/[jscoverage]/trunk/instrument-js.c
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Revision 369 - (hide annotations)
Mon Oct 27 20:33:57 2008 UTC (10 years, 11 months ago) by siliconforks
File MIME type: text/plain
File size: 51839 byte(s)
Handle versions specified as integers (`180') and decimal numbers (`1.8').
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 351 #include <jsemit.h>
32 siliconforks 284 #include <jsexn.h>
33 siliconforks 2 #include <jsfun.h>
34     #include <jsinterp.h>
35 siliconforks 339 #include <jsiter.h>
36 siliconforks 2 #include <jsparse.h>
37     #include <jsregexp.h>
38     #include <jsscope.h>
39     #include <jsstr.h>
40    
41 siliconforks 174 #include "encoding.h"
42 siliconforks 179 #include "global.h"
43     #include "highlight.h"
44 siliconforks 116 #include "resource-manager.h"
45 siliconforks 2 #include "util.h"
46    
47 siliconforks 240 struct IfDirective {
48     const jschar * condition_start;
49     const jschar * condition_end;
50     uint16_t start_line;
51     uint16_t end_line;
52     struct IfDirective * next;
53     };
54    
55 siliconforks 361 bool jscoverage_mozilla = false;
56    
57 siliconforks 240 static bool * exclusive_directives = NULL;
58    
59 siliconforks 2 static JSRuntime * runtime = NULL;
60     static JSContext * context = NULL;
61     static JSObject * global = NULL;
62 siliconforks 339 static JSVersion js_version = JSVERSION_ECMA_3;
63 siliconforks 2
64     /*
65     JSParseNode objects store line numbers starting from 1.
66     The lines array stores line numbers starting from 0.
67     */
68     static const char * file_id = NULL;
69     static char * lines = NULL;
70 siliconforks 214 static uint16_t num_lines = 0;
71 siliconforks 2
72 siliconforks 339 void jscoverage_set_js_version(const char * version) {
73 siliconforks 369 js_version = JS_StringToVersion(version);
74     if (js_version != JSVERSION_UNKNOWN) {
75     return;
76     }
77    
78     char * end;
79     js_version = (JSVersion) strtol(version, &end, 10);
80     if (end - version != strlen(version)) {
81     fatal("invalid version: %s", version);
82     }
83 siliconforks 339 }
84    
85 siliconforks 2 void jscoverage_init(void) {
86     runtime = JS_NewRuntime(8L * 1024L * 1024L);
87     if (runtime == NULL) {
88     fatal("cannot create runtime");
89     }
90    
91     context = JS_NewContext(runtime, 8192);
92     if (context == NULL) {
93     fatal("cannot create context");
94     }
95    
96 siliconforks 339 JS_SetVersion(context, js_version);
97    
98 siliconforks 2 global = JS_NewObject(context, NULL, NULL, NULL);
99     if (global == NULL) {
100     fatal("cannot create global object");
101     }
102    
103     if (! JS_InitStandardClasses(context, global)) {
104     fatal("cannot initialize standard classes");
105     }
106     }
107    
108     void jscoverage_cleanup(void) {
109     JS_DestroyContext(context);
110     JS_DestroyRuntime(runtime);
111     }
112    
113 siliconforks 246 static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
114     for (size_t i = 0; i < num_characters; i++) {
115     jschar c = characters[i];
116     /*
117     XXX does not handle no-break space, other unicode "space separator"
118     */
119     switch (c) {
120     case 0x9:
121     case 0xB:
122     case 0xC:
123     Stream_write_char(f, c);
124     break;
125     default:
126     if (32 <= c && c <= 126) {
127     Stream_write_char(f, c);
128     }
129     else {
130     Stream_printf(f, "\\u%04x", c);
131     }
132     break;
133     }
134     }
135     }
136    
137 siliconforks 92 static void print_string(JSString * s, Stream * f) {
138 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
139     jschar * characters = JSSTRING_CHARS(s);
140     for (size_t i = 0; i < length; i++) {
141     jschar c = characters[i];
142     if (32 <= c && c <= 126) {
143     switch (c) {
144     case '"':
145     Stream_write_string(f, "\\\"");
146     break;
147     /*
148     case '\'':
149     Stream_write_string(f, "\\'");
150     break;
151     */
152     case '\\':
153     Stream_write_string(f, "\\\\");
154     break;
155     default:
156     Stream_write_char(f, c);
157     break;
158     }
159     }
160     else {
161     switch (c) {
162     case 0x8:
163     Stream_write_string(f, "\\b");
164     break;
165     case 0x9:
166     Stream_write_string(f, "\\t");
167     break;
168     case 0xa:
169     Stream_write_string(f, "\\n");
170     break;
171 siliconforks 317 /* IE doesn't support this */
172     /*
173 siliconforks 174 case 0xb:
174     Stream_write_string(f, "\\v");
175     break;
176 siliconforks 317 */
177 siliconforks 174 case 0xc:
178     Stream_write_string(f, "\\f");
179     break;
180     case 0xd:
181     Stream_write_string(f, "\\r");
182     break;
183     default:
184     Stream_printf(f, "\\u%04x", c);
185     break;
186     }
187     }
188 siliconforks 2 }
189     }
190    
191 siliconforks 92 static void print_string_atom(JSAtom * atom, Stream * f) {
192 siliconforks 2 assert(ATOM_IS_STRING(atom));
193     JSString * s = ATOM_TO_STRING(atom);
194     print_string(s, f);
195     }
196    
197 siliconforks 174 static void print_regex(jsval value, Stream * f) {
198 siliconforks 2 assert(JSVAL_IS_STRING(value));
199     JSString * s = JSVAL_TO_STRING(value);
200 siliconforks 174 size_t length = JSSTRING_LENGTH(s);
201     jschar * characters = JSSTRING_CHARS(s);
202     for (size_t i = 0; i < length; i++) {
203     jschar c = characters[i];
204     if (32 <= c && c <= 126) {
205     Stream_write_char(f, c);
206     }
207     else {
208     Stream_printf(f, "\\u%04x", c);
209     }
210     }
211 siliconforks 2 }
212    
213 siliconforks 92 static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
214 siliconforks 2 assert(ATOM_IS_STRING(atom));
215     JSString * s = ATOM_TO_STRING(atom);
216 siliconforks 174 Stream_write_char(f, '"');
217     print_string(s, f);
218     Stream_write_char(f, '"');
219 siliconforks 2 }
220    
221     static const char * get_op(uint8 op) {
222     switch(op) {
223 siliconforks 336 case JSOP_OR:
224     return "||";
225     case JSOP_AND:
226     return "&&";
227 siliconforks 2 case JSOP_BITOR:
228     return "|";
229     case JSOP_BITXOR:
230     return "^";
231     case JSOP_BITAND:
232     return "&";
233     case JSOP_EQ:
234     return "==";
235     case JSOP_NE:
236     return "!=";
237 siliconforks 336 case JSOP_STRICTEQ:
238 siliconforks 2 return "===";
239 siliconforks 336 case JSOP_STRICTNE:
240 siliconforks 2 return "!==";
241     case JSOP_LT:
242     return "<";
243     case JSOP_LE:
244     return "<=";
245     case JSOP_GT:
246     return ">";
247     case JSOP_GE:
248     return ">=";
249     case JSOP_LSH:
250     return "<<";
251     case JSOP_RSH:
252     return ">>";
253     case JSOP_URSH:
254     return ">>>";
255     case JSOP_ADD:
256     return "+";
257     case JSOP_SUB:
258     return "-";
259     case JSOP_MUL:
260     return "*";
261     case JSOP_DIV:
262     return "/";
263     case JSOP_MOD:
264     return "%";
265     default:
266     abort();
267     }
268     }
269    
270 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f);
271 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
272 siliconforks 345 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
273 siliconforks 2
274 siliconforks 155 enum FunctionType {
275     FUNCTION_NORMAL,
276     FUNCTION_GETTER_OR_SETTER
277     };
278    
279 siliconforks 346 static void output_for_in(JSParseNode * node, Stream * f) {
280     assert(node->pn_type == TOK_FOR);
281     assert(node->pn_arity == PN_BINARY);
282     Stream_write_string(f, "for ");
283     if (node->pn_iflags & JSITER_FOREACH) {
284     Stream_write_string(f, "each ");
285     }
286     Stream_write_char(f, '(');
287     instrument_expression(node->pn_left, f);
288     Stream_write_char(f, ')');
289     }
290    
291 siliconforks 357 static void output_array_comprehension_or_generator_expression(JSParseNode * node, Stream * f) {
292     assert(node->pn_type == TOK_LEXICALSCOPE);
293     assert(node->pn_arity == PN_NAME);
294     JSParseNode * for_node = node->pn_expr;
295     assert(for_node->pn_type == TOK_FOR);
296     assert(for_node->pn_arity == PN_BINARY);
297     JSParseNode * p = for_node;
298     while (p->pn_type == TOK_FOR) {
299     p = p->pn_right;
300     }
301     JSParseNode * if_node = NULL;
302     if (p->pn_type == TOK_IF) {
303     if_node = p;
304     assert(if_node->pn_arity == PN_TERNARY);
305     p = if_node->pn_kid2;
306     }
307     assert(p->pn_arity == PN_UNARY);
308     p = p->pn_kid;
309     if (p->pn_type == TOK_YIELD) {
310     /* for generator expressions */
311     p = p->pn_kid;
312     }
313    
314     instrument_expression(p, f);
315     p = for_node;
316     while (p->pn_type == TOK_FOR) {
317     Stream_write_char(f, ' ');
318     output_for_in(p, f);
319     p = p->pn_right;
320     }
321     if (if_node) {
322     Stream_write_string(f, " if (");
323     instrument_expression(if_node->pn_kid1, f);
324     Stream_write_char(f, ')');
325     }
326     }
327    
328 siliconforks 155 static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
329 siliconforks 336 assert(node->pn_type == TOK_FUNCTION);
330 siliconforks 156 assert(node->pn_arity == PN_FUNC);
331 siliconforks 336 JSObject * object = node->pn_funpob->object;
332 siliconforks 156 assert(JS_ObjectIsFunction(context, object));
333     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
334     assert(function);
335 siliconforks 336 assert(object == &function->object);
336 siliconforks 156 Stream_printf(f, "%*s", indent, "");
337     if (type == FUNCTION_NORMAL) {
338     Stream_write_string(f, "function");
339     }
340 siliconforks 2
341 siliconforks 156 /* function name */
342     if (function->atom) {
343     Stream_write_char(f, ' ');
344     print_string_atom(function->atom, f);
345     }
346 siliconforks 2
347 siliconforks 336 /*
348     function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
349     js_DecompileFunction in jsopcode.cpp
350     */
351 siliconforks 156 Stream_write_string(f, "(");
352 siliconforks 336 JSArenaPool pool;
353     JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
354     jsuword * local_names = NULL;
355     if (JS_GET_LOCAL_NAME_COUNT(function)) {
356     local_names = js_GetLocalNameArray(context, function, &pool);
357     if (local_names == NULL) {
358     fatal("out of memory");
359 siliconforks 2 }
360 siliconforks 156 }
361     for (int i = 0; i < function->nargs; i++) {
362     if (i > 0) {
363     Stream_write_string(f, ", ");
364 siliconforks 2 }
365 siliconforks 336 JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
366 siliconforks 352 if (param == NULL) {
367     fatal("unsupported parameter type for function: %s", file_id);
368     }
369 siliconforks 336 print_string_atom(param, f);
370 siliconforks 156 }
371 siliconforks 336 JS_FinishArenaPool(&pool);
372 siliconforks 156 Stream_write_string(f, ") {\n");
373 siliconforks 2
374 siliconforks 156 /* function body */
375 siliconforks 345 if (function->flags & JSFUN_EXPR_CLOSURE) {
376     /* expression closure */
377     output_statement(node->pn_body, f, indent + 2, false);
378     }
379     else {
380     instrument_statement(node->pn_body, f, indent + 2, false);
381     }
382 siliconforks 2
383 siliconforks 156 Stream_write_string(f, "}\n");
384 siliconforks 2 }
385    
386 siliconforks 92 static void instrument_function_call(JSParseNode * node, Stream * f) {
387 siliconforks 351 JSParseNode * function_node = node->pn_head;
388     if (function_node->pn_type == TOK_FUNCTION) {
389     JSObject * object = function_node->pn_funpob->object;
390     assert(JS_ObjectIsFunction(context, object));
391     JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
392     assert(function);
393     assert(object == &function->object);
394    
395     if (function_node->pn_flags & TCF_GENEXP_LAMBDA) {
396     /* it's a generator expression */
397     Stream_write_char(f, '(');
398 siliconforks 357 output_array_comprehension_or_generator_expression(function_node->pn_body, f);
399 siliconforks 351 Stream_write_char(f, ')');
400     return;
401 siliconforks 2 }
402 siliconforks 351 else {
403     Stream_write_char(f, '(');
404     instrument_expression(function_node, f);
405 siliconforks 346 Stream_write_char(f, ')');
406     }
407 siliconforks 2 }
408 siliconforks 346 else {
409 siliconforks 351 instrument_expression(function_node, f);
410     }
411     Stream_write_char(f, '(');
412     for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) {
413     if (p != node->pn_head->pn_next) {
414     Stream_write_string(f, ", ");
415 siliconforks 346 }
416 siliconforks 351 instrument_expression(p, f);
417 siliconforks 346 }
418 siliconforks 351 Stream_write_char(f, ')');
419 siliconforks 2 }
420    
421 siliconforks 340 static void instrument_declarations(JSParseNode * list, Stream * f) {
422     assert(list->pn_arity == PN_LIST);
423     for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
424 siliconforks 341 switch (p->pn_type) {
425     case TOK_NAME:
426     assert(p->pn_arity == PN_NAME);
427     if (p != list->pn_head) {
428     Stream_write_string(f, ", ");
429     }
430     print_string_atom(p->pn_atom, f);
431     if (p->pn_expr != NULL) {
432     Stream_write_string(f, " = ");
433     instrument_expression(p->pn_expr, f);
434     }
435     break;
436     case TOK_ASSIGN:
437     case TOK_RB:
438     case TOK_RC:
439     /* destructuring */
440     instrument_expression(p, f);
441     break;
442     default:
443     abort();
444     break;
445 siliconforks 340 }
446     }
447     }
448    
449 siliconforks 2 /*
450     See <Expressions> in jsparse.h.
451     TOK_FUNCTION is handled as a statement and as an expression.
452     TOK_DBLDOT is not handled (XML op).
453     TOK_DEFSHARP and TOK_USESHARP are not handled.
454     TOK_ANYNAME is not handled (XML op).
455     TOK_AT is not handled (XML op).
456     TOK_DBLCOLON is not handled.
457     TOK_XML* are not handled.
458     There seem to be some undocumented expressions:
459     TOK_INSTANCEOF binary
460     TOK_IN binary
461     */
462 siliconforks 92 static void instrument_expression(JSParseNode * node, Stream * f) {
463 siliconforks 2 switch (node->pn_type) {
464     case TOK_FUNCTION:
465 siliconforks 155 instrument_function(node, f, 0, FUNCTION_NORMAL);
466 siliconforks 2 break;
467     case TOK_COMMA:
468     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
469     if (p != node->pn_head) {
470 siliconforks 92 Stream_write_string(f, ", ");
471 siliconforks 2 }
472     instrument_expression(p, f);
473     }
474     break;
475     case TOK_ASSIGN:
476     instrument_expression(node->pn_left, f);
477 siliconforks 92 Stream_write_char(f, ' ');
478 siliconforks 2 switch (node->pn_op) {
479     case JSOP_ADD:
480     case JSOP_SUB:
481     case JSOP_MUL:
482     case JSOP_MOD:
483     case JSOP_LSH:
484     case JSOP_RSH:
485     case JSOP_URSH:
486     case JSOP_BITAND:
487     case JSOP_BITOR:
488     case JSOP_BITXOR:
489     case JSOP_DIV:
490 siliconforks 92 Stream_printf(f, "%s", get_op(node->pn_op));
491 siliconforks 2 break;
492     default:
493     /* do nothing - it must be a simple assignment */
494     break;
495     }
496 siliconforks 92 Stream_write_string(f, "= ");
497 siliconforks 2 instrument_expression(node->pn_right, f);
498     break;
499     case TOK_HOOK:
500     instrument_expression(node->pn_kid1, f);
501 siliconforks 92 Stream_write_string(f, "? ");
502 siliconforks 2 instrument_expression(node->pn_kid2, f);
503 siliconforks 92 Stream_write_string(f, ": ");
504 siliconforks 2 instrument_expression(node->pn_kid3, f);
505     break;
506     case TOK_OR:
507     case TOK_AND:
508     case TOK_BITOR:
509     case TOK_BITXOR:
510     case TOK_BITAND:
511     case TOK_EQOP:
512     case TOK_RELOP:
513     case TOK_SHOP:
514     case TOK_PLUS:
515     case TOK_MINUS:
516     case TOK_STAR:
517     case TOK_DIVOP:
518     switch (node->pn_arity) {
519     case PN_BINARY:
520     instrument_expression(node->pn_left, f);
521 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
522 siliconforks 2 instrument_expression(node->pn_right, f);
523     break;
524     case PN_LIST:
525     for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
526     if (p != node->pn_head) {
527 siliconforks 92 Stream_printf(f, " %s ", get_op(node->pn_op));
528 siliconforks 2 }
529     instrument_expression(p, f);
530     }
531     break;
532     default:
533     abort();
534     }
535     break;
536     case TOK_UNARYOP:
537     switch (node->pn_op) {
538     case JSOP_NEG:
539 siliconforks 92 Stream_write_char(f, '-');
540 siliconforks 2 instrument_expression(node->pn_kid, f);
541     break;
542     case JSOP_POS:
543 siliconforks 92 Stream_write_char(f, '+');
544 siliconforks 2 instrument_expression(node->pn_kid, f);
545     break;
546     case JSOP_NOT:
547 siliconforks 92 Stream_write_char(f, '!');
548 siliconforks 2 instrument_expression(node->pn_kid, f);
549     break;
550     case JSOP_BITNOT:
551 siliconforks 92 Stream_write_char(f, '~');
552 siliconforks 2 instrument_expression(node->pn_kid, f);
553     break;
554     case JSOP_TYPEOF:
555 siliconforks 92 Stream_write_string(f, "typeof ");
556 siliconforks 2 instrument_expression(node->pn_kid, f);
557     break;
558     case JSOP_VOID:
559 siliconforks 92 Stream_write_string(f, "void ");
560 siliconforks 2 instrument_expression(node->pn_kid, f);
561     break;
562     default:
563 siliconforks 354 fatal("%s: unknown operator (%d) in file", file_id, node->pn_op);
564 siliconforks 2 break;
565     }
566     break;
567     case TOK_INC:
568     case TOK_DEC:
569     /*
570     This is not documented, but node->pn_op tells whether it is pre- or post-increment.
571     */
572     switch (node->pn_op) {
573     case JSOP_INCNAME:
574     case JSOP_INCPROP:
575     case JSOP_INCELEM:
576 siliconforks 92 Stream_write_string(f, "++");
577 siliconforks 2 instrument_expression(node->pn_kid, f);
578     break;
579     case JSOP_DECNAME:
580     case JSOP_DECPROP:
581     case JSOP_DECELEM:
582 siliconforks 92 Stream_write_string(f, "--");
583 siliconforks 2 instrument_expression(node->pn_kid, f);
584     break;
585     case JSOP_NAMEINC:
586     case JSOP_PROPINC:
587     case JSOP_ELEMINC:
588     instrument_expression(node->pn_kid, f);
589 siliconforks 92 Stream_write_string(f, "++");
590 siliconforks 2 break;
591     case JSOP_NAMEDEC:
592     case JSOP_PROPDEC:
593     case JSOP_ELEMDEC:
594     instrument_expression(node->pn_kid, f);
595 siliconforks 92 Stream_write_string(f, "--");
596 siliconforks 2 break;
597     default:
598     abort();
599     break;
600     }
601     break;
602     case TOK_NEW:
603 siliconforks 92 Stream_write_string(f, "new ");
604 siliconforks 2 instrument_function_call(node, f);
605     break;
606     case TOK_DELETE:
607 siliconforks 92 Stream_write_string(f, "delete ");
608 siliconforks 2 instrument_expression(node->pn_kid, f);
609     break;
610     case TOK_DOT:
611     /*
612     This may have originally been x['foo-bar']. Because the string 'foo-bar'
613     contains illegal characters, we have to use the subscript syntax instead of
614     the dot syntax.
615     */
616     instrument_expression(node->pn_expr, f);
617 siliconforks 84 assert(ATOM_IS_STRING(node->pn_atom));
618     {
619     JSString * s = ATOM_TO_STRING(node->pn_atom);
620 siliconforks 349 bool must_quote;
621     if (JSSTRING_LENGTH(s) == 0) {
622     must_quote = true;
623 siliconforks 84 }
624 siliconforks 349 else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
625     must_quote = true;
626     }
627     else if (! js_IsIdentifier(s)) {
628     must_quote = true;
629     }
630 siliconforks 84 else {
631 siliconforks 349 must_quote = false;
632     }
633     if (must_quote) {
634 siliconforks 92 Stream_write_char(f, '[');
635 siliconforks 84 print_quoted_string_atom(node->pn_atom, f);
636 siliconforks 92 Stream_write_char(f, ']');
637 siliconforks 84 }
638 siliconforks 349 else {
639     Stream_write_char(f, '.');
640     print_string_atom(node->pn_atom, f);
641     }
642 siliconforks 84 }
643 siliconforks 2 break;
644     case TOK_LB:
645     instrument_expression(node->pn_left, f);
646 siliconforks 92 Stream_write_char(f, '[');
647 siliconforks 2 instrument_expression(node->pn_right, f);
648 siliconforks 92 Stream_write_char(f, ']');
649 siliconforks 2 break;
650     case TOK_LP:
651     instrument_function_call(node, f);
652     break;
653     case TOK_RB:
654 siliconforks 92 Stream_write_char(f, '[');
655 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
656     if (p != node->pn_head) {
657 siliconforks 92 Stream_write_string(f, ", ");
658 siliconforks 2 }
659     /* TOK_COMMA is a special case: a hole in the array */
660     if (p->pn_type != TOK_COMMA) {
661     instrument_expression(p, f);
662     }
663     }
664     if (node->pn_extra == PNX_ENDCOMMA) {
665 siliconforks 92 Stream_write_char(f, ',');
666 siliconforks 2 }
667 siliconforks 92 Stream_write_char(f, ']');
668 siliconforks 2 break;
669     case TOK_RC:
670 siliconforks 92 Stream_write_char(f, '{');
671 siliconforks 2 for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
672 siliconforks 353 if (p->pn_type != TOK_COLON) {
673     fatal("unsupported node type in file %s: %d", file_id, p->pn_type);
674     }
675 siliconforks 2 if (p != node->pn_head) {
676 siliconforks 92 Stream_write_string(f, ", ");
677 siliconforks 2 }
678 siliconforks 155
679     /* check whether this is a getter or setter */
680     switch (p->pn_op) {
681     case JSOP_GETTER:
682     case JSOP_SETTER:
683 siliconforks 293 if (p->pn_op == JSOP_GETTER) {
684     Stream_write_string(f, "get ");
685     }
686     else {
687     Stream_write_string(f, "set ");
688     }
689 siliconforks 155 instrument_expression(p->pn_left, f);
690 siliconforks 293 if (p->pn_right->pn_type != TOK_FUNCTION) {
691     fatal("parse error: expected function");
692     }
693 siliconforks 155 instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
694     break;
695     default:
696     instrument_expression(p->pn_left, f);
697     Stream_write_string(f, ": ");
698     instrument_expression(p->pn_right, f);
699     break;
700     }
701 siliconforks 2 }
702 siliconforks 92 Stream_write_char(f, '}');
703 siliconforks 2 break;
704     case TOK_RP:
705 siliconforks 92 Stream_write_char(f, '(');
706 siliconforks 2 instrument_expression(node->pn_kid, f);
707 siliconforks 92 Stream_write_char(f, ')');
708 siliconforks 2 break;
709     case TOK_NAME:
710     print_string_atom(node->pn_atom, f);
711     break;
712     case TOK_STRING:
713     print_quoted_string_atom(node->pn_atom, f);
714     break;
715 siliconforks 336 case TOK_REGEXP:
716     assert(node->pn_op == JSOP_REGEXP);
717     {
718     JSObject * object = node->pn_pob->object;
719     jsval result;
720     js_regexp_toString(context, object, &result);
721     print_regex(result, f);
722 siliconforks 2 }
723     break;
724     case TOK_NUMBER:
725     /*
726     A 64-bit IEEE 754 floating point number has a 52-bit fraction.
727     2^(-52) = 2.22 x 10^(-16)
728     Thus there are 16 significant digits.
729     To keep the output simple, special-case zero.
730     */
731     if (node->pn_dval == 0.0) {
732 siliconforks 92 Stream_write_string(f, "0");
733 siliconforks 2 }
734     else {
735 siliconforks 92 Stream_printf(f, "%.15g", node->pn_dval);
736 siliconforks 2 }
737     break;
738     case TOK_PRIMARY:
739     switch (node->pn_op) {
740     case JSOP_TRUE:
741 siliconforks 92 Stream_write_string(f, "true");
742 siliconforks 2 break;
743     case JSOP_FALSE:
744 siliconforks 92 Stream_write_string(f, "false");
745 siliconforks 2 break;
746     case JSOP_NULL:
747 siliconforks 92 Stream_write_string(f, "null");
748 siliconforks 2 break;
749     case JSOP_THIS:
750 siliconforks 92 Stream_write_string(f, "this");
751 siliconforks 2 break;
752     /* jsscan.h mentions `super' ??? */
753     default:
754     abort();
755     }
756     break;
757     case TOK_INSTANCEOF:
758     instrument_expression(node->pn_left, f);
759 siliconforks 92 Stream_write_string(f, " instanceof ");
760 siliconforks 2 instrument_expression(node->pn_right, f);
761     break;
762     case TOK_IN:
763     instrument_expression(node->pn_left, f);
764 siliconforks 92 Stream_write_string(f, " in ");
765 siliconforks 2 instrument_expression(node->pn_right, f);
766     break;
767 siliconforks 340 case TOK_LEXICALSCOPE:
768     assert(node->pn_arity == PN_NAME);
769     assert(node->pn_expr->pn_type == TOK_LET);
770     assert(node->pn_expr->pn_arity == PN_BINARY);
771     Stream_write_string(f, "let(");
772     assert(node->pn_expr->pn_left->pn_type == TOK_LP);
773     assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
774     instrument_declarations(node->pn_expr->pn_left, f);
775     Stream_write_string(f, ") ");
776     instrument_expression(node->pn_expr->pn_right, f);
777     break;
778 siliconforks 342 case TOK_YIELD:
779     assert(node->pn_arity == PN_UNARY);
780 siliconforks 355 Stream_write_string(f, "yield");
781     if (node->pn_kid != NULL) {
782     Stream_write_char(f, ' ');
783     instrument_expression(node->pn_kid, f);
784     }
785 siliconforks 342 break;
786 siliconforks 343 case TOK_ARRAYCOMP:
787     assert(node->pn_arity == PN_LIST);
788     {
789     JSParseNode * block_node;
790     switch (node->pn_count) {
791     case 1:
792     block_node = node->pn_head;
793     break;
794     case 2:
795     block_node = node->pn_head->pn_next;
796     break;
797     default:
798     abort();
799     break;
800     }
801     Stream_write_char(f, '[');
802 siliconforks 357 output_array_comprehension_or_generator_expression(block_node, f);
803 siliconforks 343 Stream_write_char(f, ']');
804     }
805     break;
806     case TOK_VAR:
807     assert(node->pn_arity == PN_LIST);
808     Stream_write_string(f, "var ");
809     instrument_declarations(node, f);
810     break;
811     case TOK_LET:
812     assert(node->pn_arity == PN_LIST);
813     Stream_write_string(f, "let ");
814     instrument_declarations(node, f);
815     break;
816 siliconforks 2 default:
817     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
818     }
819     }
820    
821 siliconforks 240 static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
822 siliconforks 2 switch (node->pn_type) {
823     case TOK_FUNCTION:
824 siliconforks 155 instrument_function(node, f, indent, FUNCTION_NORMAL);
825 siliconforks 2 break;
826     case TOK_LC:
827     assert(node->pn_arity == PN_LIST);
828     /*
829 siliconforks 92 Stream_write_string(f, "{\n");
830 siliconforks 2 */
831     for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
832 siliconforks 240 instrument_statement(p, f, indent, false);
833 siliconforks 2 }
834     /*
835 siliconforks 92 Stream_printf(f, "%*s", indent, "");
836     Stream_write_string(f, "}\n");
837 siliconforks 2 */
838     break;
839     case TOK_IF:
840 siliconforks 240 {
841 siliconforks 2 assert(node->pn_arity == PN_TERNARY);
842 siliconforks 240
843     uint16_t line = node->pn_pos.begin.lineno;
844     if (! is_jscoverage_if) {
845     if (line > num_lines) {
846     fatal("%s: script contains more than 65,535 lines", file_id);
847     }
848     if (line >= 2 && exclusive_directives[line - 2]) {
849     is_jscoverage_if = true;
850     }
851     }
852    
853 siliconforks 92 Stream_printf(f, "%*s", indent, "");
854     Stream_write_string(f, "if (");
855 siliconforks 2 instrument_expression(node->pn_kid1, f);
856 siliconforks 92 Stream_write_string(f, ") {\n");
857 siliconforks 240 if (is_jscoverage_if && node->pn_kid3) {
858     uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
859     uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
860     Stream_printf(f, "%*s", indent + 2, "");
861     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
862     }
863     instrument_statement(node->pn_kid2, f, indent + 2, false);
864 siliconforks 92 Stream_printf(f, "%*s", indent, "");
865     Stream_write_string(f, "}\n");
866 siliconforks 240
867     if (node->pn_kid3 || is_jscoverage_if) {
868 siliconforks 92 Stream_printf(f, "%*s", indent, "");
869     Stream_write_string(f, "else {\n");
870 siliconforks 240
871     if (is_jscoverage_if) {
872     uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
873     uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
874     Stream_printf(f, "%*s", indent + 2, "");
875     Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
876     }
877    
878     if (node->pn_kid3) {
879     instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
880     }
881    
882 siliconforks 92 Stream_printf(f, "%*s", indent, "");
883     Stream_write_string(f, "}\n");
884 siliconforks 2 }
885 siliconforks 240
886 siliconforks 2 break;
887 siliconforks 240 }
888 siliconforks 2 case TOK_SWITCH:
889     assert(node->pn_arity == PN_BINARY);
890 siliconforks 92 Stream_printf(f, "%*s", indent, "");
891     Stream_write_string(f, "switch (");
892 siliconforks 2 instrument_expression(node->pn_left, f);
893 siliconforks 92 Stream_write_string(f, ") {\n");
894 siliconforks 350 {
895     JSParseNode * list = node->pn_right;
896     if (list->pn_type == TOK_LEXICALSCOPE) {
897     list = list->pn_expr;
898 siliconforks 2 }
899 siliconforks 350 for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
900     Stream_printf(f, "%*s", indent, "");
901     switch (p->pn_type) {
902     case TOK_CASE:
903     Stream_write_string(f, "case ");
904     instrument_expression(p->pn_left, f);
905     Stream_write_string(f, ":\n");
906     break;
907     case TOK_DEFAULT:
908     Stream_write_string(f, "default:\n");
909     break;
910     default:
911     abort();
912     break;
913     }
914     instrument_statement(p->pn_right, f, indent + 2, false);
915     }
916 siliconforks 2 }
917 siliconforks 92 Stream_printf(f, "%*s", indent, "");
918     Stream_write_string(f, "}\n");
919 siliconforks 2 break;
920     case TOK_CASE:
921     case TOK_DEFAULT:
922     abort();
923     break;
924     case TOK_WHILE:
925     assert(node->pn_arity == PN_BINARY);
926 siliconforks 92 Stream_printf(f, "%*s", indent, "");
927     Stream_write_string(f, "while (");
928 siliconforks 2 instrument_expression(node->pn_left, f);
929 siliconforks 92 Stream_write_string(f, ") {\n");
930 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
931 siliconforks 92 Stream_write_string(f, "}\n");
932 siliconforks 2 break;
933     case TOK_DO:
934     assert(node->pn_arity == PN_BINARY);
935 siliconforks 92 Stream_printf(f, "%*s", indent, "");
936     Stream_write_string(f, "do {\n");
937 siliconforks 240 instrument_statement(node->pn_left, f, indent + 2, false);
938 siliconforks 92 Stream_write_string(f, "}\n");
939     Stream_printf(f, "%*s", indent, "");
940     Stream_write_string(f, "while (");
941 siliconforks 2 instrument_expression(node->pn_right, f);
942 siliconforks 92 Stream_write_string(f, ");\n");
943 siliconforks 2 break;
944     case TOK_FOR:
945     assert(node->pn_arity == PN_BINARY);
946 siliconforks 92 Stream_printf(f, "%*s", indent, "");
947 siliconforks 2 switch (node->pn_left->pn_type) {
948     case TOK_IN:
949     /* for/in */
950     assert(node->pn_left->pn_arity == PN_BINARY);
951 siliconforks 343 output_for_in(node, f);
952 siliconforks 2 break;
953     case TOK_RESERVED:
954     /* for (;;) */
955     assert(node->pn_left->pn_arity == PN_TERNARY);
956 siliconforks 343 Stream_write_string(f, "for (");
957 siliconforks 2 if (node->pn_left->pn_kid1) {
958 siliconforks 343 instrument_expression(node->pn_left->pn_kid1, f);
959 siliconforks 2 }
960 siliconforks 92 Stream_write_string(f, ";");
961 siliconforks 2 if (node->pn_left->pn_kid2) {
962 siliconforks 92 Stream_write_char(f, ' ');
963 siliconforks 2 instrument_expression(node->pn_left->pn_kid2, f);
964     }
965 siliconforks 92 Stream_write_string(f, ";");
966 siliconforks 2 if (node->pn_left->pn_kid3) {
967 siliconforks 92 Stream_write_char(f, ' ');
968 siliconforks 2 instrument_expression(node->pn_left->pn_kid3, f);
969     }
970 siliconforks 343 Stream_write_char(f, ')');
971 siliconforks 2 break;
972     default:
973     abort();
974     break;
975     }
976 siliconforks 343 Stream_write_string(f, " {\n");
977 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
978 siliconforks 92 Stream_write_string(f, "}\n");
979 siliconforks 2 break;
980     case TOK_THROW:
981     assert(node->pn_arity == PN_UNARY);
982 siliconforks 92 Stream_printf(f, "%*s", indent, "");
983     Stream_write_string(f, "throw ");
984 siliconforks 2 instrument_expression(node->pn_u.unary.kid, f);
985 siliconforks 92 Stream_write_string(f, ";\n");
986 siliconforks 2 break;
987     case TOK_TRY:
988 siliconforks 92 Stream_printf(f, "%*s", indent, "");
989     Stream_write_string(f, "try {\n");
990 siliconforks 240 instrument_statement(node->pn_kid1, f, indent + 2, false);
991 siliconforks 92 Stream_printf(f, "%*s", indent, "");
992     Stream_write_string(f, "}\n");
993 siliconforks 336 if (node->pn_kid2) {
994     assert(node->pn_kid2->pn_type == TOK_RESERVED);
995     for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
996     assert(scope->pn_type == TOK_LEXICALSCOPE);
997     JSParseNode * catch = scope->pn_expr;
998 siliconforks 2 assert(catch->pn_type == TOK_CATCH);
999 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1000     Stream_write_string(f, "catch (");
1001 siliconforks 341 /* this may not be a name - destructuring assignment */
1002     /*
1003 siliconforks 2 assert(catch->pn_kid1->pn_arity == PN_NAME);
1004     print_string_atom(catch->pn_kid1->pn_atom, f);
1005 siliconforks 341 */
1006     instrument_expression(catch->pn_kid1, f);
1007 siliconforks 336 if (catch->pn_kid2) {
1008 siliconforks 92 Stream_write_string(f, " if ");
1009 siliconforks 336 instrument_expression(catch->pn_kid2, f);
1010 siliconforks 2 }
1011 siliconforks 92 Stream_write_string(f, ") {\n");
1012 siliconforks 240 instrument_statement(catch->pn_kid3, f, indent + 2, false);
1013 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1014     Stream_write_string(f, "}\n");
1015 siliconforks 2 }
1016     }
1017     if (node->pn_kid3) {
1018 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1019     Stream_write_string(f, "finally {\n");
1020 siliconforks 240 instrument_statement(node->pn_kid3, f, indent + 2, false);
1021 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1022     Stream_write_string(f, "}\n");
1023 siliconforks 2 }
1024     break;
1025     case TOK_CATCH:
1026     abort();
1027     break;
1028     case TOK_BREAK:
1029     case TOK_CONTINUE:
1030     assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1031 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1032     Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1033 siliconforks 2 JSAtom * atom = node->pn_u.name.atom;
1034     if (atom != NULL) {
1035 siliconforks 92 Stream_write_char(f, ' ');
1036 siliconforks 2 print_string_atom(node->pn_atom, f);
1037     }
1038 siliconforks 92 Stream_write_string(f, ";\n");
1039 siliconforks 2 break;
1040     case TOK_WITH:
1041     assert(node->pn_arity == PN_BINARY);
1042 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1043     Stream_write_string(f, "with (");
1044 siliconforks 2 instrument_expression(node->pn_left, f);
1045 siliconforks 92 Stream_write_string(f, ") {\n");
1046 siliconforks 240 instrument_statement(node->pn_right, f, indent + 2, false);
1047 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1048     Stream_write_string(f, "}\n");
1049 siliconforks 2 break;
1050     case TOK_VAR:
1051 siliconforks 343 Stream_printf(f, "%*s", indent, "");
1052     instrument_expression(node, f);
1053 siliconforks 92 Stream_write_string(f, ";\n");
1054 siliconforks 2 break;
1055     case TOK_RETURN:
1056     assert(node->pn_arity == PN_UNARY);
1057 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1058     Stream_write_string(f, "return");
1059 siliconforks 2 if (node->pn_kid != NULL) {
1060 siliconforks 92 Stream_write_char(f, ' ');
1061 siliconforks 2 instrument_expression(node->pn_kid, f);
1062     }
1063 siliconforks 92 Stream_write_string(f, ";\n");
1064 siliconforks 2 break;
1065     case TOK_SEMI:
1066     assert(node->pn_arity == PN_UNARY);
1067 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1068 siliconforks 2 if (node->pn_kid != NULL) {
1069     instrument_expression(node->pn_kid, f);
1070     }
1071 siliconforks 92 Stream_write_string(f, ";\n");
1072 siliconforks 2 break;
1073     case TOK_COLON:
1074     assert(node->pn_arity == PN_NAME);
1075     /*
1076     This one is tricky: can't output instrumentation between the label and the
1077     statement it's supposed to label ...
1078     */
1079 siliconforks 92 Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1080 siliconforks 2 print_string_atom(node->pn_atom, f);
1081 siliconforks 92 Stream_write_string(f, ":\n");
1082 siliconforks 2 /*
1083     ... use output_statement instead of instrument_statement.
1084     */
1085 siliconforks 240 output_statement(node->pn_expr, f, indent, false);
1086 siliconforks 2 break;
1087 siliconforks 340 case TOK_LEXICALSCOPE:
1088     /* let statement */
1089     assert(node->pn_arity == PN_NAME);
1090     switch (node->pn_expr->pn_type) {
1091     case TOK_LET:
1092     /* let statement */
1093     assert(node->pn_expr->pn_arity == PN_BINARY);
1094     instrument_statement(node->pn_expr, f, indent, false);
1095     break;
1096     case TOK_LC:
1097     /* block */
1098     Stream_printf(f, "%*s", indent, "");
1099     Stream_write_string(f, "{\n");
1100     instrument_statement(node->pn_expr, f, indent + 2, false);
1101     Stream_printf(f, "%*s", indent, "");
1102     Stream_write_string(f, "}\n");
1103     break;
1104     case TOK_FOR:
1105     instrument_statement(node->pn_expr, f, indent, false);
1106     break;
1107     default:
1108     abort();
1109     break;
1110     }
1111     break;
1112     case TOK_LET:
1113     switch (node->pn_arity) {
1114     case PN_BINARY:
1115     /* let statement */
1116     Stream_printf(f, "%*s", indent, "");
1117     Stream_write_string(f, "let (");
1118     assert(node->pn_left->pn_type == TOK_LP);
1119     assert(node->pn_left->pn_arity == PN_LIST);
1120     instrument_declarations(node->pn_left, f);
1121     Stream_write_string(f, ") {\n");
1122     instrument_statement(node->pn_right, f, indent + 2, false);
1123     Stream_printf(f, "%*s", indent, "");
1124     Stream_write_string(f, "}\n");
1125     break;
1126     case PN_LIST:
1127     /* let definition */
1128 siliconforks 343 Stream_printf(f, "%*s", indent, "");
1129     instrument_expression(node, f);
1130 siliconforks 340 Stream_write_string(f, ";\n");
1131     break;
1132     default:
1133     abort();
1134     break;
1135     }
1136     break;
1137 siliconforks 348 case TOK_DEBUGGER:
1138     Stream_printf(f, "%*s", indent, "");
1139     Stream_write_string(f, "debugger;\n");
1140     break;
1141 siliconforks 2 default:
1142     fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
1143     }
1144     }
1145    
1146     /*
1147     See <Statements> in jsparse.h.
1148     TOK_FUNCTION is handled as a statement and as an expression.
1149     TOK_EXPORT, TOK_IMPORT are not handled.
1150     */
1151 siliconforks 240 static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1152 siliconforks 340 if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1153 siliconforks 214 uint16_t line = node->pn_pos.begin.lineno;
1154     if (line > num_lines) {
1155     fatal("%s: script contains more than 65,535 lines", file_id);
1156     }
1157    
1158 siliconforks 2 /* the root node has line number 0 */
1159     if (line != 0) {
1160 siliconforks 92 Stream_printf(f, "%*s", indent, "");
1161     Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1162 siliconforks 2 lines[line - 1] = 1;
1163     }
1164     }
1165 siliconforks 240 output_statement(node, f, indent, is_jscoverage_if);
1166 siliconforks 2 }
1167    
1168 siliconforks 190 static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1169     const jschar * characters_end = characters + line_end;
1170     const jschar * cp = characters + line_start;
1171     const char * bp = prefix;
1172     for (;;) {
1173     if (*bp == '\0') {
1174     return true;
1175     }
1176     else if (cp == characters_end) {
1177     return false;
1178     }
1179     else if (*cp != *bp) {
1180     return false;
1181     }
1182     bp++;
1183     cp++;
1184     }
1185     }
1186    
1187 siliconforks 240 static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1188     /* XXX - other Unicode space */
1189     const jschar * end = characters + line_end;
1190     for (const jschar * p = characters + line_start; p < end; p++) {
1191     jschar c = *p;
1192     if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1193     continue;
1194     }
1195     else {
1196     return false;
1197     }
1198     }
1199     return true;
1200     }
1201    
1202 siliconforks 284 static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1203     fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1204     }
1205    
1206 siliconforks 179 void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1207 siliconforks 2 file_id = id;
1208    
1209 siliconforks 336 /* parse the javascript */
1210     JSParseContext parse_context;
1211     if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1212 siliconforks 2 fatal("cannot create token stream from file: %s", file_id);
1213     }
1214 siliconforks 284 JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1215 siliconforks 336 JSParseNode * node = js_ParseScript(context, global, &parse_context);
1216 siliconforks 2 if (node == NULL) {
1217 siliconforks 284 js_ReportUncaughtException(context);
1218 siliconforks 2 fatal("parse error in file: %s", file_id);
1219     }
1220 siliconforks 284 JS_SetErrorReporter(context, old_error_reporter);
1221 siliconforks 214 num_lines = node->pn_pos.end.lineno;
1222 siliconforks 2 lines = xmalloc(num_lines);
1223 siliconforks 240 for (unsigned int i = 0; i < num_lines; i++) {
1224 siliconforks 2 lines[i] = 0;
1225     }
1226    
1227 siliconforks 240 /* search code for conditionals */
1228     exclusive_directives = xnew(bool, num_lines);
1229     for (unsigned int i = 0; i < num_lines; i++) {
1230     exclusive_directives[i] = false;
1231 siliconforks 2 }
1232    
1233 siliconforks 157 bool has_conditionals = false;
1234 siliconforks 240 struct IfDirective * if_directives = NULL;
1235 siliconforks 157 size_t line_number = 0;
1236     size_t i = 0;
1237 siliconforks 176 while (i < num_characters) {
1238 siliconforks 240 if (line_number == UINT16_MAX) {
1239     fatal("%s: script has more than 65,535 lines", file_id);
1240     }
1241 siliconforks 157 line_number++;
1242     size_t line_start = i;
1243 siliconforks 190 jschar c;
1244     bool done = false;
1245     while (! done && i < num_characters) {
1246     c = characters[i];
1247     switch (c) {
1248     case '\r':
1249     case '\n':
1250     case 0x2028:
1251     case 0x2029:
1252     done = true;
1253     break;
1254     default:
1255     i++;
1256     }
1257 siliconforks 157 }
1258     size_t line_end = i;
1259 siliconforks 176 if (i < num_characters) {
1260 siliconforks 190 i++;
1261     if (c == '\r' && i < num_characters && characters[i] == '\n') {
1262 siliconforks 157 i++;
1263     }
1264     }
1265 siliconforks 240
1266 siliconforks 190 if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1267 siliconforks 240 has_conditionals = true;
1268    
1269     if (characters_are_white_space(characters, line_start + 16, line_end)) {
1270     exclusive_directives[line_number - 1] = true;
1271 siliconforks 157 }
1272 siliconforks 240 else {
1273     struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1274     if_directive->condition_start = characters + line_start + 16;
1275     if_directive->condition_end = characters + line_end;
1276     if_directive->start_line = line_number;
1277     if_directive->end_line = 0;
1278     if_directive->next = if_directives;
1279     if_directives = if_directive;
1280 siliconforks 190 }
1281 siliconforks 157 }
1282 siliconforks 190 else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1283 siliconforks 240 for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1284     if (p->end_line == 0) {
1285     p->end_line = line_number;
1286     break;
1287     }
1288     }
1289 siliconforks 157 }
1290     }
1291    
1292 siliconforks 240 /*
1293     An instrumented JavaScript file has 4 sections:
1294     1. initialization
1295     2. instrumented source code
1296     3. conditionals
1297     4. original source code
1298     */
1299    
1300     Stream * instrumented = Stream_new(0);
1301     instrument_statement(node, instrumented, 0, false);
1302 siliconforks 336 js_FinishParseContext(context, &parse_context);
1303 siliconforks 240
1304     /* write line number info to the output */
1305     Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1306 siliconforks 361 if (jscoverage_mozilla) {
1307     Stream_write_string(output, "try {\n");
1308     Stream_write_string(output, " Components.utils.import('resource://gre/modules/jscoverage.jsm');\n");
1309     Stream_printf(output, " dump('%s: successfully imported jscoverage module\\n');\n", id);
1310     Stream_write_string(output, "}\n");
1311     Stream_write_string(output, "catch (e) {\n");
1312     Stream_write_string(output, " _$jscoverage = {};\n");
1313     Stream_printf(output, " dump('%s: failed to import jscoverage module - coverage not available for this file\\n');\n", id);
1314     Stream_write_string(output, "}\n");
1315     }
1316     else {
1317     Stream_write_string(output, "if (! top._$jscoverage) {\n top._$jscoverage = {};\n}\n");
1318     Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1319     }
1320 siliconforks 240 Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1321     Stream_printf(output, " _$jscoverage['%s'] = [];\n", file_id);
1322     for (int i = 0; i < num_lines; i++) {
1323     if (lines[i]) {
1324     Stream_printf(output, " _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1325     }
1326     }
1327     Stream_write_string(output, "}\n");
1328     free(lines);
1329     lines = NULL;
1330     free(exclusive_directives);
1331     exclusive_directives = NULL;
1332    
1333     /* conditionals */
1334     if (has_conditionals) {
1335     Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1336     }
1337    
1338     /* copy the instrumented source code to the output */
1339     Stream_write(output, instrumented->data, instrumented->length);
1340    
1341     /* conditionals */
1342     for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1343     Stream_write_string(output, "if (!(");
1344 siliconforks 246 print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1345 siliconforks 240 Stream_write_string(output, ")) {\n");
1346     Stream_printf(output, " _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1347     Stream_write_string(output, "}\n");
1348     }
1349    
1350     /* free */
1351     while (if_directives != NULL) {
1352     struct IfDirective * if_directive = if_directives;
1353     if_directives = if_directives->next;
1354     free(if_directive);
1355     }
1356    
1357 siliconforks 95 /* copy the original source to the output */
1358 siliconforks 179 Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1359     jscoverage_write_source(id, characters, num_characters, output);
1360     Stream_printf(output, ";\n");
1361 siliconforks 95
1362 siliconforks 179 Stream_delete(instrumented);
1363    
1364     file_id = NULL;
1365     }
1366    
1367     void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1368     Stream_write_string(output, "[");
1369     if (jscoverage_highlight) {
1370     Stream * highlighted_stream = Stream_new(num_characters);
1371     jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1372     size_t i = 0;
1373     while (i < highlighted_stream->length) {
1374     if (i > 0) {
1375     Stream_write_char(output, ',');
1376     }
1377    
1378     Stream_write_char(output, '"');
1379     bool done = false;
1380     while (! done) {
1381     char c = highlighted_stream->data[i];
1382     switch (c) {
1383     case 0x8:
1384     /* backspace */
1385     Stream_write_string(output, "\\b");
1386     break;
1387     case 0x9:
1388     /* horizontal tab */
1389     Stream_write_string(output, "\\t");
1390     break;
1391     case 0xa:
1392     /* line feed (new line) */
1393     done = true;
1394     break;
1395 siliconforks 317 /* IE doesn't support this */
1396     /*
1397 siliconforks 179 case 0xb:
1398     Stream_write_string(output, "\\v");
1399     break;
1400 siliconforks 317 */
1401 siliconforks 179 case 0xc:
1402     /* form feed */
1403     Stream_write_string(output, "\\f");
1404     break;
1405     case 0xd:
1406     /* carriage return */
1407     done = true;
1408     if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1409     i++;
1410     }
1411     break;
1412     case '"':
1413     Stream_write_string(output, "\\\"");
1414     break;
1415     case '\\':
1416     Stream_write_string(output, "\\\\");
1417     break;
1418     default:
1419     Stream_write_char(output, c);
1420     break;
1421     }
1422 siliconforks 95 i++;
1423 siliconforks 179 if (i >= highlighted_stream->length) {
1424     done = true;
1425 siliconforks 95 }
1426     }
1427 siliconforks 179 Stream_write_char(output, '"');
1428     }
1429     Stream_delete(highlighted_stream);
1430     }
1431     else {
1432     size_t i = 0;
1433     while (i < num_characters) {
1434     if (i > 0) {
1435     Stream_write_char(output, ',');
1436     }
1437    
1438     Stream_write_char(output, '"');
1439     bool done = false;
1440     while (! done) {
1441     jschar c = characters[i];
1442     switch (c) {
1443     case 0x8:
1444     /* backspace */
1445     Stream_write_string(output, "\\b");
1446     break;
1447     case 0x9:
1448     /* horizontal tab */
1449     Stream_write_string(output, "\\t");
1450     break;
1451     case 0xa:
1452     /* line feed (new line) */
1453     done = true;
1454     break;
1455 siliconforks 317 /* IE doesn't support this */
1456     /*
1457 siliconforks 179 case 0xb:
1458     Stream_write_string(output, "\\v");
1459     break;
1460 siliconforks 317 */
1461 siliconforks 179 case 0xc:
1462     /* form feed */
1463     Stream_write_string(output, "\\f");
1464     break;
1465     case 0xd:
1466     /* carriage return */
1467     done = true;
1468     if (i + 1 < num_characters && characters[i + 1] == '\n') {
1469     i++;
1470     }
1471     break;
1472     case '"':
1473     Stream_write_string(output, "\\\"");
1474     break;
1475     case '\\':
1476     Stream_write_string(output, "\\\\");
1477     break;
1478     case '&':
1479     Stream_write_string(output, "&amp;");
1480     break;
1481     case '<':
1482     Stream_write_string(output, "&lt;");
1483     break;
1484     case '>':
1485     Stream_write_string(output, "&gt;");
1486     break;
1487     case 0x2028:
1488     case 0x2029:
1489     done = true;
1490     break;
1491     default:
1492     if (32 <= c && c <= 126) {
1493     Stream_write_char(output, c);
1494     }
1495     else {
1496     Stream_printf(output, "&#%d;", c);
1497     }
1498     break;
1499     }
1500 siliconforks 95 i++;
1501 siliconforks 179 if (i >= num_characters) {
1502     done = true;
1503     }
1504 siliconforks 95 }
1505 siliconforks 179 Stream_write_char(output, '"');
1506 siliconforks 95 }
1507     }
1508 siliconforks 179 Stream_write_string(output, "]");
1509 siliconforks 2 }
1510 siliconforks 116
1511     void jscoverage_copy_resources(const char * destination_directory) {
1512     copy_resource("jscoverage.html", destination_directory);
1513     copy_resource("jscoverage.css", destination_directory);
1514     copy_resource("jscoverage.js", destination_directory);
1515 siliconforks 169 copy_resource("jscoverage-ie.css", destination_directory);
1516 siliconforks 116 copy_resource("jscoverage-throbber.gif", destination_directory);
1517 siliconforks 179 copy_resource("jscoverage-highlight.css", destination_directory);
1518 siliconforks 116 }
1519    
1520     /*
1521     coverage reports
1522     */
1523    
1524     struct FileCoverageList {
1525     FileCoverage * file_coverage;
1526     struct FileCoverageList * next;
1527     };
1528    
1529     struct Coverage {
1530     JSHashTable * coverage_table;
1531     struct FileCoverageList * coverage_list;
1532     };
1533    
1534     static int compare_strings(const void * p1, const void * p2) {
1535     return strcmp(p1, p2) == 0;
1536     }
1537    
1538     Coverage * Coverage_new(void) {
1539     Coverage * result = xmalloc(sizeof(Coverage));
1540     result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1541     if (result->coverage_table == NULL) {
1542     fatal("cannot create hash table");
1543     }
1544     result->coverage_list = NULL;
1545     return result;
1546     }
1547    
1548     void Coverage_delete(Coverage * coverage) {
1549     JS_HashTableDestroy(coverage->coverage_table);
1550     struct FileCoverageList * p = coverage->coverage_list;
1551     while (p != NULL) {
1552 siliconforks 179 free(p->file_coverage->coverage_lines);
1553     if (p->file_coverage->source_lines != NULL) {
1554     for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1555     free(p->file_coverage->source_lines[i]);
1556     }
1557     free(p->file_coverage->source_lines);
1558     }
1559 siliconforks 116 free(p->file_coverage->id);
1560     free(p->file_coverage);
1561     struct FileCoverageList * q = p;
1562     p = p->next;
1563     free(q);
1564     }
1565     free(coverage);
1566     }
1567    
1568     struct EnumeratorArg {
1569     CoverageForeachFunction f;
1570     void * p;
1571     };
1572    
1573     static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1574     struct EnumeratorArg * enumerator_arg = arg;
1575     enumerator_arg->f(entry->value, i, enumerator_arg->p);
1576     return 0;
1577     }
1578    
1579     void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1580     struct EnumeratorArg enumerator_arg;
1581     enumerator_arg.f = f;
1582     enumerator_arg.p = p;
1583     JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1584     }
1585    
1586     int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1587 siliconforks 336 int result = 0;
1588    
1589 siliconforks 116 jschar * base = js_InflateString(context, (char *) json, &length);
1590     if (base == NULL) {
1591     fatal("out of memory");
1592     }
1593    
1594     jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1595     parenthesized_json[0] = '(';
1596     memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1597     parenthesized_json[length + 1] = ')';
1598    
1599     JS_free(context, base);
1600    
1601 siliconforks 336 JSParseContext parse_context;
1602     if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1603     free(parenthesized_json);
1604     return -1;
1605 siliconforks 116 }
1606 siliconforks 336 JSParseNode * root = js_ParseScript(context, global, &parse_context);
1607 siliconforks 116 free(parenthesized_json);
1608     if (root == NULL) {
1609 siliconforks 336 result = -1;
1610     goto done;
1611 siliconforks 116 }
1612    
1613     /* root node must be TOK_LC */
1614     if (root->pn_type != TOK_LC) {
1615 siliconforks 336 result = -1;
1616     goto done;
1617 siliconforks 116 }
1618     JSParseNode * semi = root->pn_u.list.head;
1619    
1620     /* the list must be TOK_SEMI and it must contain only one element */
1621     if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1622 siliconforks 336 result = -1;
1623     goto done;
1624 siliconforks 116 }
1625     JSParseNode * parenthesized = semi->pn_kid;
1626    
1627     /* this must be a parenthesized expression */
1628     if (parenthesized->pn_type != TOK_RP) {
1629 siliconforks 336 result = -1;
1630     goto done;
1631 siliconforks 116 }
1632     JSParseNode * object = parenthesized->pn_kid;
1633    
1634     /* this must be an object literal */
1635     if (object->pn_type != TOK_RC) {
1636 siliconforks 336 result = -1;
1637     goto done;
1638 siliconforks 116 }
1639    
1640     for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1641     /* every element of this list must be TOK_COLON */
1642     if (p->pn_type != TOK_COLON) {
1643 siliconforks 336 result = -1;
1644     goto done;
1645 siliconforks 116 }
1646    
1647     /* the key must be a string representing the file */
1648     JSParseNode * key = p->pn_left;
1649     if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1650 siliconforks 336 result = -1;
1651     goto done;
1652 siliconforks 116 }
1653     char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1654    
1655     /* the value must be an object literal OR an array */
1656     JSParseNode * value = p->pn_right;
1657     if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1658 siliconforks 336 result = -1;
1659     goto done;
1660 siliconforks 116 }
1661    
1662     JSParseNode * array = NULL;
1663     JSParseNode * source = NULL;
1664     if (value->pn_type == TOK_RB) {
1665     /* an array */
1666     array = value;
1667     }
1668     else if (value->pn_type == TOK_RC) {
1669     /* an object literal */
1670     if (value->pn_count != 2) {
1671 siliconforks 336 result = -1;
1672     goto done;
1673 siliconforks 116 }
1674     for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1675     if (element->pn_type != TOK_COLON) {
1676 siliconforks 336 result = -1;
1677     goto done;
1678 siliconforks 116 }
1679     JSParseNode * left = element->pn_left;
1680     if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1681 siliconforks 336 result = -1;
1682     goto done;
1683 siliconforks 116 }
1684     const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1685     if (strcmp(s, "coverage") == 0) {
1686     array = element->pn_right;
1687     if (array->pn_type != TOK_RB) {
1688 siliconforks 336 result = -1;
1689     goto done;
1690 siliconforks 116 }
1691     }
1692     else if (strcmp(s, "source") == 0) {
1693     source = element->pn_right;
1694 siliconforks 179 if (source->pn_type != TOK_RB) {
1695 siliconforks 336 result = -1;
1696     goto done;
1697 siliconforks 116 }
1698     }
1699     else {
1700 siliconforks 336 result = -1;
1701     goto done;
1702 siliconforks 116 }
1703     }
1704     }
1705     else {
1706 siliconforks 336 result = -1;
1707     goto done;
1708 siliconforks 116 }
1709    
1710     if (array == NULL) {
1711 siliconforks 336 result = -1;
1712     goto done;
1713 siliconforks 116 }
1714    
1715     /* look up the file in the coverage table */
1716     FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1717     if (file_coverage == NULL) {
1718     /* not there: create a new one */
1719     char * id = xstrdup(id_bytes);
1720     file_coverage = xmalloc(sizeof(FileCoverage));
1721     file_coverage->id = id;
1722 siliconforks 179 file_coverage->num_coverage_lines = array->pn_count;
1723     file_coverage->coverage_lines = xnew(int, array->pn_count);
1724 siliconforks 245 file_coverage->source_lines = NULL;
1725 siliconforks 116
1726     /* set coverage for all lines */
1727     uint32 i = 0;
1728     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1729     if (element->pn_type == TOK_NUMBER) {
1730 siliconforks 179 file_coverage->coverage_lines[i] = (int) element->pn_dval;
1731 siliconforks 116 }
1732     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1733 siliconforks 179 file_coverage->coverage_lines[i] = -1;
1734 siliconforks 116 }
1735     else {
1736 siliconforks 336 result = -1;
1737     goto done;
1738 siliconforks 116 }
1739     }
1740     assert(i == array->pn_count);
1741    
1742     /* add to the hash table */
1743     JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1744     struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1745     coverage_list->file_coverage = file_coverage;
1746     coverage_list->next = coverage->coverage_list;
1747     coverage->coverage_list = coverage_list;
1748     }
1749     else {
1750     /* sanity check */
1751     assert(strcmp(file_coverage->id, id_bytes) == 0);
1752 siliconforks 179 if (file_coverage->num_coverage_lines != array->pn_count) {
1753 siliconforks 336 result = -2;
1754     goto done;
1755 siliconforks 116 }
1756    
1757     /* merge the coverage */
1758     uint32 i = 0;
1759     for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1760     if (element->pn_type == TOK_NUMBER) {
1761 siliconforks 179 if (file_coverage->coverage_lines[i] == -1) {
1762 siliconforks 336 result = -2;
1763     goto done;
1764 siliconforks 116 }
1765 siliconforks 179 file_coverage->coverage_lines[i] += (int) element->pn_dval;
1766 siliconforks 116 }
1767     else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1768 siliconforks 179 if (file_coverage->coverage_lines[i] != -1) {
1769 siliconforks 336 result = -2;
1770     goto done;
1771 siliconforks 116 }
1772     }
1773     else {
1774 siliconforks 336 result = -1;
1775     goto done;
1776 siliconforks 116 }
1777     }
1778     assert(i == array->pn_count);
1779 siliconforks 245 }
1780 siliconforks 116
1781 siliconforks 245 /* if this JSON file has source, use it */
1782     if (file_coverage->source_lines == NULL && source != NULL) {
1783     file_coverage->num_source_lines = source->pn_count;
1784     file_coverage->source_lines = xnew(char *, source->pn_count);
1785     uint32 i = 0;
1786     for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1787     if (element->pn_type != TOK_STRING) {
1788 siliconforks 336 result = -1;
1789     goto done;
1790 siliconforks 179 }
1791 siliconforks 245 file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1792 siliconforks 116 }
1793 siliconforks 245 assert(i == source->pn_count);
1794 siliconforks 116 }
1795     }
1796    
1797 siliconforks 336 done:
1798     js_FinishParseContext(context, &parse_context);
1799     return result;
1800 siliconforks 116 }

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