- From: Cesar Philippidis <cesar@codesourcery.com>
Date: Tue, 10 Apr 2018 14:43:42 -0700
Subject: [PATCH] nvptx port
This port adds support for Nvidia GPU's, which are primarily used as
offload accelerators in OpenACC and OpenMP.
Newlib build system defines __SINGLE_THREAD__ to allow concurrency code
to be only compiled when newlib is configured for multithread. One such
example are locks which become useless in single thread mode. Although
most static locks are indeed guarded by !defined(__SINGLE_THREAD__),
some are not.
This commit adds these missing guards to __dd_hash_mutex,
__atexit_recursive_mutex, __at_quick_exit_mutex and __arc4random_mutex.
It also makes sure locking macros in lock.h are noop in single thread
mode.
In preparation for the patch that would allow retargeting of locking
routines, rename all lock objects to follow this pattern:
"__<name>_[recursive_]mutex".
Following locks were renamed:
__dd_hash_lock -> __dd_hash_mutex
__sfp_lock -> __sfp_recursive_mutex
__sinit_lock -> __sinit_recursive_mutex
__atexit_lock -> __atexit_recursive_mutex
_arc4random_mutex -> __arc4random_mutex
__env_lock_object -> __env_recursive_mutex
__malloc_lock_object -> __malloc_recursive_mutex
__atexit_mutex -> __at_quick_exit_mutex
__tz_lock_object -> __tz_mutex
* libc/include/sys/config.h (_REENT_GLOBAL_ATEXIT): Define for
RTEMS.
* libc/include/sys/reent.h (_reent): Use _REENT_GLOBAL_ATEXIT.
(_global_atexit): Declare if _REENT_GLOBAL_ATEXIT is defined.
* libc/reent/reent.c (_reclaim_reent): Remove atexit cleanup if
_REENT_GLOBAL_ATEXIT is defined.
(_wrapup_reent): Remove atexit handling if _REENT_GLOBAL_ATEXIT
is defined.
* libc/stdlib/__atexit.c (_global_atexit0): Define if
_REENT_GLOBAL_ATEXIT is defined.
* libc/stdlib/__call_atexit.c (_global_atexit): Define if
_REENT_GLOBAL_ATEXIT is defined.
* configure.in: Add test for enable-newlib-register-fini
to set the _WANT_REGISTER_FINI flag.
* configure: Regenerated.
* Makefile.in: Ditto.
* newlib.hin: Add _WANT_REGISTER_FINI flag.
* libc/stdlib/__call_atexit.c: Add test for
_WANT_REGISTER_FINI to enable the register_fini function.
* libc/stdlib/__atexit.c (__atexit_lock): Initialise as recursive
rather than non-recursive lock type.
(__register_exitproc): Use recursive locking APIs on it.
* libc/stdlib/__call_atexit.c (__call_exitprocs): Likewise.
Kazu Hirata <kazu@codesourcery.com>
* libc/stdlib/__atexit.c (__register_exitproc): Use weak reference
to malloc. Allocate dynamically only if it is present.
* libc/stdlib/__call_atexit.c (__call_exitprocs): Use weak
reference to free. Call free only if it is present.
Jeff Johnston