| 1 | #include <cstring> |
|---|---|
| 2 | #include <memory> |
| 3 | #include <string> |
| 4 | |
| 5 | int main() { |
| 6 | // Stack |
| 7 | const char stack_pointer[] = "stack_there_is_only_one_of_me"; |
| 8 | |
| 9 | // Heap |
| 10 | // This test relies on std::string objects with size over 22 characters being |
| 11 | // allocated on the heap. |
| 12 | const std::string heap_string1("heap_there_is_exactly_two_of_me"); |
| 13 | const std::string heap_string2("heap_there_is_exactly_two_of_me"); |
| 14 | const char *heap_pointer1 = heap_string1.data(); |
| 15 | const char *heap_pointer2 = heap_string2.data(); |
| 16 | |
| 17 | // Aligned Heap |
| 18 | constexpr char aligned_string[] = "i_am_unaligned_string_on_the_heap"; |
| 19 | constexpr size_t buffer_size = 100; |
| 20 | constexpr size_t len = sizeof(aligned_string) + 1; |
| 21 | // Allocate memory aligned to 8-byte boundary |
| 22 | void *aligned_string_ptr = new size_t[buffer_size]; |
| 23 | if (aligned_string_ptr == nullptr) { |
| 24 | return -1; |
| 25 | } |
| 26 | // Zero out the memory |
| 27 | memset(s: aligned_string_ptr, c: 0, n: buffer_size); |
| 28 | |
| 29 | // Align the pointer to a multiple of 8 bytes |
| 30 | size_t size = buffer_size; |
| 31 | aligned_string_ptr = std::align(align: 8, size: len, ptr&: aligned_string_ptr, space&: size); |
| 32 | |
| 33 | // Copy the string to aligned memory |
| 34 | memcpy(dest: aligned_string_ptr, src: aligned_string, n: len); |
| 35 | |
| 36 | (void)stack_pointer; |
| 37 | (void)heap_pointer1; |
| 38 | (void)heap_pointer2; // break here |
| 39 | return 0; |
| 40 | } |
| 41 |