Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #include "v8.h" |
| 29 | |
| 30 | #include "global-handles.h" |
| 31 | #include "snapshot.h" |
| 32 | #include "cctest.h" |
| 33 | |
| 34 | using namespace v8::internal; |
| 35 | |
| 36 | |
| 37 | static Handle<JSWeakMap> AllocateJSWeakMap() { |
| 38 | Handle<Map> map = FACTORY->NewMap(JS_WEAK_MAP_TYPE, JSWeakMap::kSize); |
| 39 | Handle<JSObject> weakmap_obj = FACTORY->NewJSObjectFromMap(map); |
| 40 | Handle<JSWeakMap> weakmap(JSWeakMap::cast(*weakmap_obj)); |
| 41 | // Do not use handles for the hash table, it would make entries strong. |
| 42 | Object* table_obj = ObjectHashTable::Allocate(1)->ToObjectChecked(); |
| 43 | ObjectHashTable* table = ObjectHashTable::cast(table_obj); |
| 44 | weakmap->set_table(table); |
| 45 | weakmap->set_next(Smi::FromInt(0)); |
| 46 | return weakmap; |
| 47 | } |
| 48 | |
| 49 | static void PutIntoWeakMap(Handle<JSWeakMap> weakmap, |
| 50 | Handle<JSObject> key, |
| 51 | int value) { |
| 52 | Handle<ObjectHashTable> table = PutIntoObjectHashTable( |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 53 | Handle<ObjectHashTable>(ObjectHashTable::cast(weakmap->table())), |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 54 | Handle<JSObject>(JSObject::cast(*key)), |
| 55 | Handle<Smi>(Smi::FromInt(value))); |
| 56 | weakmap->set_table(*table); |
| 57 | } |
| 58 | |
| 59 | static int NumberOfWeakCalls = 0; |
| 60 | static void WeakPointerCallback(v8::Persistent<v8::Value> handle, void* id) { |
| 61 | ASSERT(id == reinterpret_cast<void*>(1234)); |
| 62 | NumberOfWeakCalls++; |
| 63 | handle.Dispose(); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | TEST(Weakness) { |
| 68 | LocalContext context; |
| 69 | v8::HandleScope scope; |
| 70 | Handle<JSWeakMap> weakmap = AllocateJSWeakMap(); |
| 71 | GlobalHandles* global_handles = Isolate::Current()->global_handles(); |
| 72 | |
| 73 | // Keep global reference to the key. |
| 74 | Handle<Object> key; |
| 75 | { |
| 76 | v8::HandleScope scope; |
| 77 | Handle<Map> map = FACTORY->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| 78 | Handle<JSObject> object = FACTORY->NewJSObjectFromMap(map); |
| 79 | key = global_handles->Create(*object); |
| 80 | } |
| 81 | CHECK(!global_handles->IsWeak(key.location())); |
| 82 | |
| 83 | // Put entry into weak map. |
| 84 | { |
| 85 | v8::HandleScope scope; |
| 86 | PutIntoWeakMap(weakmap, Handle<JSObject>(JSObject::cast(*key)), 23); |
| 87 | } |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 88 | CHECK_EQ(1, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 89 | |
| 90 | // Force a full GC. |
| 91 | HEAP->CollectAllGarbage(false); |
| 92 | CHECK_EQ(0, NumberOfWeakCalls); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 93 | CHECK_EQ(1, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
| 94 | CHECK_EQ( |
| 95 | 0, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 96 | |
| 97 | // Make the global reference to the key weak. |
| 98 | { |
| 99 | v8::HandleScope scope; |
| 100 | global_handles->MakeWeak(key.location(), |
| 101 | reinterpret_cast<void*>(1234), |
| 102 | &WeakPointerCallback); |
| 103 | } |
| 104 | CHECK(global_handles->IsWeak(key.location())); |
| 105 | |
| 106 | // Force a full GC. |
| 107 | // Perform two consecutive GCs because the first one will only clear |
| 108 | // weak references whereas the second one will also clear weak maps. |
| 109 | HEAP->CollectAllGarbage(false); |
| 110 | CHECK_EQ(1, NumberOfWeakCalls); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 111 | CHECK_EQ(1, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
| 112 | CHECK_EQ( |
| 113 | 0, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 114 | HEAP->CollectAllGarbage(false); |
| 115 | CHECK_EQ(1, NumberOfWeakCalls); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 116 | CHECK_EQ(0, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
| 117 | CHECK_EQ( |
| 118 | 1, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 119 | } |
| 120 | |
| 121 | |
| 122 | TEST(Shrinking) { |
| 123 | LocalContext context; |
| 124 | v8::HandleScope scope; |
| 125 | Handle<JSWeakMap> weakmap = AllocateJSWeakMap(); |
| 126 | |
| 127 | // Check initial capacity. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 128 | CHECK_EQ(32, ObjectHashTable::cast(weakmap->table())->Capacity()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 129 | |
| 130 | // Fill up weak map to trigger capacity change. |
| 131 | { |
| 132 | v8::HandleScope scope; |
| 133 | Handle<Map> map = FACTORY->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| 134 | for (int i = 0; i < 32; i++) { |
| 135 | Handle<JSObject> object = FACTORY->NewJSObjectFromMap(map); |
| 136 | PutIntoWeakMap(weakmap, object, i); |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | // Check increased capacity. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 141 | CHECK_EQ(128, ObjectHashTable::cast(weakmap->table())->Capacity()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 142 | |
| 143 | // Force a full GC. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 144 | CHECK_EQ(32, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
| 145 | CHECK_EQ( |
| 146 | 0, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 147 | HEAP->CollectAllGarbage(false); |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 148 | CHECK_EQ(0, ObjectHashTable::cast(weakmap->table())->NumberOfElements()); |
| 149 | CHECK_EQ( |
| 150 | 32, ObjectHashTable::cast(weakmap->table())->NumberOfDeletedElements()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 151 | |
| 152 | // Check shrunk capacity. |
Ben Murdoch | 3ef787d | 2012-04-12 10:51:47 +0100 | [diff] [blame^] | 153 | CHECK_EQ(32, ObjectHashTable::cast(weakmap->table())->Capacity()); |
Ben Murdoch | 69a99ed | 2011-11-30 16:03:39 +0000 | [diff] [blame] | 154 | } |