_printf(f, "%*s", indent, "");
959 switch (node->pn_left->pn_type) {
960 case TOK_IN:
961 /* for/in */
962 assert(node->pn_left->pn_arity == PN_BINARY);
963 output_for_in(node, f);
964 break;
965 case TOK_RESERVED:
966 /* for (;;) */
967 assert(node->pn_left->pn_arity == PN_TERNARY);
968 Stream_write_string(f, "for (");
969 if (node->pn_left->pn_kid1) {
970 instrument_expression(node->pn_left->pn_kid1, f);
971 }
972 Stream_write_string(f, ";");
973 if (node->pn_left->pn_kid2) {
974 Stream_write_char(f, ' ');
975 instrument_expression(node->pn_left->pn_kid2, f);
976 }
977 Stream_write_string(f, ";");
978 if (node->pn_left->pn_kid3) {
979 Stream_write_char(f, ' ');
980 instrument_expression(node->pn_left->pn_kid3, f);
981 }
982 Stream_write_char(f, ')');
983 break;
984 default:
985 abort();
986 break;
987 }
988 Stream_write_string(f, " {\n");
989 instrument_statement(node->pn_right, f, indent + 2, false);
990 Stream_write_string(f, "}\n");
991 break;
992 case TOK_THROW:
993 assert(node->pn_arity == PN_UNARY);
994 Stream_printf(f, "%*s", indent, "");
995 Stream_write_string(f, "throw ");
996 instrument_expression(node->pn_u.unary.kid, f);
997 Stream_write_string(f, ";\n");
998 break;
999 case TOK_TRY:
1000 Stream_printf(f, "%*s", indent, "");
1001 Stream_write_string(f, "try {\n");
1002 instrument_statement(node->pn_kid1, f, indent + 2, false);
1003 Stream_printf(f, "%*s", indent, "");
1004 Stream_write_string(f, "}\n");
1005 if (node->pn_kid2) {
1006 assert(node->pn_kid2->pn_type == TOK_RESERVED);
1007 for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
1008 assert(scope->pn_type == TOK_LEXICALSCOPE);
1009 JSParseNode * catch = scope->pn_expr;
1010 assert(catch->pn_type == TOK_CATCH);
1011 Stream_printf(f, "%*s", indent, "");
1012 Stream_write_string(f, "catch (");
1013 /* this may not be a name - destructuring assignment */
1014 /*
1015 assert(catch->pn_kid1->pn_arity == PN_NAME);
1016 print_string_atom(catch->pn_kid1->pn_atom, f);
1017 */
1018 instrument_expression(catch->pn_kid1, f);
1019 if (catch->pn_kid2) {
1020 Stream_write_string(f, " if ");
1021 instrument_expression(catch->pn_kid2, f);
1022 }
1023 Stream_write_string(f, ") {\n");
1024 instrument_statement(catch->pn_kid3, f, indent + 2, false);
1025 Stream_printf(f, "%*s", indent, "");
1026 Stream_write_string(f, "}\n");
1027 }
1028 }
1029 if (node->pn_kid3) {
1030 Stream_printf(f, "%*s", indent, "");
1031 Stream_write_string(f, "finally {\n");
1032 instrument_statement(node->pn_kid3, f, indent + 2, false);
1033 Stream_printf(f, "%*s", indent, "");
1034 Stream_write_string(f, "}\n");
1035 }
1036 break;
1037 case TOK_CATCH:
1038 abort();
1039 break;
1040 case TOK_BREAK:
1041 case TOK_CONTINUE:
1042 assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1043 Stream_printf(f, "%*s", indent, "");
1044 Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1045 JSAtom * atom = node->pn_u.name.atom;
1046 if (atom != NULL) {
1047 Stream_write_char(f, ' ');
1048 print_string_atom(node->pn_atom, f);
1049 }
1050 Stream_write_string(f, ";\n");
1051 break;
1052 case TOK_WITH:
1053 assert(node->pn_arity == PN_BINARY);
1054 Stream_printf(f, "%*s", indent, "");
1055 Stream_write_string(f, "with (");
1056 instrument_expression(node->pn_left, f);
1057 Stream_write_string(f, ") {\n");
1058 instrument_statement(node->pn_right, f, indent + 2, false);
1059 Stream_printf(f, "%*s", indent, "");
1060 Stream_write_string(f, "}\n");
1061 break;
1062 case TOK_VAR:
1063 Stream_printf(f, "%*s", indent, "");
1064 instrument_expression(node, f);
1065 Stream_write_string(f, ";\n");
1066 break;
1067 case TOK_RETURN:
1068 assert(node->pn_arity == PN_UNARY);
1069 Stream_printf(f, "%*s", indent, "");
1070 Stream_write_string(f, "return");
1071 if (node->pn_kid != NULL) {
1072 Stream_write_char(f, ' ');
1073 instrument_expression(node->pn_kid, f);
1074 }
1075 Stream_write_string(f, ";\n");
1076 break;
1077 case TOK_SEMI:
1078 assert(node->pn_arity == PN_UNARY);
1079 Stream_printf(f, "%*s", indent, "");
1080 if (node->pn_kid != NULL) {
1081 instrument_expression(node->pn_kid, f);
1082 }
1083 Stream_write_string(f, ";\n");
1084 break;
1085 case TOK_COLON:
1086 assert(node->pn_arity == PN_NAME);
1087 /*
1088 This one is tricky: can't output instrumentation between the label and the
1089 statement it's supposed to label ...
1090 */
1091 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1092 print_string_atom(node->pn_atom, f);
1093 Stream_write_string(f, ":\n");
1094 /*
1095 ... use output_statement instead of instrument_statement.
1096 */
1097 output_statement(node->pn_expr, f, indent, false);
1098 break;
1099 case TOK_LEXICALSCOPE:
1100 /* let statement */
1101 assert(node->pn_arity == PN_NAME);
1102 switch (node->pn_expr->pn_type) {
1103 case TOK_LET:
1104 /* let statement */
1105 assert(node->pn_expr->pn_arity == PN_BINARY);
1106 instrument_statement(node->pn_expr, f, indent, false);
1107 break;
1108 case TOK_LC:
1109 /* block */
1110 Stream_printf(f, "%*s", indent, "");
1111 Stream_write_string(f, "{\n");
1112 instrument_statement(node->pn_expr, f, indent + 2, false);
1113 Stream_printf(f, "%*s", indent, "");
1114 Stream_write_string(f, "}\n");
1115 break;
1116 case TOK_FOR:
1117 instrument_statement(node->pn_expr, f, indent, false);
1118 break;
1119 default:
1120 abort();
1121 break;
1122 }
1123 break;
1124 case TOK_LET:
1125 switch (node->pn_arity) {
1126 case PN_BINARY:
1127 /* let statement */
1128 Stream_printf(f, "%*s", indent, "");
1129 Stream_write_string(f, "let (");
1130 assert(node->pn_left->pn_type == TOK_LP);
1131 assert(node->pn_left->pn_arity == PN_LIST);
1132 instrument_declarations(node->pn_left, f);
1133 Stream_write_string(f, ") {\n");
1134 instrument_statement(node->pn_right, f, indent + 2, false);
1135 Stream_printf(f, "%*s", indent, "");
1136 Stream_write_string(f, "}\n");
1137 break;
1138 case PN_LIST:
1139 /* let definition */
1140 Stream_printf(f, "%*s", indent, "");
1141 instrument_expression(node, f);
1142 Stream_write_string(f, ";\n");
1143 break;
1144 default:
1145 abort();
1146 break;
1147 }
1148 break;
1149 case TOK_DEBUGGER:
1150 Stream_printf(f, "%*s", indent, "");
1151 Stream_write_string(f, "debugger;\n");
1152 break;
1153 default:
1154 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1155 }
1156 }
1157
1158 /*
1159 See <Statements> in jsparse.h.
1160 TOK_FUNCTION is handled as a statement and as an expression.
1161 TOK_EXPORT, TOK_IMPORT are not handled.
1162 */
1163 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1164 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1165 uint16_t line = node->pn_pos.begin.lineno;
1166 if (line > num_lines) {
1167 fatal("%s: script contains more than 65,535 lines", file_id);
1168 }
1169
1170 /* the root node has line number 0 */
1171 if (line != 0) {
1172 Stream_printf(f, "%*s", indent, "");
1173 Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1174 lines[line - 1] = 1;
1175 }
1176 }
1177 output_statement(node, f, indent, is_jscoverage_if);
1178 }
1179
1180 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1181 const jschar * characters_end = characters + line_end;
1182 const jschar * cp = characters + line_start;
1183 const char * bp = prefix;
1184 for (;;) {
1185 if (*bp == '\0') {
1186 return true;
1187 }
1188 else if (cp == characters_end) {
1189 return false;
1190 }
1191 else if (*cp != *bp) {
1192 return false;
1193 }
1194 bp++;
1195 cp++;
1196 }
1197 }
1198
1199 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1200 /* XXX - other Unicode space */
1201 const jschar * end = characters + line_end;
1202 for (const jschar * p = characters + line_start; p < end; p++) {
1203 jschar c = *p;
1204 if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1205 continue;
1206 }
1207 else {
1208 return false;
1209 }
1210 }
1211 return true;
1212 }
1213
1214 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1215 fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1216 }
1217
1218 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1219 file_id = id;
1220
1221 /* parse the javascript */
1222 JSParseContext parse_context;
1223 if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1224 fatal("cannot create token stream from file: %s", file_id);
1225 }
1226 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1227 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1228 if (node == NULL) {
1229 js_ReportUncaughtException(context);
1230 fatal("parse error in file: %s", file_id);
1231 }
1232 JS_SetErrorReporter(context, old_error_reporter);
1233 num_lines = node->pn_pos.end.lineno;
1234 lines = xmalloc(num_lines);
1235 for (unsigned int i = 0; i < num_lines; i++) {
1236 lines[i] = 0;
1237 }
1238
1239 /* search code for conditionals */
1240 exclusive_directives = xnew(bool, num_lines);
1241 for (unsigned int i = 0; i < num_lines; i++) {
1242 exclusive_directives[i] = false;
1243 }
1244
1245 bool has_conditionals = false;
1246 struct IfDirective * if_directives = NULL;
1247 size_t line_number = 0;
1248 size_t i = 0;
1249 while (i < num_characters) {
1250 if (line_number == UINT16_MAX) {
1251 fatal("%s: script has more than 65,535 lines", file_id);
1252 }
1253 line_number++;
1254 size_t line_start = i;
1255 jschar c;
1256 bool done = false;
1257 while (! done && i < num_characters) {
1258 c = characters[i];
1259 switch (c) {
1260 case '\r':
1261 case '\n':
1262 case 0x2028:
1263 case 0x2029:
1264 done = true;
1265 break;
1266 default:
1267 i++;
1268 }
1269 }
1270 size_t line_end = i;
1271 if (i < num_characters) {
1272 i++;
1273 if (c == '\r' && i < num_characters && characters[i] == '\n') {
1274 i++;
1275 }
1276 }
1277
1278 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1279 has_conditionals = true;
1280
1281 if (characters_are_white_space(characters, line_start + 16, line_end)) {
1282 exclusive_directives[line_number - 1] = true;
1283 }
1284 else {
1285 struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1286 if_directive->condition_start = characters + line_start + 16;
1287 if_directive->condition_end = characters + line_end;
1288 if_directive->start_line = line_number;
1289 if_directive->end_line = 0;
1290 if_directive->next = if_directives;
1291 if_directives = if_directive;
1292 }
1293 }
1294 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1295 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1296 if (p->end_line == 0) {
1297 p->end_line = line_number;
1298 break;
1299 }
1300 }
1301 }
1302 }
1303
1304 /*
1305 An instrumented JavaScript file has 4 sections:
1306 1. initialization
1307 2. instrumented source code
1308 3. conditionals
1309 4. original source code
1310 */
1311
1312 Stream * instrumented = Stream_new(0);
1313 instrument_statement(node, instrumented, 0, false);
1314 js_FinishParseContext(context, &parse_context);
1315
1316 /* write line number info to the output */
1317 Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1318 Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1319 Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1320 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1321 Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1322 for (int i = 0; i < num_lines; i++) {
1323 if (lines[i]) {
1324 Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1325 }
1326 }
1327 Stream_write_string(output, "}\n");
1328 free(lines);
1329 lines = NULL;
1330 free(exclusive_directives);
1331 exclusive_directives = NULL;
1332
1333 /* conditionals */
1334 if (has_conditionals) {
1335 Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1336 }
1337
1338 /* copy the instrumented source code to the output */
1339 Stream_write(output, instrumented->data, instrumented->length);
1340
1341 /* conditionals */
1342 for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1343 Stream_write_string(output, "if (!(");
1344 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1345 Stream_write_string(output, ")) {\n");
1346 Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1347 Stream_write_string(output, "}\n");
1348 }
1349
1350 /* free */
1351 while (if_directives != NULL) {
1352 struct IfDirective * if_directive = if_directives;
1353 if_directives = if_directives->next;
1354 free(if_directive);
1355 }
1356
1357 /* copy the original source to the output */
1358 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1359 jscoverage_write_source(id, characters, num_characters, output);
1360 Stream_printf(output, ";\n");
1361
1362 Stream_delete(instrumented);
1363
1364 file_id = NULL;
1365 }
1366
1367 void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1368 Stream_write_string(output, "[");
1369 if (jscoverage_highlight) {
1370 Stream * highlighted_stream = Stream_new(num_characters);
1371 jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1372 size_t i = 0;
1373 while (i < highlighted_stream->length) {
1374 if (i > 0) {
1375 Stream_write_char(output, ',');
1376 }
1377
1378 Stream_write_char(output, '"');
1379 bool done = false;
1380 while (! done) {
1381 char c = highlighted_stream->data[i];
1382 switch (c) {
1383 case 0x8:
1384 /* backspace */
1385 Stream_write_string(output, "\\b");
1386 break;
1387 case 0x9:
1388 /* horizontal tab */
1389 Stream_write_string(output, "\\t");
1390 break;
1391 case 0xa:
1392 /* line feed (new line) */
1393 done = true;
1394 break;
1395 /* IE doesn't support this */
1396 /*
1397 case 0xb:
1398 Stream_write_string(output, "\\v");
1399 break;
1400 */
1401 case 0xc:
1402 /* form feed */
1403 Stream_write_string(output, "\\f");
1404 break;
1405 case 0xd:
1406 /* carriage return */
1407 done = true;
1408 if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1409 i++;
1410 }
1411 break;
1412 case '"':
1413 Stream_write_string(output, "\\\"");
1414 break;
1415 case '\\':
1416 Stream_write_string(output, "\\\\");
1417 break;
1418 default:
1419 Stream_write_char(output, c);
1420 break;
1421 }
1422 i++;
1423 if (i >= highlighted_stream->length) {
1424 done = true;
1425 }
1426 }
1427 Stream_write_char(output, '"');
1428 }
1429 Stream_delete(highlighted_stream);
1430 }
1431 else {
1432 size_t i = 0;
1433 while (i < num_characters) {
1434 if (i > 0) {
1435 Stream_write_char(output, ',');
1436 }
1437
1438 Stream_write_char(output, '"');
1439 bool done = false;
1440 while (! done) {
1441 jschar c = characters[i];
1442 switch (c) {
1443 case 0x8:
1444 /* backspace */
1445 Stream_write_string(output, "\\b");
1446 break;
1447 case 0x9:
1448 /* horizontal tab */
1449 Stream_write_string(output, "\\t");
1450 break;
1451 case 0xa:
1452 /* line feed (new line) */
1453 done = true;
1454 break;
1455 /* IE doesn't support this */
1456 /*
1457 case 0xb:
1458 Stream_write_string(output, "\\v");
1459 break;
1460 */
1461 case 0xc:
1462 /* form feed */
1463 Stream_write_string(output, "\\f");
1464 break;
1465 case 0xd:
1466 /* carriage return */
1467 done = true;
1468 if (i + 1 < num_characters && characters[i + 1] == '\n') {
1469 i++;
1470 }
1471 break;
1472 case '"':
1473 Stream_write_string(output, "\\\"");
1474 break;
1475 case '\\':
1476 Stream_write_string(output, "\\\\");
1477 break;
1478 case '&':
1479 Stream_write_string(output, "&amp;");
1480 break;
1481 case '<':
1482 Stream_write_string(output, "&lt;");
1483 break;
1484 case '>':
1485 Stream_write_string(output, "&gt;");
1486 break;
1487 case 0x2028:
1488 case 0x2029:
1489 done = true;
1490 break;
1491 default:
1492 if (32 <= c && c <= 126) {
1493 Stream_write_char(output, c);
1494 }
1495 else {
1496 Stream_printf(output, "&#%d;", c);
1497 }
1498 break;
1499 }
1500 i++;
1501 if (i >= num_characters) {
1502 done = true;
1503 }
1504 }
1505 Stream_write_char(output, '"');
1506 }
1507 }
1508 Stream_write_string(output, "]");
1509 }
1510
1511 void jscoverage_copy_resources(const char * destination_directory) {
1512 copy_resource("jscoverage.html", destination_directory);
1513 copy_resource("jscoverage.css", destination_directory);
1514 copy_resource("jscoverage.js", destination_directory);
1515 copy_resource("jscoverage-ie.css", destination_directory);
1516 copy_resource("jscoverage-throbber.gif", destination_directory);
1517 copy_resource("jscoverage-highlight.css", destination_directory);
1518 }
1519
1520 /*
1521 coverage reports
1522 */
1523
1524 struct FileCoverageList {
1525 FileCoverage * file_coverage;
1526 struct FileCoverageList * next;
1527 };
1528
1529 struct Coverage {
1530 JSHashTable * coverage_table;
1531 struct FileCoverageList * coverage_list;
1532 };
1533
1534 static int compare_strings(const void * p1, const void * p2) {
1535 return strcmp(p1, p2) == 0;
1536 }
1537
1538 Coverage * Coverage_new(void) {
1539 Coverage * result = xmalloc(sizeof(Coverage));
1540 result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1541 if (result->coverage_table == NULL) {
1542 fatal("cannot create hash table");
1543 }
1544 result->coverage_list = NULL;
1545 return result;
1546 }
1547
1548 void Coverage_delete(Coverage * coverage) {
1549 JS_HashTableDestroy(coverage->coverage_table);
1550 struct FileCoverageList * p = coverage->coverage_list;
1551 while (p != NULL) {
1552 free(p->file_coverage->coverage_lines);
1553 if (p->file_coverage->source_lines != NULL) {
1554 for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1555 free(p->file_coverage->source_lines[i]);
1556 }
1557 free(p->file_coverage->source_lines);
1558 }
1559 free(p->file_coverage->id);
1560 free(p->file_coverage);
1561 struct FileCoverageList * q = p;
1562 p = p->next;
1563 free(q);
1564 }
1565 free(coverage);
1566 }
1567
1568 struct EnumeratorArg {
1569 CoverageForeachFunction f;
1570 void * p;
1571 };
1572
1573 static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1574 struct EnumeratorArg * enumerator_arg = arg;
1575 enumerator_arg->f(entry->value, i, enumerator_arg->p);
1576 return 0;
1577 }
1578
1579 void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1580 struct EnumeratorArg enumerator_arg;
1581 enumerator_arg.f = f;
1582 enumerator_arg.p = p;
1583 JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1584 }
1585
1586 int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1587 int result = 0;
1588
1589 jschar * base = js_InflateString(context, (char *) json, &length);
1590 if (base == NULL) {
1591 fatal("out of memory");
1592 }
1593
1594 jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1595 parenthesized_json[0] = '(';
1596 memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1597 parenthesized_json[length + 1] = ')';
1598
1599 JS_free(context, base);
1600
1601 JSParseContext parse_context;
1602 if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1603 free(parenthesized_json);
1604 return -1;
1605 }
1606 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1607 free(parenthesized_json);
1608 if (root == NULL) {
1609 result = -1;
1610 goto done;
1611 }
1612
1613 /* root node must be TOK_LC */
1614 if (root->pn_type != TOK_LC) {
1615 result = -1;
1616 goto done;
1617 }
1618 JSParseNode * semi = root->pn_u.list.head;
1619
1620 /* the list must be TOK_SEMI and it must contain only one element */
1621 if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1622 result = -1;
1623 goto done;
1624 }
1625 JSParseNode * parenthesized = semi->pn_kid;
1626
1627 /* this must be a parenthesized expression */
1628 if (parenthesized->pn_type != TOK_RP) {
1629 result = -1;
1630 goto done;
1631 }
1632 JSParseNode * object = parenthesized->pn_kid;
1633
1634 /* this must be an object literal */
1635 if (object->pn_type != TOK_RC) {
1636 result = -1;
1637 goto done;
1638 }
1639
1640 for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1641 /* every element of this list must be TOK_COLON */
1642 if (p->pn_type != TOK_COLON) {
1643 result = -1;
1644 goto done;
1645 }
1646
1647 /* the key must be a string representing the file */
1648 JSParseNode * key = p->pn_left;
1649 if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1650 result = -1;
1651 goto done;
1652 }
1653 char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1654
1655 /* the value must be an object literal OR an array */
1656 JSParseNode * value = p->pn_right;
1657 if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1658 result = -1;
1659 goto done;
1660 }
1661
1662 JSParseNode * array = NULL;
1663 JSParseNode * source = NULL;
1664 if (value->pn_type == TOK_RB) {
1665 /* an array */
1666 array = value;
1667 }
1668 else if (value->pn_type == TOK_RC) {
1669 /* an object literal */
1670 if (value->pn_count != 2) {
1671 result = -1;
1672 goto done;
1673 }
1674 for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1675 if (element->pn_type != TOK_COLON) {
1676 result = -1;
1677 goto done;
1678 }
1679 JSParseNode * left = element->pn_left;
1680 if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1681 result = -1;
1682 goto done;
1683 }
1684 const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1685 if (strcmp(s, "coverage") == 0) {
1686 array = element->pn_right;
1687 if (array->pn_type != TOK_RB) {
1688 result = -1;
1689 goto done;
1690 }
1691 }
1692 else if (strcmp(s, "source") == 0) {
1693 source = element->pn_right;
1694 if (source->pn_type != TOK_RB) {
1695 result = -1;
1696 goto done;
1697 }
1698 }
1699 else {
1700 result = -1;
1701 goto done;
1702 }
1703 }
1704 }
1705 else {
1706 result = -1;
1707 goto done;
1708 }
1709
1710 if (array == NULL) {
1711 result = -1;
1712 goto done;
1713 }
1714
1715 /* look up the file in the coverage table */
1716 FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1717 if (file_coverage == NULL) {
1718 /* not there: create a new one */
1719 char * id = xstrdup(id_bytes);
1720 file_coverage = xmalloc(sizeof(FileCoverage));
1721 file_coverage->id = id;
1722 file_coverage->num_coverage_lines = array->pn_count;
1723 file_coverage->coverage_lines = xnew(int, array->pn_count);
1724 file_coverage->source_lines = NULL;
1725
1726 /* set coverage for all lines */
1727 uint32 i = 0;
1728 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1729 if (element->pn_type == TOK_NUMBER) {
1730 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1731 }
1732 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1733 file_coverage->coverage_lines[i] = -1;
1734 }
1735 else {
1736 result = -1;
1737 goto done;
1738 }
1739 }
1740 assert(i == array->pn_count);
1741
1742 /* add to the hash table */
1743 JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1744 struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1745 coverage_list->file_coverage = file_coverage;
1746 coverage_list->next = coverage->coverage_list;
1747 coverage->coverage_list = coverage_list;
1748 }
1749 else {
1750 /* sanity check */
1751 assert(strcmp(file_coverage->id, id_bytes) == 0);
1752 if (file_coverage->num_coverage_lines != array->pn_count) {
1753 result = -2;
1754 goto done;
1755 }
1756
1757 /* merge the coverage */
1758 uint32 i = 0;
1759 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1760 if (element->pn_type == TOK_NUMBER) {
1761 if (file_coverage->coverage_lines[i] == -1) {
1762 result = -2;
1763 goto done;
1764 }
1765 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1766 }
1767 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1768 if (file_coverage->coverage_lines[i] != -1) {
1769 result = -2;
1770 goto done;
1771 }
1772 }
1773 else {
1774 result = -1;
1775 goto done;
1776 }
1777 }
1778 assert(i == array->pn_count);
1779 }
1780
1781 /* if this JSON file has source, use it */
1782 if (file_coverage->source_lines == NULL && source != NULL) {
1783 file_coverage->num_source_lines = source->pn_count;
1784 file_coverage->source_lines = xnew(char *, source->pn_count);
1785 uint32 i = 0;
1786 for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1787 if (element->pn_type != TOK_STRING) {
1788 result = -1;
1789 goto done;
1790 }
1791 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1792 }
1793 assert(i == source->pn_count);
1794 }
1795 }
1796
1797 done:
1798 js_FinishParseContext(context, &parse_context);
1799 return result;
1800 }

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