STD_BAD_ALLOC.cpp

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// checking for class std::bad_alloc
 
 
#include "config.h"
#include "nodbg.h"
 
#if !defined (_RWSTD_NO_NEW_THROWS) && !defined (_RWSTD_NO_NEW_OFLOW_SAFE)
#  include <stddef.h>   // for size_t
#endif   // !_RWSTD_NO_NEW_THROWS && !_RWSTD_NO_NEW_OFLOW_SAFE
 
#ifndef _RWSTD_NO_SETRLIMIT
// test for setrlimit() presence before compiling current file
#endif
 
// proclimits.h must be included only after #if[n]def _RWSTD_NO_SETRLIMIT
#include "proclimits.h"
 
#ifndef _RWSTD_NO_HONOR_STD
#  ifdef _RWSTD_NO_STD_TERMINATE
#    include "terminate.h"
#  endif   // _RWSTD_NO_STD_TERMINATE
#endif   // _RWSTD_NO_HONOR_STD
 
// will fail if namespaces aren't supported
namespace std {
 
struct bad_alloc { };
 
}
 
// force a failure if namespace std isn't honored
enum bad_alloc { };
 
 
int main ()
{
    // prevent MSVC's libc from popping up a dialog box
    // with an out-of-memory message
    nodbg ();
 
    try {
 
#ifndef _RWSTD_NO_NEW_THROWS
#  ifndef _RWSTD_NO_NEW_OFLOW_SAFE
 
        void *p = ::operator new (size_t (-1));
 
        if (!p)
            return 1;
 
#  else   // if defined (_RWSTD_NO_NEW_OFLOW_SAFE)
 
        limit_memory (0);
 
        for (unsigned long n = 1UL << (sizeof (long) * 8 - 1);
             0 != n; n |= (n >> 1)) {
 
            // try to allocate a huge amount of memory
            void *p = ::operator new (n);
 
            if (!p)
                return 1;
        }
 
#  endif   // _RWSTD_NO_NEW_OFLOW_SAFE
#else   // if defined (_RWSTD_NO_NEW_THROWS)
 
        return 4;
 
#endif
 
    }
    catch (std::bad_alloc&) {
        return 0;
    }
    catch (...) {
        return 2;
    }
 
    return 3;
}