libc support for thread-local storage

RTC: 124148
Change-Id: I055885bc7d7cfc4ebd7cf1a662f677bdf4e28c62
Reviewed-on: http://gfw160.aus.stglabs.ibm.com:8080/gerrit/22313
Tested-by: Jenkins Server
Reviewed-by: Richard J. Knight <rjknight@us.ibm.com>
Reviewed-by: Brian Silver <bsilver@us.ibm.com>
Reviewed-by: A. Patrick Williams III <iawillia@us.ibm.com>

1 files changed, 75 insertions, 0 deletions

diff --git a/src/usr/testcore/lib/tls.H b/src/usr/testcore/lib/tls.H
new file mode 100644
index 000000000..84f7906a0
--- /dev/null
+++ b/src/usr/testcore/lib/tls.H
@@ -0,0 +1,75 @@
+/* IBM_PROLOG_BEGIN_TAG                                                   */
+/* This is an automatically generated prolog.                             */
+/*                                                                        */
+/* $Source: src/usr/testcore/lib/tls.H $                                  */
+/*                                                                        */
+/* OpenPOWER HostBoot Project                                             */
+/*                                                                        */
+/* Contributors Listed Below - COPYRIGHT 2015                             */
+/* [+] International Business Machines Corp.                              */
+/*                                                                        */
+/*                                                                        */
+/* Licensed under the Apache License, Version 2.0 (the "License");        */
+/* you may not use this file except in compliance with the License.       */
+/* You may obtain a copy of the License at                                */
+/*                                                                        */
+/*     http://www.apache.org/licenses/LICENSE-2.0                         */
+/*                                                                        */
+/* Unless required by applicable law or agreed to in writing, software    */
+/* distributed under the License is distributed on an "AS IS" BASIS,      */
+/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or        */
+/* implied. See the License for the specific language governing           */
+/* permissions and limitations under the License.                         */
+/*                                                                        */
+/* IBM_PROLOG_END_TAG                                                     */
+#ifndef __LIB_TLS_H
+#define __LIB_TLS_H
+
+#include <cxxtest/TestSuite.H>
+#include <sys/task.h>
+
+namespace __tls_test
+{
+    thread_local size_t foobar = 0xabcd1234;
+
+    void* test_tls(void* unused)
+    {
+        decltype(foobar) rc;
+
+        rc = foobar;
+        if(rc != 0xabcd1234)
+        {
+            TS_FAIL("TLS not initialized correctly: %ld", rc);
+        }
+
+        task_yield();
+
+        foobar++;
+
+        task_yield();
+
+        rc = foobar;
+        if(rc != 0xabcd1235)
+        {
+            TS_FAIL("TLS increment not operating correctly: %ld", rc);
+        }
+
+        return nullptr;
+    }
+};
+
+class LibcTlsTest : public CxxTest::TestSuite
+{
+    public:
+        void testTls()
+        {
+            auto t1 = task_create(__tls_test::test_tls, nullptr);
+            auto t2 = task_create(__tls_test::test_tls, nullptr);
+            auto t3 = task_create(__tls_test::test_tls, nullptr);
+            task_wait_tid(t1, nullptr, nullptr);
+            task_wait_tid(t2, nullptr, nullptr);
+            task_wait_tid(t3, nullptr, nullptr);
+        }
+
+};
+#endif