/[jscoverage]/trunk/instrument-js.cpp
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revision 70 by siliconforks, Thu Nov 22 02:52:38 2007 UTC revision 374 by siliconforks, Mon Oct 27 21:42:58 2008 UTC
# Line 1  Line 1 
1  /*  /*
2      instrument-js.c - JavaScript instrumentation routines      instrument-js.c - JavaScript instrumentation routines
3      Copyright (C) 2007 siliconforks.com      Copyright (C) 2007, 2008 siliconforks.com
4    
5      This program is free software; you can redistribute it and/or modify      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      it under the terms of the GNU General Public License as published by
# Line 17  Line 17 
17      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */  */
19    
20    #include <config.h>
21    
22  #include "instrument-js.h"  #include "instrument-js.h"
23    
24  #include <assert.h>  #include <assert.h>
# Line 24  Line 26 
26  #include <string.h>  #include <string.h>
27    
28  #include <jsapi.h>  #include <jsapi.h>
29    #include <jsarena.h>
30  #include <jsatom.h>  #include <jsatom.h>
31    #include <jsemit.h>
32    #include <jsexn.h>
33  #include <jsfun.h>  #include <jsfun.h>
34  #include <jsinterp.h>  #include <jsinterp.h>
35    #include <jsiter.h>
36  #include <jsparse.h>  #include <jsparse.h>
37  #include <jsregexp.h>  #include <jsregexp.h>
38  #include <jsscope.h>  #include <jsscope.h>
39  #include <jsstr.h>  #include <jsstr.h>
40    
41    #include "encoding.h"
42    #include "global.h"
43    #include "highlight.h"
44    #include "resource-manager.h"
45  #include "util.h"  #include "util.h"
46    
47    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    bool jscoverage_mozilla = false;
56    
57    static bool * exclusive_directives = NULL;
58    
59  static JSRuntime * runtime = NULL;  static JSRuntime * runtime = NULL;
60  static JSContext * context = NULL;  static JSContext * context = NULL;
61  static JSObject * global = NULL;  static JSObject * global = NULL;
62    static JSVersion js_version = JSVERSION_ECMA_3;
63    
64  /*  /*
65  JSParseNode objects store line numbers starting from 1.  JSParseNode objects store line numbers starting from 1.
# Line 44  Line 67 
67  */  */
68  static const char * file_id = NULL;  static const char * file_id = NULL;
69  static char * lines = NULL;  static char * lines = NULL;
70    static uint16_t num_lines = 0;
71    
72    void jscoverage_set_js_version(const char * version) {
73      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 ((size_t) (end - version) != strlen(version)) {
81        fatal("invalid version: %s", version);
82      }
83    }
84    
85  void jscoverage_init(void) {  void jscoverage_init(void) {
86    runtime = JS_NewRuntime(8L * 1024L * 1024L);    runtime = JS_NewRuntime(8L * 1024L * 1024L);
# Line 56  Line 93 
93      fatal("cannot create context");      fatal("cannot create context");
94    }    }
95    
96      JS_SetVersion(context, js_version);
97    
98    global = JS_NewObject(context, NULL, NULL, NULL);    global = JS_NewObject(context, NULL, NULL, NULL);
99    if (global == NULL) {    if (global == NULL) {
100      fatal("cannot create global object");      fatal("cannot create global object");
# Line 71  Line 110 
110    JS_DestroyRuntime(runtime);    JS_DestroyRuntime(runtime);
111  }  }
112    
113  static void print_string(JSString * s, FILE * f) {  static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
114    for (int i = 0; i < s->length; i++) {    for (size_t i = 0; i < num_characters; i++) {
115      char c = s->chars[i];      jschar c = characters[i];
116      fputc(c, f);      /*
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    static void print_string(JSString * s, Stream * f) {
138      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          /* IE doesn't support this */
172          /*
173          case 0xb:
174            Stream_write_string(f, "\\v");
175            break;
176          */
177          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    }    }
189  }  }
190    
191  static void print_string_atom(JSAtom * atom, FILE * f) {  static void print_string_atom(JSAtom * atom, Stream * f) {
192    assert(ATOM_IS_STRING(atom));    assert(ATOM_IS_STRING(atom));
193    JSString * s = ATOM_TO_STRING(atom);    JSString * s = ATOM_TO_STRING(atom);
194    print_string(s, f);    print_string(s, f);
195  }  }
196    
197  static void print_string_jsval(jsval value, FILE * f) {  static void print_regex(jsval value, Stream * f) {
198    assert(JSVAL_IS_STRING(value));    assert(JSVAL_IS_STRING(value));
199    JSString * s = JSVAL_TO_STRING(value);    JSString * s = JSVAL_TO_STRING(value);
200    print_string(s, f);    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  }  }
212    
213  static void print_quoted_string_atom(JSAtom * atom, FILE * f) {  static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
214    assert(ATOM_IS_STRING(atom));    assert(ATOM_IS_STRING(atom));
215    JSString * s = ATOM_TO_STRING(atom);    JSString * s = ATOM_TO_STRING(atom);
216    JSString * quoted = js_QuoteString(context, s, '"');    Stream_write_char(f, '"');
217    print_string(quoted, f);    print_string(s, f);
218      Stream_write_char(f, '"');
219  }  }
220    
221  static const char * get_op(uint8 op) {  static const char * get_op(uint8 op) {
222    switch(op) {    switch(op) {
223      case JSOP_OR:
224        return "||";
225      case JSOP_AND:
226        return "&&";
227    case JSOP_BITOR:    case JSOP_BITOR:
228      return "|";      return "|";
229    case JSOP_BITXOR:    case JSOP_BITXOR:
# Line 109  Line 234 
234      return "==";      return "==";
235    case JSOP_NE:    case JSOP_NE:
236      return "!=";      return "!=";
237    case JSOP_NEW_EQ:    case JSOP_STRICTEQ:
238      return "===";      return "===";
239    case JSOP_NEW_NE:    case JSOP_STRICTNE:
240      return "!==";      return "!==";
241    case JSOP_LT:    case JSOP_LT:
242      return "<";      return "<";
# Line 142  Line 267 
267    }    }
268  }  }
269    
270  static void instrument_expression(JSParseNode * node, FILE * f);  static void instrument_expression(JSParseNode * node, Stream * f);
271  static void instrument_statement(JSParseNode * node, FILE * f, int indent);  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
272    static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
273    
274    enum FunctionType {
275      FUNCTION_NORMAL,
276      FUNCTION_GETTER_OR_SETTER
277    };
278    
279    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  static void instrument_function(JSParseNode * node, FILE * f, int indent) {  static void output_array_comprehension_or_generator_expression(JSParseNode * node, Stream * f) {
292      assert(node->pn_arity == PN_FUNC);    assert(node->pn_type == TOK_LEXICALSCOPE);
293      assert(ATOM_IS_OBJECT(node->pn_funAtom));    assert(node->pn_arity == PN_NAME);
294      JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);    JSParseNode * for_node = node->pn_expr;
295      assert(JS_ObjectIsFunction(context, object));    assert(for_node->pn_type == TOK_FOR);
296      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);    assert(for_node->pn_arity == PN_BINARY);
297      assert(function);    JSParseNode * p = for_node;
298      assert(object == function->object);    while (p->pn_type == TOK_FOR) {
299      fprintf(f, "%*s", indent, "");      p = p->pn_right;
300      fprintf(f, "function");    }
301      JSParseNode * if_node = NULL;
302      /* function name */    if (p->pn_type == TOK_IF) {
303      if (function->atom) {      if_node = p;
304        fputc(' ', f);      assert(if_node->pn_arity == PN_TERNARY);
305        print_string_atom(function->atom, f);      p = if_node->pn_kid2;
306      }    }
307      assert(p->pn_arity == PN_UNARY);
308      /* function parameters */    p = p->pn_kid;
309      fprintf(f, "(");    if (p->pn_type == TOK_YIELD) {
310      JSAtom ** params = xmalloc(function->nargs * sizeof(JSAtom *));      /* for generator expressions */
311      for (int i = 0; i < function->nargs; i++) {      p = p->pn_kid;
312        /* initialize to NULL for sanity check */    }
313        params[i] = NULL;  
314      }    instrument_expression(p, f);
315      JSScope * scope = OBJ_SCOPE(object);    p = for_node;
316      for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {    while (p->pn_type == TOK_FOR) {
317        if (scope_property->getter != js_GetArgument) {      Stream_write_char(f, ' ');
318          continue;      output_for_in(p, f);
319        }      p = p->pn_right;
320        assert(scope_property->flags & SPROP_HAS_SHORTID);    }
321        assert((uint16) scope_property->shortid < function->nargs);    if (if_node) {
322        assert(JSID_IS_ATOM(scope_property->id));      Stream_write_string(f, " if (");
323        params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);      instrument_expression(if_node->pn_kid1, f);
324        Stream_write_char(f, ')');
325      }
326    }
327    
328    static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
329      assert(node->pn_type == TOK_FUNCTION);
330      assert(node->pn_arity == PN_FUNC);
331      JSObject * object = node->pn_funpob->object;
332      assert(JS_ObjectIsFunction(context, object));
333      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
334      assert(function);
335      assert(object == &function->object);
336      Stream_printf(f, "%*s", indent, "");
337      if (type == FUNCTION_NORMAL) {
338        Stream_write_string(f, "function ");
339      }
340    
341      /* function name */
342      if (function->atom) {
343        print_string_atom(function->atom, f);
344      }
345    
346      /*
347      function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
348      js_DecompileFunction in jsopcode.cpp
349      */
350      Stream_write_char(f, '(');
351      JSArenaPool pool;
352      JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
353      jsuword * local_names = NULL;
354      if (JS_GET_LOCAL_NAME_COUNT(function)) {
355        local_names = js_GetLocalNameArray(context, function, &pool);
356        if (local_names == NULL) {
357          fatal("out of memory");
358      }      }
359      for (int i = 0; i < function->nargs; i++) {    }
360        assert(params[i] != NULL);    bool destructuring = false;
361        if (i > 0) {    for (int i = 0; i < function->nargs; i++) {
362          fprintf(f, ", ");      if (i > 0) {
363        }        Stream_write_string(f, ", ");
364        if (ATOM_IS_STRING(params[i])) {      }
365          print_string_atom(params[i], f);      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
366        if (param == NULL) {
367          destructuring = true;
368          JSParseNode * expression = NULL;
369          assert(node->pn_body->pn_type == TOK_LC || node->pn_body->pn_type == TOK_BODY);
370          JSParseNode * semi = node->pn_body->pn_head;
371          assert(semi->pn_type == TOK_SEMI);
372          JSParseNode * comma = semi->pn_kid;
373          assert(comma->pn_type == TOK_COMMA);
374          for (JSParseNode * p = comma->pn_head; p != NULL; p = p->pn_next) {
375            assert(p->pn_type == TOK_ASSIGN);
376            JSParseNode * rhs = p->pn_right;
377            assert(JSSTRING_LENGTH(ATOM_TO_STRING(rhs->pn_atom)) == 0);
378            if (rhs->pn_slot == i) {
379              expression = p->pn_left;
380              break;
381            }
382        }        }
383          assert(expression != NULL);
384          instrument_expression(expression, f);
385        }
386        else {
387          print_string_atom(param, f);
388      }      }
389      fprintf(f, ") {\n");    }
390      free(params);    JS_FinishArenaPool(&pool);
391      Stream_write_string(f, ") {\n");
392    
393      /* function body */    /* function body */
394      instrument_statement(node->pn_body, f, indent + 2);    if (function->flags & JSFUN_EXPR_CLOSURE) {
395        /* expression closure - use output_statement instead of instrument_statement */
396        if (node->pn_body->pn_type == TOK_BODY) {
397          assert(node->pn_body->pn_arity == PN_LIST);
398          assert(node->pn_body->pn_count == 2);
399          output_statement(node->pn_body->pn_head->pn_next, f, indent + 2, false);
400        }
401        else {
402          output_statement(node->pn_body, f, indent + 2, false);
403        }
404      }
405      else {
406        assert(node->pn_body->pn_type == TOK_LC);
407        assert(node->pn_body->pn_arity == PN_LIST);
408        JSParseNode * p = node->pn_body->pn_head;
409        if (destructuring) {
410          p = p->pn_next;
411        }
412        for (; p != NULL; p = p->pn_next) {
413          instrument_statement(p, f, indent + 2, false);
414        }
415      }
416    
417      fprintf(f, "}\n");    Stream_write_string(f, "}\n");
418  }  }
419    
420  static void instrument_function_call(JSParseNode * node, FILE * f) {  static void instrument_function_call(JSParseNode * node, Stream * f) {
421    instrument_expression(node->pn_head, f);    JSParseNode * function_node = node->pn_head;
422    fputc('(', f);    if (function_node->pn_type == TOK_FUNCTION) {
423    for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {      JSObject * object = function_node->pn_funpob->object;
424        assert(JS_ObjectIsFunction(context, object));
425        JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
426        assert(function);
427        assert(object == &function->object);
428    
429        if (function_node->pn_flags & TCF_GENEXP_LAMBDA) {
430          /* it's a generator expression */
431          Stream_write_char(f, '(');
432          output_array_comprehension_or_generator_expression(function_node->pn_body, f);
433          Stream_write_char(f, ')');
434          return;
435        }
436        else {
437          Stream_write_char(f, '(');
438          instrument_expression(function_node, f);
439          Stream_write_char(f, ')');
440        }
441      }
442      else {
443        instrument_expression(function_node, f);
444      }
445      Stream_write_char(f, '(');
446      for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) {
447      if (p != node->pn_head->pn_next) {      if (p != node->pn_head->pn_next) {
448        fprintf(f, ", ");        Stream_write_string(f, ", ");
449      }      }
450      instrument_expression(p, f);      instrument_expression(p, f);
451    }    }
452    fputc(')', f);    Stream_write_char(f, ')');
453    }
454    
455    static void instrument_declarations(JSParseNode * list, Stream * f) {
456      assert(list->pn_arity == PN_LIST);
457      for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
458        switch (p->pn_type) {
459        case TOK_NAME:
460          assert(p->pn_arity == PN_NAME);
461          if (p != list->pn_head) {
462            Stream_write_string(f, ", ");
463          }
464          print_string_atom(p->pn_atom, f);
465          if (p->pn_expr != NULL) {
466            Stream_write_string(f, " = ");
467            instrument_expression(p->pn_expr, f);
468          }
469          break;
470        case TOK_ASSIGN:
471          /* destructuring */
472          instrument_expression(p->pn_left, f);
473          Stream_write_string(f, " = ");
474          instrument_expression(p->pn_right, f);
475          break;
476        case TOK_RB:
477        case TOK_RC:
478          /* destructuring */
479          instrument_expression(p, f);
480          break;
481        default:
482          abort();
483          break;
484        }
485      }
486  }  }
487    
488  /*  /*
# Line 222  Line 498 
498  TOK_INSTANCEOF  binary  TOK_INSTANCEOF  binary
499  TOK_IN          binary  TOK_IN          binary
500  */  */
501  static void instrument_expression(JSParseNode * node, FILE * f) {  static void instrument_expression(JSParseNode * node, Stream * f) {
502    switch (node->pn_type) {    switch (node->pn_type) {
503    case TOK_FUNCTION:    case TOK_FUNCTION:
504      instrument_function(node, f, 0);      instrument_function(node, f, 0, FUNCTION_NORMAL);
505      break;      break;
506    case TOK_COMMA:    case TOK_COMMA:
507      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
508        if (p != node->pn_head) {        if (p != node->pn_head) {
509          fprintf(f, ", ");          Stream_write_string(f, ", ");
510        }        }
511        instrument_expression(p, f);        instrument_expression(p, f);
512      }      }
513      break;      break;
514    case TOK_ASSIGN:    case TOK_ASSIGN:
515      instrument_expression(node->pn_left, f);      if (node->pn_left->pn_type == TOK_RC) {
516      fputc(' ', f);        /* destructuring assignment with object literal must be in parentheses */
517          Stream_write_char(f, '(');
518          instrument_expression(node->pn_left, f);
519          Stream_write_char(f, ')');
520        }
521        else {
522          instrument_expression(node->pn_left, f);
523        }
524        Stream_write_char(f, ' ');
525      switch (node->pn_op) {      switch (node->pn_op) {
526      case JSOP_ADD:      case JSOP_ADD:
527      case JSOP_SUB:      case JSOP_SUB:
# Line 250  Line 534 
534      case JSOP_BITOR:      case JSOP_BITOR:
535      case JSOP_BITXOR:      case JSOP_BITXOR:
536      case JSOP_DIV:      case JSOP_DIV:
537        fprintf(f, "%s", get_op(node->pn_op));        Stream_printf(f, "%s", get_op(node->pn_op));
538        break;        break;
539      default:      default:
540        /* do nothing - it must be a simple assignment */        /* do nothing - it must be a simple assignment */
541        break;        break;
542      }      }
543      fprintf(f, "= ");      Stream_write_string(f, "= ");
544      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
545      break;      break;
546    case TOK_HOOK:    case TOK_HOOK:
547      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
548      fprintf(f, "? ");      Stream_write_string(f, "? ");
549      instrument_expression(node->pn_kid2, f);      instrument_expression(node->pn_kid2, f);
550      fprintf(f, ": ");      Stream_write_string(f, ": ");
551      instrument_expression(node->pn_kid3, f);      instrument_expression(node->pn_kid3, f);
552      break;      break;
553    case TOK_OR:    case TOK_OR:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " || ");  
     instrument_expression(node->pn_right, f);  
     break;  
554    case TOK_AND:    case TOK_AND:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " && ");  
     instrument_expression(node->pn_right, f);  
     break;  
555    case TOK_BITOR:    case TOK_BITOR:
556    case TOK_BITXOR:    case TOK_BITXOR:
557    case TOK_BITAND:    case TOK_BITAND:
# Line 289  Line 565 
565      switch (node->pn_arity) {      switch (node->pn_arity) {
566      case PN_BINARY:      case PN_BINARY:
567        instrument_expression(node->pn_left, f);        instrument_expression(node->pn_left, f);
568        fprintf(f, " %s ", get_op(node->pn_op));        Stream_printf(f, " %s ", get_op(node->pn_op));
569        instrument_expression(node->pn_right, f);        instrument_expression(node->pn_right, f);
570        break;        break;
571      case PN_LIST:      case PN_LIST:
572        for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {        for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
573          if (p != node->pn_head) {          if (p != node->pn_head) {
574            fprintf(f, " %s ", get_op(node->pn_op));            Stream_printf(f, " %s ", get_op(node->pn_op));
575          }          }
576          instrument_expression(p, f);          instrument_expression(p, f);
577        }        }
# Line 307  Line 583 
583    case TOK_UNARYOP:    case TOK_UNARYOP:
584      switch (node->pn_op) {      switch (node->pn_op) {
585      case JSOP_NEG:      case JSOP_NEG:
586        fputc('-', f);        Stream_write_char(f, '-');
587        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
588        break;        break;
589      case JSOP_POS:      case JSOP_POS:
590        fputc('+', f);        Stream_write_char(f, '+');
591        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
592        break;        break;
593      case JSOP_NOT:      case JSOP_NOT:
594        fputc('!', f);        Stream_write_char(f, '!');
595        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
596        break;        break;
597      case JSOP_BITNOT:      case JSOP_BITNOT:
598        fputc('~', f);        Stream_write_char(f, '~');
599        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
600        break;        break;
601      case JSOP_TYPEOF:      case JSOP_TYPEOF:
602        fprintf(f, "typeof ");        Stream_write_string(f, "typeof ");
603        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
604        break;        break;
605      case JSOP_VOID:      case JSOP_VOID:
606        fprintf(f, "void ");        Stream_write_string(f, "void ");
607        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
608        break;        break;
609      default:      default:
610        abort();        fatal_source(file_id, node->pn_pos.begin.lineno, "unknown operator (%d)", node->pn_op);
611        break;        break;
612      }      }
613      break;      break;
# Line 344  Line 620 
620      case JSOP_INCNAME:      case JSOP_INCNAME:
621      case JSOP_INCPROP:      case JSOP_INCPROP:
622      case JSOP_INCELEM:      case JSOP_INCELEM:
623        fprintf(f, "++");        Stream_write_string(f, "++");
624        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
625        break;        break;
626      case JSOP_DECNAME:      case JSOP_DECNAME:
627      case JSOP_DECPROP:      case JSOP_DECPROP:
628      case JSOP_DECELEM:      case JSOP_DECELEM:
629        fprintf(f, "--");        Stream_write_string(f, "--");
630        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
631        break;        break;
632      case JSOP_NAMEINC:      case JSOP_NAMEINC:
633      case JSOP_PROPINC:      case JSOP_PROPINC:
634      case JSOP_ELEMINC:      case JSOP_ELEMINC:
635        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
636        fprintf(f, "++");        Stream_write_string(f, "++");
637        break;        break;
638      case JSOP_NAMEDEC:      case JSOP_NAMEDEC:
639      case JSOP_PROPDEC:      case JSOP_PROPDEC:
640      case JSOP_ELEMDEC:      case JSOP_ELEMDEC:
641        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
642        fprintf(f, "--");        Stream_write_string(f, "--");
643        break;        break;
644      default:      default:
645        abort();        abort();
# Line 371  Line 647 
647      }      }
648      break;      break;
649    case TOK_NEW:    case TOK_NEW:
650      fprintf(f, "new ");      Stream_write_string(f, "new ");
651      instrument_function_call(node, f);      instrument_function_call(node, f);
652      break;      break;
653    case TOK_DELETE:    case TOK_DELETE:
654      fprintf(f, "delete ");      Stream_write_string(f, "delete ");
655      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
656      break;      break;
657    case TOK_DOT:    case TOK_DOT:
# Line 385  Line 661 
661      the dot syntax.      the dot syntax.
662      */      */
663      instrument_expression(node->pn_expr, f);      instrument_expression(node->pn_expr, f);
664      /*      assert(ATOM_IS_STRING(node->pn_atom));
665      fputc('.', f);      {
666      print_string_atom(node->pn_atom, f);        JSString * s = ATOM_TO_STRING(node->pn_atom);
667      */        bool must_quote;
668      fputc('[', f);        if (JSSTRING_LENGTH(s) == 0) {
669      print_quoted_string_atom(node->pn_atom, f);          must_quote = true;
670      fputc(']', f);        }
671          else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
672            must_quote = true;
673          }
674          else if (! js_IsIdentifier(s)) {
675            must_quote = true;
676          }
677          else {
678            must_quote = false;
679          }
680          if (must_quote) {
681            Stream_write_char(f, '[');
682            print_quoted_string_atom(node->pn_atom, f);
683            Stream_write_char(f, ']');
684          }
685          else {
686            Stream_write_char(f, '.');
687            print_string_atom(node->pn_atom, f);
688          }
689        }
690      break;      break;
691    case TOK_LB:    case TOK_LB:
692      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
693      fputc('[', f);      Stream_write_char(f, '[');
694      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
695      fputc(']', f);      Stream_write_char(f, ']');
696      break;      break;
697    case TOK_LP:    case TOK_LP:
698      instrument_function_call(node, f);      instrument_function_call(node, f);
699      break;      break;
700    case TOK_RB:    case TOK_RB:
701      fputc('[', f);      Stream_write_char(f, '[');
702      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
703        if (p != node->pn_head) {        if (p != node->pn_head) {
704          fprintf(f, ", ");          Stream_write_string(f, ", ");
705        }        }
706        /* TOK_COMMA is a special case: a hole in the array */        /* TOK_COMMA is a special case: a hole in the array */
707        if (p->pn_type != TOK_COMMA) {        if (p->pn_type != TOK_COMMA) {
# Line 414  Line 709 
709        }        }
710      }      }
711      if (node->pn_extra == PNX_ENDCOMMA) {      if (node->pn_extra == PNX_ENDCOMMA) {
712        fputc(',', f);        Stream_write_char(f, ',');
713      }      }
714      fputc(']', f);      Stream_write_char(f, ']');
715      break;      break;
716    case TOK_RC:    case TOK_RC:
717      fputc('{', f);      Stream_write_char(f, '{');
718      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_head; p != NULL; p = p->pn_next) {
719        assert(p->pn_type == TOK_COLON);        if (p->pn_type != TOK_COLON) {
720            fatal_source(file_id, p->pn_pos.begin.lineno, "unsupported node type (%d)", p->pn_type);
721          }
722        if (p != node->pn_head) {        if (p != node->pn_head) {
723          fprintf(f, ", ");          Stream_write_string(f, ", ");
724          }
725    
726          /* check whether this is a getter or setter */
727          switch (p->pn_op) {
728          case JSOP_GETTER:
729          case JSOP_SETTER:
730            if (p->pn_op == JSOP_GETTER) {
731              Stream_write_string(f, "get ");
732            }
733            else {
734              Stream_write_string(f, "set ");
735            }
736            instrument_expression(p->pn_left, f);
737            if (p->pn_right->pn_type != TOK_FUNCTION) {
738              fatal_source(file_id, p->pn_pos.begin.lineno, "expected function");
739            }
740            instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
741            break;
742          default:
743            instrument_expression(p->pn_left, f);
744            Stream_write_string(f, ": ");
745            instrument_expression(p->pn_right, f);
746            break;
747        }        }
       instrument_expression(p->pn_left, f);  
       fprintf(f, ": ");  
       instrument_expression(p->pn_right, f);  
748      }      }
749      fputc('}', f);      Stream_write_char(f, '}');
750      break;      break;
751    case TOK_RP:    case TOK_RP:
752      fputc('(', f);      Stream_write_char(f, '(');
753      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
754      fputc(')', f);      Stream_write_char(f, ')');
755      break;      break;
756    case TOK_NAME:    case TOK_NAME:
757      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
# Line 442  Line 759 
759    case TOK_STRING:    case TOK_STRING:
760      print_quoted_string_atom(node->pn_atom, f);      print_quoted_string_atom(node->pn_atom, f);
761      break;      break;
762    case TOK_OBJECT:    case TOK_REGEXP:
763      switch (node->pn_op) {      assert(node->pn_op == JSOP_REGEXP);
764      case JSOP_OBJECT:      {
765        /* I assume this is JSOP_REGEXP */        JSObject * object = node->pn_pob->object;
766        abort();        jsval result;
767        break;        js_regexp_toString(context, object, &result);
768      case JSOP_REGEXP:        print_regex(result, f);
       assert(ATOM_IS_OBJECT(node->pn_atom));  
       {  
         JSObject * object = ATOM_TO_OBJECT(node->pn_atom);  
         jsval result;  
         js_regexp_toString(context, object, 0, NULL, &result);  
         print_string_jsval(result, f);  
       }  
       break;  
     default:  
       abort();  
       break;  
769      }      }
770      break;      break;
771    case TOK_NUMBER:    case TOK_NUMBER:
# Line 470  Line 776 
776      To keep the output simple, special-case zero.      To keep the output simple, special-case zero.
777      */      */
778      if (node->pn_dval == 0.0) {      if (node->pn_dval == 0.0) {
779        fprintf(f, "0");        Stream_write_string(f, "0");
780      }      }
781      else {      else {
782        fprintf(f, "%.15g", node->pn_dval);        Stream_printf(f, "%.15g", node->pn_dval);
783      }      }
784      break;      break;
785    case TOK_PRIMARY:    case TOK_PRIMARY:
786      switch (node->pn_op) {      switch (node->pn_op) {
787      case JSOP_TRUE:      case JSOP_TRUE:
788        fprintf(f, "true");        Stream_write_string(f, "true");
789        break;        break;
790      case JSOP_FALSE:      case JSOP_FALSE:
791        fprintf(f, "false");        Stream_write_string(f, "false");
792        break;        break;
793      case JSOP_NULL:      case JSOP_NULL:
794        fprintf(f, "null");        Stream_write_string(f, "null");
795        break;        break;
796      case JSOP_THIS:      case JSOP_THIS:
797        fprintf(f, "this");        Stream_write_string(f, "this");
798        break;        break;
799      /* jsscan.h mentions `super' ??? */      /* jsscan.h mentions `super' ??? */
800      default:      default:
# Line 497  Line 803 
803      break;      break;
804    case TOK_INSTANCEOF:    case TOK_INSTANCEOF:
805      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
806      fprintf(f, " instanceof ");      Stream_write_string(f, " instanceof ");
807      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
808      break;      break;
809    case TOK_IN:    case TOK_IN:
810      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
811      fprintf(f, " in ");      Stream_write_string(f, " in ");
812      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
813      break;      break;
814    default:    case TOK_LEXICALSCOPE:
815      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      assert(node->pn_arity == PN_NAME);
816    }      assert(node->pn_expr->pn_type == TOK_LET);
817  }      assert(node->pn_expr->pn_arity == PN_BINARY);
818        Stream_write_string(f, "let(");
819  static void instrument_var_statement(JSParseNode * node, FILE * f, int indent) {      assert(node->pn_expr->pn_left->pn_type == TOK_LP);
820    assert(node->pn_arity == PN_LIST);      assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
821    fprintf(f, "%*s", indent, "");      instrument_declarations(node->pn_expr->pn_left, f);
822    fprintf(f, "var ");      Stream_write_string(f, ") ");
823    for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {      instrument_expression(node->pn_expr->pn_right, f);
824      assert(p->pn_type == TOK_NAME);      break;
825      assert(p->pn_arity == PN_NAME);    case TOK_YIELD:
826      if (p != node->pn_head) {      assert(node->pn_arity == PN_UNARY);
827        fprintf(f, ", ");      Stream_write_string(f, "yield");
828        if (node->pn_kid != NULL) {
829          Stream_write_char(f, ' ');
830          instrument_expression(node->pn_kid, f);
831      }      }
832      print_string_atom(p->pn_atom, f);      break;
833      if (p->pn_expr != NULL) {    case TOK_ARRAYCOMP:
834        fprintf(f, " = ");      assert(node->pn_arity == PN_LIST);
835        instrument_expression(p->pn_expr, f);      {
836          JSParseNode * block_node;
837          switch (node->pn_count) {
838          case 1:
839            block_node = node->pn_head;
840            break;
841          case 2:
842            block_node = node->pn_head->pn_next;
843            break;
844          default:
845            abort();
846            break;
847          }
848          Stream_write_char(f, '[');
849          output_array_comprehension_or_generator_expression(block_node, f);
850          Stream_write_char(f, ']');
851      }      }
852        break;
853      case TOK_VAR:
854        assert(node->pn_arity == PN_LIST);
855        Stream_write_string(f, "var ");
856        instrument_declarations(node, f);
857        break;
858      case TOK_LET:
859        assert(node->pn_arity == PN_LIST);
860        Stream_write_string(f, "let ");
861        instrument_declarations(node, f);
862        break;
863      default:
864        fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
865    }    }
866  }  }
867    
868  static void output_statement(JSParseNode * node, FILE * f, int indent) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
869    switch (node->pn_type) {    switch (node->pn_type) {
870    case TOK_FUNCTION:    case TOK_FUNCTION:
871      instrument_function(node, f, indent);      instrument_function(node, f, indent, FUNCTION_NORMAL);
872      break;      break;
873    case TOK_LC:    case TOK_LC:
874      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
875  /*  /*
876      fprintf(f, "{\n");      Stream_write_string(f, "{\n");
877  */  */
878      for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {      for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {
879        instrument_statement(p, f, indent);        instrument_statement(p, f, indent, false);
880      }      }
881  /*  /*
882      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
883      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
884  */  */
885      break;      break;
886    case TOK_IF:    case TOK_IF:
887      {
888      assert(node->pn_arity == PN_TERNARY);      assert(node->pn_arity == PN_TERNARY);
889      fprintf(f, "%*s", indent, "");  
890      fprintf(f, "if (");      uint16_t line = node->pn_pos.begin.lineno;
891        if (! is_jscoverage_if) {
892          if (line > num_lines) {
893            fatal("file %s contains more than 65,535 lines", file_id);
894          }
895          if (line >= 2 && exclusive_directives[line - 2]) {
896            is_jscoverage_if = true;
897          }
898        }
899    
900        Stream_printf(f, "%*s", indent, "");
901        Stream_write_string(f, "if (");
902      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
903      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
904      instrument_statement(node->pn_kid2, f, indent + 2);      if (is_jscoverage_if && node->pn_kid3) {
905      fprintf(f, "%*s", indent, "");        uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
906      fprintf(f, "}\n");        uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
907      if (node->pn_kid3) {        Stream_printf(f, "%*s", indent + 2, "");
908        fprintf(f, "%*s", indent, "");        Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
909        fprintf(f, "else {\n");      }
910        instrument_statement(node->pn_kid3, f, indent + 2);      instrument_statement(node->pn_kid2, f, indent + 2, false);
911        fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
912        fprintf(f, "}\n");      Stream_write_string(f, "}\n");
913    
914        if (node->pn_kid3 || is_jscoverage_if) {
915          Stream_printf(f, "%*s", indent, "");
916          Stream_write_string(f, "else {\n");
917    
918          if (is_jscoverage_if) {
919            uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
920            uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
921            Stream_printf(f, "%*s", indent + 2, "");
922            Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
923          }
924    
925          if (node->pn_kid3) {
926            instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
927          }
928    
929          Stream_printf(f, "%*s", indent, "");
930          Stream_write_string(f, "}\n");
931      }      }
932    
933      break;      break;
934      }
935    case TOK_SWITCH:    case TOK_SWITCH:
936      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
937      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
938      fprintf(f, "switch (");      Stream_write_string(f, "switch (");
939      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
940      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
941      for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {      {
942        fprintf(f, "%*s", indent, "");        JSParseNode * list = node->pn_right;
943        switch (p->pn_type) {        if (list->pn_type == TOK_LEXICALSCOPE) {
944        case TOK_CASE:          list = list->pn_expr;
945          fprintf(f, "case ");        }
946          instrument_expression(p->pn_left, f);        for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
947          fprintf(f, ":\n");          Stream_printf(f, "%*s", indent, "");
948          break;          switch (p->pn_type) {
949        case TOK_DEFAULT:          case TOK_CASE:
950          fprintf(f, "default:\n");            Stream_write_string(f, "case ");
951          break;            instrument_expression(p->pn_left, f);
952        default:            Stream_write_string(f, ":\n");
953          abort();            break;
954          break;          case TOK_DEFAULT:
955              Stream_write_string(f, "default:\n");
956              break;
957            default:
958              abort();
959              break;
960            }
961            instrument_statement(p->pn_right, f, indent + 2, false);
962        }        }
       instrument_statement(p->pn_right, f, indent + 2);  
963      }      }
964      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
965      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
966      break;      break;
967    case TOK_CASE:    case TOK_CASE:
968    case TOK_DEFAULT:    case TOK_DEFAULT:
# Line 595  Line 970 
970      break;      break;
971    case TOK_WHILE:    case TOK_WHILE:
972      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
973      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
974      fprintf(f, "while (");      Stream_write_string(f, "while (");
975      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
976      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
977      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
978      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
979      break;      break;
980    case TOK_DO:    case TOK_DO:
981      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
982      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
983      fprintf(f, "do {\n");      Stream_write_string(f, "do {\n");
984      instrument_statement(node->pn_left, f, indent + 2);      instrument_statement(node->pn_left, f, indent + 2, false);
985      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
986      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
987      fprintf(f, "while (");      Stream_write_string(f, "while (");
988      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
989      fprintf(f, ");\n");      Stream_write_string(f, ");\n");
990      break;      break;
991    case TOK_FOR:    case TOK_FOR:
992      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
993      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     fprintf(f, "for (");  
994      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
995      case TOK_IN:      case TOK_IN:
996        /* for/in */        /* for/in */
997        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
998        switch (node->pn_left->pn_left->pn_type) {        output_for_in(node, f);
       case TOK_VAR:  
         instrument_var_statement(node->pn_left->pn_left, f, 0);  
         break;  
       case TOK_NAME:  
         instrument_expression(node->pn_left->pn_left, f);  
         break;  
       default:  
         /* this is undocumented: for (x.value in y) */  
         instrument_expression(node->pn_left->pn_left, f);  
         break;  
 /*  
       default:  
         fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);  
         abort();  
         break;  
 */  
       }  
       fprintf(f, " in ");  
       instrument_expression(node->pn_left->pn_right, f);  
999        break;        break;
1000      case TOK_RESERVED:      case TOK_RESERVED:
1001        /* for (;;) */        /* for (;;) */
1002        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
1003          Stream_write_string(f, "for (");
1004        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
1005          if (node->pn_left->pn_kid1->pn_type == TOK_VAR) {          instrument_expression(node->pn_left->pn_kid1, f);
           instrument_var_statement(node->pn_left->pn_kid1, f, 0);  
         }  
         else {  
           instrument_expression(node->pn_left->pn_kid1, f);  
         }  
1006        }        }
1007        fprintf(f, ";");        Stream_write_string(f, ";");
1008        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
1009          fputc(' ', f);          Stream_write_char(f, ' ');
1010          instrument_expression(node->pn_left->pn_kid2, f);          instrument_expression(node->pn_left->pn_kid2, f);
1011        }        }
1012        fprintf(f, ";");        Stream_write_string(f, ";");
1013        if (node->pn_left->pn_kid3) {        if (node->pn_left->pn_kid3) {
1014          fputc(' ', f);          Stream_write_char(f, ' ');
1015          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
1016        }        }
1017          Stream_write_char(f, ')');
1018        break;        break;
1019      default:      default:
1020        abort();        abort();
1021        break;        break;
1022      }      }
1023      fprintf(f, ") {\n");      Stream_write_string(f, " {\n");
1024      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1025      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1026      break;      break;
1027    case TOK_THROW:    case TOK_THROW:
1028      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1029      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1030      fprintf(f, "throw ");      Stream_write_string(f, "throw ");
1031      instrument_expression(node->pn_u.unary.kid, f);      instrument_expression(node->pn_u.unary.kid, f);
1032      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1033      break;      break;
1034    case TOK_TRY:    case TOK_TRY:
1035      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1036      fprintf(f, "try {\n");      Stream_write_string(f, "try {\n");
1037      instrument_statement(node->pn_kid1, f, indent + 2);      instrument_statement(node->pn_kid1, f, indent + 2, false);
1038      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1039      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1040      {      if (node->pn_kid2) {
1041        for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {        assert(node->pn_kid2->pn_type == TOK_RESERVED);
1042          for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
1043            assert(scope->pn_type == TOK_LEXICALSCOPE);
1044            JSParseNode * catch = scope->pn_expr;
1045          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
1046          fprintf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
1047          fprintf(f, "catch (");          Stream_write_string(f, "catch (");
1048            /* this may not be a name - destructuring assignment */
1049            /*
1050          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
1051          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
1052          if (catch->pn_kid1->pn_expr) {          */
1053            fprintf(f, " if ");          instrument_expression(catch->pn_kid1, f);
1054            instrument_expression(catch->pn_kid1->pn_expr, f);          if (catch->pn_kid2) {
1055          }            Stream_write_string(f, " if ");
1056          fprintf(f, ") {\n");            instrument_expression(catch->pn_kid2, f);
1057          instrument_statement(catch->pn_kid3, f, indent + 2);          }
1058          fprintf(f, "%*s", indent, "");          Stream_write_string(f, ") {\n");
1059          fprintf(f, "}\n");          instrument_statement(catch->pn_kid3, f, indent + 2, false);
1060            Stream_printf(f, "%*s", indent, "");
1061            Stream_write_string(f, "}\n");
1062        }        }
1063      }      }
1064      if (node->pn_kid3) {      if (node->pn_kid3) {
1065        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1066        fprintf(f, "finally {\n");        Stream_write_string(f, "finally {\n");
1067        instrument_statement(node->pn_kid3, f, indent + 2);        instrument_statement(node->pn_kid3, f, indent + 2, false);
1068        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1069        fprintf(f, "}\n");        Stream_write_string(f, "}\n");
1070      }      }
1071      break;      break;
1072    case TOK_CATCH:    case TOK_CATCH:
# Line 716  Line 1075 
1075    case TOK_BREAK:    case TOK_BREAK:
1076    case TOK_CONTINUE:    case TOK_CONTINUE:
1077      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1078      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1079      fputs(node->pn_type == TOK_BREAK? "break": "continue", f);      Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1080      JSAtom * atom = node->pn_u.name.atom;      JSAtom * atom = node->pn_u.name.atom;
1081      if (atom != NULL) {      if (atom != NULL) {
1082        fputc(' ', f);        Stream_write_char(f, ' ');
1083        print_string_atom(node->pn_atom, f);        print_string_atom(node->pn_atom, f);
1084      }      }
1085      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1086      break;      break;
1087    case TOK_WITH:    case TOK_WITH:
1088      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
1089      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1090      fprintf(f, "with (");      Stream_write_string(f, "with (");
1091      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
1092      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
1093      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1094      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1095      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1096      break;      break;
1097    case TOK_VAR:    case TOK_VAR:
1098      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1099      fprintf(f, ";\n");      instrument_expression(node, f);
1100        Stream_write_string(f, ";\n");
1101      break;      break;
1102    case TOK_RETURN:    case TOK_RETURN:
1103      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1104      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1105      fprintf(f, "return");      Stream_write_string(f, "return");
1106      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1107        fprintf(f, " ");        Stream_write_char(f, ' ');
1108        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1109      }      }
1110      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1111      break;      break;
1112    case TOK_SEMI:    case TOK_SEMI:
1113      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1114      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1115      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1116        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1117      }      }
1118      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1119      break;      break;
1120    case TOK_COLON:    case TOK_COLON:
1121      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
# Line 763  Line 1123 
1123      This one is tricky: can't output instrumentation between the label and the      This one is tricky: can't output instrumentation between the label and the
1124      statement it's supposed to label ...      statement it's supposed to label ...
1125      */      */
1126      fprintf(f, "%*s", indent < 2? 0: indent - 2, "");      Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1127      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
1128      fprintf(f, ":\n");      Stream_write_string(f, ":\n");
1129      /*      /*
1130      ... use output_statement instead of instrument_statement.      ... use output_statement instead of instrument_statement.
1131      */      */
1132      output_statement(node->pn_expr, f, indent);      output_statement(node->pn_expr, f, indent, false);
1133        break;
1134      case TOK_LEXICALSCOPE:
1135        /* let statement */
1136        assert(node->pn_arity == PN_NAME);
1137        switch (node->pn_expr->pn_type) {
1138        case TOK_LET:
1139          /* let statement */
1140          assert(node->pn_expr->pn_arity == PN_BINARY);
1141          instrument_statement(node->pn_expr, f, indent, false);
1142          break;
1143        case TOK_LC:
1144          /* block */
1145          Stream_printf(f, "%*s", indent, "");
1146          Stream_write_string(f, "{\n");
1147          instrument_statement(node->pn_expr, f, indent + 2, false);
1148          Stream_printf(f, "%*s", indent, "");
1149          Stream_write_string(f, "}\n");
1150          break;
1151        case TOK_FOR:
1152          instrument_statement(node->pn_expr, f, indent, false);
1153          break;
1154        default:
1155          abort();
1156          break;
1157        }
1158        break;
1159      case TOK_LET:
1160        switch (node->pn_arity) {
1161        case PN_BINARY:
1162          /* let statement */
1163          Stream_printf(f, "%*s", indent, "");
1164          Stream_write_string(f, "let (");
1165          assert(node->pn_left->pn_type == TOK_LP);
1166          assert(node->pn_left->pn_arity == PN_LIST);
1167          instrument_declarations(node->pn_left, f);
1168          Stream_write_string(f, ") {\n");
1169          instrument_statement(node->pn_right, f, indent + 2, false);
1170          Stream_printf(f, "%*s", indent, "");
1171          Stream_write_string(f, "}\n");
1172          break;
1173        case PN_LIST:
1174          /* let definition */
1175          Stream_printf(f, "%*s", indent, "");
1176          instrument_expression(node, f);
1177          Stream_write_string(f, ";\n");
1178          break;
1179        default:
1180          abort();
1181          break;
1182        }
1183        break;
1184      case TOK_DEBUGGER:
1185        Stream_printf(f, "%*s", indent, "");
1186        Stream_write_string(f, "debugger;\n");
1187      break;      break;
1188    default:    default:
1189      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
1190    }    }
1191  }  }
1192    
# Line 781  Line 1195 
1195  TOK_FUNCTION is handled as a statement and as an expression.  TOK_FUNCTION is handled as a statement and as an expression.
1196  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1197  */  */
1198  static void instrument_statement(JSParseNode * node, FILE * f, int indent) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1199    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1200      int line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1201        if (line > num_lines) {
1202          fatal("file %s contains more than 65,535 lines", file_id);
1203        }
1204    
1205      /* the root node has line number 0 */      /* the root node has line number 0 */
1206      if (line != 0) {      if (line != 0) {
1207        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1208        fprintf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);        Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1209        lines[line - 1] = 1;        lines[line - 1] = 1;
1210      }      }
1211    }    }
1212    output_statement(node, f, indent);    output_statement(node, f, indent, is_jscoverage_if);
1213  }  }
1214    
1215  static void instrument_js_stream(const char * id, int line, FILE * input, FILE * output, const char * temporary_file_name) {  static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1216    file_id = id;    const jschar * characters_end = characters + line_end;
1217      const jschar * cp = characters + line_start;
1218      const char * bp = prefix;
1219      for (;;) {
1220        if (*bp == '\0') {
1221          return true;
1222        }
1223        else if (cp == characters_end) {
1224          return false;
1225        }
1226        else if (*cp != *bp) {
1227          return false;
1228        }
1229        bp++;
1230        cp++;
1231      }
1232    }
1233    
1234    /* scan the javascript */  static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1235    JSTokenStream * token_stream = js_NewFileTokenStream(context, NULL, input);    /* XXX - other Unicode space */
1236    if (token_stream == NULL) {    const jschar * end = characters + line_end;
1237      fatal("cannot create token stream from file: %s", file_id);    for (const jschar * p = characters + line_start; p < end; p++) {
1238        jschar c = *p;
1239        if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1240          continue;
1241        }
1242        else {
1243          return false;
1244        }
1245    }    }
1246      return true;
1247    }
1248    
1249    static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1250      warn_source(file_id, report->lineno, "%s", message);
1251    }
1252    
1253    void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1254      file_id = id;
1255    
1256    /* parse the javascript */    /* parse the javascript */
1257    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);    JSParseContext parse_context;
1258      if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1259        fatal("cannot create token stream from file %s", file_id);
1260      }
1261      JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1262      JSParseNode * node = js_ParseScript(context, global, &parse_context);
1263    if (node == NULL) {    if (node == NULL) {
1264      fatal("parse error in file: %s", file_id);      js_ReportUncaughtException(context);
1265        fatal("parse error in file %s", file_id);
1266    }    }
1267    int num_lines = node->pn_pos.end.lineno;    JS_SetErrorReporter(context, old_error_reporter);
1268      num_lines = node->pn_pos.end.lineno;
1269    lines = xmalloc(num_lines);    lines = xmalloc(num_lines);
1270    for (int i = 0; i < num_lines; i++) {    for (unsigned int i = 0; i < num_lines; i++) {
1271      lines[i] = 0;      lines[i] = 0;
1272    }    }
1273    
1274      /* search code for conditionals */
1275      exclusive_directives = xnew(bool, num_lines);
1276      for (unsigned int i = 0; i < num_lines; i++) {
1277        exclusive_directives[i] = false;
1278      }
1279    
1280      bool has_conditionals = false;
1281      struct IfDirective * if_directives = NULL;
1282      size_t line_number = 0;
1283      size_t i = 0;
1284      while (i < num_characters) {
1285        if (line_number == UINT16_MAX) {
1286          fatal("file %s contains more than 65,535 lines", file_id);
1287        }
1288        line_number++;
1289        size_t line_start = i;
1290        jschar c;
1291        bool done = false;
1292        while (! done && i < num_characters) {
1293          c = characters[i];
1294          switch (c) {
1295          case '\r':
1296          case '\n':
1297          case 0x2028:
1298          case 0x2029:
1299            done = true;
1300            break;
1301          default:
1302            i++;
1303          }
1304        }
1305        size_t line_end = i;
1306        if (i < num_characters) {
1307          i++;
1308          if (c == '\r' && i < num_characters && characters[i] == '\n') {
1309            i++;
1310          }
1311        }
1312    
1313        if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1314          has_conditionals = true;
1315    
1316          if (characters_are_white_space(characters, line_start + 16, line_end)) {
1317            exclusive_directives[line_number - 1] = true;
1318          }
1319          else {
1320            struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1321            if_directive->condition_start = characters + line_start + 16;
1322            if_directive->condition_end = characters + line_end;
1323            if_directive->start_line = line_number;
1324            if_directive->end_line = 0;
1325            if_directive->next = if_directives;
1326            if_directives = if_directive;
1327          }
1328        }
1329        else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1330          for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1331            if (p->end_line == 0) {
1332              p->end_line = line_number;
1333              break;
1334            }
1335          }
1336        }
1337      }
1338    
1339    /*    /*
1340    Create a temporary file - we can't write directly to the output because we    An instrumented JavaScript file has 4 sections:
1341    need to know the line number info first.    1. initialization
1342      2. instrumented source code
1343      3. conditionals
1344      4. original source code
1345    */    */
   FILE * temporary = fopen(temporary_file_name, "w+");  
   if (temporary == NULL) {  
     fatal("cannot create temporary file for script: %s", file_id);  
   }  
1346    
1347    /* write instrumented javascript to the temporary */    Stream * instrumented = Stream_new(0);
1348    instrument_statement(node, temporary, 0);    instrument_statement(node, instrumented, 0, false);
1349      js_FinishParseContext(context, &parse_context);
1350    
1351    /* write line number info to the output */    /* write line number info to the output */
1352    fprintf(output, "/* automatically generated by JSCoverage - do not edit */\n");    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1353    fprintf(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");    if (jscoverage_mozilla) {
1354    fprintf(output, "var _$jscoverage = top._$jscoverage;\n");      Stream_write_string(output, "try {\n");
1355    fprintf(output, "if (! _$jscoverage['%s']) {\n", file_id);      Stream_write_string(output, "  Components.utils.import('resource://gre/modules/jscoverage.jsm');\n");
1356    fprintf(output, "  _$jscoverage['%s'] = [];\n", file_id);      Stream_printf(output, "  dump('%s: successfully imported jscoverage module\\n');\n", id);
1357        Stream_write_string(output, "}\n");
1358        Stream_write_string(output, "catch (e) {\n");
1359        Stream_write_string(output, "  _$jscoverage = {};\n");
1360        Stream_printf(output, "  dump('%s: failed to import jscoverage module - coverage not available for this file\\n');\n", id);
1361        Stream_write_string(output, "}\n");
1362      }
1363      else {
1364        Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");
1365        Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1366      }
1367      Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1368      Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);
1369    for (int i = 0; i < num_lines; i++) {    for (int i = 0; i < num_lines; i++) {
1370      if (lines[i]) {      if (lines[i]) {
1371        fprintf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);        Stream_printf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1372      }      }
1373    }    }
1374    fprintf(output, "}\n");    Stream_write_string(output, "}\n");
1375      free(lines);
1376    lines = NULL;    lines = NULL;
1377      free(exclusive_directives);
1378      exclusive_directives = NULL;
1379    
1380      /* conditionals */
1381      if (has_conditionals) {
1382        Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1383      }
1384    
1385    /* copy the temporary to the output */    /* copy the instrumented source code to the output */
1386    fseek(temporary, 0, SEEK_SET);    Stream_write(output, instrumented->data, instrumented->length);
   copy_stream(temporary, output);  
1387    
1388    fclose(temporary);    /* conditionals */
1389      for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1390        Stream_write_string(output, "if (!(");
1391        print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1392        Stream_write_string(output, ")) {\n");
1393        Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1394        Stream_write_string(output, "}\n");
1395      }
1396    
1397      /* free */
1398      while (if_directives != NULL) {
1399        struct IfDirective * if_directive = if_directives;
1400        if_directives = if_directives->next;
1401        free(if_directive);
1402      }
1403    
1404      /* copy the original source to the output */
1405      Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1406      jscoverage_write_source(id, characters, num_characters, output);
1407      Stream_printf(output, ";\n");
1408    
1409      Stream_delete(instrumented);
1410    
1411    file_id = NULL;    file_id = NULL;
1412  }  }
1413    
1414  void jscoverage_instrument_js(const char * id, FILE * input, FILE * output, const char * temporary_file_name) {  void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1415    instrument_js_stream(id, 0, input, output, temporary_file_name);    Stream_write_string(output, "[");
1416      if (jscoverage_highlight) {
1417        Stream * highlighted_stream = Stream_new(num_characters);
1418        jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1419        size_t i = 0;
1420        while (i < highlighted_stream->length) {
1421          if (i > 0) {
1422            Stream_write_char(output, ',');
1423          }
1424    
1425          Stream_write_char(output, '"');
1426          bool done = false;
1427          while (! done) {
1428            char c = highlighted_stream->data[i];
1429            switch (c) {
1430            case 0x8:
1431              /* backspace */
1432              Stream_write_string(output, "\\b");
1433              break;
1434            case 0x9:
1435              /* horizontal tab */
1436              Stream_write_string(output, "\\t");
1437              break;
1438            case 0xa:
1439              /* line feed (new line) */
1440              done = true;
1441              break;
1442            /* IE doesn't support this */
1443            /*
1444            case 0xb:
1445              Stream_write_string(output, "\\v");
1446              break;
1447            */
1448            case 0xc:
1449              /* form feed */
1450              Stream_write_string(output, "\\f");
1451              break;
1452            case 0xd:
1453              /* carriage return */
1454              done = true;
1455              if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1456                i++;
1457              }
1458              break;
1459            case '"':
1460              Stream_write_string(output, "\\\"");
1461              break;
1462            case '\\':
1463              Stream_write_string(output, "\\\\");
1464              break;
1465            default:
1466              Stream_write_char(output, c);
1467              break;
1468            }
1469            i++;
1470            if (i >= highlighted_stream->length) {
1471              done = true;
1472            }
1473          }
1474          Stream_write_char(output, '"');
1475        }
1476        Stream_delete(highlighted_stream);
1477      }
1478      else {
1479        size_t i = 0;
1480        while (i < num_characters) {
1481          if (i > 0) {
1482            Stream_write_char(output, ',');
1483          }
1484    
1485          Stream_write_char(output, '"');
1486          bool done = false;
1487          while (! done) {
1488            jschar c = characters[i];
1489            switch (c) {
1490            case 0x8:
1491              /* backspace */
1492              Stream_write_string(output, "\\b");
1493              break;
1494            case 0x9:
1495              /* horizontal tab */
1496              Stream_write_string(output, "\\t");
1497              break;
1498            case 0xa:
1499              /* line feed (new line) */
1500              done = true;
1501              break;
1502            /* IE doesn't support this */
1503            /*
1504            case 0xb:
1505              Stream_write_string(output, "\\v");
1506              break;
1507            */
1508            case 0xc:
1509              /* form feed */
1510              Stream_write_string(output, "\\f");
1511              break;
1512            case 0xd:
1513              /* carriage return */
1514              done = true;
1515              if (i + 1 < num_characters && characters[i + 1] == '\n') {
1516                i++;
1517              }
1518              break;
1519            case '"':
1520              Stream_write_string(output, "\\\"");
1521              break;
1522            case '\\':
1523              Stream_write_string(output, "\\\\");
1524              break;
1525            case '&':
1526              Stream_write_string(output, "&amp;");
1527              break;
1528            case '<':
1529              Stream_write_string(output, "&lt;");
1530              break;
1531            case '>':
1532              Stream_write_string(output, "&gt;");
1533              break;
1534            case 0x2028:
1535            case 0x2029:
1536              done = true;
1537              break;
1538            default:
1539              if (32 <= c && c <= 126) {
1540                Stream_write_char(output, c);
1541              }
1542              else {
1543                Stream_printf(output, "&#%d;", c);
1544              }
1545              break;
1546            }
1547            i++;
1548            if (i >= num_characters) {
1549              done = true;
1550            }
1551          }
1552          Stream_write_char(output, '"');
1553        }
1554      }
1555      Stream_write_string(output, "]");
1556    }
1557    
1558    void jscoverage_copy_resources(const char * destination_directory) {
1559      copy_resource("jscoverage.html", destination_directory);
1560      copy_resource("jscoverage.css", destination_directory);
1561      copy_resource("jscoverage.js", destination_directory);
1562      copy_resource("jscoverage-ie.css", destination_directory);
1563      copy_resource("jscoverage-throbber.gif", destination_directory);
1564      copy_resource("jscoverage-highlight.css", destination_directory);
1565    }
1566    
1567    /*
1568    coverage reports
1569    */
1570    
1571    struct FileCoverageList {
1572      FileCoverage * file_coverage;
1573      struct FileCoverageList * next;
1574    };
1575    
1576    struct Coverage {
1577      JSHashTable * coverage_table;
1578      struct FileCoverageList * coverage_list;
1579    };
1580    
1581    static int compare_strings(const void * p1, const void * p2) {
1582      return strcmp(p1, p2) == 0;
1583    }
1584    
1585    Coverage * Coverage_new(void) {
1586      Coverage * result = xmalloc(sizeof(Coverage));
1587      result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1588      if (result->coverage_table == NULL) {
1589        fatal("cannot create hash table");
1590      }
1591      result->coverage_list = NULL;
1592      return result;
1593    }
1594    
1595    void Coverage_delete(Coverage * coverage) {
1596      JS_HashTableDestroy(coverage->coverage_table);
1597      struct FileCoverageList * p = coverage->coverage_list;
1598      while (p != NULL) {
1599        free(p->file_coverage->coverage_lines);
1600        if (p->file_coverage->source_lines != NULL) {
1601          for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1602            free(p->file_coverage->source_lines[i]);
1603          }
1604          free(p->file_coverage->source_lines);
1605        }
1606        free(p->file_coverage->id);
1607        free(p->file_coverage);
1608        struct FileCoverageList * q = p;
1609        p = p->next;
1610        free(q);
1611      }
1612      free(coverage);
1613    }
1614    
1615    struct EnumeratorArg {
1616      CoverageForeachFunction f;
1617      void * p;
1618    };
1619    
1620    static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1621      struct EnumeratorArg * enumerator_arg = arg;
1622      enumerator_arg->f(entry->value, i, enumerator_arg->p);
1623      return 0;
1624    }
1625    
1626    void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1627      struct EnumeratorArg enumerator_arg;
1628      enumerator_arg.f = f;
1629      enumerator_arg.p = p;
1630      JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1631    }
1632    
1633    int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1634      int result = 0;
1635    
1636      jschar * base = js_InflateString(context, (char *) json, &length);
1637      if (base == NULL) {
1638        fatal("out of memory");
1639      }
1640    
1641      jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1642      parenthesized_json[0] = '(';
1643      memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1644      parenthesized_json[length + 1] = ')';
1645    
1646      JS_free(context, base);
1647    
1648      JSParseContext parse_context;
1649      if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1650        free(parenthesized_json);
1651        return -1;
1652      }
1653      JSParseNode * root = js_ParseScript(context, global, &parse_context);
1654      free(parenthesized_json);
1655      if (root == NULL) {
1656        result = -1;
1657        goto done;
1658      }
1659    
1660      /* root node must be TOK_LC */
1661      if (root->pn_type != TOK_LC) {
1662        result = -1;
1663        goto done;
1664      }
1665      JSParseNode * semi = root->pn_u.list.head;
1666    
1667      /* the list must be TOK_SEMI and it must contain only one element */
1668      if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1669        result = -1;
1670        goto done;
1671      }
1672      JSParseNode * parenthesized = semi->pn_kid;
1673    
1674      /* this must be a parenthesized expression */
1675      if (parenthesized->pn_type != TOK_RP) {
1676        result = -1;
1677        goto done;
1678      }
1679      JSParseNode * object = parenthesized->pn_kid;
1680    
1681      /* this must be an object literal */
1682      if (object->pn_type != TOK_RC) {
1683        result = -1;
1684        goto done;
1685      }
1686    
1687      for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1688        /* every element of this list must be TOK_COLON */
1689        if (p->pn_type != TOK_COLON) {
1690          result = -1;
1691          goto done;
1692        }
1693    
1694        /* the key must be a string representing the file */
1695        JSParseNode * key = p->pn_left;
1696        if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1697          result = -1;
1698          goto done;
1699        }
1700        char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1701    
1702        /* the value must be an object literal OR an array */
1703        JSParseNode * value = p->pn_right;
1704        if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1705          result = -1;
1706          goto done;
1707        }
1708    
1709        JSParseNode * array = NULL;
1710        JSParseNode * source = NULL;
1711        if (value->pn_type == TOK_RB) {
1712          /* an array */
1713          array = value;
1714        }
1715        else if (value->pn_type == TOK_RC) {
1716          /* an object literal */
1717          if (value->pn_count != 2) {
1718            result = -1;
1719            goto done;
1720          }
1721          for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1722            if (element->pn_type != TOK_COLON) {
1723              result = -1;
1724              goto done;
1725            }
1726            JSParseNode * left = element->pn_left;
1727            if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1728              result = -1;
1729              goto done;
1730            }
1731            const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1732            if (strcmp(s, "coverage") == 0) {
1733              array = element->pn_right;
1734              if (array->pn_type != TOK_RB) {
1735                result = -1;
1736                goto done;
1737              }
1738            }
1739            else if (strcmp(s, "source") == 0) {
1740              source = element->pn_right;
1741              if (source->pn_type != TOK_RB) {
1742                result = -1;
1743                goto done;
1744              }
1745            }
1746            else {
1747              result = -1;
1748              goto done;
1749            }
1750          }
1751        }
1752        else {
1753          result = -1;
1754          goto done;
1755        }
1756    
1757        if (array == NULL) {
1758          result = -1;
1759          goto done;
1760        }
1761    
1762        /* look up the file in the coverage table */
1763        FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1764        if (file_coverage == NULL) {
1765          /* not there: create a new one */
1766          char * id = xstrdup(id_bytes);
1767          file_coverage = xmalloc(sizeof(FileCoverage));
1768          file_coverage->id = id;
1769          file_coverage->num_coverage_lines = array->pn_count;
1770          file_coverage->coverage_lines = xnew(int, array->pn_count);
1771          file_coverage->source_lines = NULL;
1772    
1773          /* set coverage for all lines */
1774          uint32 i = 0;
1775          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1776            if (element->pn_type == TOK_NUMBER) {
1777              file_coverage->coverage_lines[i] = (int) element->pn_dval;
1778            }
1779            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1780              file_coverage->coverage_lines[i] = -1;
1781            }
1782            else {
1783              result = -1;
1784              goto done;
1785            }
1786          }
1787          assert(i == array->pn_count);
1788    
1789          /* add to the hash table */
1790          JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1791          struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1792          coverage_list->file_coverage = file_coverage;
1793          coverage_list->next = coverage->coverage_list;
1794          coverage->coverage_list = coverage_list;
1795        }
1796        else {
1797          /* sanity check */
1798          assert(strcmp(file_coverage->id, id_bytes) == 0);
1799          if (file_coverage->num_coverage_lines != array->pn_count) {
1800            result = -2;
1801            goto done;
1802          }
1803    
1804          /* merge the coverage */
1805          uint32 i = 0;
1806          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1807            if (element->pn_type == TOK_NUMBER) {
1808              if (file_coverage->coverage_lines[i] == -1) {
1809                result = -2;
1810                goto done;
1811              }
1812              file_coverage->coverage_lines[i] += (int) element->pn_dval;
1813            }
1814            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1815              if (file_coverage->coverage_lines[i] != -1) {
1816                result = -2;
1817                goto done;
1818              }
1819            }
1820            else {
1821              result = -1;
1822              goto done;
1823            }
1824          }
1825          assert(i == array->pn_count);
1826        }
1827    
1828        /* if this JSON file has source, use it */
1829        if (file_coverage->source_lines == NULL && source != NULL) {
1830          file_coverage->num_source_lines = source->pn_count;
1831          file_coverage->source_lines = xnew(char *, source->pn_count);
1832          uint32 i = 0;
1833          for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1834            if (element->pn_type != TOK_STRING) {
1835              result = -1;
1836              goto done;
1837            }
1838            file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1839          }
1840          assert(i == source->pn_count);
1841        }
1842      }
1843    
1844    done:
1845      js_FinishParseContext(context, &parse_context);
1846      return result;
1847  }  }

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