| 1 | #define _GNU_SOURCE |
| 2 | #include "pthread_impl.h" |
| 3 | #include "libc.h" |
| 4 | #include <sys/mman.h> |
| 5 | |
| 6 | int 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 | if (t->stack) { |
| 12 | a->_a_stackaddr = (uintptr_t)t->stack; |
| 13 | a->_a_stacksize = t->stack_size; |
| 14 | } else { |
| 15 | char *p = (void *)libc.auxv; |
| 16 | size_t l = PAGE_SIZE; |
| 17 | p += -(uintptr_t)p & PAGE_SIZE-1; |
| 18 | a->_a_stackaddr = (uintptr_t)p; |
| 19 | while (mremap(p-l-PAGE_SIZE, PAGE_SIZE, 2*PAGE_SIZE, 0)==MAP_FAILED && errno==ENOMEM) |
| 20 | l += PAGE_SIZE; |
| 21 | a->_a_stacksize = l; |
| 22 | } |
| 23 | return 0; |
| 24 | } |