41 lines · cpp
1#include <cstring>2#include <memory>3#include <string>4 5int main() {6 // Stack7 const char stack_pointer[] = "stack_there_is_only_one_of_me";8 9 // Heap10 // This test relies on std::string objects with size over 22 characters being11 // 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 Heap18 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 boundary22 void *aligned_string_ptr = new size_t[buffer_size];23 if (aligned_string_ptr == nullptr) {24 return -1;25 }26 // Zero out the memory27 memset(aligned_string_ptr, 0, buffer_size);28 29 // Align the pointer to a multiple of 8 bytes30 size_t size = buffer_size;31 aligned_string_ptr = std::align(8, len, aligned_string_ptr, size);32 33 // Copy the string to aligned memory34 memcpy(aligned_string_ptr, aligned_string, len);35 36 (void)stack_pointer;37 (void)heap_pointer1;38 (void)heap_pointer2; // break here39 return 0;40}41