1 //===-- Loader test to check if tls size is read correctly ----------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "include/errno.h"
10 #include "include/sys/mman.h"
11 
12 #include "src/errno/llvmlibc_errno.h"
13 #include "src/sys/mman/mmap.h"
14 #include "utils/IntegrationTest/test.h"
15 
16 constexpr int threadLocalDataSize = 101;
17 _Thread_local int a[threadLocalDataSize] = {123};
18 
19 int main(int argc, char **argv, char **envp) {
20   ASSERT_TRUE(a[0] == 123);
21 
22   for (int i = 1; i < threadLocalDataSize; ++i)
23     a[i] = i;
24   for (int i = 1; i < threadLocalDataSize; ++i)
25     ASSERT_TRUE(a[i] == i);
26 
27   // Call mmap with bad params so that an error value is
28   // set in errno. Since errno is implemented using a thread
29   // local var, this helps us test setting of errno and
30   // reading it back.
31   ASSERT_TRUE(llvmlibc_errno == 0);
32   void *addr = __llvm_libc::mmap(nullptr, 0, PROT_READ,
33                                  MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
34   ASSERT_TRUE(addr == MAP_FAILED);
35   ASSERT_TRUE(llvmlibc_errno == EINVAL);
36 
37   return 0;
38 }
39