xref: /llvm-project/libc/test/integration/startup/linux/tls_test.cpp (revision 46944b0cbc9a9d8daad0182c40fcd3560bc9ca35)
19a077806SSiva Chandra Reddy //===-- Loader test to check if tls size is read correctly ----------------===//
29a077806SSiva Chandra Reddy //
39a077806SSiva Chandra Reddy // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
49a077806SSiva Chandra Reddy // See https://llvm.org/LICENSE.txt for license information.
59a077806SSiva Chandra Reddy // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
69a077806SSiva Chandra Reddy //
79a077806SSiva Chandra Reddy //===----------------------------------------------------------------------===//
89a077806SSiva Chandra Reddy 
90b70f95cSSiva Chandra Reddy #include "src/errno/libc_errno.h"
109a077806SSiva Chandra Reddy #include "src/sys/mman/mmap.h"
11af1315c2SSiva Chandra Reddy #include "test/IntegrationTest/test.h"
129a077806SSiva Chandra Reddy 
130ab14951SPetr Hosek #include <sys/mman.h>
140ab14951SPetr Hosek 
159a077806SSiva Chandra Reddy constexpr int threadLocalDataSize = 101;
169a077806SSiva Chandra Reddy _Thread_local int a[threadLocalDataSize] = {123};
179a077806SSiva Chandra Reddy 
189a077806SSiva Chandra Reddy TEST_MAIN(int argc, char **argv, char **envp) {
199a077806SSiva Chandra Reddy   ASSERT_TRUE(a[0] == 123);
209a077806SSiva Chandra Reddy 
219a077806SSiva Chandra Reddy   for (int i = 1; i < threadLocalDataSize; ++i)
229a077806SSiva Chandra Reddy     a[i] = i;
239a077806SSiva Chandra Reddy   for (int i = 1; i < threadLocalDataSize; ++i)
249a077806SSiva Chandra Reddy     ASSERT_TRUE(a[i] == i);
259a077806SSiva Chandra Reddy 
269a077806SSiva Chandra Reddy   // Call mmap with bad params so that an error value is
279a077806SSiva Chandra Reddy   // set in errno. Since errno is implemented using a thread
289a077806SSiva Chandra Reddy   // local var, this helps us test setting of errno and
299a077806SSiva Chandra Reddy   // reading it back.
3028699e38Slntue   ASSERT_ERRNO_SUCCESS();
31b6bc9d72SGuillaume Chatelet   void *addr = LIBC_NAMESPACE::mmap(nullptr, 0, PROT_READ,
329a077806SSiva Chandra Reddy                                     MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
339a077806SSiva Chandra Reddy   ASSERT_TRUE(addr == MAP_FAILED);
34*94166c6eSlntue   ASSERT_ERRNO_EQ(EINVAL);
359a077806SSiva Chandra Reddy 
369a077806SSiva Chandra Reddy   return 0;
379a077806SSiva Chandra Reddy }
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