/[jscoverage]/trunk/instrument-js.c
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Diff of /trunk/instrument-js.c

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revision 336 by siliconforks, Thu Oct 23 20:08:29 2008 UTC revision 350 by siliconforks, Fri Oct 24 16:17:39 2008 UTC
# Line 31  Line 31 
31  #include <jsexn.h>  #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>
# Line 55  Line 56 
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 64  Line 66 
66  static char * lines = NULL;  static char * lines = NULL;
67  static uint16_t num_lines = 0;  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);
75    if (runtime == NULL) {    if (runtime == NULL) {
# Line 75  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 249  Line 257 
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, bool is_jscoverage_if);  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  enum FunctionType {  enum FunctionType {
263    FUNCTION_NORMAL,    FUNCTION_NORMAL,
264    FUNCTION_GETTER_OR_SETTER    FUNCTION_GETTER_OR_SETTER
265  };  };
266    
267    static void output_for_in(JSParseNode * node, Stream * f) {
268      assert(node->pn_type == TOK_FOR);
269      assert(node->pn_arity == PN_BINARY);
270      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) {  static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
280    assert(node->pn_type == TOK_FUNCTION);    assert(node->pn_type == TOK_FUNCTION);
281    assert(node->pn_arity == PN_FUNC);    assert(node->pn_arity == PN_FUNC);
# Line 299  Line 320 
320    Stream_write_string(f, ") {\n");    Stream_write_string(f, ") {\n");
321    
322    /* function body */    /* function body */
323    instrument_statement(node->pn_body, f, indent + 2, false);    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 487  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        bool is_keyword = (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF);        bool must_quote;
587        if (! is_keyword && 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 620  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    
 static void instrument_var_statement(JSParseNode * node, Stream * f, int indent) {  
   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);  
     }  
   }  
 }  
   
810  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
811    switch (node->pn_type) {    switch (node->pn_type) {
812    case TOK_FUNCTION:    case TOK_FUNCTION:
# Line 716  Line 880 
880      Stream_write_string(f, "switch (");      Stream_write_string(f, "switch (");
881      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
882      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
883      for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {      {
884        Stream_printf(f, "%*s", indent, "");        JSParseNode * list = node->pn_right;
885        switch (p->pn_type) {        if (list->pn_type == TOK_LEXICALSCOPE) {
886        case TOK_CASE:          list = list->pn_expr;
887          Stream_write_string(f, "case ");        }
888          instrument_expression(p->pn_left, f);        for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
889          Stream_write_string(f, ":\n");          Stream_printf(f, "%*s", indent, "");
890          break;          switch (p->pn_type) {
891        case TOK_DEFAULT:          case TOK_CASE:
892          Stream_write_string(f, "default:\n");            Stream_write_string(f, "case ");
893          break;            instrument_expression(p->pn_left, f);
894        default:            Stream_write_string(f, ":\n");
895          abort();            break;
896          break;          case TOK_DEFAULT:
897              Stream_write_string(f, "default:\n");
898              break;
899            default:
900              abort();
901              break;
902            }
903            instrument_statement(p->pn_right, f, indent + 2, false);
904        }        }
       instrument_statement(p->pn_right, f, indent + 2, false);  
905      }      }
906      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
907      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
# Line 763  Line 933 
933    case TOK_FOR:    case TOK_FOR:
934      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
935      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     Stream_write_string(f, "for (");  
936      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
937      case TOK_IN:      case TOK_IN:
938        /* for/in */        /* for/in */
939        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
940        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);  
941        break;        break;
942      case TOK_RESERVED:      case TOK_RESERVED:
943        /* for (;;) */        /* for (;;) */
944        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
945          Stream_write_string(f, "for (");
946        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
947          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);  
         }  
948        }        }
949        Stream_write_string(f, ";");        Stream_write_string(f, ";");
950        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
# Line 810  Line 956 
956          Stream_write_char(f, ' ');          Stream_write_char(f, ' ');
957          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
958        }        }
959          Stream_write_char(f, ')');
960        break;        break;
961      default:      default:
962        abort();        abort();
963        break;        break;
964      }      }
965      Stream_write_string(f, ") {\n");      Stream_write_string(f, " {\n");
966      instrument_statement(node->pn_right, f, indent + 2, false);      instrument_statement(node->pn_right, f, indent + 2, false);
967      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
968      break;      break;
# Line 840  Line 987 
987          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
988          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
989          Stream_write_string(f, "catch (");          Stream_write_string(f, "catch (");
990            /* this may not be a name - destructuring assignment */
991            /*
992          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
993          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
994            */
995            instrument_expression(catch->pn_kid1, f);
996          if (catch->pn_kid2) {          if (catch->pn_kid2) {
997            Stream_write_string(f, " if ");            Stream_write_string(f, " if ");
998            instrument_expression(catch->pn_kid2, f);            instrument_expression(catch->pn_kid2, f);
# Line 886  Line 1037 
1037      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
1038      break;      break;
1039    case TOK_VAR:    case TOK_VAR:
1040      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1041        instrument_expression(node, f);
1042      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1043      break;      break;
1044    case TOK_RETURN:    case TOK_RETURN:
# Line 921  Line 1073 
1073      */      */
1074      output_statement(node->pn_expr, f, indent, false);      output_statement(node->pn_expr, f, indent, false);
1075      break;      break;
1076      case TOK_LEXICALSCOPE:
1077        /* let statement */
1078        assert(node->pn_arity == PN_NAME);
1079        switch (node->pn_expr->pn_type) {
1080        case TOK_LET:
1081          /* let statement */
1082          assert(node->pn_expr->pn_arity == PN_BINARY);
1083          instrument_statement(node->pn_expr, f, indent, false);
1084          break;
1085        case TOK_LC:
1086          /* block */
1087          Stream_printf(f, "%*s", indent, "");
1088          Stream_write_string(f, "{\n");
1089          instrument_statement(node->pn_expr, f, indent + 2, false);
1090          Stream_printf(f, "%*s", indent, "");
1091          Stream_write_string(f, "}\n");
1092          break;
1093        case TOK_FOR:
1094          instrument_statement(node->pn_expr, f, indent, false);
1095          break;
1096        default:
1097          abort();
1098          break;
1099        }
1100        break;
1101      case TOK_LET:
1102        switch (node->pn_arity) {
1103        case PN_BINARY:
1104          /* let statement */
1105          Stream_printf(f, "%*s", indent, "");
1106          Stream_write_string(f, "let (");
1107          assert(node->pn_left->pn_type == TOK_LP);
1108          assert(node->pn_left->pn_arity == PN_LIST);
1109          instrument_declarations(node->pn_left, f);
1110          Stream_write_string(f, ") {\n");
1111          instrument_statement(node->pn_right, f, indent + 2, false);
1112          Stream_printf(f, "%*s", indent, "");
1113          Stream_write_string(f, "}\n");
1114          break;
1115        case PN_LIST:
1116          /* let definition */
1117          Stream_printf(f, "%*s", indent, "");
1118          instrument_expression(node, f);
1119          Stream_write_string(f, ";\n");
1120          break;
1121        default:
1122          abort();
1123          break;
1124        }
1125        break;
1126      case TOK_DEBUGGER:
1127        Stream_printf(f, "%*s", indent, "");
1128        Stream_write_string(f, "debugger;\n");
1129        break;
1130    default:    default:
1131      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);
1132    }    }
# Line 932  Line 1138 
1138  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1139  */  */
1140  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1141    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1142      uint16_t line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1143      if (line > num_lines) {      if (line > num_lines) {
1144        fatal("%s: script contains more than 65,535 lines", file_id);        fatal("%s: script contains more than 65,535 lines", file_id);
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