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src/share/vm/gc/g1/heapRegionSet.cpp

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rev 11753 : 8159817: Convert FreeRegionList_test to GTest
Reviewed-by: duke


 353 }
 354 
 355 void HumongousRegionSetMtSafeChecker::check() {
 356   // Humongous Set MT safety protocol:
 357   // (a) If we're at a safepoint, operations on the master humongous
 358   // set should be invoked by either the VM thread (which will
 359   // serialize them) or by the GC workers while holding the
 360   // OldSets_lock.
 361   // (b) If we're not at a safepoint, operations on the master
 362   // humongous set should be invoked while holding the Heap_lock.
 363 
 364   if (SafepointSynchronize::is_at_safepoint()) {
 365     guarantee(Thread::current()->is_VM_thread() ||
 366               OldSets_lock->owned_by_self(),
 367               "master humongous set MT safety protocol at a safepoint");
 368   } else {
 369     guarantee(Heap_lock->owned_by_self(),
 370               "master humongous set MT safety protocol outside a safepoint");
 371   }
 372 }
 373 
 374 void FreeRegionList_test() {
 375   FreeRegionList l("test");
 376 
 377   const uint num_regions_in_test = 5;
 378   // Create a fake heap. It does not need to be valid, as the HeapRegion constructor
 379   // does not access it.
 380   MemRegion heap(NULL, num_regions_in_test * HeapRegion::GrainWords);
 381   // Allocate a fake BOT because the HeapRegion constructor initializes
 382   // the BOT.
 383   size_t bot_size = G1BlockOffsetTable::compute_size(heap.word_size());
 384   HeapWord* bot_data = NEW_C_HEAP_ARRAY(HeapWord, bot_size, mtGC);
 385   ReservedSpace bot_rs(G1BlockOffsetTable::compute_size(heap.word_size()));
 386   G1RegionToSpaceMapper* bot_storage =
 387     G1RegionToSpaceMapper::create_mapper(bot_rs,
 388                                          bot_rs.size(),
 389                                          os::vm_page_size(),
 390                                          HeapRegion::GrainBytes,
 391                                          BOTConstants::N_bytes,
 392                                          mtGC);
 393   G1BlockOffsetTable bot(heap, bot_storage);
 394   bot_storage->commit_regions(0, num_regions_in_test);
 395 
 396   // Set up memory regions for the heap regions.
 397   MemRegion mr0(heap.start(), HeapRegion::GrainWords);
 398   MemRegion mr1(mr0.end(), HeapRegion::GrainWords);
 399   MemRegion mr2(mr1.end(), HeapRegion::GrainWords);
 400   MemRegion mr3(mr2.end(), HeapRegion::GrainWords);
 401   MemRegion mr4(mr3.end(), HeapRegion::GrainWords);
 402 
 403   HeapRegion hr0(0, &bot, mr0);
 404   HeapRegion hr1(1, &bot, mr1);
 405   HeapRegion hr2(2, &bot, mr2);
 406   HeapRegion hr3(3, &bot, mr3);
 407   HeapRegion hr4(4, &bot, mr4);
 408   l.add_ordered(&hr1);
 409   l.add_ordered(&hr0);
 410   l.add_ordered(&hr3);
 411   l.add_ordered(&hr4);
 412   l.add_ordered(&hr2);
 413   assert(l.length() == num_regions_in_test, "wrong length");
 414   l.verify_list();
 415 
 416   bot_storage->uncommit_regions(0, num_regions_in_test);
 417   delete bot_storage;
 418   FREE_C_HEAP_ARRAY(HeapWord, bot_data);
 419 }


 353 }
 354 
 355 void HumongousRegionSetMtSafeChecker::check() {
 356   // Humongous Set MT safety protocol:
 357   // (a) If we're at a safepoint, operations on the master humongous
 358   // set should be invoked by either the VM thread (which will
 359   // serialize them) or by the GC workers while holding the
 360   // OldSets_lock.
 361   // (b) If we're not at a safepoint, operations on the master
 362   // humongous set should be invoked while holding the Heap_lock.
 363 
 364   if (SafepointSynchronize::is_at_safepoint()) {
 365     guarantee(Thread::current()->is_VM_thread() ||
 366               OldSets_lock->owned_by_self(),
 367               "master humongous set MT safety protocol at a safepoint");
 368   } else {
 369     guarantee(Heap_lock->owned_by_self(),
 370               "master humongous set MT safety protocol outside a safepoint");
 371   }
 372 }















































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