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/*
* Copyright (C) 2020 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 <sys/mman.h>
#include <sys/types.h>
#include <gtest/gtest.h>
#ifdef __ANDROID__
#include <bionic/mte.h>
#endif
#include "MemoryLocal.h"
#include "MemoryRemote.h"
#include "PidUtils.h"
#include "TestUtils.h"
namespace unwindstack {
static uintptr_t CreateTagMapping() {
#if defined(__aarch64__)
uintptr_t mapping =
reinterpret_cast<uintptr_t>(mmap(nullptr, getpagesize(), PROT_READ | PROT_WRITE | PROT_MTE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0));
if (reinterpret_cast<void*>(mapping) == MAP_FAILED) {
return 0;
}
__asm__ __volatile__(".arch_extension mte; stg %0, [%0]"
:
: "r"(mapping + (1ULL << 56))
: "memory");
return mapping;
#else
return 0;
#endif
}
TEST(MemoryMteTest, remote_read_tag) {
#if !defined(__aarch64__)
GTEST_SKIP() << "Requires aarch64";
#else
if (!mte_supported()) {
GTEST_SKIP() << "Requires MTE";
}
#endif
uintptr_t mapping = CreateTagMapping();
ASSERT_NE(0U, mapping);
pid_t pid;
if ((pid = fork()) == 0) {
while (true)
;
exit(1);
}
ASSERT_LT(0, pid);
TestScopedPidReaper reap(pid);
ASSERT_TRUE(Attach(pid));
MemoryRemote remote(pid);
EXPECT_EQ(1, remote.ReadTag(mapping));
EXPECT_EQ(0, remote.ReadTag(mapping + 16));
ASSERT_TRUE(Detach(pid));
}
TEST(MemoryMteTest, local_read_tag) {
#if !defined(__aarch64__)
GTEST_SKIP() << "Requires aarch64";
#else
if (!mte_supported()) {
GTEST_SKIP() << "Requires MTE";
}
#endif
uintptr_t mapping = CreateTagMapping();
ASSERT_NE(0U, mapping);
MemoryLocal local;
EXPECT_EQ(1, local.ReadTag(mapping));
EXPECT_EQ(0, local.ReadTag(mapping + 16));
}
} // namespace unwindstack
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