implement pthread_getattr_np

[musl] / src / thread / pthread_getattr_np.c

diff --git a/src/thread/pthread_getattr_np.c b/src/thread/pthread_getattr_np.c
new file mode 100644 (file)
index 0000000..945242b
--- /dev/null
+++ b/src/thread/pthread_getattr_np.c
@@ -0,0 +1,21 @@
+#include "pthread_impl.h"
+#include <sys/mman.h>
+
+int pthread_getattr_np(pthread_t t, pthread_attr_t *a)
+{
+       *a = (pthread_attr_t){0};
+       a->_a_detach = !!t->detached;
+       if (t->stack) {
+               a->_a_stackaddr = (uintptr_t)t->stack;
+               a->_a_stacksize = t->stack_size - DEFAULT_STACK_SIZE;
+       } else {
+               char *p = (void *)libc.auxv;
+               size_t l = PAGE_SIZE;
+               p += -(uintptr_t)p & PAGE_SIZE-1;
+               a->_a_stackaddr = (uintptr_t)p;
+               while (!posix_madvise(p-l-PAGE_SIZE, PAGE_SIZE, POSIX_MADV_NORMAL))
+                       l += PAGE_SIZE;
+               a->_a_stacksize = l - DEFAULT_STACK_SIZE;
+       }
+       return 0;
+}