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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 "reference_table.h"
#include "class_linker.h"
#include "common_runtime_test.h"
#include "handle_scope-inl.h"
#include "mirror/array-inl.h"
#include "mirror/class-inl.h"
#include "mirror/class_loader.h"
#include "mirror/string.h"
#include "primitive.h"
#include "runtime.h"
#include "scoped_thread_state_change-inl.h"
#include "thread-inl.h"
namespace art {
class ReferenceTableTest : public CommonRuntimeTest {};
static mirror::Object* CreateWeakReference(mirror::Object* referent)
REQUIRES_SHARED(Locks::mutator_lock_) {
Thread* self = Thread::Current();
ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
StackHandleScope<3> scope(self);
Handle<mirror::Object> h_referent(scope.NewHandle<mirror::Object>(referent));
Handle<mirror::Class> h_ref_class(scope.NewHandle<mirror::Class>(
class_linker->FindClass(self,
"Ljava/lang/ref/WeakReference;",
ScopedNullHandle<mirror::ClassLoader>())));
CHECK(h_ref_class.Get() != nullptr);
CHECK(class_linker->EnsureInitialized(self, h_ref_class, true, true));
Handle<mirror::Object> h_ref_instance(scope.NewHandle<mirror::Object>(
h_ref_class->AllocObject(self)));
CHECK(h_ref_instance.Get() != nullptr);
ArtMethod* constructor = h_ref_class->FindDeclaredDirectMethod(
"<init>", "(Ljava/lang/Object;)V", class_linker->GetImagePointerSize());
CHECK(constructor != nullptr);
uint32_t args[2];
args[0] = PointerToLowMemUInt32(h_ref_instance.Get());
args[1] = PointerToLowMemUInt32(h_referent.Get());
JValue result;
constructor->Invoke(self, args, sizeof(uint32_t), &result, constructor->GetShorty());
CHECK(!self->IsExceptionPending());
return h_ref_instance.Get();
}
TEST_F(ReferenceTableTest, Basics) {
ScopedObjectAccess soa(Thread::Current());
mirror::Object* o1 = mirror::String::AllocFromModifiedUtf8(soa.Self(), "hello");
ReferenceTable rt("test", 0, 11);
// Check dumping the empty table.
{
std::ostringstream oss;
rt.Dump(oss);
EXPECT_NE(oss.str().find("(empty)"), std::string::npos) << oss.str();
EXPECT_EQ(0U, rt.Size());
}
// Check removal of all nullss in a empty table is a no-op.
rt.Remove(nullptr);
EXPECT_EQ(0U, rt.Size());
// Check removal of all o1 in a empty table is a no-op.
rt.Remove(o1);
EXPECT_EQ(0U, rt.Size());
// Add o1 and check we have 1 element and can dump.
{
rt.Add(o1);
EXPECT_EQ(1U, rt.Size());
std::ostringstream oss;
rt.Dump(oss);
EXPECT_NE(oss.str().find("1 of java.lang.String"), std::string::npos) << oss.str();
EXPECT_EQ(oss.str().find("short[]"), std::string::npos) << oss.str();
}
// Add a second object 10 times and check dumping is sane.
mirror::Object* o2 = mirror::ShortArray::Alloc(soa.Self(), 0);
for (size_t i = 0; i < 10; ++i) {
rt.Add(o2);
EXPECT_EQ(i + 2, rt.Size());
std::ostringstream oss;
rt.Dump(oss);
EXPECT_NE(oss.str().find(StringPrintf("Last %zd entries (of %zd):",
i + 2 > 10 ? 10 : i + 2,
i + 2)),
std::string::npos) << oss.str();
EXPECT_NE(oss.str().find("1 of java.lang.String"), std::string::npos) << oss.str();
if (i == 0) {
EXPECT_NE(oss.str().find("1 of short[]"), std::string::npos) << oss.str();
} else {
EXPECT_NE(oss.str().find(StringPrintf("%zd of short[] (1 unique instances)", i + 1)),
std::string::npos) << oss.str();
}
}
// Remove o1 (first element).
{
rt.Remove(o1);
EXPECT_EQ(10U, rt.Size());
std::ostringstream oss;
rt.Dump(oss);
EXPECT_EQ(oss.str().find("java.lang.String"), std::string::npos) << oss.str();
}
// Remove o2 ten times.
for (size_t i = 0; i < 10; ++i) {
rt.Remove(o2);
EXPECT_EQ(9 - i, rt.Size());
std::ostringstream oss;
rt.Dump(oss);
if (i == 9) {
EXPECT_EQ(oss.str().find("short[]"), std::string::npos) << oss.str();
} else if (i == 8) {
EXPECT_NE(oss.str().find("1 of short[]"), std::string::npos) << oss.str();
} else {
EXPECT_NE(oss.str().find(StringPrintf("%zd of short[] (1 unique instances)", 10 - i - 1)),
std::string::npos) << oss.str();
}
}
// Add a reference and check that the type of the referent is dumped.
{
mirror::Object* empty_reference = CreateWeakReference(nullptr);
ASSERT_TRUE(empty_reference->IsReferenceInstance());
rt.Add(empty_reference);
std::ostringstream oss;
rt.Dump(oss);
EXPECT_NE(oss.str().find("java.lang.ref.WeakReference (referent is null)"), std::string::npos)
<< oss.str();
}
{
mirror::Object* string_referent = mirror::String::AllocFromModifiedUtf8(Thread::Current(), "A");
mirror::Object* non_empty_reference = CreateWeakReference(string_referent);
ASSERT_TRUE(non_empty_reference->IsReferenceInstance());
rt.Add(non_empty_reference);
std::ostringstream oss;
rt.Dump(oss);
EXPECT_NE(oss.str().find("java.lang.ref.WeakReference (referent is a java.lang.String)"),
std::string::npos)
<< oss.str();
}
}
static std::vector<size_t> FindAll(const std::string& haystack, const char* needle) {
std::vector<size_t> res;
size_t start = 0;
do {
size_t pos = haystack.find(needle, start);
if (pos == std::string::npos) {
break;
}
res.push_back(pos);
start = pos + 1;
} while (start < haystack.size());
return res;
}
TEST_F(ReferenceTableTest, SummaryOrder) {
// Check that the summary statistics are sorted.
ScopedObjectAccess soa(Thread::Current());
ReferenceTable rt("test", 0, 20);
{
mirror::Object* s1 = mirror::String::AllocFromModifiedUtf8(soa.Self(), "hello");
mirror::Object* s2 = mirror::String::AllocFromModifiedUtf8(soa.Self(), "world");
// 3 copies of s1, 2 copies of s2, interleaved.
for (size_t i = 0; i != 2; ++i) {
rt.Add(s1);
rt.Add(s2);
}
rt.Add(s1);
}
{
// Differently sized byte arrays. Should be sorted by identical (non-unique cound).
mirror::Object* b1_1 = mirror::ByteArray::Alloc(soa.Self(), 1);
rt.Add(b1_1);
rt.Add(mirror::ByteArray::Alloc(soa.Self(), 2));
rt.Add(b1_1);
rt.Add(mirror::ByteArray::Alloc(soa.Self(), 2));
rt.Add(mirror::ByteArray::Alloc(soa.Self(), 1));
rt.Add(mirror::ByteArray::Alloc(soa.Self(), 2));
}
rt.Add(mirror::CharArray::Alloc(soa.Self(), 0));
// Now dump, and ensure order.
std::ostringstream oss;
rt.Dump(oss);
// Only do this on the part after Summary.
std::string base = oss.str();
size_t summary_pos = base.find("Summary:");
ASSERT_NE(summary_pos, std::string::npos);
std::string haystack = base.substr(summary_pos);
std::vector<size_t> strCounts = FindAll(haystack, "java.lang.String");
std::vector<size_t> b1Counts = FindAll(haystack, "byte[] (1 elements)");
std::vector<size_t> b2Counts = FindAll(haystack, "byte[] (2 elements)");
std::vector<size_t> cCounts = FindAll(haystack, "char[]");
// Only one each.
EXPECT_EQ(1u, strCounts.size());
EXPECT_EQ(1u, b1Counts.size());
EXPECT_EQ(1u, b2Counts.size());
EXPECT_EQ(1u, cCounts.size());
// Expect them to be in order.
EXPECT_LT(strCounts[0], b1Counts[0]);
EXPECT_LT(b1Counts[0], b2Counts[0]);
EXPECT_LT(b2Counts[0], cCounts[0]);
}
} // namespace art
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