/[jscoverage]/trunk/instrument-js.cpp
ViewVC logotype

Contents of /trunk/instrument-js.cpp

Parent Directory Parent Directory | Revision Log Revision Log


Revision 336 - (show annotations)
Thu Oct 23 20:08:29 2008 UTC (10 years, 1 month ago) by siliconforks
Original Path: trunk/instrument-js.c
File MIME type: text/plain
File size: 45141 byte(s)
Update to work with SpiderMonkey 1.8.

1 /*
2 instrument-js.c - JavaScript instrumentation routines
3 Copyright (C) 2007, 2008 siliconforks.com
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 */
19
20 #include <config.h>
21
22 #include "instrument-js.h"
23
24 #include <assert.h>
25 #include <stdlib.h>
26 #include <string.h>
27
28 #include <jsapi.h>
29 #include <jsarena.h>
30 #include <jsatom.h>
31 #include <jsexn.h>
32 #include <jsfun.h>
33 #include <jsinterp.h>
34 #include <jsparse.h>
35 #include <jsregexp.h>
36 #include <jsscope.h>
37 #include <jsstr.h>
38
39 #include "encoding.h"
40 #include "global.h"
41 #include "highlight.h"
42 #include "resource-manager.h"
43 #include "util.h"
44
45 struct IfDirective {
46 const jschar * condition_start;
47 const jschar * condition_end;
48 uint16_t start_line;
49 uint16_t end_line;
50 struct IfDirective * next;
51 };
52
53 static bool * exclusive_directives = NULL;
54
55 static JSRuntime * runtime = NULL;
56 static JSContext * context = NULL;
57 static JSObject * global = NULL;
58
59 /*
60 JSParseNode objects store line numbers starting from 1.
61 The lines array stores line numbers starting from 0.
62 */
63 static const char * file_id = NULL;
64 static char * lines = NULL;
65 static uint16_t num_lines = 0;
66
67 void jscoverage_init(void) {
68 runtime = JS_NewRuntime(8L * 1024L * 1024L);
69 if (runtime == NULL) {
70 fatal("cannot create runtime");
71 }
72
73 context = JS_NewContext(runtime, 8192);
74 if (context == NULL) {
75 fatal("cannot create context");
76 }
77
78 global = JS_NewObject(context, NULL, NULL, NULL);
79 if (global == NULL) {
80 fatal("cannot create global object");
81 }
82
83 if (! JS_InitStandardClasses(context, global)) {
84 fatal("cannot initialize standard classes");
85 }
86 }
87
88 void jscoverage_cleanup(void) {
89 JS_DestroyContext(context);
90 JS_DestroyRuntime(runtime);
91 }
92
93 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
94 for (size_t i = 0; i < num_characters; i++) {
95 jschar c = characters[i];
96 /*
97 XXX does not handle no-break space, other unicode "space separator"
98 */
99 switch (c) {
100 case 0x9:
101 case 0xB:
102 case 0xC:
103 Stream_write_char(f, c);
104 break;
105 default:
106 if (32 <= c && c <= 126) {
107 Stream_write_char(f, c);
108 }
109 else {
110 Stream_printf(f, "\\u%04x", c);
111 }
112 break;
113 }
114 }
115 }
116
117 static void print_string(JSString * s, Stream * f) {
118 size_t length = JSSTRING_LENGTH(s);
119 jschar * characters = JSSTRING_CHARS(s);
120 for (size_t i = 0; i < length; i++) {
121 jschar c = characters[i];
122 if (32 <= c && c <= 126) {
123 switch (c) {
124 case '"':
125 Stream_write_string(f, "\\\"");
126 break;
127 /*
128 case '\'':
129 Stream_write_string(f, "\\'");
130 break;
131 */
132 case '\\':
133 Stream_write_string(f, "\\\\");
134 break;
135 default:
136 Stream_write_char(f, c);
137 break;
138 }
139 }
140 else {
141 switch (c) {
142 case 0x8:
143 Stream_write_string(f, "\\b");
144 break;
145 case 0x9:
146 Stream_write_string(f, "\\t");
147 break;
148 case 0xa:
149 Stream_write_string(f, "\\n");
150 break;
151 /* IE doesn't support this */
152 /*
153 case 0xb:
154 Stream_write_string(f, "\\v");
155 break;
156 */
157 case 0xc:
158 Stream_write_string(f, "\\f");
159 break;
160 case 0xd:
161 Stream_write_string(f, "\\r");
162 break;
163 default:
164 Stream_printf(f, "\\u%04x", c);
165 break;
166 }
167 }
168 }
169 }
170
171 static void print_string_atom(JSAtom * atom, Stream * f) {
172 assert(ATOM_IS_STRING(atom));
173 JSString * s = ATOM_TO_STRING(atom);
174 print_string(s, f);
175 }
176
177 static void print_regex(jsval value, Stream * f) {
178 assert(JSVAL_IS_STRING(value));
179 JSString * s = JSVAL_TO_STRING(value);
180 size_t length = JSSTRING_LENGTH(s);
181 jschar * characters = JSSTRING_CHARS(s);
182 for (size_t i = 0; i < length; i++) {
183 jschar c = characters[i];
184 if (32 <= c && c <= 126) {
185 Stream_write_char(f, c);
186 }
187 else {
188 Stream_printf(f, "\\u%04x", c);
189 }
190 }
191 }
192
193 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
194 assert(ATOM_IS_STRING(atom));
195 JSString * s = ATOM_TO_STRING(atom);
196 Stream_write_char(f, '"');
197 print_string(s, f);
198 Stream_write_char(f, '"');
199 }
200
201 static const char * get_op(uint8 op) {
202 switch(op) {
203 case JSOP_OR:
204 return "||";
205 case JSOP_AND:
206 return "&&";
207 case JSOP_BITOR:
208 return "|";
209 case JSOP_BITXOR:
210 return "^";
211 case JSOP_BITAND:
212 return "&";
213 case JSOP_EQ:
214 return "==";
215 case JSOP_NE:
216 return "!=";
217 case JSOP_STRICTEQ:
218 return "===";
219 case JSOP_STRICTNE:
220 return "!==";
221 case JSOP_LT:
222 return "<";
223 case JSOP_LE:
224 return "<=";
225 case JSOP_GT:
226 return ">";
227 case JSOP_GE:
228 return ">=";
229 case JSOP_LSH:
230 return "<<";
231 case JSOP_RSH:
232 return ">>";
233 case JSOP_URSH:
234 return ">>>";
235 case JSOP_ADD:
236 return "+";
237 case JSOP_SUB:
238 return "-";
239 case JSOP_MUL:
240 return "*";
241 case JSOP_DIV:
242 return "/";
243 case JSOP_MOD:
244 return "%";
245 default:
246 abort();
247 }
248 }
249
250 static void instrument_expression(JSParseNode * node, Stream * f);
251 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
252
253 enum FunctionType {
254 FUNCTION_NORMAL,
255 FUNCTION_GETTER_OR_SETTER
256 };
257
258 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
259 assert(node->pn_type == TOK_FUNCTION);
260 assert(node->pn_arity == PN_FUNC);
261 JSObject * object = node->pn_funpob->object;
262 assert(JS_ObjectIsFunction(context, object));
263 JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
264 assert(function);
265 assert(object == &function->object);
266 Stream_printf(f, "%*s", indent, "");
267 if (type == FUNCTION_NORMAL) {
268 Stream_write_string(f, "function");
269 }
270
271 /* function name */
272 if (function->atom) {
273 Stream_write_char(f, ' ');
274 print_string_atom(function->atom, f);
275 }
276
277 /*
278 function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
279 js_DecompileFunction in jsopcode.cpp
280 */
281 Stream_write_string(f, "(");
282 JSArenaPool pool;
283 JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
284 jsuword * local_names = NULL;
285 if (JS_GET_LOCAL_NAME_COUNT(function)) {
286 local_names = js_GetLocalNameArray(context, function, &pool);
287 if (local_names == NULL) {
288 fatal("out of memory");
289 }
290 }
291 for (int i = 0; i < function->nargs; i++) {
292 if (i > 0) {
293 Stream_write_string(f, ", ");
294 }
295 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
296 print_string_atom(param, f);
297 }
298 JS_FinishArenaPool(&pool);
299 Stream_write_string(f, ") {\n");
300
301 /* function body */
302 instrument_statement(node->pn_body, f, indent + 2, false);
303
304 Stream_write_string(f, "}\n");
305 }
306
307 static void instrument_function_call(JSParseNode * node, Stream * f) {
308 instrument_expression(node->pn_head, f);
309 Stream_write_char(f, '(');
310 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
311 if (p != node->pn_head->pn_next) {
312 Stream_write_string(f, ", ");
313 }
314 instrument_expression(p, f);
315 }
316 Stream_write_char(f, ')');
317 }
318
319 /*
320 See <Expressions> in jsparse.h.
321 TOK_FUNCTION is handled as a statement and as an expression.
322 TOK_DBLDOT is not handled (XML op).
323 TOK_DEFSHARP and TOK_USESHARP are not handled.
324 TOK_ANYNAME is not handled (XML op).
325 TOK_AT is not handled (XML op).
326 TOK_DBLCOLON is not handled.
327 TOK_XML* are not handled.
328 There seem to be some undocumented expressions:
329 TOK_INSTANCEOF binary
330 TOK_IN binary
331 */
332 static void instrument_expression(JSParseNode * node, Stream * f) {
333 switch (node->pn_type) {
334 case TOK_FUNCTION:
335 instrument_function(node, f, 0, FUNCTION_NORMAL);
336 break;
337 case TOK_COMMA:
338 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
339 if (p != node->pn_head) {
340 Stream_write_string(f, ", ");
341 }
342 instrument_expression(p, f);
343 }
344 break;
345 case TOK_ASSIGN:
346 instrument_expression(node->pn_left, f);
347 Stream_write_char(f, ' ');
348 switch (node->pn_op) {
349 case JSOP_ADD:
350 case JSOP_SUB:
351 case JSOP_MUL:
352 case JSOP_MOD:
353 case JSOP_LSH:
354 case JSOP_RSH:
355 case JSOP_URSH:
356 case JSOP_BITAND:
357 case JSOP_BITOR:
358 case JSOP_BITXOR:
359 case JSOP_DIV:
360 Stream_printf(f, "%s", get_op(node->pn_op));
361 break;
362 default:
363 /* do nothing - it must be a simple assignment */
364 break;
365 }
366 Stream_write_string(f, "= ");
367 instrument_expression(node->pn_right, f);
368 break;
369 case TOK_HOOK:
370 instrument_expression(node->pn_kid1, f);
371 Stream_write_string(f, "? ");
372 instrument_expression(node->pn_kid2, f);
373 Stream_write_string(f, ": ");
374 instrument_expression(node->pn_kid3, f);
375 break;
376 case TOK_OR:
377 case TOK_AND:
378 case TOK_BITOR:
379 case TOK_BITXOR:
380 case TOK_BITAND:
381 case TOK_EQOP:
382 case TOK_RELOP:
383 case TOK_SHOP:
384 case TOK_PLUS:
385 case TOK_MINUS:
386 case TOK_STAR:
387 case TOK_DIVOP:
388 switch (node->pn_arity) {
389 case PN_BINARY:
390 instrument_expression(node->pn_left, f);
391 Stream_printf(f, " %s ", get_op(node->pn_op));
392 instrument_expression(node->pn_right, f);
393 break;
394 case PN_LIST:
395 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
396 if (p != node->pn_head) {
397 Stream_printf(f, " %s ", get_op(node->pn_op));
398 }
399 instrument_expression(p, f);
400 }
401 break;
402 default:
403 abort();
404 }
405 break;
406 case TOK_UNARYOP:
407 switch (node->pn_op) {
408 case JSOP_NEG:
409 Stream_write_char(f, '-');
410 instrument_expression(node->pn_kid, f);
411 break;
412 case JSOP_POS:
413 Stream_write_char(f, '+');
414 instrument_expression(node->pn_kid, f);
415 break;
416 case JSOP_NOT:
417 Stream_write_char(f, '!');
418 instrument_expression(node->pn_kid, f);
419 break;
420 case JSOP_BITNOT:
421 Stream_write_char(f, '~');
422 instrument_expression(node->pn_kid, f);
423 break;
424 case JSOP_TYPEOF:
425 Stream_write_string(f, "typeof ");
426 instrument_expression(node->pn_kid, f);
427 break;
428 case JSOP_VOID:
429 Stream_write_string(f, "void ");
430 instrument_expression(node->pn_kid, f);
431 break;
432 default:
433 abort();
434 break;
435 }
436 break;
437 case TOK_INC:
438 case TOK_DEC:
439 /*
440 This is not documented, but node->pn_op tells whether it is pre- or post-increment.
441 */
442 switch (node->pn_op) {
443 case JSOP_INCNAME:
444 case JSOP_INCPROP:
445 case JSOP_INCELEM:
446 Stream_write_string(f, "++");
447 instrument_expression(node->pn_kid, f);
448 break;
449 case JSOP_DECNAME:
450 case JSOP_DECPROP:
451 case JSOP_DECELEM:
452 Stream_write_string(f, "--");
453 instrument_expression(node->pn_kid, f);
454 break;
455 case JSOP_NAMEINC:
456 case JSOP_PROPINC:
457 case JSOP_ELEMINC:
458 instrument_expression(node->pn_kid, f);
459 Stream_write_string(f, "++");
460 break;
461 case JSOP_NAMEDEC:
462 case JSOP_PROPDEC:
463 case JSOP_ELEMDEC:
464 instrument_expression(node->pn_kid, f);
465 Stream_write_string(f, "--");
466 break;
467 default:
468 abort();
469 break;
470 }
471 break;
472 case TOK_NEW:
473 Stream_write_string(f, "new ");
474 instrument_function_call(node, f);
475 break;
476 case TOK_DELETE:
477 Stream_write_string(f, "delete ");
478 instrument_expression(node->pn_kid, f);
479 break;
480 case TOK_DOT:
481 /*
482 This may have originally been x['foo-bar']. Because the string 'foo-bar'
483 contains illegal characters, we have to use the subscript syntax instead of
484 the dot syntax.
485 */
486 instrument_expression(node->pn_expr, f);
487 assert(ATOM_IS_STRING(node->pn_atom));
488 {
489 JSString * s = ATOM_TO_STRING(node->pn_atom);
490 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
491 if (! is_keyword && js_IsIdentifier(s)) {
492 Stream_write_char(f, '.');
493 print_string_atom(node->pn_atom, f);
494 }
495 else {
496 Stream_write_char(f, '[');
497 print_quoted_string_atom(node->pn_atom, f);
498 Stream_write_char(f, ']');
499 }
500 }
501 break;
502 case TOK_LB:
503 instrument_expression(node->pn_left, f);
504 Stream_write_char(f, '[');
505 instrument_expression(node->pn_right, f);
506 Stream_write_char(f, ']');
507 break;
508 case TOK_LP:
509 instrument_function_call(node, f);
510 break;
511 case TOK_RB:
512 Stream_write_char(f, '[');
513 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
514 if (p != node->pn_head) {
515 Stream_write_string(f, ", ");
516 }
517 /* TOK_COMMA is a special case: a hole in the array */
518 if (p->pn_type != TOK_COMMA) {
519 instrument_expression(p, f);
520 }
521 }
522 if (node->pn_extra == PNX_ENDCOMMA) {
523 Stream_write_char(f, ',');
524 }
525 Stream_write_char(f, ']');
526 break;
527 case TOK_RC:
528 Stream_write_char(f, '{');
529 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
530 assert(p->pn_type == TOK_COLON);
531 if (p != node->pn_head) {
532 Stream_write_string(f, ", ");
533 }
534
535 /* check whether this is a getter or setter */
536 switch (p->pn_op) {
537 case JSOP_GETTER:
538 case JSOP_SETTER:
539 if (p->pn_op == JSOP_GETTER) {
540 Stream_write_string(f, "get ");
541 }
542 else {
543 Stream_write_string(f, "set ");
544 }
545 instrument_expression(p->pn_left, f);
546 if (p->pn_right->pn_type != TOK_FUNCTION) {
547 fatal("parse error: expected function");
548 }
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_REGEXP:
572 assert(node->pn_op == JSOP_REGEXP);
573 {
574 JSObject * object = node->pn_pob->object;
575 jsval result;
576 js_regexp_toString(context, object, &result);
577 print_regex(result, f);
578 }
579 break;
580 case TOK_NUMBER:
581 /*
582 A 64-bit IEEE 754 floating point number has a 52-bit fraction.
583 2^(-52) = 2.22 x 10^(-16)
584 Thus there are 16 significant digits.
585 To keep the output simple, special-case zero.
586 */
587 if (node->pn_dval == 0.0) {
588 Stream_write_string(f, "0");
589 }
590 else {
591 Stream_printf(f, "%.15g", node->pn_dval);
592 }
593 break;
594 case TOK_PRIMARY:
595 switch (node->pn_op) {
596 case JSOP_TRUE:
597 Stream_write_string(f, "true");
598 break;
599 case JSOP_FALSE:
600 Stream_write_string(f, "false");
601 break;
602 case JSOP_NULL:
603 Stream_write_string(f, "null");
604 break;
605 case JSOP_THIS:
606 Stream_write_string(f, "this");
607 break;
608 /* jsscan.h mentions `super' ??? */
609 default:
610 abort();
611 }
612 break;
613 case TOK_INSTANCEOF:
614 instrument_expression(node->pn_left, f);
615 Stream_write_string(f, " instanceof ");
616 instrument_expression(node->pn_right, f);
617 break;
618 case TOK_IN:
619 instrument_expression(node->pn_left, f);
620 Stream_write_string(f, " in ");
621 instrument_expression(node->pn_right, f);
622 break;
623 default:
624 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
625 }
626 }
627
628 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
629 assert(node->pn_arity == PN_LIST);
630 Stream_printf(f, "%*s", indent, "");
631 Stream_write_string(f, "var ");
632 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
633 assert(p->pn_type == TOK_NAME);
634 assert(p->pn_arity == PN_NAME);
635 if (p != node->pn_head) {
636 Stream_write_string(f, ", ");
637 }
638 print_string_atom(p->pn_atom, f);
639 if (p->pn_expr != NULL) {
640 Stream_write_string(f, " = ");
641 instrument_expression(p->pn_expr, f);
642 }
643 }
644 }
645
646 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
647 switch (node->pn_type) {
648 case TOK_FUNCTION:
649 instrument_function(node, f, indent, FUNCTION_NORMAL);
650 break;
651 case TOK_LC:
652 assert(node->pn_arity == PN_LIST);
653 /*
654 Stream_write_string(f, "{\n");
655 */
656 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
657 instrument_statement(p, f, indent, false);
658 }
659 /*
660 Stream_printf(f, "%*s", indent, "");
661 Stream_write_string(f, "}\n");
662 */
663 break;
664 case TOK_IF:
665 {
666 assert(node->pn_arity == PN_TERNARY);
667
668 uint16_t line = node->pn_pos.begin.lineno;
669 if (! is_jscoverage_if) {
670 if (line > num_lines) {
671 fatal("%s: script contains more than 65,535 lines", file_id);
672 }
673 if (line >= 2 && exclusive_directives[line - 2]) {
674 is_jscoverage_if = true;
675 }
676 }
677
678 Stream_printf(f, "%*s", indent, "");
679 Stream_write_string(f, "if (");
680 instrument_expression(node->pn_kid1, f);
681 Stream_write_string(f, ") {\n");
682 if (is_jscoverage_if && node->pn_kid3) {
683 uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
684 uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
685 Stream_printf(f, "%*s", indent + 2, "");
686 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
687 }
688 instrument_statement(node->pn_kid2, f, indent + 2, false);
689 Stream_printf(f, "%*s", indent, "");
690 Stream_write_string(f, "}\n");
691
692 if (node->pn_kid3 || is_jscoverage_if) {
693 Stream_printf(f, "%*s", indent, "");
694 Stream_write_string(f, "else {\n");
695
696 if (is_jscoverage_if) {
697 uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
698 uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
699 Stream_printf(f, "%*s", indent + 2, "");
700 Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
701 }
702
703 if (node->pn_kid3) {
704 instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
705 }
706
707 Stream_printf(f, "%*s", indent, "");
708 Stream_write_string(f, "}\n");
709 }
710
711 break;
712 }
713 case TOK_SWITCH:
714 assert(node->pn_arity == PN_BINARY);
715 Stream_printf(f, "%*s", indent, "");
716 Stream_write_string(f, "switch (");
717 instrument_expression(node->pn_left, f);
718 Stream_write_string(f, ") {\n");
719 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
720 Stream_printf(f, "%*s", indent, "");
721 switch (p->pn_type) {
722 case TOK_CASE:
723 Stream_write_string(f, "case ");
724 instrument_expression(p->pn_left, f);
725 Stream_write_string(f, ":\n");
726 break;
727 case TOK_DEFAULT:
728 Stream_write_string(f, "default:\n");
729 break;
730 default:
731 abort();
732 break;
733 }
734 instrument_statement(p->pn_right, f, indent + 2, false);
735 }
736 Stream_printf(f, "%*s", indent, "");
737 Stream_write_string(f, "}\n");
738 break;
739 case TOK_CASE:
740 case TOK_DEFAULT:
741 abort();
742 break;
743 case TOK_WHILE:
744 assert(node->pn_arity == PN_BINARY);
745 Stream_printf(f, "%*s", indent, "");
746 Stream_write_string(f, "while (");
747 instrument_expression(node->pn_left, f);
748 Stream_write_string(f, ") {\n");
749 instrument_statement(node->pn_right, f, indent + 2, false);
750 Stream_write_string(f, "}\n");
751 break;
752 case TOK_DO:
753 assert(node->pn_arity == PN_BINARY);
754 Stream_printf(f, "%*s", indent, "");
755 Stream_write_string(f, "do {\n");
756 instrument_statement(node->pn_left, f, indent + 2, false);
757 Stream_write_string(f, "}\n");
758 Stream_printf(f, "%*s", indent, "");
759 Stream_write_string(f, "while (");
760 instrument_expression(node->pn_right, f);
761 Stream_write_string(f, ");\n");
762 break;
763 case TOK_FOR:
764 assert(node->pn_arity == PN_BINARY);
765 Stream_printf(f, "%*s", indent, "");
766 Stream_write_string(f, "for (");
767 switch (node->pn_left->pn_type) {
768 case TOK_IN:
769 /* for/in */
770 assert(node->pn_left->pn_arity == PN_BINARY);
771 switch (node->pn_left->pn_left->pn_type) {
772 case TOK_VAR:
773 instrument_var_statement(node->pn_left->pn_left, f, 0);
774 break;
775 case TOK_NAME:
776 instrument_expression(node->pn_left->pn_left, f);
777 break;
778 default:
779 /* this is undocumented: for (x.value in y) */
780 instrument_expression(node->pn_left->pn_left, f);
781 break;
782 /*
783 default:
784 fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
785 abort();
786 break;
787 */
788 }
789 Stream_write_string(f, " in ");
790 instrument_expression(node->pn_left->pn_right, f);
791 break;
792 case TOK_RESERVED:
793 /* for (;;) */
794 assert(node->pn_left->pn_arity == PN_TERNARY);
795 if (node->pn_left->pn_kid1) {
796 if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {
797 instrument_var_statement(node->pn_left->pn_kid1, f, 0);
798 }
799 else {
800 instrument_expression(node->pn_left->pn_kid1, f);
801 }
802 }
803 Stream_write_string(f, ";");
804 if (node->pn_left->pn_kid2) {
805 Stream_write_char(f, ' ');
806 instrument_expression(node->pn_left->pn_kid2, f);
807 }
808 Stream_write_string(f, ";");
809 if (node->pn_left->pn_kid3) {
810 Stream_write_char(f, ' ');
811 instrument_expression(node->pn_left->pn_kid3, f);
812 }
813 break;
814 default:
815 abort();
816 break;
817 }
818 Stream_write_string(f, ") {\n");
819 instrument_statement(node->pn_right, f, indent + 2, false);
820 Stream_write_string(f, "}\n");
821 break;
822 case TOK_THROW:
823 assert(node->pn_arity == PN_UNARY);
824 Stream_printf(f, "%*s", indent, "");
825 Stream_write_string(f, "throw ");
826 instrument_expression(node->pn_u.unary.kid, f);
827 Stream_write_string(f, ";\n");
828 break;
829 case TOK_TRY:
830 Stream_printf(f, "%*s", indent, "");
831 Stream_write_string(f, "try {\n");
832 instrument_statement(node->pn_kid1, f, indent + 2, false);
833 Stream_printf(f, "%*s", indent, "");
834 Stream_write_string(f, "}\n");
835 if (node->pn_kid2) {
836 assert(node->pn_kid2->pn_type == TOK_RESERVED);
837 for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
838 assert(scope->pn_type == TOK_LEXICALSCOPE);
839 JSParseNode * catch = scope->pn_expr;
840 assert(catch->pn_type == TOK_CATCH);
841 Stream_printf(f, "%*s", indent, "");
842 Stream_write_string(f, "catch (");
843 assert(catch->pn_kid1->pn_arity == PN_NAME);
844 print_string_atom(catch->pn_kid1->pn_atom, f);
845 if (catch->pn_kid2) {
846 Stream_write_string(f, " if ");
847 instrument_expression(catch->pn_kid2, f);
848 }
849 Stream_write_string(f, ") {\n");
850 instrument_statement(catch->pn_kid3, f, indent + 2, false);
851 Stream_printf(f, "%*s", indent, "");
852 Stream_write_string(f, "}\n");
853 }
854 }
855 if (node->pn_kid3) {
856 Stream_printf(f, "%*s", indent, "");
857 Stream_write_string(f, "finally {\n");
858 instrument_statement(node->pn_kid3, f, indent + 2, false);
859 Stream_printf(f, "%*s", indent, "");
860 Stream_write_string(f, "}\n");
861 }
862 break;
863 case TOK_CATCH:
864 abort();
865 break;
866 case TOK_BREAK:
867 case TOK_CONTINUE:
868 assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
869 Stream_printf(f, "%*s", indent, "");
870 Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
871 JSAtom * atom = node->pn_u.name.atom;
872 if (atom != NULL) {
873 Stream_write_char(f, ' ');
874 print_string_atom(node->pn_atom, f);
875 }
876 Stream_write_string(f, ";\n");
877 break;
878 case TOK_WITH:
879 assert(node->pn_arity == PN_BINARY);
880 Stream_printf(f, "%*s", indent, "");
881 Stream_write_string(f, "with (");
882 instrument_expression(node->pn_left, f);
883 Stream_write_string(f, ") {\n");
884 instrument_statement(node->pn_right, f, indent + 2, false);
885 Stream_printf(f, "%*s", indent, "");
886 Stream_write_string(f, "}\n");
887 break;
888 case TOK_VAR:
889 instrument_var_statement(node, f, indent);
890 Stream_write_string(f, ";\n");
891 break;
892 case TOK_RETURN:
893 assert(node->pn_arity == PN_UNARY);
894 Stream_printf(f, "%*s", indent, "");
895 Stream_write_string(f, "return");
896 if (node->pn_kid != NULL) {
897 Stream_write_char(f, ' ');
898 instrument_expression(node->pn_kid, f);
899 }
900 Stream_write_string(f, ";\n");
901 break;
902 case TOK_SEMI:
903 assert(node->pn_arity == PN_UNARY);
904 Stream_printf(f, "%*s", indent, "");
905 if (node->pn_kid != NULL) {
906 instrument_expression(node->pn_kid, f);
907 }
908 Stream_write_string(f, ";\n");
909 break;
910 case TOK_COLON:
911 assert(node->pn_arity == PN_NAME);
912 /*
913 This one is tricky: can't output instrumentation between the label and the
914 statement it's supposed to label ...
915 */
916 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
917 print_string_atom(node->pn_atom, f);
918 Stream_write_string(f, ":\n");
919 /*
920 ... use output_statement instead of instrument_statement.
921 */
922 output_statement(node->pn_expr, f, indent, false);
923 break;
924 default:
925 fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
926 }
927 }
928
929 /*
930 See <Statements> in jsparse.h.
931 TOK_FUNCTION is handled as a statement and as an expression.
932 TOK_EXPORT, TOK_IMPORT are not handled.
933 */
934 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
935 if (node->pn_type != TOK_LC) {
936 uint16_t line = node->pn_pos.begin.lineno;
937 if (line > num_lines) {
938 fatal("%s: script contains more than 65,535 lines", file_id);
939 }
940
941 /* the root node has line number 0 */
942 if (line != 0) {
943 Stream_printf(f, "%*s", indent, "");
944 Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
945 lines[line - 1] = 1;
946 }
947 }
948 output_statement(node, f, indent, is_jscoverage_if);
949 }
950
951 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
952 const jschar * characters_end = characters + line_end;
953 const jschar * cp = characters + line_start;
954 const char * bp = prefix;
955 for (;;) {
956 if (*bp == '\0') {
957 return true;
958 }
959 else if (cp == characters_end) {
960 return false;
961 }
962 else if (*cp != *bp) {
963 return false;
964 }
965 bp++;
966 cp++;
967 }
968 }
969
970 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
971 /* XXX - other Unicode space */
972 const jschar * end = characters + line_end;
973 for (const jschar * p = characters + line_start; p < end; p++) {
974 jschar c = *p;
975 if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
976 continue;
977 }
978 else {
979 return false;
980 }
981 }
982 return true;
983 }
984
985 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
986 fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
987 }
988
989 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
990 file_id = id;
991
992 /* parse the javascript */
993 JSParseContext parse_context;
994 if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
995 fatal("cannot create token stream from file: %s", file_id);
996 }
997 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
998 JSParseNode * node = js_ParseScript(context, global, &parse_context);
999 if (node == NULL) {
1000 js_ReportUncaughtException(context);
1001 fatal("parse error in file: %s", file_id);
1002 }
1003 JS_SetErrorReporter(context, old_error_reporter);
1004 num_lines = node->pn_pos.end.lineno;
1005 lines = xmalloc(num_lines);
1006 for (unsigned int i = 0; i < num_lines; i++) {
1007 lines[i] = 0;
1008 }
1009
1010 /* search code for conditionals */
1011 exclusive_directives = xnew(bool, num_lines);
1012 for (unsigned int i = 0; i < num_lines; i++) {
1013 exclusive_directives[i] = false;
1014 }
1015
1016 bool has_conditionals = false;
1017 struct IfDirective * if_directives = NULL;
1018 size_t line_number = 0;
1019 size_t i = 0;
1020 while (i < num_characters) {
1021 if (line_number == UINT16_MAX) {
1022 fatal("%s: script has more than 65,535 lines", file_id);
1023 }
1024 line_number++;
1025 size_t line_start = i;
1026 jschar c;
1027 bool done = false;
1028 while (! done && i < num_characters) {
1029 c = characters[i];
1030 switch (c) {
1031 case '\r':
1032 case '\n':
1033 case 0x2028:
1034 case 0x2029:
1035 done = true;
1036 break;
1037 default:
1038 i++;
1039 }
1040 }
1041 size_t line_end = i;
1042 if (i < num_characters) {
1043 i++;
1044 if (c == '\r' && i < num_characters && characters[i] == '\n') {
1045 i++;
1046 }
1047 }
1048
1049 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1050 has_conditionals = true;
1051
1052 if (characters_are_white_space(characters, line_start + 16, line_end)) {
1053 exclusive_directives[line_number - 1] = true;
1054 }
1055 else {
1056 struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1057 if_directive->condition_start = characters + line_start + 16;
1058 if_directive->condition_end = characters + line_end;
1059 if_directive->start_line = line_number;
1060 if_directive->end_line = 0;
1061 if_directive->next = if_directives;
1062 if_directives = if_directive;
1063 }
1064 }
1065 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1066 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1067 if (p->end_line == 0) {
1068 p->end_line = line_number;
1069 break;
1070 }
1071 }
1072 }
1073 }
1074
1075 /*
1076 An instrumented JavaScript file has 4 sections:
1077 1. initialization
1078 2. instrumented source code
1079 3. conditionals
1080 4. original source code
1081 */
1082
1083 Stream * instrumented = Stream_new(0);
1084 instrument_statement(node, instrumented, 0, false);
1085 js_FinishParseContext(context, &parse_context);
1086
1087 /* write line number info to the output */
1088 Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1089 Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1090 Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1091 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1092 Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1093 for (int i = 0; i < num_lines; i++) {
1094 if (lines[i]) {
1095 Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1096 }
1097 }
1098 Stream_write_string(output, "}\n");
1099 free(lines);
1100 lines = NULL;
1101 free(exclusive_directives);
1102 exclusive_directives = NULL;
1103
1104 /* conditionals */
1105 if (has_conditionals) {
1106 Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1107 }
1108
1109 /* copy the instrumented source code to the output */
1110 Stream_write(output, instrumented->data, instrumented->length);
1111
1112 /* conditionals */
1113 for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1114 Stream_write_string(output, "if (!(");
1115 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1116 Stream_write_string(output, ")) {\n");
1117 Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1118 Stream_write_string(output, "}\n");
1119 }
1120
1121 /* free */
1122 while (if_directives != NULL) {
1123 struct IfDirective * if_directive = if_directives;
1124 if_directives = if_directives->next;
1125 free(if_directive);
1126 }
1127
1128 /* copy the original source to the output */
1129 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1130 jscoverage_write_source(id, characters, num_characters, output);
1131 Stream_printf(output, ";\n");
1132
1133 Stream_delete(instrumented);
1134
1135 file_id = NULL;
1136 }
1137
1138 void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1139 Stream_write_string(output, "[");
1140 if (jscoverage_highlight) {
1141 Stream * highlighted_stream = Stream_new(num_characters);
1142 jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1143 size_t i = 0;
1144 while (i < highlighted_stream->length) {
1145 if (i > 0) {
1146 Stream_write_char(output, ',');
1147 }
1148
1149 Stream_write_char(output, '"');
1150 bool done = false;
1151 while (! done) {
1152 char c = highlighted_stream->data[i];
1153 switch (c) {
1154 case 0x8:
1155 /* backspace */
1156 Stream_write_string(output, "\\b");
1157 break;
1158 case 0x9:
1159 /* horizontal tab */
1160 Stream_write_string(output, "\\t");
1161 break;
1162 case 0xa:
1163 /* line feed (new line) */
1164 done = true;
1165 break;
1166 /* IE doesn't support this */
1167 /*
1168 case 0xb:
1169 Stream_write_string(output, "\\v");
1170 break;
1171 */
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 /* IE doesn't support this */
1227 /*
1228 case 0xb:
1229 Stream_write_string(output, "\\v");
1230 break;
1231 */
1232 case 0xc:
1233 /* form feed */
1234 Stream_write_string(output, "\\f");
1235 break;
1236 case 0xd:
1237 /* carriage return */
1238 done = true;
1239 if (i + 1 < num_characters && characters[i + 1] == '\n') {
1240 i++;
1241 }
1242 break;
1243 case '"':
1244 Stream_write_string(output, "\\\"");
1245 break;
1246 case '\\':
1247 Stream_write_string(output, "\\\\");
1248 break;
1249 case '&':
1250 Stream_write_string(output, "&amp;");
1251 break;
1252 case '<':
1253 Stream_write_string(output, "&lt;");
1254 break;
1255 case '>':
1256 Stream_write_string(output, "&gt;");
1257 break;
1258 case 0x2028:
1259 case 0x2029:
1260 done = true;
1261 break;
1262 default:
1263 if (32 <= c && c <= 126) {
1264 Stream_write_char(output, c);
1265 }
1266 else {
1267 Stream_printf(output, "&#%d;", c);
1268 }
1269 break;
1270 }
1271 i++;
1272 if (i >= num_characters) {
1273 done = true;
1274 }
1275 }
1276 Stream_write_char(output, '"');
1277 }
1278 }
1279 Stream_write_string(output, "]");
1280 }
1281
1282 void jscoverage_copy_resources(const char * destination_directory) {
1283 copy_resource("jscoverage.html", destination_directory);
1284 copy_resource("jscoverage.css", destination_directory);
1285 copy_resource("jscoverage.js", destination_directory);
1286 copy_resource("jscoverage-ie.css", destination_directory);
1287 copy_resource("jscoverage-throbber.gif", destination_directory);
1288 copy_resource("jscoverage-highlight.css", destination_directory);
1289 }
1290
1291 /*
1292 coverage reports
1293 */
1294
1295 struct FileCoverageList {
1296 FileCoverage * file_coverage;
1297 struct FileCoverageList * next;
1298 };
1299
1300 struct Coverage {
1301 JSHashTable * coverage_table;
1302 struct FileCoverageList * coverage_list;
1303 };
1304
1305 static int compare_strings(const void * p1, const void * p2) {
1306 return strcmp(p1, p2) == 0;
1307 }
1308
1309 Coverage * Coverage_new(void) {
1310 Coverage * result = xmalloc(sizeof(Coverage));
1311 result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1312 if (result->coverage_table == NULL) {
1313 fatal("cannot create hash table");
1314 }
1315 result->coverage_list = NULL;
1316 return result;
1317 }
1318
1319 void Coverage_delete(Coverage * coverage) {
1320 JS_HashTableDestroy(coverage->coverage_table);
1321 struct FileCoverageList * p = coverage->coverage_list;
1322 while (p != NULL) {
1323 free(p->file_coverage->coverage_lines);
1324 if (p->file_coverage->source_lines != NULL) {
1325 for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1326 free(p->file_coverage->source_lines[i]);
1327 }
1328 free(p->file_coverage->source_lines);
1329 }
1330 free(p->file_coverage->id);
1331 free(p->file_coverage);
1332 struct FileCoverageList * q = p;
1333 p = p->next;
1334 free(q);
1335 }
1336 free(coverage);
1337 }
1338
1339 struct EnumeratorArg {
1340 CoverageForeachFunction f;
1341 void * p;
1342 };
1343
1344 static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1345 struct EnumeratorArg * enumerator_arg = arg;
1346 enumerator_arg->f(entry->value, i, enumerator_arg->p);
1347 return 0;
1348 }
1349
1350 void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1351 struct EnumeratorArg enumerator_arg;
1352 enumerator_arg.f = f;
1353 enumerator_arg.p = p;
1354 JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1355 }
1356
1357 int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1358 int result = 0;
1359
1360 jschar * base = js_InflateString(context, (char *) json, &length);
1361 if (base == NULL) {
1362 fatal("out of memory");
1363 }
1364
1365 jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1366 parenthesized_json[0] = '(';
1367 memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1368 parenthesized_json[length + 1] = ')';
1369
1370 JS_free(context, base);
1371
1372 JSParseContext parse_context;
1373 if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1374 free(parenthesized_json);
1375 return -1;
1376 }
1377 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1378 free(parenthesized_json);
1379 if (root == NULL) {
1380 result = -1;
1381 goto done;
1382 }
1383
1384 /* root node must be TOK_LC */
1385 if (root->pn_type != TOK_LC) {
1386 result = -1;
1387 goto done;
1388 }
1389 JSParseNode * semi = root->pn_u.list.head;
1390
1391 /* the list must be TOK_SEMI and it must contain only one element */
1392 if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1393 result = -1;
1394 goto done;
1395 }
1396 JSParseNode * parenthesized = semi->pn_kid;
1397
1398 /* this must be a parenthesized expression */
1399 if (parenthesized->pn_type != TOK_RP) {
1400 result = -1;
1401 goto done;
1402 }
1403 JSParseNode * object = parenthesized->pn_kid;
1404
1405 /* this must be an object literal */
1406 if (object->pn_type != TOK_RC) {
1407 result = -1;
1408 goto done;
1409 }
1410
1411 for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1412 /* every element of this list must be TOK_COLON */
1413 if (p->pn_type != TOK_COLON) {
1414 result = -1;
1415 goto done;
1416 }
1417
1418 /* the key must be a string representing the file */
1419 JSParseNode * key = p->pn_left;
1420 if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1421 result = -1;
1422 goto done;
1423 }
1424 char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1425
1426 /* the value must be an object literal OR an array */
1427 JSParseNode * value = p->pn_right;
1428 if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1429 result = -1;
1430 goto done;
1431 }
1432
1433 JSParseNode * array = NULL;
1434 JSParseNode * source = NULL;
1435 if (value->pn_type == TOK_RB) {
1436 /* an array */
1437 array = value;
1438 }
1439 else if (value->pn_type == TOK_RC) {
1440 /* an object literal */
1441 if (value->pn_count != 2) {
1442 result = -1;
1443 goto done;
1444 }
1445 for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1446 if (element->pn_type != TOK_COLON) {
1447 result = -1;
1448 goto done;
1449 }
1450 JSParseNode * left = element->pn_left;
1451 if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1452 result = -1;
1453 goto done;
1454 }
1455 const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1456 if (strcmp(s, "coverage") == 0) {
1457 array = element->pn_right;
1458 if (array->pn_type != TOK_RB) {
1459 result = -1;
1460 goto done;
1461 }
1462 }
1463 else if (strcmp(s, "source") == 0) {
1464 source = element->pn_right;
1465 if (source->pn_type != TOK_RB) {
1466 result = -1;
1467 goto done;
1468 }
1469 }
1470 else {
1471 result = -1;
1472 goto done;
1473 }
1474 }
1475 }
1476 else {
1477 result = -1;
1478 goto done;
1479 }
1480
1481 if (array == NULL) {
1482 result = -1;
1483 goto done;
1484 }
1485
1486 /* look up the file in the coverage table */
1487 FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1488 if (file_coverage == NULL) {
1489 /* not there: create a new one */
1490 char * id = xstrdup(id_bytes);
1491 file_coverage = xmalloc(sizeof(FileCoverage));
1492 file_coverage->id = id;
1493 file_coverage->num_coverage_lines = array->pn_count;
1494 file_coverage->coverage_lines = xnew(int, array->pn_count);
1495 file_coverage->source_lines = NULL;
1496
1497 /* set coverage for all lines */
1498 uint32 i = 0;
1499 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1500 if (element->pn_type == TOK_NUMBER) {
1501 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1502 }
1503 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1504 file_coverage->coverage_lines[i] = -1;
1505 }
1506 else {
1507 result = -1;
1508 goto done;
1509 }
1510 }
1511 assert(i == array->pn_count);
1512
1513 /* add to the hash table */
1514 JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1515 struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1516 coverage_list->file_coverage = file_coverage;
1517 coverage_list->next = coverage->coverage_list;
1518 coverage->coverage_list = coverage_list;
1519 }
1520 else {
1521 /* sanity check */
1522 assert(strcmp(file_coverage->id, id_bytes) == 0);
1523 if (file_coverage->num_coverage_lines != array->pn_count) {
1524 result = -2;
1525 goto done;
1526 }
1527
1528 /* merge the coverage */
1529 uint32 i = 0;
1530 for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1531 if (element->pn_type == TOK_NUMBER) {
1532 if (file_coverage->coverage_lines[i] == -1) {
1533 result = -2;
1534 goto done;
1535 }
1536 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1537 }
1538 else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1539 if (file_coverage->coverage_lines[i] != -1) {
1540 result = -2;
1541 goto done;
1542 }
1543 }
1544 else {
1545 result = -1;
1546 goto done;
1547 }
1548 }
1549 assert(i == array->pn_count);
1550 }
1551
1552 /* if this JSON file has source, use it */
1553 if (file_coverage->source_lines == NULL && source != NULL) {
1554 file_coverage->num_source_lines = source->pn_count;
1555 file_coverage->source_lines = xnew(char *, source->pn_count);
1556 uint32 i = 0;
1557 for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1558 if (element->pn_type != TOK_STRING) {
1559 result = -1;
1560 goto done;
1561 }
1562 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1563 }
1564 assert(i == source->pn_count);
1565 }
1566 }
1567
1568 done:
1569 js_FinishParseContext(context, &parse_context);
1570 return result;
1571 }

  ViewVC Help
Powered by ViewVC 1.1.24