gprof/sym_ids.c

   1 #include <ctype.h>
   2
   3 #include "libiberty.h"
   4 #include "cg_arcs.h"
   5 #include "sym_ids.h"
   6
   7 struct sym_id
   8   {
   9     struct sym_id *next;
  10     char *spec;                 /* parsing modifies this */
  11     Table_Id which_table;
  12     bool has_right;
  13     struct match
  14       {
  15         int prev_index;         /* index of prev match */
  16         Sym *prev_match;        /* previous match */
  17         Sym *first_match;       /* chain of all matches */
  18         Sym sym;
  19       }
  20     left, right;
  21   }
  22  *id_list;
  23
  24 Sym_Table syms[NUM_TABLES];
  25
  26 #ifdef DEBUG
  27 const char *table_name[] =
  28 {
  29   "INCL_GRAPH", "EXCL_GRAPH",
  30   "INCL_ARCS", "EXCL_ARCS",
  31   "INCL_FLAT", "EXCL_FLAT",
  32   "INCL_TIME", "EXCL_TIME",
  33   "INCL_ANNO", "EXCL_ANNO",
  34   "INCL_EXEC", "EXCL_EXEC"
  35 };
  36 #endif /* DEBUG */
  37
  38 /*
  39  * This is the table in which we keep all the syms that match
  40  * the right half of an arc id.  It is NOT sorted according
  41  * to the addresses, because it is accessed only through
  42  * the left half's CHILDREN pointers (so it's crucial not
  43  * to reorder this table once pointers into it exist).
  44  */
  45 static Sym_Table right_ids;
  46
  47 static Source_File non_existent_file =
  48 {
  49   0, "<non-existent-file>"
  50 };
  51
  52
  53 void
  54 DEFUN (sym_id_add, (spec, which_table),
  55        const char *spec AND Table_Id which_table)
  56 {
  57   struct sym_id *id;
  58   int len = strlen (spec);
  59
  60   id = (struct sym_id *) xmalloc (sizeof (*id) + len + 1);
  61   memset (id, 0, sizeof (*id));
  62
  63   id->spec = (char *) id + sizeof (*id);
  64   strcpy (id->spec, spec);
  65   id->which_table = which_table;
  66
  67   id->next = id_list;
  68   id_list = id;
  69 }
  70
  71
  72 /*
  73  * A spec has the syntax FILENAME:(FUNCNAME|LINENUM).  As a convenience
  74  * to the user, a spec without a colon is interpreted as:
  75  *
  76  *      (i)   a FILENAME if it contains a dot
  77  *      (ii)  a FUNCNAME if it starts with a non-digit character
  78  *      (iii) a LINENUM if it starts with a digit
  79  *
  80  * A FUNCNAME containing a dot can be specified by :FUNCNAME, a
  81  * FILENAME not containing a dot can be specified by FILENAME:.
  82  */
  83 static void
  84 DEFUN (parse_spec, (spec, sym), char *spec AND Sym * sym)
  85 {
  86   char *colon;
  87
  88   sym_init (sym);
  89   colon = strrchr (spec, ':');
  90   if (colon)
  91     {
  92       *colon = '\0';
  93       if (colon > spec)
  94         {
  95           sym->file = source_file_lookup_name (spec);
  96           if (!sym->file)
  97             {
  98               sym->file = &non_existent_file;
  99             }
 100         }
 101       spec = colon + 1;
 102       if (strlen (spec))
 103         {
 104           if (isdigit ((unsigned char) spec[0]))
 105             {
 106               sym->line_num = atoi (spec);
 107             }
 108           else
 109             {
 110               sym->name = spec;
 111             }
 112         }
 113     }
 114   else if (strlen (spec))
 115     {
 116       /* no colon: spec is a filename if it contains a dot: */
 117       if (strchr (spec, '.'))
 118         {
 119           sym->file = source_file_lookup_name (spec);
 120           if (!sym->file)
 121             {
 122               sym->file = &non_existent_file;
 123             }
 124         }
 125       else if (isdigit ((unsigned char) *spec))
 126         {
 127           sym->line_num = atoi (spec);
 128         }
 129       else if (strlen (spec))
 130         {
 131           sym->name = spec;
 132         }
 133     }
 134 }
 135
 136
 137 /*
 138  * A symbol id has the syntax SPEC[/SPEC], where SPEC is is defined
 139  * by parse_spec().
 140  */
 141 static void
 142 DEFUN (parse_id, (id), struct sym_id *id)
 143 {
 144   char *slash;
 145
 146   DBG (IDDEBUG, printf ("[parse_id] %s -> ", id->spec));
 147
 148   slash = strchr (id->spec, '/');
 149   if (slash)
 150     {
 151       parse_spec (slash + 1, &id->right.sym);
 152       *slash = '\0';
 153       id->has_right = TRUE;
 154     }
 155   parse_spec (id->spec, &id->left.sym);
 156
 157 #ifdef DEBUG
 158   if (debug_level & IDDEBUG)
 159     {
 160       printf ("%s:", id->left.sym.file ? id->left.sym.file->name : "*");
 161       if (id->left.sym.name)
 162         {
 163           printf ("%s", id->left.sym.name);
 164         }
 165       else if (id->left.sym.line_num)
 166         {
 167           printf ("%d", id->left.sym.line_num);
 168         }
 169       else
 170         {
 171           printf ("*");
 172         }
 173       if (id->has_right)
 174         {
 175           printf ("/%s:",
 176                   id->right.sym.file ? id->right.sym.file->name : "*");
 177           if (id->right.sym.name)
 178             {
 179               printf ("%s", id->right.sym.name);
 180             }
 181           else if (id->right.sym.line_num)
 182             {
 183               printf ("%d", id->right.sym.line_num);
 184             }
 185           else
 186             {
 187               printf ("*");
 188             }
 189         }
 190       printf ("\n");
 191     }
 192 #endif
 193 }
 194
 195
 196 /*
 197  * Return TRUE iff PATTERN matches SYM.
 198  */
 199 static bool
 200 DEFUN (match, (pattern, sym), Sym * pattern AND Sym * sym)
 201 {
 202   return (pattern->file ? pattern->file == sym->file : TRUE)
 203     && (pattern->line_num ? pattern->line_num == sym->line_num : TRUE)
 204     && (pattern->name ? strcmp (pattern->name, sym->name) == 0 : TRUE);
 205 }
 206
 207
 208 static void
 209 DEFUN (extend_match, (m, sym, tab, second_pass),
 210      struct match *m AND Sym * sym AND Sym_Table * tab AND bool second_pass)
 211 {
 212   if (m->prev_match != sym - 1)
 213     {
 214       /* discontinuity: add new match to table: */
 215       if (second_pass)
 216         {
 217           tab->base[tab->len] = *sym;
 218           m->prev_index = tab->len;
 219
 220           /* link match into match's chain: */
 221           tab->base[tab->len].next = m->first_match;
 222           m->first_match = &tab->base[tab->len];
 223         }
 224       ++tab->len;
 225     }
 226
 227   /* extend match to include this symbol: */
 228   if (second_pass)
 229     {
 230       tab->base[m->prev_index].end_addr = sym->end_addr;
 231     }
 232   m->prev_match = sym;
 233 }
 234
 235
 236 /*
 237  * Go through sym_id list produced by option processing and fill
 238  * in the various symbol tables indicating what symbols should
 239  * be displayed or suppressed for the various kinds of outputs.
 240  *
 241  * This can potentially produce huge tables and in particulars
 242  * tons of arcs, but this happens only if the user makes silly
 243  * requests---you get what you ask for!
 244  */
 245 void
 246 DEFUN_VOID (sym_id_parse)
 247 {
 248   Sym *sym, *left, *right;
 249   struct sym_id *id;
 250   Sym_Table *tab;
 251
 252   /*
 253    * Convert symbol ids into Syms, so we can deal with them more easily:
 254    */
 255   for (id = id_list; id; id = id->next)
 256     {
 257       parse_id (id);
 258     }
 259
 260   /* first determine size of each table: */
 261
 262   for (sym = symtab.base; sym < symtab.limit; ++sym)
 263     {
 264       for (id = id_list; id; id = id->next)
 265         {
 266           if (match (&id->left.sym, sym))
 267             {
 268               extend_match (&id->left, sym, &syms[id->which_table], FALSE);
 269             }
 270           if (id->has_right && match (&id->right.sym, sym))
 271             {
 272               extend_match (&id->right, sym, &right_ids, FALSE);
 273             }
 274         }
 275     }
 276
 277   /* create tables of appropriate size and reset lengths: */
 278
 279   for (tab = syms; tab < &syms[NUM_TABLES]; ++tab)
 280     {
 281       if (tab->len)
 282         {
 283           tab->base = (Sym *) xmalloc (tab->len * sizeof (Sym));
 284           tab->limit = tab->base + tab->len;
 285           tab->len = 0;
 286         }
 287     }
 288   if (right_ids.len)
 289     {
 290       right_ids.base = (Sym *) xmalloc (right_ids.len * sizeof (Sym));
 291       right_ids.limit = right_ids.base + right_ids.len;
 292       right_ids.len = 0;
 293     }
 294
 295   /* make a second pass through symtab, creating syms as necessary: */
 296
 297   for (sym = symtab.base; sym < symtab.limit; ++sym)
 298     {
 299       for (id = id_list; id; id = id->next)
 300         {
 301           if (match (&id->left.sym, sym))
 302             {
 303               extend_match (&id->left, sym, &syms[id->which_table], TRUE);
 304             }
 305           if (id->has_right && match (&id->right.sym, sym))
 306             {
 307               extend_match (&id->right, sym, &right_ids, TRUE);
 308             }
 309         }
 310     }
 311
 312   /* go through ids creating arcs as needed: */
 313
 314   for (id = id_list; id; id = id->next)
 315     {
 316       if (id->has_right)
 317         {
 318           for (left = id->left.first_match; left; left = left->next)
 319             {
 320               for (right = id->right.first_match; right; right = right->next)
 321                 {
 322                   DBG (IDDEBUG,
 323                        printf (
 324                                 "[sym_id_parse]: arc %s:%s(%lx-%lx) -> %s:%s(%lx-%lx) to %s\n",
 325                                 left->file ? left->file->name : "*",
 326                                 left->name ? left->name : "*", left->addr,
 327                                 left->end_addr,
 328                                 right->file ? right->file->name : "*",
 329                                 right->name ? right->name : "*", right->addr,
 330                                 right->end_addr,
 331                                 table_name[id->which_table]));
 332                   arc_add (left, right, (unsigned long) 0);
 333                 }
 334             }
 335         }
 336     }
 337
 338   /* finally, we can sort the tables and we're done: */
 339
 340   for (tab = &syms[0]; tab < &syms[NUM_TABLES]; ++tab)
 341     {
 342       DBG (IDDEBUG, printf ("[sym_id_parse] syms[%s]:\n",
 343                             table_name[tab - &syms[0]]));
 344       symtab_finalize (tab);
 345     }
 346 }
 347
 348
 349 /*
 350  * Symbol tables storing the FROM symbols of arcs do not necessarily
 351  * have distinct address ranges.  For example, somebody might request
 352  * -k /_mcount to suppress any arcs into _mcount, while at the same
 353  * time requesting -k a/b.  Fortunately, those symbol tables don't get
 354  * very big (the user has to type them!), so a linear search is probably
 355  * tolerable.
 356  */
 357 bool
 358 DEFUN (sym_id_arc_is_present, (symtab, from, to),
 359        Sym_Table * symtab AND Sym * from AND Sym * to)
 360 {
 361   Sym *sym;
 362
 363   for (sym = symtab->base; sym < symtab->limit; ++sym)
 364     {
 365       if (from->addr >= sym->addr && from->addr <= sym->end_addr
 366           && arc_lookup (sym, to))
 367         {
 368           return TRUE;
 369         }
 370     }
 371   return FALSE;
 372 }