tools/leaky/bfd.cpp

   1 /* ***** BEGIN LICENSE BLOCK *****
   2  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   3  *
   4  * The contents of this file are subject to the Mozilla Public License Version
   5  * 1.1 (the "License"); you may not use this file except in compliance with
   6  * the License. You may obtain a copy of the License at
   7  * http://www.mozilla.org/MPL/
   8  *
   9  * Software distributed under the License is distributed on an "AS IS" basis,
  10  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  11  * for the specific language governing rights and limitations under the
  12  * License.
  13  *
  14  * The Original Code is mozilla.org code.
  15  *
  16  * The Initial Developer of the Original Code is
  17  * Kipp E.B. Hickman.
  18  * Portions created by the Initial Developer are Copyright (C) 1999
  19  * the Initial Developer. All Rights Reserved.
  20  *
  21  * Contributor(s):
  22  *
  23  * Alternatively, the contents of this file may be used under the terms of
  24  * either the GNU General Public License Version 2 or later (the "GPL"), or
  25  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  26  * in which case the provisions of the GPL or the LGPL are applicable instead
  27  * of those above. If you wish to allow use of your version of this file only
  28  * under the terms of either the GPL or the LGPL, and not to allow others to
  29  * use your version of this file under the terms of the MPL, indicate your
  30  * decision by deleting the provisions above and replace them with the notice
  31  * and other provisions required by the GPL or the LGPL. If you do not delete
  32  * the provisions above, a recipient may use your version of this file under
  33  * the terms of any one of the MPL, the GPL or the LGPL.
  34  *
  35  * ***** END LICENSE BLOCK ***** */
  36
  37 #include "leaky.h"
  38
  39 #ifdef USE_BFD
  40 #include <stdio.h>
  41 #include <string.h>
  42 #include <bfd.h>
  43
  44 extern "C" {
  45   char *cplus_demangle (const char *mangled, int options);
  46 }
  47
  48 void leaky::ReadSymbols(const char *aFileName, u_long aBaseAddress)
  49 {
  50   static bfd_boolean kDynamic = (bfd_boolean) false;
  51
  52   static int firstTime = 1;
  53   if (firstTime) {
  54     firstTime = 0;
  55     bfd_init ();
  56   }
  57
  58   bfd* lib = bfd_openr(aFileName, NULL);
  59   if (NULL == lib) {
  60     return;
  61   }
  62   char **matching;
  63   if (!bfd_check_format_matches(lib, bfd_object, &matching)) {
  64     bfd_close(lib);
  65     return;
  66   }
  67
  68   asymbol* store;
  69   store = bfd_make_empty_symbol(lib);
  70
  71   // read mini symbols
  72   PTR minisyms;
  73   unsigned int size;
  74   long symcount = bfd_read_minisymbols(lib, kDynamic, &minisyms, &size);
  75
  76   int initialSymbols = usefulSymbols;
  77   if (NULL == externalSymbols) {
  78     externalSymbols = (Symbol*) malloc(sizeof(Symbol) * 10000);
  79     numExternalSymbols = 10000;
  80   }
  81   Symbol* sp = externalSymbols + usefulSymbols;
  82   Symbol* lastSymbol = externalSymbols + numExternalSymbols;
  83
  84   // Scan symbols
  85   bfd_byte* from = (bfd_byte *) minisyms;
  86   bfd_byte* fromend = from + symcount * size;
  87   for (; from < fromend; from += size) {
  88     asymbol *sym;
  89     sym = bfd_minisymbol_to_symbol(lib, kDynamic, (const PTR) from, store);
  90
  91     symbol_info syminfo;
  92     bfd_get_symbol_info (lib, sym, &syminfo);
  93
  94 //    if ((syminfo.type == 'T') || (syminfo.type == 't')) {
  95       const char* nm = bfd_asymbol_name(sym);
  96       if (nm && nm[0]) {
  97         char* dnm = NULL;
  98         if (strncmp("__thunk", nm, 7)) {
  99           dnm = cplus_demangle(nm, 1);
 100         }
 101         sp->Init(dnm ? dnm : nm, syminfo.value + aBaseAddress);
 102         sp++;
 103         if (sp >= lastSymbol) {
 104           long n = numExternalSymbols + 10000;
 105           externalSymbols = (Symbol*)
 106             realloc(externalSymbols, (size_t) (sizeof(Symbol) * n));
 107           lastSymbol = externalSymbols + n;
 108           sp = externalSymbols + numExternalSymbols;
 109           numExternalSymbols = n;
 110         }
 111       }
 112 //    }
 113   }
 114
 115
 116   bfd_close(lib);
 117
 118   int interesting = sp - externalSymbols;
 119   if (!quiet) {
 120     printf("%s provided %d symbols\n", aFileName,
 121            interesting - initialSymbols);
 122   }
 123   usefulSymbols = interesting;
 124 }
 125
 126 #endif /* USE_BFD */