v8/test/cctest/test-dictionary.cc
2014-08-22 11:09:13 +00:00

255 lines
8.8 KiB
C++

// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/v8.h"
#include "test/cctest/cctest.h"
#include "src/api.h"
#include "src/debug.h"
#include "src/execution.h"
#include "src/factory.h"
#include "src/global-handles.h"
#include "src/macro-assembler.h"
#include "src/objects.h"
using namespace v8::internal;
namespace {
template<typename HashMap>
static void TestHashMap(Handle<HashMap> table) {
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<JSObject> a = factory->NewJSArray(7);
Handle<JSObject> b = factory->NewJSArray(11);
table = HashMap::Put(table, a, b);
CHECK_EQ(table->NumberOfElements(), 1);
CHECK_EQ(table->Lookup(a), *b);
// When the key does not exist in the map, Lookup returns the hole.
CHECK_EQ(table->Lookup(b), CcTest::heap()->the_hole_value());
// Keys still have to be valid after objects were moved.
CcTest::heap()->CollectGarbage(NEW_SPACE);
CHECK_EQ(table->NumberOfElements(), 1);
CHECK_EQ(table->Lookup(a), *b);
CHECK_EQ(table->Lookup(b), CcTest::heap()->the_hole_value());
// Keys that are overwritten should not change number of elements.
table = HashMap::Put(table, a, factory->NewJSArray(13));
CHECK_EQ(table->NumberOfElements(), 1);
CHECK_NE(table->Lookup(a), *b);
// Keys that have been removed are mapped to the hole.
bool was_present = false;
table = HashMap::Remove(table, a, &was_present);
CHECK(was_present);
CHECK_EQ(table->NumberOfElements(), 0);
CHECK_EQ(table->Lookup(a), CcTest::heap()->the_hole_value());
// Keys should map back to their respective values and also should get
// an identity hash code generated.
for (int i = 0; i < 100; i++) {
Handle<JSReceiver> key = factory->NewJSArray(7);
Handle<JSObject> value = factory->NewJSArray(11);
table = HashMap::Put(table, key, value);
CHECK_EQ(table->NumberOfElements(), i + 1);
CHECK_NE(table->FindEntry(key), HashMap::kNotFound);
CHECK_EQ(table->Lookup(key), *value);
CHECK(key->GetIdentityHash()->IsSmi());
}
// Keys never added to the map which already have an identity hash
// code should not be found.
for (int i = 0; i < 100; i++) {
Handle<JSReceiver> key = factory->NewJSArray(7);
CHECK(JSReceiver::GetOrCreateIdentityHash(key)->IsSmi());
CHECK_EQ(table->FindEntry(key), HashMap::kNotFound);
CHECK_EQ(table->Lookup(key), CcTest::heap()->the_hole_value());
CHECK(key->GetIdentityHash()->IsSmi());
}
// Keys that don't have an identity hash should not be found and also
// should not get an identity hash code generated.
for (int i = 0; i < 100; i++) {
Handle<JSReceiver> key = factory->NewJSArray(7);
CHECK_EQ(table->Lookup(key), CcTest::heap()->the_hole_value());
Object* identity_hash = key->GetIdentityHash();
CHECK_EQ(identity_hash, CcTest::heap()->undefined_value());
}
}
TEST(HashMap) {
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
TestHashMap(ObjectHashTable::New(isolate, 23));
TestHashMap(isolate->factory()->NewOrderedHashMap());
}
class ObjectHashTableTest: public ObjectHashTable {
public:
void insert(int entry, int key, int value) {
set(EntryToIndex(entry), Smi::FromInt(key));
set(EntryToIndex(entry) + 1, Smi::FromInt(value));
}
int lookup(int key) {
Handle<Object> key_obj(Smi::FromInt(key), GetIsolate());
return Smi::cast(Lookup(key_obj))->value();
}
int capacity() {
return Capacity();
}
};
TEST(HashTableRehash) {
LocalContext context;
Isolate* isolate = CcTest::i_isolate();
v8::HandleScope scope(context->GetIsolate());
// Test almost filled table.
{
Handle<ObjectHashTable> table = ObjectHashTable::New(isolate, 100);
ObjectHashTableTest* t = reinterpret_cast<ObjectHashTableTest*>(*table);
int capacity = t->capacity();
for (int i = 0; i < capacity - 1; i++) {
t->insert(i, i * i, i);
}
t->Rehash(handle(Smi::FromInt(0), isolate));
for (int i = 0; i < capacity - 1; i++) {
CHECK_EQ(i, t->lookup(i * i));
}
}
// Test half-filled table.
{
Handle<ObjectHashTable> table = ObjectHashTable::New(isolate, 100);
ObjectHashTableTest* t = reinterpret_cast<ObjectHashTableTest*>(*table);
int capacity = t->capacity();
for (int i = 0; i < capacity / 2; i++) {
t->insert(i, i * i, i);
}
t->Rehash(handle(Smi::FromInt(0), isolate));
for (int i = 0; i < capacity / 2; i++) {
CHECK_EQ(i, t->lookup(i * i));
}
}
}
#ifdef DEBUG
template<class HashSet>
static void TestHashSetCausesGC(Handle<HashSet> table) {
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<JSObject> key = factory->NewJSArray(0);
v8::Handle<v8::Object> key_obj = v8::Utils::ToLocal(key);
// Force allocation of hash table backing store for hidden properties.
key_obj->SetHiddenValue(v8_str("key 1"), v8_str("val 1"));
key_obj->SetHiddenValue(v8_str("key 2"), v8_str("val 2"));
key_obj->SetHiddenValue(v8_str("key 3"), v8_str("val 3"));
// Simulate a full heap so that generating an identity hash code
// in subsequent calls will request GC.
SimulateFullSpace(CcTest::heap()->new_space());
SimulateFullSpace(CcTest::heap()->old_pointer_space());
// Calling Contains() should not cause GC ever.
int gc_count = isolate->heap()->gc_count();
CHECK(!table->Contains(key));
CHECK(gc_count == isolate->heap()->gc_count());
// Calling Remove() will not cause GC in this case.
bool was_present = false;
table = HashSet::Remove(table, key, &was_present);
CHECK(!was_present);
CHECK(gc_count == isolate->heap()->gc_count());
// Calling Add() should cause GC.
table = HashSet::Add(table, key);
CHECK(gc_count < isolate->heap()->gc_count());
}
TEST(ObjectHashSetCausesGC) {
i::FLAG_stress_compaction = false;
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
TestHashSetCausesGC(isolate->factory()->NewOrderedHashSet());
}
#endif
#ifdef DEBUG
template<class HashMap>
static void TestHashMapCausesGC(Handle<HashMap> table) {
Isolate* isolate = CcTest::i_isolate();
Factory* factory = isolate->factory();
Handle<JSObject> key = factory->NewJSArray(0);
v8::Handle<v8::Object> key_obj = v8::Utils::ToLocal(key);
// Force allocation of hash table backing store for hidden properties.
key_obj->SetHiddenValue(v8_str("key 1"), v8_str("val 1"));
key_obj->SetHiddenValue(v8_str("key 2"), v8_str("val 2"));
key_obj->SetHiddenValue(v8_str("key 3"), v8_str("val 3"));
// Simulate a full heap so that generating an identity hash code
// in subsequent calls will request GC.
SimulateFullSpace(CcTest::heap()->new_space());
SimulateFullSpace(CcTest::heap()->old_pointer_space());
// Calling Lookup() should not cause GC ever.
CHECK(table->Lookup(key)->IsTheHole());
// Calling Put() should request GC by returning a failure.
int gc_count = isolate->heap()->gc_count();
HashMap::Put(table, key, key);
CHECK(gc_count < isolate->heap()->gc_count());
}
TEST(ObjectHashTableCausesGC) {
i::FLAG_stress_compaction = false;
LocalContext context;
v8::HandleScope scope(context->GetIsolate());
Isolate* isolate = CcTest::i_isolate();
TestHashMapCausesGC(ObjectHashTable::New(isolate, 1));
TestHashMapCausesGC(isolate->factory()->NewOrderedHashMap());
}
#endif
}