lily/debug.cc

   1 /*
   2   debug.cc --  implement debugging routines
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1996,98 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include <fstream.h>
  10 #include <signal.h>
  11
  12 // libg++ 2.8.0
  13 // #include <std/new.h>
  14 #include <stdlib.h>
  15
  16
  17 #include "debug.hh"
  18 #include "dstream.hh"
  19 #include "flower-debug.hh"
  20 #include "moment.hh"
  21 #include "misc.hh"
  22 #include "main.hh"
  23
  24 Dstream *my_monitor=0;
  25
  26 void
  27 float_handler (int)
  28 {
  29   cerr << _ ("floating point exception") << endl;
  30   assert (false);
  31 }
  32
  33 void
  34 debug_init()
  35 {
  36   my_monitor = new Dstream (&cout, ".dstreamrc");
  37   signal (SIGFPE, float_handler);
  38 }
  39
  40 bool check_malloc_b = false;
  41
  42 // #define MEMORY_PARANOID
  43
  44 #ifdef MEMORY_PARANOID
  45
  46 #include <malloc.h>
  47
  48 void
  49 frobnify (void *p, size_t s)
  50 {
  51   char *cp = (char*)p;
  52   char *e  = cp + s;
  53   while (cp < e)
  54     {
  55       *cp++ ^=42;
  56     }
  57 }
  58
  59
  60 void *
  61 operator new (size_t size)
  62 {
  63   void *result;
  64   result = malloc (size);
  65   if (check_malloc_b)
  66     frobnify (result, size);
  67   return result;
  68 }
  69
  70 void *to_frob; int frob_size;
  71
  72 void
  73 set_frobnify (void * p, size_t sz)
  74 {
  75   to_frob = p;
  76   frob_size = sz;
  77 }
  78
  79 void
  80 operator delete (void *p)
  81 {
  82   if (!p)
  83     return ;
  84   if (p == to_frob)
  85     {
  86       frobnify (p, frob_size);
  87       to_frob = 0;
  88       frob_size=0;
  89     }
  90
  91   free (p);
  92 }
  93 #endif // MEMORY_PARANOID
  94
  95 void
  96 set_debug (bool b)
  97 {
  98   if (b)
  99     flower_dstream = my_monitor;
 100   else
 101     flower_dstream = 0;
 102
 103 #ifdef MEMORY_PARANOID
 104   if (check_malloc_b)
 105     if (mcheck (0))
 106       warning (_ ("Can't set mem-checking!"));
 107 #endif
 108 }
 109