bionic: Add tests for cpu target features

This adds actual tests to verify we are enabling basic
These tests are intended to be expanded as we require
stricter target features.

These tests depend on the existence of the cpu-target-features
executable on the test DUTs.

Bug: 354747380
Test: Presubmits pass

Change-Id: If2d0a9db04e112874cb65b5d4cfd48c9ee2efa4b

Author: ajordanr-google

tests/Android.bp

@@ -389,6 +389,7 @@ cc_test_library {
         "bug_26110743_test.cpp",
         "byteswap_test.cpp",
         "complex_test.cpp",
+        "cpu_target_features_test.cpp",
         "ctype_test.cpp",
         "dirent_test.cpp",
         "elf_test.cpp",

tests/cpu_target_features_test.cpp

@@ -0,0 +1,68 @@
+/*
+ * Copyright (C) 2024 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 <stdlib.h>
+
+#include "utils.h"
+
+TEST(cpu_target_features, has_expected_x86_compiler_values) {
+#if defined(__x86_64__) || defined(__i386__)
+  ExecTestHelper eth;
+  char* const argv[] = {nullptr};
+  const auto invocation = [&] { execvp("cpu-target-features", argv); };
+  eth.Run(invocation, 0, "(^|\n)__AES__=1($|\n)");
+  eth.Run(invocation, 0, "(^|\n)__CRC32__=1($|\n)");
+#else
+  GTEST_SKIP() << "Not targeting an x86 architecture.";
+#endif
+}
+
+TEST(cpu_target_features, has_expected_aarch64_compiler_values) {
+#if defined(__aarch64__)
+  ExecTestHelper eth;
+  char* const argv[] = {nullptr};
+  const auto invocation = [&] { execvp("cpu-target-features", argv); };
+  eth.Run(invocation, 0, "(^|\n)__ARM_FEATURE_AES=1($|\n)");
+  eth.Run(invocation, 0, "(^|\n)__ARM_FEATURE_CRC32=1($|\n)");
+#else
+  GTEST_SKIP() << "Not targeting an aarch64 architecture.";
+#endif
+}
+
+TEST(cpu_target_features, has_expected_arm_compiler_values) {
+#if defined(__arm__)
+  ExecTestHelper eth;
+  char* const argv[] = {nullptr};
+  const auto invocation = [&] { execvp("cpu-target-features", argv); };
+  eth.Run(invocation, 0, "(^|\n)__ARM_FEATURE_AES=1($|\n)");
+  eth.Run(invocation, 0, "(^|\n)__ARM_FEATURE_CRC32=1($|\n)");
+#else
+  GTEST_SKIP() << "Not targeting an arm architecture.";
+#endif
+}