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#define _GNU_SOURCE
#include "pthread_impl.h"
#include "libc.h"
#ifdef __wasilibc_unmodified_upstream
#include <sys/mman.h>
#endif
int pthread_getattr_np(pthread_t t, pthread_attr_t *a)
{
*a = (pthread_attr_t){0};
a->_a_detach = t->detach_state>=DT_DETACHED;
a->_a_guardsize = t->guard_size;
if (t->stack) {
a->_a_stackaddr = (uintptr_t)t->stack;
a->_a_stacksize = t->stack_size;
} else {
#ifdef __wasilibc_unmodified_upstream
char *p = (void *)libc.auxv;
size_t l = PAGE_SIZE;
p += -(uintptr_t)p & PAGE_SIZE-1;
a->_a_stackaddr = (uintptr_t)p;
while (mremap(p-l-PAGE_SIZE, PAGE_SIZE, 2*PAGE_SIZE, 0)==MAP_FAILED && errno==ENOMEM)
l += PAGE_SIZE;
a->_a_stacksize = l;
#else
return ENOSYS;
#endif
}
return 0;
}
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