/[jscoverage]/trunk/instrument-js.c
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revision 87 by siliconforks, Mon May 5 20:05:27 2008 UTC revision 370 by siliconforks, Mon Oct 27 20:34:27 2008 UTC
# 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_atom(JSAtom * atom, FILE * f) {  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, 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        Stream_write_char(f, ' ');
344        print_string_atom(function->atom, f);
345      }
346    
347      /*
348      function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
349      js_DecompileFunction in jsopcode.cpp
350      */
351      Stream_write_string(f, "(");
352      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      }      }
360      for (int i = 0; i < function->nargs; i++) {    }
361        assert(params[i] != NULL);    for (int i = 0; i < function->nargs; i++) {
362        if (i > 0) {      if (i > 0) {
363          fprintf(f, ", ");        Stream_write_string(f, ", ");
364        }      }
365        if (ATOM_IS_STRING(params[i])) {      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
366          print_string_atom(params[i], f);      if (param == NULL) {
367        }        fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported parameter type for function");
368      }      }
369      fprintf(f, ") {\n");      print_string_atom(param, f);
370      free(params);    }
371      JS_FinishArenaPool(&pool);
372      Stream_write_string(f, ") {\n");
373    
374      /* function body */    /* function body */
375      instrument_statement(node->pn_body, f, indent + 2);    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    
383      fprintf(f, "}\n");    Stream_write_string(f, "}\n");
384  }  }
385    
386  static void instrument_function_call(JSParseNode * node, FILE * f) {  static void instrument_function_call(JSParseNode * node, Stream * f) {
387    instrument_expression(node->pn_head, f);    JSParseNode * function_node = node->pn_head;
388    fputc('(', f);    if (function_node->pn_type == TOK_FUNCTION) {
389    for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {      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          output_array_comprehension_or_generator_expression(function_node->pn_body, f);
399          Stream_write_char(f, ')');
400          return;
401        }
402        else {
403          Stream_write_char(f, '(');
404          instrument_expression(function_node, f);
405          Stream_write_char(f, ')');
406        }
407      }
408      else {
409        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) {      if (p != node->pn_head->pn_next) {
414        fprintf(f, ", ");        Stream_write_string(f, ", ");
415      }      }
416      instrument_expression(p, f);      instrument_expression(p, f);
417    }    }
418    fputc(')', f);    Stream_write_char(f, ')');
419    }
420    
421    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        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        }
446      }
447  }  }
448    
449  /*  /*
# Line 222  Line 459 
459  TOK_INSTANCEOF  binary  TOK_INSTANCEOF  binary
460  TOK_IN          binary  TOK_IN          binary
461  */  */
462  static void instrument_expression(JSParseNode * node, FILE * f) {  static void instrument_expression(JSParseNode * node, Stream * f) {
463    switch (node->pn_type) {    switch (node->pn_type) {
464    case TOK_FUNCTION:    case TOK_FUNCTION:
465      instrument_function(node, f, 0);      instrument_function(node, f, 0, FUNCTION_NORMAL);
466      break;      break;
467    case TOK_COMMA:    case TOK_COMMA:
468      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) {
469        if (p != node->pn_head) {        if (p != node->pn_head) {
470          fprintf(f, ", ");          Stream_write_string(f, ", ");
471        }        }
472        instrument_expression(p, f);        instrument_expression(p, f);
473      }      }
474      break;      break;
475    case TOK_ASSIGN:    case TOK_ASSIGN:
476      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
477      fputc(' ', f);      Stream_write_char(f, ' ');
478      switch (node->pn_op) {      switch (node->pn_op) {
479      case JSOP_ADD:      case JSOP_ADD:
480      case JSOP_SUB:      case JSOP_SUB:
# Line 250  Line 487 
487      case JSOP_BITOR:      case JSOP_BITOR:
488      case JSOP_BITXOR:      case JSOP_BITXOR:
489      case JSOP_DIV:      case JSOP_DIV:
490        fprintf(f, "%s", get_op(node->pn_op));        Stream_printf(f, "%s", get_op(node->pn_op));
491        break;        break;
492      default:      default:
493        /* do nothing - it must be a simple assignment */        /* do nothing - it must be a simple assignment */
494        break;        break;
495      }      }
496      fprintf(f, "= ");      Stream_write_string(f, "= ");
497      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
498      break;      break;
499    case TOK_HOOK:    case TOK_HOOK:
500      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
501      fprintf(f, "? ");      Stream_write_string(f, "? ");
502      instrument_expression(node->pn_kid2, f);      instrument_expression(node->pn_kid2, f);
503      fprintf(f, ": ");      Stream_write_string(f, ": ");
504      instrument_expression(node->pn_kid3, f);      instrument_expression(node->pn_kid3, f);
505      break;      break;
506    case TOK_OR:    case TOK_OR:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " || ");  
     instrument_expression(node->pn_right, f);  
     break;  
507    case TOK_AND:    case TOK_AND:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " && ");  
     instrument_expression(node->pn_right, f);  
     break;  
508    case TOK_BITOR:    case TOK_BITOR:
509    case TOK_BITXOR:    case TOK_BITXOR:
510    case TOK_BITAND:    case TOK_BITAND:
# Line 289  Line 518 
518      switch (node->pn_arity) {      switch (node->pn_arity) {
519      case PN_BINARY:      case PN_BINARY:
520        instrument_expression(node->pn_left, f);        instrument_expression(node->pn_left, f);
521        fprintf(f, " %s ", get_op(node->pn_op));        Stream_printf(f, " %s ", get_op(node->pn_op));
522        instrument_expression(node->pn_right, f);        instrument_expression(node->pn_right, f);
523        break;        break;
524      case PN_LIST:      case PN_LIST:
525        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) {
526          if (p != node->pn_head) {          if (p != node->pn_head) {
527            fprintf(f, " %s ", get_op(node->pn_op));            Stream_printf(f, " %s ", get_op(node->pn_op));
528          }          }
529          instrument_expression(p, f);          instrument_expression(p, f);
530        }        }
# Line 307  Line 536 
536    case TOK_UNARYOP:    case TOK_UNARYOP:
537      switch (node->pn_op) {      switch (node->pn_op) {
538      case JSOP_NEG:      case JSOP_NEG:
539        fputc('-', f);        Stream_write_char(f, '-');
540        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
541        break;        break;
542      case JSOP_POS:      case JSOP_POS:
543        fputc('+', f);        Stream_write_char(f, '+');
544        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
545        break;        break;
546      case JSOP_NOT:      case JSOP_NOT:
547        fputc('!', f);        Stream_write_char(f, '!');
548        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
549        break;        break;
550      case JSOP_BITNOT:      case JSOP_BITNOT:
551        fputc('~', f);        Stream_write_char(f, '~');
552        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
553        break;        break;
554      case JSOP_TYPEOF:      case JSOP_TYPEOF:
555        fprintf(f, "typeof ");        Stream_write_string(f, "typeof ");
556        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
557        break;        break;
558      case JSOP_VOID:      case JSOP_VOID:
559        fprintf(f, "void ");        Stream_write_string(f, "void ");
560        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
561        break;        break;
562      default:      default:
563        abort();        fatal_source(file_id, node->pn_pos.begin.lineno, "unknown operator (%d)", node->pn_op);
564        break;        break;
565      }      }
566      break;      break;
# Line 344  Line 573 
573      case JSOP_INCNAME:      case JSOP_INCNAME:
574      case JSOP_INCPROP:      case JSOP_INCPROP:
575      case JSOP_INCELEM:      case JSOP_INCELEM:
576        fprintf(f, "++");        Stream_write_string(f, "++");
577        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
578        break;        break;
579      case JSOP_DECNAME:      case JSOP_DECNAME:
580      case JSOP_DECPROP:      case JSOP_DECPROP:
581      case JSOP_DECELEM:      case JSOP_DECELEM:
582        fprintf(f, "--");        Stream_write_string(f, "--");
583        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
584        break;        break;
585      case JSOP_NAMEINC:      case JSOP_NAMEINC:
586      case JSOP_PROPINC:      case JSOP_PROPINC:
587      case JSOP_ELEMINC:      case JSOP_ELEMINC:
588        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
589        fprintf(f, "++");        Stream_write_string(f, "++");
590        break;        break;
591      case JSOP_NAMEDEC:      case JSOP_NAMEDEC:
592      case JSOP_PROPDEC:      case JSOP_PROPDEC:
593      case JSOP_ELEMDEC:      case JSOP_ELEMDEC:
594        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
595        fprintf(f, "--");        Stream_write_string(f, "--");
596        break;        break;
597      default:      default:
598        abort();        abort();
# Line 371  Line 600 
600      }      }
601      break;      break;
602    case TOK_NEW:    case TOK_NEW:
603      fprintf(f, "new ");      Stream_write_string(f, "new ");
604      instrument_function_call(node, f);      instrument_function_call(node, f);
605      break;      break;
606    case TOK_DELETE:    case TOK_DELETE:
607      fprintf(f, "delete ");      Stream_write_string(f, "delete ");
608      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
609      break;      break;
610    case TOK_DOT:    case TOK_DOT:
# Line 388  Line 617 
617      assert(ATOM_IS_STRING(node->pn_atom));      assert(ATOM_IS_STRING(node->pn_atom));
618      {      {
619        JSString * s = ATOM_TO_STRING(node->pn_atom);        JSString * s = ATOM_TO_STRING(node->pn_atom);
620        /* XXX - semantics changed in 1.7 */        bool must_quote;
621        if (! ATOM_KEYWORD(node->pn_atom) && js_IsIdentifier(s)) {        if (JSSTRING_LENGTH(s) == 0) {
622          fputc('.', f);          must_quote = true;
623          print_string_atom(node->pn_atom, f);        }
624          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        else {        else {
631          fputc('[', f);          must_quote = false;
632          }
633          if (must_quote) {
634            Stream_write_char(f, '[');
635          print_quoted_string_atom(node->pn_atom, f);          print_quoted_string_atom(node->pn_atom, f);
636          fputc(']', f);          Stream_write_char(f, ']');
637          }
638          else {
639            Stream_write_char(f, '.');
640            print_string_atom(node->pn_atom, f);
641        }        }
642      }      }
643      break;      break;
644    case TOK_LB:    case TOK_LB:
645      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
646      fputc('[', f);      Stream_write_char(f, '[');
647      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
648      fputc(']', f);      Stream_write_char(f, ']');
649      break;      break;
650    case TOK_LP:    case TOK_LP:
651      instrument_function_call(node, f);      instrument_function_call(node, f);
652      break;      break;
653    case TOK_RB:    case TOK_RB:
654      fputc('[', f);      Stream_write_char(f, '[');
655      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) {
656        if (p != node->pn_head) {        if (p != node->pn_head) {
657          fprintf(f, ", ");          Stream_write_string(f, ", ");
658        }        }
659        /* TOK_COMMA is a special case: a hole in the array */        /* TOK_COMMA is a special case: a hole in the array */
660        if (p->pn_type != TOK_COMMA) {        if (p->pn_type != TOK_COMMA) {
# Line 421  Line 662 
662        }        }
663      }      }
664      if (node->pn_extra == PNX_ENDCOMMA) {      if (node->pn_extra == PNX_ENDCOMMA) {
665        fputc(',', f);        Stream_write_char(f, ',');
666      }      }
667      fputc(']', f);      Stream_write_char(f, ']');
668      break;      break;
669    case TOK_RC:    case TOK_RC:
670      fputc('{', f);      Stream_write_char(f, '{');
671      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) {
672        assert(p->pn_type == TOK_COLON);        if (p->pn_type != TOK_COLON) {
673            fatal_source(file_id, p->pn_pos.begin.lineno, "unsupported node type (%d)", p->pn_type);
674          }
675        if (p != node->pn_head) {        if (p != node->pn_head) {
676          fprintf(f, ", ");          Stream_write_string(f, ", ");
677          }
678    
679          /* check whether this is a getter or setter */
680          switch (p->pn_op) {
681          case JSOP_GETTER:
682          case JSOP_SETTER:
683            if (p->pn_op == JSOP_GETTER) {
684              Stream_write_string(f, "get ");
685            }
686            else {
687              Stream_write_string(f, "set ");
688            }
689            instrument_expression(p->pn_left, f);
690            if (p->pn_right->pn_type != TOK_FUNCTION) {
691              fatal_source(file_id, p->pn_pos.begin.lineno, "expected function");
692            }
693            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        }        }
       instrument_expression(p->pn_left, f);  
       fprintf(f, ": ");  
       instrument_expression(p->pn_right, f);  
701      }      }
702      fputc('}', f);      Stream_write_char(f, '}');
703      break;      break;
704    case TOK_RP:    case TOK_RP:
705      fputc('(', f);      Stream_write_char(f, '(');
706      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
707      fputc(')', f);      Stream_write_char(f, ')');
708      break;      break;
709    case TOK_NAME:    case TOK_NAME:
710      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
# Line 449  Line 712 
712    case TOK_STRING:    case TOK_STRING:
713      print_quoted_string_atom(node->pn_atom, f);      print_quoted_string_atom(node->pn_atom, f);
714      break;      break;
715    case TOK_OBJECT:    case TOK_REGEXP:
716      switch (node->pn_op) {      assert(node->pn_op == JSOP_REGEXP);
717      case JSOP_OBJECT:      {
718        /* I assume this is JSOP_REGEXP */        JSObject * object = node->pn_pob->object;
719        abort();        jsval result;
720        break;        js_regexp_toString(context, object, &result);
721      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;  
722      }      }
723      break;      break;
724    case TOK_NUMBER:    case TOK_NUMBER:
# Line 477  Line 729 
729      To keep the output simple, special-case zero.      To keep the output simple, special-case zero.
730      */      */
731      if (node->pn_dval == 0.0) {      if (node->pn_dval == 0.0) {
732        fprintf(f, "0");        Stream_write_string(f, "0");
733      }      }
734      else {      else {
735        fprintf(f, "%.15g", node->pn_dval);        Stream_printf(f, "%.15g", node->pn_dval);
736      }      }
737      break;      break;
738    case TOK_PRIMARY:    case TOK_PRIMARY:
739      switch (node->pn_op) {      switch (node->pn_op) {
740      case JSOP_TRUE:      case JSOP_TRUE:
741        fprintf(f, "true");        Stream_write_string(f, "true");
742        break;        break;
743      case JSOP_FALSE:      case JSOP_FALSE:
744        fprintf(f, "false");        Stream_write_string(f, "false");
745        break;        break;
746      case JSOP_NULL:      case JSOP_NULL:
747        fprintf(f, "null");        Stream_write_string(f, "null");
748        break;        break;
749      case JSOP_THIS:      case JSOP_THIS:
750        fprintf(f, "this");        Stream_write_string(f, "this");
751        break;        break;
752      /* jsscan.h mentions `super' ??? */      /* jsscan.h mentions `super' ??? */
753      default:      default:
# Line 504  Line 756 
756      break;      break;
757    case TOK_INSTANCEOF:    case TOK_INSTANCEOF:
758      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
759      fprintf(f, " instanceof ");      Stream_write_string(f, " instanceof ");
760      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
761      break;      break;
762    case TOK_IN:    case TOK_IN:
763      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
764      fprintf(f, " in ");      Stream_write_string(f, " in ");
765      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
766      break;      break;
767    default:    case TOK_LEXICALSCOPE:
768      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      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  static void instrument_var_statement(JSParseNode * node, FILE * f, int indent) {      assert(node->pn_expr->pn_left->pn_type == TOK_LP);
773    assert(node->pn_arity == PN_LIST);      assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
774    fprintf(f, "%*s", indent, "");      instrument_declarations(node->pn_expr->pn_left, f);
775    fprintf(f, "var ");      Stream_write_string(f, ") ");
776    for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {      instrument_expression(node->pn_expr->pn_right, f);
777      assert(p->pn_type == TOK_NAME);      break;
778      assert(p->pn_arity == PN_NAME);    case TOK_YIELD:
779      if (p != node->pn_head) {      assert(node->pn_arity == PN_UNARY);
780        fprintf(f, ", ");      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      print_string_atom(p->pn_atom, f);      break;
786      if (p->pn_expr != NULL) {    case TOK_ARRAYCOMP:
787        fprintf(f, " = ");      assert(node->pn_arity == PN_LIST);
788        instrument_expression(p->pn_expr, f);      {
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          output_array_comprehension_or_generator_expression(block_node, f);
803          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      default:
817        fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
818    }    }
819  }  }
820    
821  static void output_statement(JSParseNode * node, FILE * f, int indent) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
822    switch (node->pn_type) {    switch (node->pn_type) {
823    case TOK_FUNCTION:    case TOK_FUNCTION:
824      instrument_function(node, f, indent);      instrument_function(node, f, indent, FUNCTION_NORMAL);
825      break;      break;
826    case TOK_LC:    case TOK_LC:
827      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
828  /*  /*
829      fprintf(f, "{\n");      Stream_write_string(f, "{\n");
830  */  */
831      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) {
832        instrument_statement(p, f, indent);        instrument_statement(p, f, indent, false);
833      }      }
834  /*  /*
835      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
836      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
837  */  */
838      break;      break;
839    case TOK_IF:    case TOK_IF:
840      {
841      assert(node->pn_arity == PN_TERNARY);      assert(node->pn_arity == PN_TERNARY);
842      fprintf(f, "%*s", indent, "");  
843      fprintf(f, "if (");      uint16_t line = node->pn_pos.begin.lineno;
844        if (! is_jscoverage_if) {
845          if (line > num_lines) {
846            fatal("file %s 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        Stream_printf(f, "%*s", indent, "");
854        Stream_write_string(f, "if (");
855      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
856      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
857      instrument_statement(node->pn_kid2, f, indent + 2);      if (is_jscoverage_if && node->pn_kid3) {
858      fprintf(f, "%*s", indent, "");        uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
859      fprintf(f, "}\n");        uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
860      if (node->pn_kid3) {        Stream_printf(f, "%*s", indent + 2, "");
861        fprintf(f, "%*s", indent, "");        Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
862        fprintf(f, "else {\n");      }
863        instrument_statement(node->pn_kid3, f, indent + 2);      instrument_statement(node->pn_kid2, f, indent + 2, false);
864        fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
865        fprintf(f, "}\n");      Stream_write_string(f, "}\n");
866    
867        if (node->pn_kid3 || is_jscoverage_if) {
868          Stream_printf(f, "%*s", indent, "");
869          Stream_write_string(f, "else {\n");
870    
871          if (is_jscoverage_if) {
872            uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
873            uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
874            Stream_printf(f, "%*s", indent + 2, "");
875            Stream_printf(f, "_$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          Stream_printf(f, "%*s", indent, "");
883          Stream_write_string(f, "}\n");
884      }      }
885    
886      break;      break;
887      }
888    case TOK_SWITCH:    case TOK_SWITCH:
889      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
890      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
891      fprintf(f, "switch (");      Stream_write_string(f, "switch (");
892      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
893      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
894      for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {      {
895        fprintf(f, "%*s", indent, "");        JSParseNode * list = node->pn_right;
896        switch (p->pn_type) {        if (list->pn_type == TOK_LEXICALSCOPE) {
897        case TOK_CASE:          list = list->pn_expr;
898          fprintf(f, "case ");        }
899          instrument_expression(p->pn_left, f);        for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
900          fprintf(f, ":\n");          Stream_printf(f, "%*s", indent, "");
901          break;          switch (p->pn_type) {
902        case TOK_DEFAULT:          case TOK_CASE:
903          fprintf(f, "default:\n");            Stream_write_string(f, "case ");
904          break;            instrument_expression(p->pn_left, f);
905        default:            Stream_write_string(f, ":\n");
906          abort();            break;
907          break;          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        }        }
       instrument_statement(p->pn_right, f, indent + 2);  
916      }      }
917      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
918      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
919      break;      break;
920    case TOK_CASE:    case TOK_CASE:
921    case TOK_DEFAULT:    case TOK_DEFAULT:
# Line 602  Line 923 
923      break;      break;
924    case TOK_WHILE:    case TOK_WHILE:
925      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
926      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
927      fprintf(f, "while (");      Stream_write_string(f, "while (");
928      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
929      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
930      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
931      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
932      break;      break;
933    case TOK_DO:    case TOK_DO:
934      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
935      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
936      fprintf(f, "do {\n");      Stream_write_string(f, "do {\n");
937      instrument_statement(node->pn_left, f, indent + 2);      instrument_statement(node->pn_left, f, indent + 2, false);
938      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
939      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
940      fprintf(f, "while (");      Stream_write_string(f, "while (");
941      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
942      fprintf(f, ");\n");      Stream_write_string(f, ");\n");
943      break;      break;
944    case TOK_FOR:    case TOK_FOR:
945      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
946      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     fprintf(f, "for (");  
947      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
948      case TOK_IN:      case TOK_IN:
949        /* for/in */        /* for/in */
950        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
951        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);  
952        break;        break;
953      case TOK_RESERVED:      case TOK_RESERVED:
954        /* for (;;) */        /* for (;;) */
955        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
956          Stream_write_string(f, "for (");
957        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
958          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);  
         }  
959        }        }
960        fprintf(f, ";");        Stream_write_string(f, ";");
961        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
962          fputc(' ', f);          Stream_write_char(f, ' ');
963          instrument_expression(node->pn_left->pn_kid2, f);          instrument_expression(node->pn_left->pn_kid2, f);
964        }        }
965        fprintf(f, ";");        Stream_write_string(f, ";");
966        if (node->pn_left->pn_kid3) {        if (node->pn_left->pn_kid3) {
967          fputc(' ', f);          Stream_write_char(f, ' ');
968          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
969        }        }
970          Stream_write_char(f, ')');
971        break;        break;
972      default:      default:
973        abort();        abort();
974        break;        break;
975      }      }
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_THROW:    case TOK_THROW:
981      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
982      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
983      fprintf(f, "throw ");      Stream_write_string(f, "throw ");
984      instrument_expression(node->pn_u.unary.kid, f);      instrument_expression(node->pn_u.unary.kid, f);
985      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
986      break;      break;
987    case TOK_TRY:    case TOK_TRY:
988      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
989      fprintf(f, "try {\n");      Stream_write_string(f, "try {\n");
990      instrument_statement(node->pn_kid1, f, indent + 2);      instrument_statement(node->pn_kid1, f, indent + 2, false);
991      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
992      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
993      {      if (node->pn_kid2) {
994        for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {        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          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
999          fprintf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
1000          fprintf(f, "catch (");          Stream_write_string(f, "catch (");
1001            /* this may not be a name - destructuring assignment */
1002            /*
1003          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
1004          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
1005          if (catch->pn_kid1->pn_expr) {          */
1006            fprintf(f, " if ");          instrument_expression(catch->pn_kid1, f);
1007            instrument_expression(catch->pn_kid1->pn_expr, f);          if (catch->pn_kid2) {
1008          }            Stream_write_string(f, " if ");
1009          fprintf(f, ") {\n");            instrument_expression(catch->pn_kid2, f);
1010          instrument_statement(catch->pn_kid3, f, indent + 2);          }
1011          fprintf(f, "%*s", indent, "");          Stream_write_string(f, ") {\n");
1012          fprintf(f, "}\n");          instrument_statement(catch->pn_kid3, f, indent + 2, false);
1013            Stream_printf(f, "%*s", indent, "");
1014            Stream_write_string(f, "}\n");
1015        }        }
1016      }      }
1017      if (node->pn_kid3) {      if (node->pn_kid3) {
1018        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1019        fprintf(f, "finally {\n");        Stream_write_string(f, "finally {\n");
1020        instrument_statement(node->pn_kid3, f, indent + 2);        instrument_statement(node->pn_kid3, f, indent + 2, false);
1021        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1022        fprintf(f, "}\n");        Stream_write_string(f, "}\n");
1023      }      }
1024      break;      break;
1025    case TOK_CATCH:    case TOK_CATCH:
# Line 723  Line 1028 
1028    case TOK_BREAK:    case TOK_BREAK:
1029    case TOK_CONTINUE:    case TOK_CONTINUE:
1030      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1031      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1032      fputs(node->pn_type == TOK_BREAK? "break": "continue", f);      Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1033      JSAtom * atom = node->pn_u.name.atom;      JSAtom * atom = node->pn_u.name.atom;
1034      if (atom != NULL) {      if (atom != NULL) {
1035        fputc(' ', f);        Stream_write_char(f, ' ');
1036        print_string_atom(node->pn_atom, f);        print_string_atom(node->pn_atom, f);
1037      }      }
1038      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1039      break;      break;
1040    case TOK_WITH:    case TOK_WITH:
1041      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
1042      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1043      fprintf(f, "with (");      Stream_write_string(f, "with (");
1044      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
1045      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
1046      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1047      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1048      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1049      break;      break;
1050    case TOK_VAR:    case TOK_VAR:
1051      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1052      fprintf(f, ";\n");      instrument_expression(node, f);
1053        Stream_write_string(f, ";\n");
1054      break;      break;
1055    case TOK_RETURN:    case TOK_RETURN:
1056      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1057      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1058      fprintf(f, "return");      Stream_write_string(f, "return");
1059      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1060        fprintf(f, " ");        Stream_write_char(f, ' ');
1061        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1062      }      }
1063      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1064      break;      break;
1065    case TOK_SEMI:    case TOK_SEMI:
1066      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1067      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1068      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1069        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1070      }      }
1071      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1072      break;      break;
1073    case TOK_COLON:    case TOK_COLON:
1074      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
# Line 770  Line 1076 
1076      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
1077      statement it's supposed to label ...      statement it's supposed to label ...
1078      */      */
1079      fprintf(f, "%*s", indent < 2? 0: indent - 2, "");      Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1080      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
1081      fprintf(f, ":\n");      Stream_write_string(f, ":\n");
1082      /*      /*
1083      ... use output_statement instead of instrument_statement.      ... use output_statement instead of instrument_statement.
1084      */      */
1085      output_statement(node->pn_expr, f, indent);      output_statement(node->pn_expr, f, indent, false);
1086        break;
1087      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          Stream_printf(f, "%*s", indent, "");
1129          instrument_expression(node, f);
1130          Stream_write_string(f, ";\n");
1131          break;
1132        default:
1133          abort();
1134          break;
1135        }
1136        break;
1137      case TOK_DEBUGGER:
1138        Stream_printf(f, "%*s", indent, "");
1139        Stream_write_string(f, "debugger;\n");
1140      break;      break;
1141    default:    default:
1142      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);
1143    }    }
1144  }  }
1145    
# Line 788  Line 1148 
1148  TOK_FUNCTION is handled as a statement and as an expression.  TOK_FUNCTION is handled as a statement and as an expression.
1149  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1150  */  */
1151  static void instrument_statement(JSParseNode * node, FILE * f, int indent) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1152    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1153      int line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1154        if (line > num_lines) {
1155          fatal("file %s contains more than 65,535 lines", file_id);
1156        }
1157    
1158      /* the root node has line number 0 */      /* the root node has line number 0 */
1159      if (line != 0) {      if (line != 0) {
1160        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1161        fprintf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);        Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1162        lines[line - 1] = 1;        lines[line - 1] = 1;
1163      }      }
1164    }    }
1165    output_statement(node, f, indent);    output_statement(node, f, indent, is_jscoverage_if);
1166  }  }
1167    
1168  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) {
1169    file_id = id;    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    /* scan the javascript */  static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1188    JSTokenStream * token_stream = js_NewFileTokenStream(context, NULL, input);    /* XXX - other Unicode space */
1189    if (token_stream == NULL) {    const jschar * end = characters + line_end;
1190      fatal("cannot create token stream from file: %s", file_id);    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    static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1203      fatal_source(file_id, report->lineno, message);
1204    }
1205    
1206    void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1207      file_id = id;
1208    
1209    /* parse the javascript */    /* parse the javascript */
1210    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);    JSParseContext parse_context;
1211      if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1212        fatal("cannot create token stream from file %s", file_id);
1213      }
1214      JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1215      JSParseNode * node = js_ParseScript(context, global, &parse_context);
1216    if (node == NULL) {    if (node == NULL) {
1217      fatal("parse error in file: %s", file_id);      js_ReportUncaughtException(context);
1218        fatal("parse error in file %s", file_id);
1219    }    }
1220    int num_lines = node->pn_pos.end.lineno;    JS_SetErrorReporter(context, old_error_reporter);
1221      num_lines = node->pn_pos.end.lineno;
1222    lines = xmalloc(num_lines);    lines = xmalloc(num_lines);
1223    for (int i = 0; i < num_lines; i++) {    for (unsigned int i = 0; i < num_lines; i++) {
1224      lines[i] = 0;      lines[i] = 0;
1225    }    }
1226    
1227      /* 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      }
1232    
1233      bool has_conditionals = false;
1234      struct IfDirective * if_directives = NULL;
1235      size_t line_number = 0;
1236      size_t i = 0;
1237      while (i < num_characters) {
1238        if (line_number == UINT16_MAX) {
1239          fatal("file %s contains more than 65,535 lines", file_id);
1240        }
1241        line_number++;
1242        size_t line_start = i;
1243        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        }
1258        size_t line_end = i;
1259        if (i < num_characters) {
1260          i++;
1261          if (c == '\r' && i < num_characters && characters[i] == '\n') {
1262            i++;
1263          }
1264        }
1265    
1266        if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1267          has_conditionals = true;
1268    
1269          if (characters_are_white_space(characters, line_start + 16, line_end)) {
1270            exclusive_directives[line_number - 1] = true;
1271          }
1272          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          }
1281        }
1282        else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1283          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        }
1290      }
1291    
1292    /*    /*
1293    Create a temporary file - we can't write directly to the output because we    An instrumented JavaScript file has 4 sections:
1294    need to know the line number info first.    1. initialization
1295      2. instrumented source code
1296      3. conditionals
1297      4. original source code
1298    */    */
   FILE * temporary = fopen(temporary_file_name, "w+");  
   if (temporary == NULL) {  
     fatal("cannot create temporary file for script: %s", file_id);  
   }  
1299    
1300    /* write instrumented javascript to the temporary */    Stream * instrumented = Stream_new(0);
1301    instrument_statement(node, temporary, 0);    instrument_statement(node, instrumented, 0, false);
1302      js_FinishParseContext(context, &parse_context);
1303    
1304    /* write line number info to the output */    /* write line number info to the output */
1305    fprintf(output, "/* automatically generated by JSCoverage - do not edit */\n");    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1306    fprintf(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");    if (jscoverage_mozilla) {
1307    fprintf(output, "var _$jscoverage = top._$jscoverage;\n");      Stream_write_string(output, "try {\n");
1308    fprintf(output, "if (! _$jscoverage['%s']) {\n", file_id);      Stream_write_string(output, "  Components.utils.import('resource://gre/modules/jscoverage.jsm');\n");
1309    fprintf(output, "  _$jscoverage['%s'] = [];\n", file_id);      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._$jscoverage;\n");
1319      }
1320      Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1321      Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);
1322    for (int i = 0; i < num_lines; i++) {    for (int i = 0; i < num_lines; i++) {
1323      if (lines[i]) {      if (lines[i]) {
1324        fprintf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);        Stream_printf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1325      }      }
1326    }    }
1327    fprintf(output, "}\n");    Stream_write_string(output, "}\n");
1328      free(lines);
1329    lines = NULL;    lines = NULL;
1330      free(exclusive_directives);
1331      exclusive_directives = NULL;
1332    
1333      /* conditionals */
1334      if (has_conditionals) {
1335        Stream_printf(output, "_$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    /* copy the temporary to the output */    /* conditionals */
1342    fseek(temporary, 0, SEEK_SET);    for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1343    copy_stream(temporary, output);      Stream_write_string(output, "if (!(");
1344        print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1345        Stream_write_string(output, ")) {\n");
1346        Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1347        Stream_write_string(output, "}\n");
1348      }
1349    
1350      /* free */
1351      while (if_directives != NULL) {
1352        struct IfDirective * if_directive = if_directives;
1353        if_directives = if_directives->next;
1354        free(if_directive);
1355      }
1356    
1357    fclose(temporary);    /* copy the original source to the output */
1358      Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1359      jscoverage_write_source(id, characters, num_characters, output);
1360      Stream_printf(output, ";\n");
1361    
1362      Stream_delete(instrumented);
1363    
1364    file_id = NULL;    file_id = NULL;
1365  }  }
1366    
1367  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) {
1368    instrument_js_stream(id, 0, input, output, temporary_file_name);    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            /* IE doesn't support this */
1396            /*
1397            case 0xb:
1398              Stream_write_string(output, "\\v");
1399              break;
1400            */
1401            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            i++;
1423            if (i >= highlighted_stream->length) {
1424              done = true;
1425            }
1426          }
1427          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            /* IE doesn't support this */
1456            /*
1457            case 0xb:
1458              Stream_write_string(output, "\\v");
1459              break;
1460            */
1461            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            i++;
1501            if (i >= num_characters) {
1502              done = true;
1503            }
1504          }
1505          Stream_write_char(output, '"');
1506        }
1507      }
1508      Stream_write_string(output, "]");
1509    }
1510    
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      copy_resource("jscoverage-ie.css", destination_directory);
1516      copy_resource("jscoverage-throbber.gif", destination_directory);
1517      copy_resource("jscoverage-highlight.css", destination_directory);
1518    }
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        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        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      int result = 0;
1588    
1589      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      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      }
1606      JSParseNode * root = js_ParseScript(context, global, &parse_context);
1607      free(parenthesized_json);
1608      if (root == NULL) {
1609        result = -1;
1610        goto done;
1611      }
1612    
1613      /* root node must be TOK_LC */
1614      if (root->pn_type != TOK_LC) {
1615        result = -1;
1616        goto done;
1617      }
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        result = -1;
1623        goto done;
1624      }
1625      JSParseNode * parenthesized = semi->pn_kid;
1626    
1627      /* this must be a parenthesized expression */
1628      if (parenthesized->pn_type != TOK_RP) {
1629        result = -1;
1630        goto done;
1631      }
1632      JSParseNode * object = parenthesized->pn_kid;
1633    
1634      /* this must be an object literal */
1635      if (object->pn_type != TOK_RC) {
1636        result = -1;
1637        goto done;
1638      }
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          result = -1;
1644          goto done;
1645        }
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          result = -1;
1651          goto done;
1652        }
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          result = -1;
1659          goto done;
1660        }
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            result = -1;
1672            goto done;
1673          }
1674          for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1675            if (element->pn_type != TOK_COLON) {
1676              result = -1;
1677              goto done;
1678            }
1679            JSParseNode * left = element->pn_left;
1680            if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1681              result = -1;
1682              goto done;
1683            }
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                result = -1;
1689                goto done;
1690              }
1691            }
1692            else if (strcmp(s, "source") == 0) {
1693              source = element->pn_right;
1694              if (source->pn_type != TOK_RB) {
1695                result = -1;
1696                goto done;
1697              }
1698            }
1699            else {
1700              result = -1;
1701              goto done;
1702            }
1703          }
1704        }
1705        else {
1706          result = -1;
1707          goto done;
1708        }
1709    
1710        if (array == NULL) {
1711          result = -1;
1712          goto done;
1713        }
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          file_coverage->num_coverage_lines = array->pn_count;
1723          file_coverage->coverage_lines = xnew(int, array->pn_count);
1724          file_coverage->source_lines = NULL;
1725    
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              file_coverage->coverage_lines[i] = (int) element->pn_dval;
1731            }
1732            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1733              file_coverage->coverage_lines[i] = -1;
1734            }
1735            else {
1736              result = -1;
1737              goto done;
1738            }
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          if (file_coverage->num_coverage_lines != array->pn_count) {
1753            result = -2;
1754            goto done;
1755          }
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              if (file_coverage->coverage_lines[i] == -1) {
1762                result = -2;
1763                goto done;
1764              }
1765              file_coverage->coverage_lines[i] += (int) element->pn_dval;
1766            }
1767            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1768              if (file_coverage->coverage_lines[i] != -1) {
1769                result = -2;
1770                goto done;
1771              }
1772            }
1773            else {
1774              result = -1;
1775              goto done;
1776            }
1777          }
1778          assert(i == array->pn_count);
1779        }
1780    
1781        /* 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              result = -1;
1789              goto done;
1790            }
1791            file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1792          }
1793          assert(i == source->pn_count);
1794        }
1795      }
1796    
1797    done:
1798      js_FinishParseContext(context, &parse_context);
1799      return result;
1800  }  }

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