/[jscoverage]/trunk/instrument-js.cpp
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revision 2 by siliconforks, Wed Aug 1 13:51:53 2007 UTC revision 373 by siliconforks, Mon Oct 27 20:36:44 2008 UTC
# Line 1  Line 1 
1  /*  /*
2      instrument-js.c - JavaScript instrumentation routines      instrument-js.c - JavaScript instrumentation routines
3      Copyright (C) 2007 siliconforks.com      Copyright (C) 2007, 2008 siliconforks.com
4    
5      This program is free software; you can redistribute it and/or modify      This program is free software; you can redistribute it and/or modify
6      it under the terms of the GNU General Public License as published by      it under the terms of the GNU General Public License as published by
# Line 17  Line 17 
17      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.      51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18  */  */
19    
20    #include <config.h>
21    
22  #include "instrument-js.h"  #include "instrument-js.h"
23    
24  #include <assert.h>  #include <assert.h>
# Line 24  Line 26 
26  #include <string.h>  #include <string.h>
27    
28  #include <jsapi.h>  #include <jsapi.h>
29    #include <jsarena.h>
30  #include <jsatom.h>  #include <jsatom.h>
31    #include <jsemit.h>
32    #include <jsexn.h>
33  #include <jsfun.h>  #include <jsfun.h>
34  #include <jsinterp.h>  #include <jsinterp.h>
35    #include <jsiter.h>
36  #include <jsparse.h>  #include <jsparse.h>
37  #include <jsregexp.h>  #include <jsregexp.h>
38  #include <jsscope.h>  #include <jsscope.h>
39  #include <jsstr.h>  #include <jsstr.h>
40    
41    #include "encoding.h"
42    #include "global.h"
43    #include "highlight.h"
44    #include "resource-manager.h"
45  #include "util.h"  #include "util.h"
46    
47    struct IfDirective {
48      const jschar * condition_start;
49      const jschar * condition_end;
50      uint16_t start_line;
51      uint16_t end_line;
52      struct IfDirective * next;
53    };
54    
55    bool jscoverage_mozilla = false;
56    
57    static bool * exclusive_directives = NULL;
58    
59  static JSRuntime * runtime = NULL;  static JSRuntime * runtime = NULL;
60  static JSContext * context = NULL;  static JSContext * context = NULL;
61  static JSObject * global = NULL;  static JSObject * global = NULL;
62    static JSVersion js_version = JSVERSION_ECMA_3;
63    
64  /*  /*
65  JSParseNode objects store line numbers starting from 1.  JSParseNode objects store line numbers starting from 1.
# Line 44  Line 67 
67  */  */
68  static const char * file_id = NULL;  static const char * file_id = NULL;
69  static char * lines = NULL;  static char * lines = NULL;
70    static uint16_t num_lines = 0;
71    
72    void jscoverage_set_js_version(const char * version) {
73      js_version = JS_StringToVersion(version);
74      if (js_version != JSVERSION_UNKNOWN) {
75        return;
76      }
77    
78      char * end;
79      js_version = (JSVersion) strtol(version, &end, 10);
80      if ((size_t) (end - version) != strlen(version)) {
81        fatal("invalid version: %s", version);
82      }
83    }
84    
85  void jscoverage_init(void) {  void jscoverage_init(void) {
86    runtime = JS_NewRuntime(8L * 1024L * 1024L);    runtime = JS_NewRuntime(8L * 1024L * 1024L);
# Line 56  Line 93 
93      fatal("cannot create context");      fatal("cannot create context");
94    }    }
95    
96      JS_SetVersion(context, js_version);
97    
98    global = JS_NewObject(context, NULL, NULL, NULL);    global = JS_NewObject(context, NULL, NULL, NULL);
99    if (global == NULL) {    if (global == NULL) {
100      fatal("cannot create global object");      fatal("cannot create global object");
# Line 71  Line 110 
110    JS_DestroyRuntime(runtime);    JS_DestroyRuntime(runtime);
111  }  }
112    
113  static void print_string(JSString * s, FILE * f) {  static void print_javascript(const jschar * characters, size_t num_characters, Stream * f) {
114    for (int i = 0; i < s->length; i++) {    for (size_t i = 0; i < num_characters; i++) {
115      char c = s->chars[i];      jschar c = characters[i];
116      fputc(c, f);      /*
117        XXX does not handle no-break space, other unicode "space separator"
118        */
119        switch (c) {
120        case 0x9:
121        case 0xB:
122        case 0xC:
123          Stream_write_char(f, c);
124          break;
125        default:
126          if (32 <= c && c <= 126) {
127            Stream_write_char(f, c);
128          }
129          else {
130            Stream_printf(f, "\\u%04x", c);
131          }
132          break;
133        }
134    }    }
135  }  }
136    
137  static void print_string_atom(JSAtom * atom, FILE * f) {  static void print_string(JSString * s, Stream * f) {
138      size_t length = JSSTRING_LENGTH(s);
139      jschar * characters = JSSTRING_CHARS(s);
140      for (size_t i = 0; i < length; i++) {
141        jschar c = characters[i];
142        if (32 <= c && c <= 126) {
143          switch (c) {
144          case '"':
145            Stream_write_string(f, "\\\"");
146            break;
147    /*
148          case '\'':
149            Stream_write_string(f, "\\'");
150            break;
151    */
152          case '\\':
153            Stream_write_string(f, "\\\\");
154            break;
155          default:
156            Stream_write_char(f, c);
157            break;
158          }
159        }
160        else {
161          switch (c) {
162          case 0x8:
163            Stream_write_string(f, "\\b");
164            break;
165          case 0x9:
166            Stream_write_string(f, "\\t");
167            break;
168          case 0xa:
169            Stream_write_string(f, "\\n");
170            break;
171          /* IE doesn't support this */
172          /*
173          case 0xb:
174            Stream_write_string(f, "\\v");
175            break;
176          */
177          case 0xc:
178            Stream_write_string(f, "\\f");
179            break;
180          case 0xd:
181            Stream_write_string(f, "\\r");
182            break;
183          default:
184            Stream_printf(f, "\\u%04x", c);
185            break;
186          }
187        }
188      }
189    }
190    
191    static void print_string_atom(JSAtom * atom, Stream * f) {
192    assert(ATOM_IS_STRING(atom));    assert(ATOM_IS_STRING(atom));
193    JSString * s = ATOM_TO_STRING(atom);    JSString * s = ATOM_TO_STRING(atom);
194    print_string(s, f);    print_string(s, f);
195  }  }
196    
197  static void print_string_jsval(jsval value, FILE * f) {  static void print_regex(jsval value, Stream * f) {
198    assert(JSVAL_IS_STRING(value));    assert(JSVAL_IS_STRING(value));
199    JSString * s = JSVAL_TO_STRING(value);    JSString * s = JSVAL_TO_STRING(value);
200    print_string(s, f);    size_t length = JSSTRING_LENGTH(s);
201      jschar * characters = JSSTRING_CHARS(s);
202      for (size_t i = 0; i < length; i++) {
203        jschar c = characters[i];
204        if (32 <= c && c <= 126) {
205          Stream_write_char(f, c);
206        }
207        else {
208          Stream_printf(f, "\\u%04x", c);
209        }
210      }
211  }  }
212    
213  static void print_quoted_string_atom(JSAtom * atom, FILE * f) {  static void print_quoted_string_atom(JSAtom * atom, Stream * f) {
214    assert(ATOM_IS_STRING(atom));    assert(ATOM_IS_STRING(atom));
215    JSString * s = ATOM_TO_STRING(atom);    JSString * s = ATOM_TO_STRING(atom);
216    JSString * quoted = js_QuoteString(context, s, '"');    Stream_write_char(f, '"');
217    print_string(quoted, f);    print_string(s, f);
218      Stream_write_char(f, '"');
219  }  }
220    
221  static const char * get_op(uint8 op) {  static const char * get_op(uint8 op) {
222    switch(op) {    switch(op) {
223      case JSOP_OR:
224        return "||";
225      case JSOP_AND:
226        return "&&";
227    case JSOP_BITOR:    case JSOP_BITOR:
228      return "|";      return "|";
229    case JSOP_BITXOR:    case JSOP_BITXOR:
# Line 109  Line 234 
234      return "==";      return "==";
235    case JSOP_NE:    case JSOP_NE:
236      return "!=";      return "!=";
237    case JSOP_NEW_EQ:    case JSOP_STRICTEQ:
238      return "===";      return "===";
239    case JSOP_NEW_NE:    case JSOP_STRICTNE:
240      return "!==";      return "!==";
241    case JSOP_LT:    case JSOP_LT:
242      return "<";      return "<";
# Line 142  Line 267 
267    }    }
268  }  }
269    
270  static void instrument_expression(JSParseNode * node, FILE * f);  static void instrument_expression(JSParseNode * node, Stream * f);
271  static void instrument_statement(JSParseNode * node, FILE * f, int indent);  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
272    static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if);
273    
274    enum FunctionType {
275      FUNCTION_NORMAL,
276      FUNCTION_GETTER_OR_SETTER
277    };
278    
279    static void output_for_in(JSParseNode * node, Stream * f) {
280      assert(node->pn_type == TOK_FOR);
281      assert(node->pn_arity == PN_BINARY);
282      Stream_write_string(f, "for ");
283      if (node->pn_iflags & JSITER_FOREACH) {
284        Stream_write_string(f, "each ");
285      }
286      Stream_write_char(f, '(');
287      instrument_expression(node->pn_left, f);
288      Stream_write_char(f, ')');
289    }
290    
291  static void instrument_function(JSParseNode * node, FILE * f, int indent) {  static void output_array_comprehension_or_generator_expression(JSParseNode * node, Stream * f) {
292      assert(node->pn_arity == PN_FUNC);    assert(node->pn_type == TOK_LEXICALSCOPE);
293      assert(ATOM_IS_OBJECT(node->pn_funAtom));    assert(node->pn_arity == PN_NAME);
294      JSObject * object = ATOM_TO_OBJECT(node->pn_funAtom);    JSParseNode * for_node = node->pn_expr;
295      assert(JS_ObjectIsFunction(context, object));    assert(for_node->pn_type == TOK_FOR);
296      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);    assert(for_node->pn_arity == PN_BINARY);
297      assert(function);    JSParseNode * p = for_node;
298      assert(object == function->object);    while (p->pn_type == TOK_FOR) {
299      fprintf(f, "%*s", indent, "");      p = p->pn_right;
300      fprintf(f, "function");    }
301      JSParseNode * if_node = NULL;
302      /* function name */    if (p->pn_type == TOK_IF) {
303      if (function->atom) {      if_node = p;
304        fputc(' ', f);      assert(if_node->pn_arity == PN_TERNARY);
305        print_string_atom(function->atom, f);      p = if_node->pn_kid2;
306      }    }
307      assert(p->pn_arity == PN_UNARY);
308      /* function parameters */    p = p->pn_kid;
309      fprintf(f, "(");    if (p->pn_type == TOK_YIELD) {
310      JSAtom ** params = xmalloc(function->nargs * sizeof(JSAtom *));      /* for generator expressions */
311      for (int i = 0; i < function->nargs; i++) {      p = p->pn_kid;
312        /* initialize to NULL for sanity check */    }
313        params[i] = NULL;  
314      }    instrument_expression(p, f);
315      JSScope * scope = OBJ_SCOPE(object);    p = for_node;
316      for (JSScopeProperty * scope_property = SCOPE_LAST_PROP(scope); scope_property != NULL; scope_property = scope_property->parent) {    while (p->pn_type == TOK_FOR) {
317        if (scope_property->getter != js_GetArgument) {      Stream_write_char(f, ' ');
318          continue;      output_for_in(p, f);
319        }      p = p->pn_right;
320        assert(scope_property->flags & SPROP_HAS_SHORTID);    }
321        assert((uint16) scope_property->shortid < function->nargs);    if (if_node) {
322        assert(JSID_IS_ATOM(scope_property->id));      Stream_write_string(f, " if (");
323        params[(uint16) scope_property->shortid] = JSID_TO_ATOM(scope_property->id);      instrument_expression(if_node->pn_kid1, f);
324        Stream_write_char(f, ')');
325      }
326    }
327    
328    static void instrument_function(JSParseNode * node, Stream * f, int indent, enum FunctionType type) {
329      assert(node->pn_type == TOK_FUNCTION);
330      assert(node->pn_arity == PN_FUNC);
331      JSObject * object = node->pn_funpob->object;
332      assert(JS_ObjectIsFunction(context, object));
333      JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
334      assert(function);
335      assert(object == &function->object);
336      Stream_printf(f, "%*s", indent, "");
337      if (type == FUNCTION_NORMAL) {
338        Stream_write_string(f, "function ");
339      }
340    
341      /* function name */
342      if (function->atom) {
343        print_string_atom(function->atom, f);
344      }
345    
346      /*
347      function parameters - see JS_DecompileFunction in jsapi.cpp, which calls
348      js_DecompileFunction in jsopcode.cpp
349      */
350      Stream_write_char(f, '(');
351      JSArenaPool pool;
352      JS_INIT_ARENA_POOL(&pool, "instrument_function", 256, 1, &context->scriptStackQuota);
353      jsuword * local_names = NULL;
354      if (JS_GET_LOCAL_NAME_COUNT(function)) {
355        local_names = js_GetLocalNameArray(context, function, &pool);
356        if (local_names == NULL) {
357          fatal("out of memory");
358      }      }
359      for (int i = 0; i < function->nargs; i++) {    }
360        assert(params[i] != NULL);    bool destructuring = false;
361        if (i > 0) {    for (int i = 0; i < function->nargs; i++) {
362          fprintf(f, ", ");      if (i > 0) {
363        }        Stream_write_string(f, ", ");
364        if (ATOM_IS_STRING(params[i])) {      }
365          print_string_atom(params[i], f);      JSAtom * param = JS_LOCAL_NAME_TO_ATOM(local_names[i]);
366        if (param == NULL) {
367          destructuring = true;
368          JSParseNode * expression = NULL;
369          assert(node->pn_body->pn_type == TOK_LC || node->pn_body->pn_type == TOK_BODY);
370          JSParseNode * semi = node->pn_body->pn_head;
371          assert(semi->pn_type == TOK_SEMI);
372          JSParseNode * comma = semi->pn_kid;
373          assert(comma->pn_type == TOK_COMMA);
374          for (JSParseNode * p = comma->pn_head; p != NULL; p = p->pn_next) {
375            assert(p->pn_type == TOK_ASSIGN);
376            JSParseNode * rhs = p->pn_right;
377            assert(JSSTRING_LENGTH(ATOM_TO_STRING(rhs->pn_atom)) == 0);
378            if (rhs->pn_slot == i) {
379              expression = p->pn_left;
380              break;
381            }
382        }        }
383          assert(expression != NULL);
384          instrument_expression(expression, f);
385      }      }
386      fprintf(f, ") {\n");      else {
387      free(params);        print_string_atom(param, f);
388        }
389      }
390      JS_FinishArenaPool(&pool);
391      Stream_write_string(f, ") {\n");
392    
393      /* function body */    /* function body */
394      instrument_statement(node->pn_body, f, indent + 2);    if (function->flags & JSFUN_EXPR_CLOSURE) {
395        /* expression closure - use output_statement instead of instrument_statement */
396        if (node->pn_body->pn_type == TOK_BODY) {
397          assert(node->pn_body->pn_arity == PN_LIST);
398          assert(node->pn_body->pn_count == 2);
399          output_statement(node->pn_body->pn_head->pn_next, f, indent + 2, false);
400        }
401        else {
402          output_statement(node->pn_body, f, indent + 2, false);
403        }
404      }
405      else {
406        assert(node->pn_body->pn_type == TOK_LC);
407        assert(node->pn_body->pn_arity == PN_LIST);
408        JSParseNode * p = node->pn_body->pn_head;
409        if (destructuring) {
410          p = p->pn_next;
411        }
412        for (; p != NULL; p = p->pn_next) {
413          instrument_statement(p, f, indent + 2, false);
414        }
415      }
416    
417      fprintf(f, "}\n");    Stream_write_string(f, "}\n");
418  }  }
419    
420  static void instrument_function_call(JSParseNode * node, FILE * f) {  static void instrument_function_call(JSParseNode * node, Stream * f) {
421    instrument_expression(node->pn_head, f);    JSParseNode * function_node = node->pn_head;
422    fputc('(', f);    if (function_node->pn_type == TOK_FUNCTION) {
423    for (struct JSParseNode * p = node->pn_head->pn_next; p != NULL; p = p->pn_next) {      JSObject * object = function_node->pn_funpob->object;
424        assert(JS_ObjectIsFunction(context, object));
425        JSFunction * function = (JSFunction *) JS_GetPrivate(context, object);
426        assert(function);
427        assert(object == &function->object);
428    
429        if (function_node->pn_flags & TCF_GENEXP_LAMBDA) {
430          /* it's a generator expression */
431          Stream_write_char(f, '(');
432          output_array_comprehension_or_generator_expression(function_node->pn_body, f);
433          Stream_write_char(f, ')');
434          return;
435        }
436        else {
437          Stream_write_char(f, '(');
438          instrument_expression(function_node, f);
439          Stream_write_char(f, ')');
440        }
441      }
442      else {
443        instrument_expression(function_node, f);
444      }
445      Stream_write_char(f, '(');
446      for (struct JSParseNode * p = function_node->pn_next; p != NULL; p = p->pn_next) {
447      if (p != node->pn_head->pn_next) {      if (p != node->pn_head->pn_next) {
448        fprintf(f, ", ");        Stream_write_string(f, ", ");
449      }      }
450      instrument_expression(p, f);      instrument_expression(p, f);
451    }    }
452    fputc(')', f);    Stream_write_char(f, ')');
453    }
454    
455    static void instrument_declarations(JSParseNode * list, Stream * f) {
456      assert(list->pn_arity == PN_LIST);
457      for (JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
458        switch (p->pn_type) {
459        case TOK_NAME:
460          assert(p->pn_arity == PN_NAME);
461          if (p != list->pn_head) {
462            Stream_write_string(f, ", ");
463          }
464          print_string_atom(p->pn_atom, f);
465          if (p->pn_expr != NULL) {
466            Stream_write_string(f, " = ");
467            instrument_expression(p->pn_expr, f);
468          }
469          break;
470        case TOK_ASSIGN:
471        case TOK_RB:
472        case TOK_RC:
473          /* destructuring */
474          instrument_expression(p, f);
475          break;
476        default:
477          abort();
478          break;
479        }
480      }
481  }  }
482    
483  /*  /*
# Line 222  Line 493 
493  TOK_INSTANCEOF  binary  TOK_INSTANCEOF  binary
494  TOK_IN          binary  TOK_IN          binary
495  */  */
496  static void instrument_expression(JSParseNode * node, FILE * f) {  static void instrument_expression(JSParseNode * node, Stream * f) {
497    switch (node->pn_type) {    switch (node->pn_type) {
498    case TOK_FUNCTION:    case TOK_FUNCTION:
499      instrument_function(node, f, 0);      instrument_function(node, f, 0, FUNCTION_NORMAL);
500      break;      break;
501    case TOK_COMMA:    case TOK_COMMA:
502      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) {
503        if (p != node->pn_head) {        if (p != node->pn_head) {
504          fprintf(f, ", ");          Stream_write_string(f, ", ");
505        }        }
506        instrument_expression(p, f);        instrument_expression(p, f);
507      }      }
508      break;      break;
509    case TOK_ASSIGN:    case TOK_ASSIGN:
510      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
511      fputc(' ', f);      Stream_write_char(f, ' ');
512      switch (node->pn_op) {      switch (node->pn_op) {
513      case JSOP_ADD:      case JSOP_ADD:
514      case JSOP_SUB:      case JSOP_SUB:
# Line 250  Line 521 
521      case JSOP_BITOR:      case JSOP_BITOR:
522      case JSOP_BITXOR:      case JSOP_BITXOR:
523      case JSOP_DIV:      case JSOP_DIV:
524        fprintf(f, "%s", get_op(node->pn_op));        Stream_printf(f, "%s", get_op(node->pn_op));
525        break;        break;
526      default:      default:
527        /* do nothing - it must be a simple assignment */        /* do nothing - it must be a simple assignment */
528        break;        break;
529      }      }
530      fprintf(f, "= ");      Stream_write_string(f, "= ");
531      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
532      break;      break;
533    case TOK_HOOK:    case TOK_HOOK:
534      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
535      fprintf(f, "? ");      Stream_write_string(f, "? ");
536      instrument_expression(node->pn_kid2, f);      instrument_expression(node->pn_kid2, f);
537      fprintf(f, ": ");      Stream_write_string(f, ": ");
538      instrument_expression(node->pn_kid3, f);      instrument_expression(node->pn_kid3, f);
539      break;      break;
540    case TOK_OR:    case TOK_OR:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " || ");  
     instrument_expression(node->pn_right, f);  
     break;  
541    case TOK_AND:    case TOK_AND:
     instrument_expression(node->pn_left, f);  
     fprintf(f, " && ");  
     instrument_expression(node->pn_right, f);  
     break;  
542    case TOK_BITOR:    case TOK_BITOR:
543    case TOK_BITXOR:    case TOK_BITXOR:
544    case TOK_BITAND:    case TOK_BITAND:
# Line 289  Line 552 
552      switch (node->pn_arity) {      switch (node->pn_arity) {
553      case PN_BINARY:      case PN_BINARY:
554        instrument_expression(node->pn_left, f);        instrument_expression(node->pn_left, f);
555        fprintf(f, " %s ", get_op(node->pn_op));        Stream_printf(f, " %s ", get_op(node->pn_op));
556        instrument_expression(node->pn_right, f);        instrument_expression(node->pn_right, f);
557        break;        break;
558      case PN_LIST:      case PN_LIST:
559        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) {
560          if (p != node->pn_head) {          if (p != node->pn_head) {
561            fprintf(f, " %s ", get_op(node->pn_op));            Stream_printf(f, " %s ", get_op(node->pn_op));
562          }          }
563          instrument_expression(p, f);          instrument_expression(p, f);
564        }        }
# Line 307  Line 570 
570    case TOK_UNARYOP:    case TOK_UNARYOP:
571      switch (node->pn_op) {      switch (node->pn_op) {
572      case JSOP_NEG:      case JSOP_NEG:
573        fputc('-', f);        Stream_write_char(f, '-');
574        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
575        break;        break;
576      case JSOP_POS:      case JSOP_POS:
577        fputc('+', f);        Stream_write_char(f, '+');
578        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
579        break;        break;
580      case JSOP_NOT:      case JSOP_NOT:
581        fputc('!', f);        Stream_write_char(f, '!');
582        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
583        break;        break;
584      case JSOP_BITNOT:      case JSOP_BITNOT:
585        fputc('~', f);        Stream_write_char(f, '~');
586        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
587        break;        break;
588      case JSOP_TYPEOF:      case JSOP_TYPEOF:
589        fprintf(f, "typeof ");        Stream_write_string(f, "typeof ");
590        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
591        break;        break;
592      case JSOP_VOID:      case JSOP_VOID:
593        fprintf(f, "void ");        Stream_write_string(f, "void ");
594        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
595        break;        break;
596      default:      default:
597        abort();        fatal_source(file_id, node->pn_pos.begin.lineno, "unknown operator (%d)", node->pn_op);
598        break;        break;
599      }      }
600      break;      break;
# Line 344  Line 607 
607      case JSOP_INCNAME:      case JSOP_INCNAME:
608      case JSOP_INCPROP:      case JSOP_INCPROP:
609      case JSOP_INCELEM:      case JSOP_INCELEM:
610        fprintf(f, "++");        Stream_write_string(f, "++");
611        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
612        break;        break;
613      case JSOP_DECNAME:      case JSOP_DECNAME:
614      case JSOP_DECPROP:      case JSOP_DECPROP:
615      case JSOP_DECELEM:      case JSOP_DECELEM:
616        fprintf(f, "--");        Stream_write_string(f, "--");
617        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
618        break;        break;
619      case JSOP_NAMEINC:      case JSOP_NAMEINC:
620      case JSOP_PROPINC:      case JSOP_PROPINC:
621      case JSOP_ELEMINC:      case JSOP_ELEMINC:
622        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
623        fprintf(f, "++");        Stream_write_string(f, "++");
624        break;        break;
625      case JSOP_NAMEDEC:      case JSOP_NAMEDEC:
626      case JSOP_PROPDEC:      case JSOP_PROPDEC:
627      case JSOP_ELEMDEC:      case JSOP_ELEMDEC:
628        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
629        fprintf(f, "--");        Stream_write_string(f, "--");
630        break;        break;
631      default:      default:
632        abort();        abort();
# Line 371  Line 634 
634      }      }
635      break;      break;
636    case TOK_NEW:    case TOK_NEW:
637      fprintf(f, "new ");      Stream_write_string(f, "new ");
638      instrument_function_call(node, f);      instrument_function_call(node, f);
639      break;      break;
640    case TOK_DELETE:    case TOK_DELETE:
641      fprintf(f, "delete ");      Stream_write_string(f, "delete ");
642      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
643      break;      break;
644    case TOK_DOT:    case TOK_DOT:
# Line 385  Line 648 
648      the dot syntax.      the dot syntax.
649      */      */
650      instrument_expression(node->pn_expr, f);      instrument_expression(node->pn_expr, f);
651      /*      assert(ATOM_IS_STRING(node->pn_atom));
652      fputc('.', f);      {
653      print_string_atom(node->pn_atom, f);        JSString * s = ATOM_TO_STRING(node->pn_atom);
654      */        bool must_quote;
655      fputc('[', f);        if (JSSTRING_LENGTH(s) == 0) {
656      print_quoted_string_atom(node->pn_atom, f);          must_quote = true;
657      fputc(']', f);        }
658          else if (js_CheckKeyword(JSSTRING_CHARS(s), JSSTRING_LENGTH(s)) != TOK_EOF) {
659            must_quote = true;
660          }
661          else if (! js_IsIdentifier(s)) {
662            must_quote = true;
663          }
664          else {
665            must_quote = false;
666          }
667          if (must_quote) {
668            Stream_write_char(f, '[');
669            print_quoted_string_atom(node->pn_atom, f);
670            Stream_write_char(f, ']');
671          }
672          else {
673            Stream_write_char(f, '.');
674            print_string_atom(node->pn_atom, f);
675          }
676        }
677      break;      break;
678    case TOK_LB:    case TOK_LB:
679      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
680      fputc('[', f);      Stream_write_char(f, '[');
681      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
682      fputc(']', f);      Stream_write_char(f, ']');
683      break;      break;
684    case TOK_LP:    case TOK_LP:
685      instrument_function_call(node, f);      instrument_function_call(node, f);
686      break;      break;
687    case TOK_RB:    case TOK_RB:
688      fputc('[', f);      Stream_write_char(f, '[');
689      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) {
690        if (p != node->pn_head) {        if (p != node->pn_head) {
691          fprintf(f, ", ");          Stream_write_string(f, ", ");
692        }        }
693        /* TOK_COMMA is a special case: a hole in the array */        /* TOK_COMMA is a special case: a hole in the array */
694        if (p->pn_type != TOK_COMMA) {        if (p->pn_type != TOK_COMMA) {
# Line 414  Line 696 
696        }        }
697      }      }
698      if (node->pn_extra == PNX_ENDCOMMA) {      if (node->pn_extra == PNX_ENDCOMMA) {
699        fputc(',', f);        Stream_write_char(f, ',');
700      }      }
701      fputc(']', f);      Stream_write_char(f, ']');
702      break;      break;
703    case TOK_RC:    case TOK_RC:
704      fputc('{', f);      Stream_write_char(f, '{');
705      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) {
706        assert(p->pn_type == TOK_COLON);        if (p->pn_type != TOK_COLON) {
707            fatal_source(file_id, p->pn_pos.begin.lineno, "unsupported node type (%d)", p->pn_type);
708          }
709        if (p != node->pn_head) {        if (p != node->pn_head) {
710          fprintf(f, ", ");          Stream_write_string(f, ", ");
711          }
712    
713          /* check whether this is a getter or setter */
714          switch (p->pn_op) {
715          case JSOP_GETTER:
716          case JSOP_SETTER:
717            if (p->pn_op == JSOP_GETTER) {
718              Stream_write_string(f, "get ");
719            }
720            else {
721              Stream_write_string(f, "set ");
722            }
723            instrument_expression(p->pn_left, f);
724            if (p->pn_right->pn_type != TOK_FUNCTION) {
725              fatal_source(file_id, p->pn_pos.begin.lineno, "expected function");
726            }
727            instrument_function(p->pn_right, f, 0, FUNCTION_GETTER_OR_SETTER);
728            break;
729          default:
730            instrument_expression(p->pn_left, f);
731            Stream_write_string(f, ": ");
732            instrument_expression(p->pn_right, f);
733            break;
734        }        }
       instrument_expression(p->pn_left, f);  
       fprintf(f, ": ");  
       instrument_expression(p->pn_right, f);  
735      }      }
736      fputc('}', f);      Stream_write_char(f, '}');
737      break;      break;
738    case TOK_RP:    case TOK_RP:
739      fputc('(', f);      Stream_write_char(f, '(');
740      instrument_expression(node->pn_kid, f);      instrument_expression(node->pn_kid, f);
741      fputc(')', f);      Stream_write_char(f, ')');
742      break;      break;
743    case TOK_NAME:    case TOK_NAME:
744      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
# Line 442  Line 746 
746    case TOK_STRING:    case TOK_STRING:
747      print_quoted_string_atom(node->pn_atom, f);      print_quoted_string_atom(node->pn_atom, f);
748      break;      break;
749    case TOK_OBJECT:    case TOK_REGEXP:
750      switch (node->pn_op) {      assert(node->pn_op == JSOP_REGEXP);
751      case JSOP_OBJECT:      {
752        /* I assume this is JSOP_REGEXP */        JSObject * object = node->pn_pob->object;
753        abort();        jsval result;
754        break;        js_regexp_toString(context, object, &result);
755      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;  
756      }      }
757      break;      break;
758    case TOK_NUMBER:    case TOK_NUMBER:
# Line 470  Line 763 
763      To keep the output simple, special-case zero.      To keep the output simple, special-case zero.
764      */      */
765      if (node->pn_dval == 0.0) {      if (node->pn_dval == 0.0) {
766        fprintf(f, "0");        Stream_write_string(f, "0");
767      }      }
768      else {      else {
769        fprintf(f, "%.15g", node->pn_dval);        Stream_printf(f, "%.15g", node->pn_dval);
770      }      }
771      break;      break;
772    case TOK_PRIMARY:    case TOK_PRIMARY:
773      switch (node->pn_op) {      switch (node->pn_op) {
774      case JSOP_TRUE:      case JSOP_TRUE:
775        fprintf(f, "true");        Stream_write_string(f, "true");
776        break;        break;
777      case JSOP_FALSE:      case JSOP_FALSE:
778        fprintf(f, "false");        Stream_write_string(f, "false");
779        break;        break;
780      case JSOP_NULL:      case JSOP_NULL:
781        fprintf(f, "null");        Stream_write_string(f, "null");
782        break;        break;
783      case JSOP_THIS:      case JSOP_THIS:
784        fprintf(f, "this");        Stream_write_string(f, "this");
785        break;        break;
786      /* jsscan.h mentions `super' ??? */      /* jsscan.h mentions `super' ??? */
787      default:      default:
# Line 497  Line 790 
790      break;      break;
791    case TOK_INSTANCEOF:    case TOK_INSTANCEOF:
792      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
793      fprintf(f, " instanceof ");      Stream_write_string(f, " instanceof ");
794      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
795      break;      break;
796    case TOK_IN:    case TOK_IN:
797      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
798      fprintf(f, " in ");      Stream_write_string(f, " in ");
799      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
800      break;      break;
801    default:    case TOK_LEXICALSCOPE:
802      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      assert(node->pn_arity == PN_NAME);
803    }      assert(node->pn_expr->pn_type == TOK_LET);
804  }      assert(node->pn_expr->pn_arity == PN_BINARY);
805        Stream_write_string(f, "let(");
806  static void instrument_var_statement(JSParseNode * node, FILE * f, int indent) {      assert(node->pn_expr->pn_left->pn_type == TOK_LP);
807    assert(node->pn_arity == PN_LIST);      assert(node->pn_expr->pn_left->pn_arity == PN_LIST);
808    fprintf(f, "%*s", indent, "");      instrument_declarations(node->pn_expr->pn_left, f);
809    fprintf(f, "var ");      Stream_write_string(f, ") ");
810    for (struct JSParseNode * p = node->pn_u.list.head; p != NULL; p = p->pn_next) {      instrument_expression(node->pn_expr->pn_right, f);
811      assert(p->pn_type == TOK_NAME);      break;
812      assert(p->pn_arity == PN_NAME);    case TOK_YIELD:
813      if (p != node->pn_head) {      assert(node->pn_arity == PN_UNARY);
814        fprintf(f, ", ");      Stream_write_string(f, "yield");
815        if (node->pn_kid != NULL) {
816          Stream_write_char(f, ' ');
817          instrument_expression(node->pn_kid, f);
818      }      }
819      print_string_atom(p->pn_atom, f);      break;
820      if (p->pn_expr != NULL) {    case TOK_ARRAYCOMP:
821        fprintf(f, " = ");      assert(node->pn_arity == PN_LIST);
822        instrument_expression(p->pn_expr, f);      {
823          JSParseNode * block_node;
824          switch (node->pn_count) {
825          case 1:
826            block_node = node->pn_head;
827            break;
828          case 2:
829            block_node = node->pn_head->pn_next;
830            break;
831          default:
832            abort();
833            break;
834          }
835          Stream_write_char(f, '[');
836          output_array_comprehension_or_generator_expression(block_node, f);
837          Stream_write_char(f, ']');
838      }      }
839        break;
840      case TOK_VAR:
841        assert(node->pn_arity == PN_LIST);
842        Stream_write_string(f, "var ");
843        instrument_declarations(node, f);
844        break;
845      case TOK_LET:
846        assert(node->pn_arity == PN_LIST);
847        Stream_write_string(f, "let ");
848        instrument_declarations(node, f);
849        break;
850      default:
851        fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
852    }    }
853  }  }
854    
855  static void output_statement(JSParseNode * node, FILE * f, int indent) {  static void output_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
856    switch (node->pn_type) {    switch (node->pn_type) {
857    case TOK_FUNCTION:    case TOK_FUNCTION:
858      instrument_function(node, f, indent);      instrument_function(node, f, indent, FUNCTION_NORMAL);
859      break;      break;
860    case TOK_LC:    case TOK_LC:
861      assert(node->pn_arity == PN_LIST);      assert(node->pn_arity == PN_LIST);
862  /*  /*
863      fprintf(f, "{\n");      Stream_write_string(f, "{\n");
864  */  */
865      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) {
866        instrument_statement(p, f, indent);        instrument_statement(p, f, indent, false);
867      }      }
868  /*  /*
869      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
870      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
871  */  */
872      break;      break;
873    case TOK_IF:    case TOK_IF:
874      {
875      assert(node->pn_arity == PN_TERNARY);      assert(node->pn_arity == PN_TERNARY);
876      fprintf(f, "%*s", indent, "");  
877      fprintf(f, "if (");      uint16_t line = node->pn_pos.begin.lineno;
878        if (! is_jscoverage_if) {
879          if (line > num_lines) {
880            fatal("file %s contains more than 65,535 lines", file_id);
881          }
882          if (line >= 2 && exclusive_directives[line - 2]) {
883            is_jscoverage_if = true;
884          }
885        }
886    
887        Stream_printf(f, "%*s", indent, "");
888        Stream_write_string(f, "if (");
889      instrument_expression(node->pn_kid1, f);      instrument_expression(node->pn_kid1, f);
890      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
891      instrument_statement(node->pn_kid2, f, indent + 2);      if (is_jscoverage_if && node->pn_kid3) {
892      fprintf(f, "%*s", indent, "");        uint16_t else_start = node->pn_kid3->pn_pos.begin.lineno;
893      fprintf(f, "}\n");        uint16_t else_end = node->pn_kid3->pn_pos.end.lineno + 1;
894      if (node->pn_kid3) {        Stream_printf(f, "%*s", indent + 2, "");
895        fprintf(f, "%*s", indent, "");        Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, else_start, else_end);
896        fprintf(f, "else {\n");      }
897        instrument_statement(node->pn_kid3, f, indent + 2);      instrument_statement(node->pn_kid2, f, indent + 2, false);
898        fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
899        fprintf(f, "}\n");      Stream_write_string(f, "}\n");
900    
901        if (node->pn_kid3 || is_jscoverage_if) {
902          Stream_printf(f, "%*s", indent, "");
903          Stream_write_string(f, "else {\n");
904    
905          if (is_jscoverage_if) {
906            uint16_t if_start = node->pn_kid2->pn_pos.begin.lineno + 1;
907            uint16_t if_end = node->pn_kid2->pn_pos.end.lineno + 1;
908            Stream_printf(f, "%*s", indent + 2, "");
909            Stream_printf(f, "_$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_start, if_end);
910          }
911    
912          if (node->pn_kid3) {
913            instrument_statement(node->pn_kid3, f, indent + 2, is_jscoverage_if);
914          }
915    
916          Stream_printf(f, "%*s", indent, "");
917          Stream_write_string(f, "}\n");
918      }      }
919    
920      break;      break;
921      }
922    case TOK_SWITCH:    case TOK_SWITCH:
923      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
924      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
925      fprintf(f, "switch (");      Stream_write_string(f, "switch (");
926      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
927      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
928      for (struct JSParseNode * p = node->pn_right->pn_head; p != NULL; p = p->pn_next) {      {
929        fprintf(f, "%*s", indent, "");        JSParseNode * list = node->pn_right;
930        switch (p->pn_type) {        if (list->pn_type == TOK_LEXICALSCOPE) {
931        case TOK_CASE:          list = list->pn_expr;
932          fprintf(f, "case ");        }
933          instrument_expression(p->pn_left, f);        for (struct JSParseNode * p = list->pn_head; p != NULL; p = p->pn_next) {
934          fprintf(f, ":\n");          Stream_printf(f, "%*s", indent, "");
935          break;          switch (p->pn_type) {
936        case TOK_DEFAULT:          case TOK_CASE:
937          fprintf(f, "default:\n");            Stream_write_string(f, "case ");
938          break;            instrument_expression(p->pn_left, f);
939        default:            Stream_write_string(f, ":\n");
940          abort();            break;
941          break;          case TOK_DEFAULT:
942              Stream_write_string(f, "default:\n");
943              break;
944            default:
945              abort();
946              break;
947            }
948            instrument_statement(p->pn_right, f, indent + 2, false);
949        }        }
       instrument_statement(p->pn_right, f, indent + 2);  
950      }      }
951      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
952      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
953      break;      break;
954    case TOK_CASE:    case TOK_CASE:
955    case TOK_DEFAULT:    case TOK_DEFAULT:
# Line 595  Line 957 
957      break;      break;
958    case TOK_WHILE:    case TOK_WHILE:
959      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
960      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
961      fprintf(f, "while (");      Stream_write_string(f, "while (");
962      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
963      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
964      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
965      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
966      break;      break;
967    case TOK_DO:    case TOK_DO:
968      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
969      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
970      fprintf(f, "do {\n");      Stream_write_string(f, "do {\n");
971      instrument_statement(node->pn_left, f, indent + 2);      instrument_statement(node->pn_left, f, indent + 2, false);
972      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
973      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
974      fprintf(f, "while (");      Stream_write_string(f, "while (");
975      instrument_expression(node->pn_right, f);      instrument_expression(node->pn_right, f);
976      fprintf(f, ");\n");      Stream_write_string(f, ");\n");
977      break;      break;
978    case TOK_FOR:    case TOK_FOR:
979      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
980      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
     fprintf(f, "for (");  
981      switch (node->pn_left->pn_type) {      switch (node->pn_left->pn_type) {
982      case TOK_IN:      case TOK_IN:
983        /* for/in */        /* for/in */
984        assert(node->pn_left->pn_arity == PN_BINARY);        assert(node->pn_left->pn_arity == PN_BINARY);
985        switch (node->pn_left->pn_left->pn_type) {        output_for_in(node, f);
       case TOK_VAR:  
         instrument_var_statement(node->pn_left->pn_left, f, 0);  
         break;  
       case TOK_NAME:  
         instrument_expression(node->pn_left->pn_left, f);  
         break;  
       default:  
         /* this is undocumented: for (x.value in y) */  
         instrument_expression(node->pn_left->pn_left, f);  
         break;  
 /*  
       default:  
         fprintf(stderr, "unexpected node type: %d\n", node->pn_left->pn_left->pn_type);  
         abort();  
         break;  
 */  
       }  
       fprintf(f, " in ");  
       instrument_expression(node->pn_left->pn_right, f);  
986        break;        break;
987      case TOK_RESERVED:      case TOK_RESERVED:
988        /* for (;;) */        /* for (;;) */
989        assert(node->pn_left->pn_arity == PN_TERNARY);        assert(node->pn_left->pn_arity == PN_TERNARY);
990          Stream_write_string(f, "for (");
991        if (node->pn_left->pn_kid1) {        if (node->pn_left->pn_kid1) {
992          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);  
         }  
993        }        }
994        fprintf(f, ";");        Stream_write_string(f, ";");
995        if (node->pn_left->pn_kid2) {        if (node->pn_left->pn_kid2) {
996          fputc(' ', f);          Stream_write_char(f, ' ');
997          instrument_expression(node->pn_left->pn_kid2, f);          instrument_expression(node->pn_left->pn_kid2, f);
998        }        }
999        fprintf(f, ";");        Stream_write_string(f, ";");
1000        if (node->pn_left->pn_kid3) {        if (node->pn_left->pn_kid3) {
1001          fputc(' ', f);          Stream_write_char(f, ' ');
1002          instrument_expression(node->pn_left->pn_kid3, f);          instrument_expression(node->pn_left->pn_kid3, f);
1003        }        }
1004          Stream_write_char(f, ')');
1005        break;        break;
1006      default:      default:
1007        abort();        abort();
1008        break;        break;
1009      }      }
1010      fprintf(f, ") {\n");      Stream_write_string(f, " {\n");
1011      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1012      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1013      break;      break;
1014    case TOK_THROW:    case TOK_THROW:
1015      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1016      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1017      fprintf(f, "throw ");      Stream_write_string(f, "throw ");
1018      instrument_expression(node->pn_u.unary.kid, f);      instrument_expression(node->pn_u.unary.kid, f);
1019      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1020      break;      break;
1021    case TOK_TRY:    case TOK_TRY:
1022      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1023      fprintf(f, "try {\n");      Stream_write_string(f, "try {\n");
1024      instrument_statement(node->pn_kid1, f, indent + 2);      instrument_statement(node->pn_kid1, f, indent + 2, false);
1025      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1026      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1027      {      if (node->pn_kid2) {
1028        for (JSParseNode * catch = node->pn_kid2; catch != NULL; catch = catch->pn_kid2) {        assert(node->pn_kid2->pn_type == TOK_RESERVED);
1029          for (JSParseNode * scope = node->pn_kid2->pn_head; scope != NULL; scope = scope->pn_next) {
1030            assert(scope->pn_type == TOK_LEXICALSCOPE);
1031            JSParseNode * catch = scope->pn_expr;
1032          assert(catch->pn_type == TOK_CATCH);          assert(catch->pn_type == TOK_CATCH);
1033          fprintf(f, "%*s", indent, "");          Stream_printf(f, "%*s", indent, "");
1034          fprintf(f, "catch (");          Stream_write_string(f, "catch (");
1035            /* this may not be a name - destructuring assignment */
1036            /*
1037          assert(catch->pn_kid1->pn_arity == PN_NAME);          assert(catch->pn_kid1->pn_arity == PN_NAME);
1038          print_string_atom(catch->pn_kid1->pn_atom, f);          print_string_atom(catch->pn_kid1->pn_atom, f);
1039          if (catch->pn_kid1->pn_expr) {          */
1040            fprintf(f, " if ");          instrument_expression(catch->pn_kid1, f);
1041            instrument_expression(catch->pn_kid1->pn_expr, f);          if (catch->pn_kid2) {
1042          }            Stream_write_string(f, " if ");
1043          fprintf(f, ") {\n");            instrument_expression(catch->pn_kid2, f);
1044          instrument_statement(catch->pn_kid3, f, indent + 2);          }
1045          fprintf(f, "%*s", indent, "");          Stream_write_string(f, ") {\n");
1046          fprintf(f, "}\n");          instrument_statement(catch->pn_kid3, f, indent + 2, false);
1047            Stream_printf(f, "%*s", indent, "");
1048            Stream_write_string(f, "}\n");
1049        }        }
1050      }      }
1051      if (node->pn_kid3) {      if (node->pn_kid3) {
1052        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1053        fprintf(f, "finally {\n");        Stream_write_string(f, "finally {\n");
1054        instrument_statement(node->pn_kid3, f, indent + 2);        instrument_statement(node->pn_kid3, f, indent + 2, false);
1055        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1056        fprintf(f, "}\n");        Stream_write_string(f, "}\n");
1057      }      }
1058      break;      break;
1059    case TOK_CATCH:    case TOK_CATCH:
# Line 716  Line 1062 
1062    case TOK_BREAK:    case TOK_BREAK:
1063    case TOK_CONTINUE:    case TOK_CONTINUE:
1064      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);      assert(node->pn_arity == PN_NAME || node->pn_arity == PN_NULLARY);
1065      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1066      fputs(node->pn_type == TOK_BREAK? "break": "continue", f);      Stream_write_string(f, node->pn_type == TOK_BREAK? "break": "continue");
1067      JSAtom * atom = node->pn_u.name.atom;      JSAtom * atom = node->pn_u.name.atom;
1068      if (atom != NULL) {      if (atom != NULL) {
1069        fputc(' ', f);        Stream_write_char(f, ' ');
1070        print_string_atom(node->pn_atom, f);        print_string_atom(node->pn_atom, f);
1071      }      }
1072      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1073      break;      break;
1074    case TOK_WITH:    case TOK_WITH:
1075      assert(node->pn_arity == PN_BINARY);      assert(node->pn_arity == PN_BINARY);
1076      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1077      fprintf(f, "with (");      Stream_write_string(f, "with (");
1078      instrument_expression(node->pn_left, f);      instrument_expression(node->pn_left, f);
1079      fprintf(f, ") {\n");      Stream_write_string(f, ") {\n");
1080      instrument_statement(node->pn_right, f, indent + 2);      instrument_statement(node->pn_right, f, indent + 2, false);
1081      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1082      fprintf(f, "}\n");      Stream_write_string(f, "}\n");
1083      break;      break;
1084    case TOK_VAR:    case TOK_VAR:
1085      instrument_var_statement(node, f, indent);      Stream_printf(f, "%*s", indent, "");
1086      fprintf(f, ";\n");      instrument_expression(node, f);
1087        Stream_write_string(f, ";\n");
1088      break;      break;
1089    case TOK_RETURN:    case TOK_RETURN:
1090      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1091      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1092      fprintf(f, "return");      Stream_write_string(f, "return");
1093      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1094        fprintf(f, " ");        Stream_write_char(f, ' ');
1095        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1096      }      }
1097      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1098      break;      break;
1099    case TOK_SEMI:    case TOK_SEMI:
1100      assert(node->pn_arity == PN_UNARY);      assert(node->pn_arity == PN_UNARY);
1101      fprintf(f, "%*s", indent, "");      Stream_printf(f, "%*s", indent, "");
1102      if (node->pn_kid != NULL) {      if (node->pn_kid != NULL) {
1103        instrument_expression(node->pn_kid, f);        instrument_expression(node->pn_kid, f);
1104      }      }
1105      fprintf(f, ";\n");      Stream_write_string(f, ";\n");
1106      break;      break;
1107    case TOK_COLON:    case TOK_COLON:
1108      assert(node->pn_arity == PN_NAME);      assert(node->pn_arity == PN_NAME);
# Line 763  Line 1110 
1110      This one is tricky: can't output instrumentation between the label and the      This one is tricky: can't output instrumentation between the label and the
1111      statement it's supposed to label ...      statement it's supposed to label ...
1112      */      */
1113      fprintf(f, "%*s", indent < 2? 0: indent - 2, "");      Stream_printf(f, "%*s", indent < 2? 0: indent - 2, "");
1114      print_string_atom(node->pn_atom, f);      print_string_atom(node->pn_atom, f);
1115      fprintf(f, ":\n");      Stream_write_string(f, ":\n");
1116      /*      /*
1117      ... use output_statement instead of instrument_statement.      ... use output_statement instead of instrument_statement.
1118      */      */
1119      output_statement(node->pn_expr, f, indent);      output_statement(node->pn_expr, f, indent, false);
1120        break;
1121      case TOK_LEXICALSCOPE:
1122        /* let statement */
1123        assert(node->pn_arity == PN_NAME);
1124        switch (node->pn_expr->pn_type) {
1125        case TOK_LET:
1126          /* let statement */
1127          assert(node->pn_expr->pn_arity == PN_BINARY);
1128          instrument_statement(node->pn_expr, f, indent, false);
1129          break;
1130        case TOK_LC:
1131          /* block */
1132          Stream_printf(f, "%*s", indent, "");
1133          Stream_write_string(f, "{\n");
1134          instrument_statement(node->pn_expr, f, indent + 2, false);
1135          Stream_printf(f, "%*s", indent, "");
1136          Stream_write_string(f, "}\n");
1137          break;
1138        case TOK_FOR:
1139          instrument_statement(node->pn_expr, f, indent, false);
1140          break;
1141        default:
1142          abort();
1143          break;
1144        }
1145        break;
1146      case TOK_LET:
1147        switch (node->pn_arity) {
1148        case PN_BINARY:
1149          /* let statement */
1150          Stream_printf(f, "%*s", indent, "");
1151          Stream_write_string(f, "let (");
1152          assert(node->pn_left->pn_type == TOK_LP);
1153          assert(node->pn_left->pn_arity == PN_LIST);
1154          instrument_declarations(node->pn_left, f);
1155          Stream_write_string(f, ") {\n");
1156          instrument_statement(node->pn_right, f, indent + 2, false);
1157          Stream_printf(f, "%*s", indent, "");
1158          Stream_write_string(f, "}\n");
1159          break;
1160        case PN_LIST:
1161          /* let definition */
1162          Stream_printf(f, "%*s", indent, "");
1163          instrument_expression(node, f);
1164          Stream_write_string(f, ";\n");
1165          break;
1166        default:
1167          abort();
1168          break;
1169        }
1170        break;
1171      case TOK_DEBUGGER:
1172        Stream_printf(f, "%*s", indent, "");
1173        Stream_write_string(f, "debugger;\n");
1174      break;      break;
1175    default:    default:
1176      fatal("unsupported node type in file %s: %d", file_id, node->pn_type);      fatal_source(file_id, node->pn_pos.begin.lineno, "unsupported node type (%d)", node->pn_type);
1177    }    }
1178  }  }
1179    
# Line 781  Line 1182 
1182  TOK_FUNCTION is handled as a statement and as an expression.  TOK_FUNCTION is handled as a statement and as an expression.
1183  TOK_EXPORT, TOK_IMPORT are not handled.  TOK_EXPORT, TOK_IMPORT are not handled.
1184  */  */
1185  static void instrument_statement(JSParseNode * node, FILE * f, int indent) {  static void instrument_statement(JSParseNode * node, Stream * f, int indent, bool is_jscoverage_if) {
1186    if (node->pn_type != TOK_LC) {    if (node->pn_type != TOK_LC && node->pn_type != TOK_LEXICALSCOPE) {
1187      int line = node->pn_pos.begin.lineno;      uint16_t line = node->pn_pos.begin.lineno;
1188        if (line > num_lines) {
1189          fatal("file %s contains more than 65,535 lines", file_id);
1190        }
1191    
1192      /* the root node has line number 0 */      /* the root node has line number 0 */
1193      if (line != 0) {      if (line != 0) {
1194        fprintf(f, "%*s", indent, "");        Stream_printf(f, "%*s", indent, "");
1195        fprintf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);        Stream_printf(f, "_$jscoverage['%s'][%d]++;\n", file_id, line);
1196        lines[line - 1] = 1;        lines[line - 1] = 1;
1197      }      }
1198    }    }
1199    output_statement(node, f, indent);    output_statement(node, f, indent, is_jscoverage_if);
1200  }  }
1201    
1202  static void instrument_js_stream(const char * id, int line, FILE * input, FILE * output) {  static bool characters_start_with(const jschar * characters, size_t line_start, size_t line_end, const char * prefix) {
1203    file_id = id;    const jschar * characters_end = characters + line_end;
1204      const jschar * cp = characters + line_start;
1205      const char * bp = prefix;
1206      for (;;) {
1207        if (*bp == '\0') {
1208          return true;
1209        }
1210        else if (cp == characters_end) {
1211          return false;
1212        }
1213        else if (*cp != *bp) {
1214          return false;
1215        }
1216        bp++;
1217        cp++;
1218      }
1219    }
1220    
1221    /* scan the javascript */  static bool characters_are_white_space(const jschar * characters, size_t line_start, size_t line_end) {
1222    JSTokenStream * token_stream = js_NewFileTokenStream(context, NULL, input);    /* XXX - other Unicode space */
1223    if (token_stream == NULL) {    const jschar * end = characters + line_end;
1224      fatal("cannot create token stream from file: %s", file_id);    for (const jschar * p = characters + line_start; p < end; p++) {
1225        jschar c = *p;
1226        if (c == 0x9 || c == 0xB || c == 0xC || c == 0x20 || c == 0xA0) {
1227          continue;
1228        }
1229        else {
1230          return false;
1231        }
1232    }    }
1233      return true;
1234    }
1235    
1236    static void error_reporter(JSContext * context, const char * message, JSErrorReport * report) {
1237      warn_source(file_id, report->lineno, "%s", message);
1238    }
1239    
1240    void jscoverage_instrument_js(const char * id, const uint16_t * characters, size_t num_characters, Stream * output) {
1241      file_id = id;
1242    
1243    /* parse the javascript */    /* parse the javascript */
1244    JSParseNode * node = js_ParseTokenStream(context, global, token_stream);    JSParseContext parse_context;
1245      if (! js_InitParseContext(context, &parse_context, NULL, NULL, characters, num_characters, NULL, NULL, 1)) {
1246        fatal("cannot create token stream from file %s", file_id);
1247      }
1248      JSErrorReporter old_error_reporter = JS_SetErrorReporter(context, error_reporter);
1249      JSParseNode * node = js_ParseScript(context, global, &parse_context);
1250    if (node == NULL) {    if (node == NULL) {
1251      fatal("parse error in file: %s", file_id);      js_ReportUncaughtException(context);
1252        fatal("parse error in file %s", file_id);
1253    }    }
1254    int num_lines = node->pn_pos.end.lineno;    JS_SetErrorReporter(context, old_error_reporter);
1255      num_lines = node->pn_pos.end.lineno;
1256    lines = xmalloc(num_lines);    lines = xmalloc(num_lines);
1257    for (int i = 0; i < num_lines; i++) {    for (unsigned int i = 0; i < num_lines; i++) {
1258      lines[i] = 0;      lines[i] = 0;
1259    }    }
1260    
1261      /* search code for conditionals */
1262      exclusive_directives = xnew(bool, num_lines);
1263      for (unsigned int i = 0; i < num_lines; i++) {
1264        exclusive_directives[i] = false;
1265      }
1266    
1267      bool has_conditionals = false;
1268      struct IfDirective * if_directives = NULL;
1269      size_t line_number = 0;
1270      size_t i = 0;
1271      while (i < num_characters) {
1272        if (line_number == UINT16_MAX) {
1273          fatal("file %s contains more than 65,535 lines", file_id);
1274        }
1275        line_number++;
1276        size_t line_start = i;
1277        jschar c;
1278        bool done = false;
1279        while (! done && i < num_characters) {
1280          c = characters[i];
1281          switch (c) {
1282          case '\r':
1283          case '\n':
1284          case 0x2028:
1285          case 0x2029:
1286            done = true;
1287            break;
1288          default:
1289            i++;
1290          }
1291        }
1292        size_t line_end = i;
1293        if (i < num_characters) {
1294          i++;
1295          if (c == '\r' && i < num_characters && characters[i] == '\n') {
1296            i++;
1297          }
1298        }
1299    
1300        if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_IF")) {
1301          has_conditionals = true;
1302    
1303          if (characters_are_white_space(characters, line_start + 16, line_end)) {
1304            exclusive_directives[line_number - 1] = true;
1305          }
1306          else {
1307            struct IfDirective * if_directive = xnew(struct IfDirective, 1);
1308            if_directive->condition_start = characters + line_start + 16;
1309            if_directive->condition_end = characters + line_end;
1310            if_directive->start_line = line_number;
1311            if_directive->end_line = 0;
1312            if_directive->next = if_directives;
1313            if_directives = if_directive;
1314          }
1315        }
1316        else if (characters_start_with(characters, line_start, line_end, "//#JSCOVERAGE_ENDIF")) {
1317          for (struct IfDirective * p = if_directives; p != NULL; p = p->next) {
1318            if (p->end_line == 0) {
1319              p->end_line = line_number;
1320              break;
1321            }
1322          }
1323        }
1324      }
1325    
1326    /*    /*
1327    Create a temporary file - we can't write directly to the output because we    An instrumented JavaScript file has 4 sections:
1328    need to know the line number info first.    1. initialization
1329      2. instrumented source code
1330      3. conditionals
1331      4. original source code
1332    */    */
   FILE * temporary = tmpfile();  
   if (temporary == NULL) {  
     fatal("cannot create temporary file for script: %s", file_id);  
   }  
1333    
1334    /* write instrumented javascript to the temporary */    Stream * instrumented = Stream_new(0);
1335    instrument_statement(node, temporary, 0);    instrument_statement(node, instrumented, 0, false);
1336      js_FinishParseContext(context, &parse_context);
1337    
1338    /* write line number info to the output */    /* write line number info to the output */
1339    fprintf(output, "/* automatically generated by JSCoverage - do not edit */\n");    Stream_write_string(output, "/* automatically generated by JSCoverage - do not edit */\n");
1340    fprintf(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");    if (jscoverage_mozilla) {
1341    fprintf(output, "var _$jscoverage = top._$jscoverage;\n");      Stream_write_string(output, "try {\n");
1342    fprintf(output, "if (! _$jscoverage['%s']) {\n", file_id);      Stream_write_string(output, "  Components.utils.import('resource://gre/modules/jscoverage.jsm');\n");
1343    fprintf(output, "  _$jscoverage['%s'] = [];\n", file_id);      Stream_printf(output, "  dump('%s: successfully imported jscoverage module\\n');\n", id);
1344        Stream_write_string(output, "}\n");
1345        Stream_write_string(output, "catch (e) {\n");
1346        Stream_write_string(output, "  _$jscoverage = {};\n");
1347        Stream_printf(output, "  dump('%s: failed to import jscoverage module - coverage not available for this file\\n');\n", id);
1348        Stream_write_string(output, "}\n");
1349      }
1350      else {
1351        Stream_write_string(output, "if (! top._$jscoverage) {\n  top._$jscoverage = {};\n}\n");
1352        Stream_write_string(output, "var _$jscoverage = top._$jscoverage;\n");
1353      }
1354      Stream_printf(output, "if (! _$jscoverage['%s']) {\n", file_id);
1355      Stream_printf(output, "  _$jscoverage['%s'] = [];\n", file_id);
1356    for (int i = 0; i < num_lines; i++) {    for (int i = 0; i < num_lines; i++) {
1357      if (lines[i]) {      if (lines[i]) {
1358        fprintf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);        Stream_printf(output, "  _$jscoverage['%s'][%d] = 0;\n", file_id, i + 1);
1359      }      }
1360    }    }
1361    fprintf(output, "}\n");    Stream_write_string(output, "}\n");
1362      free(lines);
1363    lines = NULL;    lines = NULL;
1364      free(exclusive_directives);
1365      exclusive_directives = NULL;
1366    
1367      /* conditionals */
1368      if (has_conditionals) {
1369        Stream_printf(output, "_$jscoverage['%s'].conditionals = [];\n", file_id);
1370      }
1371    
1372      /* copy the instrumented source code to the output */
1373      Stream_write(output, instrumented->data, instrumented->length);
1374    
1375      /* conditionals */
1376      for (struct IfDirective * if_directive = if_directives; if_directive != NULL; if_directive = if_directive->next) {
1377        Stream_write_string(output, "if (!(");
1378        print_javascript(if_directive->condition_start, if_directive->condition_end - if_directive->condition_start, output);
1379        Stream_write_string(output, ")) {\n");
1380        Stream_printf(output, "  _$jscoverage['%s'].conditionals[%d] = %d;\n", file_id, if_directive->start_line, if_directive->end_line);
1381        Stream_write_string(output, "}\n");
1382      }
1383    
1384    /* copy the temporary to the output */    /* free */
1385    fseek(temporary, 0, SEEK_SET);    while (if_directives != NULL) {
1386    copy_stream(temporary, output);      struct IfDirective * if_directive = if_directives;
1387        if_directives = if_directives->next;
1388        free(if_directive);
1389      }
1390    
1391      /* copy the original source to the output */
1392      Stream_printf(output, "_$jscoverage['%s'].source = ", file_id);
1393      jscoverage_write_source(id, characters, num_characters, output);
1394      Stream_printf(output, ";\n");
1395    
1396    fclose(temporary);    Stream_delete(instrumented);
1397    
1398    file_id = NULL;    file_id = NULL;
1399  }  }
1400    
1401  void jscoverage_instrument_js(const char * id, FILE * input, FILE * output) {  void jscoverage_write_source(const char * id, const jschar * characters, size_t num_characters, Stream * output) {
1402    instrument_js_stream(id, 0, input, output);    Stream_write_string(output, "[");
1403      if (jscoverage_highlight) {
1404        Stream * highlighted_stream = Stream_new(num_characters);
1405        jscoverage_highlight_js(context, id, characters, num_characters, highlighted_stream);
1406        size_t i = 0;
1407        while (i < highlighted_stream->length) {
1408          if (i > 0) {
1409            Stream_write_char(output, ',');
1410          }
1411    
1412          Stream_write_char(output, '"');
1413          bool done = false;
1414          while (! done) {
1415            char c = highlighted_stream->data[i];
1416            switch (c) {
1417            case 0x8:
1418              /* backspace */
1419              Stream_write_string(output, "\\b");
1420              break;
1421            case 0x9:
1422              /* horizontal tab */
1423              Stream_write_string(output, "\\t");
1424              break;
1425            case 0xa:
1426              /* line feed (new line) */
1427              done = true;
1428              break;
1429            /* IE doesn't support this */
1430            /*
1431            case 0xb:
1432              Stream_write_string(output, "\\v");
1433              break;
1434            */
1435            case 0xc:
1436              /* form feed */
1437              Stream_write_string(output, "\\f");
1438              break;
1439            case 0xd:
1440              /* carriage return */
1441              done = true;
1442              if (i + 1 < highlighted_stream->length && highlighted_stream->data[i + 1] == '\n') {
1443                i++;
1444              }
1445              break;
1446            case '"':
1447              Stream_write_string(output, "\\\"");
1448              break;
1449            case '\\':
1450              Stream_write_string(output, "\\\\");
1451              break;
1452            default:
1453              Stream_write_char(output, c);
1454              break;
1455            }
1456            i++;
1457            if (i >= highlighted_stream->length) {
1458              done = true;
1459            }
1460          }
1461          Stream_write_char(output, '"');
1462        }
1463        Stream_delete(highlighted_stream);
1464      }
1465      else {
1466        size_t i = 0;
1467        while (i < num_characters) {
1468          if (i > 0) {
1469            Stream_write_char(output, ',');
1470          }
1471    
1472          Stream_write_char(output, '"');
1473          bool done = false;
1474          while (! done) {
1475            jschar c = characters[i];
1476            switch (c) {
1477            case 0x8:
1478              /* backspace */
1479              Stream_write_string(output, "\\b");
1480              break;
1481            case 0x9:
1482              /* horizontal tab */
1483              Stream_write_string(output, "\\t");
1484              break;
1485            case 0xa:
1486              /* line feed (new line) */
1487              done = true;
1488              break;
1489            /* IE doesn't support this */
1490            /*
1491            case 0xb:
1492              Stream_write_string(output, "\\v");
1493              break;
1494            */
1495            case 0xc:
1496              /* form feed */
1497              Stream_write_string(output, "\\f");
1498              break;
1499            case 0xd:
1500              /* carriage return */
1501              done = true;
1502              if (i + 1 < num_characters && characters[i + 1] == '\n') {
1503                i++;
1504              }
1505              break;
1506            case '"':
1507              Stream_write_string(output, "\\\"");
1508              break;
1509            case '\\':
1510              Stream_write_string(output, "\\\\");
1511              break;
1512            case '&':
1513              Stream_write_string(output, "&amp;");
1514              break;
1515            case '<':
1516              Stream_write_string(output, "&lt;");
1517              break;
1518            case '>':
1519              Stream_write_string(output, "&gt;");
1520              break;
1521            case 0x2028:
1522            case 0x2029:
1523              done = true;
1524              break;
1525            default:
1526              if (32 <= c && c <= 126) {
1527                Stream_write_char(output, c);
1528              }
1529              else {
1530                Stream_printf(output, "&#%d;", c);
1531              }
1532              break;
1533            }
1534            i++;
1535            if (i >= num_characters) {
1536              done = true;
1537            }
1538          }
1539          Stream_write_char(output, '"');
1540        }
1541      }
1542      Stream_write_string(output, "]");
1543    }
1544    
1545    void jscoverage_copy_resources(const char * destination_directory) {
1546      copy_resource("jscoverage.html", destination_directory);
1547      copy_resource("jscoverage.css", destination_directory);
1548      copy_resource("jscoverage.js", destination_directory);
1549      copy_resource("jscoverage-ie.css", destination_directory);
1550      copy_resource("jscoverage-throbber.gif", destination_directory);
1551      copy_resource("jscoverage-highlight.css", destination_directory);
1552    }
1553    
1554    /*
1555    coverage reports
1556    */
1557    
1558    struct FileCoverageList {
1559      FileCoverage * file_coverage;
1560      struct FileCoverageList * next;
1561    };
1562    
1563    struct Coverage {
1564      JSHashTable * coverage_table;
1565      struct FileCoverageList * coverage_list;
1566    };
1567    
1568    static int compare_strings(const void * p1, const void * p2) {
1569      return strcmp(p1, p2) == 0;
1570    }
1571    
1572    Coverage * Coverage_new(void) {
1573      Coverage * result = xmalloc(sizeof(Coverage));
1574      result->coverage_table = JS_NewHashTable(1024, JS_HashString, compare_strings, NULL, NULL, NULL);
1575      if (result->coverage_table == NULL) {
1576        fatal("cannot create hash table");
1577      }
1578      result->coverage_list = NULL;
1579      return result;
1580    }
1581    
1582    void Coverage_delete(Coverage * coverage) {
1583      JS_HashTableDestroy(coverage->coverage_table);
1584      struct FileCoverageList * p = coverage->coverage_list;
1585      while (p != NULL) {
1586        free(p->file_coverage->coverage_lines);
1587        if (p->file_coverage->source_lines != NULL) {
1588          for (uint32 i = 0; i < p->file_coverage->num_source_lines; i++) {
1589            free(p->file_coverage->source_lines[i]);
1590          }
1591          free(p->file_coverage->source_lines);
1592        }
1593        free(p->file_coverage->id);
1594        free(p->file_coverage);
1595        struct FileCoverageList * q = p;
1596        p = p->next;
1597        free(q);
1598      }
1599      free(coverage);
1600    }
1601    
1602    struct EnumeratorArg {
1603      CoverageForeachFunction f;
1604      void * p;
1605    };
1606    
1607    static intN enumerator(JSHashEntry * entry, intN i, void * arg) {
1608      struct EnumeratorArg * enumerator_arg = arg;
1609      enumerator_arg->f(entry->value, i, enumerator_arg->p);
1610      return 0;
1611    }
1612    
1613    void Coverage_foreach_file(Coverage * coverage, CoverageForeachFunction f, void * p) {
1614      struct EnumeratorArg enumerator_arg;
1615      enumerator_arg.f = f;
1616      enumerator_arg.p = p;
1617      JS_HashTableEnumerateEntries(coverage->coverage_table, enumerator, &enumerator_arg);
1618    }
1619    
1620    int jscoverage_parse_json(Coverage * coverage, const uint8_t * json, size_t length) {
1621      int result = 0;
1622    
1623      jschar * base = js_InflateString(context, (char *) json, &length);
1624      if (base == NULL) {
1625        fatal("out of memory");
1626      }
1627    
1628      jschar * parenthesized_json = xnew(jschar, addst(length, 2));
1629      parenthesized_json[0] = '(';
1630      memcpy(parenthesized_json + 1, base, mulst(length, sizeof(jschar)));
1631      parenthesized_json[length + 1] = ')';
1632    
1633      JS_free(context, base);
1634    
1635      JSParseContext parse_context;
1636      if (! js_InitParseContext(context, &parse_context, NULL, NULL, parenthesized_json, length + 2, NULL, NULL, 1)) {
1637        free(parenthesized_json);
1638        return -1;
1639      }
1640      JSParseNode * root = js_ParseScript(context, global, &parse_context);
1641      free(parenthesized_json);
1642      if (root == NULL) {
1643        result = -1;
1644        goto done;
1645      }
1646    
1647      /* root node must be TOK_LC */
1648      if (root->pn_type != TOK_LC) {
1649        result = -1;
1650        goto done;
1651      }
1652      JSParseNode * semi = root->pn_u.list.head;
1653    
1654      /* the list must be TOK_SEMI and it must contain only one element */
1655      if (semi->pn_type != TOK_SEMI || semi->pn_next != NULL) {
1656        result = -1;
1657        goto done;
1658      }
1659      JSParseNode * parenthesized = semi->pn_kid;
1660    
1661      /* this must be a parenthesized expression */
1662      if (parenthesized->pn_type != TOK_RP) {
1663        result = -1;
1664        goto done;
1665      }
1666      JSParseNode * object = parenthesized->pn_kid;
1667    
1668      /* this must be an object literal */
1669      if (object->pn_type != TOK_RC) {
1670        result = -1;
1671        goto done;
1672      }
1673    
1674      for (JSParseNode * p = object->pn_head; p != NULL; p = p->pn_next) {
1675        /* every element of this list must be TOK_COLON */
1676        if (p->pn_type != TOK_COLON) {
1677          result = -1;
1678          goto done;
1679        }
1680    
1681        /* the key must be a string representing the file */
1682        JSParseNode * key = p->pn_left;
1683        if (key->pn_type != TOK_STRING || ! ATOM_IS_STRING(key->pn_atom)) {
1684          result = -1;
1685          goto done;
1686        }
1687        char * id_bytes = JS_GetStringBytes(ATOM_TO_STRING(key->pn_atom));
1688    
1689        /* the value must be an object literal OR an array */
1690        JSParseNode * value = p->pn_right;
1691        if (! (value->pn_type == TOK_RC || value->pn_type == TOK_RB)) {
1692          result = -1;
1693          goto done;
1694        }
1695    
1696        JSParseNode * array = NULL;
1697        JSParseNode * source = NULL;
1698        if (value->pn_type == TOK_RB) {
1699          /* an array */
1700          array = value;
1701        }
1702        else if (value->pn_type == TOK_RC) {
1703          /* an object literal */
1704          if (value->pn_count != 2) {
1705            result = -1;
1706            goto done;
1707          }
1708          for (JSParseNode * element = value->pn_head; element != NULL; element = element->pn_next) {
1709            if (element->pn_type != TOK_COLON) {
1710              result = -1;
1711              goto done;
1712            }
1713            JSParseNode * left = element->pn_left;
1714            if (left->pn_type != TOK_STRING || ! ATOM_IS_STRING(left->pn_atom)) {
1715              result = -1;
1716              goto done;
1717            }
1718            const char * s = JS_GetStringBytes(ATOM_TO_STRING(left->pn_atom));
1719            if (strcmp(s, "coverage") == 0) {
1720              array = element->pn_right;
1721              if (array->pn_type != TOK_RB) {
1722                result = -1;
1723                goto done;
1724              }
1725            }
1726            else if (strcmp(s, "source") == 0) {
1727              source = element->pn_right;
1728              if (source->pn_type != TOK_RB) {
1729                result = -1;
1730                goto done;
1731              }
1732            }
1733            else {
1734              result = -1;
1735              goto done;
1736            }
1737          }
1738        }
1739        else {
1740          result = -1;
1741          goto done;
1742        }
1743    
1744        if (array == NULL) {
1745          result = -1;
1746          goto done;
1747        }
1748    
1749        /* look up the file in the coverage table */
1750        FileCoverage * file_coverage = JS_HashTableLookup(coverage->coverage_table, id_bytes);
1751        if (file_coverage == NULL) {
1752          /* not there: create a new one */
1753          char * id = xstrdup(id_bytes);
1754          file_coverage = xmalloc(sizeof(FileCoverage));
1755          file_coverage->id = id;
1756          file_coverage->num_coverage_lines = array->pn_count;
1757          file_coverage->coverage_lines = xnew(int, array->pn_count);
1758          file_coverage->source_lines = NULL;
1759    
1760          /* set coverage for all lines */
1761          uint32 i = 0;
1762          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1763            if (element->pn_type == TOK_NUMBER) {
1764              file_coverage->coverage_lines[i] = (int) element->pn_dval;
1765            }
1766            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1767              file_coverage->coverage_lines[i] = -1;
1768            }
1769            else {
1770              result = -1;
1771              goto done;
1772            }
1773          }
1774          assert(i == array->pn_count);
1775    
1776          /* add to the hash table */
1777          JS_HashTableAdd(coverage->coverage_table, id, file_coverage);
1778          struct FileCoverageList * coverage_list = xmalloc(sizeof(struct FileCoverageList));
1779          coverage_list->file_coverage = file_coverage;
1780          coverage_list->next = coverage->coverage_list;
1781          coverage->coverage_list = coverage_list;
1782        }
1783        else {
1784          /* sanity check */
1785          assert(strcmp(file_coverage->id, id_bytes) == 0);
1786          if (file_coverage->num_coverage_lines != array->pn_count) {
1787            result = -2;
1788            goto done;
1789          }
1790    
1791          /* merge the coverage */
1792          uint32 i = 0;
1793          for (JSParseNode * element = array->pn_head; element != NULL; element = element->pn_next, i++) {
1794            if (element->pn_type == TOK_NUMBER) {
1795              if (file_coverage->coverage_lines[i] == -1) {
1796                result = -2;
1797                goto done;
1798              }
1799              file_coverage->coverage_lines[i] += (int) element->pn_dval;
1800            }
1801            else if (element->pn_type == TOK_PRIMARY && element->pn_op == JSOP_NULL) {
1802              if (file_coverage->coverage_lines[i] != -1) {
1803                result = -2;
1804                goto done;
1805              }
1806            }
1807            else {
1808              result = -1;
1809              goto done;
1810            }
1811          }
1812          assert(i == array->pn_count);
1813        }
1814    
1815        /* if this JSON file has source, use it */
1816        if (file_coverage->source_lines == NULL && source != NULL) {
1817          file_coverage->num_source_lines = source->pn_count;
1818          file_coverage->source_lines = xnew(char *, source->pn_count);
1819          uint32 i = 0;
1820          for (JSParseNode * element = source->pn_head; element != NULL; element = element->pn_next, i++) {
1821            if (element->pn_type != TOK_STRING) {
1822              result = -1;
1823              goto done;
1824            }
1825            file_coverage->source_lines[i] = xstrdup(JS_GetStringBytes(ATOM_TO_STRING(element->pn_atom)));
1826          }
1827          assert(i == source->pn_count);
1828        }
1829      }
1830    
1831    done:
1832      js_FinishParseContext(context, &parse_context);
1833      return result;
1834  }  }
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