/[jscoverage]/trunk/instrument-js.c
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Revision 339 - (hide annotations)
Fri Oct 24 16:13:57 2008 UTC (10 years, 6 months ago) by siliconforks
File MIME type: text/plain
File size: 45455 byte(s)
Add support for the JS 1.6 `for each' statement.
1 siliconforks 2 /*
2     instrument-js.c - JavaScript instrumentation routines
3 siliconforks 87 Copyright (C) 2007, 2008 siliconforks.com
4 siliconforks 2
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 siliconforks 116 #include <config.h>
21    
22 siliconforks 2 #include "instrument-js.h"
23    
24     #include <assert.h>
25     #include <stdlib.h>
26     #include <string.h>
27    
28     #include <jsapi.h>
29 siliconforks 336 #include <jsarena.h>
30 siliconforks 2 #include <jsatom.h>
31 siliconforks 284 #include <jsexn.h>
32 siliconforks 2 #include <jsfun.h>
33     #include <jsinterp.h>
34 siliconforks 339 #include <jsiter.h>
35 siliconforks 2 #include <jsparse.h>
36     #include <jsregexp.h>
37     #include <jsscope.h>
38     #include <jsstr.h>
39    
40 siliconforks 174 #include "encoding.h"
41 siliconforks 179 #include "global.h"
42     #include "highlight.h"
43 siliconforks 116 #include "resource-manager.h"
44 siliconforks 2 #include "util.h"
45    
46 siliconforks 240 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 siliconforks 2 static JSRuntime * runtime = NULL;
57     static JSContext * context = NULL;
58     static JSObject * global = NULL;
59 siliconforks 339 static JSVersion js_version = JSVERSION_ECMA_3;
60 siliconforks 2
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 siliconforks 214 static uint16_t num_lines = 0;
68 siliconforks 2
69 siliconforks 339 void jscoverage_set_js_version(const char * version) {
70     js_version = atoi(version);
71     }
72    
73 siliconforks 2 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 siliconforks 339 JS_SetVersion(context, js_version);
85    
86 siliconforks 2 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 siliconforks 246 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 siliconforks 92 static void print_string(JSString * s, Stream * f) {
126 siliconforks 174 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 siliconforks 317 /* IE doesn't support this */
160     /*
161 siliconforks 174 case 0xb:
162     Stream_write_string(f, "\\v");
163     break;
164 siliconforks 317 */
165 siliconforks 174 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 siliconforks 2 }
177     }
178    
179 siliconforks 92 static void print_string_atom(JSAtom * atom, Stream * f) {
180 siliconforks 2 assert(ATOM_IS_STRING(atom));
181     JSString * s = ATOM_TO_STRING(atom);
182     print_string(s, f);
183     }
184    
185 siliconforks 174 static void print_regex(jsval value, Stream * f) {
186 siliconforks 2 assert(JSVAL_IS_STRING(value));
187     JSString * s = JSVAL_TO_STRING(value);
188 siliconforks 174 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 siliconforks 2 }
200    
201 siliconforks 92 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
202 siliconforks 2 assert(ATOM_IS_STRING(atom));
203     JSString * s = ATOM_TO_STRING(atom);
204 siliconforks 174 Stream_write_char(f, '"');
205     print_string(s, f);
206     Stream_write_char(f, '"');
207 siliconforks 2 }
208    
209     static const char * get_op(uint8 op) {
210     switch(op) {
211 siliconforks 336 case JSOP_OR:
212     return "||";
213     case JSOP_AND:
214     return "&&";
215 siliconforks 2 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 siliconforks 336 case JSOP_STRICTEQ:
226 siliconforks 2 return "===";
227 siliconforks 336 case JSOP_STRICTNE:
228 siliconforks 2 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 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f);
259 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
260 siliconforks 2
261 siliconforks 155 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 siliconforks 336 assert(node->pn_type == TOK_FUNCTION);
268 siliconforks 156 assert(node->pn_arity == PN_FUNC);
269 siliconforks 336 JSObject * object = node->pn_funpob->object;
270 siliconforks 156 assert(JS_ObjectIsFunction(context, object));
271     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
272     assert(function);
273 siliconforks 336 assert(object == &function->object);
274 siliconforks 156 Stream_printf(f, "%*s", indent, "");
275     if (type == FUNCTION_NORMAL) {
276     Stream_write_string(f, "function");
277     }
278 siliconforks 2
279 siliconforks 156 /* function name */
280     if (function->atom) {
281     Stream_write_char(f, ' ');
282     print_string_atom(function->atom, f);
283     }
284 siliconforks 2
285 siliconforks 336 /*
286     function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
287     js_DecompileFunction in jsopcode.cpp
288     */
289 siliconforks 156 Stream_write_string(f, "(");
290 siliconforks 336 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 siliconforks 2 }
298 siliconforks 156 }
299     for (int i = 0; i < function->nargs; i++) {
300     if (i > 0) {
301     Stream_write_string(f, ", ");
302 siliconforks 2 }
303 siliconforks 336 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
304     print_string_atom(param, f);
305 siliconforks 156 }
306 siliconforks 336 JS_FinishArenaPool(&pool);
307 siliconforks 156 Stream_write_string(f, ") {\n");
308 siliconforks 2
309 siliconforks 156 /* function body */
310 siliconforks 240 instrument_statement(node->pn_body, f, indent + 2, false);
311 siliconforks 2
312 siliconforks 156 Stream_write_string(f, "}\n");
313 siliconforks 2 }
314    
315 siliconforks 92 static void instrument_function_call(JSParseNode * node, Stream * f) {
316 siliconforks 2 instrument_expression(node->pn_head, f);
317 siliconforks 92 Stream_write_char(f, '(');
318 siliconforks 2 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
319     if (p != node->pn_head->pn_next) {
320 siliconforks 92 Stream_write_string(f, ", ");
321 siliconforks 2 }
322     instrument_expression(p, f);
323     }
324 siliconforks 92 Stream_write_char(f, ')');
325 siliconforks 2 }
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 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
341 siliconforks 2 switch (node->pn_type) {
342     case TOK_FUNCTION:
343 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
344 siliconforks 2 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 siliconforks 92 Stream_write_string(f, ", ");
349 siliconforks 2 }
350     instrument_expression(p, f);
351     }
352     break;
353     case TOK_ASSIGN:
354     instrument_expression(node->pn_left, f);
355 siliconforks 92 Stream_write_char(f, ' ');
356 siliconforks 2 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 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
369 siliconforks 2 break;
370     default:
371     /* do nothing - it must be a simple assignment */
372     break;
373     }
374 siliconforks 92 Stream_write_string(f, "= ");
375 siliconforks 2 instrument_expression(node->pn_right, f);
376     break;
377     case TOK_HOOK:
378     instrument_expression(node->pn_kid1, f);
379 siliconforks 92 Stream_write_string(f, "? ");
380 siliconforks 2 instrument_expression(node->pn_kid2, f);
381 siliconforks 92 Stream_write_string(f, ": ");
382 siliconforks 2 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 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
400 siliconforks 2 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 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
406 siliconforks 2 }
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 siliconforks 92 Stream_write_char(f, '-');
418 siliconforks 2 instrument_expression(node->pn_kid, f);
419     break;
420     case JSOP_POS:
421 siliconforks 92 Stream_write_char(f, '+');
422 siliconforks 2 instrument_expression(node->pn_kid, f);
423     break;
424     case JSOP_NOT:
425 siliconforks 92 Stream_write_char(f, '!');
426 siliconforks 2 instrument_expression(node->pn_kid, f);
427     break;
428     case JSOP_BITNOT:
429 siliconforks 92 Stream_write_char(f, '~');
430 siliconforks 2 instrument_expression(node->pn_kid, f);
431     break;
432     case JSOP_TYPEOF:
433 siliconforks 92 Stream_write_string(f, "typeof ");
434 siliconforks 2 instrument_expression(node->pn_kid, f);
435     break;
436     case JSOP_VOID:
437 siliconforks 92 Stream_write_string(f, "void ");
438 siliconforks 2 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 siliconforks 92 Stream_write_string(f, "++");
455 siliconforks 2 instrument_expression(node->pn_kid, f);
456     break;
457     case JSOP_DECNAME:
458     case JSOP_DECPROP:
459     case JSOP_DECELEM:
460 siliconforks 92 Stream_write_string(f, "--");
461 siliconforks 2 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 siliconforks 92 Stream_write_string(f, "++");
468 siliconforks 2 break;
469     case JSOP_NAMEDEC:
470     case JSOP_PROPDEC:
471     case JSOP_ELEMDEC:
472     instrument_expression(node->pn_kid, f);
473 siliconforks 92 Stream_write_string(f, "--");
474 siliconforks 2 break;
475     default:
476     abort();
477     break;
478     }
479     break;
480     case TOK_NEW:
481 siliconforks 92 Stream_write_string(f, "new ");
482 siliconforks 2 instrument_function_call(node, f);
483     break;
484     case TOK_DELETE:
485 siliconforks 92 Stream_write_string(f, "delete ");
486 siliconforks 2 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 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
496     {
497     JSString * s = ATOM_TO_STRING(node->pn_atom);
498 siliconforks 336 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
499     if (! is_keyword && js_IsIdentifier(s)) {
500 siliconforks 92 Stream_write_char(f, '.');
501 siliconforks 84 print_string_atom(node->pn_atom, f);
502     }
503     else {
504 siliconforks 92 Stream_write_char(f, '[');
505 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
506 siliconforks 92 Stream_write_char(f, ']');
507 siliconforks 84 }
508     }
509 siliconforks 2 break;
510     case TOK_LB:
511     instrument_expression(node->pn_left, f);
512 siliconforks 92 Stream_write_char(f, '[');
513 siliconforks 2 instrument_expression(node->pn_right, f);
514 siliconforks 92 Stream_write_char(f, ']');
515 siliconforks 2 break;
516     case TOK_LP:
517     instrument_function_call(node, f);
518     break;
519     case TOK_RB:
520 siliconforks 92 Stream_write_char(f, '[');
521 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
522     if (p != node->pn_head) {
523 siliconforks 92 Stream_write_string(f, ", ");
524 siliconforks 2 }
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 siliconforks 92 Stream_write_char(f, ',');
532 siliconforks 2 }
533 siliconforks 92 Stream_write_char(f, ']');
534 siliconforks 2 break;
535     case TOK_RC:
536 siliconforks 92 Stream_write_char(f, '{');
537 siliconforks 2 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 siliconforks 92 Stream_write_string(f, ", ");
541 siliconforks 2 }
542 siliconforks 155
543     /* check whether this is a getter or setter */
544     switch (p->pn_op) {
545     case JSOP_GETTER:
546     case JSOP_SETTER:
547 siliconforks 293 if (p->pn_op == JSOP_GETTER) {
548     Stream_write_string(f, "get ");
549     }
550     else {
551     Stream_write_string(f, "set ");
552     }
553 siliconforks 155 instrument_expression(p->pn_left, f);
554 siliconforks 293 if (p->pn_right->pn_type != TOK_FUNCTION) {
555     fatal("parse error: expected function");
556     }
557 siliconforks 155 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 siliconforks 2 }
566 siliconforks 92 Stream_write_char(f, '}');
567 siliconforks 2 break;
568     case TOK_RP:
569 siliconforks 92 Stream_write_char(f, '(');
570 siliconforks 2 instrument_expression(node->pn_kid, f);
571 siliconforks 92 Stream_write_char(f, ')');
572 siliconforks 2 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 siliconforks 336 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 siliconforks 2 }
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 siliconforks 92 Stream_write_string(f, "0");
597 siliconforks 2 }
598     else {
599 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
600 siliconforks 2 }
601     break;
602     case TOK_PRIMARY:
603     switch (node->pn_op) {
604     case JSOP_TRUE:
605 siliconforks 92 Stream_write_string(f, "true");
606 siliconforks 2 break;
607     case JSOP_FALSE:
608 siliconforks 92 Stream_write_string(f, "false");
609 siliconforks 2 break;
610     case JSOP_NULL:
611 siliconforks 92 Stream_write_string(f, "null");
612 siliconforks 2 break;
613     case JSOP_THIS:
614 siliconforks 92 Stream_write_string(f, "this");
615 siliconforks 2 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 siliconforks 92 Stream_write_string(f, " instanceof ");
624 siliconforks 2 instrument_expression(node->pn_right, f);
625     break;
626     case TOK_IN:
627     instrument_expression(node->pn_left, f);
628 siliconforks 92 Stream_write_string(f, " in ");
629 siliconforks 2 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 siliconforks 92 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
637 siliconforks 2 assert(node->pn_arity == PN_LIST);
638 siliconforks 92 Stream_printf(f, "%*s", indent, "");
639     Stream_write_string(f, "var ");
640 siliconforks 2 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 siliconforks 92 Stream_write_string(f, ", ");
645 siliconforks 2 }
646     print_string_atom(p->pn_atom, f);
647     if (p->pn_expr != NULL) {
648 siliconforks 92 Stream_write_string(f, " = ");
649 siliconforks 2 instrument_expression(p->pn_expr, f);
650     }
651     }
652     }
653    
654 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
655 siliconforks 2 switch (node->pn_type) {
656     case TOK_FUNCTION:
657 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
658 siliconforks 2 break;
659     case TOK_LC:
660     assert(node->pn_arity == PN_LIST);
661     /*
662 siliconforks 92 Stream_write_string(f, "{\n");
663 siliconforks 2 */
664     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
665 siliconforks 240 instrument_statement(p, f, indent, false);
666 siliconforks 2 }
667     /*
668 siliconforks 92 Stream_printf(f, "%*s", indent, "");
669     Stream_write_string(f, "}\n");
670 siliconforks 2 */
671     break;
672     case TOK_IF:
673 siliconforks 240 {
674 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
675 siliconforks 240
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 siliconforks 92 Stream_printf(f, "%*s", indent, "");
687     Stream_write_string(f, "if (");
688 siliconforks 2 instrument_expression(node->pn_kid1, f);
689 siliconforks 92 Stream_write_string(f, ") {\n");
690 siliconforks 240 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, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
695     }
696     instrument_statement(node->pn_kid2, f, indent + 2, false);
697 siliconforks 92 Stream_printf(f, "%*s", indent, "");
698     Stream_write_string(f, "}\n");
699 siliconforks 240
700     if (node->pn_kid3 || is_jscoverage_if) {
701 siliconforks 92 Stream_printf(f, "%*s", indent, "");
702     Stream_write_string(f, "else {\n");
703 siliconforks 240
704     if (is_jscoverage_if) {
705     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
706     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
707     Stream_printf(f, "%*s", indent + 2, "");
708     Stream_printf(f, "_$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 siliconforks 92 Stream_printf(f, "%*s", indent, "");
716     Stream_write_string(f, "}\n");
717 siliconforks 2 }
718 siliconforks 240
719 siliconforks 2 break;
720 siliconforks 240 }
721 siliconforks 2 case TOK_SWITCH:
722     assert(node->pn_arity == PN_BINARY);
723 siliconforks 92 Stream_printf(f, "%*s", indent, "");
724     Stream_write_string(f, "switch (");
725 siliconforks 2 instrument_expression(node->pn_left, f);
726 siliconforks 92 Stream_write_string(f, ") {\n");
727 siliconforks 2 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
728 siliconforks 92 Stream_printf(f, "%*s", indent, "");
729 siliconforks 2 switch (p->pn_type) {
730     case TOK_CASE:
731 siliconforks 92 Stream_write_string(f, "case ");
732 siliconforks 2 instrument_expression(p->pn_left, f);
733 siliconforks 92 Stream_write_string(f, ":\n");
734 siliconforks 2 break;
735     case TOK_DEFAULT:
736 siliconforks 92 Stream_write_string(f, "default:\n");
737 siliconforks 2 break;
738     default:
739     abort();
740     break;
741     }
742 siliconforks 240 instrument_statement(p->pn_right, f, indent + 2, false);
743 siliconforks 2 }
744 siliconforks 92 Stream_printf(f, "%*s", indent, "");
745     Stream_write_string(f, "}\n");
746 siliconforks 2 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 siliconforks 92 Stream_printf(f, "%*s", indent, "");
754     Stream_write_string(f, "while (");
755 siliconforks 2 instrument_expression(node->pn_left, f);
756 siliconforks 92 Stream_write_string(f, ") {\n");
757 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
758 siliconforks 92 Stream_write_string(f, "}\n");
759 siliconforks 2 break;
760     case TOK_DO:
761     assert(node->pn_arity == PN_BINARY);
762 siliconforks 92 Stream_printf(f, "%*s", indent, "");
763     Stream_write_string(f, "do {\n");
764 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
765 siliconforks 92 Stream_write_string(f, "}\n");
766     Stream_printf(f, "%*s", indent, "");
767     Stream_write_string(f, "while (");
768 siliconforks 2 instrument_expression(node->pn_right, f);
769 siliconforks 92 Stream_write_string(f, ");\n");
770 siliconforks 2 break;
771     case TOK_FOR:
772     assert(node->pn_arity == PN_BINARY);
773 siliconforks 92 Stream_printf(f, "%*s", indent, "");
774 siliconforks 339 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 siliconforks 2 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 siliconforks 92 Stream_write_string(f, " in ");
802 siliconforks 2 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 siliconforks 92 Stream_write_string(f, ";");
816 siliconforks 2 if (node->pn_left->pn_kid2) {
817 siliconforks 92 Stream_write_char(f, ' ');
818 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
819     }
820 siliconforks 92 Stream_write_string(f, ";");
821 siliconforks 2 if (node->pn_left->pn_kid3) {
822 siliconforks 92 Stream_write_char(f, ' ');
823 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
824     }
825     break;
826     default:
827     abort();
828     break;
829     }
830 siliconforks 92 Stream_write_string(f, ") {\n");
831 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
832 siliconforks 92 Stream_write_string(f, "}\n");
833 siliconforks 2 break;
834     case TOK_THROW:
835     assert(node->pn_arity == PN_UNARY);
836 siliconforks 92 Stream_printf(f, "%*s", indent, "");
837     Stream_write_string(f, "throw ");
838 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
839 siliconforks 92 Stream_write_string(f, ";\n");
840 siliconforks 2 break;
841     case TOK_TRY:
842 siliconforks 92 Stream_printf(f, "%*s", indent, "");
843     Stream_write_string(f, "try {\n");
844 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
845 siliconforks 92 Stream_printf(f, "%*s", indent, "");
846     Stream_write_string(f, "}\n");
847 siliconforks 336 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 siliconforks 2 assert(catch->pn_type == TOK_CATCH);
853 siliconforks 92 Stream_printf(f, "%*s", indent, "");
854     Stream_write_string(f, "catch (");
855 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
856     print_string_atom(catch->pn_kid1->pn_atom, f);
857 siliconforks 336 if (catch->pn_kid2) {
858 siliconforks 92 Stream_write_string(f, " if ");
859 siliconforks 336 instrument_expression(catch->pn_kid2, f);
860 siliconforks 2 }
861 siliconforks 92 Stream_write_string(f, ") {\n");
862 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
863 siliconforks 92 Stream_printf(f, "%*s", indent, "");
864     Stream_write_string(f, "}\n");
865 siliconforks 2 }
866     }
867     if (node->pn_kid3) {
868 siliconforks 92 Stream_printf(f, "%*s", indent, "");
869     Stream_write_string(f, "finally {\n");
870 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
871 siliconforks 92 Stream_printf(f, "%*s", indent, "");
872     Stream_write_string(f, "}\n");
873 siliconforks 2 }
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 siliconforks 92 Stream_printf(f, "%*s", indent, "");
882     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
883 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
884     if (atom != NULL) {
885 siliconforks 92 Stream_write_char(f, ' ');
886 siliconforks 2 print_string_atom(node->pn_atom, f);
887     }
888 siliconforks 92 Stream_write_string(f, ";\n");
889 siliconforks 2 break;
890     case TOK_WITH:
891     assert(node->pn_arity == PN_BINARY);
892 siliconforks 92 Stream_printf(f, "%*s", indent, "");
893     Stream_write_string(f, "with (");
894 siliconforks 2 instrument_expression(node->pn_left, f);
895 siliconforks 92 Stream_write_string(f, ") {\n");
896 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
897 siliconforks 92 Stream_printf(f, "%*s", indent, "");
898     Stream_write_string(f, "}\n");
899 siliconforks 2 break;
900     case TOK_VAR:
901     instrument_var_statement(node, f, indent);
902 siliconforks 92 Stream_write_string(f, ";\n");
903 siliconforks 2 break;
904     case TOK_RETURN:
905     assert(node->pn_arity == PN_UNARY);
906 siliconforks 92 Stream_printf(f, "%*s", indent, "");
907     Stream_write_string(f, "return");
908 siliconforks 2 if (node->pn_kid != NULL) {
909 siliconforks 92 Stream_write_char(f, ' ');
910 siliconforks 2 instrument_expression(node->pn_kid, f);
911     }
912 siliconforks 92 Stream_write_string(f, ";\n");
913 siliconforks 2 break;
914     case TOK_SEMI:
915     assert(node->pn_arity == PN_UNARY);
916 siliconforks 92 Stream_printf(f, "%*s", indent, "");
917 siliconforks 2 if (node->pn_kid != NULL) {
918     instrument_expression(node->pn_kid, f);
919     }
920 siliconforks 92 Stream_write_string(f, ";\n");
921 siliconforks 2 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 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
929 siliconforks 2 print_string_atom(node->pn_atom, f);
930 siliconforks 92 Stream_write_string(f, ":\n");
931 siliconforks 2 /*
932     ... use output_statement instead of instrument_statement.
933     */
934 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
935 siliconforks 2 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 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
947 siliconforks 2 if (node->pn_type != TOK_LC) {
948 siliconforks 214 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 siliconforks 2 /* the root node has line number 0 */
954     if (line != 0) {
955 siliconforks 92 Stream_printf(f, "%*s", indent, "");
956     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
957 siliconforks 2 lines[line - 1] = 1;
958     }
959     }
960 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
961 siliconforks 2 }
962    
963 siliconforks 190 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 siliconforks 240 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 siliconforks 284 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 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1002 siliconforks 2 file_id = id;
1003    
1004 siliconforks 336 /* parse the javascript */
1005     JSParseContext parse_context;
1006     if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1007 siliconforks 2 fatal("cannot create token stream from file: %s", file_id);
1008     }
1009 siliconforks 284 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1010 siliconforks 336 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1011 siliconforks 2 if (node == NULL) {
1012 siliconforks 284 js_ReportUncaughtException(context);
1013 siliconforks 2 fatal("parse error in file: %s", file_id);
1014     }
1015 siliconforks 284 JS_SetErrorReporter(context, old_error_reporter);
1016 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1017 siliconforks 2 lines = xmalloc(num_lines);
1018 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1019 siliconforks 2 lines[i] = 0;
1020     }
1021    
1022 siliconforks 240 /* 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 siliconforks 2 }
1027    
1028 siliconforks 157 bool has_conditionals = false;
1029 siliconforks 240 struct IfDirective * if_directives = NULL;
1030 siliconforks 157 size_t line_number = 0;
1031     size_t i = 0;
1032 siliconforks 176 while (i < num_characters) {
1033 siliconforks 240 if (line_number == UINT16_MAX) {
1034     fatal("%s: script has more than 65,535 lines", file_id);
1035     }
1036 siliconforks 157 line_number++;
1037     size_t line_start = i;
1038 siliconforks 190 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 siliconforks 157 }
1053     size_t line_end = i;
1054 siliconforks 176 if (i < num_characters) {
1055 siliconforks 190 i++;
1056     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1057 siliconforks 157 i++;
1058     }
1059     }
1060 siliconforks 240
1061 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1062 siliconforks 240 has_conditionals = true;
1063    
1064     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1065     exclusive_directives[line_number - 1] = true;
1066 siliconforks 157 }
1067 siliconforks 240 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 siliconforks 190 }
1076 siliconforks 157 }
1077 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1078 siliconforks 240 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 siliconforks 157 }
1085     }
1086    
1087 siliconforks 240 /*
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 siliconforks 336 js_FinishParseContext(context, &parse_context);
1098 siliconforks 240
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, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1119     }
1120    
1121     /* copy the instrumented source code to the output */
1122     Stream_write(output, instrumented->data, instrumented->length);
1123    
1124     /* conditionals */
1125     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1126     Stream_write_string(output, "if (!(");
1127 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1128 siliconforks 240 Stream_write_string(output, ")) {\n");
1129     Stream_printf(output, " _$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 siliconforks 95 /* copy the original source to the output */
1141 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1142     jscoverage_write_source(id, characters, num_characters, output);
1143     Stream_printf(output, ";\n");
1144 siliconforks 95
1145 siliconforks 179 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 siliconforks 317 /* IE doesn't support this */
1179     /*
1180 siliconforks 179 case 0xb:
1181     Stream_write_string(output, "\\v");
1182     break;
1183 siliconforks 317 */
1184 siliconforks 179 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 siliconforks 95 i++;
1206 siliconforks 179 if (i >= highlighted_stream->length) {
1207     done = true;
1208 siliconforks 95 }
1209     }
1210 siliconforks 179 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 siliconforks 317 /* IE doesn't support this */
1239     /*
1240 siliconforks 179 case 0xb:
1241     Stream_write_string(output, "\\v");
1242     break;
1243 siliconforks 317 */
1244 siliconforks 179 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 siliconforks 95 i++;
1284 siliconforks 179 if (i >= num_characters) {
1285     done = true;
1286     }
1287 siliconforks 95 }
1288 siliconforks 179 Stream_write_char(output, '"');
1289 siliconforks 95 }
1290     }
1291 siliconforks 179 Stream_write_string(output, "]");
1292 siliconforks 2 }
1293 siliconforks 116
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 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1299 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1300 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1301 siliconforks 116 }
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 siliconforks 179 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 siliconforks 116 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 siliconforks 336 int result = 0;
1371    
1372 siliconforks 116 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 siliconforks 336 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 siliconforks 116 }
1389 siliconforks 336 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1390 siliconforks 116 free(parenthesized_json);
1391     if (root == NULL) {
1392 siliconforks 336 result = -1;
1393     goto done;
1394 siliconforks 116 }
1395    
1396     /* root node must be TOK_LC */
1397     if (root->pn_type != TOK_LC) {
1398 siliconforks 336 result = -1;
1399     goto done;
1400 siliconforks 116 }
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 siliconforks 336 result = -1;
1406     goto done;
1407 siliconforks 116 }
1408     JSParseNode * parenthesized = semi->pn_kid;
1409    
1410     /* this must be a parenthesized expression */
1411     if (parenthesized->pn_type != TOK_RP) {
1412 siliconforks 336 result = -1;
1413     goto done;
1414 siliconforks 116 }
1415     JSParseNode * object = parenthesized->pn_kid;
1416    
1417     /* this must be an object literal */
1418     if (object->pn_type != TOK_RC) {
1419 siliconforks 336 result = -1;
1420     goto done;
1421 siliconforks 116 }
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 siliconforks 336 result = -1;
1427     goto done;
1428 siliconforks 116 }
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 siliconforks 336 result = -1;
1434     goto done;
1435 siliconforks 116 }
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 siliconforks 336 result = -1;
1442     goto done;
1443 siliconforks 116 }
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 siliconforks 336 result = -1;
1455     goto done;
1456 siliconforks 116 }
1457     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1458     if (element->pn_type != TOK_COLON) {
1459 siliconforks 336 result = -1;
1460     goto done;
1461 siliconforks 116 }
1462     JSParseNode * left = element->pn_left;
1463     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1464 siliconforks 336 result = -1;
1465     goto done;
1466 siliconforks 116 }
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 siliconforks 336 result = -1;
1472     goto done;
1473 siliconforks 116 }
1474     }
1475     else if (strcmp(s, "source") == 0) {
1476     source = element->pn_right;
1477 siliconforks 179 if (source->pn_type != TOK_RB) {
1478 siliconforks 336 result = -1;
1479     goto done;
1480 siliconforks 116 }
1481     }
1482     else {
1483 siliconforks 336 result = -1;
1484     goto done;
1485 siliconforks 116 }
1486     }
1487     }
1488     else {
1489 siliconforks 336 result = -1;
1490     goto done;
1491 siliconforks 116 }
1492    
1493     if (array == NULL) {
1494 siliconforks 336 result = -1;
1495     goto done;
1496 siliconforks 116 }
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 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1506     file_coverage->coverage_lines = xnew(int, array->pn_count);
1507 siliconforks 245 file_coverage->source_lines = NULL;
1508 siliconforks 116
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 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1514 siliconforks 116 }
1515     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1516 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1517 siliconforks 116 }
1518     else {
1519 siliconforks 336 result = -1;
1520     goto done;
1521 siliconforks 116 }
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 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1536 siliconforks 336 result = -2;
1537     goto done;
1538 siliconforks 116 }
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 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1545 siliconforks 336 result = -2;
1546     goto done;
1547 siliconforks 116 }
1548 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1549 siliconforks 116 }
1550     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1551 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1552 siliconforks 336 result = -2;
1553     goto done;
1554 siliconforks 116 }
1555     }
1556     else {
1557 siliconforks 336 result = -1;
1558     goto done;
1559 siliconforks 116 }
1560     }
1561     assert(i == array->pn_count);
1562 siliconforks 245 }
1563 siliconforks 116
1564 siliconforks 245 /* 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 siliconforks 336 result = -1;
1572     goto done;
1573 siliconforks 179 }
1574 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1575 siliconforks 116 }
1576 siliconforks 245 assert(i == source->pn_count);
1577 siliconforks 116 }
1578     }
1579    
1580 siliconforks 336 done:
1581     js_FinishParseContext(context, &parse_context);
1582     return result;
1583 siliconforks 116 }

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