1 #define _GNU_SOURCE 2 #include "pthread_impl.h" 3 #include "libc.h" 4 #include <sys/mman.h> 5 pthread_getattr_np(pthread_t t,pthread_attr_t * a)6int pthread_getattr_np(pthread_t t, pthread_attr_t *a) 7 { 8 *a = (pthread_attr_t){0}; 9 a->_a_detach = t->detach_state>=DT_DETACHED; 10 a->_a_guardsize = t->guard_size; 11 // Todo[#I9Q9K6]: We need a proper way to solve the stack setup of the main thread. 12 if (t->stack && t->stack_size) { 13 a->_a_stackaddr = (uintptr_t)t->stack; 14 a->_a_stacksize = t->stack_size; 15 } else { 16 char *p = (void *)libc.auxv; 17 size_t l = PAGE_SIZE; 18 p += -(uintptr_t)p & PAGE_SIZE-1; 19 a->_a_stackaddr = (uintptr_t)p; 20 while (mremap(p-l-PAGE_SIZE, PAGE_SIZE, 2*PAGE_SIZE, 0)==MAP_FAILED && errno==ENOMEM) 21 l += PAGE_SIZE; 22 a->_a_stacksize = l; 23 } 24 return 0; 25 } 26