| // checking if operator new() throws |
| |
| #include "config.h" |
| |
| #include <stdio.h> |
| |
| #ifndef _RWSTD_NO_SETRLIMIT |
| # include <sys/resource.h> // for setrlimit() |
| #endif // _RWSTD_NO_SETRLIMIT |
| |
| |
| #if 2 == __GNUG__ |
| # ifndef _RWSTD_NO_HONOR_STD |
| # ifdef _RWSTD_NO_STD_TERMINATE |
| |
| namespace std { |
| |
| void terminate () |
| { |
| static int *ip; |
| |
| loop: |
| |
| while ((ip [0] = ip [1])) { // force a SIGSEGV |
| ++ip; |
| terminate (); // recurse infinitely |
| } |
| |
| goto loop; |
| } |
| |
| } // namespace std |
| |
| # endif // _RWSTD_NO_STD_TERMINATE |
| # endif // _RWSTD_NO_HONOR_STD |
| #endif // gcc 2.x |
| |
| |
| #if (defined (_WIN32) || defined (_WIN64)) && !defined (__CYGWIN__) |
| |
| # include <crtdbg.h> // for _CrtSetReportMode() |
| |
| void nodbg () |
| { |
| // prevent the Microsoft C library from popping up GUI windows |
| // on various failures and direct error messages to the console |
| // instead |
| _CrtSetReportMode (_CRT_WARN, _CRTDBG_MODE_DEBUG); |
| _CrtSetReportMode (_CRT_ERROR, _CRTDBG_MODE_DEBUG); |
| _CrtSetReportMode (_CRT_ASSERT, _CRTDBG_MODE_DEBUG); |
| } |
| #else |
| |
| void nodbg () { } |
| |
| #endif // _WIN32 || _WIN64 && !__CYGWIN__ |
| |
| |
| // 18.4.1.1 |
| // -3- Required behavior: Return a non-null pointer ... or else throw |
| // a bad_alloc exception. |
| |
| int main () |
| { |
| nodbg (); |
| |
| void *p = 0; |
| |
| try { |
| p = ::operator new (size_t (-1)); |
| } |
| catch (...) { |
| // exit successfully if new threw |
| |
| // this may give a false positive if operaor new() |
| // fails to throw for arguments other than -1 as |
| // happens to be the case with gcc 2.x |
| printf ("// #define _RWSTD_NO_NEW_OFLOW_SAFE\n"); |
| return 0; |
| } |
| |
| // otherwise note that operator new() may have not checked |
| // its argument for overflow and try to coerce it to throw |
| // by passing it a smaller argument |
| printf ("#define _RWSTD_NO_NEW_OFLOW_SAFE\n"); |
| |
| #ifndef _RWSTD_NO_SETRLIMIT |
| |
| // decrease resource limit to a minimum to induce a failure |
| // without unreasonably stressing the system |
| |
| struct rlimit rl = { 0, 0 }; |
| setrlimit (RLIMIT_DATA, &rl); |
| |
| #endif // _RWSTD_NO_SETRLIMIT |
| |
| 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; |
| } |