1 files changed, 85 insertions, 0 deletions
diff --git a/tests/elftls_test.cpp b/tests/elftls_test.cpp
new file mode 100644
index 000000000..11d41ce43
--- /dev/null
+++ b/tests/elftls_test.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <gtest/gtest.h>
+
+#include <thread>
+
+#include "private/__get_tls.h"
+
+// Specify the LE access model explicitly. This file is compiled into the
+// bionic-unit-tests executable, but the compiler sees an -fpic object file
+// output into a static library, so it defaults to dynamic TLS accesses.
+
+// This variable will be zero-initialized (.tbss)
+__attribute__((tls_model("local-exec"))) static __thread int tlsvar_le_zero;
+
+// This variable will have an initializer (.tdata)
+__attribute__((tls_model("local-exec"))) static __thread int tlsvar_le_init = 10;
+
+// Access libtest_elftls_shared_var's TLS variable using an IE access.
+__attribute__((tls_model("initial-exec"))) extern "C" __thread int elftls_shared_var;
+
+TEST(elftls, basic_le) {
+  // Check the variables on the main thread.
+  ASSERT_EQ(11, ++tlsvar_le_init);
+  ASSERT_EQ(1, ++tlsvar_le_zero);
+
+  // Check variables on a new thread.
+  std::thread([] {
+    ASSERT_EQ(11, ++tlsvar_le_init);
+    ASSERT_EQ(1, ++tlsvar_le_zero);
+  }).join();
+}
+
+TEST(elftls, shared_ie) {
+  ASSERT_EQ(21, ++elftls_shared_var);
+  std::thread([] {
+    ASSERT_EQ(21, ++elftls_shared_var);
+  }).join();
+}
+
+extern "C" int* missing_weak_tls_addr();
+extern "C" int bump_static_tls_var_1();
+extern "C" int bump_static_tls_var_2();
+
+TEST(elftls, tprel_missing_weak) {
+  ASSERT_EQ(static_cast<void*>(__get_tls()), missing_weak_tls_addr());
+  std::thread([] {
+    ASSERT_EQ(static_cast<void*>(__get_tls()), missing_weak_tls_addr());
+  }).join();
+}
+
+TEST(elftls, tprel_addend) {
+  ASSERT_EQ(4, bump_static_tls_var_1());
+  ASSERT_EQ(8, bump_static_tls_var_2());
+  std::thread([] {
+    ASSERT_EQ(4, bump_static_tls_var_1());
+    ASSERT_EQ(8, bump_static_tls_var_2());
+  }).join();
+}