NEW_THROWS.cpp

Go to the documentation of this file.

// checking if operator new() throws
 
 
#include <stddef.h>
 
#include "config.h"
#include "nodbg.h"
 
#ifndef _RWSTD_NO_SETRLIMIT
// test for setrlimit() presence before compiling current file
#endif   // _RWSTD_NO_SETRLIMIT
 
// proclimits.h must be included only after #if[n]def _RWSTD_NO_SETRLIMIT
#include "proclimits.h"
 
#if 2 == __GNUG__
#  ifndef _RWSTD_NO_HONOR_STD
#    ifdef _RWSTD_NO_STD_TERMINATE
#      include "terminate.h"
#    endif   // _RWSTD_NO_STD_TERMINATE
#  endif   // _RWSTD_NO_HONOR_STD
#endif   // gcc 2.x
 
#ifndef _RWSTD_NO_NEW_OFLOW_SAFE
// test if operator new() checks the argument for overflow
#endif   // _RWSTD_NO_NEW_OFLOW_SAFE
 
 
// 18.4.1.1
// -3- Required behavior: Return a non-null pointer ... or else throw 
// a bad_alloc exception.
 
int main ()
{
    nodbg ();
 
    // decrease resource limit to a minimum to induce a failure
    // without unreasonably stressing the system
    limit_memory (0);
 
    void *p = (void*)1;
 
    try {
        const size_t size = (size_t)1 << (sizeof (size_t) * 8 - 1);
 
        for (int i = 0; i != 256; ++i) {
            // try to allocate a huge amount of memory
            p = ::operator new (size);
            // do not delete
        }
    }
    catch (...) {
        return 0;
    }
 
    return 1;
}