[glibc] nptl: Move __pthread_keys global variable into libc

[glibc] nptl: Move __pthread_keys global variable into libc

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=a91bf4e0ff4df92553e72f181ae1f60e1b36503c

commit a91bf4e0ff4df92553e72f181ae1f60e1b36503c
Author: Florian Weimer <fweimer@redhat.com>
Date:   Wed Apr 21 19:49:50 2021 +0200

    nptl: Move __pthread_keys global variable into libc
    
    This prepares moving pthread_exit, and later the pthread_key_create
    infrastructure.
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 nptl/Makefile       |  1 +
 nptl/Versions       |  1 +
 nptl/pthreadP.h     |  2 +-
 nptl/pthread_keys.c | 24 ++++++++++++++++++++++++
 nptl/vars.c         |  5 -----
 nptl_db/structs.def |  2 +-
 6 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/nptl/Makefile b/nptl/Makefile
index dce54d02df..21119910c5 100644
--- a/nptl/Makefile
+++ b/nptl/Makefile
@@ -76,6 +76,7 @@ routines = \
   pthread_getaffinity \
   pthread_getattr_np \
   pthread_getschedparam \
+  pthread_keys \
   pthread_kill \
   pthread_mutex_consistent \
   pthread_once \
diff --git a/nptl/Versions b/nptl/Versions
index b4ee1bf309..51f8d65bf9 100644
--- a/nptl/Versions
+++ b/nptl/Versions
@@ -119,6 +119,7 @@ libc {
     __pthread_cond_init; # Used by the C11 threads.
     __pthread_force_elision;
     __pthread_getattr_default_np;
+    __pthread_keys;
     __pthread_unwind;
   }
 }
diff --git a/nptl/pthreadP.h b/nptl/pthreadP.h
index 64ec71c23f..c6f95c70a1 100644
--- a/nptl/pthreadP.h
+++ b/nptl/pthreadP.h
@@ -217,7 +217,7 @@ extern int __concurrency_level attribute_hidden;
 
 /* Thread-local data key handling.  */
 extern struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX];
-hidden_proto (__pthread_keys)
+libc_hidden_proto (__pthread_keys)
 
 /* Number of threads running.  */
 extern unsigned int __nptl_nthreads;
diff --git a/nptl/pthread_keys.c b/nptl/pthread_keys.c
new file mode 100644
index 0000000000..76e4cfad34
--- /dev/null
+++ b/nptl/pthread_keys.c
@@ -0,0 +1,24 @@
+/* Table of pthread_key_create keys and their destructors.
+   Copyright (C) 2004-2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <pthreadP.h>
+
+/* Table of the key information.  */
+struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]
+  __attribute__ ((nocommon));
+libc_hidden_data_def (__pthread_keys)
diff --git a/nptl/vars.c b/nptl/vars.c
index 51de9fbd54..8de30856b8 100644
--- a/nptl/vars.c
+++ b/nptl/vars.c
@@ -33,8 +33,3 @@ int __default_pthread_attr_lock = LLL_LOCK_INITIALIZER;
    nptl/descr.h for more context on the single-threaded process case.  */
 int __pthread_multiple_threads attribute_hidden;
 #endif
-
-/* Table of the key information.  */
-struct pthread_key_struct __pthread_keys[PTHREAD_KEYS_MAX]
-  __attribute__ ((nocommon));
-hidden_data_def (__pthread_keys)
diff --git a/nptl_db/structs.def b/nptl_db/structs.def
index 6de2700f84..9173e1ab8f 100644
--- a/nptl_db/structs.def
+++ b/nptl_db/structs.def
@@ -82,7 +82,7 @@ DB_MAIN_VARIABLE (__nptl_nthreads)
 DB_VARIABLE (__nptl_last_event)
 DB_VARIABLE (__nptl_initial_report_events)
 
-DB_ARRAY_VARIABLE (__pthread_keys)
+DB_MAIN_ARRAY_VARIABLE (__pthread_keys)
 DB_STRUCT (pthread_key_struct)
 DB_STRUCT_FIELD (pthread_key_struct, seq)
 DB_STRUCT_FIELD (pthread_key_struct, destr)