/[jscoverage]/trunk/instrument-js.c
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Revision 339 - (show annotations)
Fri Oct 24 16:13:57 2008 UTC (11 years, 1 month ago) by siliconforks
File MIME type: text/plain
File size: 45455 byte(s)
Add support for the JS 1.6 `for each' statement.
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
261 enum FunctionType {
262 FUNCTION_NORMAL,
263 FUNCTION_GETTER_OR_SETTER
264 };
265
266 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
267 assert(node->pn_type == TOK_FUNCTION);
268 assert(node->pn_arity == PN_FUNC);
269 JSObject * object = node->pn_funpob->object;
270 assert(JS_ObjectIsFunction(context, object));
271 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
272 assert(function);
273 assert(object == &function->object);
274 Stream_printf(f, "%*s", indent, "");
275 if (type == FUNCTION_NORMAL) {
276 Stream_write_string(f, "function");
277 }
278
279 /* function name */
280 if (function->atom) {
281 Stream_write_char(f, ' ');
282 print_string_atom(function->atom, f);
283 }
284
285 /*
286 function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
287 js_DecompileFunction in jsopcode.cpp
288 */
289 Stream_write_string(f, "(");
290 JSArenaPool pool;
291 JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
292 jsuword * local_names = NULL;
293 if (JS_GET_LOCAL_NAME_COUNT(function)) {
294 local_names = js_GetLocalNameArray(context, function, &pool);
295 if (local_names == NULL) {
296 fatal("out of memory");
297 }
298 }
299 for (int i = 0; i < function->nargs; i++) {
300 if (i > 0) {
301 Stream_write_string(f, ", ");
302 }
303 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
304 print_string_atom(param, f);
305 }
306 JS_FinishArenaPool(&pool);
307 Stream_write_string(f, ") {\n");
308
309 /* function body */
310 instrument_statement(node->pn_body, f, indent + 2, false);
311
312 Stream_write_string(f, "}\n");
313 }
314
315 static void instrument_function_call(JSParseNode * node, Stream * f) {
316 instrument_expression(node->pn_head, f);
317 Stream_write_char(f, '(');
318 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
319 if (p != node->pn_head->pn_next) {
320 Stream_write_string(f, ", ");
321 }
322 instrument_expression(p, f);
323 }
324 Stream_write_char(f, ')');
325 }
326
327 /*
328 See <Expressions> in jsparse.h.
329 TOK_FUNCTION is handled as a statement and as an expression.
330 TOK_DBLDOT is not handled (XML op).
331 TOK_DEFSHARP and TOK_USESHARP are not handled.
332 TOK_ANYNAME is not handled (XML op).
333 TOK_AT is not handled (XML op).
334 TOK_DBLCOLON is not handled.
335 TOK_XML* are not handled.
336 There seem to be some undocumented expressions:
337 TOK_INSTANCEOF binary
338 TOK_IN binary
339 */
340 static void instrument_expression(JSParseNode * node, Stream * f) {
341 switch (node->pn_type) {
342 case TOK_FUNCTION:
343 instrument_function(node, f, 0, FUNCTION_NORMAL);
344 break;
345 case TOK_COMMA:
346 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
347 if (p != node->pn_head) {
348 Stream_write_string(f, ", ");
349 }
350 instrument_expression(p, f);
351 }
352 break;
353 case TOK_ASSIGN:
354 instrument_expression(node->pn_left, f);
355 Stream_write_char(f, ' ');
356 switch (node->pn_op) {
357 case JSOP_ADD:
358 case JSOP_SUB:
359 case JSOP_MUL:
360 case JSOP_MOD:
361 case JSOP_LSH:
362 case JSOP_RSH:
363 case JSOP_URSH:
364 case JSOP_BITAND:
365 case JSOP_BITOR:
366 case JSOP_BITXOR:
367 case JSOP_DIV:
368 Stream_printf(f, "%s", get_op(node->pn_op));
369 break;
370 default:
371 /* do nothing - it must be a simple assignment */
372 break;
373 }
374 Stream_write_string(f, "= ");
375 instrument_expression(node->pn_right, f);
376 break;
377 case TOK_HOOK:
378 instrument_expression(node->pn_kid1, f);
379 Stream_write_string(f, "? ");
380 instrument_expression(node->pn_kid2, f);
381 Stream_write_string(f, ": ");
382 instrument_expression(node->pn_kid3, f);
383 break;
384 case TOK_OR:
385 case TOK_AND:
386 case TOK_BITOR:
387 case TOK_BITXOR:
388 case TOK_BITAND:
389 case TOK_EQOP:
390 case TOK_RELOP:
391 case TOK_SHOP:
392 case TOK_PLUS:
393 case TOK_MINUS:
394 case TOK_STAR:
395 case TOK_DIVOP:
396 switch (node->pn_arity) {
397 case PN_BINARY:
398 instrument_expression(node->pn_left, f);
399 Stream_printf(f, " %s ", get_op(node->pn_op));
400 instrument_expression(node->pn_right, f);
401 break;
402 case PN_LIST:
403 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
404 if (p != node->pn_head) {
405 Stream_printf(f, " %s ", get_op(node->pn_op));
406 }
407 instrument_expression(p, f);
408 }
409 break;
410 default:
411 abort();
412 }
413 break;
414 case TOK_UNARYOP:
415 switch (node->pn_op) {
416 case JSOP_NEG:
417 Stream_write_char(f, '-');
418 instrument_expression(node->pn_kid, f);
419 break;
420 case JSOP_POS:
421 Stream_write_char(f, '+');
422 instrument_expression(node->pn_kid, f);
423 break;
424 case JSOP_NOT:
425 Stream_write_char(f, '!');
426 instrument_expression(node->pn_kid, f);
427 break;
428 case JSOP_BITNOT:
429 Stream_write_char(f, '~');
430 instrument_expression(node->pn_kid, f);
431 break;
432 case JSOP_TYPEOF:
433 Stream_write_string(f, "typeof ");
434 instrument_expression(node->pn_kid, f);
435 break;
436 case JSOP_VOID:
437 Stream_write_string(f, "void ");
438 instrument_expression(node->pn_kid, f);
439 break;
440 default:
441 abort();
442 break;
443 }
444 break;
445 case TOK_INC:
446 case TOK_DEC:
447 /*
448 This is not documented, but node->pn_op tells whether it is pre- or post-increment.
449 */
450 switch (node->pn_op) {
451 case JSOP_INCNAME:
452 case JSOP_INCPROP:
453 case JSOP_INCELEM:
454 Stream_write_string(f, "++");
455 instrument_expression(node->pn_kid, f);
456 break;
457 case JSOP_DECNAME:
458 case JSOP_DECPROP:
459 case JSOP_DECELEM:
460 Stream_write_string(f, "--");
461 instrument_expression(node->pn_kid, f);
462 break;
463 case JSOP_NAMEINC:
464 case JSOP_PROPINC:
465 case JSOP_ELEMINC:
466 instrument_expression(node->pn_kid, f);
467 Stream_write_string(f, "++");
468 break;
469 case JSOP_NAMEDEC:
470 case JSOP_PROPDEC:
471 case JSOP_ELEMDEC:
472 instrument_expression(node->pn_kid, f);
473 Stream_write_string(f, "--");
474 break;
475 default:
476 abort();
477 break;
478 }
479 break;
480 case TOK_NEW:
481 Stream_write_string(f, "new ");
482 instrument_function_call(node, f);
483 break;
484 case TOK_DELETE:
485 Stream_write_string(f, "delete ");
486 instrument_expression(node->pn_kid, f);
487 break;
488 case TOK_DOT:
489 /*
490 This may have originally been x['foo-bar']. Because the string 'foo-bar'
491 contains illegal characters, we have to use the subscript syntax instead of
492 the dot syntax.
493 */
494 instrument_expression(node->pn_expr, f);
495 assert(ATOM_IS_STRING(node->pn_atom));
496 {
497 JSString * s = ATOM_TO_STRING(node->pn_atom);
498 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
499 if (! is_keyword && js_IsIdentifier(s)) {
500 Stream_write_char(f, '.');
501 print_string_atom(node->pn_atom, f);
502 }
503 else {
504 Stream_write_char(f, '[');
505 print_quoted_string_atom(node->pn_atom, f);
506 Stream_write_char(f, ']');
507 }
508 }
509 break;
510 case TOK_LB:
511 instrument_expression(node->pn_left, f);
512 Stream_write_char(f, '[');
513 instrument_expression(node->pn_right, f);
514 Stream_write_char(f, ']');
515 break;
516 case TOK_LP:
517 instrument_function_call(node, f);
518 break;
519 case TOK_RB:
520 Stream_write_char(f, '[');
521 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
522 if (p != node->pn_head) {
523 Stream_write_string(f, ", ");
524 }
525 /* TOK_COMMA is a special case: a hole in the array */
526 if (p->pn_type != TOK_COMMA) {
527 instrument_expression(p, f);
528 }
529 }
530 if (node->pn_extra == PNX_ENDCOMMA) {
531 Stream_write_char(f, ',');
532 }
533 Stream_write_char(f, ']');
534 break;
535 case TOK_RC:
536 Stream_write_char(f, '{');
537 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
538 assert(p->pn_type == TOK_COLON);
539 if (p != node->pn_head) {
540 Stream_write_string(f, ", ");
541 }
542
543 /* check whether this is a getter or setter */
544 switch (p->pn_op) {
545 case JSOP_GETTER:
546 case JSOP_SETTER:
547 if (p->pn_op == JSOP_GETTER) {
548 Stream_write_string(f, "get ");
549 }
550 else {
551 Stream_write_string(f, "set ");
552 }
553 instrument_expression(p->pn_left, f);
554 if (p->pn_right->pn_type != TOK_FUNCTION) {
555 fatal("parse error: expected function");
556 }
557 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
558 break;
559 default:
560 instrument_expression(p->pn_left, f);
561 Stream_write_string(f, ": ");
562 instrument_expression(p->pn_right, f);
563 break;
564 }
565 }
566 Stream_write_char(f, '}');
567 break;
568 case TOK_RP:
569 Stream_write_char(f, '(');
570 instrument_expression(node->pn_kid, f);
571 Stream_write_char(f, ')');
572 break;
573 case TOK_NAME:
574 print_string_atom(node->pn_atom, f);
575 break;
576 case TOK_STRING:
577 print_quoted_string_atom(node->pn_atom, f);
578 break;
579 case TOK_REGEXP:
580 assert(node->pn_op == JSOP_REGEXP);
581 {
582 JSObject * object = node->pn_pob->object;
583 jsval result;
584 js_regexp_toString(context, object, &result);
585 print_regex(result, f);
586 }
587 break;
588 case TOK_NUMBER:
589 /*
590 A 64-bit IEEE 754 floating point number has a 52-bit fraction.
591 2^(-52) = 2.22 x 10^(-16)
592 Thus there are 16 significant digits.
593 To keep the output simple, special-case zero.
594 */
595 if (node->pn_dval == 0.0) {
596 Stream_write_string(f, "0");
597 }
598 else {
599 Stream_printf(f, "%.15g", node->pn_dval);
600 }
601 break;
602 case TOK_PRIMARY:
603 switch (node->pn_op) {
604 case JSOP_TRUE:
605 Stream_write_string(f, "true");
606 break;
607 case JSOP_FALSE:
608 Stream_write_string(f, "false");
609 break;
610 case JSOP_NULL:
611 Stream_write_string(f, "null");
612 break;
613 case JSOP_THIS:
614 Stream_write_string(f, "this");
615 break;
616 /* jsscan.h mentions `super' ??? */
617 default:
618 abort();
619 }
620 break;
621 case TOK_INSTANCEOF:
622 instrument_expression(node->pn_left, f);
623 Stream_write_string(f, " instanceof ");
624 instrument_expression(node->pn_right, f);
625 break;
626 case TOK_IN:
627 instrument_expression(node->pn_left, f);
628 Stream_write_string(f, " in ");
629 instrument_expression(node->pn_right, f);
630 break;
631 default:
632 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
633 }
634 }
635
636 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
637 assert(node->pn_arity == PN_LIST);
638 Stream_printf(f, "%*s", indent, "");
639 Stream_write_string(f, "var ");
640 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
641 assert(p->pn_type == TOK_NAME);
642 assert(p->pn_arity == PN_NAME);
643 if (p != node->pn_head) {
644 Stream_write_string(f, ", ");
645 }
646 print_string_atom(p->pn_atom, f);
647 if (p->pn_expr != NULL) {
648 Stream_write_string(f, " = ");
649 instrument_expression(p->pn_expr, f);
650 }
651 }
652 }
653
654 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
655 switch (node->pn_type) {
656 case TOK_FUNCTION:
657 instrument_function(node, f, indent, FUNCTION_NORMAL);
658 break;
659 case TOK_LC:
660 assert(node->pn_arity == PN_LIST);
661 /*
662 Stream_write_string(f, "{\n");
663 */
664 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
665 instrument_statement(p, f, indent, false);
666 }
667 /*
668 Stream_printf(f, "%*s", indent, "");
669 Stream_write_string(f, "}\n");
670 */
671 break;
672 case TOK_IF:
673 {
674 assert(node->pn_arity == PN_TERNARY);
675
676 uint16_t line = node->pn_pos.begin.lineno;
677 if (! is_jscoverage_if) {
678 if (line > num_lines) {
679 fatal("%s: script contains more than 65,535 lines", file_id);
680 }
681 if (line >= 2 && exclusive_directives[line - 2]) {
682 is_jscoverage_if = true;
683 }
684 }
685
686 Stream_printf(f, "%*s", indent, "");
687 Stream_write_string(f, "if (");
688 instrument_expression(node->pn_kid1, f);
689 Stream_write_string(f, ") {\n");
690 if (is_jscoverage_if && node->pn_kid3) {
691 uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
692 uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
693 Stream_printf(f, "%*s", indent + 2, "");
694 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
695 }
696 instrument_statement(node->pn_kid2, f, indent + 2, false);
697 Stream_printf(f, "%*s", indent, "");
698 Stream_write_string(f, "}\n");
699
700 if (node->pn_kid3 || is_jscoverage_if) {
701 Stream_printf(f, "%*s", indent, "");
702 Stream_write_string(f, "else {\n");
703
704 if (is_jscoverage_if) {
705 uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
706 uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
707 Stream_printf(f, "%*s", indent + 2, "");
708 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
709 }
710
711 if (node->pn_kid3) {
712 instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
713 }
714
715 Stream_printf(f, "%*s", indent, "");
716 Stream_write_string(f, "}\n");
717 }
718
719 break;
720 }
721 case TOK_SWITCH:
722 assert(node->pn_arity == PN_BINARY);
723 Stream_printf(f, "%*s", indent, "");
724 Stream_write_string(f, "switch (");
725 instrument_expression(node->pn_left, f);
726 Stream_write_string(f, ") {\n");
727 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
728 Stream_printf(f, "%*s", indent, "");
729 switch (p->pn_type) {
730 case TOK_CASE:
731 Stream_write_string(f, "case ");
732 instrument_expression(p->pn_left, f);
733 Stream_write_string(f, ":\n");
734 break;
735 case TOK_DEFAULT:
736 Stream_write_string(f, "default:\n");
737 break;
738 default:
739 abort();
740 break;
741 }
742 instrument_statement(p->pn_right, f, indent + 2, false);
743 }
744 Stream_printf(f, "%*s", indent, "");
745 Stream_write_string(f, "}\n");
746 break;
747 case TOK_CASE:
748 case TOK_DEFAULT:
749 abort();
750 break;
751 case TOK_WHILE:
752 assert(node->pn_arity == PN_BINARY);
753 Stream_printf(f, "%*s", indent, "");
754 Stream_write_string(f, "while (");
755 instrument_expression(node->pn_left, f);
756 Stream_write_string(f, ") {\n");
757 instrument_statement(node->pn_right, f, indent + 2, false);
758 Stream_write_string(f, "}\n");
759 break;
760 case TOK_DO:
761 assert(node->pn_arity == PN_BINARY);
762 Stream_printf(f, "%*s", indent, "");
763 Stream_write_string(f, "do {\n");
764 instrument_statement(node->pn_left, f, indent + 2, false);
765 Stream_write_string(f, "}\n");
766 Stream_printf(f, "%*s", indent, "");
767 Stream_write_string(f, "while (");
768 instrument_expression(node->pn_right, f);
769 Stream_write_string(f, ");\n");
770 break;
771 case TOK_FOR:
772 assert(node->pn_arity == PN_BINARY);
773 Stream_printf(f, "%*s", indent, "");
774 Stream_write_string(f, "for ");
775 if (node->pn_iflags & JSITER_FOREACH) {
776 Stream_write_string(f, "each ");
777 }
778 Stream_write_char(f, '(');
779 switch (node->pn_left->pn_type) {
780 case TOK_IN:
781 /* for/in */
782 assert(node->pn_left->pn_arity == PN_BINARY);
783 switch (node->pn_left->pn_left->pn_type) {
784 case TOK_VAR:
785 instrument_var_statement(node->pn_left->pn_left, f, 0);
786 break;
787 case TOK_NAME:
788 instrument_expression(node->pn_left->pn_left, f);
789 break;
790 default:
791 /* this is undocumented: for (x.value in y) */
792 instrument_expression(node->pn_left->pn_left, f);
793 break;
794 /*
795 default:
796 fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
797 abort();
798 break;
799 */
800 }
801 Stream_write_string(f, " in ");
802 instrument_expression(node->pn_left->pn_right, f);
803 break;
804 case TOK_RESERVED:
805 /* for (;;) */
806 assert(node->pn_left->pn_arity == PN_TERNARY);
807 if (node->pn_left->pn_kid1) {
808 if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {
809 instrument_var_statement(node->pn_left->pn_kid1, f, 0);
810 }
811 else {
812 instrument_expression(node->pn_left->pn_kid1, f);
813 }
814 }
815 Stream_write_string(f, ";");
816 if (node->pn_left->pn_kid2) {
817 Stream_write_char(f, ' ');
818 instrument_expression(node->pn_left->pn_kid2, f);
819 }
820 Stream_write_string(f, ";");
821 if (node->pn_left->pn_kid3) {
822 Stream_write_char(f, ' ');
823 instrument_expression(node->pn_left->pn_kid3, f);
824 }
825 break;
826 default:
827 abort();
828 break;
829 }
830 Stream_write_string(f, ") {\n");
831 instrument_statement(node->pn_right, f, indent + 2, false);
832 Stream_write_string(f, "}\n");
833 break;
834 case TOK_THROW:
835 assert(node->pn_arity == PN_UNARY);
836 Stream_printf(f, "%*s", indent, "");
837 Stream_write_string(f, "throw ");
838 instrument_expression(node->pn_u.unary.kid, f);
839 Stream_write_string(f, ";\n");
840 break;
841 case TOK_TRY:
842 Stream_printf(f, "%*s", indent, "");
843 Stream_write_string(f, "try {\n");
844 instrument_statement(node->pn_kid1, f, indent + 2, false);
845 Stream_printf(f, "%*s", indent, "");
846 Stream_write_string(f, "}\n");
847 if (node->pn_kid2) {
848 assert(node->pn_kid2->pn_type == TOK_RESERVED);
849 for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
850 assert(scope->pn_type == TOK_LEXICALSCOPE);
851 JSParseNode * catch = scope->pn_expr;
852 assert(catch->pn_type == TOK_CATCH);
853 Stream_printf(f, "%*s", indent, "");
854 Stream_write_string(f, "catch (");
855 assert(catch->pn_kid1->pn_arity == PN_NAME);
856 print_string_atom(catch->pn_kid1->pn_atom, f);
857 if (catch->pn_kid2) {
858 Stream_write_string(f, " if ");
859 instrument_expression(catch->pn_kid2, f);
860 }
861 Stream_write_string(f, ") {\n");
862 instrument_statement(catch->pn_kid3, f, indent + 2, false);
863 Stream_printf(f, "%*s", indent, "");
864 Stream_write_string(f, "}\n");
865 }
866 }
867 if (node->pn_kid3) {
868 Stream_printf(f, "%*s", indent, "");
869 Stream_write_string(f, "finally {\n");
870 instrument_statement(node->pn_kid3, f, indent + 2, false);
871 Stream_printf(f, "%*s", indent, "");
872 Stream_write_string(f, "}\n");
873 }
874 break;
875 case TOK_CATCH:
876 abort();
877 break;
878 case TOK_BREAK:
879 case TOK_CONTINUE:
880 assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
881 Stream_printf(f, "%*s", indent, "");
882 Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
883 JSAtom * atom = node->pn_u.name.atom;
884 if (atom != NULL) {
885 Stream_write_char(f, ' ');
886 print_string_atom(node->pn_atom, f);
887 }
888 Stream_write_string(f, ";\n");
889 break;
890 case TOK_WITH:
891 assert(node->pn_arity == PN_BINARY);
892 Stream_printf(f, "%*s", indent, "");
893 Stream_write_string(f, "with (");
894 instrument_expression(node->pn_left, f);
895 Stream_write_string(f, ") {\n");
896 instrument_statement(node->pn_right, f, indent + 2, false);
897 Stream_printf(f, "%*s", indent, "");
898 Stream_write_string(f, "}\n");
899 break;
900 case TOK_VAR:
901 instrument_var_statement(node, f, indent);
902 Stream_write_string(f, ";\n");
903 break;
904 case TOK_RETURN:
905 assert(node->pn_arity == PN_UNARY);
906 Stream_printf(f, "%*s", indent, "");
907 Stream_write_string(f, "return");
908 if (node->pn_kid != NULL) {
909 Stream_write_char(f, ' ');
910 instrument_expression(node->pn_kid, f);
911 }
912 Stream_write_string(f, ";\n");
913 break;
914 case TOK_SEMI:
915 assert(node->pn_arity == PN_UNARY);
916 Stream_printf(f, "%*s", indent, "");
917 if (node->pn_kid != NULL) {
918 instrument_expression(node->pn_kid, f);
919 }
920 Stream_write_string(f, ";\n");
921 break;
922 case TOK_COLON:
923 assert(node->pn_arity == PN_NAME);
924 /*
925 This one is tricky: can't output instrumentation between the label and the
926 statement it's supposed to label ...
927 */
928 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
929 print_string_atom(node->pn_atom, f);
930 Stream_write_string(f, ":\n");
931 /*
932 ... use output_statement instead of instrument_statement.
933 */
934 output_statement(node->pn_expr, f, indent, false);
935 break;
936 default:
937 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
938 }
939 }
940
941 /*
942 See <Statements> in jsparse.h.
943 TOK_FUNCTION is handled as a statement and as an expression.
944 TOK_EXPORT, TOK_IMPORT are not handled.
945 */
946 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
947 if (node->pn_type != TOK_LC) {
948 uint16_t line = node->pn_pos.begin.lineno;
949 if (line > num_lines) {
950 fatal("%s: script contains more than 65,535 lines", file_id);
951 }
952
953 /* the root node has line number 0 */
954 if (line != 0) {
955 Stream_printf(f, "%*s", indent, "");
956 Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
957 lines[line - 1] = 1;
958 }
959 }
960 output_statement(node, f, indent, is_jscoverage_if);
961 }
962
963 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
964 const jschar * characters_end = characters + line_end;
965 const jschar * cp = characters + line_start;
966 const char * bp = prefix;
967 for (;;) {
968 if (*bp == '\0') {
969 return true;
970 }
971 else if (cp == characters_end) {
972 return false;
973 }
974 else if (*cp != *bp) {
975 return false;
976 }
977 bp++;
978 cp++;
979 }
980 }
981
982 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
983 /* XXX - other Unicode space */
984 const jschar * end = characters + line_end;
985 for (const jschar * p = characters + line_start; p < end; p++) {
986 jschar c = *p;
987 if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
988 continue;
989 }
990 else {
991 return false;
992 }
993 }
994 return true;
995 }
996
997 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
998 fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
999 }
1000
1001 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1002 file_id = id;
1003
1004 /* parse the javascript */
1005 JSParseContext parse_context;
1006 if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1007 fatal("cannot create token stream from file: %s", file_id);
1008 }
1009 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1010 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1011 if (node == NULL) {
1012 js_ReportUncaughtException(context);
1013 fatal("parse error in file: %s", file_id);
1014 }
1015 JS_SetErrorReporter(context, old_error_reporter);
1016 num_lines = node->pn_pos.end.lineno;
1017 lines = xmalloc(num_lines);
1018 for (unsigned int i = 0; i < num_lines; i++) {
1019 lines[i] = 0;
1020 }
1021
1022 /* search code for conditionals */
1023 exclusive_directives = xnew(bool, num_lines);
1024 for (unsigned int i = 0; i < num_lines; i++) {
1025 exclusive_directives[i] = false;
1026 }
1027
1028 bool has_conditionals = false;
1029 struct IfDirective * if_directives = NULL;
1030 size_t line_number = 0;
1031 size_t i = 0;
1032 while (i < num_characters) {
1033 if (line_number == UINT16_MAX) {
1034 fatal("%s: script has more than 65,535 lines", file_id);
1035 }
1036 line_number++;
1037 size_t line_start = i;
1038 jschar c;
1039 bool done = false;
1040 while (! done && i < num_characters) {
1041 c = characters[i];
1042 switch (c) {
1043 case '\r':
1044 case '\n':
1045 case 0x2028:
1046 case 0x2029:
1047 done = true;
1048 break;
1049 default:
1050 i++;
1051 }
1052 }
1053 size_t line_end = i;
1054 if (i < num_characters) {
1055 i++;
1056 if (c == '\r' && i < num_characters && characters[i] == '\n') {
1057 i++;
1058 }
1059 }
1060
1061 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1062 has_conditionals = true;
1063
1064 if (characters_are_white_space(characters, line_start + 16, line_end)) {
1065 exclusive_directives[line_number - 1] = true;
1066 }
1067 else {
1068 struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1069 if_directive->condition_start = characters + line_start + 16;
1070 if_directive->condition_end = characters + line_end;
1071 if_directive->start_line = line_number;
1072 if_directive->end_line = 0;
1073 if_directive->next = if_directives;
1074 if_directives = if_directive;
1075 }
1076 }
1077 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1078 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1079 if (p->end_line == 0) {
1080 p->end_line = line_number;
1081 break;
1082 }
1083 }
1084 }
1085 }
1086
1087 /*
1088 An instrumented JavaScript file has 4 sections:
1089 1. initialization
1090 2. instrumented source code
1091 3. conditionals
1092 4. original source code
1093 */
1094
1095 Stream * instrumented = Stream_new(0);
1096 instrument_statement(node, instrumented, 0, false);
1097 js_FinishParseContext(context, &parse_context);
1098
1099 /* write line number info to the output */
1100 Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1101 Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1102 Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1103 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1104 Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1105 for (int i = 0; i < num_lines; i++) {
1106 if (lines[i]) {
1107 Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1108 }
1109 }
1110 Stream_write_string(output, "}\n");
1111 free(lines);
1112 lines = NULL;
1113 free(exclusive_directives);
1114 exclusive_directives = NULL;
1115
1116 /* conditionals */
1117 if (has_conditionals) {
1118 Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1119 }
1120
1121 /* copy the instrumented source code to the output */
1122 Stream_write(output, instrumented->data, instrumented->length);
1123
1124 /* conditionals */
1125 for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1126 Stream_write_string(output, "if (!(");
1127 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1128 Stream_write_string(output, ")) {\n");
1129 Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1130 Stream_write_string(output, "}\n");
1131 }
1132
1133 /* free */
1134 while (if_directives != NULL) {
1135 struct IfDirective * if_directive = if_directives;
1136 if_directives = if_directives->next;
1137 free(if_directive);
1138 }
1139
1140 /* copy the original source to the output */
1141 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1142 jscoverage_write_source(id, characters, num_characters, output);
1143 Stream_printf(output, ";\n");
1144
1145 Stream_delete(instrumented);
1146
1147 file_id = NULL;
1148 }
1149
1150 void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1151 Stream_write_string(output, "[");
1152 if (jscoverage_highlight) {
1153 Stream * highlighted_stream = Stream_new(num_characters);
1154 jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1155 size_t i = 0;
1156 while (i < highlighted_stream->length) {
1157 if (i > 0) {
1158 Stream_write_char(output, ',');
1159 }
1160
1161 Stream_write_char(output, '"');
1162 bool done = false;
1163 while (! done) {
1164 char c = highlighted_stream->data[i];
1165 switch (c) {
1166 case 0x8:
1167 /* backspace */
1168 Stream_write_string(output, "\\b");
1169 break;
1170 case 0x9:
1171 /* horizontal tab */
1172 Stream_write_string(output, "\\t");
1173 break;
1174 case 0xa:
1175 /* line feed (new line) */
1176 done = true;
1177 break;
1178 /* IE doesn't support this */
1179 /*
1180 case 0xb:
1181 Stream_write_string(output, "\\v");
1182 break;
1183 */
1184 case 0xc:
1185 /* form feed */
1186 Stream_write_string(output, "\\f");
1187 break;
1188 case 0xd:
1189 /* carriage return */
1190 done = true;
1191 if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1192 i++;
1193 }
1194 break;
1195 case '"':
1196 Stream_write_string(output, "\\\"");
1197 break;
1198 case '\\':
1199 Stream_write_string(output, "\\\\");
1200 break;
1201 default:
1202 Stream_write_char(output, c);
1203 break;
1204 }
1205 i++;
1206 if (i >= highlighted_stream->length) {
1207 done = true;
1208 }
1209 }
1210 Stream_write_char(output, '"');
1211 }
1212 Stream_delete(highlighted_stream);
1213 }
1214 else {
1215 size_t i = 0;
1216 while (i < num_characters) {
1217 if (i > 0) {
1218 Stream_write_char(output, ',');
1219 }
1220
1221 Stream_write_char(output, '"');
1222 bool done = false;
1223 while (! done) {
1224 jschar c = characters[i];
1225 switch (c) {
1226 case 0x8:
1227 /* backspace */
1228 Stream_write_string(output, "\\b");
1229 break;
1230 case 0x9:
1231 /* horizontal tab */
1232 Stream_write_string(output, "\\t");
1233 break;
1234 case 0xa:
1235 /* line feed (new line) */
1236 done = true;
1237 break;
1238 /* IE doesn't support this */
1239 /*
1240 case 0xb:
1241 Stream_write_string(output, "\\v");
1242 break;
1243 */
1244 case 0xc:
1245 /* form feed */
1246 Stream_write_string(output, "\\f");
1247 break;
1248 case 0xd:
1249 /* carriage return */
1250 done = true;
1251 if (i + 1 < num_characters && characters[i + 1] == '\n') {
1252 i++;
1253 }
1254 break;
1255 case '"':
1256 Stream_write_string(output, "\\\"");
1257 break;
1258 case '\\':
1259 Stream_write_string(output, "\\\\");
1260 break;
1261 case '&':
1262 Stream_write_string(output, "&amp;");
1263 break;
1264 case '<':
1265 Stream_write_string(output, "&lt;");
1266 break;
1267 case '>':
1268 Stream_write_string(output, "&gt;");
1269 break;
1270 case 0x2028:
1271 case 0x2029:
1272 done = true;
1273 break;
1274 default:
1275 if (32 <= c && c <= 126) {
1276 Stream_write_char(output, c);
1277 }
1278 else {
1279 Stream_printf(output, "&#%d;", c);
1280 }
1281 break;
1282 }
1283 i++;
1284 if (i >= num_characters) {
1285 done = true;
1286 }
1287 }
1288 Stream_write_char(output, '"');
1289 }
1290 }
1291 Stream_write_string(output, "]");
1292 }
1293
1294 void jscoverage_copy_resources(const char * destination_directory) {
1295 copy_resource("jscoverage.html", destination_directory);
1296 copy_resource("jscoverage.css", destination_directory);
1297 copy_resource("jscoverage.js", destination_directory);
1298 copy_resource("jscoverage-ie.css", destination_directory);
1299 copy_resource("jscoverage-throbber.gif", destination_directory);
1300 copy_resource("jscoverage-highlight.css", destination_directory);
1301 }
1302
1303 /*
1304 coverage reports
1305 */
1306
1307 struct FileCoverageList {
1308 FileCoverage * file_coverage;
1309 struct FileCoverageList * next;
1310 };
1311
1312 struct Coverage {
1313 JSHashTable * coverage_table;
1314 struct FileCoverageList * coverage_list;
1315 };
1316
1317 static int compare_strings(const void * p1, const void * p2) {
1318 return strcmp(p1, p2) == 0;
1319 }
1320
1321 Coverage * Coverage_new(void) {
1322 Coverage * result = xmalloc(sizeof(Coverage));
1323 result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1324 if (result->coverage_table == NULL) {
1325 fatal("cannot create hash table");
1326 }
1327 result->coverage_list = NULL;
1328 return result;
1329 }
1330
1331 void Coverage_delete(Coverage * coverage) {
1332 JS_HashTableDestroy(coverage->coverage_table);
1333 struct FileCoverageList * p = coverage->coverage_list;
1334 while (p != NULL) {
1335 free(p->file_coverage->coverage_lines);
1336 if (p->file_coverage->source_lines != NULL) {
1337 for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1338 free(p->file_coverage->source_lines[i]);
1339 }
1340 free(p->file_coverage->source_lines);
1341 }
1342 free(p->file_coverage->id);
1343 free(p->file_coverage);
1344 struct FileCoverageList * q = p;
1345 p = p->next;
1346 free(q);
1347 }
1348 free(coverage);
1349 }
1350
1351 struct EnumeratorArg {
1352 CoverageForeachFunction f;
1353 void * p;
1354 };
1355
1356 static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1357 struct EnumeratorArg * enumerator_arg = arg;
1358 enumerator_arg->f(entry->value, i, enumerator_arg->p);
1359 return 0;
1360 }
1361
1362 void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1363 struct EnumeratorArg enumerator_arg;
1364 enumerator_arg.f = f;
1365 enumerator_arg.p = p;
1366 JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1367 }
1368
1369 int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1370 int result = 0;
1371
1372 jschar * base = js_InflateString(context, (char *) json, &length);
1373 if (base == NULL) {
1374 fatal("out of memory");
1375 }
1376
1377 jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1378 parenthesized_json[0] = '(';
1379 memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1380 parenthesized_json[length + 1] = ')';
1381
1382 JS_free(context, base);
1383
1384 JSParseContext parse_context;
1385 if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1386 free(parenthesized_json);
1387 return -1;
1388 }
1389 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1390 free(parenthesized_json);
1391 if (root == NULL) {
1392 result = -1;
1393 goto done;
1394 }
1395
1396 /* root node must be TOK_LC */
1397 if (root->pn_type != TOK_LC) {
1398 result = -1;
1399 goto done;
1400 }
1401 JSParseNode * semi = root->pn_u.list.head;
1402
1403 /* the list must be TOK_SEMI and it must contain only one element */
1404 if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1405 result = -1;
1406 goto done;
1407 }
1408 JSParseNode * parenthesized = semi->pn_kid;
1409
1410 /* this must be a parenthesized expression */
1411 if (parenthesized->pn_type != TOK_RP) {
1412 result = -1;
1413 goto done;
1414 }
1415 JSParseNode * object = parenthesized->pn_kid;
1416
1417 /* this must be an object literal */
1418 if (object->pn_type != TOK_RC) {
1419 result = -1;
1420 goto done;
1421 }
1422
1423 for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1424 /* every element of this list must be TOK_COLON */
1425 if (p->pn_type != TOK_COLON) {
1426 result = -1;
1427 goto done;
1428 }
1429
1430 /* the key must be a string representing the file */
1431 JSParseNode * key = p->pn_left;
1432 if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1433 result = -1;
1434 goto done;
1435 }
1436 char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1437
1438 /* the value must be an object literal OR an array */
1439 JSParseNode * value = p->pn_right;
1440 if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1441 result = -1;
1442 goto done;
1443 }
1444
1445 JSParseNode * array = NULL;
1446 JSParseNode * source = NULL;
1447 if (value->pn_type == TOK_RB) {
1448 /* an array */
1449 array = value;
1450 }
1451 else if (value->pn_type == TOK_RC) {
1452 /* an object literal */
1453 if (value->pn_count != 2) {
1454 result = -1;
1455 goto done;
1456 }
1457 for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1458 if (element->pn_type != TOK_COLON) {
1459 result = -1;
1460 goto done;
1461 }
1462 JSParseNode * left = element->pn_left;
1463 if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1464 result = -1;
1465 goto done;
1466 }
1467 const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1468 if (strcmp(s, "coverage") == 0) {
1469 array = element->pn_right;
1470 if (array->pn_type != TOK_RB) {
1471 result = -1;
1472 goto done;
1473 }
1474 }
1475 else if (strcmp(s, "source") == 0) {
1476 source = element->pn_right;
1477 if (source->pn_type != TOK_RB) {
1478 result = -1;
1479 goto done;
1480 }
1481 }
1482 else {
1483 result = -1;
1484 goto done;
1485 }
1486 }
1487 }
1488 else {
1489 result = -1;
1490 goto done;
1491 }
1492
1493 if (array == NULL) {
1494 result = -1;
1495 goto done;
1496 }
1497
1498 /* look up the file in the coverage table */
1499 FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1500 if (file_coverage == NULL) {
1501 /* not there: create a new one */
1502 char * id = xstrdup(id_bytes);
1503 file_coverage = xmalloc(sizeof(FileCoverage));
1504 file_coverage->id = id;
1505 file_coverage->num_coverage_lines = array->pn_count;
1506 file_coverage->coverage_lines = xnew(int, array->pn_count);
1507 file_coverage->source_lines = NULL;
1508
1509 /* set coverage for all lines */
1510 uint32 i = 0;
1511 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1512 if (element->pn_type == TOK_NUMBER) {
1513 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1514 }
1515 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1516 file_coverage->coverage_lines[i] = -1;
1517 }
1518 else {
1519 result = -1;
1520 goto done;
1521 }
1522 }
1523 assert(i == array->pn_count);
1524
1525 /* add to the hash table */
1526 JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1527 struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1528 coverage_list->file_coverage = file_coverage;
1529 coverage_list->next = coverage->coverage_list;
1530 coverage->coverage_list = coverage_list;
1531 }
1532 else {
1533 /* sanity check */
1534 assert(strcmp(file_coverage->id, id_bytes) == 0);
1535 if (file_coverage->num_coverage_lines != array->pn_count) {
1536 result = -2;
1537 goto done;
1538 }
1539
1540 /* merge the coverage */
1541 uint32 i = 0;
1542 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1543 if (element->pn_type == TOK_NUMBER) {
1544 if (file_coverage->coverage_lines[i] == -1) {
1545 result = -2;
1546 goto done;
1547 }
1548 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1549 }
1550 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1551 if (file_coverage->coverage_lines[i] != -1) {
1552 result = -2;
1553 goto done;
1554 }
1555 }
1556 else {
1557 result = -1;
1558 goto done;
1559 }
1560 }
1561 assert(i == array->pn_count);
1562 }
1563
1564 /* if this JSON file has source, use it */
1565 if (file_coverage->source_lines == NULL && source != NULL) {
1566 file_coverage->num_source_lines = source->pn_count;
1567 file_coverage->source_lines = xnew(char *, source->pn_count);
1568 uint32 i = 0;
1569 for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1570 if (element->pn_type != TOK_STRING) {
1571 result = -1;
1572 goto done;
1573 }
1574 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1575 }
1576 assert(i == source->pn_count);
1577 }
1578 }
1579
1580 done:
1581 js_FinishParseContext(context, &parse_context);
1582 return result;
1583 }

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