gprof/symtab.h

   1 /* symtab.h
   2
   3    Copyright 2000, 2001 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Binutils.
   6
   7 This program is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2 of the License, or
  10 (at your option) any later version.
  11
  12 This program is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with this program; if not, write to the Free Software
  19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  20 \f
  21 #ifndef symtab_h
  22 #define symtab_h
  23
  24 #include "bfd.h"
  25 #include "gprof.h"
  26
  27 /* For a profile to be intelligible to a human user, it is necessary
  28    to map code-addresses into source-code information.  Source-code
  29    information can be any combination of: (i) function-name, (ii)
  30    source file-name, and (iii) source line number.
  31
  32    The symbol table is used to map addresses into source-code
  33    information.  */
  34
  35 #include "source.h"
  36
  37 #define NBBS 10
  38
  39 /* Symbol-entry.  For each external in the specified file we gather
  40    its address, the number of calls and compute its share of cpu time.  */
  41 typedef struct sym
  42   {
  43     /* Common information:
  44
  45        In the symbol-table, fields ADDR and FUNC_NAME are guaranteed
  46        to contain valid information.  FILE may be 0, if unknown and
  47        LINE_NUM maybe 0 if unknown.  */
  48
  49     bfd_vma addr;               /* Address of entry point.  */
  50     bfd_vma end_addr;           /* End-address.  */
  51     const char *name;           /* Name of function this sym is from.  */
  52     Source_File *file;          /* Source file symbol comes from.  */
  53     int line_num;               /* Source line number.  */
  54     unsigned int                /* Boolean fields:  */
  55       is_func:1,                /*  Is this a function entry point?  */
  56       is_static:1,              /*  Is this a local (static) symbol?  */
  57       is_bb_head:1,             /*  Is this the head of a basic-blk?  */
  58       mapped:1,                 /*  This symbol was mapped to another name.  */
  59       has_been_placed:1;        /*  Have we placed this symbol?  */
  60     unsigned long ncalls;       /* How many times executed  */
  61     int nuses;                  /* How many times this symbol appears in
  62                                    a particular context.  */
  63     bfd_vma bb_addr[NBBS];      /* Address of basic-block start.  */
  64     unsigned long bb_calls[NBBS];/* How many times basic-block was called.  */
  65     struct sym *next;           /* For building chains of syms.  */
  66     struct sym *prev;           /* For building chains of syms.  */
  67
  68     /* Profile specific information:  */
  69
  70     /* Histogram specific information:  */
  71     struct
  72       {
  73         double time;            /* (Weighted) ticks in this routine.  */
  74         bfd_vma scaled_addr;    /* Scaled entry point.  */
  75       }
  76     hist;
  77
  78     /* Call-graph specific information:  */
  79     struct
  80       {
  81         unsigned long self_calls; /* How many calls to self.  */
  82         double child_time;      /* Cumulative ticks in children.  */
  83         int index;              /* Index in the graph list.  */
  84         int top_order;          /* Graph call chain top-sort order.  */
  85         bool print_flag;        /* Should this be printed?  */
  86         struct
  87           {
  88             double fract;       /* What % of time propagates.  */
  89             double self;        /* How much self time propagates.  */
  90             double child;       /* How much child time propagates.  */
  91           }
  92         prop;
  93         struct
  94           {
  95             int num;            /* Internal number of cycle on.  */
  96             struct sym *head;   /* Head of cycle.  */
  97             struct sym *next;   /* Next member of cycle.  */
  98           }
  99         cyc;
 100         struct arc *parents;    /* List of caller arcs.  */
 101         struct arc *children;   /* List of callee arcs.  */
 102       }
 103     cg;
 104   }
 105 Sym;
 106
 107 /* Symbol-tables are always assumed to be sorted
 108    in increasing order of addresses.  */
 109 typedef struct
 110   {
 111     unsigned int len;           /* # of symbols in this table.  */
 112     Sym *base;                  /* First element in symbol table.  */
 113     Sym *limit;                 /* Limit = base + len.  */
 114   }
 115 Sym_Table;
 116
 117 extern Sym_Table symtab;        /* The symbol table.  */
 118
 119 extern void sym_init        PARAMS ((Sym *));
 120 extern void symtab_finalize PARAMS ((Sym_Table *));
 121 extern Sym *sym_lookup      PARAMS ((Sym_Table *, bfd_vma));
 122 extern void find_call       PARAMS ((Sym *, bfd_vma, bfd_vma));
 123
 124 #endif /* symtab_h */