Add a thread-properties API
(Based on proposal at https://sourceware.org/glibc/wiki/ThreadPropertiesAPI)
This includes API to:
- locate static and dynamic TLS
- register thread-exit and dynamic TLS creation/destruction callbacks
Change-Id: Icd9d29a5b2f47495395645e19d3b2c96826f19c8
diff --git a/tests/libs/tls_properties_helper.cpp b/tests/libs/tls_properties_helper.cpp
new file mode 100644
index 0000000..93f5e9f
--- /dev/null
+++ b/tests/libs/tls_properties_helper.cpp
@@ -0,0 +1,75 @@
+/*
+ * 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.
+ */
+
+// Prevent tests from being compiled with glibc because thread_properties.h
+// only exists in Bionic.
+#if defined(__BIONIC__)
+
+#include <sys/thread_properties.h>
+
+#include <dlfcn.h>
+#include <stdio.h>
+#include <unistd.h> // for gettid
+
+// Helper binary to use TLS-related functions in thread_properties
+
+// Tests __get_static_tls_bound.
+void test_static_tls_bounds() {
+ void* start_addr;
+ void* end_addr;
+
+ __libc_get_static_tls_bounds(reinterpret_cast<void**>(&start_addr),
+ reinterpret_cast<void**>(&end_addr));
+ printf("done_get_static_tls_bounds\n");
+}
+
+// Tests iterate_dynamic tls chunks.
+// Export a var from the shared so.
+__thread char large_tls_var[4 * 1024 * 1024];
+void test_iter_tls() {
+ void* lib = dlopen("libtest_elftls_dynamic.so", RTLD_LOCAL | RTLD_NOW);
+
+ int i = 0;
+ auto cb = [&](void* dtls_begin, void* dtls_end, size_t dso_id, void* arg) {
+ printf("iterate_cb i = %d\n", i++);
+ };
+ __libc_iterate_dynamic_tls(gettid(), cb, nullptr);
+ printf("done_iterate_dynamic_tls\n");
+}
+
+int main() {
+ test_static_tls_bounds();
+ test_iter_tls();
+ return 0;
+}
+
+#else
+int main() {
+ return 0;
+}
+#endif // __BIONIC__