1 // RUN: %clangxx_scudo -std=c++1z -faligned-allocation %s -o %t
2 // RUN: %run %t valid 2>&1
3 // RUN: %env_scudo_opts=allocator_may_return_null=1 %run %t invalid 2>&1
4 // RUN: %env_scudo_opts=allocator_may_return_null=0 not %run %t invalid 2>&1 | FileCheck %s
5
6 // Tests that the C++17 aligned new/delete operators are working as expected.
7 // Currently we do not check the consistency of the alignment on deallocation,
8 // so this just tests that the APIs work.
9
10 #include <assert.h>
11 #include <stdint.h>
12 #include <stdio.h>
13 #include <string.h>
14
15 // Define all new/delete to not depend on the version provided by the platform.
16
17 namespace std {
18 struct nothrow_t {};
19 static const nothrow_t nothrow;
20 enum class align_val_t : size_t {};
21 } // namespace std
22
23 void *operator new(size_t);
24 void *operator new[](size_t);
25 void *operator new(size_t, std::nothrow_t const &);
26 void *operator new[](size_t, std::nothrow_t const &);
27 void *operator new(size_t, std::align_val_t);
28 void *operator new[](size_t, std::align_val_t);
29 void *operator new(size_t, std::align_val_t, std::nothrow_t const &);
30 void *operator new[](size_t, std::align_val_t, std::nothrow_t const &);
31
32 void operator delete(void *) throw();
33 void operator delete[](void *) throw();
34 void operator delete(void *, std::nothrow_t const &);
35 void operator delete[](void *, std::nothrow_t const &);
36 void operator delete(void *, size_t) throw();
37 void operator delete[](void *, size_t) throw();
38 void operator delete(void *, std::align_val_t) throw();
39 void operator delete[](void *, std::align_val_t) throw();
40 void operator delete(void *, std::align_val_t, std::nothrow_t const &);
41 void operator delete[](void *, std::align_val_t, std::nothrow_t const &);
42 void operator delete(void *, size_t, std::align_val_t) throw();
43 void operator delete[](void *, size_t, std::align_val_t) throw();
44
45 template <typename T>
break_optimization(T * arg)46 inline T *break_optimization(T *arg) {
47 __asm__ __volatile__(""
48 :
49 : "r"(arg)
50 : "memory");
51 return arg;
52 }
53
54 struct S12 {
55 int a, b, c;
56 };
57 struct alignas(128) S12_128 {
58 int a, b, c;
59 };
60 struct alignas(256) S12_256 {
61 int a, b, c;
62 };
63 struct alignas(512) S1024_512 {
64 char a[1024];
65 };
66 struct alignas(1024) S1024_1024 {
67 char a[1024];
68 };
69
main(int argc,char ** argv)70 int main(int argc, char **argv) {
71 assert(argc == 2);
72
73 if (!strcmp(argv[1], "valid")) {
74 // Standard use case.
75 delete break_optimization(new S12);
76 delete break_optimization(new S12_128);
77 delete[] break_optimization(new S12_128[4]);
78 delete break_optimization(new S12_256);
79 delete break_optimization(new S1024_512);
80 delete[] break_optimization(new S1024_512[4]);
81 delete break_optimization(new S1024_1024);
82
83 // Call directly the aligned versions of the operators.
84 const size_t alignment = 1U << 8;
85 void *p = operator new(1, static_cast<std::align_val_t>(alignment));
86 assert((reinterpret_cast<uintptr_t>(p) & (alignment - 1)) == 0);
87 operator delete(p, static_cast<std::align_val_t>(alignment));
88 }
89 if (!strcmp(argv[1], "invalid")) {
90 // Alignment must be a power of 2.
91 const size_t alignment = (1U << 8) - 1;
92 void *p = operator new(1, static_cast<std::align_val_t>(alignment),
93 std::nothrow);
94 // CHECK: Scudo ERROR: invalid allocation alignment
95 assert(!p);
96 }
97
98 return 0;
99 }
100