/[jscoverage]/trunk/instrument-js.c
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Revision 246 - (hide annotations)
Sun Oct 5 18:05:42 2008 UTC (11 years ago) by siliconforks
File MIME type: text/plain
File size: 44506 byte(s)
Handle unusual whitespace in //#JSCOVERAGE_IF comments.
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     #include <jsatom.h>
30     #include <jsfun.h>
31     #include <jsinterp.h>
32     #include <jsparse.h>
33     #include <jsregexp.h>
34     #include <jsscope.h>
35     #include <jsstr.h>
36    
37 siliconforks 174 #include "encoding.h"
38 siliconforks 179 #include "global.h"
39     #include "highlight.h"
40 siliconforks 116 #include "resource-manager.h"
41 siliconforks 2 #include "util.h"
42    
43 siliconforks 240 struct IfDirective {
44     const jschar * condition_start;
45     const jschar * condition_end;
46     uint16_t start_line;
47     uint16_t end_line;
48     struct IfDirective * next;
49     };
50    
51     static bool * exclusive_directives = NULL;
52    
53 siliconforks 2 static JSRuntime * runtime = NULL;
54     static JSContext * context = NULL;
55     static JSObject * global = NULL;
56    
57     /*
58     JSParseNode objects store line numbers starting from 1.
59     The lines array stores line numbers starting from 0.
60     */
61     static const char * file_id = NULL;
62     static char * lines = NULL;
63 siliconforks 214 static uint16_t num_lines = 0;
64 siliconforks 2
65     void jscoverage_init(void) {
66     runtime = JS_NewRuntime(8L * 1024L * 1024L);
67     if (runtime == NULL) {
68     fatal("cannot create runtime");
69     }
70    
71     context = JS_NewContext(runtime, 8192);
72     if (context == NULL) {
73     fatal("cannot create context");
74     }
75    
76     global = JS_NewObject(context, NULL, NULL, NULL);
77     if (global == NULL) {
78     fatal("cannot create global object");
79     }
80    
81     if (! JS_InitStandardClasses(context, global)) {
82     fatal("cannot initialize standard classes");
83     }
84     }
85    
86     void jscoverage_cleanup(void) {
87     JS_DestroyContext(context);
88     JS_DestroyRuntime(runtime);
89     }
90    
91 siliconforks 246 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
92     for (size_t i = 0; i < num_characters; i++) {
93     jschar c = characters[i];
94     /*
95     XXX does not handle no-break space, other unicode "space separator"
96     */
97     switch (c) {
98     case 0x9:
99     case 0xB:
100     case 0xC:
101     Stream_write_char(f, c);
102     break;
103     default:
104     if (32 <= c && c <= 126) {
105     Stream_write_char(f, c);
106     }
107     else {
108     Stream_printf(f, "\\u%04x", c);
109     }
110     break;
111     }
112     }
113     }
114    
115 siliconforks 92 static void print_string(JSString * s, Stream * f) {
116 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
117     jschar * characters = JSSTRING_CHARS(s);
118     for (size_t i = 0; i < length; i++) {
119     jschar c = characters[i];
120     if (32 <= c && c <= 126) {
121     switch (c) {
122     case '"':
123     Stream_write_string(f, "\\\"");
124     break;
125     /*
126     case '\'':
127     Stream_write_string(f, "\\'");
128     break;
129     */
130     case '\\':
131     Stream_write_string(f, "\\\\");
132     break;
133     default:
134     Stream_write_char(f, c);
135     break;
136     }
137     }
138     else {
139     switch (c) {
140     case 0x8:
141     Stream_write_string(f, "\\b");
142     break;
143     case 0x9:
144     Stream_write_string(f, "\\t");
145     break;
146     case 0xa:
147     Stream_write_string(f, "\\n");
148     break;
149     case 0xb:
150     Stream_write_string(f, "\\v");
151     break;
152     case 0xc:
153     Stream_write_string(f, "\\f");
154     break;
155     case 0xd:
156     Stream_write_string(f, "\\r");
157     break;
158     default:
159     Stream_printf(f, "\\u%04x", c);
160     break;
161     }
162     }
163 siliconforks 2 }
164     }
165    
166 siliconforks 92 static void print_string_atom(JSAtom * atom, Stream * f) {
167 siliconforks 2 assert(ATOM_IS_STRING(atom));
168     JSString * s = ATOM_TO_STRING(atom);
169     print_string(s, f);
170     }
171    
172 siliconforks 174 static void print_regex(jsval value, Stream * f) {
173 siliconforks 2 assert(JSVAL_IS_STRING(value));
174     JSString * s = JSVAL_TO_STRING(value);
175 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
176     jschar * characters = JSSTRING_CHARS(s);
177     for (size_t i = 0; i < length; i++) {
178     jschar c = characters[i];
179     if (32 <= c && c <= 126) {
180     Stream_write_char(f, c);
181     }
182     else {
183     Stream_printf(f, "\\u%04x", c);
184     }
185     }
186 siliconforks 2 }
187    
188 siliconforks 92 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
189 siliconforks 2 assert(ATOM_IS_STRING(atom));
190     JSString * s = ATOM_TO_STRING(atom);
191 siliconforks 174 Stream_write_char(f, '"');
192     print_string(s, f);
193     Stream_write_char(f, '"');
194 siliconforks 2 }
195    
196     static const char * get_op(uint8 op) {
197     switch(op) {
198     case JSOP_BITOR:
199     return "|";
200     case JSOP_BITXOR:
201     return "^";
202     case JSOP_BITAND:
203     return "&";
204     case JSOP_EQ:
205     return "==";
206     case JSOP_NE:
207     return "!=";
208     case JSOP_NEW_EQ:
209     return "===";
210     case JSOP_NEW_NE:
211     return "!==";
212     case JSOP_LT:
213     return "<";
214     case JSOP_LE:
215     return "<=";
216     case JSOP_GT:
217     return ">";
218     case JSOP_GE:
219     return ">=";
220     case JSOP_LSH:
221     return "<<";
222     case JSOP_RSH:
223     return ">>";
224     case JSOP_URSH:
225     return ">>>";
226     case JSOP_ADD:
227     return "+";
228     case JSOP_SUB:
229     return "-";
230     case JSOP_MUL:
231     return "*";
232     case JSOP_DIV:
233     return "/";
234     case JSOP_MOD:
235     return "%";
236     default:
237     abort();
238     }
239     }
240    
241 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f);
242 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
243 siliconforks 2
244 siliconforks 155 enum FunctionType {
245     FUNCTION_NORMAL,
246     FUNCTION_GETTER_OR_SETTER
247     };
248    
249     static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
250 siliconforks 156 assert(node->pn_arity == PN_FUNC);
251     assert(ATOM_IS_OBJECT(node->pn_funAtom));
252     JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);
253     assert(JS_ObjectIsFunction(context, object));
254     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
255     assert(function);
256     assert(object == function->object);
257     Stream_printf(f, "%*s", indent, "");
258     if (type == FUNCTION_NORMAL) {
259     Stream_write_string(f, "function");
260     }
261 siliconforks 2
262 siliconforks 156 /* function name */
263     if (function->atom) {
264     Stream_write_char(f, ' ');
265     print_string_atom(function->atom, f);
266     }
267 siliconforks 2
268 siliconforks 156 /* function parameters */
269     Stream_write_string(f, "(");
270     JSAtom ** params = xnew(JSAtom *, function->nargs);
271     for (int i = 0; i < function->nargs; i++) {
272     /* initialize to NULL for sanity check */
273     params[i] = NULL;
274     }
275     JSScope * scope = OBJ_SCOPE(object);
276     for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {
277     if (scope_property->getter != js_GetArgument) {
278     continue;
279 siliconforks 2 }
280 siliconforks 156 assert(scope_property->flags & SPROP_HAS_SHORTID);
281     assert((uint16) scope_property->shortid < function->nargs);
282     assert(JSID_IS_ATOM(scope_property->id));
283     params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);
284     }
285     for (int i = 0; i < function->nargs; i++) {
286     assert(params[i] != NULL);
287     if (i > 0) {
288     Stream_write_string(f, ", ");
289 siliconforks 2 }
290 siliconforks 156 if (ATOM_IS_STRING(params[i])) {
291     print_string_atom(params[i], f);
292 siliconforks 2 }
293 siliconforks 156 }
294     Stream_write_string(f, ") {\n");
295     free(params);
296 siliconforks 2
297 siliconforks 156 /* function body */
298 siliconforks 240 instrument_statement(node->pn_body, f, indent + 2, false);
299 siliconforks 2
300 siliconforks 156 Stream_write_string(f, "}\n");
301 siliconforks 2 }
302    
303 siliconforks 92 static void instrument_function_call(JSParseNode * node, Stream * f) {
304 siliconforks 2 instrument_expression(node->pn_head, f);
305 siliconforks 92 Stream_write_char(f, '(');
306 siliconforks 2 for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
307     if (p != node->pn_head->pn_next) {
308 siliconforks 92 Stream_write_string(f, ", ");
309 siliconforks 2 }
310     instrument_expression(p, f);
311     }
312 siliconforks 92 Stream_write_char(f, ')');
313 siliconforks 2 }
314    
315     /*
316     See <Expressions> in jsparse.h.
317     TOK_FUNCTION is handled as a statement and as an expression.
318     TOK_DBLDOT is not handled (XML op).
319     TOK_DEFSHARP and TOK_USESHARP are not handled.
320     TOK_ANYNAME is not handled (XML op).
321     TOK_AT is not handled (XML op).
322     TOK_DBLCOLON is not handled.
323     TOK_XML* are not handled.
324     There seem to be some undocumented expressions:
325     TOK_INSTANCEOF binary
326     TOK_IN binary
327     */
328 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
329 siliconforks 2 switch (node->pn_type) {
330     case TOK_FUNCTION:
331 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
332 siliconforks 2 break;
333     case TOK_COMMA:
334     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
335     if (p != node->pn_head) {
336 siliconforks 92 Stream_write_string(f, ", ");
337 siliconforks 2 }
338     instrument_expression(p, f);
339     }
340     break;
341     case TOK_ASSIGN:
342     instrument_expression(node->pn_left, f);
343 siliconforks 92 Stream_write_char(f, ' ');
344 siliconforks 2 switch (node->pn_op) {
345     case JSOP_ADD:
346     case JSOP_SUB:
347     case JSOP_MUL:
348     case JSOP_MOD:
349     case JSOP_LSH:
350     case JSOP_RSH:
351     case JSOP_URSH:
352     case JSOP_BITAND:
353     case JSOP_BITOR:
354     case JSOP_BITXOR:
355     case JSOP_DIV:
356 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
357 siliconforks 2 break;
358     default:
359     /* do nothing - it must be a simple assignment */
360     break;
361     }
362 siliconforks 92 Stream_write_string(f, "= ");
363 siliconforks 2 instrument_expression(node->pn_right, f);
364     break;
365     case TOK_HOOK:
366     instrument_expression(node->pn_kid1, f);
367 siliconforks 92 Stream_write_string(f, "? ");
368 siliconforks 2 instrument_expression(node->pn_kid2, f);
369 siliconforks 92 Stream_write_string(f, ": ");
370 siliconforks 2 instrument_expression(node->pn_kid3, f);
371     break;
372     case TOK_OR:
373     instrument_expression(node->pn_left, f);
374 siliconforks 92 Stream_write_string(f, " || ");
375 siliconforks 2 instrument_expression(node->pn_right, f);
376     break;
377     case TOK_AND:
378     instrument_expression(node->pn_left, f);
379 siliconforks 92 Stream_write_string(f, " && ");
380 siliconforks 2 instrument_expression(node->pn_right, f);
381     break;
382     case TOK_BITOR:
383     case TOK_BITXOR:
384     case TOK_BITAND:
385     case TOK_EQOP:
386     case TOK_RELOP:
387     case TOK_SHOP:
388     case TOK_PLUS:
389     case TOK_MINUS:
390     case TOK_STAR:
391     case TOK_DIVOP:
392     switch (node->pn_arity) {
393     case PN_BINARY:
394     instrument_expression(node->pn_left, f);
395 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
396 siliconforks 2 instrument_expression(node->pn_right, f);
397     break;
398     case PN_LIST:
399     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
400     if (p != node->pn_head) {
401 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
402 siliconforks 2 }
403     instrument_expression(p, f);
404     }
405     break;
406     default:
407     abort();
408     }
409     break;
410     case TOK_UNARYOP:
411     switch (node->pn_op) {
412     case JSOP_NEG:
413 siliconforks 92 Stream_write_char(f, '-');
414 siliconforks 2 instrument_expression(node->pn_kid, f);
415     break;
416     case JSOP_POS:
417 siliconforks 92 Stream_write_char(f, '+');
418 siliconforks 2 instrument_expression(node->pn_kid, f);
419     break;
420     case JSOP_NOT:
421 siliconforks 92 Stream_write_char(f, '!');
422 siliconforks 2 instrument_expression(node->pn_kid, f);
423     break;
424     case JSOP_BITNOT:
425 siliconforks 92 Stream_write_char(f, '~');
426 siliconforks 2 instrument_expression(node->pn_kid, f);
427     break;
428     case JSOP_TYPEOF:
429 siliconforks 92 Stream_write_string(f, "typeof ");
430 siliconforks 2 instrument_expression(node->pn_kid, f);
431     break;
432     case JSOP_VOID:
433 siliconforks 92 Stream_write_string(f, "void ");
434 siliconforks 2 instrument_expression(node->pn_kid, f);
435     break;
436     default:
437     abort();
438     break;
439     }
440     break;
441     case TOK_INC:
442     case TOK_DEC:
443     /*
444     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
445     */
446     switch (node->pn_op) {
447     case JSOP_INCNAME:
448     case JSOP_INCPROP:
449     case JSOP_INCELEM:
450 siliconforks 92 Stream_write_string(f, "++");
451 siliconforks 2 instrument_expression(node->pn_kid, f);
452     break;
453     case JSOP_DECNAME:
454     case JSOP_DECPROP:
455     case JSOP_DECELEM:
456 siliconforks 92 Stream_write_string(f, "--");
457 siliconforks 2 instrument_expression(node->pn_kid, f);
458     break;
459     case JSOP_NAMEINC:
460     case JSOP_PROPINC:
461     case JSOP_ELEMINC:
462     instrument_expression(node->pn_kid, f);
463 siliconforks 92 Stream_write_string(f, "++");
464 siliconforks 2 break;
465     case JSOP_NAMEDEC:
466     case JSOP_PROPDEC:
467     case JSOP_ELEMDEC:
468     instrument_expression(node->pn_kid, f);
469 siliconforks 92 Stream_write_string(f, "--");
470 siliconforks 2 break;
471     default:
472     abort();
473     break;
474     }
475     break;
476     case TOK_NEW:
477 siliconforks 92 Stream_write_string(f, "new ");
478 siliconforks 2 instrument_function_call(node, f);
479     break;
480     case TOK_DELETE:
481 siliconforks 92 Stream_write_string(f, "delete ");
482 siliconforks 2 instrument_expression(node->pn_kid, f);
483     break;
484     case TOK_DOT:
485     /*
486     This may have originally been x['foo-bar']. Because the string 'foo-bar'
487     contains illegal characters, we have to use the subscript syntax instead of
488     the dot syntax.
489     */
490     instrument_expression(node->pn_expr, f);
491 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
492     {
493     JSString * s = ATOM_TO_STRING(node->pn_atom);
494     /* XXX - semantics changed in 1.7 */
495     if (! ATOM_KEYWORD(node->pn_atom) && js_IsIdentifier(s)) {
496 siliconforks 92 Stream_write_char(f, '.');
497 siliconforks 84 print_string_atom(node->pn_atom, f);
498     }
499     else {
500 siliconforks 92 Stream_write_char(f, '[');
501 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
502 siliconforks 92 Stream_write_char(f, ']');
503 siliconforks 84 }
504     }
505 siliconforks 2 break;
506     case TOK_LB:
507     instrument_expression(node->pn_left, f);
508 siliconforks 92 Stream_write_char(f, '[');
509 siliconforks 2 instrument_expression(node->pn_right, f);
510 siliconforks 92 Stream_write_char(f, ']');
511 siliconforks 2 break;
512     case TOK_LP:
513     instrument_function_call(node, f);
514     break;
515     case TOK_RB:
516 siliconforks 92 Stream_write_char(f, '[');
517 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
518     if (p != node->pn_head) {
519 siliconforks 92 Stream_write_string(f, ", ");
520 siliconforks 2 }
521     /* TOK_COMMA is a special case: a hole in the array */
522     if (p->pn_type != TOK_COMMA) {
523     instrument_expression(p, f);
524     }
525     }
526     if (node->pn_extra == PNX_ENDCOMMA) {
527 siliconforks 92 Stream_write_char(f, ',');
528 siliconforks 2 }
529 siliconforks 92 Stream_write_char(f, ']');
530 siliconforks 2 break;
531     case TOK_RC:
532 siliconforks 92 Stream_write_char(f, '{');
533 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
534     assert(p->pn_type == TOK_COLON);
535     if (p != node->pn_head) {
536 siliconforks 92 Stream_write_string(f, ", ");
537 siliconforks 2 }
538 siliconforks 155
539     /* check whether this is a getter or setter */
540     switch (p->pn_op) {
541     case JSOP_GETTER:
542     Stream_write_string(f, "get ");
543     instrument_expression(p->pn_left, f);
544     instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
545     break;
546     case JSOP_SETTER:
547     Stream_write_string(f, "set ");
548     instrument_expression(p->pn_left, f);
549     instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
550     break;
551     default:
552     instrument_expression(p->pn_left, f);
553     Stream_write_string(f, ": ");
554     instrument_expression(p->pn_right, f);
555     break;
556     }
557 siliconforks 2 }
558 siliconforks 92 Stream_write_char(f, '}');
559 siliconforks 2 break;
560     case TOK_RP:
561 siliconforks 92 Stream_write_char(f, '(');
562 siliconforks 2 instrument_expression(node->pn_kid, f);
563 siliconforks 92 Stream_write_char(f, ')');
564 siliconforks 2 break;
565     case TOK_NAME:
566     print_string_atom(node->pn_atom, f);
567     break;
568     case TOK_STRING:
569     print_quoted_string_atom(node->pn_atom, f);
570     break;
571     case TOK_OBJECT:
572     switch (node->pn_op) {
573     case JSOP_OBJECT:
574     /* I assume this is JSOP_REGEXP */
575     abort();
576     break;
577     case JSOP_REGEXP:
578     assert(ATOM_IS_OBJECT(node->pn_atom));
579     {
580     JSObject * object = ATOM_TO_OBJECT(node->pn_atom);
581     jsval result;
582     js_regexp_toString(context, object, 0, NULL, &result);
583 siliconforks 174 print_regex(result, f);
584 siliconforks 2 }
585     break;
586     default:
587     abort();
588     break;
589     }
590     break;
591     case TOK_NUMBER:
592     /*
593     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
594     2^(-52) = 2.22 x 10^(-16)
595     Thus there are 16 significant digits.
596     To keep the output simple, special-case zero.
597     */
598     if (node->pn_dval == 0.0) {
599 siliconforks 92 Stream_write_string(f, "0");
600 siliconforks 2 }
601     else {
602 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
603 siliconforks 2 }
604     break;
605     case TOK_PRIMARY:
606     switch (node->pn_op) {
607     case JSOP_TRUE:
608 siliconforks 92 Stream_write_string(f, "true");
609 siliconforks 2 break;
610     case JSOP_FALSE:
611 siliconforks 92 Stream_write_string(f, "false");
612 siliconforks 2 break;
613     case JSOP_NULL:
614 siliconforks 92 Stream_write_string(f, "null");
615 siliconforks 2 break;
616     case JSOP_THIS:
617 siliconforks 92 Stream_write_string(f, "this");
618 siliconforks 2 break;
619     /* jsscan.h mentions `super' ??? */
620     default:
621     abort();
622     }
623     break;
624     case TOK_INSTANCEOF:
625     instrument_expression(node->pn_left, f);
626 siliconforks 92 Stream_write_string(f, " instanceof ");
627 siliconforks 2 instrument_expression(node->pn_right, f);
628     break;
629     case TOK_IN:
630     instrument_expression(node->pn_left, f);
631 siliconforks 92 Stream_write_string(f, " in ");
632 siliconforks 2 instrument_expression(node->pn_right, f);
633     break;
634     default:
635     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
636     }
637     }
638    
639 siliconforks 92 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {
640 siliconforks 2 assert(node->pn_arity == PN_LIST);
641 siliconforks 92 Stream_printf(f, "%*s", indent, "");
642     Stream_write_string(f, "var ");
643 siliconforks 2 for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
644     assert(p->pn_type == TOK_NAME);
645     assert(p->pn_arity == PN_NAME);
646     if (p != node->pn_head) {
647 siliconforks 92 Stream_write_string(f, ", ");
648 siliconforks 2 }
649     print_string_atom(p->pn_atom, f);
650     if (p->pn_expr != NULL) {
651 siliconforks 92 Stream_write_string(f, " = ");
652 siliconforks 2 instrument_expression(p->pn_expr, f);
653     }
654     }
655     }
656    
657 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
658 siliconforks 2 switch (node->pn_type) {
659     case TOK_FUNCTION:
660 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
661 siliconforks 2 break;
662     case TOK_LC:
663     assert(node->pn_arity == PN_LIST);
664     /*
665 siliconforks 92 Stream_write_string(f, "{\n");
666 siliconforks 2 */
667     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
668 siliconforks 240 instrument_statement(p, f, indent, false);
669 siliconforks 2 }
670     /*
671 siliconforks 92 Stream_printf(f, "%*s", indent, "");
672     Stream_write_string(f, "}\n");
673 siliconforks 2 */
674     break;
675     case TOK_IF:
676 siliconforks 240 {
677 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
678 siliconforks 240
679     uint16_t line = node->pn_pos.begin.lineno;
680     if (! is_jscoverage_if) {
681     if (line > num_lines) {
682     fatal("%s: script contains more than 65,535 lines", file_id);
683     }
684     if (line >= 2 && exclusive_directives[line - 2]) {
685     is_jscoverage_if = true;
686     }
687     }
688    
689 siliconforks 92 Stream_printf(f, "%*s", indent, "");
690     Stream_write_string(f, "if (");
691 siliconforks 2 instrument_expression(node->pn_kid1, f);
692 siliconforks 92 Stream_write_string(f, ") {\n");
693 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
694     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
695     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
696     Stream_printf(f, "%*s", indent + 2, "");
697     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
698     }
699     instrument_statement(node->pn_kid2, f, indent + 2, false);
700 siliconforks 92 Stream_printf(f, "%*s", indent, "");
701     Stream_write_string(f, "}\n");
702 siliconforks 240
703     if (node->pn_kid3 || is_jscoverage_if) {
704 siliconforks 92 Stream_printf(f, "%*s", indent, "");
705     Stream_write_string(f, "else {\n");
706 siliconforks 240
707     if (is_jscoverage_if) {
708     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
709     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
710     Stream_printf(f, "%*s", indent + 2, "");
711     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
712     }
713    
714     if (node->pn_kid3) {
715     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
716     }
717    
718 siliconforks 92 Stream_printf(f, "%*s", indent, "");
719     Stream_write_string(f, "}\n");
720 siliconforks 2 }
721 siliconforks 240
722 siliconforks 2 break;
723 siliconforks 240 }
724 siliconforks 2 case TOK_SWITCH:
725     assert(node->pn_arity == PN_BINARY);
726 siliconforks 92 Stream_printf(f, "%*s", indent, "");
727     Stream_write_string(f, "switch (");
728 siliconforks 2 instrument_expression(node->pn_left, f);
729 siliconforks 92 Stream_write_string(f, ") {\n");
730 siliconforks 2 for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {
731 siliconforks 92 Stream_printf(f, "%*s", indent, "");
732 siliconforks 2 switch (p->pn_type) {
733     case TOK_CASE:
734 siliconforks 92 Stream_write_string(f, "case ");
735 siliconforks 2 instrument_expression(p->pn_left, f);
736 siliconforks 92 Stream_write_string(f, ":\n");
737 siliconforks 2 break;
738     case TOK_DEFAULT:
739 siliconforks 92 Stream_write_string(f, "default:\n");
740 siliconforks 2 break;
741     default:
742     abort();
743     break;
744     }
745 siliconforks 240 instrument_statement(p->pn_right, f, indent + 2, false);
746 siliconforks 2 }
747 siliconforks 92 Stream_printf(f, "%*s", indent, "");
748     Stream_write_string(f, "}\n");
749 siliconforks 2 break;
750     case TOK_CASE:
751     case TOK_DEFAULT:
752     abort();
753     break;
754     case TOK_WHILE:
755     assert(node->pn_arity == PN_BINARY);
756 siliconforks 92 Stream_printf(f, "%*s", indent, "");
757     Stream_write_string(f, "while (");
758 siliconforks 2 instrument_expression(node->pn_left, f);
759 siliconforks 92 Stream_write_string(f, ") {\n");
760 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
761 siliconforks 92 Stream_write_string(f, "}\n");
762 siliconforks 2 break;
763     case TOK_DO:
764     assert(node->pn_arity == PN_BINARY);
765 siliconforks 92 Stream_printf(f, "%*s", indent, "");
766     Stream_write_string(f, "do {\n");
767 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
768 siliconforks 92 Stream_write_string(f, "}\n");
769     Stream_printf(f, "%*s", indent, "");
770     Stream_write_string(f, "while (");
771 siliconforks 2 instrument_expression(node->pn_right, f);
772 siliconforks 92 Stream_write_string(f, ");\n");
773 siliconforks 2 break;
774     case TOK_FOR:
775     assert(node->pn_arity == PN_BINARY);
776 siliconforks 92 Stream_printf(f, "%*s", indent, "");
777     Stream_write_string(f, "for (");
778 siliconforks 2 switch (node->pn_left->pn_type) {
779     case TOK_IN:
780     /* for/in */
781     assert(node->pn_left->pn_arity == PN_BINARY);
782     switch (node->pn_left->pn_left->pn_type) {
783     case TOK_VAR:
784     instrument_var_statement(node->pn_left->pn_left, f, 0);
785     break;
786     case TOK_NAME:
787     instrument_expression(node->pn_left->pn_left, f);
788     break;
789     default:
790     /* this is undocumented: for (x.value in y) */
791     instrument_expression(node->pn_left->pn_left, f);
792     break;
793     /*
794     default:
795     fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);
796     abort();
797     break;
798     */
799     }
800 siliconforks 92 Stream_write_string(f, " in ");
801 siliconforks 2 instrument_expression(node->pn_left->pn_right, f);
802     break;
803     case TOK_RESERVED:
804     /* for (;;) */
805     assert(node->pn_left->pn_arity == PN_TERNARY);
806     if (node->pn_left->pn_kid1) {
807     if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {
808     instrument_var_statement(node->pn_left->pn_kid1, f, 0);
809     }
810     else {
811     instrument_expression(node->pn_left->pn_kid1, f);
812     }
813     }
814 siliconforks 92 Stream_write_string(f, ";");
815 siliconforks 2 if (node->pn_left->pn_kid2) {
816 siliconforks 92 Stream_write_char(f, ' ');
817 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
818     }
819 siliconforks 92 Stream_write_string(f, ";");
820 siliconforks 2 if (node->pn_left->pn_kid3) {
821 siliconforks 92 Stream_write_char(f, ' ');
822 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
823     }
824     break;
825     default:
826     abort();
827     break;
828     }
829 siliconforks 92 Stream_write_string(f, ") {\n");
830 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
831 siliconforks 92 Stream_write_string(f, "}\n");
832 siliconforks 2 break;
833     case TOK_THROW:
834     assert(node->pn_arity == PN_UNARY);
835 siliconforks 92 Stream_printf(f, "%*s", indent, "");
836     Stream_write_string(f, "throw ");
837 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
838 siliconforks 92 Stream_write_string(f, ";\n");
839 siliconforks 2 break;
840     case TOK_TRY:
841 siliconforks 92 Stream_printf(f, "%*s", indent, "");
842     Stream_write_string(f, "try {\n");
843 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
844 siliconforks 92 Stream_printf(f, "%*s", indent, "");
845     Stream_write_string(f, "}\n");
846 siliconforks 2 {
847     for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {
848     assert(catch->pn_type == TOK_CATCH);
849 siliconforks 92 Stream_printf(f, "%*s", indent, "");
850     Stream_write_string(f, "catch (");
851 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
852     print_string_atom(catch->pn_kid1->pn_atom, f);
853     if (catch->pn_kid1->pn_expr) {
854 siliconforks 92 Stream_write_string(f, " if ");
855 siliconforks 2 instrument_expression(catch->pn_kid1->pn_expr, f);
856     }
857 siliconforks 92 Stream_write_string(f, ") {\n");
858 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
859 siliconforks 92 Stream_printf(f, "%*s", indent, "");
860     Stream_write_string(f, "}\n");
861 siliconforks 2 }
862     }
863     if (node->pn_kid3) {
864 siliconforks 92 Stream_printf(f, "%*s", indent, "");
865     Stream_write_string(f, "finally {\n");
866 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
867 siliconforks 92 Stream_printf(f, "%*s", indent, "");
868     Stream_write_string(f, "}\n");
869 siliconforks 2 }
870     break;
871     case TOK_CATCH:
872     abort();
873     break;
874     case TOK_BREAK:
875     case TOK_CONTINUE:
876     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
877 siliconforks 92 Stream_printf(f, "%*s", indent, "");
878     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
879 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
880     if (atom != NULL) {
881 siliconforks 92 Stream_write_char(f, ' ');
882 siliconforks 2 print_string_atom(node->pn_atom, f);
883     }
884 siliconforks 92 Stream_write_string(f, ";\n");
885 siliconforks 2 break;
886     case TOK_WITH:
887     assert(node->pn_arity == PN_BINARY);
888 siliconforks 92 Stream_printf(f, "%*s", indent, "");
889     Stream_write_string(f, "with (");
890 siliconforks 2 instrument_expression(node->pn_left, f);
891 siliconforks 92 Stream_write_string(f, ") {\n");
892 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
893 siliconforks 92 Stream_printf(f, "%*s", indent, "");
894     Stream_write_string(f, "}\n");
895 siliconforks 2 break;
896     case TOK_VAR:
897     instrument_var_statement(node, f, indent);
898 siliconforks 92 Stream_write_string(f, ";\n");
899 siliconforks 2 break;
900     case TOK_RETURN:
901     assert(node->pn_arity == PN_UNARY);
902 siliconforks 92 Stream_printf(f, "%*s", indent, "");
903     Stream_write_string(f, "return");
904 siliconforks 2 if (node->pn_kid != NULL) {
905 siliconforks 92 Stream_write_char(f, ' ');
906 siliconforks 2 instrument_expression(node->pn_kid, f);
907     }
908 siliconforks 92 Stream_write_string(f, ";\n");
909 siliconforks 2 break;
910     case TOK_SEMI:
911     assert(node->pn_arity == PN_UNARY);
912 siliconforks 92 Stream_printf(f, "%*s", indent, "");
913 siliconforks 2 if (node->pn_kid != NULL) {
914     instrument_expression(node->pn_kid, f);
915     }
916 siliconforks 92 Stream_write_string(f, ";\n");
917 siliconforks 2 break;
918     case TOK_COLON:
919     assert(node->pn_arity == PN_NAME);
920     /*
921     This one is tricky: can't output instrumentation between the label and the
922     statement it's supposed to label ...
923     */
924 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
925 siliconforks 2 print_string_atom(node->pn_atom, f);
926 siliconforks 92 Stream_write_string(f, ":\n");
927 siliconforks 2 /*
928     ... use output_statement instead of instrument_statement.
929     */
930 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
931 siliconforks 2 break;
932     default:
933     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
934     }
935     }
936    
937     /*
938     See <Statements> in jsparse.h.
939     TOK_FUNCTION is handled as a statement and as an expression.
940     TOK_EXPORT, TOK_IMPORT are not handled.
941     */
942 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
943 siliconforks 2 if (node->pn_type != TOK_LC) {
944 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
945     if (line > num_lines) {
946     fatal("%s: script contains more than 65,535 lines", file_id);
947     }
948    
949 siliconforks 2 /* the root node has line number 0 */
950     if (line != 0) {
951 siliconforks 92 Stream_printf(f, "%*s", indent, "");
952     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
953 siliconforks 2 lines[line - 1] = 1;
954     }
955     }
956 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
957 siliconforks 2 }
958    
959 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
960     const jschar * characters_end = characters + line_end;
961     const jschar * cp = characters + line_start;
962     const char * bp = prefix;
963     for (;;) {
964     if (*bp == '\0') {
965     return true;
966     }
967     else if (cp == characters_end) {
968     return false;
969     }
970     else if (*cp != *bp) {
971     return false;
972     }
973     bp++;
974     cp++;
975     }
976     }
977    
978 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
979     /* XXX - other Unicode space */
980     const jschar * end = characters + line_end;
981     for (const jschar * p = characters + line_start; p < end; p++) {
982     jschar c = *p;
983     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
984     continue;
985     }
986     else {
987     return false;
988     }
989     }
990     return true;
991     }
992    
993 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
994 siliconforks 2 file_id = id;
995    
996     /* scan the javascript */
997 siliconforks 179 JSTokenStream * token_stream = js_NewTokenStream(context, characters, num_characters, NULL, 1, NULL);
998 siliconforks 2 if (token_stream == NULL) {
999     fatal("cannot create token stream from file: %s", file_id);
1000     }
1001    
1002     /* parse the javascript */
1003     JSParseNode * node = js_ParseTokenStream(context, global, token_stream);
1004     if (node == NULL) {
1005     fatal("parse error in file: %s", file_id);
1006     }
1007 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1008 siliconforks 2 lines = xmalloc(num_lines);
1009 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1010 siliconforks 2 lines[i] = 0;
1011     }
1012    
1013 siliconforks 240 /* search code for conditionals */
1014     exclusive_directives = xnew(bool, num_lines);
1015     for (unsigned int i = 0; i < num_lines; i++) {
1016     exclusive_directives[i] = false;
1017 siliconforks 2 }
1018    
1019 siliconforks 157 bool has_conditionals = false;
1020 siliconforks 240 struct IfDirective * if_directives = NULL;
1021 siliconforks 157 size_t line_number = 0;
1022     size_t i = 0;
1023 siliconforks 176 while (i < num_characters) {
1024 siliconforks 240 if (line_number == UINT16_MAX) {
1025     fatal("%s: script has more than 65,535 lines", file_id);
1026     }
1027 siliconforks 157 line_number++;
1028     size_t line_start = i;
1029 siliconforks 190 jschar c;
1030     bool done = false;
1031     while (! done && i < num_characters) {
1032     c = characters[i];
1033     switch (c) {
1034     case '\r':
1035     case '\n':
1036     case 0x2028:
1037     case 0x2029:
1038     done = true;
1039     break;
1040     default:
1041     i++;
1042     }
1043 siliconforks 157 }
1044     size_t line_end = i;
1045 siliconforks 176 if (i < num_characters) {
1046 siliconforks 190 i++;
1047     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1048 siliconforks 157 i++;
1049     }
1050     }
1051 siliconforks 240
1052 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1053 siliconforks 240 has_conditionals = true;
1054    
1055     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1056     exclusive_directives[line_number - 1] = true;
1057 siliconforks 157 }
1058 siliconforks 240 else {
1059     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1060     if_directive->condition_start = characters + line_start + 16;
1061     if_directive->condition_end = characters + line_end;
1062     if_directive->start_line = line_number;
1063     if_directive->end_line = 0;
1064     if_directive->next = if_directives;
1065     if_directives = if_directive;
1066 siliconforks 190 }
1067 siliconforks 157 }
1068 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1069 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1070     if (p->end_line == 0) {
1071     p->end_line = line_number;
1072     break;
1073     }
1074     }
1075 siliconforks 157 }
1076     }
1077    
1078 siliconforks 240 /*
1079     An instrumented JavaScript file has 4 sections:
1080     1. initialization
1081     2. instrumented source code
1082     3. conditionals
1083     4. original source code
1084     */
1085    
1086     Stream * instrumented = Stream_new(0);
1087     instrument_statement(node, instrumented, 0, false);
1088    
1089     /* write line number info to the output */
1090     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1091     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1092     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1093     Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1094     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1095     for (int i = 0; i < num_lines; i++) {
1096     if (lines[i]) {
1097     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1098     }
1099     }
1100     Stream_write_string(output, "}\n");
1101     free(lines);
1102     lines = NULL;
1103     free(exclusive_directives);
1104     exclusive_directives = NULL;
1105    
1106     /* conditionals */
1107     if (has_conditionals) {
1108     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1109     }
1110    
1111     /* copy the instrumented source code to the output */
1112     Stream_write(output, instrumented->data, instrumented->length);
1113    
1114     /* conditionals */
1115     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1116     Stream_write_string(output, "if (!(");
1117 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1118 siliconforks 240 Stream_write_string(output, ")) {\n");
1119     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1120     Stream_write_string(output, "}\n");
1121     }
1122    
1123     /* free */
1124     while (if_directives != NULL) {
1125     struct IfDirective * if_directive = if_directives;
1126     if_directives = if_directives->next;
1127     free(if_directive);
1128     }
1129    
1130 siliconforks 95 /* copy the original source to the output */
1131 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1132     jscoverage_write_source(id, characters, num_characters, output);
1133     Stream_printf(output, ";\n");
1134 siliconforks 95
1135 siliconforks 179 Stream_delete(instrumented);
1136    
1137     file_id = NULL;
1138     }
1139    
1140     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1141     Stream_write_string(output, "[");
1142     if (jscoverage_highlight) {
1143     Stream * highlighted_stream = Stream_new(num_characters);
1144     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1145     size_t i = 0;
1146     while (i < highlighted_stream->length) {
1147     if (i > 0) {
1148     Stream_write_char(output, ',');
1149     }
1150    
1151     Stream_write_char(output, '"');
1152     bool done = false;
1153     while (! done) {
1154     char c = highlighted_stream->data[i];
1155     switch (c) {
1156     case 0x8:
1157     /* backspace */
1158     Stream_write_string(output, "\\b");
1159     break;
1160     case 0x9:
1161     /* horizontal tab */
1162     Stream_write_string(output, "\\t");
1163     break;
1164     case 0xa:
1165     /* line feed (new line) */
1166     done = true;
1167     break;
1168     case 0xb:
1169     /* vertical tab */
1170     Stream_write_string(output, "\\v");
1171     break;
1172     case 0xc:
1173     /* form feed */
1174     Stream_write_string(output, "\\f");
1175     break;
1176     case 0xd:
1177     /* carriage return */
1178     done = true;
1179     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1180     i++;
1181     }
1182     break;
1183     case '"':
1184     Stream_write_string(output, "\\\"");
1185     break;
1186     case '\\':
1187     Stream_write_string(output, "\\\\");
1188     break;
1189     default:
1190     Stream_write_char(output, c);
1191     break;
1192     }
1193 siliconforks 95 i++;
1194 siliconforks 179 if (i >= highlighted_stream->length) {
1195     done = true;
1196 siliconforks 95 }
1197     }
1198 siliconforks 179 Stream_write_char(output, '"');
1199     }
1200     Stream_delete(highlighted_stream);
1201     }
1202     else {
1203     size_t i = 0;
1204     while (i < num_characters) {
1205     if (i > 0) {
1206     Stream_write_char(output, ',');
1207     }
1208    
1209     Stream_write_char(output, '"');
1210     bool done = false;
1211     while (! done) {
1212     jschar c = characters[i];
1213     switch (c) {
1214     case 0x8:
1215     /* backspace */
1216     Stream_write_string(output, "\\b");
1217     break;
1218     case 0x9:
1219     /* horizontal tab */
1220     Stream_write_string(output, "\\t");
1221     break;
1222     case 0xa:
1223     /* line feed (new line) */
1224     done = true;
1225     break;
1226     case 0xb:
1227     /* vertical tab */
1228     Stream_write_string(output, "\\v");
1229     break;
1230     case 0xc:
1231     /* form feed */
1232     Stream_write_string(output, "\\f");
1233     break;
1234     case 0xd:
1235     /* carriage return */
1236     done = true;
1237     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1238     i++;
1239     }
1240     break;
1241     case '"':
1242     Stream_write_string(output, "\\\"");
1243     break;
1244     case '\\':
1245     Stream_write_string(output, "\\\\");
1246     break;
1247     case '&':
1248     Stream_write_string(output, "&amp;");
1249     break;
1250     case '<':
1251     Stream_write_string(output, "&lt;");
1252     break;
1253     case '>':
1254     Stream_write_string(output, "&gt;");
1255     break;
1256     case 0x2028:
1257     case 0x2029:
1258     done = true;
1259     break;
1260     default:
1261     if (32 <= c && c <= 126) {
1262     Stream_write_char(output, c);
1263     }
1264     else {
1265     Stream_printf(output, "&#%d;", c);
1266     }
1267     break;
1268     }
1269 siliconforks 95 i++;
1270 siliconforks 179 if (i >= num_characters) {
1271     done = true;
1272     }
1273 siliconforks 95 }
1274 siliconforks 179 Stream_write_char(output, '"');
1275 siliconforks 95 }
1276     }
1277 siliconforks 179 Stream_write_string(output, "]");
1278 siliconforks 2 }
1279 siliconforks 116
1280     void jscoverage_copy_resources(const char * destination_directory) {
1281     copy_resource("jscoverage.html", destination_directory);
1282     copy_resource("jscoverage.css", destination_directory);
1283     copy_resource("jscoverage.js", destination_directory);
1284 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1285 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1286 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1287 siliconforks 116 }
1288    
1289     /*
1290     coverage reports
1291     */
1292    
1293     struct FileCoverageList {
1294     FileCoverage * file_coverage;
1295     struct FileCoverageList * next;
1296     };
1297    
1298     struct Coverage {
1299     JSHashTable * coverage_table;
1300     struct FileCoverageList * coverage_list;
1301     };
1302    
1303     static int compare_strings(const void * p1, const void * p2) {
1304     return strcmp(p1, p2) == 0;
1305     }
1306    
1307     Coverage * Coverage_new(void) {
1308     Coverage * result = xmalloc(sizeof(Coverage));
1309     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1310     if (result->coverage_table == NULL) {
1311     fatal("cannot create hash table");
1312     }
1313     result->coverage_list = NULL;
1314     return result;
1315     }
1316    
1317     void Coverage_delete(Coverage * coverage) {
1318     JS_HashTableDestroy(coverage->coverage_table);
1319     struct FileCoverageList * p = coverage->coverage_list;
1320     while (p != NULL) {
1321 siliconforks 179 free(p->file_coverage->coverage_lines);
1322     if (p->file_coverage->source_lines != NULL) {
1323     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1324     free(p->file_coverage->source_lines[i]);
1325     }
1326     free(p->file_coverage->source_lines);
1327     }
1328 siliconforks 116 free(p->file_coverage->id);
1329     free(p->file_coverage);
1330     struct FileCoverageList * q = p;
1331     p = p->next;
1332     free(q);
1333     }
1334     free(coverage);
1335     }
1336    
1337     struct EnumeratorArg {
1338     CoverageForeachFunction f;
1339     void * p;
1340     };
1341    
1342     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1343     struct EnumeratorArg * enumerator_arg = arg;
1344     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1345     return 0;
1346     }
1347    
1348     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1349     struct EnumeratorArg enumerator_arg;
1350     enumerator_arg.f = f;
1351     enumerator_arg.p = p;
1352     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1353     }
1354    
1355     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1356     jschar * base = js_InflateString(context, (char *) json, &length);
1357     if (base == NULL) {
1358     fatal("out of memory");
1359     }
1360    
1361     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1362     parenthesized_json[0] = '(';
1363     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1364     parenthesized_json[length + 1] = ')';
1365    
1366     JS_free(context, base);
1367    
1368     JSTokenStream * token_stream = js_NewTokenStream(context, parenthesized_json, length + 2, NULL, 1, NULL);
1369     if (token_stream == NULL) {
1370     fatal("cannot create token stream");
1371     }
1372    
1373     JSParseNode * root = js_ParseTokenStream(context, global, token_stream);
1374     free(parenthesized_json);
1375     if (root == NULL) {
1376     return -1;
1377     }
1378    
1379     /* root node must be TOK_LC */
1380     if (root->pn_type != TOK_LC) {
1381     return -1;
1382     }
1383     JSParseNode * semi = root->pn_u.list.head;
1384    
1385     /* the list must be TOK_SEMI and it must contain only one element */
1386     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1387     return -1;
1388     }
1389     JSParseNode * parenthesized = semi->pn_kid;
1390    
1391     /* this must be a parenthesized expression */
1392     if (parenthesized->pn_type != TOK_RP) {
1393     return -1;
1394     }
1395     JSParseNode * object = parenthesized->pn_kid;
1396    
1397     /* this must be an object literal */
1398     if (object->pn_type != TOK_RC) {
1399     return -1;
1400     }
1401    
1402     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1403     /* every element of this list must be TOK_COLON */
1404     if (p->pn_type != TOK_COLON) {
1405     return -1;
1406     }
1407    
1408     /* the key must be a string representing the file */
1409     JSParseNode * key = p->pn_left;
1410     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1411     return -1;
1412     }
1413     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1414    
1415     /* the value must be an object literal OR an array */
1416     JSParseNode * value = p->pn_right;
1417     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1418     return -1;
1419     }
1420    
1421     JSParseNode * array = NULL;
1422     JSParseNode * source = NULL;
1423     if (value->pn_type == TOK_RB) {
1424     /* an array */
1425     array = value;
1426     }
1427     else if (value->pn_type == TOK_RC) {
1428     /* an object literal */
1429     if (value->pn_count != 2) {
1430     return -1;
1431     }
1432     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1433     if (element->pn_type != TOK_COLON) {
1434     return -1;
1435     }
1436     JSParseNode * left = element->pn_left;
1437     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1438     return -1;
1439     }
1440     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1441     if (strcmp(s, "coverage") == 0) {
1442     array = element->pn_right;
1443     if (array->pn_type != TOK_RB) {
1444     return -1;
1445     }
1446     }
1447     else if (strcmp(s, "source") == 0) {
1448     source = element->pn_right;
1449 siliconforks 179 if (source->pn_type != TOK_RB) {
1450 siliconforks 116 return -1;
1451     }
1452     }
1453     else {
1454     return -1;
1455     }
1456     }
1457     }
1458     else {
1459     return -1;
1460     }
1461    
1462     if (array == NULL) {
1463     return -1;
1464     }
1465    
1466     /* look up the file in the coverage table */
1467     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1468     if (file_coverage == NULL) {
1469     /* not there: create a new one */
1470     char * id = xstrdup(id_bytes);
1471     file_coverage = xmalloc(sizeof(FileCoverage));
1472     file_coverage->id = id;
1473 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1474     file_coverage->coverage_lines = xnew(int, array->pn_count);
1475 siliconforks 245 file_coverage->source_lines = NULL;
1476 siliconforks 116
1477     /* set coverage for all lines */
1478     uint32 i = 0;
1479     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1480     if (element->pn_type == TOK_NUMBER) {
1481 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1482 siliconforks 116 }
1483     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1484 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1485 siliconforks 116 }
1486     else {
1487     return -1;
1488     }
1489     }
1490     assert(i == array->pn_count);
1491    
1492     /* add to the hash table */
1493     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1494     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1495     coverage_list->file_coverage = file_coverage;
1496     coverage_list->next = coverage->coverage_list;
1497     coverage->coverage_list = coverage_list;
1498     }
1499     else {
1500     /* sanity check */
1501     assert(strcmp(file_coverage->id, id_bytes) == 0);
1502 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1503 siliconforks 116 return -2;
1504     }
1505    
1506     /* merge the coverage */
1507     uint32 i = 0;
1508     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1509     if (element->pn_type == TOK_NUMBER) {
1510 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1511 siliconforks 116 return -2;
1512     }
1513 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1514 siliconforks 116 }
1515     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1516 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1517 siliconforks 116 return -2;
1518     }
1519     }
1520     else {
1521     return -1;
1522     }
1523     }
1524     assert(i == array->pn_count);
1525 siliconforks 245 }
1526 siliconforks 116
1527 siliconforks 245 /* if this JSON file has source, use it */
1528     if (file_coverage->source_lines == NULL && source != NULL) {
1529     file_coverage->num_source_lines = source->pn_count;
1530     file_coverage->source_lines = xnew(char *, source->pn_count);
1531     uint32 i = 0;
1532     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1533     if (element->pn_type != TOK_STRING) {
1534     return -1;
1535 siliconforks 179 }
1536 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1537 siliconforks 116 }
1538 siliconforks 245 assert(i == source->pn_count);
1539 siliconforks 116 }
1540     }
1541    
1542     return 0;
1543     }

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