/[jscoverage]/trunk/instrument-js.cpp
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Annotation of /trunk/instrument-js.cpp

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Revision 350 - (hide annotations)
Fri Oct 24 16:17:39 2008 UTC (9 years, 9 months ago) by siliconforks
Original Path: trunk/instrument-js.c
File MIME type: text/plain
File size: 51160 byte(s)
Fix bug with let definition in switch statement.
1 siliconforks 2 /*
2     instrument-js.c - JavaScript instrumentation routines
3 siliconforks 87 Copyright (C) 2007, 2008 siliconforks.com
4 siliconforks 2
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9    
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13     GNU General Public License for more details.
14    
15     You should have received a copy of the GNU General Public License along
16     with this program; if not, write to the Free Software Foundation, Inc.,
17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18     */
19    
20 siliconforks 116 #include <config.h>
21    
22 siliconforks 2 #include "instrument-js.h"
23    
24     #include <assert.h>
25     #include <stdlib.h>
26     #include <string.h>
27    
28     #include <jsapi.h>
29 siliconforks 336 #include <jsarena.h>
30 siliconforks 2 #include <jsatom.h>
31 siliconforks 284 #include <jsexn.h>
32 siliconforks 2 #include <jsfun.h>
33     #include <jsinterp.h>
34 siliconforks 339 #include <jsiter.h>
35 siliconforks 2 #include <jsparse.h>
36     #include <jsregexp.h>
37     #include <jsscope.h>
38     #include <jsstr.h>
39    
40 siliconforks 174 #include "encoding.h"
41 siliconforks 179 #include "global.h"
42     #include "highlight.h"
43 siliconforks 116 #include "resource-manager.h"
44 siliconforks 2 #include "util.h"
45    
46 siliconforks 240 struct IfDirective {
47     const jschar * condition_start;
48     const jschar * condition_end;
49     uint16_t start_line;
50     uint16_t end_line;
51     struct IfDirective * next;
52     };
53    
54     static bool * exclusive_directives = NULL;
55    
56 siliconforks 2 static JSRuntime * runtime = NULL;
57     static JSContext * context = NULL;
58     static JSObject * global = NULL;
59 siliconforks 339 static JSVersion js_version = JSVERSION_ECMA_3;
60 siliconforks 2
61     /*
62     JSParseNode objects store line numbers starting from 1.
63     The lines array stores line numbers starting from 0.
64     */
65     static const char * file_id = NULL;
66     static char * lines = NULL;
67 siliconforks 214 static uint16_t num_lines = 0;
68 siliconforks 2
69 siliconforks 339 void jscoverage_set_js_version(const char * version) {
70     js_version = atoi(version);
71     }
72    
73 siliconforks 2 void jscoverage_init(void) {
74     runtime = JS_NewRuntime(8L * 1024L * 1024L);
75     if (runtime == NULL) {
76     fatal("cannot create runtime");
77     }
78    
79     context = JS_NewContext(runtime, 8192);
80     if (context == NULL) {
81     fatal("cannot create context");
82     }
83    
84 siliconforks 339 JS_SetVersion(context, js_version);
85    
86 siliconforks 2 global = JS_NewObject(context, NULL, NULL, NULL);
87     if (global == NULL) {
88     fatal("cannot create global object");
89     }
90    
91     if (! JS_InitStandardClasses(context, global)) {
92     fatal("cannot initialize standard classes");
93     }
94     }
95    
96     void jscoverage_cleanup(void) {
97     JS_DestroyContext(context);
98     JS_DestroyRuntime(runtime);
99     }
100    
101 siliconforks 246 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
102     for (size_t i = 0; i < num_characters; i++) {
103     jschar c = characters[i];
104     /*
105     XXX does not handle no-break space, other unicode "space separator"
106     */
107     switch (c) {
108     case 0x9:
109     case 0xB:
110     case 0xC:
111     Stream_write_char(f, c);
112     break;
113     default:
114     if (32 <= c && c <= 126) {
115     Stream_write_char(f, c);
116     }
117     else {
118     Stream_printf(f, "\\u%04x", c);
119     }
120     break;
121     }
122     }
123     }
124    
125 siliconforks 92 static void print_string(JSString * s, Stream * f) {
126 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
127     jschar * characters = JSSTRING_CHARS(s);
128     for (size_t i = 0; i < length; i++) {
129     jschar c = characters[i];
130     if (32 <= c && c <= 126) {
131     switch (c) {
132     case '"':
133     Stream_write_string(f, "\\\"");
134     break;
135     /*
136     case '\'':
137     Stream_write_string(f, "\\'");
138     break;
139     */
140     case '\\':
141     Stream_write_string(f, "\\\\");
142     break;
143     default:
144     Stream_write_char(f, c);
145     break;
146     }
147     }
148     else {
149     switch (c) {
150     case 0x8:
151     Stream_write_string(f, "\\b");
152     break;
153     case 0x9:
154     Stream_write_string(f, "\\t");
155     break;
156     case 0xa:
157     Stream_write_string(f, "\\n");
158     break;
159 siliconforks 317 /* IE doesn't support this */
160     /*
161 siliconforks 174 case 0xb:
162     Stream_write_string(f, "\\v");
163     break;
164 siliconforks 317 */
165 siliconforks 174 case 0xc:
166     Stream_write_string(f, "\\f");
167     break;
168     case 0xd:
169     Stream_write_string(f, "\\r");
170     break;
171     default:
172     Stream_printf(f, "\\u%04x", c);
173     break;
174     }
175     }
176 siliconforks 2 }
177     }
178    
179 siliconforks 92 static void print_string_atom(JSAtom * atom, Stream * f) {
180 siliconforks 2 assert(ATOM_IS_STRING(atom));
181     JSString * s = ATOM_TO_STRING(atom);
182     print_string(s, f);
183     }
184    
185 siliconforks 174 static void print_regex(jsval value, Stream * f) {
186 siliconforks 2 assert(JSVAL_IS_STRING(value));
187     JSString * s = JSVAL_TO_STRING(value);
188 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
189     jschar * characters = JSSTRING_CHARS(s);
190     for (size_t i = 0; i < length; i++) {
191     jschar c = characters[i];
192     if (32 <= c && c <= 126) {
193     Stream_write_char(f, c);
194     }
195     else {
196     Stream_printf(f, "\\u%04x", c);
197     }
198     }
199 siliconforks 2 }
200    
201 siliconforks 92 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
202 siliconforks 2 assert(ATOM_IS_STRING(atom));
203     JSString * s = ATOM_TO_STRING(atom);
204 siliconforks 174 Stream_write_char(f, '"');
205     print_string(s, f);
206     Stream_write_char(f, '"');
207 siliconforks 2 }
208    
209     static const char * get_op(uint8 op) {
210     switch(op) {
211 siliconforks 336 case JSOP_OR:
212     return "||";
213     case JSOP_AND:
214     return "&&";
215 siliconforks 2 case JSOP_BITOR:
216     return "|";
217     case JSOP_BITXOR:
218     return "^";
219     case JSOP_BITAND:
220     return "&";
221     case JSOP_EQ:
222     return "==";
223     case JSOP_NE:
224     return "!=";
225 siliconforks 336 case JSOP_STRICTEQ:
226 siliconforks 2 return "===";
227 siliconforks 336 case JSOP_STRICTNE:
228 siliconforks 2 return "!==";
229     case JSOP_LT:
230     return "<";
231     case JSOP_LE:
232     return "<=";
233     case JSOP_GT:
234     return ">";
235     case JSOP_GE:
236     return ">=";
237     case JSOP_LSH:
238     return "<<";
239     case JSOP_RSH:
240     return ">>";
241     case JSOP_URSH:
242     return ">>>";
243     case JSOP_ADD:
244     return "+";
245     case JSOP_SUB:
246     return "-";
247     case JSOP_MUL:
248     return "*";
249     case JSOP_DIV:
250     return "/";
251     case JSOP_MOD:
252     return "%";
253     default:
254     abort();
255     }
256     }
257    
258 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f);
259 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
260 siliconforks 345 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
261 siliconforks 2
262 siliconforks 155 enum FunctionType {
263     FUNCTION_NORMAL,
264     FUNCTION_GETTER_OR_SETTER
265     };
266    
267 siliconforks 346 static void output_for_in(JSParseNode * node, Stream * f) {
268     assert(node->pn_type == TOK_FOR);
269     assert(node->pn_arity == PN_BINARY);
270     Stream_write_string(f, "for ");
271     if (node->pn_iflags & JSITER_FOREACH) {
272     Stream_write_string(f, "each ");
273     }
274     Stream_write_char(f, '(');
275     instrument_expression(node->pn_left, f);
276     Stream_write_char(f, ')');
277     }
278    
279 siliconforks 155 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
280 siliconforks 336 assert(node->pn_type == TOK_FUNCTION);
281 siliconforks 156 assert(node->pn_arity == PN_FUNC);
282 siliconforks 336 JSObject * object = node->pn_funpob->object;
283 siliconforks 156 assert(JS_ObjectIsFunction(context, object));
284     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
285     assert(function);
286 siliconforks 336 assert(object == &function->object);
287 siliconforks 156 Stream_printf(f, "%*s", indent, "");
288     if (type == FUNCTION_NORMAL) {
289     Stream_write_string(f, "function");
290     }
291 siliconforks 2
292 siliconforks 156 /* function name */
293     if (function->atom) {
294     Stream_write_char(f, ' ');
295     print_string_atom(function->atom, f);
296     }
297 siliconforks 2
298 siliconforks 336 /*
299     function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
300     js_DecompileFunction in jsopcode.cpp
301     */
302 siliconforks 156 Stream_write_string(f, "(");
303 siliconforks 336 JSArenaPool pool;
304     JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
305     jsuword * local_names = NULL;
306     if (JS_GET_LOCAL_NAME_COUNT(function)) {
307     local_names = js_GetLocalNameArray(context, function, &pool);
308     if (local_names == NULL) {
309     fatal("out of memory");
310 siliconforks 2 }
311 siliconforks 156 }
312     for (int i = 0; i < function->nargs; i++) {
313     if (i > 0) {
314     Stream_write_string(f, ", ");
315 siliconforks 2 }
316 siliconforks 336 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
317     print_string_atom(param, f);
318 siliconforks 156 }
319 siliconforks 336 JS_FinishArenaPool(&pool);
320 siliconforks 156 Stream_write_string(f, ") {\n");
321 siliconforks 2
322 siliconforks 156 /* function body */
323 siliconforks 345 if (function->flags & JSFUN_EXPR_CLOSURE) {
324     /* expression closure */
325     output_statement(node->pn_body, f, indent + 2, false);
326     }
327     else {
328     instrument_statement(node->pn_body, f, indent + 2, false);
329     }
330 siliconforks 2
331 siliconforks 156 Stream_write_string(f, "}\n");
332 siliconforks 2 }
333    
334 siliconforks 92 static void instrument_function_call(JSParseNode * node, Stream * f) {
335 siliconforks 346 if (node->pn_head->pn_type == TOK_FUNCTION) {
336     /* it's a generator expression */
337     JSParseNode * function_node = node->pn_head;
338     JSParseNode * lexical_scope_node = function_node->pn_body;
339     assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE);
340     assert(lexical_scope_node->pn_arity == PN_NAME);
341     JSParseNode * for_node = lexical_scope_node->pn_body;
342     assert(for_node->pn_type == TOK_FOR);
343     assert(for_node->pn_arity == PN_BINARY);
344     JSParseNode * if_node = NULL;
345     JSParseNode * semi_node;
346     switch (for_node->pn_right->pn_type) {
347     case TOK_SEMI:
348     semi_node = for_node->pn_right;
349     break;
350     case TOK_IF:
351     if_node = for_node->pn_right;
352     assert(if_node->pn_arity == PN_TERNARY);
353     semi_node = if_node->pn_kid2;
354     assert(semi_node->pn_type == TOK_SEMI);
355     break;
356     default:
357     abort();
358     break;
359 siliconforks 2 }
360 siliconforks 346 assert(semi_node->pn_arity == PN_UNARY);
361     JSParseNode * yield_node = semi_node->pn_kid;
362     assert(yield_node->pn_type == TOK_YIELD);
363     Stream_write_char(f, '(');
364     instrument_expression(yield_node->pn_kid, f);
365     Stream_write_char(f, ' ');
366     output_for_in(for_node, f);
367     if (if_node) {
368     Stream_write_string(f, " if (");
369     instrument_expression(if_node->pn_kid1, f);
370     Stream_write_char(f, ')');
371     }
372     Stream_write_char(f, ')');
373 siliconforks 2 }
374 siliconforks 346 else {
375     instrument_expression(node->pn_head, f);
376     Stream_write_char(f, '(');
377     for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
378     if (p != node->pn_head->pn_next) {
379     Stream_write_string(f, ", ");
380     }
381     instrument_expression(p, f);
382     }
383     Stream_write_char(f, ')');
384     }
385 siliconforks 2 }
386    
387 siliconforks 340 static void instrument_declarations(JSParseNode * list, Stream * f) {
388     assert(list->pn_arity == PN_LIST);
389     for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
390 siliconforks 341 switch (p->pn_type) {
391     case TOK_NAME:
392     assert(p->pn_arity == PN_NAME);
393     if (p != list->pn_head) {
394     Stream_write_string(f, ", ");
395     }
396     print_string_atom(p->pn_atom, f);
397     if (p->pn_expr != NULL) {
398     Stream_write_string(f, " = ");
399     instrument_expression(p->pn_expr, f);
400     }
401     break;
402     case TOK_ASSIGN:
403     case TOK_RB:
404     case TOK_RC:
405     /* destructuring */
406     instrument_expression(p, f);
407     break;
408     default:
409     abort();
410     break;
411 siliconforks 340 }
412     }
413     }
414    
415 siliconforks 2 /*
416     See <Expressions> in jsparse.h.
417     TOK_FUNCTION is handled as a statement and as an expression.
418     TOK_DBLDOT is not handled (XML op).
419     TOK_DEFSHARP and TOK_USESHARP are not handled.
420     TOK_ANYNAME is not handled (XML op).
421     TOK_AT is not handled (XML op).
422     TOK_DBLCOLON is not handled.
423     TOK_XML* are not handled.
424     There seem to be some undocumented expressions:
425     TOK_INSTANCEOF binary
426     TOK_IN binary
427     */
428 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
429 siliconforks 2 switch (node->pn_type) {
430     case TOK_FUNCTION:
431 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
432 siliconforks 2 break;
433     case TOK_COMMA:
434     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
435     if (p != node->pn_head) {
436 siliconforks 92 Stream_write_string(f, ", ");
437 siliconforks 2 }
438     instrument_expression(p, f);
439     }
440     break;
441     case TOK_ASSIGN:
442     instrument_expression(node->pn_left, f);
443 siliconforks 92 Stream_write_char(f, ' ');
444 siliconforks 2 switch (node->pn_op) {
445     case JSOP_ADD:
446     case JSOP_SUB:
447     case JSOP_MUL:
448     case JSOP_MOD:
449     case JSOP_LSH:
450     case JSOP_RSH:
451     case JSOP_URSH:
452     case JSOP_BITAND:
453     case JSOP_BITOR:
454     case JSOP_BITXOR:
455     case JSOP_DIV:
456 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
457 siliconforks 2 break;
458     default:
459     /* do nothing - it must be a simple assignment */
460     break;
461     }
462 siliconforks 92 Stream_write_string(f, "= ");
463 siliconforks 2 instrument_expression(node->pn_right, f);
464     break;
465     case TOK_HOOK:
466     instrument_expression(node->pn_kid1, f);
467 siliconforks 92 Stream_write_string(f, "? ");
468 siliconforks 2 instrument_expression(node->pn_kid2, f);
469 siliconforks 92 Stream_write_string(f, ": ");
470 siliconforks 2 instrument_expression(node->pn_kid3, f);
471     break;
472     case TOK_OR:
473     case TOK_AND:
474     case TOK_BITOR:
475     case TOK_BITXOR:
476     case TOK_BITAND:
477     case TOK_EQOP:
478     case TOK_RELOP:
479     case TOK_SHOP:
480     case TOK_PLUS:
481     case TOK_MINUS:
482     case TOK_STAR:
483     case TOK_DIVOP:
484     switch (node->pn_arity) {
485     case PN_BINARY:
486     instrument_expression(node->pn_left, f);
487 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
488 siliconforks 2 instrument_expression(node->pn_right, f);
489     break;
490     case PN_LIST:
491     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
492     if (p != node->pn_head) {
493 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
494 siliconforks 2 }
495     instrument_expression(p, f);
496     }
497     break;
498     default:
499     abort();
500     }
501     break;
502     case TOK_UNARYOP:
503     switch (node->pn_op) {
504     case JSOP_NEG:
505 siliconforks 92 Stream_write_char(f, '-');
506 siliconforks 2 instrument_expression(node->pn_kid, f);
507     break;
508     case JSOP_POS:
509 siliconforks 92 Stream_write_char(f, '+');
510 siliconforks 2 instrument_expression(node->pn_kid, f);
511     break;
512     case JSOP_NOT:
513 siliconforks 92 Stream_write_char(f, '!');
514 siliconforks 2 instrument_expression(node->pn_kid, f);
515     break;
516     case JSOP_BITNOT:
517 siliconforks 92 Stream_write_char(f, '~');
518 siliconforks 2 instrument_expression(node->pn_kid, f);
519     break;
520     case JSOP_TYPEOF:
521 siliconforks 92 Stream_write_string(f, "typeof ");
522 siliconforks 2 instrument_expression(node->pn_kid, f);
523     break;
524     case JSOP_VOID:
525 siliconforks 92 Stream_write_string(f, "void ");
526 siliconforks 2 instrument_expression(node->pn_kid, f);
527     break;
528     default:
529     abort();
530     break;
531     }
532     break;
533     case TOK_INC:
534     case TOK_DEC:
535     /*
536     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
537     */
538     switch (node->pn_op) {
539     case JSOP_INCNAME:
540     case JSOP_INCPROP:
541     case JSOP_INCELEM:
542 siliconforks 92 Stream_write_string(f, "++");
543 siliconforks 2 instrument_expression(node->pn_kid, f);
544     break;
545     case JSOP_DECNAME:
546     case JSOP_DECPROP:
547     case JSOP_DECELEM:
548 siliconforks 92 Stream_write_string(f, "--");
549 siliconforks 2 instrument_expression(node->pn_kid, f);
550     break;
551     case JSOP_NAMEINC:
552     case JSOP_PROPINC:
553     case JSOP_ELEMINC:
554     instrument_expression(node->pn_kid, f);
555 siliconforks 92 Stream_write_string(f, "++");
556 siliconforks 2 break;
557     case JSOP_NAMEDEC:
558     case JSOP_PROPDEC:
559     case JSOP_ELEMDEC:
560     instrument_expression(node->pn_kid, f);
561 siliconforks 92 Stream_write_string(f, "--");
562 siliconforks 2 break;
563     default:
564     abort();
565     break;
566     }
567     break;
568     case TOK_NEW:
569 siliconforks 92 Stream_write_string(f, "new ");
570 siliconforks 2 instrument_function_call(node, f);
571     break;
572     case TOK_DELETE:
573 siliconforks 92 Stream_write_string(f, "delete ");
574 siliconforks 2 instrument_expression(node->pn_kid, f);
575     break;
576     case TOK_DOT:
577     /*
578     This may have originally been x['foo-bar']. Because the string 'foo-bar'
579     contains illegal characters, we have to use the subscript syntax instead of
580     the dot syntax.
581     */
582     instrument_expression(node->pn_expr, f);
583 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
584     {
585     JSString * s = ATOM_TO_STRING(node->pn_atom);
586 siliconforks 349 bool must_quote;
587     if (JSSTRING_LENGTH(s) == 0) {
588     must_quote = true;
589 siliconforks 84 }
590 siliconforks 349 else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
591     must_quote = true;
592     }
593     else if (! js_IsIdentifier(s)) {
594     must_quote = true;
595     }
596 siliconforks 84 else {
597 siliconforks 349 must_quote = false;
598     }
599     if (must_quote) {
600 siliconforks 92 Stream_write_char(f, '[');
601 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
602 siliconforks 92 Stream_write_char(f, ']');
603 siliconforks 84 }
604 siliconforks 349 else {
605     Stream_write_char(f, '.');
606     print_string_atom(node->pn_atom, f);
607     }
608 siliconforks 84 }
609 siliconforks 2 break;
610     case TOK_LB:
611     instrument_expression(node->pn_left, f);
612 siliconforks 92 Stream_write_char(f, '[');
613 siliconforks 2 instrument_expression(node->pn_right, f);
614 siliconforks 92 Stream_write_char(f, ']');
615 siliconforks 2 break;
616     case TOK_LP:
617     instrument_function_call(node, f);
618     break;
619     case TOK_RB:
620 siliconforks 92 Stream_write_char(f, '[');
621 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
622     if (p != node->pn_head) {
623 siliconforks 92 Stream_write_string(f, ", ");
624 siliconforks 2 }
625     /* TOK_COMMA is a special case: a hole in the array */
626     if (p->pn_type != TOK_COMMA) {
627     instrument_expression(p, f);
628     }
629     }
630     if (node->pn_extra == PNX_ENDCOMMA) {
631 siliconforks 92 Stream_write_char(f, ',');
632 siliconforks 2 }
633 siliconforks 92 Stream_write_char(f, ']');
634 siliconforks 2 break;
635     case TOK_RC:
636 siliconforks 92 Stream_write_char(f, '{');
637 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
638     assert(p->pn_type == TOK_COLON);
639     if (p != node->pn_head) {
640 siliconforks 92 Stream_write_string(f, ", ");
641 siliconforks 2 }
642 siliconforks 155
643     /* check whether this is a getter or setter */
644     switch (p->pn_op) {
645     case JSOP_GETTER:
646     case JSOP_SETTER:
647 siliconforks 293 if (p->pn_op == JSOP_GETTER) {
648     Stream_write_string(f, "get ");
649     }
650     else {
651     Stream_write_string(f, "set ");
652     }
653 siliconforks 155 instrument_expression(p->pn_left, f);
654 siliconforks 293 if (p->pn_right->pn_type != TOK_FUNCTION) {
655     fatal("parse error: expected function");
656     }
657 siliconforks 155 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
658     break;
659     default:
660     instrument_expression(p->pn_left, f);
661     Stream_write_string(f, ": ");
662     instrument_expression(p->pn_right, f);
663     break;
664     }
665 siliconforks 2 }
666 siliconforks 92 Stream_write_char(f, '}');
667 siliconforks 2 break;
668     case TOK_RP:
669 siliconforks 92 Stream_write_char(f, '(');
670 siliconforks 2 instrument_expression(node->pn_kid, f);
671 siliconforks 92 Stream_write_char(f, ')');
672 siliconforks 2 break;
673     case TOK_NAME:
674     print_string_atom(node->pn_atom, f);
675     break;
676     case TOK_STRING:
677     print_quoted_string_atom(node->pn_atom, f);
678     break;
679 siliconforks 336 case TOK_REGEXP:
680     assert(node->pn_op == JSOP_REGEXP);
681     {
682     JSObject * object = node->pn_pob->object;
683     jsval result;
684     js_regexp_toString(context, object, &result);
685     print_regex(result, f);
686 siliconforks 2 }
687     break;
688     case TOK_NUMBER:
689     /*
690     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
691     2^(-52) = 2.22 x 10^(-16)
692     Thus there are 16 significant digits.
693     To keep the output simple, special-case zero.
694     */
695     if (node->pn_dval == 0.0) {
696 siliconforks 92 Stream_write_string(f, "0");
697 siliconforks 2 }
698     else {
699 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
700 siliconforks 2 }
701     break;
702     case TOK_PRIMARY:
703     switch (node->pn_op) {
704     case JSOP_TRUE:
705 siliconforks 92 Stream_write_string(f, "true");
706 siliconforks 2 break;
707     case JSOP_FALSE:
708 siliconforks 92 Stream_write_string(f, "false");
709 siliconforks 2 break;
710     case JSOP_NULL:
711 siliconforks 92 Stream_write_string(f, "null");
712 siliconforks 2 break;
713     case JSOP_THIS:
714 siliconforks 92 Stream_write_string(f, "this");
715 siliconforks 2 break;
716     /* jsscan.h mentions `super' ??? */
717     default:
718     abort();
719     }
720     break;
721     case TOK_INSTANCEOF:
722     instrument_expression(node->pn_left, f);
723 siliconforks 92 Stream_write_string(f, " instanceof ");
724 siliconforks 2 instrument_expression(node->pn_right, f);
725     break;
726     case TOK_IN:
727     instrument_expression(node->pn_left, f);
728 siliconforks 92 Stream_write_string(f, " in ");
729 siliconforks 2 instrument_expression(node->pn_right, f);
730     break;
731 siliconforks 340 case TOK_LEXICALSCOPE:
732     assert(node->pn_arity == PN_NAME);
733     assert(node->pn_expr->pn_type == TOK_LET);
734     assert(node->pn_expr->pn_arity == PN_BINARY);
735     Stream_write_string(f, "let(");
736     assert(node->pn_expr->pn_left->pn_type == TOK_LP);
737     assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
738     instrument_declarations(node->pn_expr->pn_left, f);
739     Stream_write_string(f, ") ");
740     instrument_expression(node->pn_expr->pn_right, f);
741     break;
742 siliconforks 342 case TOK_YIELD:
743     assert(node->pn_arity == PN_UNARY);
744     Stream_write_string(f, "yield ");
745     instrument_expression(node->pn_kid, f);
746     break;
747 siliconforks 343 case TOK_ARRAYCOMP:
748     assert(node->pn_arity == PN_LIST);
749     {
750     JSParseNode * block_node;
751     switch (node->pn_count) {
752     case 1:
753     block_node = node->pn_head;
754     break;
755     case 2:
756     block_node = node->pn_head->pn_next;
757     break;
758     default:
759     abort();
760     break;
761     }
762     assert(block_node->pn_type == TOK_LEXICALSCOPE);
763     assert(block_node->pn_arity == PN_NAME);
764     JSParseNode * for_node = block_node->pn_expr;
765     assert(for_node->pn_type == TOK_FOR);
766     assert(for_node->pn_arity == PN_BINARY);
767 siliconforks 346 JSParseNode * if_node = NULL;
768 siliconforks 343 JSParseNode * push_node;
769     switch (for_node->pn_right->pn_type) {
770     case TOK_ARRAYPUSH:
771     push_node = for_node->pn_right;
772     assert(push_node->pn_arity == PN_UNARY);
773     break;
774     case TOK_IF:
775     if_node = for_node->pn_right;
776     assert(if_node->pn_arity == PN_TERNARY);
777     push_node = if_node->pn_kid2;
778     break;
779     default:
780     abort();
781     break;
782     }
783     Stream_write_char(f, '[');
784     instrument_expression(push_node->pn_kid, f);
785     Stream_write_char(f, ' ');
786     output_for_in(for_node, f);
787     if (if_node) {
788     Stream_write_string(f, " if (");
789     instrument_expression(if_node->pn_kid1, f);
790     Stream_write_char(f, ')');
791     }
792     Stream_write_char(f, ']');
793     }
794     break;
795     case TOK_VAR:
796     assert(node->pn_arity == PN_LIST);
797     Stream_write_string(f, "var ");
798     instrument_declarations(node, f);
799     break;
800     case TOK_LET:
801     assert(node->pn_arity == PN_LIST);
802     Stream_write_string(f, "let ");
803     instrument_declarations(node, f);
804     break;
805 siliconforks 2 default:
806     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
807     }
808     }
809    
810 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
811 siliconforks 2 switch (node->pn_type) {
812     case TOK_FUNCTION:
813 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
814 siliconforks 2 break;
815     case TOK_LC:
816     assert(node->pn_arity == PN_LIST);
817     /*
818 siliconforks 92 Stream_write_string(f, "{\n");
819 siliconforks 2 */
820     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
821 siliconforks 240 instrument_statement(p, f, indent, false);
822 siliconforks 2 }
823     /*
824 siliconforks 92 Stream_printf(f, "%*s", indent, "");
825     Stream_write_string(f, "}\n");
826 siliconforks 2 */
827     break;
828     case TOK_IF:
829 siliconforks 240 {
830 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
831 siliconforks 240
832     uint16_t line = node->pn_pos.begin.lineno;
833     if (! is_jscoverage_if) {
834     if (line > num_lines) {
835     fatal("%s: script contains more than 65,535 lines", file_id);
836     }
837     if (line >= 2 && exclusive_directives[line - 2]) {
838     is_jscoverage_if = true;
839     }
840     }
841    
842 siliconforks 92 Stream_printf(f, "%*s", indent, "");
843     Stream_write_string(f, "if (");
844 siliconforks 2 instrument_expression(node->pn_kid1, f);
845 siliconforks 92 Stream_write_string(f, ") {\n");
846 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
847     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
848     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
849     Stream_printf(f, "%*s", indent + 2, "");
850     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
851     }
852     instrument_statement(node->pn_kid2, f, indent + 2, false);
853 siliconforks 92 Stream_printf(f, "%*s", indent, "");
854     Stream_write_string(f, "}\n");
855 siliconforks 240
856     if (node->pn_kid3 || is_jscoverage_if) {
857 siliconforks 92 Stream_printf(f, "%*s", indent, "");
858     Stream_write_string(f, "else {\n");
859 siliconforks 240
860     if (is_jscoverage_if) {
861     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
862     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
863     Stream_printf(f, "%*s", indent + 2, "");
864     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
865     }
866    
867     if (node->pn_kid3) {
868     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
869     }
870    
871 siliconforks 92 Stream_printf(f, "%*s", indent, "");
872     Stream_write_string(f, "}\n");
873 siliconforks 2 }
874 siliconforks 240
875 siliconforks 2 break;
876 siliconforks 240 }
877 siliconforks 2 case TOK_SWITCH:
878     assert(node->pn_arity == PN_BINARY);
879 siliconforks 92 Stream_printf(f, "%*s", indent, "");
880     Stream_write_string(f, "switch (");
881 siliconforks 2 instrument_expression(node->pn_left, f);
882 siliconforks 92 Stream_write_string(f, ") {\n");
883 siliconforks 350 {
884     JSParseNode * list = node->pn_right;
885     if (list->pn_type == TOK_LEXICALSCOPE) {
886     list = list->pn_expr;
887 siliconforks 2 }
888 siliconforks 350 for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
889     Stream_printf(f, "%*s", indent, "");
890     switch (p->pn_type) {
891     case TOK_CASE:
892     Stream_write_string(f, "case ");
893     instrument_expression(p->pn_left, f);
894     Stream_write_string(f, ":\n");
895     break;
896     case TOK_DEFAULT:
897     Stream_write_string(f, "default:\n");
898     break;
899     default:
900     abort();
901     break;
902     }
903     instrument_statement(p->pn_right, f, indent + 2, false);
904     }
905 siliconforks 2 }
906 siliconforks 92 Stream_printf(f, "%*s", indent, "");
907     Stream_write_string(f, "}\n");
908 siliconforks 2 break;
909     case TOK_CASE:
910     case TOK_DEFAULT:
911     abort();
912     break;
913     case TOK_WHILE:
914     assert(node->pn_arity == PN_BINARY);
915 siliconforks 92 Stream_printf(f, "%*s", indent, "");
916     Stream_write_string(f, "while (");
917 siliconforks 2 instrument_expression(node->pn_left, f);
918 siliconforks 92 Stream_write_string(f, ") {\n");
919 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
920 siliconforks 92 Stream_write_string(f, "}\n");
921 siliconforks 2 break;
922     case TOK_DO:
923     assert(node->pn_arity == PN_BINARY);
924 siliconforks 92 Stream_printf(f, "%*s", indent, "");
925     Stream_write_string(f, "do {\n");
926 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
927 siliconforks 92 Stream_write_string(f, "}\n");
928     Stream_printf(f, "%*s", indent, "");
929     Stream_write_string(f, "while (");
930 siliconforks 2 instrument_expression(node->pn_right, f);
931 siliconforks 92 Stream_write_string(f, ");\n");
932 siliconforks 2 break;
933     case TOK_FOR:
934     assert(node->pn_arity == PN_BINARY);
935 siliconforks 92 Stream_printf(f, "%*s", indent, "");
936 siliconforks 2 switch (node->pn_left->pn_type) {
937     case TOK_IN:
938     /* for/in */
939     assert(node->pn_left->pn_arity == PN_BINARY);
940 siliconforks 343 output_for_in(node, f);
941 siliconforks 2 break;
942     case TOK_RESERVED:
943     /* for (;;) */
944     assert(node->pn_left->pn_arity == PN_TERNARY);
945 siliconforks 343 Stream_write_string(f, "for (");
946 siliconforks 2 if (node->pn_left->pn_kid1) {
947 siliconforks 343 instrument_expression(node->pn_left->pn_kid1, f);
948 siliconforks 2 }
949 siliconforks 92 Stream_write_string(f, ";");
950 siliconforks 2 if (node->pn_left->pn_kid2) {
951 siliconforks 92 Stream_write_char(f, ' ');
952 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
953     }
954 siliconforks 92 Stream_write_string(f, ";");
955 siliconforks 2 if (node->pn_left->pn_kid3) {
956 siliconforks 92 Stream_write_char(f, ' ');
957 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
958     }
959 siliconforks 343 Stream_write_char(f, ')');
960 siliconforks 2 break;
961     default:
962     abort();
963     break;
964     }
965 siliconforks 343 Stream_write_string(f, " {\n");
966 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
967 siliconforks 92 Stream_write_string(f, "}\n");
968 siliconforks 2 break;
969     case TOK_THROW:
970     assert(node->pn_arity == PN_UNARY);
971 siliconforks 92 Stream_printf(f, "%*s", indent, "");
972     Stream_write_string(f, "throw ");
973 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
974 siliconforks 92 Stream_write_string(f, ";\n");
975 siliconforks 2 break;
976     case TOK_TRY:
977 siliconforks 92 Stream_printf(f, "%*s", indent, "");
978     Stream_write_string(f, "try {\n");
979 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
980 siliconforks 92 Stream_printf(f, "%*s", indent, "");
981     Stream_write_string(f, "}\n");
982 siliconforks 336 if (node->pn_kid2) {
983     assert(node->pn_kid2->pn_type == TOK_RESERVED);
984     for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
985     assert(scope->pn_type == TOK_LEXICALSCOPE);
986     JSParseNode * catch = scope->pn_expr;
987 siliconforks 2 assert(catch->pn_type == TOK_CATCH);
988 siliconforks 92 Stream_printf(f, "%*s", indent, "");
989     Stream_write_string(f, "catch (");
990 siliconforks 341 /* this may not be a name - destructuring assignment */
991     /*
992 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
993     print_string_atom(catch->pn_kid1->pn_atom, f);
994 siliconforks 341 */
995     instrument_expression(catch->pn_kid1, f);
996 siliconforks 336 if (catch->pn_kid2) {
997 siliconforks 92 Stream_write_string(f, " if ");
998 siliconforks 336 instrument_expression(catch->pn_kid2, f);
999 siliconforks 2 }
1000 siliconforks 92 Stream_write_string(f, ") {\n");
1001 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
1002 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1003     Stream_write_string(f, "}\n");
1004 siliconforks 2 }
1005     }
1006     if (node->pn_kid3) {
1007 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1008     Stream_write_string(f, "finally {\n");
1009 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
1010 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1011     Stream_write_string(f, "}\n");
1012 siliconforks 2 }
1013     break;
1014     case TOK_CATCH:
1015     abort();
1016     break;
1017     case TOK_BREAK:
1018     case TOK_CONTINUE:
1019     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1020 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1021     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1022 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
1023     if (atom != NULL) {
1024 siliconforks 92 Stream_write_char(f, ' ');
1025 siliconforks 2 print_string_atom(node->pn_atom, f);
1026     }
1027 siliconforks 92 Stream_write_string(f, ";\n");
1028 siliconforks 2 break;
1029     case TOK_WITH:
1030     assert(node->pn_arity == PN_BINARY);
1031 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1032     Stream_write_string(f, "with (");
1033 siliconforks 2 instrument_expression(node->pn_left, f);
1034 siliconforks 92 Stream_write_string(f, ") {\n");
1035 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
1036 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1037     Stream_write_string(f, "}\n");
1038 siliconforks 2 break;
1039     case TOK_VAR:
1040 siliconforks 343 Stream_printf(f, "%*s", indent, "");
1041     instrument_expression(node, f);
1042 siliconforks 92 Stream_write_string(f, ";\n");
1043 siliconforks 2 break;
1044     case TOK_RETURN:
1045     assert(node->pn_arity == PN_UNARY);
1046 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1047     Stream_write_string(f, "return");
1048 siliconforks 2 if (node->pn_kid != NULL) {
1049 siliconforks 92 Stream_write_char(f, ' ');
1050 siliconforks 2 instrument_expression(node->pn_kid, f);
1051     }
1052 siliconforks 92 Stream_write_string(f, ";\n");
1053 siliconforks 2 break;
1054     case TOK_SEMI:
1055     assert(node->pn_arity == PN_UNARY);
1056 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1057 siliconforks 2 if (node->pn_kid != NULL) {
1058     instrument_expression(node->pn_kid, f);
1059     }
1060 siliconforks 92 Stream_write_string(f, ";\n");
1061 siliconforks 2 break;
1062     case TOK_COLON:
1063     assert(node->pn_arity == PN_NAME);
1064     /*
1065     This one is tricky: can't output instrumentation between the label and the
1066     statement it's supposed to label ...
1067     */
1068 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1069 siliconforks 2 print_string_atom(node->pn_atom, f);
1070 siliconforks 92 Stream_write_string(f, ":\n");
1071 siliconforks 2 /*
1072     ... use output_statement instead of instrument_statement.
1073     */
1074 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
1075 siliconforks 2 break;
1076 siliconforks 340 case TOK_LEXICALSCOPE:
1077     /* let statement */
1078     assert(node->pn_arity == PN_NAME);
1079     switch (node->pn_expr->pn_type) {
1080     case TOK_LET:
1081     /* let statement */
1082     assert(node->pn_expr->pn_arity == PN_BINARY);
1083     instrument_statement(node->pn_expr, f, indent, false);
1084     break;
1085     case TOK_LC:
1086     /* block */
1087     Stream_printf(f, "%*s", indent, "");
1088     Stream_write_string(f, "{\n");
1089     instrument_statement(node->pn_expr, f, indent + 2, false);
1090     Stream_printf(f, "%*s", indent, "");
1091     Stream_write_string(f, "}\n");
1092     break;
1093     case TOK_FOR:
1094     instrument_statement(node->pn_expr, f, indent, false);
1095     break;
1096     default:
1097     abort();
1098     break;
1099     }
1100     break;
1101     case TOK_LET:
1102     switch (node->pn_arity) {
1103     case PN_BINARY:
1104     /* let statement */
1105     Stream_printf(f, "%*s", indent, "");
1106     Stream_write_string(f, "let (");
1107     assert(node->pn_left->pn_type == TOK_LP);
1108     assert(node->pn_left->pn_arity == PN_LIST);
1109     instrument_declarations(node->pn_left, f);
1110     Stream_write_string(f, ") {\n");
1111     instrument_statement(node->pn_right, f, indent + 2, false);
1112     Stream_printf(f, "%*s", indent, "");
1113     Stream_write_string(f, "}\n");
1114     break;
1115     case PN_LIST:
1116     /* let definition */
1117 siliconforks 343 Stream_printf(f, "%*s", indent, "");
1118     instrument_expression(node, f);
1119 siliconforks 340 Stream_write_string(f, ";\n");
1120     break;
1121     default:
1122     abort();
1123     break;
1124     }
1125     break;
1126 siliconforks 348 case TOK_DEBUGGER:
1127     Stream_printf(f, "%*s", indent, "");
1128     Stream_write_string(f, "debugger;\n");
1129     break;
1130 siliconforks 2 default:
1131     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1132     }
1133     }
1134    
1135     /*
1136     See <Statements> in jsparse.h.
1137     TOK_FUNCTION is handled as a statement and as an expression.
1138     TOK_EXPORT, TOK_IMPORT are not handled.
1139     */
1140 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1141 siliconforks 340 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1142 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
1143     if (line > num_lines) {
1144     fatal("%s: script contains more than 65,535 lines", file_id);
1145     }
1146    
1147 siliconforks 2 /* the root node has line number 0 */
1148     if (line != 0) {
1149 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1150     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1151 siliconforks 2 lines[line - 1] = 1;
1152     }
1153     }
1154 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
1155 siliconforks 2 }
1156    
1157 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1158     const jschar * characters_end = characters + line_end;
1159     const jschar * cp = characters + line_start;
1160     const char * bp = prefix;
1161     for (;;) {
1162     if (*bp == '\0') {
1163     return true;
1164     }
1165     else if (cp == characters_end) {
1166     return false;
1167     }
1168     else if (*cp != *bp) {
1169     return false;
1170     }
1171     bp++;
1172     cp++;
1173     }
1174     }
1175    
1176 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1177     /* XXX - other Unicode space */
1178     const jschar * end = characters + line_end;
1179     for (const jschar * p = characters + line_start; p < end; p++) {
1180     jschar c = *p;
1181     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1182     continue;
1183     }
1184     else {
1185     return false;
1186     }
1187     }
1188     return true;
1189     }
1190    
1191 siliconforks 284 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1192     fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1193     }
1194    
1195 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1196 siliconforks 2 file_id = id;
1197    
1198 siliconforks 336 /* parse the javascript */
1199     JSParseContext parse_context;
1200     if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1201 siliconforks 2 fatal("cannot create token stream from file: %s", file_id);
1202     }
1203 siliconforks 284 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1204 siliconforks 336 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1205 siliconforks 2 if (node == NULL) {
1206 siliconforks 284 js_ReportUncaughtException(context);
1207 siliconforks 2 fatal("parse error in file: %s", file_id);
1208     }
1209 siliconforks 284 JS_SetErrorReporter(context, old_error_reporter);
1210 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1211 siliconforks 2 lines = xmalloc(num_lines);
1212 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1213 siliconforks 2 lines[i] = 0;
1214     }
1215    
1216 siliconforks 240 /* search code for conditionals */
1217     exclusive_directives = xnew(bool, num_lines);
1218     for (unsigned int i = 0; i < num_lines; i++) {
1219     exclusive_directives[i] = false;
1220 siliconforks 2 }
1221    
1222 siliconforks 157 bool has_conditionals = false;
1223 siliconforks 240 struct IfDirective * if_directives = NULL;
1224 siliconforks 157 size_t line_number = 0;
1225     size_t i = 0;
1226 siliconforks 176 while (i < num_characters) {
1227 siliconforks 240 if (line_number == UINT16_MAX) {
1228     fatal("%s: script has more than 65,535 lines", file_id);
1229     }
1230 siliconforks 157 line_number++;
1231     size_t line_start = i;
1232 siliconforks 190 jschar c;
1233     bool done = false;
1234     while (! done && i < num_characters) {
1235     c = characters[i];
1236     switch (c) {
1237     case '\r':
1238     case '\n':
1239     case 0x2028:
1240     case 0x2029:
1241     done = true;
1242     break;
1243     default:
1244     i++;
1245     }
1246 siliconforks 157 }
1247     size_t line_end = i;
1248 siliconforks 176 if (i < num_characters) {
1249 siliconforks 190 i++;
1250     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1251 siliconforks 157 i++;
1252     }
1253     }
1254 siliconforks 240
1255 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1256 siliconforks 240 has_conditionals = true;
1257    
1258     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1259     exclusive_directives[line_number - 1] = true;
1260 siliconforks 157 }
1261 siliconforks 240 else {
1262     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1263     if_directive->condition_start = characters + line_start + 16;
1264     if_directive->condition_end = characters + line_end;
1265     if_directive->start_line = line_number;
1266     if_directive->end_line = 0;
1267     if_directive->next = if_directives;
1268     if_directives = if_directive;
1269 siliconforks 190 }
1270 siliconforks 157 }
1271 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1272 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1273     if (p->end_line == 0) {
1274     p->end_line = line_number;
1275     break;
1276     }
1277     }
1278 siliconforks 157 }
1279     }
1280    
1281 siliconforks 240 /*
1282     An instrumented JavaScript file has 4 sections:
1283     1. initialization
1284     2. instrumented source code
1285     3. conditionals
1286     4. original source code
1287     */
1288    
1289     Stream * instrumented = Stream_new(0);
1290     instrument_statement(node, instrumented, 0, false);
1291 siliconforks 336 js_FinishParseContext(context, &parse_context);
1292 siliconforks 240
1293     /* write line number info to the output */
1294     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1295     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1296     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1297     Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1298     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1299     for (int i = 0; i < num_lines; i++) {
1300     if (lines[i]) {
1301     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1302     }
1303     }
1304     Stream_write_string(output, "}\n");
1305     free(lines);
1306     lines = NULL;
1307     free(exclusive_directives);
1308     exclusive_directives = NULL;
1309    
1310     /* conditionals */
1311     if (has_conditionals) {
1312     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1313     }
1314    
1315     /* copy the instrumented source code to the output */
1316     Stream_write(output, instrumented->data, instrumented->length);
1317    
1318     /* conditionals */
1319     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1320     Stream_write_string(output, "if (!(");
1321 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1322 siliconforks 240 Stream_write_string(output, ")) {\n");
1323     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1324     Stream_write_string(output, "}\n");
1325     }
1326    
1327     /* free */
1328     while (if_directives != NULL) {
1329     struct IfDirective * if_directive = if_directives;
1330     if_directives = if_directives->next;
1331     free(if_directive);
1332     }
1333    
1334 siliconforks 95 /* copy the original source to the output */
1335 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1336     jscoverage_write_source(id, characters, num_characters, output);
1337     Stream_printf(output, ";\n");
1338 siliconforks 95
1339 siliconforks 179 Stream_delete(instrumented);
1340    
1341     file_id = NULL;
1342     }
1343    
1344     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1345     Stream_write_string(output, "[");
1346     if (jscoverage_highlight) {
1347     Stream * highlighted_stream = Stream_new(num_characters);
1348     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1349     size_t i = 0;
1350     while (i < highlighted_stream->length) {
1351     if (i > 0) {
1352     Stream_write_char(output, ',');
1353     }
1354    
1355     Stream_write_char(output, '"');
1356     bool done = false;
1357     while (! done) {
1358     char c = highlighted_stream->data[i];
1359     switch (c) {
1360     case 0x8:
1361     /* backspace */
1362     Stream_write_string(output, "\\b");
1363     break;
1364     case 0x9:
1365     /* horizontal tab */
1366     Stream_write_string(output, "\\t");
1367     break;
1368     case 0xa:
1369     /* line feed (new line) */
1370     done = true;
1371     break;
1372 siliconforks 317 /* IE doesn't support this */
1373     /*
1374 siliconforks 179 case 0xb:
1375     Stream_write_string(output, "\\v");
1376     break;
1377 siliconforks 317 */
1378 siliconforks 179 case 0xc:
1379     /* form feed */
1380     Stream_write_string(output, "\\f");
1381     break;
1382     case 0xd:
1383     /* carriage return */
1384     done = true;
1385     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1386     i++;
1387     }
1388     break;
1389     case '"':
1390     Stream_write_string(output, "\\\"");
1391     break;
1392     case '\\':
1393     Stream_write_string(output, "\\\\");
1394     break;
1395     default:
1396     Stream_write_char(output, c);
1397     break;
1398     }
1399 siliconforks 95 i++;
1400 siliconforks 179 if (i >= highlighted_stream->length) {
1401     done = true;
1402 siliconforks 95 }
1403     }
1404 siliconforks 179 Stream_write_char(output, '"');
1405     }
1406     Stream_delete(highlighted_stream);
1407     }
1408     else {
1409     size_t i = 0;
1410     while (i < num_characters) {
1411     if (i > 0) {
1412     Stream_write_char(output, ',');
1413     }
1414    
1415     Stream_write_char(output, '"');
1416     bool done = false;
1417     while (! done) {
1418     jschar c = characters[i];
1419     switch (c) {
1420     case 0x8:
1421     /* backspace */
1422     Stream_write_string(output, "\\b");
1423     break;
1424     case 0x9:
1425     /* horizontal tab */
1426     Stream_write_string(output, "\\t");
1427     break;
1428     case 0xa:
1429     /* line feed (new line) */
1430     done = true;
1431     break;
1432 siliconforks 317 /* IE doesn't support this */
1433     /*
1434 siliconforks 179 case 0xb:
1435     Stream_write_string(output, "\\v");
1436     break;
1437 siliconforks 317 */
1438 siliconforks 179 case 0xc:
1439     /* form feed */
1440     Stream_write_string(output, "\\f");
1441     break;
1442     case 0xd:
1443     /* carriage return */
1444     done = true;
1445     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1446     i++;
1447     }
1448     break;
1449     case '"':
1450     Stream_write_string(output, "\\\"");
1451     break;
1452     case '\\':
1453     Stream_write_string(output, "\\\\");
1454     break;
1455     case '&':
1456     Stream_write_string(output, "&amp;");
1457     break;
1458     case '<':
1459     Stream_write_string(output, "&lt;");
1460     break;
1461     case '>':
1462     Stream_write_string(output, "&gt;");
1463     break;
1464     case 0x2028:
1465     case 0x2029:
1466     done = true;
1467     break;
1468     default:
1469     if (32 <= c && c <= 126) {
1470     Stream_write_char(output, c);
1471     }
1472     else {
1473     Stream_printf(output, "&#%d;", c);
1474     }
1475     break;
1476     }
1477 siliconforks 95 i++;
1478 siliconforks 179 if (i >= num_characters) {
1479     done = true;
1480     }
1481 siliconforks 95 }
1482 siliconforks 179 Stream_write_char(output, '"');
1483 siliconforks 95 }
1484     }
1485 siliconforks 179 Stream_write_string(output, "]");
1486 siliconforks 2 }
1487 siliconforks 116
1488     void jscoverage_copy_resources(const char * destination_directory) {
1489     copy_resource("jscoverage.html", destination_directory);
1490     copy_resource("jscoverage.css", destination_directory);
1491     copy_resource("jscoverage.js", destination_directory);
1492 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1493 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1494 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1495 siliconforks 116 }
1496    
1497     /*
1498     coverage reports
1499     */
1500    
1501     struct FileCoverageList {
1502     FileCoverage * file_coverage;
1503     struct FileCoverageList * next;
1504     };
1505    
1506     struct Coverage {
1507     JSHashTable * coverage_table;
1508     struct FileCoverageList * coverage_list;
1509     };
1510    
1511     static int compare_strings(const void * p1, const void * p2) {
1512     return strcmp(p1, p2) == 0;
1513     }
1514    
1515     Coverage * Coverage_new(void) {
1516     Coverage * result = xmalloc(sizeof(Coverage));
1517     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1518     if (result->coverage_table == NULL) {
1519     fatal("cannot create hash table");
1520     }
1521     result->coverage_list = NULL;
1522     return result;
1523     }
1524    
1525     void Coverage_delete(Coverage * coverage) {
1526     JS_HashTableDestroy(coverage->coverage_table);
1527     struct FileCoverageList * p = coverage->coverage_list;
1528     while (p != NULL) {
1529 siliconforks 179 free(p->file_coverage->coverage_lines);
1530     if (p->file_coverage->source_lines != NULL) {
1531     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1532     free(p->file_coverage->source_lines[i]);
1533     }
1534     free(p->file_coverage->source_lines);
1535     }
1536 siliconforks 116 free(p->file_coverage->id);
1537     free(p->file_coverage);
1538     struct FileCoverageList * q = p;
1539     p = p->next;
1540     free(q);
1541     }
1542     free(coverage);
1543     }
1544    
1545     struct EnumeratorArg {
1546     CoverageForeachFunction f;
1547     void * p;
1548     };
1549    
1550     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1551     struct EnumeratorArg * enumerator_arg = arg;
1552     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1553     return 0;
1554     }
1555    
1556     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1557     struct EnumeratorArg enumerator_arg;
1558     enumerator_arg.f = f;
1559     enumerator_arg.p = p;
1560     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1561     }
1562    
1563     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1564 siliconforks 336 int result = 0;
1565    
1566 siliconforks 116 jschar * base = js_InflateString(context, (char *) json, &length);
1567     if (base == NULL) {
1568     fatal("out of memory");
1569     }
1570    
1571     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1572     parenthesized_json[0] = '(';
1573     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1574     parenthesized_json[length + 1] = ')';
1575    
1576     JS_free(context, base);
1577    
1578 siliconforks 336 JSParseContext parse_context;
1579     if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1580     free(parenthesized_json);
1581     return -1;
1582 siliconforks 116 }
1583 siliconforks 336 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1584 siliconforks 116 free(parenthesized_json);
1585     if (root == NULL) {
1586 siliconforks 336 result = -1;
1587     goto done;
1588 siliconforks 116 }
1589    
1590     /* root node must be TOK_LC */
1591     if (root->pn_type != TOK_LC) {
1592 siliconforks 336 result = -1;
1593     goto done;
1594 siliconforks 116 }
1595     JSParseNode * semi = root->pn_u.list.head;
1596    
1597     /* the list must be TOK_SEMI and it must contain only one element */
1598     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1599 siliconforks 336 result = -1;
1600     goto done;
1601 siliconforks 116 }
1602     JSParseNode * parenthesized = semi->pn_kid;
1603    
1604     /* this must be a parenthesized expression */
1605     if (parenthesized->pn_type != TOK_RP) {
1606 siliconforks 336 result = -1;
1607     goto done;
1608 siliconforks 116 }
1609     JSParseNode * object = parenthesized->pn_kid;
1610    
1611     /* this must be an object literal */
1612     if (object->pn_type != TOK_RC) {
1613 siliconforks 336 result = -1;
1614     goto done;
1615 siliconforks 116 }
1616    
1617     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1618     /* every element of this list must be TOK_COLON */
1619     if (p->pn_type != TOK_COLON) {
1620 siliconforks 336 result = -1;
1621     goto done;
1622 siliconforks 116 }
1623    
1624     /* the key must be a string representing the file */
1625     JSParseNode * key = p->pn_left;
1626     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1627 siliconforks 336 result = -1;
1628     goto done;
1629 siliconforks 116 }
1630     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1631    
1632     /* the value must be an object literal OR an array */
1633     JSParseNode * value = p->pn_right;
1634     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1635 siliconforks 336 result = -1;
1636     goto done;
1637 siliconforks 116 }
1638    
1639     JSParseNode * array = NULL;
1640     JSParseNode * source = NULL;
1641     if (value->pn_type == TOK_RB) {
1642     /* an array */
1643     array = value;
1644     }
1645     else if (value->pn_type == TOK_RC) {
1646     /* an object literal */
1647     if (value->pn_count != 2) {
1648 siliconforks 336 result = -1;
1649     goto done;
1650 siliconforks 116 }
1651     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1652     if (element->pn_type != TOK_COLON) {
1653 siliconforks 336 result = -1;
1654     goto done;
1655 siliconforks 116 }
1656     JSParseNode * left = element->pn_left;
1657     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1658 siliconforks 336 result = -1;
1659     goto done;
1660 siliconforks 116 }
1661     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1662     if (strcmp(s, "coverage") == 0) {
1663     array = element->pn_right;
1664     if (array->pn_type != TOK_RB) {
1665 siliconforks 336 result = -1;
1666     goto done;
1667 siliconforks 116 }
1668     }
1669     else if (strcmp(s, "source") == 0) {
1670     source = element->pn_right;
1671 siliconforks 179 if (source->pn_type != TOK_RB) {
1672 siliconforks 336 result = -1;
1673     goto done;
1674 siliconforks 116 }
1675     }
1676     else {
1677 siliconforks 336 result = -1;
1678     goto done;
1679 siliconforks 116 }
1680     }
1681     }
1682     else {
1683 siliconforks 336 result = -1;
1684     goto done;
1685 siliconforks 116 }
1686    
1687     if (array == NULL) {
1688 siliconforks 336 result = -1;
1689     goto done;
1690 siliconforks 116 }
1691    
1692     /* look up the file in the coverage table */
1693     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1694     if (file_coverage == NULL) {
1695     /* not there: create a new one */
1696     char * id = xstrdup(id_bytes);
1697     file_coverage = xmalloc(sizeof(FileCoverage));
1698     file_coverage->id = id;
1699 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1700     file_coverage->coverage_lines = xnew(int, array->pn_count);
1701 siliconforks 245 file_coverage->source_lines = NULL;
1702 siliconforks 116
1703     /* set coverage for all lines */
1704     uint32 i = 0;
1705     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1706     if (element->pn_type == TOK_NUMBER) {
1707 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1708 siliconforks 116 }
1709     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1710 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1711 siliconforks 116 }
1712     else {
1713 siliconforks 336 result = -1;
1714     goto done;
1715 siliconforks 116 }
1716     }
1717     assert(i == array->pn_count);
1718    
1719     /* add to the hash table */
1720     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1721     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1722     coverage_list->file_coverage = file_coverage;
1723     coverage_list->next = coverage->coverage_list;
1724     coverage->coverage_list = coverage_list;
1725     }
1726     else {
1727     /* sanity check */
1728     assert(strcmp(file_coverage->id, id_bytes) == 0);
1729 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1730 siliconforks 336 result = -2;
1731     goto done;
1732 siliconforks 116 }
1733    
1734     /* merge the coverage */
1735     uint32 i = 0;
1736     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1737     if (element->pn_type == TOK_NUMBER) {
1738 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1739 siliconforks 336 result = -2;
1740     goto done;
1741 siliconforks 116 }
1742 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1743 siliconforks 116 }
1744     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1745 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1746 siliconforks 336 result = -2;
1747     goto done;
1748 siliconforks 116 }
1749     }
1750     else {
1751 siliconforks 336 result = -1;
1752     goto done;
1753 siliconforks 116 }
1754     }
1755     assert(i == array->pn_count);
1756 siliconforks 245 }
1757 siliconforks 116
1758 siliconforks 245 /* if this JSON file has source, use it */
1759     if (file_coverage->source_lines == NULL && source != NULL) {
1760     file_coverage->num_source_lines = source->pn_count;
1761     file_coverage->source_lines = xnew(char *, source->pn_count);
1762     uint32 i = 0;
1763     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1764     if (element->pn_type != TOK_STRING) {
1765 siliconforks 336 result = -1;
1766     goto done;
1767 siliconforks 179 }
1768 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1769 siliconforks 116 }
1770 siliconforks 245 assert(i == source->pn_count);
1771 siliconforks 116 }
1772     }
1773    
1774 siliconforks 336 done:
1775     js_FinishParseContext(context, &parse_context);
1776     return result;
1777 siliconforks 116 }

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