/[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 348 by siliconforks, Fri Oct 24 16:17:00 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 620  Line 716 
716      Stream_write_string(f, " in ");      Stream_write_string(f, " in ");
717      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
718      break;      break;
719      case TOK_LEXICALSCOPE:
720        assert(node->pn_arity == PN_NAME);
721        assert(node->pn_expr->pn_type == TOK_LET);
722        assert(node->pn_expr->pn_arity == PN_BINARY);
723        Stream_write_string(f, "let(");
724        assert(node->pn_expr->pn_left->pn_type == TOK_LP);
725        assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
726        instrument_declarations(node->pn_expr->pn_left, f);
727        Stream_write_string(f, ") ");
728        instrument_expression(node->pn_expr->pn_right, f);
729        break;
730      case TOK_YIELD:
731        assert(node->pn_arity == PN_UNARY);
732        Stream_write_string(f, "yield ");
733        instrument_expression(node->pn_kid, f);
734        break;
735      case TOK_ARRAYCOMP:
736        assert(node->pn_arity == PN_LIST);
737        {
738          JSParseNode * block_node;
739          switch (node->pn_count) {
740          case 1:
741            block_node = node->pn_head;
742            break;
743          case 2:
744            block_node = node->pn_head->pn_next;
745            break;
746          default:
747            abort();
748            break;
749          }
750          assert(block_node->pn_type == TOK_LEXICALSCOPE);
751          assert(block_node->pn_arity == PN_NAME);
752          JSParseNode * for_node = block_node->pn_expr;
753          assert(for_node->pn_type == TOK_FOR);
754          assert(for_node->pn_arity == PN_BINARY);
755          JSParseNode * if_node = NULL;
756          JSParseNode * push_node;
757          switch (for_node->pn_right->pn_type) {
758          case TOK_ARRAYPUSH:
759            push_node = for_node->pn_right;
760            assert(push_node->pn_arity == PN_UNARY);
761            break;
762          case TOK_IF:
763            if_node = for_node->pn_right;
764            assert(if_node->pn_arity == PN_TERNARY);
765            push_node = if_node->pn_kid2;
766            break;
767          default:
768            abort();
769            break;
770          }
771          Stream_write_char(f, '[');
772          instrument_expression(push_node->pn_kid, f);
773          Stream_write_char(f, ' ');
774          output_for_in(for_node, f);
775          if (if_node) {
776            Stream_write_string(f, " if (");
777            instrument_expression(if_node->pn_kid1, f);
778            Stream_write_char(f, ')');
779          }
780          Stream_write_char(f, ']');
781        }
782        break;
783      case TOK_VAR:
784        assert(node->pn_arity == PN_LIST);
785        Stream_write_string(f, "var ");
786        instrument_declarations(node, f);
787        break;
788      case TOK_LET:
789        assert(node->pn_arity == PN_LIST);
790        Stream_write_string(f, "let ");
791        instrument_declarations(node, f);
792        break;
793    default:    default:
794      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);
795    }    }
796  }  }
797    
 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);  
     }  
   }  
 }  
   
798  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) {
799    switch (node->pn_type) {    switch (node->pn_type) {
800    case TOK_FUNCTION:    case TOK_FUNCTION:
# Line 763  Line 915 
915    case TOK_FOR:    case TOK_FOR:
916      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
917      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     Stream_write_string(f, "for (");  
918      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
919      case TOK_IN:      case TOK_IN:
920        /* for/in */        /* for/in */
921        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
922        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);  
923        break;        break;
924      case TOK_RESERVED:      case TOK_RESERVED:
925        /* for (;;) */        /* for (;;) */
926        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
927          Stream_write_string(f, "for (");
928        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
929          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);  
         }  
930        }        }
931        Stream_write_string(f, ";");        Stream_write_string(f, ";");
932        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
# Line 810  Line 938 
938          Stream_write_char(f, ' ');          Stream_write_char(f, ' ');
939          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
940        }        }
941          Stream_write_char(f, ')');
942        break;        break;
943      default:      default:
944        abort();        abort();
945        break;        break;
946      }      }
947      Stream_write_string(f, ") {\n");      Stream_write_string(f, " {\n");
948      instrument_statement(node->pn_right, f, indent + 2, false);      instrument_statement(node->pn_right, f, indent + 2, false);
949      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
950      break;      break;
# Line 840  Line 969 
969          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
970          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
971          Stream_write_string(f, "catch (");          Stream_write_string(f, "catch (");
972            /* this may not be a name - destructuring assignment */
973            /*
974          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
975          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
976            */
977            instrument_expression(catch->pn_kid1, f);
978          if (catch->pn_kid2) {          if (catch->pn_kid2) {
979            Stream_write_string(f, " if ");            Stream_write_string(f, " if ");
980            instrument_expression(catch->pn_kid2, f);            instrument_expression(catch->pn_kid2, f);
# Line 886  Line 1019 
1019      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
1020      break;      break;
1021    case TOK_VAR:    case TOK_VAR:
1022      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1023        instrument_expression(node, f);
1024      Stream_write_string(f, ";\n");      Stream_write_string(f, ";\n");
1025      break;      break;
1026    case TOK_RETURN:    case TOK_RETURN:
# Line 921  Line 1055 
1055      */      */
1056      output_statement(node->pn_expr, f, indent, false);      output_statement(node->pn_expr, f, indent, false);
1057      break;      break;
1058      case TOK_LEXICALSCOPE:
1059        /* let statement */
1060        assert(node->pn_arity == PN_NAME);
1061        switch (node->pn_expr->pn_type) {
1062        case TOK_LET:
1063          /* let statement */
1064          assert(node->pn_expr->pn_arity == PN_BINARY);
1065          instrument_statement(node->pn_expr, f, indent, false);
1066          break;
1067        case TOK_LC:
1068          /* block */
1069          Stream_printf(f, "%*s", indent, "");
1070          Stream_write_string(f, "{\n");
1071          instrument_statement(node->pn_expr, f, indent + 2, false);
1072          Stream_printf(f, "%*s", indent, "");
1073          Stream_write_string(f, "}\n");
1074          break;
1075        case TOK_FOR:
1076          instrument_statement(node->pn_expr, f, indent, false);
1077          break;
1078        default:
1079          abort();
1080          break;
1081        }
1082        break;
1083      case TOK_LET:
1084        switch (node->pn_arity) {
1085        case PN_BINARY:
1086          /* let statement */
1087          Stream_printf(f, "%*s", indent, "");
1088          Stream_write_string(f, "let (");
1089          assert(node->pn_left->pn_type == TOK_LP);
1090          assert(node->pn_left->pn_arity == PN_LIST);
1091          instrument_declarations(node->pn_left, f);
1092          Stream_write_string(f, ") {\n");
1093          instrument_statement(node->pn_right, f, indent + 2, false);
1094          Stream_printf(f, "%*s", indent, "");
1095          Stream_write_string(f, "}\n");
1096          break;
1097        case PN_LIST:
1098          /* let definition */
1099          Stream_printf(f, "%*s", indent, "");
1100          instrument_expression(node, f);
1101          Stream_write_string(f, ";\n");
1102          break;
1103        default:
1104          abort();
1105          break;
1106        }
1107        break;
1108      case TOK_DEBUGGER:
1109        Stream_printf(f, "%*s", indent, "");
1110        Stream_write_string(f, "debugger;\n");
1111        break;
1112    default:    default:
1113      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);
1114    }    }
# Line 932  Line 1120 
1120  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1121  */  */
1122  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) {
1123    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1124      uint16_t line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1125      if (line > num_lines) {      if (line > num_lines) {
1126        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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