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- the constructors for BX_MEM_C did not always init vector and actual_vector 

to NULL.  If actual_vector points to junk when alloc_vector_aligned
  is called, it will try to free the junk, leading to memory corruption
  or crashes.
This commit is contained in:
Bryce Denney 2002-09-18 05:28:55 +00:00
parent 15a3cbc35f
commit 4e091e37ea
1 changed files with 5 additions and 3 deletions
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8
bochs/memory/misc_mem.cc
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@ -1,5 +1,5 @@
/////////////////////////////////////////////////////////////////////////
// $Id: misc_mem.cc,v 1.28 2002-09-04 02:11:33 bdenney Exp $
// $Id: misc_mem.cc,v 1.29 2002-09-18 05:28:55 bdenney Exp $
/////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2002 MandrakeSoft S.A.
@ -54,6 +54,7 @@ BX_MEM_C::BX_MEM_C(void)
settype(MEMLOG);
vector = NULL;
actual_vector = NULL;
len = 0;
megabytes = 0;
}
@ -90,7 +91,8 @@ BX_MEM_C::alloc_vector_aligned (size_t bytes, size_t alignment)
// BX_MEM_C constructor
BX_MEM_C::BX_MEM_C(size_t memsize)
{
// Alloc 8 extra bytes so that the realignment operation is safe.
vector = NULL;
actual_vector = NULL;
alloc_vector_aligned (memsize, BX_MEM_VECTOR_ALIGN);
len = memsize;
megabytes = len / (1024*1024);
@ -118,7 +120,7 @@ BX_MEM_C::~BX_MEM_C(void)
void
BX_MEM_C::init_memory(int memsize)
{
BX_DEBUG(("Init $Id: misc_mem.cc,v 1.28 2002-09-04 02:11:33 bdenney Exp $"));
BX_DEBUG(("Init $Id: misc_mem.cc,v 1.29 2002-09-18 05:28:55 bdenney Exp $"));
// you can pass 0 if memory has been allocated already through
// the constructor, or the desired size of memory if it hasn't