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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/discardable_memory.h"
#include "base/memory/discardable_memory_internal.h"
#include "base/metrics/field_trial.h"
#include "base/metrics/field_trial_params.h"
#include "base/test/scoped_feature_list.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#if BUILDFLAG(IS_POSIX)
#include "base/memory/madv_free_discardable_memory_posix.h"
#endif // BUILDFLAG(IS_POSIX)
#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
namespace base {
class DiscardableMemoryBackingFieldTrialTest : public ::testing::Test {
protected:
DiscardableMemoryBackingFieldTrialTest() = default;
~DiscardableMemoryBackingFieldTrialTest() override = default;
std::unique_ptr<test::ScopedFeatureList>
GetScopedFeatureListForDiscardableMemoryTrialGroup(
DiscardableMemoryTrialGroup group) {
auto feature_list = std::make_unique<test::ScopedFeatureList>();
feature_list->InitAndEnableFeatureWithParameters(
base::features::kDiscardableMemoryBackingTrial,
{{features::kDiscardableMemoryBackingParam.name,
features::kDiscardableMemoryBackingParamOptions[group].name}});
return feature_list;
}
};
TEST_F(DiscardableMemoryBackingFieldTrialTest, TrialActiveOnlyIfCapable) {
std::unique_ptr<test::ScopedFeatureList> scoped_feature =
GetScopedFeatureListForDiscardableMemoryTrialGroup(
DiscardableMemoryTrialGroup::kEmulatedSharedMemory);
FieldTrial* trial =
FeatureList::GetFieldTrial(features::kDiscardableMemoryBackingTrial);
ASSERT_NE(trial, nullptr);
// Ensure the trial goes from disabled to enabled after querying state, if and
// only if we are capable of running the trial. We have force enabled the
// trial feature in the feature list, so |trial_enabled| implies that the
// device is capable.
EXPECT_FALSE(FieldTrialList::IsTrialActive(trial->trial_name()));
bool trial_enabled = DiscardableMemoryBackingFieldTrialIsEnabled();
EXPECT_EQ(trial_enabled, FieldTrialList::IsTrialActive(trial->trial_name()));
}
TEST_F(DiscardableMemoryBackingFieldTrialTest,
EmulatedSharedMemoryBackingMatchesTrialGroup) {
std::unique_ptr<test::ScopedFeatureList> scoped_feature =
GetScopedFeatureListForDiscardableMemoryTrialGroup(
DiscardableMemoryTrialGroup::kEmulatedSharedMemory);
if (!DiscardableMemoryBackingFieldTrialIsEnabled())
return;
DiscardableMemoryBacking backing = GetDiscardableMemoryBacking();
EXPECT_EQ(backing, DiscardableMemoryBacking::kSharedMemory);
}
TEST_F(DiscardableMemoryBackingFieldTrialTest,
MadvFreeBackingMatchesTrialGroup) {
std::unique_ptr<test::ScopedFeatureList> scoped_feature =
GetScopedFeatureListForDiscardableMemoryTrialGroup(
DiscardableMemoryTrialGroup::kMadvFree);
if (!DiscardableMemoryBackingFieldTrialIsEnabled())
return;
DiscardableMemoryBacking backing = GetDiscardableMemoryBacking();
EXPECT_EQ(backing, DiscardableMemoryBacking::kMadvFree);
}
#if BUILDFLAG(IS_ANDROID)
TEST_F(DiscardableMemoryBackingFieldTrialTest, AshmemBackingMatchesTrialGroup) {
std::unique_ptr<test::ScopedFeatureList> scoped_feature =
GetScopedFeatureListForDiscardableMemoryTrialGroup(
DiscardableMemoryTrialGroup::kAshmem);
if (!DiscardableMemoryBackingFieldTrialIsEnabled())
return;
DiscardableMemoryBacking backing = GetDiscardableMemoryBacking();
EXPECT_EQ(backing, DiscardableMemoryBacking::kSharedMemory);
}
#endif // BUILDFLAG(IS_ANDROID)
} // namespace base
#endif // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) ||
// BUILDFLAG(IS_CHROMEOS)
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