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/*
* Copyright (C) 2011 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 "intern_table.h"
#include "common_test.h"
#include "mirror/object.h"
#include "sirt_ref.h"
namespace art {
class InternTableTest : public CommonTest {};
TEST_F(InternTableTest, Intern) {
ScopedObjectAccess soa(Thread::Current());
InternTable intern_table;
SirtRef<mirror::String> foo_1(soa.Self(), intern_table.InternStrong(3, "foo"));
SirtRef<mirror::String> foo_2(soa.Self(), intern_table.InternStrong(3, "foo"));
SirtRef<mirror::String> foo_3(soa.Self(), mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
SirtRef<mirror::String> bar(soa.Self(), intern_table.InternStrong(3, "bar"));
EXPECT_TRUE(foo_1->Equals("foo"));
EXPECT_TRUE(foo_2->Equals("foo"));
EXPECT_TRUE(foo_3->Equals("foo"));
EXPECT_TRUE(foo_1.get() != NULL);
EXPECT_TRUE(foo_2.get() != NULL);
EXPECT_EQ(foo_1.get(), foo_2.get());
EXPECT_NE(foo_1.get(), bar.get());
EXPECT_NE(foo_2.get(), bar.get());
EXPECT_NE(foo_3.get(), bar.get());
}
TEST_F(InternTableTest, Size) {
ScopedObjectAccess soa(Thread::Current());
InternTable t;
EXPECT_EQ(0U, t.Size());
t.InternStrong(3, "foo");
SirtRef<mirror::String> foo(soa.Self(), mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
t.InternWeak(foo.get());
EXPECT_EQ(1U, t.Size());
t.InternStrong(3, "bar");
EXPECT_EQ(2U, t.Size());
}
class TestPredicate {
public:
bool IsMarked(const mirror::Object* s) const {
bool erased = false;
typedef std::vector<const mirror::String*>::iterator It; // TODO: C++0x auto
for (It it = expected_.begin(), end = expected_.end(); it != end; ++it) {
if (*it == s) {
expected_.erase(it);
erased = true;
break;
}
}
EXPECT_TRUE(erased);
return false;
}
void Expect(const mirror::String* s) {
expected_.push_back(s);
}
~TestPredicate() {
EXPECT_EQ(0U, expected_.size());
}
private:
mutable std::vector<const mirror::String*> expected_;
};
bool IsMarked(const mirror::Object* object, void* arg) {
return reinterpret_cast<TestPredicate*>(arg)->IsMarked(object);
}
TEST_F(InternTableTest, SweepInternTableWeaks) {
ScopedObjectAccess soa(Thread::Current());
InternTable t;
t.InternStrong(3, "foo");
t.InternStrong(3, "bar");
SirtRef<mirror::String> hello(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "hello"));
SirtRef<mirror::String> world(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "world"));
SirtRef<mirror::String> s0(soa.Self(), t.InternWeak(hello.get()));
SirtRef<mirror::String> s1(soa.Self(), t.InternWeak(world.get()));
EXPECT_EQ(4U, t.Size());
// We should traverse only the weaks...
TestPredicate p;
p.Expect(s0.get());
p.Expect(s1.get());
{
ReaderMutexLock mu(soa.Self(), *Locks::heap_bitmap_lock_);
t.SweepInternTableWeaks(IsMarked, &p);
}
EXPECT_EQ(2U, t.Size());
// Just check that we didn't corrupt the map.
SirtRef<mirror::String> still_here(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "still here"));
t.InternWeak(still_here.get());
EXPECT_EQ(3U, t.Size());
}
TEST_F(InternTableTest, ContainsWeak) {
ScopedObjectAccess soa(Thread::Current());
{
// Strongs are never weak.
InternTable t;
SirtRef<mirror::String> interned_foo_1(soa.Self(), t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<mirror::String> interned_foo_2(soa.Self(), t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// Weaks are always weak.
InternTable t;
SirtRef<mirror::String> foo_1(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
SirtRef<mirror::String> foo_2(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
EXPECT_NE(foo_1.get(), foo_2.get());
SirtRef<mirror::String> interned_foo_1(soa.Self(), t.InternWeak(foo_1.get()));
SirtRef<mirror::String> interned_foo_2(soa.Self(), t.InternWeak(foo_2.get()));
EXPECT_TRUE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// A weak can be promoted to a strong.
InternTable t;
SirtRef<mirror::String> foo(soa.Self(), mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
SirtRef<mirror::String> interned_foo_1(soa.Self(), t.InternWeak(foo.get()));
EXPECT_TRUE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<mirror::String> interned_foo_2(soa.Self(), t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
{
// Interning a weak after a strong gets you the strong.
InternTable t;
SirtRef<mirror::String> interned_foo_1(soa.Self(), t.InternStrong(3, "foo"));
EXPECT_FALSE(t.ContainsWeak(interned_foo_1.get()));
SirtRef<mirror::String> foo(soa.Self(),
mirror::String::AllocFromModifiedUtf8(soa.Self(), "foo"));
SirtRef<mirror::String> interned_foo_2(soa.Self(), t.InternWeak(foo.get()));
EXPECT_FALSE(t.ContainsWeak(interned_foo_2.get()));
EXPECT_EQ(interned_foo_1.get(), interned_foo_2.get());
}
}
} // namespace art
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