手动内存管理

你自己实现堆内存分配和释放。

稍有不慎，这可能会导致崩溃、bug、安全漏洞和内存泄漏。

C++ 示例

你必须对使用 malloc 分配的每个指针调用 free：

void foo(size_t n) {
    int* int_array = malloc(n * sizeof(int));
    //
    // ... lots of code
    //
    free(int_array);
}

Memory is leaked if the function returns early between malloc and free: the pointer is lost and we cannot deallocate the memory. Worse, freeing the pointer twice, or accessing a freed pointer can lead to exploitable security vulnerabilities.