src/indirect_reference_table_test.cc - platform/art - Gitiles

 /*
  * Copyright (C) 2009 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 "common_test.h"

 #include "indirect_reference_table.h"

 namespace art {

 class IndirectReferenceTableTest : public CommonTest {
 };

 static void CheckDump(IndirectReferenceTable* irt, size_t num_objects, size_t num_unique)
     SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
   std::ostringstream oss;
   irt->Dump(oss);
   if (num_objects == 0) {
     EXPECT_EQ(oss.str().find("java.lang.Object"), std::string::npos) << oss.str();
   } else if (num_objects == 1) {
     EXPECT_NE(oss.str().find("1 of java.lang.Object"), std::string::npos) << oss.str();
   } else {
     EXPECT_NE(oss.str().find(StringPrintf("%zd of java.lang.Object (%zd unique instances)",
                                           num_objects, num_unique)),
               std::string::npos)
                   << "\n Expected number of objects: " << num_objects
                   << "\n Expected unique objects: " << num_unique << "\n"
                   << oss.str();
   }
 }

 TEST_F(IndirectReferenceTableTest, BasicTest) {
   ScopedObjectAccess soa(Thread::Current());
   static const size_t kTableInitial = 10;
   static const size_t kTableMax = 20;
   IndirectReferenceTable irt(kTableInitial, kTableMax, kGlobal);

   Class* c = class_linker_->FindSystemClass("Ljava/lang/Object;");
   ASSERT_TRUE(c != NULL);
   Object* obj0 = c->AllocObject(soa.Self());
   ASSERT_TRUE(obj0 != NULL);
   Object* obj1 = c->AllocObject(soa.Self());
   ASSERT_TRUE(obj1 != NULL);
   Object* obj2 = c->AllocObject(soa.Self());
   ASSERT_TRUE(obj2 != NULL);
   Object* obj3 = c->AllocObject(soa.Self());
   ASSERT_TRUE(obj3 != NULL);

   const uint32_t cookie = IRT_FIRST_SEGMENT;

   CheckDump(&irt, 0, 0);

   IndirectRef iref0 = (IndirectRef) 0x11110;
   EXPECT_FALSE(irt.Remove(cookie, iref0)) << "unexpectedly successful removal";

   // Add three, check, remove in the order in which they were added.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   CheckDump(&irt, 1, 1);
   IndirectRef iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);
   CheckDump(&irt, 2, 2);
   IndirectRef iref2 = irt.Add(cookie, obj2);
   EXPECT_TRUE(iref2 != NULL);
   CheckDump(&irt, 3, 3);

   EXPECT_EQ(obj0, irt.Get(iref0));
   EXPECT_EQ(obj1, irt.Get(iref1));
   EXPECT_EQ(obj2, irt.Get(iref2));

   EXPECT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 2, 2);
   EXPECT_TRUE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 1, 1);
   EXPECT_TRUE(irt.Remove(cookie, iref2));
   CheckDump(&irt, 0, 0);

   // Table should be empty now.
   EXPECT_EQ(0U, irt.Capacity());

   // Get invalid entry (off the end of the list).
   EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref0));

   // Add three, remove in the opposite order.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);
   iref2 = irt.Add(cookie, obj2);
   EXPECT_TRUE(iref2 != NULL);
   CheckDump(&irt, 3, 3);

   ASSERT_TRUE(irt.Remove(cookie, iref2));
   CheckDump(&irt, 2, 2);
   ASSERT_TRUE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 0, 0);

   // Table should be empty now.
   ASSERT_EQ(0U, irt.Capacity());

   // Add three, remove middle / middle / bottom / top.  (Second attempt
   // to remove middle should fail.)
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);
   iref2 = irt.Add(cookie, obj2);
   EXPECT_TRUE(iref2 != NULL);
   CheckDump(&irt, 3, 3);

   ASSERT_EQ(3U, irt.Capacity());

   ASSERT_TRUE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 2, 2);
   ASSERT_FALSE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 2, 2);

   // Get invalid entry (from hole).
   EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref1));

   ASSERT_TRUE(irt.Remove(cookie, iref2));
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 0, 0);

   // Table should be empty now.
   ASSERT_EQ(0U, irt.Capacity());

   // Add four entries.  Remove #1, add new entry, verify that table size
   // is still 4 (i.e. holes are getting filled).  Remove #1 and #3, verify
   // that we delete one and don't hole-compact the other.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);
   iref2 = irt.Add(cookie, obj2);
   EXPECT_TRUE(iref2 != NULL);
   IndirectRef iref3 = irt.Add(cookie, obj3);
   EXPECT_TRUE(iref3 != NULL);
   CheckDump(&irt, 4, 4);

   ASSERT_TRUE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 3, 3);

   iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);

   ASSERT_EQ(4U, irt.Capacity()) << "hole not filled";
   CheckDump(&irt, 4, 4);

   ASSERT_TRUE(irt.Remove(cookie, iref1));
   CheckDump(&irt, 3, 3);
   ASSERT_TRUE(irt.Remove(cookie, iref3));
   CheckDump(&irt, 2, 2);

   ASSERT_EQ(3U, irt.Capacity()) << "should be 3 after two deletions";

   ASSERT_TRUE(irt.Remove(cookie, iref2));
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 0, 0);

   ASSERT_EQ(0U, irt.Capacity()) << "not empty after split remove";

   // Add an entry, remove it, add a new entry, and try to use the original
   // iref.  They have the same slot number but are for different objects.
   // With the extended checks in place, this should fail.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 0, 0);
   iref1 = irt.Add(cookie, obj1);
   EXPECT_TRUE(iref1 != NULL);
   CheckDump(&irt, 1, 1);
   ASSERT_FALSE(irt.Remove(cookie, iref0)) << "mismatched del succeeded";
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref1)) << "switched del failed";
   ASSERT_EQ(0U, irt.Capacity()) << "switching del not empty";
   CheckDump(&irt, 0, 0);

   // Same as above, but with the same object.  A more rigorous checker
   // (e.g. with slot serialization) will catch this.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   CheckDump(&irt, 0, 0);
   iref1 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref1 != NULL);
   CheckDump(&irt, 1, 1);
   if (iref0 != iref1) {
     // Try 0, should not work.
     ASSERT_FALSE(irt.Remove(cookie, iref0)) << "temporal del succeeded";
   }
   ASSERT_TRUE(irt.Remove(cookie, iref1)) << "temporal cleanup failed";
   ASSERT_EQ(0U, irt.Capacity()) << "temporal del not empty";
   CheckDump(&irt, 0, 0);

   // NULL isn't a valid iref.
   ASSERT_EQ(kInvalidIndirectRefObject, irt.Get(NULL));

   // Stale lookup.
   iref0 = irt.Add(cookie, obj0);
   EXPECT_TRUE(iref0 != NULL);
   CheckDump(&irt, 1, 1);
   ASSERT_TRUE(irt.Remove(cookie, iref0));
   EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref0)) << "stale lookup succeeded";
   CheckDump(&irt, 0, 0);

   // Test table resizing.
   // These ones fit...
   IndirectRef manyRefs[kTableInitial];
   for (size_t i = 0; i < kTableInitial; i++) {
     manyRefs[i] = irt.Add(cookie, obj0);
     ASSERT_TRUE(manyRefs[i] != NULL) << "Failed adding " << i;
     CheckDump(&irt, i + 1, 1);
   }
   // ...this one causes overflow.
   iref0 = irt.Add(cookie, obj0);
   ASSERT_TRUE(iref0 != NULL);
   ASSERT_EQ(kTableInitial + 1, irt.Capacity());
   CheckDump(&irt, kTableInitial + 1, 1);

   for (size_t i = 0; i < kTableInitial; i++) {
     ASSERT_TRUE(irt.Remove(cookie, manyRefs[i])) << "failed removing " << i;
     CheckDump(&irt, kTableInitial - i, 1);
   }
   // Because of removal order, should have 11 entries, 10 of them holes.
   ASSERT_EQ(kTableInitial + 1, irt.Capacity());

   ASSERT_TRUE(irt.Remove(cookie, iref0)) << "multi-remove final failed";

   ASSERT_EQ(0U, irt.Capacity()) << "multi-del not empty";
   CheckDump(&irt, 0, 0);
 }

 }  // namespace art
	/*
	* Copyright (C) 2009 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 "common_test.h"

	#include "indirect_reference_table.h"

	namespace art {

	class IndirectReferenceTableTest : public CommonTest {
	};

	static void CheckDump(IndirectReferenceTable* irt, size_t num_objects, size_t num_unique)
	SHARED_LOCKS_REQUIRED(Locks::mutator_lock_) {
	std::ostringstream oss;
	irt->Dump(oss);
	if (num_objects == 0) {
	EXPECT_EQ(oss.str().find("java.lang.Object"), std::string::npos) << oss.str();
	} else if (num_objects == 1) {
	EXPECT_NE(oss.str().find("1 of java.lang.Object"), std::string::npos) << oss.str();
	} else {
	EXPECT_NE(oss.str().find(StringPrintf("%zd of java.lang.Object (%zd unique instances)",
	num_objects, num_unique)),
	std::string::npos)
	<< "\n Expected number of objects: " << num_objects
	<< "\n Expected unique objects: " << num_unique << "\n"
	<< oss.str();
	}
	}

	TEST_F(IndirectReferenceTableTest, BasicTest) {
	ScopedObjectAccess soa(Thread::Current());
	static const size_t kTableInitial = 10;
	static const size_t kTableMax = 20;
	IndirectReferenceTable irt(kTableInitial, kTableMax, kGlobal);

	Class* c = class_linker_->FindSystemClass("Ljava/lang/Object;");
	ASSERT_TRUE(c != NULL);
	Object* obj0 = c->AllocObject(soa.Self());
	ASSERT_TRUE(obj0 != NULL);
	Object* obj1 = c->AllocObject(soa.Self());
	ASSERT_TRUE(obj1 != NULL);
	Object* obj2 = c->AllocObject(soa.Self());
	ASSERT_TRUE(obj2 != NULL);
	Object* obj3 = c->AllocObject(soa.Self());
	ASSERT_TRUE(obj3 != NULL);

	const uint32_t cookie = IRT_FIRST_SEGMENT;

	CheckDump(&irt, 0, 0);

	IndirectRef iref0 = (IndirectRef) 0x11110;
	EXPECT_FALSE(irt.Remove(cookie, iref0)) << "unexpectedly successful removal";

	// Add three, check, remove in the order in which they were added.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	CheckDump(&irt, 1, 1);
	IndirectRef iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);
	CheckDump(&irt, 2, 2);
	IndirectRef iref2 = irt.Add(cookie, obj2);
	EXPECT_TRUE(iref2 != NULL);
	CheckDump(&irt, 3, 3);

	EXPECT_EQ(obj0, irt.Get(iref0));
	EXPECT_EQ(obj1, irt.Get(iref1));
	EXPECT_EQ(obj2, irt.Get(iref2));

	EXPECT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 2, 2);
	EXPECT_TRUE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 1, 1);
	EXPECT_TRUE(irt.Remove(cookie, iref2));
	CheckDump(&irt, 0, 0);

	// Table should be empty now.
	EXPECT_EQ(0U, irt.Capacity());

	// Get invalid entry (off the end of the list).
	EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref0));

	// Add three, remove in the opposite order.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);
	iref2 = irt.Add(cookie, obj2);
	EXPECT_TRUE(iref2 != NULL);
	CheckDump(&irt, 3, 3);

	ASSERT_TRUE(irt.Remove(cookie, iref2));
	CheckDump(&irt, 2, 2);
	ASSERT_TRUE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 0, 0);

	// Table should be empty now.
	ASSERT_EQ(0U, irt.Capacity());

	// Add three, remove middle / middle / bottom / top. (Second attempt
	// to remove middle should fail.)
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);
	iref2 = irt.Add(cookie, obj2);
	EXPECT_TRUE(iref2 != NULL);
	CheckDump(&irt, 3, 3);

	ASSERT_EQ(3U, irt.Capacity());

	ASSERT_TRUE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 2, 2);
	ASSERT_FALSE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 2, 2);

	// Get invalid entry (from hole).
	EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref1));

	ASSERT_TRUE(irt.Remove(cookie, iref2));
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 0, 0);

	// Table should be empty now.
	ASSERT_EQ(0U, irt.Capacity());

	// Add four entries. Remove #1, add new entry, verify that table size
	// is still 4 (i.e. holes are getting filled). Remove #1 and #3, verify
	// that we delete one and don't hole-compact the other.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);
	iref2 = irt.Add(cookie, obj2);
	EXPECT_TRUE(iref2 != NULL);
	IndirectRef iref3 = irt.Add(cookie, obj3);
	EXPECT_TRUE(iref3 != NULL);
	CheckDump(&irt, 4, 4);

	ASSERT_TRUE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 3, 3);

	iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);

	ASSERT_EQ(4U, irt.Capacity()) << "hole not filled";
	CheckDump(&irt, 4, 4);

	ASSERT_TRUE(irt.Remove(cookie, iref1));
	CheckDump(&irt, 3, 3);
	ASSERT_TRUE(irt.Remove(cookie, iref3));
	CheckDump(&irt, 2, 2);

	ASSERT_EQ(3U, irt.Capacity()) << "should be 3 after two deletions";

	ASSERT_TRUE(irt.Remove(cookie, iref2));
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 0, 0);

	ASSERT_EQ(0U, irt.Capacity()) << "not empty after split remove";

	// Add an entry, remove it, add a new entry, and try to use the original
	// iref. They have the same slot number but are for different objects.
	// With the extended checks in place, this should fail.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 0, 0);
	iref1 = irt.Add(cookie, obj1);
	EXPECT_TRUE(iref1 != NULL);
	CheckDump(&irt, 1, 1);
	ASSERT_FALSE(irt.Remove(cookie, iref0)) << "mismatched del succeeded";
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref1)) << "switched del failed";
	ASSERT_EQ(0U, irt.Capacity()) << "switching del not empty";
	CheckDump(&irt, 0, 0);

	// Same as above, but with the same object. A more rigorous checker
	// (e.g. with slot serialization) will catch this.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	CheckDump(&irt, 0, 0);
	iref1 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref1 != NULL);
	CheckDump(&irt, 1, 1);
	if (iref0 != iref1) {
	// Try 0, should not work.
	ASSERT_FALSE(irt.Remove(cookie, iref0)) << "temporal del succeeded";
	}
	ASSERT_TRUE(irt.Remove(cookie, iref1)) << "temporal cleanup failed";
	ASSERT_EQ(0U, irt.Capacity()) << "temporal del not empty";
	CheckDump(&irt, 0, 0);

	// NULL isn't a valid iref.
	ASSERT_EQ(kInvalidIndirectRefObject, irt.Get(NULL));

	// Stale lookup.
	iref0 = irt.Add(cookie, obj0);
	EXPECT_TRUE(iref0 != NULL);
	CheckDump(&irt, 1, 1);
	ASSERT_TRUE(irt.Remove(cookie, iref0));
	EXPECT_EQ(kInvalidIndirectRefObject, irt.Get(iref0)) << "stale lookup succeeded";
	CheckDump(&irt, 0, 0);

	// Test table resizing.
	// These ones fit...
	IndirectRef manyRefs[kTableInitial];
	for (size_t i = 0; i < kTableInitial; i++) {
	manyRefs[i] = irt.Add(cookie, obj0);
	ASSERT_TRUE(manyRefs[i] != NULL) << "Failed adding " << i;
	CheckDump(&irt, i + 1, 1);
	}
	// ...this one causes overflow.
	iref0 = irt.Add(cookie, obj0);
	ASSERT_TRUE(iref0 != NULL);
	ASSERT_EQ(kTableInitial + 1, irt.Capacity());
	CheckDump(&irt, kTableInitial + 1, 1);

	for (size_t i = 0; i < kTableInitial; i++) {
	ASSERT_TRUE(irt.Remove(cookie, manyRefs[i])) << "failed removing " << i;
	CheckDump(&irt, kTableInitial - i, 1);
	}
	// Because of removal order, should have 11 entries, 10 of them holes.
	ASSERT_EQ(kTableInitial + 1, irt.Capacity());

	ASSERT_TRUE(irt.Remove(cookie, iref0)) << "multi-remove final failed";

	ASSERT_EQ(0U, irt.Capacity()) << "multi-del not empty";
	CheckDump(&irt, 0, 0);
	}

	} // namespace art