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Issue 543113: A simple test for map compact. (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 11 months ago
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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. 1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
2 // Redistribution and use in source and binary forms, with or without 2 // Redistribution and use in source and binary forms, with or without
3 // modification, are permitted provided that the following conditions are 3 // modification, are permitted provided that the following conditions are
4 // met: 4 // met:
5 // 5 //
6 // * Redistributions of source code must retain the above copyright 6 // * Redistributions of source code must retain the above copyright
7 // notice, this list of conditions and the following disclaimer. 7 // notice, this list of conditions and the following disclaimer.
8 // * Redistributions in binary form must reproduce the above 8 // * Redistributions in binary form must reproduce the above
9 // copyright notice, this list of conditions and the following 9 // copyright notice, this list of conditions and the following
10 // disclaimer in the documentation and/or other materials provided 10 // disclaimer in the documentation and/or other materials provided
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200 200
201 obj_name = String::cast(Heap::LookupAsciiSymbol("theObject")); 201 obj_name = String::cast(Heap::LookupAsciiSymbol("theObject"));
202 CHECK(Top::context()->global()->HasLocalProperty(obj_name)); 202 CHECK(Top::context()->global()->HasLocalProperty(obj_name));
203 CHECK(Top::context()->global()->GetProperty(obj_name)->IsJSObject()); 203 CHECK(Top::context()->global()->GetProperty(obj_name)->IsJSObject());
204 obj = JSObject::cast(Top::context()->global()->GetProperty(obj_name)); 204 obj = JSObject::cast(Top::context()->global()->GetProperty(obj_name));
205 prop_name = String::cast(Heap::LookupAsciiSymbol("theSlot")); 205 prop_name = String::cast(Heap::LookupAsciiSymbol("theSlot"));
206 CHECK(obj->GetProperty(prop_name) == Smi::FromInt(23)); 206 CHECK(obj->GetProperty(prop_name) == Smi::FromInt(23));
207 } 207 }
208 208
209 209
210 static Handle<Map> CreateMap() {
211 return Factory::NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
212 }
213
214
215 TEST(MapCompact) {
216 FLAG_max_map_space_pages = 16;
217 InitializeVM();
218
219 {
220 v8::HandleScope sc;
221 // keep allocating maps while pointers are still encodable and thus
222 // mark compact is permitted.
223 Handle<JSObject> root = Factory::NewJSObjectFromMap(CreateMap());
224 do {
225 Handle<Map> map = CreateMap();
226 map->set_prototype(*root);
227 root = Factory::NewJSObjectFromMap(map);
228 } while (Heap::map_space()->MapPointersEncodable());
229 }
230 // Now, as we don't have any handles to just allocated maps, we should
231 // be able to trigger map compaction.
232 // To give an additional chance to fail, try to force compaction which
233 // should be impossible right now.
234 Heap::CollectAllGarbage(true);
235 // And now map pointers should be encodable again.
236 CHECK(Heap::map_space()->MapPointersEncodable());
237 }
238
239
210 static int gc_starts = 0; 240 static int gc_starts = 0;
211 static int gc_ends = 0; 241 static int gc_ends = 0;
212 242
213 static void GCPrologueCallbackFunc() { 243 static void GCPrologueCallbackFunc() {
214 CHECK(gc_starts == gc_ends); 244 CHECK(gc_starts == gc_ends);
215 gc_starts++; 245 gc_starts++;
216 } 246 }
217 247
218 248
219 static void GCEpilogueCallbackFunc() { 249 static void GCEpilogueCallbackFunc() {
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302 Object** g2_objects[] = { g2s1.location(), g2s2.location() }; 332 Object** g2_objects[] = { g2s1.location(), g2s2.location() };
303 GlobalHandles::AddGroup(g1_objects, 2); 333 GlobalHandles::AddGroup(g1_objects, 2);
304 GlobalHandles::AddGroup(g2_objects, 2); 334 GlobalHandles::AddGroup(g2_objects, 2);
305 } 335 }
306 336
307 CHECK(Heap::CollectGarbage(0, OLD_POINTER_SPACE)); 337 CHECK(Heap::CollectGarbage(0, OLD_POINTER_SPACE));
308 338
309 // All objects should be gone. 5 global handles in total. 339 // All objects should be gone. 5 global handles in total.
310 CHECK_EQ(5, NumberOfWeakCalls); 340 CHECK_EQ(5, NumberOfWeakCalls);
311 } 341 }
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