diff options
| author | Carlos O'Donell <carlos@systemhalted.org> | 2015-08-09 04:17:17 -0400 |
|---|---|---|
| committer | Mike Frysinger <vapier@gentoo.org> | 2016-02-19 12:41:29 -0500 |
| commit | d615a47355699d29df01b28a120cef29c8a38091 (patch) | |
| tree | a60b5cd1dddc6bb30e409601dad08f09a601993b /nptl/pthread_getattr_np.c | |
| parent | 11fca9615fa7b98135d262066db5f4156dd72955 (diff) | |
nptl: support thread stacks that grow up
Gentoo has been carrying this for all arches since 2.17.
URL: http://bugs.gentoo.org/301642
Diffstat (limited to 'nptl/pthread_getattr_np.c')
| -rw-r--r-- | nptl/pthread_getattr_np.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/nptl/pthread_getattr_np.c b/nptl/pthread_getattr_np.c index 8207cdca7b..fb906f0484 100644 --- a/nptl/pthread_getattr_np.c +++ b/nptl/pthread_getattr_np.c @@ -58,7 +58,11 @@ pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr) if (__glibc_likely (thread->stackblock != NULL)) { iattr->stacksize = thread->stackblock_size; +#if _STACK_GROWS_DOWN iattr->stackaddr = (char *) thread->stackblock + iattr->stacksize; +#else + iattr->stackaddr = (char *) thread->stackblock; +#endif } else { @@ -103,7 +107,9 @@ pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr) char *line = NULL; size_t linelen = 0; +#if _STACK_GROWS_DOWN uintptr_t last_to = 0; +#endif while (! feof_unlocked (fp)) { @@ -127,17 +133,24 @@ pthread_getattr_np (pthread_t thread_id, pthread_attr_t *attr) stack extension request. */ iattr->stacksize = (iattr->stacksize & -(intptr_t) GLRO(dl_pagesize)); - +#if _STACK_GROWS_DOWN /* The limit might be too high. */ if ((size_t) iattr->stacksize > (size_t) iattr->stackaddr - last_to) iattr->stacksize = (size_t) iattr->stackaddr - last_to; - +#else + /* The limit might be too high. */ + if ((size_t) iattr->stacksize + > to - (size_t) iattr->stackaddr) + iattr->stacksize = to - (size_t) iattr->stackaddr; +#endif /* We succeed and no need to look further. */ ret = 0; break; } +#if _STACK_GROWS_DOWN last_to = to; +#endif } free (line); |