47 lines
1.4 KiB
C++
47 lines
1.4 KiB
C++
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/android/library_loader/library_prefetcher.h"
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#include <stddef.h>
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#include <stdint.h>
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#include <sys/mman.h>
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#include "base/android/library_loader/anchor_functions_buildflags.h"
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#include "base/memory/shared_memory.h"
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#include "build/build_config.h"
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#include "testing/gtest/include/gtest/gtest.h"
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#if BUILDFLAG(SUPPORTS_CODE_ORDERING)
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namespace base {
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namespace android {
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// Fails with ASAN, crbug.com/570423.
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#if !defined(ADDRESS_SANITIZER)
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namespace {
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const size_t kPageSize = 4096;
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} // namespace
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TEST(NativeLibraryPrefetcherTest, TestPercentageOfResidentCode) {
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size_t length = 4 * kPageSize;
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base::SharedMemory shared_mem;
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ASSERT_TRUE(shared_mem.CreateAndMapAnonymous(length));
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void* address = shared_mem.memory();
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size_t start = reinterpret_cast<size_t>(address);
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size_t end = start + length;
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// Remove everything.
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ASSERT_EQ(0, madvise(address, length, MADV_DONTNEED));
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EXPECT_EQ(0, NativeLibraryPrefetcher::PercentageOfResidentCode(start, end));
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// Get everything back.
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ASSERT_EQ(0, mlock(address, length));
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EXPECT_EQ(100, NativeLibraryPrefetcher::PercentageOfResidentCode(start, end));
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munlock(address, length);
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}
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#endif // !defined(ADDRESS_SANITIZER)
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} // namespace android
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} // namespace base
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#endif // BUILDFLAG(SUPPORTS_CODE_ORDERING)
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