Debugging Memory Errors with Custom Allocators
By Cristian Vlasceanu, April 01, 2002
Allocators may be weird, but it's a Good Weird. With a little help from your operating system, they can even find memory access errors.
April 2002/Debugging Memory Errors with Custom Allocators/Listing 5
namespace STLMemDebug
{
void* allocate(size_t size)
{
void *pv = 0;
#if defined(WIN32)
pv = ::VirtualAlloc(0, size, MEM_COMMIT, PAGE_READWRITE);
#elif defined(UNIX)
// allocate memory aligned to a page boundary
pv = ::pvalloc(size);
#endif // UNIX
if (pv == 0)
{
throw std::bad_alloc(); // pvalloc failed
}
return pv;
}
void deallocate(void* ptr, size_t size) throw()
{
#if defined(WIN32)
::VirtualFree(ptr, size, MEM_DECOMMIT);
#elif defined(UNIX)
::free(ptr);
#endif // UNIX
}
} // namespace STLMemDebug
— End of Listing —
