/[jscoverage]/trunk/instrument-js.c
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Revision 246 - (show annotations)
Sun Oct 5 18:05:42 2008 UTC (10 years, 10 months ago) by siliconforks
File MIME type: text/plain
File size: 44506 byte(s)
Handle unusual whitespace in //#JSCOVERAGE_IF comments.
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 <jsatom.h>
30 #include <jsfun.h>
31 #include <jsinterp.h>
32 #include <jsparse.h>
33 #include <jsregexp.h>
34 #include <jsscope.h>
35 #include <jsstr.h>
36
37 #include "encoding.h"
38 #include "global.h"
39 #include "highlight.h"
40 #include "resource-manager.h"
41 #include "util.h"
42
43 struct IfDirective {
44 const jschar * condition_start;
45 const jschar * condition_end;
46 uint16_t start_line;
47 uint16_t end_line;
48 struct IfDirective * next;
49 };
50
51 static bool * exclusive_directives = NULL;
52
53 static JSRuntime * runtime = NULL;
54 static JSContext * context = NULL;
55 static JSObject * global = NULL;
56
57 /*
58 JSParseNode objects store line numbers starting from 1.
59 The lines array stores line numbers starting from 0.
60 */
61 static const char * file_id = NULL;
62 static char * lines = NULL;
63 static uint16_t num_lines = 0;
64
65 void jscoverage_init(void) {
66 runtime = JS_NewRuntime(8L * 1024L * 1024L);
67 if (runtime == NULL) {
68 fatal("cannot create runtime");
69 }
70
71 context = JS_NewContext(runtime, 8192);
72 if (context == NULL) {
73 fatal("cannot create context");
74 }
75
76 global = JS_NewObject(context, NULL, NULL, NULL);
77 if (global == NULL) {
78 fatal("cannot create global object");
79 }
80
81 if (! JS_InitStandardClasses(context, global)) {
82 fatal("cannot initialize standard classes");
83 }
84 }
85
86 void jscoverage_cleanup(void) {
87 JS_DestroyContext(context);
88 JS_DestroyRuntime(runtime);
89 }
90
91 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
92 for (size_t i = 0; i < num_characters; i++) {
93 jschar c = characters[i];
94 /*
95 XXX does not handle no-break space, other unicode "space separator"
96 */
97 switch (c) {
98 case 0x9:
99 case 0xB:
100 case 0xC:
101 Stream_write_char(f, c);
102 break;
103 default:
104 if (32 <= c && c <= 126) {
105 Stream_write_char(f, c);
106 }
107 else {
108 Stream_printf(f, "\\u%04x", c);
109 }
110 break;
111 }
112 }
113 }
114
115 static void print_string(JSString * s, Stream * f) {
116 size_t length = JSSTRING_LENGTH(s);
117 jschar * characters = JSSTRING_CHARS(s);
118 for (size_t i = 0; i < length; i++) {
119 jschar c = characters[i];
120 if (32 <= c && c <= 126) {
121 switch (c) {
122 case '"':
123 Stream_write_string(f, "\\\"");
124 break;
125 /*
126 case '\'':
127 Stream_write_string(f, "\\'");
128 break;
129 */
130 case '\\':
131 Stream_write_string(f, "\\\\");
132 break;
133 default:
134 Stream_write_char(f, c);
135 break;
136 }
137 }
138 else {
139 switch (c) {
140 case 0x8:
141 Stream_write_string(f, "\\b");
142 break;
143 case 0x9:
144 Stream_write_string(f, "\\t");
145 break;
146 case 0xa:
147 Stream_write_string(f, "\\n");
148 break;
149 case 0xb:
150 Stream_write_string(f, "\\v");
151 break;
152 case 0xc:
153 Stream_write_string(f, "\\f");
154 break;
155 case 0xd:
156 Stream_write_string(f, "\\r");
157 break;
158 default:
159 Stream_printf(f, "\\u%04x", c);
160 break;
161 }
162 }
163 }
164 }
165
166 static void print_string_atom(JSAtom * atom, Stream * f) {
167 assert(ATOM_IS_STRING(atom));
168 JSString * s = ATOM_TO_STRING(atom);
169 print_string(s, f);
170 }
171
172 static void print_regex(jsval value, Stream * f) {
173 assert(JSVAL_IS_STRING(value));
174 JSString * s = JSVAL_TO_STRING(value);
175 size_t length = JSSTRING_LENGTH(s);
176 jschar * characters = JSSTRING_CHARS(s);
177 for (size_t i = 0; i < length; i++) {
178 jschar c = characters[i];
179 if (32 <= c && c <= 126) {
180 Stream_write_char(f, c);
181 }
182 else {
183 Stream_printf(f, "\\u%04x", c);
184 }
185 }
186 }
187
188 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
189 assert(ATOM_IS_STRING(atom));
190 JSString * s = ATOM_TO_STRING(atom);
191 Stream_write_char(f, '"');
192 print_string(s, f);
193 Stream_write_char(f, '"');
194 }
195
196 static const char * get_op(uint8 op) {
197 switch(op) {
198 case JSOP_BITOR:
199 return "|";
200 case JSOP_BITXOR:
201 return "^";
202 case JSOP_BITAND:
203 return "&";
204 case JSOP_EQ:
205 return "==";
206 case JSOP_NE:
207 return "!=";
208 case JSOP_NEW_EQ:
209 return "===";
210 case JSOP_NEW_NE:
211 return "!==";
212 case JSOP_LT:
213 return "<";
214 case JSOP_LE:
215 return "<=";
216 case JSOP_GT:
217 return ">";
218 case JSOP_GE:
219 return ">=";
220 case JSOP_LSH:
221 return "<<";
222 case JSOP_RSH:
223 return ">>";
224 case JSOP_URSH:
225 return ">>>";
226 case JSOP_ADD:
227 return "+";
228 case JSOP_SUB:
229 return "-";
230 case JSOP_MUL:
231 return "*";
232 case JSOP_DIV:
233 return "/";
234 case JSOP_MOD:
235 return "%";
236 default:
237 abort();
238 }
239 }
240
241 static void instrument_expression(JSParseNode * node, Stream * f);
242 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
243
244 enum FunctionType {
245 FUNCTION_NORMAL,
246 FUNCTION_GETTER_OR_SETTER
247 };
248
249 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
250 assert(node->pn_arity == PN_FUNC);
251 assert(ATOM_IS_OBJECT(node->pn_funAtom));
252 JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);
253 assert(JS_ObjectIsFunction(context, object));
254 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
255 assert(function);
256 assert(object == function->object);
257 Stream_printf(f, "%*s", indent, "");
258 if (type == FUNCTION_NORMAL) {
259 Stream_write_string(f, "function");
260 }
261
262 /* function name */
263 if (function->atom) {
264 Stream_write_char(f, ' ');
265 print_string_atom(function->atom, f);
266 }
267
268 /* function parameters */
269 Stream_write_string(f, "(");
270 JSAtom ** params = xnew(JSAtom *, function->nargs);
271 for (int i = 0; i < function->nargs; i++) {
272 /* initialize to NULL for sanity check */
273 params[i] = NULL;
274 }
275 JSScope * scope = OBJ_SCOPE(object);
276 for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {
277 if (scope_property->getter != js_GetArgument) {
278 continue;
279 }
280 assert(scope_property->flags & SPROP_HAS_SHORTID);
281 assert((uint16) scope_property->shortid < function->nargs);
282 assert(JSID_IS_ATOM(scope_property->id));
283 params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);
284 }
285 for (int i = 0; i < function->nargs; i++) {
286 assert(params[i] != NULL);
287 if (i > 0) {
288 Stream_write_string(f, ", ");
289 }
290 if (ATOM_IS_STRING(params[i])) {
291 print_string_atom(params[i], f);
292 }
293 }
294 Stream_write_string(f, ") {\n");
295 free(params);
296
297 /* function body */
298 instrument_statement(node->pn_body, f, indent + 2, false);
299
300 Stream_write_string(f, "}\n");
301 }
302
303 static void instrument_function_call(JSParseNode * node, Stream * f) {
304 instrument_expression(node->pn_head, f);
305 Stream_write_char(f, '(');
306 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
307 if (p != node->pn_head->pn_next) {
308 Stream_write_string(f, ", ");
309 }
310 instrument_expression(p, f);
311 }
312 Stream_write_char(f, ')');
313 }
314
315 /*
316 See <Expressions> in jsparse.h.
317 TOK_FUNCTION is handled as a statement and as an expression.
318 TOK_DBLDOT is not handled (XML op).
319 TOK_DEFSHARP and TOK_USESHARP are not handled.
320 TOK_ANYNAME is not handled (XML op).
321 TOK_AT is not handled (XML op).
322 TOK_DBLCOLON is not handled.
323 TOK_XML* are not handled.
324 There seem to be some undocumented expressions:
325 TOK_INSTANCEOF binary
326 TOK_IN binary
327 */
328 static void instrument_expression(JSParseNode * node, Stream * f) {
329 switch (node->pn_type) {
330 case TOK_FUNCTION:
331 instrument_function(node, f, 0, FUNCTION_NORMAL);
332 break;
333 case TOK_COMMA:
334 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
335 if (p != node->pn_head) {
336 Stream_write_string(f, ", ");
337 }
338 instrument_expression(p, f);
339 }
340 break;
341 case TOK_ASSIGN:
342 instrument_expression(node->pn_left, f);
343 Stream_write_char(f, ' ');
344 switch (node->pn_op) {
345 case JSOP_ADD:
346 case JSOP_SUB:
347 case JSOP_MUL:
348 case JSOP_MOD:
349 case JSOP_LSH:
350 case JSOP_RSH:
351 case JSOP_URSH:
352 case JSOP_BITAND:
353 case JSOP_BITOR:
354 case JSOP_BITXOR:
355 case JSOP_DIV:
356 Stream_printf(f, "%s", get_op(node->pn_op));
357 break;
358 default:
359 /* do nothing - it must be a simple assignment */
360 break;
361 }
362 Stream_write_string(f, "= ");
363 instrument_expression(node->pn_right, f);
364 break;
365 case TOK_HOOK:
366 instrument_expression(node->pn_kid1, f);
367 Stream_write_string(f, "? ");
368 instrument_expression(node->pn_kid2, f);
369 Stream_write_string(f, ": ");
370 instrument_expression(node->pn_kid3, f);
371 break;
372 case TOK_OR:
373 instrument_expression(node->pn_left, f);
374 Stream_write_string(f, " || ");
375 instrument_expression(node->pn_right, f);
376 break;
377 case TOK_AND:
378 instrument_expression(node->pn_left, f);
379 Stream_write_string(f, " && ");
380 instrument_expression(node->pn_right, f);
381 break;
382 case TOK_BITOR:
383 case TOK_BITXOR:
384 case TOK_BITAND:
385 case TOK_EQOP:
386 case TOK_RELOP:
387 case TOK_SHOP:
388 case TOK_PLUS:
389 case TOK_MINUS:
390 case TOK_STAR:
391 case TOK_DIVOP:
392 switch (node->pn_arity) {
393 case PN_BINARY:
394 instrument_expression(node->pn_left, f);
395 Stream_printf(f, " %s ", get_op(node->pn_op));
396 instrument_expression(node->pn_right, f);
397 break;
398 case PN_LIST:
399 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
400 if (p != node->pn_head) {
401 Stream_printf(f, " %s ", get_op(node->pn_op));
402 }
403 instrument_expression(p, f);
404 }
405 break;
406 default:
407 abort();
408 }
409 break;
410 case TOK_UNARYOP:
411 switch (node->pn_op) {
412 case JSOP_NEG:
413 Stream_write_char(f, '-');
414 instrument_expression(node->pn_kid, f);
415 break;
416 case JSOP_POS:
417 Stream_write_char(f, '+');
418 instrument_expression(node->pn_kid, f);
419 break;
420 case JSOP_NOT:
421 Stream_write_char(f, '!');
422 instrument_expression(node->pn_kid, f);
423 break;
424 case JSOP_BITNOT:
425 Stream_write_char(f, '~');
426 instrument_expression(node->pn_kid, f);
427 break;
428 case JSOP_TYPEOF:
429 Stream_write_string(f, "typeof ");
430 instrument_expression(node->pn_kid, f);
431 break;
432 case JSOP_VOID:
433 Stream_write_string(f, "void ");
434 instrument_expression(node->pn_kid, f);
435 break;
436 default:
437 abort();
438 break;
439 }
440 break;
441 case TOK_INC:
442 case TOK_DEC:
443 /*
444 This is not documented, but node->pn_op tells whether it is pre- or post-increment.
445 */
446 switch (node->pn_op) {
447 case JSOP_INCNAME:
448 case JSOP_INCPROP:
449 case JSOP_INCELEM:
450 Stream_write_string(f, "++");
451 instrument_expression(node->pn_kid, f);
452 break;
453 case JSOP_DECNAME:
454 case JSOP_DECPROP:
455 case JSOP_DECELEM:
456 Stream_write_string(f, "--");
457 instrument_expression(node->pn_kid, f);
458 break;
459 case JSOP_NAMEINC:
460 case JSOP_PROPINC:
461 case JSOP_ELEMINC:
462 instrument_expression(node->pn_kid, f);
463 Stream_write_string(f, "++");
464 break;
465 case JSOP_NAMEDEC:
466 case JSOP_PROPDEC:
467 case JSOP_ELEMDEC:
468 instrument_expression(node->pn_kid, f);
469 Stream_write_string(f, "--");
470 break;
471 default:
472 abort();
473 break;
474 }
475 break;
476 case TOK_NEW:
477 Stream_write_string(f, "new ");
478 instrument_function_call(node, f);
479 break;
480 case TOK_DELETE:
481 Stream_write_string(f, "delete ");
482 instrument_expression(node->pn_kid, f);
483 break;
484 case TOK_DOT:
485 /*
486 This may have originally been x['foo-bar']. Because the string 'foo-bar'
487 contains illegal characters, we have to use the subscript syntax instead of
488 the dot syntax.
489 */
490 instrument_expression(node->pn_expr, f);
491 assert(ATOM_IS_STRING(node->pn_atom));
492 {
493 JSString * s = ATOM_TO_STRING(node->pn_atom);
494 /* XXX - semantics changed in 1.7 */
495 if (! ATOM_KEYWORD(node->pn_atom) && js_IsIdentifier(s)) {
496 Stream_write_char(f, '.');
497 print_string_atom(node->pn_atom, f);
498 }
499 else {
500 Stream_write_char(f, '[');
501 print_quoted_string_atom(node->pn_atom, f);
502 Stream_write_char(f, ']');
503 }
504 }
505 break;
506 case TOK_LB:
507 instrument_expression(node->pn_left, f);
508 Stream_write_char(f, '[');
509 instrument_expression(node->pn_right, f);
510 Stream_write_char(f, ']');
511 break;
512 case TOK_LP:
513 instrument_function_call(node, f);
514 break;
515 case TOK_RB:
516 Stream_write_char(f, '[');
517 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
518 if (p != node->pn_head) {
519 Stream_write_string(f, ", ");
520 }
521 /* TOK_COMMA is a special case: a hole in the array */
522 if (p->pn_type != TOK_COMMA) {
523 instrument_expression(p, f);
524 }
525 }
526 if (node->pn_extra == PNX_ENDCOMMA) {
527 Stream_write_char(f, ',');
528 }
529 Stream_write_char(f, ']');
530 break;
531 case TOK_RC:
532 Stream_write_char(f, '{');
533 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
534 assert(p->pn_type == TOK_COLON);
535 if (p != node->pn_head) {
536 Stream_write_string(f, ", ");
537 }
538
539 /* check whether this is a getter or setter */
540 switch (p->pn_op) {
541 case JSOP_GETTER:
542 Stream_write_string(f, "get ");
543 instrument_expression(p->pn_left, f);
544 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
545 break;
546 case JSOP_SETTER:
547 Stream_write_string(f, "set ");
548 instrument_expression(p->pn_left, f);
549 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
550 break;
551 default:
552 instrument_expression(p->pn_left, f);
553 Stream_write_string(f, ": ");
554 instrument_expression(p->pn_right, f);
555 break;
556 }
557 }
558 Stream_write_char(f, '}');
559 break;
560 case TOK_RP:
561 Stream_write_char(f, '(');
562 instrument_expression(node->pn_kid, f);
563 Stream_write_char(f, ')');
564 break;
565 case TOK_NAME:
566 print_string_atom(node->pn_atom, f);
567 break;
568 case TOK_STRING:
569 print_quoted_string_atom(node->pn_atom, f);
570 break;
571 case TOK_OBJECT:
572 switch (node->pn_op) {
573 case JSOP_OBJECT:
574 /* I assume this is JSOP_REGEXP */
575 abort();
576 break;
577 case JSOP_REGEXP:
578 assert(ATOM_IS_OBJECT(node->pn_atom));
579 {
580 JSObject * object = ATOM_TO_OBJECT(node->pn_atom);
581 jsval result;
582 js_regexp_toString(context, object, 0, NULL, &result);
583 print_regex(result, f);
584 }
585 break;
586 default:
587 abort();
588 break;
589 }
590 break;
591 case TOK_NUMBER:
592 /*
593 A 64-bit IEEE 754 floating point number has a 52-bit fraction.
594 2^(-52) = 2.22 x 10^(-16)
595 Thus there are 16 significant digits.
596 To keep the output simple, special-case zero.
597 */
598 if (node->pn_dval == 0.0) {
599 Stream_write_string(f, "0");
600 }
601 else {
602 Stream_printf(f, "%.15g", node->pn_dval);
603 }
604 break;
605 case TOK_PRIMARY:
606 switch (node->pn_op) {
607 case JSOP_TRUE:
608 Stream_write_string(f, "true");
609 break;
610 case JSOP_FALSE:
611 Stream_write_string(f, "false");
612 break;
613 case JSOP_NULL:
614 Stream_write_string(f, "null");
615 break;
616 case JSOP_THIS:
617 Stream_write_string(f, "this");
618 break;
619 /* jsscan.h mentions `super' ??? */
620 default:
621 abort();
622 }
623 break;
624 case TOK_INSTANCEOF:
625 instrument_expression(node->pn_left, f);
626 Stream_write_string(f, " instanceof ");
627 instrument_expression(node->pn_right, f);
628 break;
629 case TOK_IN:
630 instrument_expression(node->pn_left, f);
631 Stream_write_string(f, " in ");
632 instrument_expression(node->pn_right, f);
633 break;
634 default:
635 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
636 }
637 }
638
639 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
640 assert(node->pn_arity == PN_LIST);
641 Stream_printf(f, "%*s", indent, "");
642 Stream_write_string(f, "var ");
643 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
644 assert(p->pn_type == TOK_NAME);
645 assert(p->pn_arity == PN_NAME);
646 if (p != node->pn_head) {
647 Stream_write_string(f, ", ");
648 }
649 print_string_atom(p->pn_atom, f);
650 if (p->pn_expr != NULL) {
651 Stream_write_string(f, " = ");
652 instrument_expression(p->pn_expr, f);
653 }
654 }
655 }
656
657 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
658 switch (node->pn_type) {
659 case TOK_FUNCTION:
660 instrument_function(node, f, indent, FUNCTION_NORMAL);
661 break;
662 case TOK_LC:
663 assert(node->pn_arity == PN_LIST);
664 /*
665 Stream_write_string(f, "{\n");
666 */
667 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
668 instrument_statement(p, f, indent, false);
669 }
670 /*
671 Stream_printf(f, "%*s", indent, "");
672 Stream_write_string(f, "}\n");
673 */
674 break;
675 case TOK_IF:
676 {
677 assert(node->pn_arity == PN_TERNARY);
678
679 uint16_t line = node->pn_pos.begin.lineno;
680 if (! is_jscoverage_if) {
681 if (line > num_lines) {
682 fatal("%s: script contains more than 65,535 lines", file_id);
683 }
684 if (line >= 2 && exclusive_directives[line - 2]) {
685 is_jscoverage_if = true;
686 }
687 }
688
689 Stream_printf(f, "%*s", indent, "");
690 Stream_write_string(f, "if (");
691 instrument_expression(node->pn_kid1, f);
692 Stream_write_string(f, ") {\n");
693 if (is_jscoverage_if && node->pn_kid3) {
694 uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
695 uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
696 Stream_printf(f, "%*s", indent + 2, "");
697 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
698 }
699 instrument_statement(node->pn_kid2, f, indent + 2, false);
700 Stream_printf(f, "%*s", indent, "");
701 Stream_write_string(f, "}\n");
702
703 if (node->pn_kid3 || is_jscoverage_if) {
704 Stream_printf(f, "%*s", indent, "");
705 Stream_write_string(f, "else {\n");
706
707 if (is_jscoverage_if) {
708 uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
709 uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
710 Stream_printf(f, "%*s", indent + 2, "");
711 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
712 }
713
714 if (node->pn_kid3) {
715 instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
716 }
717
718 Stream_printf(f, "%*s", indent, "");
719 Stream_write_string(f, "}\n");
720 }
721
722 break;
723 }
724 case TOK_SWITCH:
725 assert(node->pn_arity == PN_BINARY);
726 Stream_printf(f, "%*s", indent, "");
727 Stream_write_string(f, "switch (");
728 instrument_expression(node->pn_left, f);
729 Stream_write_string(f, ") {\n");
730 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
731 Stream_printf(f, "%*s", indent, "");
732 switch (p->pn_type) {
733 case TOK_CASE:
734 Stream_write_string(f, "case ");
735 instrument_expression(p->pn_left, f);
736 Stream_write_string(f, ":\n");
737 break;
738 case TOK_DEFAULT:
739 Stream_write_string(f, "default:\n");
740 break;
741 default:
742 abort();
743 break;
744 }
745 instrument_statement(p->pn_right, f, indent + 2, false);
746 }
747 Stream_printf(f, "%*s", indent, "");
748 Stream_write_string(f, "}\n");
749 break;
750 case TOK_CASE:
751 case TOK_DEFAULT:
752 abort();
753 break;
754 case TOK_WHILE:
755 assert(node->pn_arity == PN_BINARY);
756 Stream_printf(f, "%*s", indent, "");
757 Stream_write_string(f, "while (");
758 instrument_expression(node->pn_left, f);
759 Stream_write_string(f, ") {\n");
760 instrument_statement(node->pn_right, f, indent + 2, false);
761 Stream_write_string(f, "}\n");
762 break;
763 case TOK_DO:
764 assert(node->pn_arity == PN_BINARY);
765 Stream_printf(f, "%*s", indent, "");
766 Stream_write_string(f, "do {\n");
767 instrument_statement(node->pn_left, f, indent + 2, false);
768 Stream_write_string(f, "}\n");
769 Stream_printf(f, "%*s", indent, "");
770 Stream_write_string(f, "while (");
771 instrument_expression(node->pn_right, f);
772 Stream_write_string(f, ");\n");
773 break;
774 case TOK_FOR:
775 assert(node->pn_arity == PN_BINARY);
776 Stream_printf(f, "%*s", indent, "");
777 Stream_write_string(f, "for (");
778 switch (node->pn_left->pn_type) {
779 case TOK_IN:
780 /* for/in */
781 assert(node->pn_left->pn_arity == PN_BINARY);
782 switch (node->pn_left->pn_left->pn_type) {
783 case TOK_VAR:
784 instrument_var_statement(node->pn_left->pn_left, f, 0);
785 break;
786 case TOK_NAME:
787 instrument_expression(node->pn_left->pn_left, f);
788 break;
789 default:
790 /* this is undocumented: for (x.value in y) */
791 instrument_expression(node->pn_left->pn_left, f);
792 break;
793 /*
794 default:
795 fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
796 abort();
797 break;
798 */
799 }
800 Stream_write_string(f, " in ");
801 instrument_expression(node->pn_left->pn_right, f);
802 break;
803 case TOK_RESERVED:
804 /* for (;;) */
805 assert(node->pn_left->pn_arity == PN_TERNARY);
806 if (node->pn_left->pn_kid1) {
807 if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {
808 instrument_var_statement(node->pn_left->pn_kid1, f, 0);
809 }
810 else {
811 instrument_expression(node->pn_left->pn_kid1, f);
812 }
813 }
814 Stream_write_string(f, ";");
815 if (node->pn_left->pn_kid2) {
816 Stream_write_char(f, ' ');
817 instrument_expression(node->pn_left->pn_kid2, f);
818 }
819 Stream_write_string(f, ";");
820 if (node->pn_left->pn_kid3) {
821 Stream_write_char(f, ' ');
822 instrument_expression(node->pn_left->pn_kid3, f);
823 }
824 break;
825 default:
826 abort();
827 break;
828 }
829 Stream_write_string(f, ") {\n");
830 instrument_statement(node->pn_right, f, indent + 2, false);
831 Stream_write_string(f, "}\n");
832 break;
833 case TOK_THROW:
834 assert(node->pn_arity == PN_UNARY);
835 Stream_printf(f, "%*s", indent, "");
836 Stream_write_string(f, "throw ");
837 instrument_expression(node->pn_u.unary.kid, f);
838 Stream_write_string(f, ";\n");
839 break;
840 case TOK_TRY:
841 Stream_printf(f, "%*s", indent, "");
842 Stream_write_string(f, "try {\n");
843 instrument_statement(node->pn_kid1, f, indent + 2, false);
844 Stream_printf(f, "%*s", indent, "");
845 Stream_write_string(f, "}\n");
846 {
847 for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {
848 assert(catch->pn_type == TOK_CATCH);
849 Stream_printf(f, "%*s", indent, "");
850 Stream_write_string(f, "catch (");
851 assert(catch->pn_kid1->pn_arity == PN_NAME);
852 print_string_atom(catch->pn_kid1->pn_atom, f);
853 if (catch->pn_kid1->pn_expr) {
854 Stream_write_string(f, " if ");
855 instrument_expression(catch->pn_kid1->pn_expr, f);
856 }
857 Stream_write_string(f, ") {\n");
858 instrument_statement(catch->pn_kid3, f, indent + 2, false);
859 Stream_printf(f, "%*s", indent, "");
860 Stream_write_string(f, "}\n");
861 }
862 }
863 if (node->pn_kid3) {
864 Stream_printf(f, "%*s", indent, "");
865 Stream_write_string(f, "finally {\n");
866 instrument_statement(node->pn_kid3, f, indent + 2, false);
867 Stream_printf(f, "%*s", indent, "");
868 Stream_write_string(f, "}\n");
869 }
870 break;
871 case TOK_CATCH:
872 abort();
873 break;
874 case TOK_BREAK:
875 case TOK_CONTINUE:
876 assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
877 Stream_printf(f, "%*s", indent, "");
878 Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
879 JSAtom * atom = node->pn_u.name.atom;
880 if (atom != NULL) {
881 Stream_write_char(f, ' ');
882 print_string_atom(node->pn_atom, f);
883 }
884 Stream_write_string(f, ";\n");
885 break;
886 case TOK_WITH:
887 assert(node->pn_arity == PN_BINARY);
888 Stream_printf(f, "%*s", indent, "");
889 Stream_write_string(f, "with (");
890 instrument_expression(node->pn_left, f);
891 Stream_write_string(f, ") {\n");
892 instrument_statement(node->pn_right, f, indent + 2, false);
893 Stream_printf(f, "%*s", indent, "");
894 Stream_write_string(f, "}\n");
895 break;
896 case TOK_VAR:
897 instrument_var_statement(node, f, indent);
898 Stream_write_string(f, ";\n");
899 break;
900 case TOK_RETURN:
901 assert(node->pn_arity == PN_UNARY);
902 Stream_printf(f, "%*s", indent, "");
903 Stream_write_string(f, "return");
904 if (node->pn_kid != NULL) {
905 Stream_write_char(f, ' ');
906 instrument_expression(node->pn_kid, f);
907 }
908 Stream_write_string(f, ";\n");
909 break;
910 case TOK_SEMI:
911 assert(node->pn_arity == PN_UNARY);
912 Stream_printf(f, "%*s", indent, "");
913 if (node->pn_kid != NULL) {
914 instrument_expression(node->pn_kid, f);
915 }
916 Stream_write_string(f, ";\n");
917 break;
918 case TOK_COLON:
919 assert(node->pn_arity == PN_NAME);
920 /*
921 This one is tricky: can't output instrumentation between the label and the
922 statement it's supposed to label ...
923 */
924 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
925 print_string_atom(node->pn_atom, f);
926 Stream_write_string(f, ":\n");
927 /*
928 ... use output_statement instead of instrument_statement.
929 */
930 output_statement(node->pn_expr, f, indent, false);
931 break;
932 default:
933 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
934 }
935 }
936
937 /*
938 See <Statements> in jsparse.h.
939 TOK_FUNCTION is handled as a statement and as an expression.
940 TOK_EXPORT, TOK_IMPORT are not handled.
941 */
942 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
943 if (node->pn_type != TOK_LC) {
944 uint16_t line = node->pn_pos.begin.lineno;
945 if (line > num_lines) {
946 fatal("%s: script contains more than 65,535 lines", file_id);
947 }
948
949 /* the root node has line number 0 */
950 if (line != 0) {
951 Stream_printf(f, "%*s", indent, "");
952 Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
953 lines[line - 1] = 1;
954 }
955 }
956 output_statement(node, f, indent, is_jscoverage_if);
957 }
958
959 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
960 const jschar * characters_end = characters + line_end;
961 const jschar * cp = characters + line_start;
962 const char * bp = prefix;
963 for (;;) {
964 if (*bp == '\0') {
965 return true;
966 }
967 else if (cp == characters_end) {
968 return false;
969 }
970 else if (*cp != *bp) {
971 return false;
972 }
973 bp++;
974 cp++;
975 }
976 }
977
978 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
979 /* XXX - other Unicode space */
980 const jschar * end = characters + line_end;
981 for (const jschar * p = characters + line_start; p < end; p++) {
982 jschar c = *p;
983 if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
984 continue;
985 }
986 else {
987 return false;
988 }
989 }
990 return true;
991 }
992
993 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
994 file_id = id;
995
996 /* scan the javascript */
997 JSTokenStream * token_stream = js_NewTokenStream(context, characters, num_characters, NULL, 1, NULL);
998 if (token_stream == NULL) {
999 fatal("cannot create token stream from file: %s", file_id);
1000 }
1001
1002 /* parse the javascript */
1003 JSParseNode * node = js_ParseTokenStream(context, global, token_stream);
1004 if (node == NULL) {
1005 fatal("parse error in file: %s", file_id);
1006 }
1007 num_lines = node->pn_pos.end.lineno;
1008 lines = xmalloc(num_lines);
1009 for (unsigned int i = 0; i < num_lines; i++) {
1010 lines[i] = 0;
1011 }
1012
1013 /* search code for conditionals */
1014 exclusive_directives = xnew(bool, num_lines);
1015 for (unsigned int i = 0; i < num_lines; i++) {
1016 exclusive_directives[i] = false;
1017 }
1018
1019 bool has_conditionals = false;
1020 struct IfDirective * if_directives = NULL;
1021 size_t line_number = 0;
1022 size_t i = 0;
1023 while (i < num_characters) {
1024 if (line_number == UINT16_MAX) {
1025 fatal("%s: script has more than 65,535 lines", file_id);
1026 }
1027 line_number++;
1028 size_t line_start = i;
1029 jschar c;
1030 bool done = false;
1031 while (! done && i < num_characters) {
1032 c = characters[i];
1033 switch (c) {
1034 case '\r':
1035 case '\n':
1036 case 0x2028:
1037 case 0x2029:
1038 done = true;
1039 break;
1040 default:
1041 i++;
1042 }
1043 }
1044 size_t line_end = i;
1045 if (i < num_characters) {
1046 i++;
1047 if (c == '\r' && i < num_characters && characters[i] == '\n') {
1048 i++;
1049 }
1050 }
1051
1052 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1053 has_conditionals = true;
1054
1055 if (characters_are_white_space(characters, line_start + 16, line_end)) {
1056 exclusive_directives[line_number - 1] = true;
1057 }
1058 else {
1059 struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1060 if_directive->condition_start = characters + line_start + 16;
1061 if_directive->condition_end = characters + line_end;
1062 if_directive->start_line = line_number;
1063 if_directive->end_line = 0;
1064 if_directive->next = if_directives;
1065 if_directives = if_directive;
1066 }
1067 }
1068 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1069 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1070 if (p->end_line == 0) {
1071 p->end_line = line_number;
1072 break;
1073 }
1074 }
1075 }
1076 }
1077
1078 /*
1079 An instrumented JavaScript file has 4 sections:
1080 1. initialization
1081 2. instrumented source code
1082 3. conditionals
1083 4. original source code
1084 */
1085
1086 Stream * instrumented = Stream_new(0);
1087 instrument_statement(node, instrumented, 0, false);
1088
1089 /* write line number info to the output */
1090 Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1091 Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1092 Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1093 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1094 Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1095 for (int i = 0; i < num_lines; i++) {
1096 if (lines[i]) {
1097 Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1098 }
1099 }
1100 Stream_write_string(output, "}\n");
1101 free(lines);
1102 lines = NULL;
1103 free(exclusive_directives);
1104 exclusive_directives = NULL;
1105
1106 /* conditionals */
1107 if (has_conditionals) {
1108 Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1109 }
1110
1111 /* copy the instrumented source code to the output */
1112 Stream_write(output, instrumented->data, instrumented->length);
1113
1114 /* conditionals */
1115 for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1116 Stream_write_string(output, "if (!(");
1117 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1118 Stream_write_string(output, ")) {\n");
1119 Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1120 Stream_write_string(output, "}\n");
1121 }
1122
1123 /* free */
1124 while (if_directives != NULL) {
1125 struct IfDirective * if_directive = if_directives;
1126 if_directives = if_directives->next;
1127 free(if_directive);
1128 }
1129
1130 /* copy the original source to the output */
1131 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1132 jscoverage_write_source(id, characters, num_characters, output);
1133 Stream_printf(output, ";\n");
1134
1135 Stream_delete(instrumented);
1136
1137 file_id = NULL;
1138 }
1139
1140 void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1141 Stream_write_string(output, "[");
1142 if (jscoverage_highlight) {
1143 Stream * highlighted_stream = Stream_new(num_characters);
1144 jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1145 size_t i = 0;
1146 while (i < highlighted_stream->length) {
1147 if (i > 0) {
1148 Stream_write_char(output, ',');
1149 }
1150
1151 Stream_write_char(output, '"');
1152 bool done = false;
1153 while (! done) {
1154 char c = highlighted_stream->data[i];
1155 switch (c) {
1156 case 0x8:
1157 /* backspace */
1158 Stream_write_string(output, "\\b");
1159 break;
1160 case 0x9:
1161 /* horizontal tab */
1162 Stream_write_string(output, "\\t");
1163 break;
1164 case 0xa:
1165 /* line feed (new line) */
1166 done = true;
1167 break;
1168 case 0xb:
1169 /* vertical tab */
1170 Stream_write_string(output, "\\v");
1171 break;
1172 case 0xc:
1173 /* form feed */
1174 Stream_write_string(output, "\\f");
1175 break;
1176 case 0xd:
1177 /* carriage return */
1178 done = true;
1179 if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1180 i++;
1181 }
1182 break;
1183 case '"':
1184 Stream_write_string(output, "\\\"");
1185 break;
1186 case '\\':
1187 Stream_write_string(output, "\\\\");
1188 break;
1189 default:
1190 Stream_write_char(output, c);
1191 break;
1192 }
1193 i++;
1194 if (i >= highlighted_stream->length) {
1195 done = true;
1196 }
1197 }
1198 Stream_write_char(output, '"');
1199 }
1200 Stream_delete(highlighted_stream);
1201 }
1202 else {
1203 size_t i = 0;
1204 while (i < num_characters) {
1205 if (i > 0) {
1206 Stream_write_char(output, ',');
1207 }
1208
1209 Stream_write_char(output, '"');
1210 bool done = false;
1211 while (! done) {
1212 jschar c = characters[i];
1213 switch (c) {
1214 case 0x8:
1215 /* backspace */
1216 Stream_write_string(output, "\\b");
1217 break;
1218 case 0x9:
1219 /* horizontal tab */
1220 Stream_write_string(output, "\\t");
1221 break;
1222 case 0xa:
1223 /* line feed (new line) */
1224 done = true;
1225 break;
1226 case 0xb:
1227 /* vertical tab */
1228 Stream_write_string(output, "\\v");
1229 break;
1230 case 0xc:
1231 /* form feed */
1232 Stream_write_string(output, "\\f");
1233 break;
1234 case 0xd:
1235 /* carriage return */
1236 done = true;
1237 if (i + 1 < num_characters && characters[i + 1] == '\n') {
1238 i++;
1239 }
1240 break;
1241 case '"':
1242 Stream_write_string(output, "\\\"");
1243 break;
1244 case '\\':
1245 Stream_write_string(output, "\\\\");
1246 break;
1247 case '&':
1248 Stream_write_string(output, "&amp;");
1249 break;
1250 case '<':
1251 Stream_write_string(output, "&lt;");
1252 break;
1253 case '>':
1254 Stream_write_string(output, "&gt;");
1255 break;
1256 case 0x2028:
1257 case 0x2029:
1258 done = true;
1259 break;
1260 default:
1261 if (32 <= c && c <= 126) {
1262 Stream_write_char(output, c);
1263 }
1264 else {
1265 Stream_printf(output, "&#%d;", c);
1266 }
1267 break;
1268 }
1269 i++;
1270 if (i >= num_characters) {
1271 done = true;
1272 }
1273 }
1274 Stream_write_char(output, '"');
1275 }
1276 }
1277 Stream_write_string(output, "]");
1278 }
1279
1280 void jscoverage_copy_resources(const char * destination_directory) {
1281 copy_resource("jscoverage.html", destination_directory);
1282 copy_resource("jscoverage.css", destination_directory);
1283 copy_resource("jscoverage.js", destination_directory);
1284 copy_resource("jscoverage-ie.css", destination_directory);
1285 copy_resource("jscoverage-throbber.gif", destination_directory);
1286 copy_resource("jscoverage-highlight.css", destination_directory);
1287 }
1288
1289 /*
1290 coverage reports
1291 */
1292
1293 struct FileCoverageList {
1294 FileCoverage * file_coverage;
1295 struct FileCoverageList * next;
1296 };
1297
1298 struct Coverage {
1299 JSHashTable * coverage_table;
1300 struct FileCoverageList * coverage_list;
1301 };
1302
1303 static int compare_strings(const void * p1, const void * p2) {
1304 return strcmp(p1, p2) == 0;
1305 }
1306
1307 Coverage * Coverage_new(void) {
1308 Coverage * result = xmalloc(sizeof(Coverage));
1309 result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1310 if (result->coverage_table == NULL) {
1311 fatal("cannot create hash table");
1312 }
1313 result->coverage_list = NULL;
1314 return result;
1315 }
1316
1317 void Coverage_delete(Coverage * coverage) {
1318 JS_HashTableDestroy(coverage->coverage_table);
1319 struct FileCoverageList * p = coverage->coverage_list;
1320 while (p != NULL) {
1321 free(p->file_coverage->coverage_lines);
1322 if (p->file_coverage->source_lines != NULL) {
1323 for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1324 free(p->file_coverage->source_lines[i]);
1325 }
1326 free(p->file_coverage->source_lines);
1327 }
1328 free(p->file_coverage->id);
1329 free(p->file_coverage);
1330 struct FileCoverageList * q = p;
1331 p = p->next;
1332 free(q);
1333 }
1334 free(coverage);
1335 }
1336
1337 struct EnumeratorArg {
1338 CoverageForeachFunction f;
1339 void * p;
1340 };
1341
1342 static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1343 struct EnumeratorArg * enumerator_arg = arg;
1344 enumerator_arg->f(entry->value, i, enumerator_arg->p);
1345 return 0;
1346 }
1347
1348 void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1349 struct EnumeratorArg enumerator_arg;
1350 enumerator_arg.f = f;
1351 enumerator_arg.p = p;
1352 JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1353 }
1354
1355 int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1356 jschar * base = js_InflateString(context, (char *) json, &length);
1357 if (base == NULL) {
1358 fatal("out of memory");
1359 }
1360
1361 jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1362 parenthesized_json[0] = '(';
1363 memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1364 parenthesized_json[length + 1] = ')';
1365
1366 JS_free(context, base);
1367
1368 JSTokenStream * token_stream = js_NewTokenStream(context, parenthesized_json, length + 2, NULL, 1, NULL);
1369 if (token_stream == NULL) {
1370 fatal("cannot create token stream");
1371 }
1372
1373 JSParseNode * root = js_ParseTokenStream(context, global, token_stream);
1374 free(parenthesized_json);
1375 if (root == NULL) {
1376 return -1;
1377 }
1378
1379 /* root node must be TOK_LC */
1380 if (root->pn_type != TOK_LC) {
1381 return -1;
1382 }
1383 JSParseNode * semi = root->pn_u.list.head;
1384
1385 /* the list must be TOK_SEMI and it must contain only one element */
1386 if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1387 return -1;
1388 }
1389 JSParseNode * parenthesized = semi->pn_kid;
1390
1391 /* this must be a parenthesized expression */
1392 if (parenthesized->pn_type != TOK_RP) {
1393 return -1;
1394 }
1395 JSParseNode * object = parenthesized->pn_kid;
1396
1397 /* this must be an object literal */
1398 if (object->pn_type != TOK_RC) {
1399 return -1;
1400 }
1401
1402 for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1403 /* every element of this list must be TOK_COLON */
1404 if (p->pn_type != TOK_COLON) {
1405 return -1;
1406 }
1407
1408 /* the key must be a string representing the file */
1409 JSParseNode * key = p->pn_left;
1410 if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1411 return -1;
1412 }
1413 char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1414
1415 /* the value must be an object literal OR an array */
1416 JSParseNode * value = p->pn_right;
1417 if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1418 return -1;
1419 }
1420
1421 JSParseNode * array = NULL;
1422 JSParseNode * source = NULL;
1423 if (value->pn_type == TOK_RB) {
1424 /* an array */
1425 array = value;
1426 }
1427 else if (value->pn_type == TOK_RC) {
1428 /* an object literal */
1429 if (value->pn_count != 2) {
1430 return -1;
1431 }
1432 for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1433 if (element->pn_type != TOK_COLON) {
1434 return -1;
1435 }
1436 JSParseNode * left = element->pn_left;
1437 if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1438 return -1;
1439 }
1440 const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1441 if (strcmp(s, "coverage") == 0) {
1442 array = element->pn_right;
1443 if (array->pn_type != TOK_RB) {
1444 return -1;
1445 }
1446 }
1447 else if (strcmp(s, "source") == 0) {
1448 source = element->pn_right;
1449 if (source->pn_type != TOK_RB) {
1450 return -1;
1451 }
1452 }
1453 else {
1454 return -1;
1455 }
1456 }
1457 }
1458 else {
1459 return -1;
1460 }
1461
1462 if (array == NULL) {
1463 return -1;
1464 }
1465
1466 /* look up the file in the coverage table */
1467 FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1468 if (file_coverage == NULL) {
1469 /* not there: create a new one */
1470 char * id = xstrdup(id_bytes);
1471 file_coverage = xmalloc(sizeof(FileCoverage));
1472 file_coverage->id = id;
1473 file_coverage->num_coverage_lines = array->pn_count;
1474 file_coverage->coverage_lines = xnew(int, array->pn_count);
1475 file_coverage->source_lines = NULL;
1476
1477 /* set coverage for all lines */
1478 uint32 i = 0;
1479 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1480 if (element->pn_type == TOK_NUMBER) {
1481 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1482 }
1483 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1484 file_coverage->coverage_lines[i] = -1;
1485 }
1486 else {
1487 return -1;
1488 }
1489 }
1490 assert(i == array->pn_count);
1491
1492 /* add to the hash table */
1493 JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1494 struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1495 coverage_list->file_coverage = file_coverage;
1496 coverage_list->next = coverage->coverage_list;
1497 coverage->coverage_list = coverage_list;
1498 }
1499 else {
1500 /* sanity check */
1501 assert(strcmp(file_coverage->id, id_bytes) == 0);
1502 if (file_coverage->num_coverage_lines != array->pn_count) {
1503 return -2;
1504 }
1505
1506 /* merge the coverage */
1507 uint32 i = 0;
1508 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1509 if (element->pn_type == TOK_NUMBER) {
1510 if (file_coverage->coverage_lines[i] == -1) {
1511 return -2;
1512 }
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 if (file_coverage->coverage_lines[i] != -1) {
1517 return -2;
1518 }
1519 }
1520 else {
1521 return -1;
1522 }
1523 }
1524 assert(i == array->pn_count);
1525 }
1526
1527 /* if this JSON file has source, use it */
1528 if (file_coverage->source_lines == NULL && source != NULL) {
1529 file_coverage->num_source_lines = source->pn_count;
1530 file_coverage->source_lines = xnew(char *, source->pn_count);
1531 uint32 i = 0;
1532 for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1533 if (element->pn_type != TOK_STRING) {
1534 return -1;
1535 }
1536 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1537 }
1538 assert(i == source->pn_count);
1539 }
1540 }
1541
1542 return 0;
1543 }

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