How does the constructor and destructor attribute work?

How does the constructor and destructor attribute work?

So, the way the constructors and destructors work is that the shared object file contains special sections (.ctors and .dtors on ELF) which contain references to the functions marked with the constructor and destructor attributes, respectively.

When to use _ attribute ( ( destructor ) ) in Java?

1. __attribute__((constructor)) runs when a shared library is loaded, typically during program startup. 2. __attribute__((destructor)) runs when the shared library is unloaded, typically at program exit.

What does the destructor attribute do in GCC?

destructor (priority) The constructor attribute causes the function to be called automatically before execution enters main (). Similarly, the destructor attribute causes the function to be called automatically after main () has completed or exit () has been called.

How does the constructor and destructor work in Elf?

The destructor runs when the shared library is unloaded, typically at program exit. So, the way the constructors and destructors work is that the shared object file contains special sections (.ctors and .dtors on ELF) which contain references to the functions marked with the constructor and destructor attributes, respectively.

When does _ attribute ( ( constructor ) ) run?

1. __attribute__ ( (constructor)) runs when a shared library is loaded, typically during program startup. 2. __attribute__ ( (destructor)) runs when the shared library is unloaded, typically at program exit. 3. The two parentheses are presumably to distinguish them from function calls.

When to use constructor and destructor attributes in Java?

The use of constructor and destructor attributes allow you to additionally assign a priority to the constructor/destructor to control its order of execution before main () is called or after it returns.

destructor (priority) The constructor attribute causes the function to be called automatically before execution enters main (). Similarly, the destructor attribute causes the function to be called automatically after main () has completed or exit () has been called.

When to use the constructor with priority attribute?

A constructor with a low integer value runs before a constructor with a high integer value. A constructor with a priority runs before a constructor without a priority. Priority values up to and including 100 are reserved for internal use. You can use this attribute for start-up or initialization code.