154       VerifyBeforeGC) {
 155     old_gen->verify_object_start_array();
 156   }
 157 
 158   heap->pre_full_gc_dump(_gc_timer);
 159 
 160   // Filled in below to track the state of the young gen after the collection.
 161   bool eden_empty;
 162   bool survivors_empty;
 163   bool young_gen_empty;
 164 
 165   {
 166     HandleMark hm;
 167 
 168     gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
 169     TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
 170     GCTraceTime t1(GCCauseString("Full GC", gc_cause), PrintGC, !PrintGCDetails, NULL);
 171     TraceCollectorStats tcs(counters());
 172     TraceMemoryManagerStats tms(true /* Full GC */,gc_cause);
 173 
 174     if (TraceGen1Time) accumulated_time()->start();
 175 
 176     // Let the size policy know we're starting
 177     size_policy->major_collection_begin();
 178 
 179     CodeCache::gc_prologue();
 180     Threads::gc_prologue();
 181     BiasedLocking::preserve_marks();
 182 
 183     // Capture heap size before collection for printing.
 184     size_t prev_used = heap->used();
 185 
 186     // Capture metadata size before collection for sizing.
 187     size_t metadata_prev_used = MetaspaceAux::used_bytes();
 188 
 189     // For PrintGCDetails
 190     size_t old_gen_prev_used = old_gen->used_in_bytes();
 191     size_t young_gen_prev_used = young_gen->used_in_bytes();
 192 
 193     allocate_stacks();
 194 

 334       }
 335       if (PrintAdaptiveSizePolicy) {
 336         gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
 337                        heap->total_collections());
 338       }
 339     }
 340 
 341     if (UsePerfData) {
 342       heap->gc_policy_counters()->update_counters();
 343       heap->gc_policy_counters()->update_old_capacity(
 344         old_gen->capacity_in_bytes());
 345       heap->gc_policy_counters()->update_young_capacity(
 346         young_gen->capacity_in_bytes());
 347     }
 348 
 349     heap->resize_all_tlabs();
 350 
 351     // We collected the heap, recalculate the metaspace capacity
 352     MetaspaceGC::compute_new_size();
 353 
 354     if (TraceGen1Time) accumulated_time()->stop();
 355 
 356     if (PrintGC) {
 357       if (PrintGCDetails) {
 358         // Don't print a GC timestamp here.  This is after the GC so
 359         // would be confusing.
 360         young_gen->print_used_change(young_gen_prev_used);
 361         old_gen->print_used_change(old_gen_prev_used);
 362       }
 363       heap->print_heap_change(prev_used);
 364       if (PrintGCDetails) {
 365         MetaspaceAux::print_metaspace_change(metadata_prev_used);
 366       }
 367     }
 368 
 369     // Track memory usage and detect low memory
 370     MemoryService::track_memory_usage();
 371     heap->update_counters();
 372   }
 373 
 374   if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {

 154       VerifyBeforeGC) {
 155     old_gen->verify_object_start_array();
 156   }
 157 
 158   heap->pre_full_gc_dump(_gc_timer);
 159 
 160   // Filled in below to track the state of the young gen after the collection.
 161   bool eden_empty;
 162   bool survivors_empty;
 163   bool young_gen_empty;
 164 
 165   {
 166     HandleMark hm;
 167 
 168     gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
 169     TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
 170     GCTraceTime t1(GCCauseString("Full GC", gc_cause), PrintGC, !PrintGCDetails, NULL);
 171     TraceCollectorStats tcs(counters());
 172     TraceMemoryManagerStats tms(true /* Full GC */,gc_cause);
 173 
 174     if (TraceOldGenTime) accumulated_time()->start();
 175 
 176     // Let the size policy know we're starting
 177     size_policy->major_collection_begin();
 178 
 179     CodeCache::gc_prologue();
 180     Threads::gc_prologue();
 181     BiasedLocking::preserve_marks();
 182 
 183     // Capture heap size before collection for printing.
 184     size_t prev_used = heap->used();
 185 
 186     // Capture metadata size before collection for sizing.
 187     size_t metadata_prev_used = MetaspaceAux::used_bytes();
 188 
 189     // For PrintGCDetails
 190     size_t old_gen_prev_used = old_gen->used_in_bytes();
 191     size_t young_gen_prev_used = young_gen->used_in_bytes();
 192 
 193     allocate_stacks();
 194 

 334       }
 335       if (PrintAdaptiveSizePolicy) {
 336         gclog_or_tty->print_cr("AdaptiveSizeStop: collection: %d ",
 337                        heap->total_collections());
 338       }
 339     }
 340 
 341     if (UsePerfData) {
 342       heap->gc_policy_counters()->update_counters();
 343       heap->gc_policy_counters()->update_old_capacity(
 344         old_gen->capacity_in_bytes());
 345       heap->gc_policy_counters()->update_young_capacity(
 346         young_gen->capacity_in_bytes());
 347     }
 348 
 349     heap->resize_all_tlabs();
 350 
 351     // We collected the heap, recalculate the metaspace capacity
 352     MetaspaceGC::compute_new_size();
 353 
 354     if (TraceOldGenTime) accumulated_time()->stop();
 355 
 356     if (PrintGC) {
 357       if (PrintGCDetails) {
 358         // Don't print a GC timestamp here.  This is after the GC so
 359         // would be confusing.
 360         young_gen->print_used_change(young_gen_prev_used);
 361         old_gen->print_used_change(old_gen_prev_used);
 362       }
 363       heap->print_heap_change(prev_used);
 364       if (PrintGCDetails) {
 365         MetaspaceAux::print_metaspace_change(metadata_prev_used);
 366       }
 367     }
 368 
 369     // Track memory usage and detect low memory
 370     MemoryService::track_memory_usage();
 371     heap->update_counters();
 372   }
 373 
 374   if (VerifyAfterGC && heap->total_collections() >= VerifyGCStartAt) {