From 14a835b3868e4dccece15acbff6d5da6c0e1ff17 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sun, 31 Mar 2013 23:25:55 -0400 Subject: implement pthread_getattr_np this function is mainly (purely?) for obtaining stack address information, but we also provide the detach state since it's easy to do anyway. --- src/thread/pthread_getattr_np.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 src/thread/pthread_getattr_np.c (limited to '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 index 00000000..945242b7 --- /dev/null +++ b/src/thread/pthread_getattr_np.c @@ -0,0 +1,21 @@ +#include "pthread_impl.h" +#include + +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; +} -- cgit v1.2.1