/[jscoverage]/trunk/instrument-js.c
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Revision 343 - (hide annotations)
Fri Oct 24 16:15:25 2008 UTC (11 years ago) by siliconforks
File MIME type: text/plain
File size: 49037 byte(s)
Add support for array comprehensions from 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 343 static void output_for_in(JSParseNode * node, Stream * f) {
356     assert(node->pn_type == TOK_FOR);
357     assert(node->pn_arity == PN_BINARY);
358     Stream_write_string(f, "for ");
359     if (node->pn_iflags & JSITER_FOREACH) {
360     Stream_write_string(f, "each ");
361     }
362     Stream_write_char(f, '(');
363     instrument_expression(node->pn_left, f);
364     Stream_write_char(f, ')');
365     }
366    
367 siliconforks 2 /*
368     See <Expressions> in jsparse.h.
369     TOK_FUNCTION is handled as a statement and as an expression.
370     TOK_DBLDOT is not handled (XML op).
371     TOK_DEFSHARP and TOK_USESHARP are not handled.
372     TOK_ANYNAME is not handled (XML op).
373     TOK_AT is not handled (XML op).
374     TOK_DBLCOLON is not handled.
375     TOK_XML* are not handled.
376     There seem to be some undocumented expressions:
377     TOK_INSTANCEOF binary
378     TOK_IN binary
379     */
380 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
381 siliconforks 2 switch (node->pn_type) {
382     case TOK_FUNCTION:
383 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
384 siliconforks 2 break;
385     case TOK_COMMA:
386     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
387     if (p != node->pn_head) {
388 siliconforks 92 Stream_write_string(f, ", ");
389 siliconforks 2 }
390     instrument_expression(p, f);
391     }
392     break;
393     case TOK_ASSIGN:
394     instrument_expression(node->pn_left, f);
395 siliconforks 92 Stream_write_char(f, ' ');
396 siliconforks 2 switch (node->pn_op) {
397     case JSOP_ADD:
398     case JSOP_SUB:
399     case JSOP_MUL:
400     case JSOP_MOD:
401     case JSOP_LSH:
402     case JSOP_RSH:
403     case JSOP_URSH:
404     case JSOP_BITAND:
405     case JSOP_BITOR:
406     case JSOP_BITXOR:
407     case JSOP_DIV:
408 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
409 siliconforks 2 break;
410     default:
411     /* do nothing - it must be a simple assignment */
412     break;
413     }
414 siliconforks 92 Stream_write_string(f, "= ");
415 siliconforks 2 instrument_expression(node->pn_right, f);
416     break;
417     case TOK_HOOK:
418     instrument_expression(node->pn_kid1, f);
419 siliconforks 92 Stream_write_string(f, "? ");
420 siliconforks 2 instrument_expression(node->pn_kid2, f);
421 siliconforks 92 Stream_write_string(f, ": ");
422 siliconforks 2 instrument_expression(node->pn_kid3, f);
423     break;
424     case TOK_OR:
425     case TOK_AND:
426     case TOK_BITOR:
427     case TOK_BITXOR:
428     case TOK_BITAND:
429     case TOK_EQOP:
430     case TOK_RELOP:
431     case TOK_SHOP:
432     case TOK_PLUS:
433     case TOK_MINUS:
434     case TOK_STAR:
435     case TOK_DIVOP:
436     switch (node->pn_arity) {
437     case PN_BINARY:
438     instrument_expression(node->pn_left, f);
439 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
440 siliconforks 2 instrument_expression(node->pn_right, f);
441     break;
442     case PN_LIST:
443     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
444     if (p != node->pn_head) {
445 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
446 siliconforks 2 }
447     instrument_expression(p, f);
448     }
449     break;
450     default:
451     abort();
452     }
453     break;
454     case TOK_UNARYOP:
455     switch (node->pn_op) {
456     case JSOP_NEG:
457 siliconforks 92 Stream_write_char(f, '-');
458 siliconforks 2 instrument_expression(node->pn_kid, f);
459     break;
460     case JSOP_POS:
461 siliconforks 92 Stream_write_char(f, '+');
462 siliconforks 2 instrument_expression(node->pn_kid, f);
463     break;
464     case JSOP_NOT:
465 siliconforks 92 Stream_write_char(f, '!');
466 siliconforks 2 instrument_expression(node->pn_kid, f);
467     break;
468     case JSOP_BITNOT:
469 siliconforks 92 Stream_write_char(f, '~');
470 siliconforks 2 instrument_expression(node->pn_kid, f);
471     break;
472     case JSOP_TYPEOF:
473 siliconforks 92 Stream_write_string(f, "typeof ");
474 siliconforks 2 instrument_expression(node->pn_kid, f);
475     break;
476     case JSOP_VOID:
477 siliconforks 92 Stream_write_string(f, "void ");
478 siliconforks 2 instrument_expression(node->pn_kid, f);
479     break;
480     default:
481     abort();
482     break;
483     }
484     break;
485     case TOK_INC:
486     case TOK_DEC:
487     /*
488     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
489     */
490     switch (node->pn_op) {
491     case JSOP_INCNAME:
492     case JSOP_INCPROP:
493     case JSOP_INCELEM:
494 siliconforks 92 Stream_write_string(f, "++");
495 siliconforks 2 instrument_expression(node->pn_kid, f);
496     break;
497     case JSOP_DECNAME:
498     case JSOP_DECPROP:
499     case JSOP_DECELEM:
500 siliconforks 92 Stream_write_string(f, "--");
501 siliconforks 2 instrument_expression(node->pn_kid, f);
502     break;
503     case JSOP_NAMEINC:
504     case JSOP_PROPINC:
505     case JSOP_ELEMINC:
506     instrument_expression(node->pn_kid, f);
507 siliconforks 92 Stream_write_string(f, "++");
508 siliconforks 2 break;
509     case JSOP_NAMEDEC:
510     case JSOP_PROPDEC:
511     case JSOP_ELEMDEC:
512     instrument_expression(node->pn_kid, f);
513 siliconforks 92 Stream_write_string(f, "--");
514 siliconforks 2 break;
515     default:
516     abort();
517     break;
518     }
519     break;
520     case TOK_NEW:
521 siliconforks 92 Stream_write_string(f, "new ");
522 siliconforks 2 instrument_function_call(node, f);
523     break;
524     case TOK_DELETE:
525 siliconforks 92 Stream_write_string(f, "delete ");
526 siliconforks 2 instrument_expression(node->pn_kid, f);
527     break;
528     case TOK_DOT:
529     /*
530     This may have originally been x['foo-bar']. Because the string 'foo-bar'
531     contains illegal characters, we have to use the subscript syntax instead of
532     the dot syntax.
533     */
534     instrument_expression(node->pn_expr, f);
535 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
536     {
537     JSString * s = ATOM_TO_STRING(node->pn_atom);
538 siliconforks 336 bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);
539     if (! is_keyword && js_IsIdentifier(s)) {
540 siliconforks 92 Stream_write_char(f, '.');
541 siliconforks 84 print_string_atom(node->pn_atom, f);
542     }
543     else {
544 siliconforks 92 Stream_write_char(f, '[');
545 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
546 siliconforks 92 Stream_write_char(f, ']');
547 siliconforks 84 }
548     }
549 siliconforks 2 break;
550     case TOK_LB:
551     instrument_expression(node->pn_left, f);
552 siliconforks 92 Stream_write_char(f, '[');
553 siliconforks 2 instrument_expression(node->pn_right, f);
554 siliconforks 92 Stream_write_char(f, ']');
555 siliconforks 2 break;
556     case TOK_LP:
557     instrument_function_call(node, f);
558     break;
559     case TOK_RB:
560 siliconforks 92 Stream_write_char(f, '[');
561 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
562     if (p != node->pn_head) {
563 siliconforks 92 Stream_write_string(f, ", ");
564 siliconforks 2 }
565     /* TOK_COMMA is a special case: a hole in the array */
566     if (p->pn_type != TOK_COMMA) {
567     instrument_expression(p, f);
568     }
569     }
570     if (node->pn_extra == PNX_ENDCOMMA) {
571 siliconforks 92 Stream_write_char(f, ',');
572 siliconforks 2 }
573 siliconforks 92 Stream_write_char(f, ']');
574 siliconforks 2 break;
575     case TOK_RC:
576 siliconforks 92 Stream_write_char(f, '{');
577 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
578     assert(p->pn_type == TOK_COLON);
579     if (p != node->pn_head) {
580 siliconforks 92 Stream_write_string(f, ", ");
581 siliconforks 2 }
582 siliconforks 155
583     /* check whether this is a getter or setter */
584     switch (p->pn_op) {
585     case JSOP_GETTER:
586     case JSOP_SETTER:
587 siliconforks 293 if (p->pn_op == JSOP_GETTER) {
588     Stream_write_string(f, "get ");
589     }
590     else {
591     Stream_write_string(f, "set ");
592     }
593 siliconforks 155 instrument_expression(p->pn_left, f);
594 siliconforks 293 if (p->pn_right->pn_type != TOK_FUNCTION) {
595     fatal("parse error: expected function");
596     }
597 siliconforks 155 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
598     break;
599     default:
600     instrument_expression(p->pn_left, f);
601     Stream_write_string(f, ": ");
602     instrument_expression(p->pn_right, f);
603     break;
604     }
605 siliconforks 2 }
606 siliconforks 92 Stream_write_char(f, '}');
607 siliconforks 2 break;
608     case TOK_RP:
609 siliconforks 92 Stream_write_char(f, '(');
610 siliconforks 2 instrument_expression(node->pn_kid, f);
611 siliconforks 92 Stream_write_char(f, ')');
612 siliconforks 2 break;
613     case TOK_NAME:
614     print_string_atom(node->pn_atom, f);
615     break;
616     case TOK_STRING:
617     print_quoted_string_atom(node->pn_atom, f);
618     break;
619 siliconforks 336 case TOK_REGEXP:
620     assert(node->pn_op == JSOP_REGEXP);
621     {
622     JSObject * object = node->pn_pob->object;
623     jsval result;
624     js_regexp_toString(context, object, &result);
625     print_regex(result, f);
626 siliconforks 2 }
627     break;
628     case TOK_NUMBER:
629     /*
630     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
631     2^(-52) = 2.22 x 10^(-16)
632     Thus there are 16 significant digits.
633     To keep the output simple, special-case zero.
634     */
635     if (node->pn_dval == 0.0) {
636 siliconforks 92 Stream_write_string(f, "0");
637 siliconforks 2 }
638     else {
639 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
640 siliconforks 2 }
641     break;
642     case TOK_PRIMARY:
643     switch (node->pn_op) {
644     case JSOP_TRUE:
645 siliconforks 92 Stream_write_string(f, "true");
646 siliconforks 2 break;
647     case JSOP_FALSE:
648 siliconforks 92 Stream_write_string(f, "false");
649 siliconforks 2 break;
650     case JSOP_NULL:
651 siliconforks 92 Stream_write_string(f, "null");
652 siliconforks 2 break;
653     case JSOP_THIS:
654 siliconforks 92 Stream_write_string(f, "this");
655 siliconforks 2 break;
656     /* jsscan.h mentions `super' ??? */
657     default:
658     abort();
659     }
660     break;
661     case TOK_INSTANCEOF:
662     instrument_expression(node->pn_left, f);
663 siliconforks 92 Stream_write_string(f, " instanceof ");
664 siliconforks 2 instrument_expression(node->pn_right, f);
665     break;
666     case TOK_IN:
667     instrument_expression(node->pn_left, f);
668 siliconforks 92 Stream_write_string(f, " in ");
669 siliconforks 2 instrument_expression(node->pn_right, f);
670     break;
671 siliconforks 340 case TOK_LEXICALSCOPE:
672     assert(node->pn_arity == PN_NAME);
673     assert(node->pn_expr->pn_type == TOK_LET);
674     assert(node->pn_expr->pn_arity == PN_BINARY);
675     Stream_write_string(f, "let(");
676     assert(node->pn_expr->pn_left->pn_type == TOK_LP);
677     assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
678     instrument_declarations(node->pn_expr->pn_left, f);
679     Stream_write_string(f, ") ");
680     instrument_expression(node->pn_expr->pn_right, f);
681     break;
682 siliconforks 342 case TOK_YIELD:
683     assert(node->pn_arity == PN_UNARY);
684     Stream_write_string(f, "yield ");
685     instrument_expression(node->pn_kid, f);
686     break;
687 siliconforks 343 case TOK_ARRAYCOMP:
688     assert(node->pn_arity == PN_LIST);
689     {
690     JSParseNode * block_node;
691     switch (node->pn_count) {
692     case 1:
693     block_node = node->pn_head;
694     break;
695     case 2:
696     block_node = node->pn_head->pn_next;
697     break;
698     default:
699     abort();
700     break;
701     }
702     assert(block_node->pn_type == TOK_LEXICALSCOPE);
703     assert(block_node->pn_arity == PN_NAME);
704     JSParseNode * for_node = block_node->pn_expr;
705     assert(for_node->pn_type == TOK_FOR);
706     assert(for_node->pn_arity == PN_BINARY);
707     JSParseNode * push_node;
708     JSParseNode * if_node = NULL;
709     switch (for_node->pn_right->pn_type) {
710     case TOK_ARRAYPUSH:
711     push_node = for_node->pn_right;
712     assert(push_node->pn_arity == PN_UNARY);
713     break;
714     case TOK_IF:
715     if_node = for_node->pn_right;
716     assert(if_node->pn_arity == PN_TERNARY);
717     push_node = if_node->pn_kid2;
718     break;
719     default:
720     abort();
721     break;
722     }
723     Stream_write_char(f, '[');
724     instrument_expression(push_node->pn_kid, f);
725     Stream_write_char(f, ' ');
726     output_for_in(for_node, f);
727     if (if_node) {
728     Stream_write_string(f, " if (");
729     instrument_expression(if_node->pn_kid1, f);
730     Stream_write_char(f, ')');
731     }
732     Stream_write_char(f, ']');
733     }
734     break;
735     case TOK_VAR:
736     assert(node->pn_arity == PN_LIST);
737     Stream_write_string(f, "var ");
738     instrument_declarations(node, f);
739     break;
740     case TOK_LET:
741     assert(node->pn_arity == PN_LIST);
742     Stream_write_string(f, "let ");
743     instrument_declarations(node, f);
744     break;
745 siliconforks 2 default:
746     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
747     }
748     }
749    
750 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
751 siliconforks 2 switch (node->pn_type) {
752     case TOK_FUNCTION:
753 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
754 siliconforks 2 break;
755     case TOK_LC:
756     assert(node->pn_arity == PN_LIST);
757     /*
758 siliconforks 92 Stream_write_string(f, "{\n");
759 siliconforks 2 */
760     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
761 siliconforks 240 instrument_statement(p, f, indent, false);
762 siliconforks 2 }
763     /*
764 siliconforks 92 Stream_printf(f, "%*s", indent, "");
765     Stream_write_string(f, "}\n");
766 siliconforks 2 */
767     break;
768     case TOK_IF:
769 siliconforks 240 {
770 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
771 siliconforks 240
772     uint16_t line = node->pn_pos.begin.lineno;
773     if (! is_jscoverage_if) {
774     if (line > num_lines) {
775     fatal("%s: script contains more than 65,535 lines", file_id);
776     }
777     if (line >= 2 && exclusive_directives[line - 2]) {
778     is_jscoverage_if = true;
779     }
780     }
781    
782 siliconforks 92 Stream_printf(f, "%*s", indent, "");
783     Stream_write_string(f, "if (");
784 siliconforks 2 instrument_expression(node->pn_kid1, f);
785 siliconforks 92 Stream_write_string(f, ") {\n");
786 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
787     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
788     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
789     Stream_printf(f, "%*s", indent + 2, "");
790     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
791     }
792     instrument_statement(node->pn_kid2, f, indent + 2, false);
793 siliconforks 92 Stream_printf(f, "%*s", indent, "");
794     Stream_write_string(f, "}\n");
795 siliconforks 240
796     if (node->pn_kid3 || is_jscoverage_if) {
797 siliconforks 92 Stream_printf(f, "%*s", indent, "");
798     Stream_write_string(f, "else {\n");
799 siliconforks 240
800     if (is_jscoverage_if) {
801     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
802     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
803     Stream_printf(f, "%*s", indent + 2, "");
804     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
805     }
806    
807     if (node->pn_kid3) {
808     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
809     }
810    
811 siliconforks 92 Stream_printf(f, "%*s", indent, "");
812     Stream_write_string(f, "}\n");
813 siliconforks 2 }
814 siliconforks 240
815 siliconforks 2 break;
816 siliconforks 240 }
817 siliconforks 2 case TOK_SWITCH:
818     assert(node->pn_arity == PN_BINARY);
819 siliconforks 92 Stream_printf(f, "%*s", indent, "");
820     Stream_write_string(f, "switch (");
821 siliconforks 2 instrument_expression(node->pn_left, f);
822 siliconforks 92 Stream_write_string(f, ") {\n");
823 siliconforks 2 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
824 siliconforks 92 Stream_printf(f, "%*s", indent, "");
825 siliconforks 2 switch (p->pn_type) {
826     case TOK_CASE:
827 siliconforks 92 Stream_write_string(f, "case ");
828 siliconforks 2 instrument_expression(p->pn_left, f);
829 siliconforks 92 Stream_write_string(f, ":\n");
830 siliconforks 2 break;
831     case TOK_DEFAULT:
832 siliconforks 92 Stream_write_string(f, "default:\n");
833 siliconforks 2 break;
834     default:
835     abort();
836     break;
837     }
838 siliconforks 240 instrument_statement(p->pn_right, f, indent + 2, false);
839 siliconforks 2 }
840 siliconforks 92 Stream_printf(f, "%*s", indent, "");
841     Stream_write_string(f, "}\n");
842 siliconforks 2 break;
843     case TOK_CASE:
844     case TOK_DEFAULT:
845     abort();
846     break;
847     case TOK_WHILE:
848     assert(node->pn_arity == PN_BINARY);
849 siliconforks 92 Stream_printf(f, "%*s", indent, "");
850     Stream_write_string(f, "while (");
851 siliconforks 2 instrument_expression(node->pn_left, f);
852 siliconforks 92 Stream_write_string(f, ") {\n");
853 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
854 siliconforks 92 Stream_write_string(f, "}\n");
855 siliconforks 2 break;
856     case TOK_DO:
857     assert(node->pn_arity == PN_BINARY);
858 siliconforks 92 Stream_printf(f, "%*s", indent, "");
859     Stream_write_string(f, "do {\n");
860 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
861 siliconforks 92 Stream_write_string(f, "}\n");
862     Stream_printf(f, "%*s", indent, "");
863     Stream_write_string(f, "while (");
864 siliconforks 2 instrument_expression(node->pn_right, f);
865 siliconforks 92 Stream_write_string(f, ");\n");
866 siliconforks 2 break;
867     case TOK_FOR:
868     assert(node->pn_arity == PN_BINARY);
869 siliconforks 92 Stream_printf(f, "%*s", indent, "");
870 siliconforks 2 switch (node->pn_left->pn_type) {
871     case TOK_IN:
872     /* for/in */
873     assert(node->pn_left->pn_arity == PN_BINARY);
874 siliconforks 343 output_for_in(node, f);
875 siliconforks 2 break;
876     case TOK_RESERVED:
877     /* for (;;) */
878     assert(node->pn_left->pn_arity == PN_TERNARY);
879 siliconforks 343 Stream_write_string(f, "for (");
880 siliconforks 2 if (node->pn_left->pn_kid1) {
881 siliconforks 343 instrument_expression(node->pn_left->pn_kid1, f);
882 siliconforks 2 }
883 siliconforks 92 Stream_write_string(f, ";");
884 siliconforks 2 if (node->pn_left->pn_kid2) {
885 siliconforks 92 Stream_write_char(f, ' ');
886 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
887     }
888 siliconforks 92 Stream_write_string(f, ";");
889 siliconforks 2 if (node->pn_left->pn_kid3) {
890 siliconforks 92 Stream_write_char(f, ' ');
891 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
892     }
893 siliconforks 343 Stream_write_char(f, ')');
894 siliconforks 2 break;
895     default:
896     abort();
897     break;
898     }
899 siliconforks 343 Stream_write_string(f, " {\n");
900 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
901 siliconforks 92 Stream_write_string(f, "}\n");
902 siliconforks 2 break;
903     case TOK_THROW:
904     assert(node->pn_arity == PN_UNARY);
905 siliconforks 92 Stream_printf(f, "%*s", indent, "");
906     Stream_write_string(f, "throw ");
907 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
908 siliconforks 92 Stream_write_string(f, ";\n");
909 siliconforks 2 break;
910     case TOK_TRY:
911 siliconforks 92 Stream_printf(f, "%*s", indent, "");
912     Stream_write_string(f, "try {\n");
913 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
914 siliconforks 92 Stream_printf(f, "%*s", indent, "");
915     Stream_write_string(f, "}\n");
916 siliconforks 336 if (node->pn_kid2) {
917     assert(node->pn_kid2->pn_type == TOK_RESERVED);
918     for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
919     assert(scope->pn_type == TOK_LEXICALSCOPE);
920     JSParseNode * catch = scope->pn_expr;
921 siliconforks 2 assert(catch->pn_type == TOK_CATCH);
922 siliconforks 92 Stream_printf(f, "%*s", indent, "");
923     Stream_write_string(f, "catch (");
924 siliconforks 341 /* this may not be a name - destructuring assignment */
925     /*
926 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
927     print_string_atom(catch->pn_kid1->pn_atom, f);
928 siliconforks 341 */
929     instrument_expression(catch->pn_kid1, f);
930 siliconforks 336 if (catch->pn_kid2) {
931 siliconforks 92 Stream_write_string(f, " if ");
932 siliconforks 336 instrument_expression(catch->pn_kid2, f);
933 siliconforks 2 }
934 siliconforks 92 Stream_write_string(f, ") {\n");
935 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
936 siliconforks 92 Stream_printf(f, "%*s", indent, "");
937     Stream_write_string(f, "}\n");
938 siliconforks 2 }
939     }
940     if (node->pn_kid3) {
941 siliconforks 92 Stream_printf(f, "%*s", indent, "");
942     Stream_write_string(f, "finally {\n");
943 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
944 siliconforks 92 Stream_printf(f, "%*s", indent, "");
945     Stream_write_string(f, "}\n");
946 siliconforks 2 }
947     break;
948     case TOK_CATCH:
949     abort();
950     break;
951     case TOK_BREAK:
952     case TOK_CONTINUE:
953     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
954 siliconforks 92 Stream_printf(f, "%*s", indent, "");
955     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
956 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
957     if (atom != NULL) {
958 siliconforks 92 Stream_write_char(f, ' ');
959 siliconforks 2 print_string_atom(node->pn_atom, f);
960     }
961 siliconforks 92 Stream_write_string(f, ";\n");
962 siliconforks 2 break;
963     case TOK_WITH:
964     assert(node->pn_arity == PN_BINARY);
965 siliconforks 92 Stream_printf(f, "%*s", indent, "");
966     Stream_write_string(f, "with (");
967 siliconforks 2 instrument_expression(node->pn_left, f);
968 siliconforks 92 Stream_write_string(f, ") {\n");
969 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
970 siliconforks 92 Stream_printf(f, "%*s", indent, "");
971     Stream_write_string(f, "}\n");
972 siliconforks 2 break;
973     case TOK_VAR:
974 siliconforks 343 Stream_printf(f, "%*s", indent, "");
975     instrument_expression(node, f);
976 siliconforks 92 Stream_write_string(f, ";\n");
977 siliconforks 2 break;
978     case TOK_RETURN:
979     assert(node->pn_arity == PN_UNARY);
980 siliconforks 92 Stream_printf(f, "%*s", indent, "");
981     Stream_write_string(f, "return");
982 siliconforks 2 if (node->pn_kid != NULL) {
983 siliconforks 92 Stream_write_char(f, ' ');
984 siliconforks 2 instrument_expression(node->pn_kid, f);
985     }
986 siliconforks 92 Stream_write_string(f, ";\n");
987 siliconforks 2 break;
988     case TOK_SEMI:
989     assert(node->pn_arity == PN_UNARY);
990 siliconforks 92 Stream_printf(f, "%*s", indent, "");
991 siliconforks 2 if (node->pn_kid != NULL) {
992     instrument_expression(node->pn_kid, f);
993     }
994 siliconforks 92 Stream_write_string(f, ";\n");
995 siliconforks 2 break;
996     case TOK_COLON:
997     assert(node->pn_arity == PN_NAME);
998     /*
999     This one is tricky: can't output instrumentation between the label and the
1000     statement it's supposed to label ...
1001     */
1002 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1003 siliconforks 2 print_string_atom(node->pn_atom, f);
1004 siliconforks 92 Stream_write_string(f, ":\n");
1005 siliconforks 2 /*
1006     ... use output_statement instead of instrument_statement.
1007     */
1008 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
1009 siliconforks 2 break;
1010 siliconforks 340 case TOK_LEXICALSCOPE:
1011     /* let statement */
1012     assert(node->pn_arity == PN_NAME);
1013     switch (node->pn_expr->pn_type) {
1014     case TOK_LET:
1015     /* let statement */
1016     assert(node->pn_expr->pn_arity == PN_BINARY);
1017     instrument_statement(node->pn_expr, f, indent, false);
1018     break;
1019     case TOK_LC:
1020     /* block */
1021     Stream_printf(f, "%*s", indent, "");
1022     Stream_write_string(f, "{\n");
1023     instrument_statement(node->pn_expr, f, indent + 2, false);
1024     Stream_printf(f, "%*s", indent, "");
1025     Stream_write_string(f, "}\n");
1026     break;
1027     case TOK_FOR:
1028     instrument_statement(node->pn_expr, f, indent, false);
1029     break;
1030     default:
1031     abort();
1032     break;
1033     }
1034     break;
1035     case TOK_LET:
1036     switch (node->pn_arity) {
1037     case PN_BINARY:
1038     /* let statement */
1039     Stream_printf(f, "%*s", indent, "");
1040     Stream_write_string(f, "let (");
1041     assert(node->pn_left->pn_type == TOK_LP);
1042     assert(node->pn_left->pn_arity == PN_LIST);
1043     instrument_declarations(node->pn_left, f);
1044     Stream_write_string(f, ") {\n");
1045     instrument_statement(node->pn_right, f, indent + 2, false);
1046     Stream_printf(f, "%*s", indent, "");
1047     Stream_write_string(f, "}\n");
1048     break;
1049     case PN_LIST:
1050     /* let definition */
1051 siliconforks 343 Stream_printf(f, "%*s", indent, "");
1052     instrument_expression(node, f);
1053 siliconforks 340 Stream_write_string(f, ";\n");
1054     break;
1055     default:
1056     abort();
1057     break;
1058     }
1059     break;
1060 siliconforks 2 default:
1061     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1062     }
1063     }
1064    
1065     /*
1066     See <Statements> in jsparse.h.
1067     TOK_FUNCTION is handled as a statement and as an expression.
1068     TOK_EXPORT, TOK_IMPORT are not handled.
1069     */
1070 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1071 siliconforks 340 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1072 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
1073     if (line > num_lines) {
1074     fatal("%s: script contains more than 65,535 lines", file_id);
1075     }
1076    
1077 siliconforks 2 /* the root node has line number 0 */
1078     if (line != 0) {
1079 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1080     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1081 siliconforks 2 lines[line - 1] = 1;
1082     }
1083     }
1084 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
1085 siliconforks 2 }
1086    
1087 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1088     const jschar * characters_end = characters + line_end;
1089     const jschar * cp = characters + line_start;
1090     const char * bp = prefix;
1091     for (;;) {
1092     if (*bp == '\0') {
1093     return true;
1094     }
1095     else if (cp == characters_end) {
1096     return false;
1097     }
1098     else if (*cp != *bp) {
1099     return false;
1100     }
1101     bp++;
1102     cp++;
1103     }
1104     }
1105    
1106 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1107     /* XXX - other Unicode space */
1108     const jschar * end = characters + line_end;
1109     for (const jschar * p = characters + line_start; p < end; p++) {
1110     jschar c = *p;
1111     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1112     continue;
1113     }
1114     else {
1115     return false;
1116     }
1117     }
1118     return true;
1119     }
1120    
1121 siliconforks 284 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1122     fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1123     }
1124    
1125 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1126 siliconforks 2 file_id = id;
1127    
1128 siliconforks 336 /* parse the javascript */
1129     JSParseContext parse_context;
1130     if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1131 siliconforks 2 fatal("cannot create token stream from file: %s", file_id);
1132     }
1133 siliconforks 284 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1134 siliconforks 336 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1135 siliconforks 2 if (node == NULL) {
1136 siliconforks 284 js_ReportUncaughtException(context);
1137 siliconforks 2 fatal("parse error in file: %s", file_id);
1138     }
1139 siliconforks 284 JS_SetErrorReporter(context, old_error_reporter);
1140 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1141 siliconforks 2 lines = xmalloc(num_lines);
1142 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1143 siliconforks 2 lines[i] = 0;
1144     }
1145    
1146 siliconforks 240 /* search code for conditionals */
1147     exclusive_directives = xnew(bool, num_lines);
1148     for (unsigned int i = 0; i < num_lines; i++) {
1149     exclusive_directives[i] = false;
1150 siliconforks 2 }
1151    
1152 siliconforks 157 bool has_conditionals = false;
1153 siliconforks 240 struct IfDirective * if_directives = NULL;
1154 siliconforks 157 size_t line_number = 0;
1155     size_t i = 0;
1156 siliconforks 176 while (i < num_characters) {
1157 siliconforks 240 if (line_number == UINT16_MAX) {
1158     fatal("%s: script has more than 65,535 lines", file_id);
1159     }
1160 siliconforks 157 line_number++;
1161     size_t line_start = i;
1162 siliconforks 190 jschar c;
1163     bool done = false;
1164     while (! done && i < num_characters) {
1165     c = characters[i];
1166     switch (c) {
1167     case '\r':
1168     case '\n':
1169     case 0x2028:
1170     case 0x2029:
1171     done = true;
1172     break;
1173     default:
1174     i++;
1175     }
1176 siliconforks 157 }
1177     size_t line_end = i;
1178 siliconforks 176 if (i < num_characters) {
1179 siliconforks 190 i++;
1180     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1181 siliconforks 157 i++;
1182     }
1183     }
1184 siliconforks 240
1185 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1186 siliconforks 240 has_conditionals = true;
1187    
1188     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1189     exclusive_directives[line_number - 1] = true;
1190 siliconforks 157 }
1191 siliconforks 240 else {
1192     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1193     if_directive->condition_start = characters + line_start + 16;
1194     if_directive->condition_end = characters + line_end;
1195     if_directive->start_line = line_number;
1196     if_directive->end_line = 0;
1197     if_directive->next = if_directives;
1198     if_directives = if_directive;
1199 siliconforks 190 }
1200 siliconforks 157 }
1201 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1202 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1203     if (p->end_line == 0) {
1204     p->end_line = line_number;
1205     break;
1206     }
1207     }
1208 siliconforks 157 }
1209     }
1210    
1211 siliconforks 240 /*
1212     An instrumented JavaScript file has 4 sections:
1213     1. initialization
1214     2. instrumented source code
1215     3. conditionals
1216     4. original source code
1217     */
1218    
1219     Stream * instrumented = Stream_new(0);
1220     instrument_statement(node, instrumented, 0, false);
1221 siliconforks 336 js_FinishParseContext(context, &parse_context);
1222 siliconforks 240
1223     /* write line number info to the output */
1224     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1225     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1226     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1227     Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1228     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1229     for (int i = 0; i < num_lines; i++) {
1230     if (lines[i]) {
1231     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1232     }
1233     }
1234     Stream_write_string(output, "}\n");
1235     free(lines);
1236     lines = NULL;
1237     free(exclusive_directives);
1238     exclusive_directives = NULL;
1239    
1240     /* conditionals */
1241     if (has_conditionals) {
1242     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1243     }
1244    
1245     /* copy the instrumented source code to the output */
1246     Stream_write(output, instrumented->data, instrumented->length);
1247    
1248     /* conditionals */
1249     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1250     Stream_write_string(output, "if (!(");
1251 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1252 siliconforks 240 Stream_write_string(output, ")) {\n");
1253     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1254     Stream_write_string(output, "}\n");
1255     }
1256    
1257     /* free */
1258     while (if_directives != NULL) {
1259     struct IfDirective * if_directive = if_directives;
1260     if_directives = if_directives->next;
1261     free(if_directive);
1262     }
1263    
1264 siliconforks 95 /* copy the original source to the output */
1265 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1266     jscoverage_write_source(id, characters, num_characters, output);
1267     Stream_printf(output, ";\n");
1268 siliconforks 95
1269 siliconforks 179 Stream_delete(instrumented);
1270    
1271     file_id = NULL;
1272     }
1273    
1274     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1275     Stream_write_string(output, "[");
1276     if (jscoverage_highlight) {
1277     Stream * highlighted_stream = Stream_new(num_characters);
1278     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1279     size_t i = 0;
1280     while (i < highlighted_stream->length) {
1281     if (i > 0) {
1282     Stream_write_char(output, ',');
1283     }
1284    
1285     Stream_write_char(output, '"');
1286     bool done = false;
1287     while (! done) {
1288     char c = highlighted_stream->data[i];
1289     switch (c) {
1290     case 0x8:
1291     /* backspace */
1292     Stream_write_string(output, "\\b");
1293     break;
1294     case 0x9:
1295     /* horizontal tab */
1296     Stream_write_string(output, "\\t");
1297     break;
1298     case 0xa:
1299     /* line feed (new line) */
1300     done = true;
1301     break;
1302 siliconforks 317 /* IE doesn't support this */
1303     /*
1304 siliconforks 179 case 0xb:
1305     Stream_write_string(output, "\\v");
1306     break;
1307 siliconforks 317 */
1308 siliconforks 179 case 0xc:
1309     /* form feed */
1310     Stream_write_string(output, "\\f");
1311     break;
1312     case 0xd:
1313     /* carriage return */
1314     done = true;
1315     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1316     i++;
1317     }
1318     break;
1319     case '"':
1320     Stream_write_string(output, "\\\"");
1321     break;
1322     case '\\':
1323     Stream_write_string(output, "\\\\");
1324     break;
1325     default:
1326     Stream_write_char(output, c);
1327     break;
1328     }
1329 siliconforks 95 i++;
1330 siliconforks 179 if (i >= highlighted_stream->length) {
1331     done = true;
1332 siliconforks 95 }
1333     }
1334 siliconforks 179 Stream_write_char(output, '"');
1335     }
1336     Stream_delete(highlighted_stream);
1337     }
1338     else {
1339     size_t i = 0;
1340     while (i < num_characters) {
1341     if (i > 0) {
1342     Stream_write_char(output, ',');
1343     }
1344    
1345     Stream_write_char(output, '"');
1346     bool done = false;
1347     while (! done) {
1348     jschar c = characters[i];
1349     switch (c) {
1350     case 0x8:
1351     /* backspace */
1352     Stream_write_string(output, "\\b");
1353     break;
1354     case 0x9:
1355     /* horizontal tab */
1356     Stream_write_string(output, "\\t");
1357     break;
1358     case 0xa:
1359     /* line feed (new line) */
1360     done = true;
1361     break;
1362 siliconforks 317 /* IE doesn't support this */
1363     /*
1364 siliconforks 179 case 0xb:
1365     Stream_write_string(output, "\\v");
1366     break;
1367 siliconforks 317 */
1368 siliconforks 179 case 0xc:
1369     /* form feed */
1370     Stream_write_string(output, "\\f");
1371     break;
1372     case 0xd:
1373     /* carriage return */
1374     done = true;
1375     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1376     i++;
1377     }
1378     break;
1379     case '"':
1380     Stream_write_string(output, "\\\"");
1381     break;
1382     case '\\':
1383     Stream_write_string(output, "\\\\");
1384     break;
1385     case '&':
1386     Stream_write_string(output, "&amp;");
1387     break;
1388     case '<':
1389     Stream_write_string(output, "&lt;");
1390     break;
1391     case '>':
1392     Stream_write_string(output, "&gt;");
1393     break;
1394     case 0x2028:
1395     case 0x2029:
1396     done = true;
1397     break;
1398     default:
1399     if (32 <= c && c <= 126) {
1400     Stream_write_char(output, c);
1401     }
1402     else {
1403     Stream_printf(output, "&#%d;", c);
1404     }
1405     break;
1406     }
1407 siliconforks 95 i++;
1408 siliconforks 179 if (i >= num_characters) {
1409     done = true;
1410     }
1411 siliconforks 95 }
1412 siliconforks 179 Stream_write_char(output, '"');
1413 siliconforks 95 }
1414     }
1415 siliconforks 179 Stream_write_string(output, "]");
1416 siliconforks 2 }
1417 siliconforks 116
1418     void jscoverage_copy_resources(const char * destination_directory) {
1419     copy_resource("jscoverage.html", destination_directory);
1420     copy_resource("jscoverage.css", destination_directory);
1421     copy_resource("jscoverage.js", destination_directory);
1422 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1423 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1424 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1425 siliconforks 116 }
1426    
1427     /*
1428     coverage reports
1429     */
1430    
1431     struct FileCoverageList {
1432     FileCoverage * file_coverage;
1433     struct FileCoverageList * next;
1434     };
1435    
1436     struct Coverage {
1437     JSHashTable * coverage_table;
1438     struct FileCoverageList * coverage_list;
1439     };
1440    
1441     static int compare_strings(const void * p1, const void * p2) {
1442     return strcmp(p1, p2) == 0;
1443     }
1444    
1445     Coverage * Coverage_new(void) {
1446     Coverage * result = xmalloc(sizeof(Coverage));
1447     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1448     if (result->coverage_table == NULL) {
1449     fatal("cannot create hash table");
1450     }
1451     result->coverage_list = NULL;
1452     return result;
1453     }
1454    
1455     void Coverage_delete(Coverage * coverage) {
1456     JS_HashTableDestroy(coverage->coverage_table);
1457     struct FileCoverageList * p = coverage->coverage_list;
1458     while (p != NULL) {
1459 siliconforks 179 free(p->file_coverage->coverage_lines);
1460     if (p->file_coverage->source_lines != NULL) {
1461     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1462     free(p->file_coverage->source_lines[i]);
1463     }
1464     free(p->file_coverage->source_lines);
1465     }
1466 siliconforks 116 free(p->file_coverage->id);
1467     free(p->file_coverage);
1468     struct FileCoverageList * q = p;
1469     p = p->next;
1470     free(q);
1471     }
1472     free(coverage);
1473     }
1474    
1475     struct EnumeratorArg {
1476     CoverageForeachFunction f;
1477     void * p;
1478     };
1479    
1480     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1481     struct EnumeratorArg * enumerator_arg = arg;
1482     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1483     return 0;
1484     }
1485    
1486     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1487     struct EnumeratorArg enumerator_arg;
1488     enumerator_arg.f = f;
1489     enumerator_arg.p = p;
1490     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1491     }
1492    
1493     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1494 siliconforks 336 int result = 0;
1495    
1496 siliconforks 116 jschar * base = js_InflateString(context, (char *) json, &length);
1497     if (base == NULL) {
1498     fatal("out of memory");
1499     }
1500    
1501     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1502     parenthesized_json[0] = '(';
1503     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1504     parenthesized_json[length + 1] = ')';
1505    
1506     JS_free(context, base);
1507    
1508 siliconforks 336 JSParseContext parse_context;
1509     if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1510     free(parenthesized_json);
1511     return -1;
1512 siliconforks 116 }
1513 siliconforks 336 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1514 siliconforks 116 free(parenthesized_json);
1515     if (root == NULL) {
1516 siliconforks 336 result = -1;
1517     goto done;
1518 siliconforks 116 }
1519    
1520     /* root node must be TOK_LC */
1521     if (root->pn_type != TOK_LC) {
1522 siliconforks 336 result = -1;
1523     goto done;
1524 siliconforks 116 }
1525     JSParseNode * semi = root->pn_u.list.head;
1526    
1527     /* the list must be TOK_SEMI and it must contain only one element */
1528     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1529 siliconforks 336 result = -1;
1530     goto done;
1531 siliconforks 116 }
1532     JSParseNode * parenthesized = semi->pn_kid;
1533    
1534     /* this must be a parenthesized expression */
1535     if (parenthesized->pn_type != TOK_RP) {
1536 siliconforks 336 result = -1;
1537     goto done;
1538 siliconforks 116 }
1539     JSParseNode * object = parenthesized->pn_kid;
1540    
1541     /* this must be an object literal */
1542     if (object->pn_type != TOK_RC) {
1543 siliconforks 336 result = -1;
1544     goto done;
1545 siliconforks 116 }
1546    
1547     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1548     /* every element of this list must be TOK_COLON */
1549     if (p->pn_type != TOK_COLON) {
1550 siliconforks 336 result = -1;
1551     goto done;
1552 siliconforks 116 }
1553    
1554     /* the key must be a string representing the file */
1555     JSParseNode * key = p->pn_left;
1556     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1557 siliconforks 336 result = -1;
1558     goto done;
1559 siliconforks 116 }
1560     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1561    
1562     /* the value must be an object literal OR an array */
1563     JSParseNode * value = p->pn_right;
1564     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1565 siliconforks 336 result = -1;
1566     goto done;
1567 siliconforks 116 }
1568    
1569     JSParseNode * array = NULL;
1570     JSParseNode * source = NULL;
1571     if (value->pn_type == TOK_RB) {
1572     /* an array */
1573     array = value;
1574     }
1575     else if (value->pn_type == TOK_RC) {
1576     /* an object literal */
1577     if (value->pn_count != 2) {
1578 siliconforks 336 result = -1;
1579     goto done;
1580 siliconforks 116 }
1581     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1582     if (element->pn_type != TOK_COLON) {
1583 siliconforks 336 result = -1;
1584     goto done;
1585 siliconforks 116 }
1586     JSParseNode * left = element->pn_left;
1587     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1588 siliconforks 336 result = -1;
1589     goto done;
1590 siliconforks 116 }
1591     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1592     if (strcmp(s, "coverage") == 0) {
1593     array = element->pn_right;
1594     if (array->pn_type != TOK_RB) {
1595 siliconforks 336 result = -1;
1596     goto done;
1597 siliconforks 116 }
1598     }
1599     else if (strcmp(s, "source") == 0) {
1600     source = element->pn_right;
1601 siliconforks 179 if (source->pn_type != TOK_RB) {
1602 siliconforks 336 result = -1;
1603     goto done;
1604 siliconforks 116 }
1605     }
1606     else {
1607 siliconforks 336 result = -1;
1608     goto done;
1609 siliconforks 116 }
1610     }
1611     }
1612     else {
1613 siliconforks 336 result = -1;
1614     goto done;
1615 siliconforks 116 }
1616    
1617     if (array == NULL) {
1618 siliconforks 336 result = -1;
1619     goto done;
1620 siliconforks 116 }
1621    
1622     /* look up the file in the coverage table */
1623     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1624     if (file_coverage == NULL) {
1625     /* not there: create a new one */
1626     char * id = xstrdup(id_bytes);
1627     file_coverage = xmalloc(sizeof(FileCoverage));
1628     file_coverage->id = id;
1629 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1630     file_coverage->coverage_lines = xnew(int, array->pn_count);
1631 siliconforks 245 file_coverage->source_lines = NULL;
1632 siliconforks 116
1633     /* set coverage for all lines */
1634     uint32 i = 0;
1635     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1636     if (element->pn_type == TOK_NUMBER) {
1637 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1638 siliconforks 116 }
1639     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1640 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1641 siliconforks 116 }
1642     else {
1643 siliconforks 336 result = -1;
1644     goto done;
1645 siliconforks 116 }
1646     }
1647     assert(i == array->pn_count);
1648    
1649     /* add to the hash table */
1650     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1651     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1652     coverage_list->file_coverage = file_coverage;
1653     coverage_list->next = coverage->coverage_list;
1654     coverage->coverage_list = coverage_list;
1655     }
1656     else {
1657     /* sanity check */
1658     assert(strcmp(file_coverage->id, id_bytes) == 0);
1659 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1660 siliconforks 336 result = -2;
1661     goto done;
1662 siliconforks 116 }
1663    
1664     /* merge the coverage */
1665     uint32 i = 0;
1666     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1667     if (element->pn_type == TOK_NUMBER) {
1668 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1669 siliconforks 336 result = -2;
1670     goto done;
1671 siliconforks 116 }
1672 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1673 siliconforks 116 }
1674     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1675 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1676 siliconforks 336 result = -2;
1677     goto done;
1678 siliconforks 116 }
1679     }
1680     else {
1681 siliconforks 336 result = -1;
1682     goto done;
1683 siliconforks 116 }
1684     }
1685     assert(i == array->pn_count);
1686 siliconforks 245 }
1687 siliconforks 116
1688 siliconforks 245 /* if this JSON file has source, use it */
1689     if (file_coverage->source_lines == NULL && source != NULL) {
1690     file_coverage->num_source_lines = source->pn_count;
1691     file_coverage->source_lines = xnew(char *, source->pn_count);
1692     uint32 i = 0;
1693     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1694     if (element->pn_type != TOK_STRING) {
1695 siliconforks 336 result = -1;
1696     goto done;
1697 siliconforks 179 }
1698 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1699 siliconforks 116 }
1700 siliconforks 245 assert(i == source->pn_count);
1701 siliconforks 116 }
1702     }
1703    
1704 siliconforks 336 done:
1705     js_FinishParseContext(context, &parse_context);
1706     return result;
1707 siliconforks 116 }

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