/[jscoverage]/trunk/instrument-js.c
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revision 101 by siliconforks, Sat May 24 18:11:30 2008 UTC revision 349 by siliconforks, Fri Oct 24 16:17:19 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 <jsexn.h>
32  #include <jsfun.h>  #include <jsfun.h>
33  #include <jsinterp.h>  #include <jsinterp.h>
34    #include <jsiter.h>
35  #include <jsparse.h>  #include <jsparse.h>
36  #include <jsregexp.h>  #include <jsregexp.h>
37  #include <jsscope.h>  #include <jsscope.h>
38  #include <jsstr.h>  #include <jsstr.h>
39    
40    #include "encoding.h"
41    #include "global.h"
42    #include "highlight.h"
43    #include "resource-manager.h"
44  #include "util.h"  #include "util.h"
45    
46    struct IfDirective {
47      const jschar * condition_start;
48      const jschar * condition_end;
49      uint16_t start_line;
50      uint16_t end_line;
51      struct IfDirective * next;
52    };
53    
54    static bool * exclusive_directives = NULL;
55    
56  static JSRuntime * runtime = NULL;  static JSRuntime * runtime = NULL;
57  static JSContext * context = NULL;  static JSContext * context = NULL;
58  static JSObject * global = NULL;  static JSObject * global = NULL;
59    static JSVersion js_version = JSVERSION_ECMA_3;
60    
61  /*  /*
62  JSParseNode objects store line numbers starting from 1.  JSParseNode objects store line numbers starting from 1.
# Line 44  Line 64 
64  */  */
65  static const char * file_id = NULL;  static const char * file_id = NULL;
66  static char * lines = NULL;  static char * lines = NULL;
67    static uint16_t num_lines = 0;
68    
69    void jscoverage_set_js_version(const char * version) {
70      js_version = atoi(version);
71    }
72    
73  void jscoverage_init(void) {  void jscoverage_init(void) {
74    runtime = JS_NewRuntime(8L * 1024L * 1024L);    runtime = JS_NewRuntime(8L * 1024L * 1024L);
# Line 56  Line 81 
81      fatal("cannot create context");      fatal("cannot create context");
82    }    }
83    
84      JS_SetVersion(context, js_version);
85    
86    global = JS_NewObject(context, NULL, NULL, NULL);    global = JS_NewObject(context, NULL, NULL, NULL);
87    if (global == NULL) {    if (global == NULL) {
88      fatal("cannot create global object");      fatal("cannot create global object");
# Line 71  Line 98 
98    JS_DestroyRuntime(runtime);    JS_DestroyRuntime(runtime);
99  }  }
100    
101    static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
102      for (size_t i = 0; i < num_characters; i++) {
103        jschar c = characters[i];
104        /*
105        XXX does not handle no-break space, other unicode "space separator"
106        */
107        switch (c) {
108        case 0x9:
109        case 0xB:
110        case 0xC:
111          Stream_write_char(f, c);
112          break;
113        default:
114          if (32 <= c && c <= 126) {
115            Stream_write_char(f, c);
116          }
117          else {
118            Stream_printf(f, "\\u%04x", c);
119          }
120          break;
121        }
122      }
123    }
124    
125  static void print_string(JSString * s, Stream * f) {  static void print_string(JSString * s, Stream * f) {
126    for (size_t i = 0; i < s->length; i++) {    size_t length = JSSTRING_LENGTH(s);
127      char c = s->chars[i];    jschar * characters = JSSTRING_CHARS(s);
128      Stream_write_char(f, c);    for (size_t i = 0; i < length; i++) {
129        jschar c = characters[i];
130        if (32 <= c && c <= 126) {
131          switch (c) {
132          case '"':
133            Stream_write_string(f, "\\\"");
134            break;
135    /*
136          case '\'':
137            Stream_write_string(f, "\\'");
138            break;
139    */
140          case '\\':
141            Stream_write_string(f, "\\\\");
142            break;
143          default:
144            Stream_write_char(f, c);
145            break;
146          }
147        }
148        else {
149          switch (c) {
150          case 0x8:
151            Stream_write_string(f, "\\b");
152            break;
153          case 0x9:
154            Stream_write_string(f, "\\t");
155            break;
156          case 0xa:
157            Stream_write_string(f, "\\n");
158            break;
159          /* IE doesn't support this */
160          /*
161          case 0xb:
162            Stream_write_string(f, "\\v");
163            break;
164          */
165          case 0xc:
166            Stream_write_string(f, "\\f");
167            break;
168          case 0xd:
169            Stream_write_string(f, "\\r");
170            break;
171          default:
172            Stream_printf(f, "\\u%04x", c);
173            break;
174          }
175        }
176    }    }
177  }  }
178    
# Line 84  Line 182 
182    print_string(s, f);    print_string(s, f);
183  }  }
184    
185  static void print_string_jsval(jsval value, Stream * f) {  static void print_regex(jsval value, Stream * f) {
186    assert(JSVAL_IS_STRING(value));    assert(JSVAL_IS_STRING(value));
187    JSString * s = JSVAL_TO_STRING(value);    JSString * s = JSVAL_TO_STRING(value);
188    print_string(s, f);    size_t length = JSSTRING_LENGTH(s);
189      jschar * characters = JSSTRING_CHARS(s);
190      for (size_t i = 0; i < length; i++) {
191        jschar c = characters[i];
192        if (32 <= c && c <= 126) {
193          Stream_write_char(f, c);
194        }
195        else {
196          Stream_printf(f, "\\u%04x", c);
197        }
198      }
199  }  }
200    
201  static void print_quoted_string_atom(JSAtom * atom, Stream * f) {  static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
202    assert(ATOM_IS_STRING(atom));    assert(ATOM_IS_STRING(atom));
203    JSString * s = ATOM_TO_STRING(atom);    JSString * s = ATOM_TO_STRING(atom);
204    JSString * quoted = js_QuoteString(context, s, '"');    Stream_write_char(f, '"');
205    print_string(quoted, f);    print_string(s, f);
206      Stream_write_char(f, '"');
207  }  }
208    
209  static const char * get_op(uint8 op) {  static const char * get_op(uint8 op) {
210    switch(op) {    switch(op) {
211      case JSOP_OR:
212        return "||";
213      case JSOP_AND:
214        return "&&";
215    case JSOP_BITOR:    case JSOP_BITOR:
216      return "|";      return "|";
217    case JSOP_BITXOR:    case JSOP_BITXOR:
# Line 109  Line 222 
222      return "==";      return "==";
223    case JSOP_NE:    case JSOP_NE:
224      return "!=";      return "!=";
225    case JSOP_NEW_EQ:    case JSOP_STRICTEQ:
226      return "===";      return "===";
227    case JSOP_NEW_NE:    case JSOP_STRICTNE:
228      return "!==";      return "!==";
229    case JSOP_LT:    case JSOP_LT:
230      return "<";      return "<";
# Line 143  Line 256 
256  }  }
257    
258  static void instrument_expression(JSParseNode * node, Stream * f);  static void instrument_expression(JSParseNode * node, Stream * f);
259  static void instrument_statement(JSParseNode * node, Stream * f, int indent);  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
260    static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
261    
262  static void instrument_function(JSParseNode * node, Stream * f, int indent) {  enum FunctionType {
263      assert(node->pn_arity == PN_FUNC);    FUNCTION_NORMAL,
264      assert(ATOM_IS_OBJECT(node->pn_funAtom));    FUNCTION_GETTER_OR_SETTER
265      JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);  };
266      assert(JS_ObjectIsFunction(context, object));  
267      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);  static void output_for_in(JSParseNode * node, Stream * f) {
268      assert(function);    assert(node->pn_type == TOK_FOR);
269      assert(object == function->object);    assert(node->pn_arity == PN_BINARY);
270      Stream_printf(f, "%*s", indent, "");    Stream_write_string(f, "for ");
271      if (node->pn_iflags & JSITER_FOREACH) {
272        Stream_write_string(f, "each ");
273      }
274      Stream_write_char(f, '(');
275      instrument_expression(node->pn_left, f);
276      Stream_write_char(f, ')');
277    }
278    
279    static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
280      assert(node->pn_type == TOK_FUNCTION);
281      assert(node->pn_arity == PN_FUNC);
282      JSObject * object = node->pn_funpob->object;
283      assert(JS_ObjectIsFunction(context, object));
284      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
285      assert(function);
286      assert(object == &function->object);
287      Stream_printf(f, "%*s", indent, "");
288      if (type == FUNCTION_NORMAL) {
289      Stream_write_string(f, "function");      Stream_write_string(f, "function");
290      }
291    
292      /* function name */    /* function name */
293      if (function->atom) {    if (function->atom) {
294        Stream_write_char(f, ' ');      Stream_write_char(f, ' ');
295        print_string_atom(function->atom, f);      print_string_atom(function->atom, f);
296      }    }
297    
298      /* function parameters */    /*
299      Stream_write_string(f, "(");    function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
300      JSAtom ** params = xmalloc(function->nargs * sizeof(JSAtom *));    js_DecompileFunction in jsopcode.cpp
301      for (int i = 0; i < function->nargs; i++) {    */
302        /* initialize to NULL for sanity check */    Stream_write_string(f, "(");
303        params[i] = NULL;    JSArenaPool pool;
304      }    JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
305      JSScope * scope = OBJ_SCOPE(object);    jsuword * local_names = NULL;
306      for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {    if (JS_GET_LOCAL_NAME_COUNT(function)) {
307        if (scope_property->getter != js_GetArgument) {      local_names = js_GetLocalNameArray(context, function, &pool);
308          continue;      if (local_names == NULL) {
309        }        fatal("out of memory");
       assert(scope_property->flags & SPROP_HAS_SHORTID);  
       assert((uint16) scope_property->shortid < function->nargs);  
       assert(JSID_IS_ATOM(scope_property->id));  
       params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);  
310      }      }
311      for (int i = 0; i < function->nargs; i++) {    }
312        assert(params[i] != NULL);    for (int i = 0; i < function->nargs; i++) {
313        if (i > 0) {      if (i > 0) {
314          Stream_write_string(f, ", ");        Stream_write_string(f, ", ");
       }  
       if (ATOM_IS_STRING(params[i])) {  
         print_string_atom(params[i], f);  
       }  
315      }      }
316      Stream_write_string(f, ") {\n");      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
317      free(params);      print_string_atom(param, f);
318      }
319      JS_FinishArenaPool(&pool);
320      Stream_write_string(f, ") {\n");
321    
322      /* function body */    /* function body */
323      instrument_statement(node->pn_body, f, indent + 2);    if (function->flags & JSFUN_EXPR_CLOSURE) {
324        /* expression closure */
325        output_statement(node->pn_body, f, indent + 2, false);
326      }
327      else {
328        instrument_statement(node->pn_body, f, indent + 2, false);
329      }
330    
331      Stream_write_string(f, "}\n");    Stream_write_string(f, "}\n");
332  }  }
333    
334  static void instrument_function_call(JSParseNode * node, Stream * f) {  static void instrument_function_call(JSParseNode * node, Stream * f) {
335    instrument_expression(node->pn_head, f);    if (node->pn_head->pn_type == TOK_FUNCTION) {
336    Stream_write_char(f, '(');      /* it's a generator expression */
337    for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {      JSParseNode * function_node = node->pn_head;
338      if (p != node->pn_head->pn_next) {      JSParseNode * lexical_scope_node = function_node->pn_body;
339        Stream_write_string(f, ", ");      assert(lexical_scope_node->pn_type == TOK_LEXICALSCOPE);
340        assert(lexical_scope_node->pn_arity == PN_NAME);
341        JSParseNode * for_node = lexical_scope_node->pn_body;
342        assert(for_node->pn_type == TOK_FOR);
343        assert(for_node->pn_arity == PN_BINARY);
344        JSParseNode * if_node = NULL;
345        JSParseNode * semi_node;
346        switch (for_node->pn_right->pn_type) {
347        case TOK_SEMI:
348          semi_node = for_node->pn_right;
349          break;
350        case TOK_IF:
351          if_node = for_node->pn_right;
352          assert(if_node->pn_arity == PN_TERNARY);
353          semi_node = if_node->pn_kid2;
354          assert(semi_node->pn_type == TOK_SEMI);
355          break;
356        default:
357          abort();
358          break;
359        }
360        assert(semi_node->pn_arity == PN_UNARY);
361        JSParseNode * yield_node = semi_node->pn_kid;
362        assert(yield_node->pn_type == TOK_YIELD);
363        Stream_write_char(f, '(');
364        instrument_expression(yield_node->pn_kid, f);
365        Stream_write_char(f, ' ');
366        output_for_in(for_node, f);
367        if (if_node) {
368          Stream_write_string(f, " if (");
369          instrument_expression(if_node->pn_kid1, f);
370          Stream_write_char(f, ')');
371        }
372        Stream_write_char(f, ')');
373      }
374      else {
375        instrument_expression(node->pn_head, f);
376        Stream_write_char(f, '(');
377        for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {
378          if (p != node->pn_head->pn_next) {
379            Stream_write_string(f, ", ");
380          }
381          instrument_expression(p, f);
382        }
383        Stream_write_char(f, ')');
384      }
385    }
386    
387    static void instrument_declarations(JSParseNode * list, Stream * f) {
388      assert(list->pn_arity == PN_LIST);
389      for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
390        switch (p->pn_type) {
391        case TOK_NAME:
392          assert(p->pn_arity == PN_NAME);
393          if (p != list->pn_head) {
394            Stream_write_string(f, ", ");
395          }
396          print_string_atom(p->pn_atom, f);
397          if (p->pn_expr != NULL) {
398            Stream_write_string(f, " = ");
399            instrument_expression(p->pn_expr, f);
400          }
401          break;
402        case TOK_ASSIGN:
403        case TOK_RB:
404        case TOK_RC:
405          /* destructuring */
406          instrument_expression(p, f);
407          break;
408        default:
409          abort();
410          break;
411      }      }
     instrument_expression(p, f);  
412    }    }
   Stream_write_char(f, ')');  
413  }  }
414    
415  /*  /*
# Line 225  Line 428 
428  static void instrument_expression(JSParseNode * node, Stream * f) {  static void instrument_expression(JSParseNode * node, Stream * f) {
429    switch (node->pn_type) {    switch (node->pn_type) {
430    case TOK_FUNCTION:    case TOK_FUNCTION:
431      instrument_function(node, f, 0);      instrument_function(node, f, 0, FUNCTION_NORMAL);
432      break;      break;
433    case TOK_COMMA:    case TOK_COMMA:
434      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) {
# Line 267  Line 470 
470      instrument_expression(node->pn_kid3, f);      instrument_expression(node->pn_kid3, f);
471      break;      break;
472    case TOK_OR:    case TOK_OR:
     instrument_expression(node->pn_left, f);  
     Stream_write_string(f, " || ");  
     instrument_expression(node->pn_right, f);  
     break;  
473    case TOK_AND:    case TOK_AND:
     instrument_expression(node->pn_left, f);  
     Stream_write_string(f, " && ");  
     instrument_expression(node->pn_right, f);  
     break;  
474    case TOK_BITOR:    case TOK_BITOR:
475    case TOK_BITXOR:    case TOK_BITXOR:
476    case TOK_BITAND:    case TOK_BITAND:
# Line 388  Line 583 
583      assert(ATOM_IS_STRING(node->pn_atom));      assert(ATOM_IS_STRING(node->pn_atom));
584      {      {
585        JSString * s = ATOM_TO_STRING(node->pn_atom);        JSString * s = ATOM_TO_STRING(node->pn_atom);
586        /* XXX - semantics changed in 1.7 */        bool must_quote;
587        if (! ATOM_KEYWORD(node->pn_atom) && js_IsIdentifier(s)) {        if (JSSTRING_LENGTH(s) == 0) {
588          Stream_write_char(f, '.');          must_quote = true;
589          print_string_atom(node->pn_atom, f);        }
590          else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
591            must_quote = true;
592          }
593          else if (! js_IsIdentifier(s)) {
594            must_quote = true;
595        }        }
596        else {        else {
597            must_quote = false;
598          }
599          if (must_quote) {
600          Stream_write_char(f, '[');          Stream_write_char(f, '[');
601          print_quoted_string_atom(node->pn_atom, f);          print_quoted_string_atom(node->pn_atom, f);
602          Stream_write_char(f, ']');          Stream_write_char(f, ']');
603        }        }
604          else {
605            Stream_write_char(f, '.');
606            print_string_atom(node->pn_atom, f);
607          }
608      }      }
609      break;      break;
610    case TOK_LB:    case TOK_LB:
# Line 432  Line 639 
639        if (p != node->pn_head) {        if (p != node->pn_head) {
640          Stream_write_string(f, ", ");          Stream_write_string(f, ", ");
641        }        }
642        instrument_expression(p->pn_left, f);  
643        Stream_write_string(f, ": ");        /* check whether this is a getter or setter */
644        instrument_expression(p->pn_right, f);        switch (p->pn_op) {
645          case JSOP_GETTER:
646          case JSOP_SETTER:
647            if (p->pn_op == JSOP_GETTER) {
648              Stream_write_string(f, "get ");
649            }
650            else {
651              Stream_write_string(f, "set ");
652            }
653            instrument_expression(p->pn_left, f);
654            if (p->pn_right->pn_type != TOK_FUNCTION) {
655              fatal("parse error: expected function");
656            }
657            instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
658            break;
659          default:
660            instrument_expression(p->pn_left, f);
661            Stream_write_string(f, ": ");
662            instrument_expression(p->pn_right, f);
663            break;
664          }
665      }      }
666      Stream_write_char(f, '}');      Stream_write_char(f, '}');
667      break;      break;
# Line 449  Line 676 
676    case TOK_STRING:    case TOK_STRING:
677      print_quoted_string_atom(node->pn_atom, f);      print_quoted_string_atom(node->pn_atom, f);
678      break;      break;
679    case TOK_OBJECT:    case TOK_REGEXP:
680      switch (node->pn_op) {      assert(node->pn_op == JSOP_REGEXP);
681      case JSOP_OBJECT:      {
682        /* I assume this is JSOP_REGEXP */        JSObject * object = node->pn_pob->object;
683        abort();        jsval result;
684        break;        js_regexp_toString(context, object, &result);
685      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;  
686      }      }
687      break;      break;
688    case TOK_NUMBER:    case TOK_NUMBER:
# Line 512  Line 728 
728      Stream_write_string(f, " in ");      Stream_write_string(f, " in ");
729      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
730      break;      break;
731      case TOK_LEXICALSCOPE:
732        assert(node->pn_arity == PN_NAME);
733        assert(node->pn_expr->pn_type == TOK_LET);
734        assert(node->pn_expr->pn_arity == PN_BINARY);
735        Stream_write_string(f, "let(");
736        assert(node->pn_expr->pn_left->pn_type == TOK_LP);
737        assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
738        instrument_declarations(node->pn_expr->pn_left, f);
739        Stream_write_string(f, ") ");
740        instrument_expression(node->pn_expr->pn_right, f);
741        break;
742      case TOK_YIELD:
743        assert(node->pn_arity == PN_UNARY);
744        Stream_write_string(f, "yield ");
745        instrument_expression(node->pn_kid, f);
746        break;
747      case TOK_ARRAYCOMP:
748        assert(node->pn_arity == PN_LIST);
749        {
750          JSParseNode * block_node;
751          switch (node->pn_count) {
752          case 1:
753            block_node = node->pn_head;
754            break;
755          case 2:
756            block_node = node->pn_head->pn_next;
757            break;
758          default:
759            abort();
760            break;
761          }
762          assert(block_node->pn_type == TOK_LEXICALSCOPE);
763          assert(block_node->pn_arity == PN_NAME);
764          JSParseNode * for_node = block_node->pn_expr;
765          assert(for_node->pn_type == TOK_FOR);
766          assert(for_node->pn_arity == PN_BINARY);
767          JSParseNode * if_node = NULL;
768          JSParseNode * push_node;
769          switch (for_node->pn_right->pn_type) {
770          case TOK_ARRAYPUSH:
771            push_node = for_node->pn_right;
772            assert(push_node->pn_arity == PN_UNARY);
773            break;
774          case TOK_IF:
775            if_node = for_node->pn_right;
776            assert(if_node->pn_arity == PN_TERNARY);
777            push_node = if_node->pn_kid2;
778            break;
779          default:
780            abort();
781            break;
782          }
783          Stream_write_char(f, '[');
784          instrument_expression(push_node->pn_kid, f);
785          Stream_write_char(f, ' ');
786          output_for_in(for_node, f);
787          if (if_node) {
788            Stream_write_string(f, " if (");
789            instrument_expression(if_node->pn_kid1, f);
790            Stream_write_char(f, ')');
791          }
792          Stream_write_char(f, ']');
793        }
794        break;
795      case TOK_VAR:
796        assert(node->pn_arity == PN_LIST);
797        Stream_write_string(f, "var ");
798        instrument_declarations(node, f);
799        break;
800      case TOK_LET:
801        assert(node->pn_arity == PN_LIST);
802        Stream_write_string(f, "let ");
803        instrument_declarations(node, f);
804        break;
805    default:    default:
806      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
807    }    }
808  }  }
809    
810  static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
   assert(node->pn_arity == PN_LIST);  
   Stream_printf(f, "%*s", indent, "");  
   Stream_write_string(f, "var ");  
   for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {  
     assert(p->pn_type == TOK_NAME);  
     assert(p->pn_arity == PN_NAME);  
     if (p != node->pn_head) {  
       Stream_write_string(f, ", ");  
     }  
     print_string_atom(p->pn_atom, f);  
     if (p->pn_expr != NULL) {  
       Stream_write_string(f, " = ");  
       instrument_expression(p->pn_expr, f);  
     }  
   }  
 }  
   
 static void output_statement(JSParseNode * node, Stream * f, int indent) {  
811    switch (node->pn_type) {    switch (node->pn_type) {
812    case TOK_FUNCTION:    case TOK_FUNCTION:
813      instrument_function(node, f, indent);      instrument_function(node, f, indent, FUNCTION_NORMAL);
814      break;      break;
815    case TOK_LC:    case TOK_LC:
816      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
# Line 546  Line 818 
818      Stream_write_string(f, "{\n");      Stream_write_string(f, "{\n");
819  */  */
820      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) {
821        instrument_statement(p, f, indent);        instrument_statement(p, f, indent, false);
822      }      }
823  /*  /*
824      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
# Line 554  Line 826 
826  */  */
827      break;      break;
828    case TOK_IF:    case TOK_IF:
829      {
830      assert(node->pn_arity == PN_TERNARY);      assert(node->pn_arity == PN_TERNARY);
831    
832        uint16_t line = node->pn_pos.begin.lineno;
833        if (! is_jscoverage_if) {
834          if (line > num_lines) {
835            fatal("%s: script contains more than 65,535 lines", file_id);
836          }
837          if (line >= 2 && exclusive_directives[line - 2]) {
838            is_jscoverage_if = true;
839          }
840        }
841    
842      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
843      Stream_write_string(f, "if (");      Stream_write_string(f, "if (");
844      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
845      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
846      instrument_statement(node->pn_kid2, f, indent + 2);      if (is_jscoverage_if && node->pn_kid3) {
847          uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
848          uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
849          Stream_printf(f, "%*s", indent + 2, "");
850          Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
851        }
852        instrument_statement(node->pn_kid2, f, indent + 2, false);
853      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
854      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
855      if (node->pn_kid3) {  
856        if (node->pn_kid3 || is_jscoverage_if) {
857        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
858        Stream_write_string(f, "else {\n");        Stream_write_string(f, "else {\n");
859        instrument_statement(node->pn_kid3, f, indent + 2);  
860          if (is_jscoverage_if) {
861            uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
862            uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
863            Stream_printf(f, "%*s", indent + 2, "");
864            Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
865          }
866    
867          if (node->pn_kid3) {
868            instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
869          }
870    
871        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
872        Stream_write_string(f, "}\n");        Stream_write_string(f, "}\n");
873      }      }
874    
875      break;      break;
876      }
877    case TOK_SWITCH:    case TOK_SWITCH:
878      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
879      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
# Line 591  Line 895 
895          abort();          abort();
896          break;          break;
897        }        }
898        instrument_statement(p->pn_right, f, indent + 2);        instrument_statement(p->pn_right, f, indent + 2, false);
899      }      }
900      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
901      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
# Line 606  Line 910 
910      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
911      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
912      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
913      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
914      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
915      break;      break;
916    case TOK_DO:    case TOK_DO:
917      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
918      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
919      Stream_write_string(f, "do {\n");      Stream_write_string(f, "do {\n");
920      instrument_statement(node->pn_left, f, indent + 2);      instrument_statement(node->pn_left, f, indent + 2, false);
921      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
922      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
923      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
# Line 623  Line 927 
927    case TOK_FOR:    case TOK_FOR:
928      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
929      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     Stream_write_string(f, "for (");  
930      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
931      case TOK_IN:      case TOK_IN:
932        /* for/in */        /* for/in */
933        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
934        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;  
 */  
       }  
       Stream_write_string(f, " in ");  
       instrument_expression(node->pn_left->pn_right, f);  
935        break;        break;
936      case TOK_RESERVED:      case TOK_RESERVED:
937        /* for (;;) */        /* for (;;) */
938        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
939          Stream_write_string(f, "for (");
940        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
941          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);  
         }  
942        }        }
943        Stream_write_string(f, ";");        Stream_write_string(f, ";");
944        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
# Line 670  Line 950 
950          Stream_write_char(f, ' ');          Stream_write_char(f, ' ');
951          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
952        }        }
953          Stream_write_char(f, ')');
954        break;        break;
955      default:      default:
956        abort();        abort();
957        break;        break;
958      }      }
959      Stream_write_string(f, ") {\n");      Stream_write_string(f, " {\n");
960      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
961      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
962      break;      break;
963    case TOK_THROW:    case TOK_THROW:
# Line 689  Line 970 
970    case TOK_TRY:    case TOK_TRY:
971      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
972      Stream_write_string(f, "try {\n");      Stream_write_string(f, "try {\n");
973      instrument_statement(node->pn_kid1, f, indent + 2);      instrument_statement(node->pn_kid1, f, indent + 2, false);
974      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
975      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
976      {      if (node->pn_kid2) {
977        for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {        assert(node->pn_kid2->pn_type == TOK_RESERVED);
978          for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
979            assert(scope->pn_type == TOK_LEXICALSCOPE);
980            JSParseNode * catch = scope->pn_expr;
981          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
982          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
983          Stream_write_string(f, "catch (");          Stream_write_string(f, "catch (");
984            /* this may not be a name - destructuring assignment */
985            /*
986          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
987          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
988          if (catch->pn_kid1->pn_expr) {          */
989            instrument_expression(catch->pn_kid1, f);
990            if (catch->pn_kid2) {
991            Stream_write_string(f, " if ");            Stream_write_string(f, " if ");
992            instrument_expression(catch->pn_kid1->pn_expr, f);            instrument_expression(catch->pn_kid2, f);
993          }          }
994          Stream_write_string(f, ") {\n");          Stream_write_string(f, ") {\n");
995          instrument_statement(catch->pn_kid3, f, indent + 2);          instrument_statement(catch->pn_kid3, f, indent + 2, false);
996          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
997          Stream_write_string(f, "}\n");          Stream_write_string(f, "}\n");
998        }        }
# Line 712  Line 1000 
1000      if (node->pn_kid3) {      if (node->pn_kid3) {
1001        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1002        Stream_write_string(f, "finally {\n");        Stream_write_string(f, "finally {\n");
1003        instrument_statement(node->pn_kid3, f, indent + 2);        instrument_statement(node->pn_kid3, f, indent + 2, false);
1004        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1005        Stream_write_string(f, "}\n");        Stream_write_string(f, "}\n");
1006      }      }
# Line 738  Line 1026 
1026      Stream_write_string(f, "with (");      Stream_write_string(f, "with (");
1027      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
1028      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
1029      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1030      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1031      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
1032      break;      break;
1033    case TOK_VAR:    case TOK_VAR:
1034      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1035        instrument_expression(node, f);
1036      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1037      break;      break;
1038    case TOK_RETURN:    case TOK_RETURN:
# Line 776  Line 1065 
1065      /*      /*
1066      ... use output_statement instead of instrument_statement.      ... use output_statement instead of instrument_statement.
1067      */      */
1068      output_statement(node->pn_expr, f, indent);      output_statement(node->pn_expr, f, indent, false);
1069        break;
1070      case TOK_LEXICALSCOPE:
1071        /* let statement */
1072        assert(node->pn_arity == PN_NAME);
1073        switch (node->pn_expr->pn_type) {
1074        case TOK_LET:
1075          /* let statement */
1076          assert(node->pn_expr->pn_arity == PN_BINARY);
1077          instrument_statement(node->pn_expr, f, indent, false);
1078          break;
1079        case TOK_LC:
1080          /* block */
1081          Stream_printf(f, "%*s", indent, "");
1082          Stream_write_string(f, "{\n");
1083          instrument_statement(node->pn_expr, f, indent + 2, false);
1084          Stream_printf(f, "%*s", indent, "");
1085          Stream_write_string(f, "}\n");
1086          break;
1087        case TOK_FOR:
1088          instrument_statement(node->pn_expr, f, indent, false);
1089          break;
1090        default:
1091          abort();
1092          break;
1093        }
1094        break;
1095      case TOK_LET:
1096        switch (node->pn_arity) {
1097        case PN_BINARY:
1098          /* let statement */
1099          Stream_printf(f, "%*s", indent, "");
1100          Stream_write_string(f, "let (");
1101          assert(node->pn_left->pn_type == TOK_LP);
1102          assert(node->pn_left->pn_arity == PN_LIST);
1103          instrument_declarations(node->pn_left, f);
1104          Stream_write_string(f, ") {\n");
1105          instrument_statement(node->pn_right, f, indent + 2, false);
1106          Stream_printf(f, "%*s", indent, "");
1107          Stream_write_string(f, "}\n");
1108          break;
1109        case PN_LIST:
1110          /* let definition */
1111          Stream_printf(f, "%*s", indent, "");
1112          instrument_expression(node, f);
1113          Stream_write_string(f, ";\n");
1114          break;
1115        default:
1116          abort();
1117          break;
1118        }
1119        break;
1120      case TOK_DEBUGGER:
1121        Stream_printf(f, "%*s", indent, "");
1122        Stream_write_string(f, "debugger;\n");
1123      break;      break;
1124    default:    default:
1125      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);
# Line 788  Line 1131 
1131  TOK_FUNCTION is handled as a statement and as an expression.  TOK_FUNCTION is handled as a statement and as an expression.
1132  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1133  */  */
1134  static void instrument_statement(JSParseNode * node, Stream * f, int indent) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1135    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1136      int line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1137        if (line > num_lines) {
1138          fatal("%s: script contains more than 65,535 lines", file_id);
1139        }
1140    
1141      /* the root node has line number 0 */      /* the root node has line number 0 */
1142      if (line != 0) {      if (line != 0) {
1143        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
# Line 798  Line 1145 
1145        lines[line - 1] = 1;        lines[line - 1] = 1;
1146      }      }
1147    }    }
1148    output_statement(node, f, indent);    output_statement(node, f, indent, is_jscoverage_if);
1149  }  }
1150    
1151  void jscoverage_instrument_js(const char * id, Stream * input, Stream * output) {  static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1152    file_id = id;    const jschar * characters_end = characters + line_end;
1153      const jschar * cp = characters + line_start;
1154    /* scan the javascript */    const char * bp = prefix;
1155    size_t input_length = input->length;    for (;;) {
1156    jschar * base = js_InflateString(context, input->data, &input_length);      if (*bp == '\0') {
1157    if (base == NULL) {        return true;
1158      fatal("out of memory");      }
1159        else if (cp == characters_end) {
1160          return false;
1161        }
1162        else if (*cp != *bp) {
1163          return false;
1164        }
1165        bp++;
1166        cp++;
1167    }    }
1168    JSTokenStream * token_stream = js_NewTokenStream(context, base, input_length, NULL, 1, NULL);  }
1169    if (token_stream == NULL) {  
1170      fatal("cannot create token stream from file: %s", file_id);  static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1171      /* XXX - other Unicode space */
1172      const jschar * end = characters + line_end;
1173      for (const jschar * p = characters + line_start; p < end; p++) {
1174        jschar c = *p;
1175        if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1176          continue;
1177        }
1178        else {
1179          return false;
1180        }
1181    }    }
1182      return true;
1183    }
1184    
1185    static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1186      fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
1187    }
1188    
1189    void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1190      file_id = id;
1191    
1192    /* parse the javascript */    /* parse the javascript */
1193    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);    JSParseContext parse_context;
1194      if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1195        fatal("cannot create token stream from file: %s", file_id);
1196      }
1197      JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1198      JSParseNode * node = js_ParseScript(context, global, &parse_context);
1199    if (node == NULL) {    if (node == NULL) {
1200        js_ReportUncaughtException(context);
1201      fatal("parse error in file: %s", file_id);      fatal("parse error in file: %s", file_id);
1202    }    }
1203    int num_lines = node->pn_pos.end.lineno;    JS_SetErrorReporter(context, old_error_reporter);
1204      num_lines = node->pn_pos.end.lineno;
1205    lines = xmalloc(num_lines);    lines = xmalloc(num_lines);
1206    for (int i = 0; i < num_lines; i++) {    for (unsigned int i = 0; i < num_lines; i++) {
1207      lines[i] = 0;      lines[i] = 0;
1208    }    }
1209    
1210      /* search code for conditionals */
1211      exclusive_directives = xnew(bool, num_lines);
1212      for (unsigned int i = 0; i < num_lines; i++) {
1213        exclusive_directives[i] = false;
1214      }
1215    
1216      bool has_conditionals = false;
1217      struct IfDirective * if_directives = NULL;
1218      size_t line_number = 0;
1219      size_t i = 0;
1220      while (i < num_characters) {
1221        if (line_number == UINT16_MAX) {
1222          fatal("%s: script has more than 65,535 lines", file_id);
1223        }
1224        line_number++;
1225        size_t line_start = i;
1226        jschar c;
1227        bool done = false;
1228        while (! done && i < num_characters) {
1229          c = characters[i];
1230          switch (c) {
1231          case '\r':
1232          case '\n':
1233          case 0x2028:
1234          case 0x2029:
1235            done = true;
1236            break;
1237          default:
1238            i++;
1239          }
1240        }
1241        size_t line_end = i;
1242        if (i < num_characters) {
1243          i++;
1244          if (c == '\r' && i < num_characters && characters[i] == '\n') {
1245            i++;
1246          }
1247        }
1248    
1249        if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1250          has_conditionals = true;
1251    
1252          if (characters_are_white_space(characters, line_start + 16, line_end)) {
1253            exclusive_directives[line_number - 1] = true;
1254          }
1255          else {
1256            struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1257            if_directive->condition_start = characters + line_start + 16;
1258            if_directive->condition_end = characters + line_end;
1259            if_directive->start_line = line_number;
1260            if_directive->end_line = 0;
1261            if_directive->next = if_directives;
1262            if_directives = if_directive;
1263          }
1264        }
1265        else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1266          for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1267            if (p->end_line == 0) {
1268              p->end_line = line_number;
1269              break;
1270            }
1271          }
1272        }
1273      }
1274    
1275    /*    /*
1276    An instrumented JavaScript file has 3 sections:    An instrumented JavaScript file has 4 sections:
1277    1. initialization    1. initialization
1278    2. instrumented source code    2. instrumented source code
1279    3. original source code (TODO)    3. conditionals
1280      4. original source code
1281    */    */
1282    
1283    Stream * instrumented = Stream_new(0);    Stream * instrumented = Stream_new(0);
1284    instrument_statement(node, instrumented, 0);    instrument_statement(node, instrumented, 0, false);
1285      js_FinishParseContext(context, &parse_context);
1286    
1287    /* write line number info to the output */    /* write line number info to the output */
1288    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
# Line 850  Line 1298 
1298    Stream_write_string(output, "}\n");    Stream_write_string(output, "}\n");
1299    free(lines);    free(lines);
1300    lines = NULL;    lines = NULL;
1301      free(exclusive_directives);
1302      exclusive_directives = NULL;
1303    
1304      /* conditionals */
1305      if (has_conditionals) {
1306        Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1307      }
1308    
1309    /* copy the instrumented source code to the output */    /* copy the instrumented source code to the output */
1310    Stream_write(output, instrumented->data, instrumented->length);    Stream_write(output, instrumented->data, instrumented->length);
1311    Stream_write_char(output, '\n');  
1312      /* conditionals */
1313      for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1314        Stream_write_string(output, "if (!(");
1315        print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1316        Stream_write_string(output, ")) {\n");
1317        Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1318        Stream_write_string(output, "}\n");
1319      }
1320    
1321      /* free */
1322      while (if_directives != NULL) {
1323        struct IfDirective * if_directive = if_directives;
1324        if_directives = if_directives->next;
1325        free(if_directive);
1326      }
1327    
1328    /* copy the original source to the output */    /* copy the original source to the output */
1329    size_t i = 0;    Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1330    while (i < input_length) {    jscoverage_write_source(id, characters, num_characters, output);
1331      Stream_write_string(output, "// ");    Stream_printf(output, ";\n");
     size_t line_start = i;  
     while (i < input_length && base[i] != '\r' && base[i] != '\n') {  
       i++;  
     }  
1332    
1333      size_t line_end = i;    Stream_delete(instrumented);
1334      if (i < input_length) {  
1335        if (base[i] == '\r') {    file_id = NULL;
1336          line_end = i;  }
1337    
1338    void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1339      Stream_write_string(output, "[");
1340      if (jscoverage_highlight) {
1341        Stream * highlighted_stream = Stream_new(num_characters);
1342        jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1343        size_t i = 0;
1344        while (i < highlighted_stream->length) {
1345          if (i > 0) {
1346            Stream_write_char(output, ',');
1347          }
1348    
1349          Stream_write_char(output, '"');
1350          bool done = false;
1351          while (! done) {
1352            char c = highlighted_stream->data[i];
1353            switch (c) {
1354            case 0x8:
1355              /* backspace */
1356              Stream_write_string(output, "\\b");
1357              break;
1358            case 0x9:
1359              /* horizontal tab */
1360              Stream_write_string(output, "\\t");
1361              break;
1362            case 0xa:
1363              /* line feed (new line) */
1364              done = true;
1365              break;
1366            /* IE doesn't support this */
1367            /*
1368            case 0xb:
1369              Stream_write_string(output, "\\v");
1370              break;
1371            */
1372            case 0xc:
1373              /* form feed */
1374              Stream_write_string(output, "\\f");
1375              break;
1376            case 0xd:
1377              /* carriage return */
1378              done = true;
1379              if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1380                i++;
1381              }
1382              break;
1383            case '"':
1384              Stream_write_string(output, "\\\"");
1385              break;
1386            case '\\':
1387              Stream_write_string(output, "\\\\");
1388              break;
1389            default:
1390              Stream_write_char(output, c);
1391              break;
1392            }
1393          i++;          i++;
1394          if (i < input_length && base[i] == '\n') {          if (i >= highlighted_stream->length) {
1395            i++;            done = true;
1396          }          }
1397        }        }
1398        else if (base[i] == '\n') {        Stream_write_char(output, '"');
1399          line_end = i;      }
1400        Stream_delete(highlighted_stream);
1401      }
1402      else {
1403        size_t i = 0;
1404        while (i < num_characters) {
1405          if (i > 0) {
1406            Stream_write_char(output, ',');
1407          }
1408    
1409          Stream_write_char(output, '"');
1410          bool done = false;
1411          while (! done) {
1412            jschar c = characters[i];
1413            switch (c) {
1414            case 0x8:
1415              /* backspace */
1416              Stream_write_string(output, "\\b");
1417              break;
1418            case 0x9:
1419              /* horizontal tab */
1420              Stream_write_string(output, "\\t");
1421              break;
1422            case 0xa:
1423              /* line feed (new line) */
1424              done = true;
1425              break;
1426            /* IE doesn't support this */
1427            /*
1428            case 0xb:
1429              Stream_write_string(output, "\\v");
1430              break;
1431            */
1432            case 0xc:
1433              /* form feed */
1434              Stream_write_string(output, "\\f");
1435              break;
1436            case 0xd:
1437              /* carriage return */
1438              done = true;
1439              if (i + 1 < num_characters && characters[i + 1] == '\n') {
1440                i++;
1441              }
1442              break;
1443            case '"':
1444              Stream_write_string(output, "\\\"");
1445              break;
1446            case '\\':
1447              Stream_write_string(output, "\\\\");
1448              break;
1449            case '&':
1450              Stream_write_string(output, "&amp;");
1451              break;
1452            case '<':
1453              Stream_write_string(output, "&lt;");
1454              break;
1455            case '>':
1456              Stream_write_string(output, "&gt;");
1457              break;
1458            case 0x2028:
1459            case 0x2029:
1460              done = true;
1461              break;
1462            default:
1463              if (32 <= c && c <= 126) {
1464                Stream_write_char(output, c);
1465              }
1466              else {
1467                Stream_printf(output, "&#%d;", c);
1468              }
1469              break;
1470            }
1471          i++;          i++;
1472            if (i >= num_characters) {
1473              done = true;
1474            }
1475        }        }
1476        else {        Stream_write_char(output, '"');
1477          abort();      }
1478      }
1479      Stream_write_string(output, "]");
1480    }
1481    
1482    void jscoverage_copy_resources(const char * destination_directory) {
1483      copy_resource("jscoverage.html", destination_directory);
1484      copy_resource("jscoverage.css", destination_directory);
1485      copy_resource("jscoverage.js", destination_directory);
1486      copy_resource("jscoverage-ie.css", destination_directory);
1487      copy_resource("jscoverage-throbber.gif", destination_directory);
1488      copy_resource("jscoverage-highlight.css", destination_directory);
1489    }
1490    
1491    /*
1492    coverage reports
1493    */
1494    
1495    struct FileCoverageList {
1496      FileCoverage * file_coverage;
1497      struct FileCoverageList * next;
1498    };
1499    
1500    struct Coverage {
1501      JSHashTable * coverage_table;
1502      struct FileCoverageList * coverage_list;
1503    };
1504    
1505    static int compare_strings(const void * p1, const void * p2) {
1506      return strcmp(p1, p2) == 0;
1507    }
1508    
1509    Coverage * Coverage_new(void) {
1510      Coverage * result = xmalloc(sizeof(Coverage));
1511      result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1512      if (result->coverage_table == NULL) {
1513        fatal("cannot create hash table");
1514      }
1515      result->coverage_list = NULL;
1516      return result;
1517    }
1518    
1519    void Coverage_delete(Coverage * coverage) {
1520      JS_HashTableDestroy(coverage->coverage_table);
1521      struct FileCoverageList * p = coverage->coverage_list;
1522      while (p != NULL) {
1523        free(p->file_coverage->coverage_lines);
1524        if (p->file_coverage->source_lines != NULL) {
1525          for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1526            free(p->file_coverage->source_lines[i]);
1527        }        }
1528          free(p->file_coverage->source_lines);
1529      }      }
1530        free(p->file_coverage->id);
1531        free(p->file_coverage);
1532        struct FileCoverageList * q = p;
1533        p = p->next;
1534        free(q);
1535      }
1536      free(coverage);
1537    }
1538    
1539    struct EnumeratorArg {
1540      CoverageForeachFunction f;
1541      void * p;
1542    };
1543    
1544    static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1545      struct EnumeratorArg * enumerator_arg = arg;
1546      enumerator_arg->f(entry->value, i, enumerator_arg->p);
1547      return 0;
1548    }
1549    
1550      char * line = js_DeflateString(context, base + line_start, line_end - line_start);  void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1551      Stream_write_string(output, line);    struct EnumeratorArg enumerator_arg;
1552      Stream_write_char(output, '\n');    enumerator_arg.f = f;
1553      JS_free(context, line);    enumerator_arg.p = p;
1554      JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1555    }
1556    
1557    int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1558      int result = 0;
1559    
1560      jschar * base = js_InflateString(context, (char *) json, &length);
1561      if (base == NULL) {
1562        fatal("out of memory");
1563    }    }
1564    
1565    Stream_delete(instrumented);    jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1566      parenthesized_json[0] = '(';
1567      memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1568      parenthesized_json[length + 1] = ')';
1569    
1570    JS_free(context, base);    JS_free(context, base);
1571    
1572    file_id = NULL;    JSParseContext parse_context;
1573      if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1574        free(parenthesized_json);
1575        return -1;
1576      }
1577      JSParseNode * root = js_ParseScript(context, global, &parse_context);
1578      free(parenthesized_json);
1579      if (root == NULL) {
1580        result = -1;
1581        goto done;
1582      }
1583    
1584      /* root node must be TOK_LC */
1585      if (root->pn_type != TOK_LC) {
1586        result = -1;
1587        goto done;
1588      }
1589      JSParseNode * semi = root->pn_u.list.head;
1590    
1591      /* the list must be TOK_SEMI and it must contain only one element */
1592      if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1593        result = -1;
1594        goto done;
1595      }
1596      JSParseNode * parenthesized = semi->pn_kid;
1597    
1598      /* this must be a parenthesized expression */
1599      if (parenthesized->pn_type != TOK_RP) {
1600        result = -1;
1601        goto done;
1602      }
1603      JSParseNode * object = parenthesized->pn_kid;
1604    
1605      /* this must be an object literal */
1606      if (object->pn_type != TOK_RC) {
1607        result = -1;
1608        goto done;
1609      }
1610    
1611      for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1612        /* every element of this list must be TOK_COLON */
1613        if (p->pn_type != TOK_COLON) {
1614          result = -1;
1615          goto done;
1616        }
1617    
1618        /* the key must be a string representing the file */
1619        JSParseNode * key = p->pn_left;
1620        if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1621          result = -1;
1622          goto done;
1623        }
1624        char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1625    
1626        /* the value must be an object literal OR an array */
1627        JSParseNode * value = p->pn_right;
1628        if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1629          result = -1;
1630          goto done;
1631        }
1632    
1633        JSParseNode * array = NULL;
1634        JSParseNode * source = NULL;
1635        if (value->pn_type == TOK_RB) {
1636          /* an array */
1637          array = value;
1638        }
1639        else if (value->pn_type == TOK_RC) {
1640          /* an object literal */
1641          if (value->pn_count != 2) {
1642            result = -1;
1643            goto done;
1644          }
1645          for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1646            if (element->pn_type != TOK_COLON) {
1647              result = -1;
1648              goto done;
1649            }
1650            JSParseNode * left = element->pn_left;
1651            if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1652              result = -1;
1653              goto done;
1654            }
1655            const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1656            if (strcmp(s, "coverage") == 0) {
1657              array = element->pn_right;
1658              if (array->pn_type != TOK_RB) {
1659                result = -1;
1660                goto done;
1661              }
1662            }
1663            else if (strcmp(s, "source") == 0) {
1664              source = element->pn_right;
1665              if (source->pn_type != TOK_RB) {
1666                result = -1;
1667                goto done;
1668              }
1669            }
1670            else {
1671              result = -1;
1672              goto done;
1673            }
1674          }
1675        }
1676        else {
1677          result = -1;
1678          goto done;
1679        }
1680    
1681        if (array == NULL) {
1682          result = -1;
1683          goto done;
1684        }
1685    
1686        /* look up the file in the coverage table */
1687        FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1688        if (file_coverage == NULL) {
1689          /* not there: create a new one */
1690          char * id = xstrdup(id_bytes);
1691          file_coverage = xmalloc(sizeof(FileCoverage));
1692          file_coverage->id = id;
1693          file_coverage->num_coverage_lines = array->pn_count;
1694          file_coverage->coverage_lines = xnew(int, array->pn_count);
1695          file_coverage->source_lines = NULL;
1696    
1697          /* set coverage for all lines */
1698          uint32 i = 0;
1699          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1700            if (element->pn_type == TOK_NUMBER) {
1701              file_coverage->coverage_lines[i] = (int) element->pn_dval;
1702            }
1703            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1704              file_coverage->coverage_lines[i] = -1;
1705            }
1706            else {
1707              result = -1;
1708              goto done;
1709            }
1710          }
1711          assert(i == array->pn_count);
1712    
1713          /* add to the hash table */
1714          JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1715          struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1716          coverage_list->file_coverage = file_coverage;
1717          coverage_list->next = coverage->coverage_list;
1718          coverage->coverage_list = coverage_list;
1719        }
1720        else {
1721          /* sanity check */
1722          assert(strcmp(file_coverage->id, id_bytes) == 0);
1723          if (file_coverage->num_coverage_lines != array->pn_count) {
1724            result = -2;
1725            goto done;
1726          }
1727    
1728          /* merge the coverage */
1729          uint32 i = 0;
1730          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1731            if (element->pn_type == TOK_NUMBER) {
1732              if (file_coverage->coverage_lines[i] == -1) {
1733                result = -2;
1734                goto done;
1735              }
1736              file_coverage->coverage_lines[i] += (int) element->pn_dval;
1737            }
1738            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1739              if (file_coverage->coverage_lines[i] != -1) {
1740                result = -2;
1741                goto done;
1742              }
1743            }
1744            else {
1745              result = -1;
1746              goto done;
1747            }
1748          }
1749          assert(i == array->pn_count);
1750        }
1751    
1752        /* if this JSON file has source, use it */
1753        if (file_coverage->source_lines == NULL && source != NULL) {
1754          file_coverage->num_source_lines = source->pn_count;
1755          file_coverage->source_lines = xnew(char *, source->pn_count);
1756          uint32 i = 0;
1757          for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1758            if (element->pn_type != TOK_STRING) {
1759              result = -1;
1760              goto done;
1761            }
1762            file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1763          }
1764          assert(i == source->pn_count);
1765        }
1766      }
1767    
1768    done:
1769      js_FinishParseContext(context, &parse_context);
1770      return result;
1771  }  }

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