d4c9112490
"I have none of these capabilities" is a legitimate response, and distinct from "I don't know what my capabilities are". It's the latter I meant to test for. Bug: http://b/27810985 Change-Id: Id165423e62390051cbf23fdda54f28d94566cbe7
78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
/*
|
|
* Copyright (C) 2013 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <errno.h>
|
|
#include <sys/cdefs.h>
|
|
#include <gtest/gtest.h>
|
|
|
|
// getauxval() was only added as of glibc version 2.16.
|
|
// See: http://lwn.net/Articles/519085/
|
|
// Don't try to compile this code on older glibc versions.
|
|
|
|
#if defined(__BIONIC__)
|
|
#define GETAUXVAL_CAN_COMPILE 1
|
|
#elif defined(__GLIBC_PREREQ)
|
|
#if __GLIBC_PREREQ(2, 16)
|
|
#define GETAUXVAL_CAN_COMPILE 1
|
|
#endif
|
|
#endif
|
|
|
|
#if defined(GETAUXVAL_CAN_COMPILE)
|
|
#include <sys/auxv.h>
|
|
#endif
|
|
|
|
TEST(getauxval, expected_values) {
|
|
#if defined(GETAUXVAL_CAN_COMPILE)
|
|
ASSERT_EQ(0UL, getauxval(AT_SECURE));
|
|
ASSERT_EQ(getuid(), getauxval(AT_UID));
|
|
ASSERT_EQ(geteuid(), getauxval(AT_EUID));
|
|
ASSERT_EQ(getgid(), getauxval(AT_GID));
|
|
ASSERT_EQ(getegid(), getauxval(AT_EGID));
|
|
ASSERT_EQ(static_cast<unsigned long>(getpagesize()), getauxval(AT_PAGESZ));
|
|
|
|
ASSERT_NE(0UL, getauxval(AT_PHDR));
|
|
ASSERT_NE(0UL, getauxval(AT_PHNUM));
|
|
ASSERT_NE(0UL, getauxval(AT_ENTRY));
|
|
ASSERT_NE(0UL, getauxval(AT_PAGESZ));
|
|
#else
|
|
GTEST_LOG_(INFO) << "This test requires a C library with getauxval.\n";
|
|
#endif
|
|
}
|
|
|
|
TEST(getauxval, unexpected_values) {
|
|
#if defined(GETAUXVAL_CAN_COMPILE)
|
|
errno = 0;
|
|
ASSERT_EQ(0UL, getauxval(0xdeadbeef));
|
|
ASSERT_EQ(ENOENT, errno);
|
|
#else
|
|
GTEST_LOG_(INFO) << "This test requires a C library with getauxval.\n";
|
|
#endif
|
|
}
|
|
|
|
TEST(getauxval, arm_has_AT_HWCAP2) {
|
|
#if defined(__arm__)
|
|
// If this test fails, apps that use getauxval to decide at runtime whether crypto hardware is
|
|
// available will incorrectly assume that it isn't, and will have really bad performance.
|
|
// If this test fails, ensure that you've enabled COMPAT_BINFMT_ELF in your kernel configuration.
|
|
// Note that 0 ("I don't support any of these things") is a legitimate response --- we need
|
|
// to check errno to see whether we got a "true" 0 or a "not found" 0.
|
|
errno = 0;
|
|
getauxval(AT_HWCAP2);
|
|
ASSERT_EQ(0, errno) << "kernel not reporting AT_HWCAP2 to 32-bit ARM process";
|
|
#else
|
|
GTEST_LOG_(INFO) << "This test is only meaningful for 32-bit ARM code.\n";
|
|
#endif
|
|
}
|