什么时候c ++分配/解除分配字符串文字

Question

When is the string literal "hello" allocated and deallocated during the lifetime of the program in this example?

init(char **s)
{ 
  *s = "hello";
}
int f()
{
  char *s = 0;
  init(&s);
  printf("%s\n", s);
  return 0;
}

Answer 1

The string literal is initialised into read-only memory segment by the compiler. There is no initialisation or removal done at run-time.

Answer 2

它们未分配，而是存储在可执行文件的DATA段中。

Answer 3

Assuming there is an operating system, the memory containing the string literal is allocated when the OS loads the executable and deallocated when the OS unloads the executable. Exactly when this happens depends on the type of executable (program, shared library, etc.) and the OS.