/[jscoverage]/trunk/instrument-js.c
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revision 214 by siliconforks, Fri Oct 3 02:26:04 2008 UTC revision 284 by siliconforks, Sat Oct 11 22:40:31 2008 UTC
# Line 27  Line 27 
27    
28  #include <jsapi.h>  #include <jsapi.h>
29  #include <jsatom.h>  #include <jsatom.h>
30    #include <jsexn.h>
31  #include <jsfun.h>  #include <jsfun.h>
32  #include <jsinterp.h>  #include <jsinterp.h>
33  #include <jsparse.h>  #include <jsparse.h>
# Line 40  Line 41 
41  #include "resource-manager.h"  #include "resource-manager.h"
42  #include "util.h"  #include "util.h"
43    
44    struct IfDirective {
45      const jschar * condition_start;
46      const jschar * condition_end;
47      uint16_t start_line;
48      uint16_t end_line;
49      struct IfDirective * next;
50    };
51    
52    static bool * exclusive_directives = NULL;
53    
54  static JSRuntime * runtime = NULL;  static JSRuntime * runtime = NULL;
55  static JSContext * context = NULL;  static JSContext * context = NULL;
56  static JSObject * global = NULL;  static JSObject * global = NULL;
# Line 78  Line 89 
89    JS_DestroyRuntime(runtime);    JS_DestroyRuntime(runtime);
90  }  }
91    
92    static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
93      for (size_t i = 0; i < num_characters; i++) {
94        jschar c = characters[i];
95        /*
96        XXX does not handle no-break space, other unicode "space separator"
97        */
98        switch (c) {
99        case 0x9:
100        case 0xB:
101        case 0xC:
102          Stream_write_char(f, c);
103          break;
104        default:
105          if (32 <= c && c <= 126) {
106            Stream_write_char(f, c);
107          }
108          else {
109            Stream_printf(f, "\\u%04x", c);
110          }
111          break;
112        }
113      }
114    }
115    
116  static void print_string(JSString * s, Stream * f) {  static void print_string(JSString * s, Stream * f) {
117    size_t length = JSSTRING_LENGTH(s);    size_t length = JSSTRING_LENGTH(s);
118    jschar * characters = JSSTRING_CHARS(s);    jschar * characters = JSSTRING_CHARS(s);
# Line 205  Line 240 
240  }  }
241    
242  static void instrument_expression(JSParseNode * node, Stream * f);  static void instrument_expression(JSParseNode * node, Stream * f);
243  static void instrument_statement(JSParseNode * node, Stream * f, int indent);  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
244    
245  enum FunctionType {  enum FunctionType {
246    FUNCTION_NORMAL,    FUNCTION_NORMAL,
# Line 261  Line 296 
296    free(params);    free(params);
297    
298    /* function body */    /* function body */
299    instrument_statement(node->pn_body, f, indent + 2);    instrument_statement(node->pn_body, f, indent + 2, false);
300    
301    Stream_write_string(f, "}\n");    Stream_write_string(f, "}\n");
302  }  }
# Line 620  Line 655 
655    }    }
656  }  }
657    
658  static void output_statement(JSParseNode * node, Stream * f, int indent) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
659    switch (node->pn_type) {    switch (node->pn_type) {
660    case TOK_FUNCTION:    case TOK_FUNCTION:
661      instrument_function(node, f, indent, FUNCTION_NORMAL);      instrument_function(node, f, indent, FUNCTION_NORMAL);
# Line 631  Line 666 
666      Stream_write_string(f, "{\n");      Stream_write_string(f, "{\n");
667  */  */
668      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) {
669        instrument_statement(p, f, indent);        instrument_statement(p, f, indent, false);
670      }      }
671  /*  /*
672      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
# Line 639  Line 674 
674  */  */
675      break;      break;
676    case TOK_IF:    case TOK_IF:
677      {
678      assert(node->pn_arity == PN_TERNARY);      assert(node->pn_arity == PN_TERNARY);
679    
680        uint16_t line = node->pn_pos.begin.lineno;
681        if (! is_jscoverage_if) {
682          if (line > num_lines) {
683            fatal("%s: script contains more than 65,535 lines", file_id);
684          }
685          if (line >= 2 && exclusive_directives[line - 2]) {
686            is_jscoverage_if = true;
687          }
688        }
689    
690      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
691      Stream_write_string(f, "if (");      Stream_write_string(f, "if (");
692      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
693      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
694      instrument_statement(node->pn_kid2, f, indent + 2);      if (is_jscoverage_if && node->pn_kid3) {
695          uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
696          uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
697          Stream_printf(f, "%*s", indent + 2, "");
698          Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
699        }
700        instrument_statement(node->pn_kid2, f, indent + 2, false);
701      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
702      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
703      if (node->pn_kid3) {  
704        if (node->pn_kid3 || is_jscoverage_if) {
705        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
706        Stream_write_string(f, "else {\n");        Stream_write_string(f, "else {\n");
707        instrument_statement(node->pn_kid3, f, indent + 2);  
708          if (is_jscoverage_if) {
709            uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
710            uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
711            Stream_printf(f, "%*s", indent + 2, "");
712            Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
713          }
714    
715          if (node->pn_kid3) {
716            instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
717          }
718    
719        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
720        Stream_write_string(f, "}\n");        Stream_write_string(f, "}\n");
721      }      }
722    
723      break;      break;
724      }
725    case TOK_SWITCH:    case TOK_SWITCH:
726      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
727      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
# Line 676  Line 743 
743          abort();          abort();
744          break;          break;
745        }        }
746        instrument_statement(p->pn_right, f, indent + 2);        instrument_statement(p->pn_right, f, indent + 2, false);
747      }      }
748      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
749      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
# Line 691  Line 758 
758      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
759      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
760      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
761      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
762      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
763      break;      break;
764    case TOK_DO:    case TOK_DO:
765      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
766      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
767      Stream_write_string(f, "do {\n");      Stream_write_string(f, "do {\n");
768      instrument_statement(node->pn_left, f, indent + 2);      instrument_statement(node->pn_left, f, indent + 2, false);
769      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
770      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
771      Stream_write_string(f, "while (");      Stream_write_string(f, "while (");
# Line 761  Line 828 
828        break;        break;
829      }      }
830      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
831      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
832      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
833      break;      break;
834    case TOK_THROW:    case TOK_THROW:
# Line 774  Line 841 
841    case TOK_TRY:    case TOK_TRY:
842      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
843      Stream_write_string(f, "try {\n");      Stream_write_string(f, "try {\n");
844      instrument_statement(node->pn_kid1, f, indent + 2);      instrument_statement(node->pn_kid1, f, indent + 2, false);
845      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
846      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
847      {      {
# Line 789  Line 856 
856            instrument_expression(catch->pn_kid1->pn_expr, f);            instrument_expression(catch->pn_kid1->pn_expr, f);
857          }          }
858          Stream_write_string(f, ") {\n");          Stream_write_string(f, ") {\n");
859          instrument_statement(catch->pn_kid3, f, indent + 2);          instrument_statement(catch->pn_kid3, f, indent + 2, false);
860          Stream_printf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
861          Stream_write_string(f, "}\n");          Stream_write_string(f, "}\n");
862        }        }
# Line 797  Line 864 
864      if (node->pn_kid3) {      if (node->pn_kid3) {
865        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
866        Stream_write_string(f, "finally {\n");        Stream_write_string(f, "finally {\n");
867        instrument_statement(node->pn_kid3, f, indent + 2);        instrument_statement(node->pn_kid3, f, indent + 2, false);
868        Stream_printf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
869        Stream_write_string(f, "}\n");        Stream_write_string(f, "}\n");
870      }      }
# Line 823  Line 890 
890      Stream_write_string(f, "with (");      Stream_write_string(f, "with (");
891      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
892      Stream_write_string(f, ") {\n");      Stream_write_string(f, ") {\n");
893      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
894      Stream_printf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
895      Stream_write_string(f, "}\n");      Stream_write_string(f, "}\n");
896      break;      break;
# Line 861  Line 928 
928      /*      /*
929      ... use output_statement instead of instrument_statement.      ... use output_statement instead of instrument_statement.
930      */      */
931      output_statement(node->pn_expr, f, indent);      output_statement(node->pn_expr, f, indent, false);
932      break;      break;
933    default:    default:
934      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 873  Line 940 
940  TOK_FUNCTION is handled as a statement and as an expression.  TOK_FUNCTION is handled as a statement and as an expression.
941  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
942  */  */
943  static void instrument_statement(JSParseNode * node, Stream * f, int indent) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
944    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC) {
945      uint16_t line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
946      if (line > num_lines) {      if (line > num_lines) {
# Line 887  Line 954 
954        lines[line - 1] = 1;        lines[line - 1] = 1;
955      }      }
956    }    }
957    output_statement(node, f, indent);    output_statement(node, f, indent, is_jscoverage_if);
958  }  }
959    
960  static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {  static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
# Line 909  Line 976 
976    }    }
977  }  }
978    
979    static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
980      /* XXX - other Unicode space */
981      const jschar * end = characters + line_end;
982      for (const jschar * p = characters + line_start; p < end; p++) {
983        jschar c = *p;
984        if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
985          continue;
986        }
987        else {
988          return false;
989        }
990      }
991      return true;
992    }
993    
994    static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
995      fprintf(stderr, "jscoverage: parse error: line %u: %s\n", report->lineno, message);
996    }
997    
998  void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {  void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
999    file_id = id;    file_id = id;
1000    
# Line 919  Line 1005 
1005    }    }
1006    
1007    /* parse the javascript */    /* parse the javascript */
1008      JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1009    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);
1010    if (node == NULL) {    if (node == NULL) {
1011        js_ReportUncaughtException(context);
1012      fatal("parse error in file: %s", file_id);      fatal("parse error in file: %s", file_id);
1013    }    }
1014      JS_SetErrorReporter(context, old_error_reporter);
1015    num_lines = node->pn_pos.end.lineno;    num_lines = node->pn_pos.end.lineno;
1016    lines = xmalloc(num_lines);    lines = xmalloc(num_lines);
1017    for (int i = 0; i < num_lines; i++) {    for (unsigned int i = 0; i < num_lines; i++) {
1018      lines[i] = 0;      lines[i] = 0;
1019    }    }
1020    
1021    /*    /* search code for conditionals */
1022    An instrumented JavaScript file has 3 sections:    exclusive_directives = xnew(bool, num_lines);
1023    1. initialization    for (unsigned int i = 0; i < num_lines; i++) {
1024    2. instrumented source code      exclusive_directives[i] = false;
   3. original source code  
   */  
   
   Stream * instrumented = Stream_new(0);  
   instrument_statement(node, instrumented, 0);  
   
   /* write line number info to the output */  
   Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");  
   Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");  
   Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");  
   Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);  
   Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);  
   for (int i = 0; i < num_lines; i++) {  
     if (lines[i]) {  
       Stream_printf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);  
     }  
1025    }    }
   Stream_write_string(output, "}\n");  
   free(lines);  
   lines = NULL;  
   
   /* copy the instrumented source code to the output */  
   Stream_write(output, instrumented->data, instrumented->length);  
1026    
   /* conditionals */  
1027    bool has_conditionals = false;    bool has_conditionals = false;
1028      struct IfDirective * if_directives = NULL;
1029    size_t line_number = 0;    size_t line_number = 0;
1030    size_t i = 0;    size_t i = 0;
1031    while (i < num_characters) {    while (i < num_characters) {
1032        if (line_number == UINT16_MAX) {
1033          fatal("%s: script has more than 65,535 lines", file_id);
1034        }
1035      line_number++;      line_number++;
1036      size_t line_start = i;      size_t line_start = i;
1037      jschar c;      jschar c;
# Line 977  Line 1047 
1047          break;          break;
1048        default:        default:
1049          i++;          i++;
         break;  
1050        }        }
1051      }      }
1052      size_t line_end = i;      size_t line_end = i;
# Line 987  Line 1056 
1056          i++;          i++;
1057        }        }
1058      }      }
1059    
1060      if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {      if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1061        if (! has_conditionals) {        has_conditionals = true;
1062          has_conditionals = true;  
1063          Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);        if (characters_are_white_space(characters, line_start + 16, line_end)) {
1064        }          exclusive_directives[line_number - 1] = true;
1065        Stream_write_string(output, "if (!(");        }
1066        for (size_t j = line_start + 16; j < line_end; j++) {        else {
1067          jschar c = characters[j];          struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1068          if (c == '\t' || (32 <= c && c <= 126)) {          if_directive->condition_start = characters + line_start + 16;
1069            Stream_write_char(output, c);          if_directive->condition_end = characters + line_end;
1070          }          if_directive->start_line = line_number;
1071          else {          if_directive->end_line = 0;
1072            Stream_printf(output, "\\u%04x", c);          if_directive->next = if_directives;
1073          }          if_directives = if_directive;
1074        }        }
       Stream_write_string(output, ")) {\n");  
       Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = ", file_id, line_number);  
1075      }      }
1076      else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {      else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1077        Stream_printf(output, "%d;\n", line_number);        for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1078        Stream_printf(output, "}\n");          if (p->end_line == 0) {
1079              p->end_line = line_number;
1080              break;
1081            }
1082          }
1083      }      }
1084    }    }
1085    
1086      /*
1087      An instrumented JavaScript file has 4 sections:
1088      1. initialization
1089      2. instrumented source code
1090      3. conditionals
1091      4. original source code
1092      */
1093    
1094      Stream * instrumented = Stream_new(0);
1095      instrument_statement(node, instrumented, 0, false);
1096    
1097      /* write line number info to the output */
1098      Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1099      Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");
1100      Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1101      Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1102      Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);
1103      for (int i = 0; i < num_lines; i++) {
1104        if (lines[i]) {
1105          Stream_printf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1106        }
1107      }
1108      Stream_write_string(output, "}\n");
1109      free(lines);
1110      lines = NULL;
1111      free(exclusive_directives);
1112      exclusive_directives = NULL;
1113    
1114      /* conditionals */
1115      if (has_conditionals) {
1116        Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1117      }
1118    
1119      /* copy the instrumented source code to the output */
1120      Stream_write(output, instrumented->data, instrumented->length);
1121    
1122      /* conditionals */
1123      for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1124        Stream_write_string(output, "if (!(");
1125        print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1126        Stream_write_string(output, ")) {\n");
1127        Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1128        Stream_write_string(output, "}\n");
1129      }
1130    
1131      /* free */
1132      while (if_directives != NULL) {
1133        struct IfDirective * if_directive = if_directives;
1134        if_directives = if_directives->next;
1135        free(if_directive);
1136      }
1137    
1138    /* copy the original source to the output */    /* copy the original source to the output */
1139    Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);    Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1140    jscoverage_write_source(id, characters, num_characters, output);    jscoverage_write_source(id, characters, num_characters, output);
# Line 1356  Line 1480 
1480        file_coverage->id = id;        file_coverage->id = id;
1481        file_coverage->num_coverage_lines = array->pn_count;        file_coverage->num_coverage_lines = array->pn_count;
1482        file_coverage->coverage_lines = xnew(int, array->pn_count);        file_coverage->coverage_lines = xnew(int, array->pn_count);
1483        if (source == NULL) {        file_coverage->source_lines = NULL;
         file_coverage->source_lines = NULL;  
       }  
       else {  
         file_coverage->num_source_lines = source->pn_count;  
         file_coverage->source_lines = xnew(char *, source->pn_count);  
         uint32 i = 0;  
         for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {  
           if (element->pn_type != TOK_STRING) {  
             return -1;  
           }  
           file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));  
         }  
         assert(i == source->pn_count);  
       }  
1484    
1485        /* set coverage for all lines */        /* set coverage for all lines */
1486        uint32 i = 0;        uint32 i = 0;
# Line 1420  Line 1530 
1530          }          }
1531        }        }
1532        assert(i == array->pn_count);        assert(i == array->pn_count);
1533        }
1534    
1535        /* if this JSON file has source, use it */      /* if this JSON file has source, use it */
1536        if (file_coverage->source_lines == NULL && source != NULL) {      if (file_coverage->source_lines == NULL && source != NULL) {
1537          file_coverage->num_source_lines = source->pn_count;        file_coverage->num_source_lines = source->pn_count;
1538          file_coverage->source_lines = xnew(char *, source->pn_count);        file_coverage->source_lines = xnew(char *, source->pn_count);
1539          uint32 i = 0;        uint32 i = 0;
1540          for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {        for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1541            if (element->pn_type != TOK_STRING) {          if (element->pn_type != TOK_STRING) {
1542              return -1;            return -1;
           }  
           file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));  
1543          }          }
1544          assert(i == source->pn_count);          file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1545        }        }
1546          assert(i == source->pn_count);
1547      }      }
1548    }    }
1549    

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