/[jscoverage]/trunk/instrument-js.c
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Revision 341 - (hide annotations)
Fri Oct 24 16:14:43 2008 UTC (10 years, 8 months ago) by siliconforks
File MIME type: text/plain
File size: 48362 byte(s)
Add support for destructuring assignment in JS 1.7.
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 siliconforks 340 static void instrument_declarations(JSParseNode * list, Stream * f) {
328     assert(list->pn_arity == PN_LIST);
329     for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
330 siliconforks 341 switch (p->pn_type) {
331     case TOK_NAME:
332     assert(p->pn_arity == PN_NAME);
333     if (p != list->pn_head) {
334     Stream_write_string(f, ", ");
335     }
336     print_string_atom(p->pn_atom, f);
337     if (p->pn_expr != NULL) {
338     Stream_write_string(f, " = ");
339     instrument_expression(p->pn_expr, f);
340     }
341     break;
342     case TOK_ASSIGN:
343     case TOK_RB:
344     case TOK_RC:
345     /* destructuring */
346     instrument_expression(p, f);
347     break;
348     default:
349     abort();
350     break;
351 siliconforks 340 }
352     }
353     }
354    
355 siliconforks 2 /*
356     See <Expressions> in jsparse.h.
357     TOK_FUNCTION is handled as a statement and as an expression.
358     TOK_DBLDOT is not handled (XML op).
359     TOK_DEFSHARP and TOK_USESHARP are not handled.
360     TOK_ANYNAME is not handled (XML op).
361     TOK_AT is not handled (XML op).
362     TOK_DBLCOLON is not handled.
363     TOK_XML* are not handled.
364     There seem to be some undocumented expressions:
365     TOK_INSTANCEOF binary
366     TOK_IN binary
367     */
368 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
369 siliconforks 2 switch (node->pn_type) {
370     case TOK_FUNCTION:
371 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
372 siliconforks 2 break;
373     case TOK_COMMA:
374     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
375     if (p != node->pn_head) {
376 siliconforks 92 Stream_write_string(f, ", ");
377 siliconforks 2 }
378     instrument_expression(p, f);
379     }
380     break;
381     case TOK_ASSIGN:
382     instrument_expression(node->pn_left, f);
383 siliconforks 92 Stream_write_char(f, ' ');
384 siliconforks 2 switch (node->pn_op) {
385     case JSOP_ADD:
386     case JSOP_SUB:
387     case JSOP_MUL:
388     case JSOP_MOD:
389     case JSOP_LSH:
390     case JSOP_RSH:
391     case JSOP_URSH:
392     case JSOP_BITAND:
393     case JSOP_BITOR:
394     case JSOP_BITXOR:
395     case JSOP_DIV:
396 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
397 siliconforks 2 break;
398     default:
399     /* do nothing - it must be a simple assignment */
400     break;
401     }
402 siliconforks 92 Stream_write_string(f, "= ");
403 siliconforks 2 instrument_expression(node->pn_right, f);
404     break;
405     case TOK_HOOK:
406     instrument_expression(node->pn_kid1, f);
407 siliconforks 92 Stream_write_string(f, "? ");
408 siliconforks 2 instrument_expression(node->pn_kid2, f);
409 siliconforks 92 Stream_write_string(f, ": ");
410 siliconforks 2 instrument_expression(node->pn_kid3, f);
411     break;
412     case TOK_OR:
413     case TOK_AND:
414     case TOK_BITOR:
415     case TOK_BITXOR:
416     case TOK_BITAND:
417     case TOK_EQOP:
418     case TOK_RELOP:
419     case TOK_SHOP:
420     case TOK_PLUS:
421     case TOK_MINUS:
422     case TOK_STAR:
423     case TOK_DIVOP:
424     switch (node->pn_arity) {
425     case PN_BINARY:
426     instrument_expression(node->pn_left, f);
427 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
428 siliconforks 2 instrument_expression(node->pn_right, f);
429     break;
430     case PN_LIST:
431     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
432     if (p != node->pn_head) {
433 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
434 siliconforks 2 }
435     instrument_expression(p, f);
436     }
437     break;
438     default:
439     abort();
440     }
441     break;
442     case TOK_UNARYOP:
443     switch (node->pn_op) {
444     case JSOP_NEG:
445 siliconforks 92 Stream_write_char(f, '-');
446 siliconforks 2 instrument_expression(node->pn_kid, f);
447     break;
448     case JSOP_POS:
449 siliconforks 92 Stream_write_char(f, '+');
450 siliconforks 2 instrument_expression(node->pn_kid, f);
451     break;
452     case JSOP_NOT:
453 siliconforks 92 Stream_write_char(f, '!');
454 siliconforks 2 instrument_expression(node->pn_kid, f);
455     break;
456     case JSOP_BITNOT:
457 siliconforks 92 Stream_write_char(f, '~');
458 siliconforks 2 instrument_expression(node->pn_kid, f);
459     break;
460     case JSOP_TYPEOF:
461 siliconforks 92 Stream_write_string(f, "typeof ");
462 siliconforks 2 instrument_expression(node->pn_kid, f);
463     break;
464     case JSOP_VOID:
465 siliconforks 92 Stream_write_string(f, "void ");
466 siliconforks 2 instrument_expression(node->pn_kid, f);
467     break;
468     default:
469     abort();
470     break;
471     }
472     break;
473     case TOK_INC:
474     case TOK_DEC:
475     /*
476     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
477     */
478     switch (node->pn_op) {
479     case JSOP_INCNAME:
480     case JSOP_INCPROP:
481     case JSOP_INCELEM:
482 siliconforks 92 Stream_write_string(f, "++");
483 siliconforks 2 instrument_expression(node->pn_kid, f);
484     break;
485     case JSOP_DECNAME:
486     case JSOP_DECPROP:
487     case JSOP_DECELEM:
488 siliconforks 92 Stream_write_string(f, "--");
489 siliconforks 2 instrument_expression(node->pn_kid, f);
490     break;
491     case JSOP_NAMEINC:
492     case JSOP_PROPINC:
493     case JSOP_ELEMINC:
494     instrument_expression(node->pn_kid, f);
495 siliconforks 92 Stream_write_string(f, "++");
496 siliconforks 2 break;
497     case JSOP_NAMEDEC:
498     case JSOP_PROPDEC:
499     case JSOP_ELEMDEC:
500     instrument_expression(node->pn_kid, f);
501 siliconforks 92 Stream_write_string(f, "--");
502 siliconforks 2 break;
503     default:
504     abort();
505     break;
506     }
507     break;
508     case TOK_NEW:
509 siliconforks 92 Stream_write_string(f, "new ");
510 siliconforks 2 instrument_function_call(node, f);
511     break;
512     case TOK_DELETE:
513 siliconforks 92 Stream_write_string(f, "delete ");
514 siliconforks 2 instrument_expression(node->pn_kid, f);
515     break;
516     case TOK_DOT:
517     /*
518     This may have originally been x['foo-bar']. Because the string 'foo-bar'
519     contains illegal characters, we have to use the subscript syntax instead of
520     the dot syntax.
521     */
522     instrument_expression(node->pn_expr, f);
523 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
524     {
525     JSString * s = ATOM_TO_STRING(node->pn_atom);
526 siliconforks 336 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
527     if (! is_keyword && js_IsIdentifier(s)) {
528 siliconforks 92 Stream_write_char(f, '.');
529 siliconforks 84 print_string_atom(node->pn_atom, f);
530     }
531     else {
532 siliconforks 92 Stream_write_char(f, '[');
533 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
534 siliconforks 92 Stream_write_char(f, ']');
535 siliconforks 84 }
536     }
537 siliconforks 2 break;
538     case TOK_LB:
539     instrument_expression(node->pn_left, f);
540 siliconforks 92 Stream_write_char(f, '[');
541 siliconforks 2 instrument_expression(node->pn_right, f);
542 siliconforks 92 Stream_write_char(f, ']');
543 siliconforks 2 break;
544     case TOK_LP:
545     instrument_function_call(node, f);
546     break;
547     case TOK_RB:
548 siliconforks 92 Stream_write_char(f, '[');
549 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
550     if (p != node->pn_head) {
551 siliconforks 92 Stream_write_string(f, ", ");
552 siliconforks 2 }
553     /* TOK_COMMA is a special case: a hole in the array */
554     if (p->pn_type != TOK_COMMA) {
555     instrument_expression(p, f);
556     }
557     }
558     if (node->pn_extra == PNX_ENDCOMMA) {
559 siliconforks 92 Stream_write_char(f, ',');
560 siliconforks 2 }
561 siliconforks 92 Stream_write_char(f, ']');
562 siliconforks 2 break;
563     case TOK_RC:
564 siliconforks 92 Stream_write_char(f, '{');
565 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
566     assert(p->pn_type == TOK_COLON);
567     if (p != node->pn_head) {
568 siliconforks 92 Stream_write_string(f, ", ");
569 siliconforks 2 }
570 siliconforks 155
571     /* check whether this is a getter or setter */
572     switch (p->pn_op) {
573     case JSOP_GETTER:
574     case JSOP_SETTER:
575 siliconforks 293 if (p->pn_op == JSOP_GETTER) {
576     Stream_write_string(f, "get ");
577     }
578     else {
579     Stream_write_string(f, "set ");
580     }
581 siliconforks 155 instrument_expression(p->pn_left, f);
582 siliconforks 293 if (p->pn_right->pn_type != TOK_FUNCTION) {
583     fatal("parse error: expected function");
584     }
585 siliconforks 155 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
586     break;
587     default:
588     instrument_expression(p->pn_left, f);
589     Stream_write_string(f, ": ");
590     instrument_expression(p->pn_right, f);
591     break;
592     }
593 siliconforks 2 }
594 siliconforks 92 Stream_write_char(f, '}');
595 siliconforks 2 break;
596     case TOK_RP:
597 siliconforks 92 Stream_write_char(f, '(');
598 siliconforks 2 instrument_expression(node->pn_kid, f);
599 siliconforks 92 Stream_write_char(f, ')');
600 siliconforks 2 break;
601     case TOK_NAME:
602     print_string_atom(node->pn_atom, f);
603     break;
604     case TOK_STRING:
605     print_quoted_string_atom(node->pn_atom, f);
606     break;
607 siliconforks 336 case TOK_REGEXP:
608     assert(node->pn_op == JSOP_REGEXP);
609     {
610     JSObject * object = node->pn_pob->object;
611     jsval result;
612     js_regexp_toString(context, object, &result);
613     print_regex(result, f);
614 siliconforks 2 }
615     break;
616     case TOK_NUMBER:
617     /*
618     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
619     2^(-52) = 2.22 x 10^(-16)
620     Thus there are 16 significant digits.
621     To keep the output simple, special-case zero.
622     */
623     if (node->pn_dval == 0.0) {
624 siliconforks 92 Stream_write_string(f, "0");
625 siliconforks 2 }
626     else {
627 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
628 siliconforks 2 }
629     break;
630     case TOK_PRIMARY:
631     switch (node->pn_op) {
632     case JSOP_TRUE:
633 siliconforks 92 Stream_write_string(f, "true");
634 siliconforks 2 break;
635     case JSOP_FALSE:
636 siliconforks 92 Stream_write_string(f, "false");
637 siliconforks 2 break;
638     case JSOP_NULL:
639 siliconforks 92 Stream_write_string(f, "null");
640 siliconforks 2 break;
641     case JSOP_THIS:
642 siliconforks 92 Stream_write_string(f, "this");
643 siliconforks 2 break;
644     /* jsscan.h mentions `super' ??? */
645     default:
646     abort();
647     }
648     break;
649     case TOK_INSTANCEOF:
650     instrument_expression(node->pn_left, f);
651 siliconforks 92 Stream_write_string(f, " instanceof ");
652 siliconforks 2 instrument_expression(node->pn_right, f);
653     break;
654     case TOK_IN:
655     instrument_expression(node->pn_left, f);
656 siliconforks 92 Stream_write_string(f, " in ");
657 siliconforks 2 instrument_expression(node->pn_right, f);
658     break;
659 siliconforks 340 case TOK_LEXICALSCOPE:
660     assert(node->pn_arity == PN_NAME);
661     assert(node->pn_expr->pn_type == TOK_LET);
662     assert(node->pn_expr->pn_arity == PN_BINARY);
663     Stream_write_string(f, "let(");
664     assert(node->pn_expr->pn_left->pn_type == TOK_LP);
665     assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
666     instrument_declarations(node->pn_expr->pn_left, f);
667     Stream_write_string(f, ") ");
668     instrument_expression(node->pn_expr->pn_right, f);
669     break;
670 siliconforks 2 default:
671     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
672     }
673     }
674    
675 siliconforks 92 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
676 siliconforks 2 assert(node->pn_arity == PN_LIST);
677 siliconforks 92 Stream_printf(f, "%*s", indent, "");
678     Stream_write_string(f, "var ");
679 siliconforks 340 instrument_declarations(node, f);
680 siliconforks 2 }
681    
682 siliconforks 340 static void instrument_let_definition(JSParseNode * node, Stream * f, int indent) {
683     assert(node->pn_arity == PN_LIST);
684     Stream_printf(f, "%*s", indent, "");
685     Stream_write_string(f, "let ");
686     instrument_declarations(node, f);
687     }
688    
689 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
690 siliconforks 2 switch (node->pn_type) {
691     case TOK_FUNCTION:
692 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
693 siliconforks 2 break;
694     case TOK_LC:
695     assert(node->pn_arity == PN_LIST);
696     /*
697 siliconforks 92 Stream_write_string(f, "{\n");
698 siliconforks 2 */
699     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
700 siliconforks 240 instrument_statement(p, f, indent, false);
701 siliconforks 2 }
702     /*
703 siliconforks 92 Stream_printf(f, "%*s", indent, "");
704     Stream_write_string(f, "}\n");
705 siliconforks 2 */
706     break;
707     case TOK_IF:
708 siliconforks 240 {
709 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
710 siliconforks 240
711     uint16_t line = node->pn_pos.begin.lineno;
712     if (! is_jscoverage_if) {
713     if (line > num_lines) {
714     fatal("%s: script contains more than 65,535 lines", file_id);
715     }
716     if (line >= 2 && exclusive_directives[line - 2]) {
717     is_jscoverage_if = true;
718     }
719     }
720    
721 siliconforks 92 Stream_printf(f, "%*s", indent, "");
722     Stream_write_string(f, "if (");
723 siliconforks 2 instrument_expression(node->pn_kid1, f);
724 siliconforks 92 Stream_write_string(f, ") {\n");
725 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
726     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
727     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
728     Stream_printf(f, "%*s", indent + 2, "");
729     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
730     }
731     instrument_statement(node->pn_kid2, f, indent + 2, false);
732 siliconforks 92 Stream_printf(f, "%*s", indent, "");
733     Stream_write_string(f, "}\n");
734 siliconforks 240
735     if (node->pn_kid3 || is_jscoverage_if) {
736 siliconforks 92 Stream_printf(f, "%*s", indent, "");
737     Stream_write_string(f, "else {\n");
738 siliconforks 240
739     if (is_jscoverage_if) {
740     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
741     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
742     Stream_printf(f, "%*s", indent + 2, "");
743     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
744     }
745    
746     if (node->pn_kid3) {
747     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
748     }
749    
750 siliconforks 92 Stream_printf(f, "%*s", indent, "");
751     Stream_write_string(f, "}\n");
752 siliconforks 2 }
753 siliconforks 240
754 siliconforks 2 break;
755 siliconforks 240 }
756 siliconforks 2 case TOK_SWITCH:
757     assert(node->pn_arity == PN_BINARY);
758 siliconforks 92 Stream_printf(f, "%*s", indent, "");
759     Stream_write_string(f, "switch (");
760 siliconforks 2 instrument_expression(node->pn_left, f);
761 siliconforks 92 Stream_write_string(f, ") {\n");
762 siliconforks 2 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
763 siliconforks 92 Stream_printf(f, "%*s", indent, "");
764 siliconforks 2 switch (p->pn_type) {
765     case TOK_CASE:
766 siliconforks 92 Stream_write_string(f, "case ");
767 siliconforks 2 instrument_expression(p->pn_left, f);
768 siliconforks 92 Stream_write_string(f, ":\n");
769 siliconforks 2 break;
770     case TOK_DEFAULT:
771 siliconforks 92 Stream_write_string(f, "default:\n");
772 siliconforks 2 break;
773     default:
774     abort();
775     break;
776     }
777 siliconforks 240 instrument_statement(p->pn_right, f, indent + 2, false);
778 siliconforks 2 }
779 siliconforks 92 Stream_printf(f, "%*s", indent, "");
780     Stream_write_string(f, "}\n");
781 siliconforks 2 break;
782     case TOK_CASE:
783     case TOK_DEFAULT:
784     abort();
785     break;
786     case TOK_WHILE:
787     assert(node->pn_arity == PN_BINARY);
788 siliconforks 92 Stream_printf(f, "%*s", indent, "");
789     Stream_write_string(f, "while (");
790 siliconforks 2 instrument_expression(node->pn_left, f);
791 siliconforks 92 Stream_write_string(f, ") {\n");
792 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
793 siliconforks 92 Stream_write_string(f, "}\n");
794 siliconforks 2 break;
795     case TOK_DO:
796     assert(node->pn_arity == PN_BINARY);
797 siliconforks 92 Stream_printf(f, "%*s", indent, "");
798     Stream_write_string(f, "do {\n");
799 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
800 siliconforks 92 Stream_write_string(f, "}\n");
801     Stream_printf(f, "%*s", indent, "");
802     Stream_write_string(f, "while (");
803 siliconforks 2 instrument_expression(node->pn_right, f);
804 siliconforks 92 Stream_write_string(f, ");\n");
805 siliconforks 2 break;
806     case TOK_FOR:
807     assert(node->pn_arity == PN_BINARY);
808 siliconforks 92 Stream_printf(f, "%*s", indent, "");
809 siliconforks 339 Stream_write_string(f, "for ");
810     if (node->pn_iflags & JSITER_FOREACH) {
811     Stream_write_string(f, "each ");
812     }
813     Stream_write_char(f, '(');
814 siliconforks 2 switch (node->pn_left->pn_type) {
815     case TOK_IN:
816     /* for/in */
817     assert(node->pn_left->pn_arity == PN_BINARY);
818     switch (node->pn_left->pn_left->pn_type) {
819     case TOK_VAR:
820     instrument_var_statement(node->pn_left->pn_left, f, 0);
821     break;
822 siliconforks 340 case TOK_LET:
823     instrument_let_definition(node->pn_left->pn_left, f, 0);
824     break;
825 siliconforks 2 case TOK_NAME:
826     instrument_expression(node->pn_left->pn_left, f);
827     break;
828     default:
829     /* this is undocumented: for (x.value in y) */
830     instrument_expression(node->pn_left->pn_left, f);
831     break;
832     /*
833     default:
834     fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
835     abort();
836     break;
837     */
838     }
839 siliconforks 92 Stream_write_string(f, " in ");
840 siliconforks 2 instrument_expression(node->pn_left->pn_right, f);
841     break;
842     case TOK_RESERVED:
843     /* for (;;) */
844     assert(node->pn_left->pn_arity == PN_TERNARY);
845     if (node->pn_left->pn_kid1) {
846 siliconforks 340 switch (node->pn_left->pn_kid1->pn_type) {
847     case TOK_VAR:
848 siliconforks 2 instrument_var_statement(node->pn_left->pn_kid1, f, 0);
849 siliconforks 340 break;
850     case TOK_LET:
851     instrument_let_definition(node->pn_left->pn_kid1, f, 0);
852     break;
853     default:
854 siliconforks 2 instrument_expression(node->pn_left->pn_kid1, f);
855 siliconforks 340 break;
856 siliconforks 2 }
857     }
858 siliconforks 92 Stream_write_string(f, ";");
859 siliconforks 2 if (node->pn_left->pn_kid2) {
860 siliconforks 92 Stream_write_char(f, ' ');
861 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
862     }
863 siliconforks 92 Stream_write_string(f, ";");
864 siliconforks 2 if (node->pn_left->pn_kid3) {
865 siliconforks 92 Stream_write_char(f, ' ');
866 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
867     }
868     break;
869     default:
870     abort();
871     break;
872     }
873 siliconforks 92 Stream_write_string(f, ") {\n");
874 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
875 siliconforks 92 Stream_write_string(f, "}\n");
876 siliconforks 2 break;
877     case TOK_THROW:
878     assert(node->pn_arity == PN_UNARY);
879 siliconforks 92 Stream_printf(f, "%*s", indent, "");
880     Stream_write_string(f, "throw ");
881 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
882 siliconforks 92 Stream_write_string(f, ";\n");
883 siliconforks 2 break;
884     case TOK_TRY:
885 siliconforks 92 Stream_printf(f, "%*s", indent, "");
886     Stream_write_string(f, "try {\n");
887 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
888 siliconforks 92 Stream_printf(f, "%*s", indent, "");
889     Stream_write_string(f, "}\n");
890 siliconforks 336 if (node->pn_kid2) {
891     assert(node->pn_kid2->pn_type == TOK_RESERVED);
892     for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
893     assert(scope->pn_type == TOK_LEXICALSCOPE);
894     JSParseNode * catch = scope->pn_expr;
895 siliconforks 2 assert(catch->pn_type == TOK_CATCH);
896 siliconforks 92 Stream_printf(f, "%*s", indent, "");
897     Stream_write_string(f, "catch (");
898 siliconforks 341 /* this may not be a name - destructuring assignment */
899     /*
900 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
901     print_string_atom(catch->pn_kid1->pn_atom, f);
902 siliconforks 341 */
903     instrument_expression(catch->pn_kid1, f);
904 siliconforks 336 if (catch->pn_kid2) {
905 siliconforks 92 Stream_write_string(f, " if ");
906 siliconforks 336 instrument_expression(catch->pn_kid2, f);
907 siliconforks 2 }
908 siliconforks 92 Stream_write_string(f, ") {\n");
909 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
910 siliconforks 92 Stream_printf(f, "%*s", indent, "");
911     Stream_write_string(f, "}\n");
912 siliconforks 2 }
913     }
914     if (node->pn_kid3) {
915 siliconforks 92 Stream_printf(f, "%*s", indent, "");
916     Stream_write_string(f, "finally {\n");
917 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
918 siliconforks 92 Stream_printf(f, "%*s", indent, "");
919     Stream_write_string(f, "}\n");
920 siliconforks 2 }
921     break;
922     case TOK_CATCH:
923     abort();
924     break;
925     case TOK_BREAK:
926     case TOK_CONTINUE:
927     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
928 siliconforks 92 Stream_printf(f, "%*s", indent, "");
929     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
930 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
931     if (atom != NULL) {
932 siliconforks 92 Stream_write_char(f, ' ');
933 siliconforks 2 print_string_atom(node->pn_atom, f);
934     }
935 siliconforks 92 Stream_write_string(f, ";\n");
936 siliconforks 2 break;
937     case TOK_WITH:
938     assert(node->pn_arity == PN_BINARY);
939 siliconforks 92 Stream_printf(f, "%*s", indent, "");
940     Stream_write_string(f, "with (");
941 siliconforks 2 instrument_expression(node->pn_left, f);
942 siliconforks 92 Stream_write_string(f, ") {\n");
943 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
944 siliconforks 92 Stream_printf(f, "%*s", indent, "");
945     Stream_write_string(f, "}\n");
946 siliconforks 2 break;
947     case TOK_VAR:
948     instrument_var_statement(node, f, indent);
949 siliconforks 92 Stream_write_string(f, ";\n");
950 siliconforks 2 break;
951     case TOK_RETURN:
952     assert(node->pn_arity == PN_UNARY);
953 siliconforks 92 Stream_printf(f, "%*s", indent, "");
954     Stream_write_string(f, "return");
955 siliconforks 2 if (node->pn_kid != NULL) {
956 siliconforks 92 Stream_write_char(f, ' ');
957 siliconforks 2 instrument_expression(node->pn_kid, f);
958     }
959 siliconforks 92 Stream_write_string(f, ";\n");
960 siliconforks 2 break;
961     case TOK_SEMI:
962     assert(node->pn_arity == PN_UNARY);
963 siliconforks 92 Stream_printf(f, "%*s", indent, "");
964 siliconforks 2 if (node->pn_kid != NULL) {
965     instrument_expression(node->pn_kid, f);
966     }
967 siliconforks 92 Stream_write_string(f, ";\n");
968 siliconforks 2 break;
969     case TOK_COLON:
970     assert(node->pn_arity == PN_NAME);
971     /*
972     This one is tricky: can't output instrumentation between the label and the
973     statement it's supposed to label ...
974     */
975 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
976 siliconforks 2 print_string_atom(node->pn_atom, f);
977 siliconforks 92 Stream_write_string(f, ":\n");
978 siliconforks 2 /*
979     ... use output_statement instead of instrument_statement.
980     */
981 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
982 siliconforks 2 break;
983 siliconforks 340 case TOK_LEXICALSCOPE:
984     /* let statement */
985     assert(node->pn_arity == PN_NAME);
986     switch (node->pn_expr->pn_type) {
987     case TOK_LET:
988     /* let statement */
989     assert(node->pn_expr->pn_arity == PN_BINARY);
990     instrument_statement(node->pn_expr, f, indent, false);
991     break;
992     case TOK_LC:
993     /* block */
994     Stream_printf(f, "%*s", indent, "");
995     Stream_write_string(f, "{\n");
996     instrument_statement(node->pn_expr, f, indent + 2, false);
997     Stream_printf(f, "%*s", indent, "");
998     Stream_write_string(f, "}\n");
999     break;
1000     case TOK_FOR:
1001     instrument_statement(node->pn_expr, f, indent, false);
1002     break;
1003     default:
1004     abort();
1005     break;
1006     }
1007     break;
1008     case TOK_LET:
1009     switch (node->pn_arity) {
1010     case PN_BINARY:
1011     /* let statement */
1012     Stream_printf(f, "%*s", indent, "");
1013     Stream_write_string(f, "let (");
1014     assert(node->pn_left->pn_type == TOK_LP);
1015     assert(node->pn_left->pn_arity == PN_LIST);
1016     instrument_declarations(node->pn_left, f);
1017     Stream_write_string(f, ") {\n");
1018     instrument_statement(node->pn_right, f, indent + 2, false);
1019     Stream_printf(f, "%*s", indent, "");
1020     Stream_write_string(f, "}\n");
1021     break;
1022     case PN_LIST:
1023     /* let definition */
1024     instrument_let_definition(node, f, indent);
1025     Stream_write_string(f, ";\n");
1026     break;
1027     default:
1028     abort();
1029     break;
1030     }
1031     break;
1032 siliconforks 2 default:
1033     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1034     }
1035     }
1036    
1037     /*
1038     See <Statements> in jsparse.h.
1039     TOK_FUNCTION is handled as a statement and as an expression.
1040     TOK_EXPORT, TOK_IMPORT are not handled.
1041     */
1042 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1043 siliconforks 340 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1044 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
1045     if (line > num_lines) {
1046     fatal("%s: script contains more than 65,535 lines", file_id);
1047     }
1048    
1049 siliconforks 2 /* the root node has line number 0 */
1050     if (line != 0) {
1051 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1052     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1053 siliconforks 2 lines[line - 1] = 1;
1054     }
1055     }
1056 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
1057 siliconforks 2 }
1058    
1059 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1060     const jschar * characters_end = characters + line_end;
1061     const jschar * cp = characters + line_start;
1062     const char * bp = prefix;
1063     for (;;) {
1064     if (*bp == '\0') {
1065     return true;
1066     }
1067     else if (cp == characters_end) {
1068     return false;
1069     }
1070     else if (*cp != *bp) {
1071     return false;
1072     }
1073     bp++;
1074     cp++;
1075     }
1076     }
1077    
1078 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1079     /* XXX - other Unicode space */
1080     const jschar * end = characters + line_end;
1081     for (const jschar * p = characters + line_start; p < end; p++) {
1082     jschar c = *p;
1083     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1084     continue;
1085     }
1086     else {
1087     return false;
1088     }
1089     }
1090     return true;
1091     }
1092    
1093 siliconforks 284 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1094     fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1095     }
1096    
1097 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1098 siliconforks 2 file_id = id;
1099    
1100 siliconforks 336 /* parse the javascript */
1101     JSParseContext parse_context;
1102     if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1103 siliconforks 2 fatal("cannot create token stream from file: %s", file_id);
1104     }
1105 siliconforks 284 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1106 siliconforks 336 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1107 siliconforks 2 if (node == NULL) {
1108 siliconforks 284 js_ReportUncaughtException(context);
1109 siliconforks 2 fatal("parse error in file: %s", file_id);
1110     }
1111 siliconforks 284 JS_SetErrorReporter(context, old_error_reporter);
1112 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1113 siliconforks 2 lines = xmalloc(num_lines);
1114 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1115 siliconforks 2 lines[i] = 0;
1116     }
1117    
1118 siliconforks 240 /* search code for conditionals */
1119     exclusive_directives = xnew(bool, num_lines);
1120     for (unsigned int i = 0; i < num_lines; i++) {
1121     exclusive_directives[i] = false;
1122 siliconforks 2 }
1123    
1124 siliconforks 157 bool has_conditionals = false;
1125 siliconforks 240 struct IfDirective * if_directives = NULL;
1126 siliconforks 157 size_t line_number = 0;
1127     size_t i = 0;
1128 siliconforks 176 while (i < num_characters) {
1129 siliconforks 240 if (line_number == UINT16_MAX) {
1130     fatal("%s: script has more than 65,535 lines", file_id);
1131     }
1132 siliconforks 157 line_number++;
1133     size_t line_start = i;
1134 siliconforks 190 jschar c;
1135     bool done = false;
1136     while (! done && i < num_characters) {
1137     c = characters[i];
1138     switch (c) {
1139     case '\r':
1140     case '\n':
1141     case 0x2028:
1142     case 0x2029:
1143     done = true;
1144     break;
1145     default:
1146     i++;
1147     }
1148 siliconforks 157 }
1149     size_t line_end = i;
1150 siliconforks 176 if (i < num_characters) {
1151 siliconforks 190 i++;
1152     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1153 siliconforks 157 i++;
1154     }
1155     }
1156 siliconforks 240
1157 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1158 siliconforks 240 has_conditionals = true;
1159    
1160     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1161     exclusive_directives[line_number - 1] = true;
1162 siliconforks 157 }
1163 siliconforks 240 else {
1164     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1165     if_directive->condition_start = characters + line_start + 16;
1166     if_directive->condition_end = characters + line_end;
1167     if_directive->start_line = line_number;
1168     if_directive->end_line = 0;
1169     if_directive->next = if_directives;
1170     if_directives = if_directive;
1171 siliconforks 190 }
1172 siliconforks 157 }
1173 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1174 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1175     if (p->end_line == 0) {
1176     p->end_line = line_number;
1177     break;
1178     }
1179     }
1180 siliconforks 157 }
1181     }
1182    
1183 siliconforks 240 /*
1184     An instrumented JavaScript file has 4 sections:
1185     1. initialization
1186     2. instrumented source code
1187     3. conditionals
1188     4. original source code
1189     */
1190    
1191     Stream * instrumented = Stream_new(0);
1192     instrument_statement(node, instrumented, 0, false);
1193 siliconforks 336 js_FinishParseContext(context, &parse_context);
1194 siliconforks 240
1195     /* write line number info to the output */
1196     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1197     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1198     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1199     Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1200     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1201     for (int i = 0; i < num_lines; i++) {
1202     if (lines[i]) {
1203     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1204     }
1205     }
1206     Stream_write_string(output, "}\n");
1207     free(lines);
1208     lines = NULL;
1209     free(exclusive_directives);
1210     exclusive_directives = NULL;
1211    
1212     /* conditionals */
1213     if (has_conditionals) {
1214     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1215     }
1216    
1217     /* copy the instrumented source code to the output */
1218     Stream_write(output, instrumented->data, instrumented->length);
1219    
1220     /* conditionals */
1221     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1222     Stream_write_string(output, "if (!(");
1223 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1224 siliconforks 240 Stream_write_string(output, ")) {\n");
1225     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1226     Stream_write_string(output, "}\n");
1227     }
1228    
1229     /* free */
1230     while (if_directives != NULL) {
1231     struct IfDirective * if_directive = if_directives;
1232     if_directives = if_directives->next;
1233     free(if_directive);
1234     }
1235    
1236 siliconforks 95 /* copy the original source to the output */
1237 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1238     jscoverage_write_source(id, characters, num_characters, output);
1239     Stream_printf(output, ";\n");
1240 siliconforks 95
1241 siliconforks 179 Stream_delete(instrumented);
1242    
1243     file_id = NULL;
1244     }
1245    
1246     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1247     Stream_write_string(output, "[");
1248     if (jscoverage_highlight) {
1249     Stream * highlighted_stream = Stream_new(num_characters);
1250     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1251     size_t i = 0;
1252     while (i < highlighted_stream->length) {
1253     if (i > 0) {
1254     Stream_write_char(output, ',');
1255     }
1256    
1257     Stream_write_char(output, '"');
1258     bool done = false;
1259     while (! done) {
1260     char c = highlighted_stream->data[i];
1261     switch (c) {
1262     case 0x8:
1263     /* backspace */
1264     Stream_write_string(output, "\\b");
1265     break;
1266     case 0x9:
1267     /* horizontal tab */
1268     Stream_write_string(output, "\\t");
1269     break;
1270     case 0xa:
1271     /* line feed (new line) */
1272     done = true;
1273     break;
1274 siliconforks 317 /* IE doesn't support this */
1275     /*
1276 siliconforks 179 case 0xb:
1277     Stream_write_string(output, "\\v");
1278     break;
1279 siliconforks 317 */
1280 siliconforks 179 case 0xc:
1281     /* form feed */
1282     Stream_write_string(output, "\\f");
1283     break;
1284     case 0xd:
1285     /* carriage return */
1286     done = true;
1287     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1288     i++;
1289     }
1290     break;
1291     case '"':
1292     Stream_write_string(output, "\\\"");
1293     break;
1294     case '\\':
1295     Stream_write_string(output, "\\\\");
1296     break;
1297     default:
1298     Stream_write_char(output, c);
1299     break;
1300     }
1301 siliconforks 95 i++;
1302 siliconforks 179 if (i >= highlighted_stream->length) {
1303     done = true;
1304 siliconforks 95 }
1305     }
1306 siliconforks 179 Stream_write_char(output, '"');
1307     }
1308     Stream_delete(highlighted_stream);
1309     }
1310     else {
1311     size_t i = 0;
1312     while (i < num_characters) {
1313     if (i > 0) {
1314     Stream_write_char(output, ',');
1315     }
1316    
1317     Stream_write_char(output, '"');
1318     bool done = false;
1319     while (! done) {
1320     jschar c = characters[i];
1321     switch (c) {
1322     case 0x8:
1323     /* backspace */
1324     Stream_write_string(output, "\\b");
1325     break;
1326     case 0x9:
1327     /* horizontal tab */
1328     Stream_write_string(output, "\\t");
1329     break;
1330     case 0xa:
1331     /* line feed (new line) */
1332     done = true;
1333     break;
1334 siliconforks 317 /* IE doesn't support this */
1335     /*
1336 siliconforks 179 case 0xb:
1337     Stream_write_string(output, "\\v");
1338     break;
1339 siliconforks 317 */
1340 siliconforks 179 case 0xc:
1341     /* form feed */
1342     Stream_write_string(output, "\\f");
1343     break;
1344     case 0xd:
1345     /* carriage return */
1346     done = true;
1347     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1348     i++;
1349     }
1350     break;
1351     case '"':
1352     Stream_write_string(output, "\\\"");
1353     break;
1354     case '\\':
1355     Stream_write_string(output, "\\\\");
1356     break;
1357     case '&':
1358     Stream_write_string(output, "&amp;");
1359     break;
1360     case '<':
1361     Stream_write_string(output, "&lt;");
1362     break;
1363     case '>':
1364     Stream_write_string(output, "&gt;");
1365     break;
1366     case 0x2028:
1367     case 0x2029:
1368     done = true;
1369     break;
1370     default:
1371     if (32 <= c && c <= 126) {
1372     Stream_write_char(output, c);
1373     }
1374     else {
1375     Stream_printf(output, "&#%d;", c);
1376     }
1377     break;
1378     }
1379 siliconforks 95 i++;
1380 siliconforks 179 if (i >= num_characters) {
1381     done = true;
1382     }
1383 siliconforks 95 }
1384 siliconforks 179 Stream_write_char(output, '"');
1385 siliconforks 95 }
1386     }
1387 siliconforks 179 Stream_write_string(output, "]");
1388 siliconforks 2 }
1389 siliconforks 116
1390     void jscoverage_copy_resources(const char * destination_directory) {
1391     copy_resource("jscoverage.html", destination_directory);
1392     copy_resource("jscoverage.css", destination_directory);
1393     copy_resource("jscoverage.js", destination_directory);
1394 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1395 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1396 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1397 siliconforks 116 }
1398    
1399     /*
1400     coverage reports
1401     */
1402    
1403     struct FileCoverageList {
1404     FileCoverage * file_coverage;
1405     struct FileCoverageList * next;
1406     };
1407    
1408     struct Coverage {
1409     JSHashTable * coverage_table;
1410     struct FileCoverageList * coverage_list;
1411     };
1412    
1413     static int compare_strings(const void * p1, const void * p2) {
1414     return strcmp(p1, p2) == 0;
1415     }
1416    
1417     Coverage * Coverage_new(void) {
1418     Coverage * result = xmalloc(sizeof(Coverage));
1419     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1420     if (result->coverage_table == NULL) {
1421     fatal("cannot create hash table");
1422     }
1423     result->coverage_list = NULL;
1424     return result;
1425     }
1426    
1427     void Coverage_delete(Coverage * coverage) {
1428     JS_HashTableDestroy(coverage->coverage_table);
1429     struct FileCoverageList * p = coverage->coverage_list;
1430     while (p != NULL) {
1431 siliconforks 179 free(p->file_coverage->coverage_lines);
1432     if (p->file_coverage->source_lines != NULL) {
1433     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1434     free(p->file_coverage->source_lines[i]);
1435     }
1436     free(p->file_coverage->source_lines);
1437     }
1438 siliconforks 116 free(p->file_coverage->id);
1439     free(p->file_coverage);
1440     struct FileCoverageList * q = p;
1441     p = p->next;
1442     free(q);
1443     }
1444     free(coverage);
1445     }
1446    
1447     struct EnumeratorArg {
1448     CoverageForeachFunction f;
1449     void * p;
1450     };
1451    
1452     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1453     struct EnumeratorArg * enumerator_arg = arg;
1454     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1455     return 0;
1456     }
1457    
1458     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1459     struct EnumeratorArg enumerator_arg;
1460     enumerator_arg.f = f;
1461     enumerator_arg.p = p;
1462     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1463     }
1464    
1465     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1466 siliconforks 336 int result = 0;
1467    
1468 siliconforks 116 jschar * base = js_InflateString(context, (char *) json, &length);
1469     if (base == NULL) {
1470     fatal("out of memory");
1471     }
1472    
1473     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1474     parenthesized_json[0] = '(';
1475     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1476     parenthesized_json[length + 1] = ')';
1477    
1478     JS_free(context, base);
1479    
1480 siliconforks 336 JSParseContext parse_context;
1481     if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1482     free(parenthesized_json);
1483     return -1;
1484 siliconforks 116 }
1485 siliconforks 336 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1486 siliconforks 116 free(parenthesized_json);
1487     if (root == NULL) {
1488 siliconforks 336 result = -1;
1489     goto done;
1490 siliconforks 116 }
1491    
1492     /* root node must be TOK_LC */
1493     if (root->pn_type != TOK_LC) {
1494 siliconforks 336 result = -1;
1495     goto done;
1496 siliconforks 116 }
1497     JSParseNode * semi = root->pn_u.list.head;
1498    
1499     /* the list must be TOK_SEMI and it must contain only one element */
1500     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1501 siliconforks 336 result = -1;
1502     goto done;
1503 siliconforks 116 }
1504     JSParseNode * parenthesized = semi->pn_kid;
1505    
1506     /* this must be a parenthesized expression */
1507     if (parenthesized->pn_type != TOK_RP) {
1508 siliconforks 336 result = -1;
1509     goto done;
1510 siliconforks 116 }
1511     JSParseNode * object = parenthesized->pn_kid;
1512    
1513     /* this must be an object literal */
1514     if (object->pn_type != TOK_RC) {
1515 siliconforks 336 result = -1;
1516     goto done;
1517 siliconforks 116 }
1518    
1519     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1520     /* every element of this list must be TOK_COLON */
1521     if (p->pn_type != TOK_COLON) {
1522 siliconforks 336 result = -1;
1523     goto done;
1524 siliconforks 116 }
1525    
1526     /* the key must be a string representing the file */
1527     JSParseNode * key = p->pn_left;
1528     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1529 siliconforks 336 result = -1;
1530     goto done;
1531 siliconforks 116 }
1532     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1533    
1534     /* the value must be an object literal OR an array */
1535     JSParseNode * value = p->pn_right;
1536     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1537 siliconforks 336 result = -1;
1538     goto done;
1539 siliconforks 116 }
1540    
1541     JSParseNode * array = NULL;
1542     JSParseNode * source = NULL;
1543     if (value->pn_type == TOK_RB) {
1544     /* an array */
1545     array = value;
1546     }
1547     else if (value->pn_type == TOK_RC) {
1548     /* an object literal */
1549     if (value->pn_count != 2) {
1550 siliconforks 336 result = -1;
1551     goto done;
1552 siliconforks 116 }
1553     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1554     if (element->pn_type != TOK_COLON) {
1555 siliconforks 336 result = -1;
1556     goto done;
1557 siliconforks 116 }
1558     JSParseNode * left = element->pn_left;
1559     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1560 siliconforks 336 result = -1;
1561     goto done;
1562 siliconforks 116 }
1563     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1564     if (strcmp(s, "coverage") == 0) {
1565     array = element->pn_right;
1566     if (array->pn_type != TOK_RB) {
1567 siliconforks 336 result = -1;
1568     goto done;
1569 siliconforks 116 }
1570     }
1571     else if (strcmp(s, "source") == 0) {
1572     source = element->pn_right;
1573 siliconforks 179 if (source->pn_type != TOK_RB) {
1574 siliconforks 336 result = -1;
1575     goto done;
1576 siliconforks 116 }
1577     }
1578     else {
1579 siliconforks 336 result = -1;
1580     goto done;
1581 siliconforks 116 }
1582     }
1583     }
1584     else {
1585 siliconforks 336 result = -1;
1586     goto done;
1587 siliconforks 116 }
1588    
1589     if (array == NULL) {
1590 siliconforks 336 result = -1;
1591     goto done;
1592 siliconforks 116 }
1593    
1594     /* look up the file in the coverage table */
1595     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1596     if (file_coverage == NULL) {
1597     /* not there: create a new one */
1598     char * id = xstrdup(id_bytes);
1599     file_coverage = xmalloc(sizeof(FileCoverage));
1600     file_coverage->id = id;
1601 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1602     file_coverage->coverage_lines = xnew(int, array->pn_count);
1603 siliconforks 245 file_coverage->source_lines = NULL;
1604 siliconforks 116
1605     /* set coverage for all lines */
1606     uint32 i = 0;
1607     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1608     if (element->pn_type == TOK_NUMBER) {
1609 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1610 siliconforks 116 }
1611     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1612 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1613 siliconforks 116 }
1614     else {
1615 siliconforks 336 result = -1;
1616     goto done;
1617 siliconforks 116 }
1618     }
1619     assert(i == array->pn_count);
1620    
1621     /* add to the hash table */
1622     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1623     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1624     coverage_list->file_coverage = file_coverage;
1625     coverage_list->next = coverage->coverage_list;
1626     coverage->coverage_list = coverage_list;
1627     }
1628     else {
1629     /* sanity check */
1630     assert(strcmp(file_coverage->id, id_bytes) == 0);
1631 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1632 siliconforks 336 result = -2;
1633     goto done;
1634 siliconforks 116 }
1635    
1636     /* merge the coverage */
1637     uint32 i = 0;
1638     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1639     if (element->pn_type == TOK_NUMBER) {
1640 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1641 siliconforks 336 result = -2;
1642     goto done;
1643 siliconforks 116 }
1644 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1645 siliconforks 116 }
1646     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1647 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1648 siliconforks 336 result = -2;
1649     goto done;
1650 siliconforks 116 }
1651     }
1652     else {
1653 siliconforks 336 result = -1;
1654     goto done;
1655 siliconforks 116 }
1656     }
1657     assert(i == array->pn_count);
1658 siliconforks 245 }
1659 siliconforks 116
1660 siliconforks 245 /* if this JSON file has source, use it */
1661     if (file_coverage->source_lines == NULL && source != NULL) {
1662     file_coverage->num_source_lines = source->pn_count;
1663     file_coverage->source_lines = xnew(char *, source->pn_count);
1664     uint32 i = 0;
1665     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1666     if (element->pn_type != TOK_STRING) {
1667 siliconforks 336 result = -1;
1668     goto done;
1669 siliconforks 179 }
1670 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1671 siliconforks 116 }
1672 siliconforks 245 assert(i == source->pn_count);
1673 siliconforks 116 }
1674     }
1675    
1676 siliconforks 336 done:
1677     js_FinishParseContext(context, &parse_context);
1678     return result;
1679 siliconforks 116 }

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