pthread_attr_getstack(3C) returns the thread stack address and size set by pthread_attr_setstack().
int pthread_attr_getstack(pthread_attr_t *restrict tattr, void **restrict stackaddr, size_t *restrict stacksize);
#include <pthread.h> pthread_attr_t tattr; void *base; size_t size; int ret; /* getting a stack address and size */ ret = pthread_attr_getstack (&tattr , &base, &size);
pthread_attr_getstack() returns zero after completing successfully. Any other return value indicates that an error occurred. If the following condition occurs, the function fails and returns the corresponding value.
EINVAL
Description: The value of tattr is incorrect.