1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // test nothrow sized operator delete replacement. 11 12 // Note that sized delete operator definitions below are simply ignored 13 // when sized deallocation is not supported, e.g., prior to C++14. 14 15 // UNSUPPORTED: asan, msan 16 17 #include <new> 18 #include <cstddef> 19 #include <cstdlib> 20 #include <cassert> 21 #include <limits> 22 23 int unsized_delete_called = 0; 24 int unsized_delete_nothrow_called = 0; 25 int sized_delete_called = 0; 26 int sized_delete_nothrow_called = 0; 27 28 void operator delete(void* p) throw() 29 { 30 ++unsized_delete_called; 31 std::free(p); 32 } 33 34 void operator delete(void* p, const std::nothrow_t&) throw() 35 { 36 ++unsized_delete_nothrow_called; 37 std::free(p); 38 } 39 40 void operator delete(void* p, std::size_t) throw() 41 { 42 ++sized_delete_called; 43 std::free(p); 44 } 45 46 void operator delete(void* p, std::size_t, const std::nothrow_t&) throw() 47 { 48 ++sized_delete_nothrow_called; 49 std::free(p); 50 } 51 52 int new_handler_called = 0; 53 54 void new_handler() 55 { 56 ++new_handler_called; 57 std::set_new_handler(0); 58 } 59 60 bool A_constructed = false; 61 62 struct A 63 { 64 A() {A_constructed = true;} 65 ~A() {A_constructed = false;} 66 }; 67 68 struct BadA : public A { 69 BadA() { throw std::bad_alloc(); } 70 }; 71 72 int main() 73 { 74 std::set_new_handler(new_handler); 75 try 76 { 77 void*volatile vp = operator new (std::numeric_limits<std::size_t>::max(), std::nothrow); 78 assert(new_handler_called == 1); 79 assert(vp == 0); 80 } 81 catch (...) 82 { 83 assert(false); 84 } 85 try 86 { 87 A* ap = new(std::nothrow) BadA; 88 assert(false); 89 } 90 catch (...) 91 { 92 assert(!A_constructed); 93 #if _LIBCPP_STD_VER >= 14 94 // FIXME: Do we need a version of [Expr.Delete]#10 for nothrow 95 // deallocation functions (selecting sized ones whenever available)? 96 // It is not required by the standard. If it were, the following would 97 // be the expected behaviour (instead of the current one): 98 // assert(!unsized_delete_nothrow_called); 99 // assert(sized_delete_nothrow_called == 1); 100 assert(unsized_delete_nothrow_called == 1); 101 assert(!sized_delete_nothrow_called); 102 #else // if _LIBCPP_STD_VER < 14 103 assert(unsized_delete_nothrow_called == 1); 104 assert(!sized_delete_nothrow_called); 105 #endif 106 assert(!unsized_delete_called); 107 assert(!sized_delete_called); 108 } 109 } 110
