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66 lines
2.5 KiB
66 lines
2.5 KiB
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <sys/auxv.h>
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#include <errno.h>
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#include <sys/cdefs.h>
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#include <sys/utsname.h>
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#include <gtest/gtest.h>
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TEST(getauxval, expected_values) {
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ASSERT_EQ(0UL, getauxval(AT_SECURE));
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ASSERT_EQ(getuid(), getauxval(AT_UID));
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ASSERT_EQ(geteuid(), getauxval(AT_EUID));
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ASSERT_EQ(getgid(), getauxval(AT_GID));
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ASSERT_EQ(getegid(), getauxval(AT_EGID));
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ASSERT_EQ(static_cast<unsigned long>(getpagesize()), getauxval(AT_PAGESZ));
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ASSERT_NE(0UL, getauxval(AT_PHDR));
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ASSERT_NE(0UL, getauxval(AT_PHNUM));
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ASSERT_NE(0UL, getauxval(AT_ENTRY));
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ASSERT_NE(0UL, getauxval(AT_PAGESZ));
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}
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TEST(getauxval, unexpected_values) {
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errno = 0;
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ASSERT_EQ(0UL, getauxval(0xdeadbeef));
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ASSERT_EQ(ENOENT, errno);
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}
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TEST(getauxval, arm_has_AT_HWCAP2) {
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#if defined(__arm__)
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// There are no known 32-bit processors that implement any of these instructions, so rather
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// than require that OEMs backport kernel patches, let's just ignore old hardware. Strictly
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// speaking this would be fooled by someone choosing to ship a 32-bit kernel on 64-bit hardware,
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// but that doesn't seem very likely in 2016.
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utsname u;
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ASSERT_EQ(0, uname(&u));
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if (strcmp(u.machine, "aarch64") == 0) {
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// If this test fails, apps that use getauxval to decide at runtime whether crypto hardware is
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// available will incorrectly assume that it isn't, and will have really bad performance.
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// If this test fails, ensure that you've enabled COMPAT_BINFMT_ELF in your kernel configuration.
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// Note that 0 ("I don't support any of these things") is a legitimate response --- we need
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// to check errno to see whether we got a "true" 0 or a "not found" 0.
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errno = 0;
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getauxval(AT_HWCAP2);
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ASSERT_EQ(0, errno) << "64-bit kernel not reporting AT_HWCAP2 to 32-bit ARM process";
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return;
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}
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#endif
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GTEST_SKIP() << "This test is only meaningful for 32-bit ARM code on 64-bit devices";
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}
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