2796   return NULL;
2797 }
2798 #endif
2799 
2800 HeapWord*
2801 ConcurrentMarkSweepGeneration::expand_and_allocate(size_t word_size,
2802                                                    bool   tlab,
2803                                                    bool   parallel) {
2804   CMSSynchronousYieldRequest yr;
2805   assert(!tlab, "Can't deal with TLAB allocation");
2806   MutexLockerEx x(freelistLock(), Mutex::_no_safepoint_check_flag);
2807   expand(word_size*HeapWordSize, MinHeapDeltaBytes,
2808     CMSExpansionCause::_satisfy_allocation);
2809   if (GCExpandToAllocateDelayMillis > 0) {
2810     os::sleep(Thread::current(), GCExpandToAllocateDelayMillis, false);
2811   }
2812   return have_lock_and_allocate(word_size, tlab);
2813 }
2814 
2815 // YSR: All of this generation expansion/shrinking stuff is an exact copy of
2816 // OneContigSpaceCardGeneration, which makes me wonder if we should move this
2817 // to CardGeneration and share it...
2818 bool ConcurrentMarkSweepGeneration::expand(size_t bytes, size_t expand_bytes) {
2819   return CardGeneration::expand(bytes, expand_bytes);
2820 }
2821 
2822 void ConcurrentMarkSweepGeneration::expand(size_t bytes, size_t expand_bytes,
2823   CMSExpansionCause::Cause cause)
2824 {
2825 
2826   bool success = expand(bytes, expand_bytes);
2827 
2828   // remember why we expanded; this information is used
2829   // by shouldConcurrentCollect() when making decisions on whether to start
2830   // a new CMS cycle.
2831   if (success) {
2832     set_expansion_cause(cause);
2833     if (PrintGCDetails && Verbose) {
2834       gclog_or_tty->print_cr("Expanded CMS gen for %s",
2835         CMSExpansionCause::to_string(cause));
2836     }

2796   return NULL;
2797 }
2798 #endif
2799 
2800 HeapWord*
2801 ConcurrentMarkSweepGeneration::expand_and_allocate(size_t word_size,
2802                                                    bool   tlab,
2803                                                    bool   parallel) {
2804   CMSSynchronousYieldRequest yr;
2805   assert(!tlab, "Can't deal with TLAB allocation");
2806   MutexLockerEx x(freelistLock(), Mutex::_no_safepoint_check_flag);
2807   expand(word_size*HeapWordSize, MinHeapDeltaBytes,
2808     CMSExpansionCause::_satisfy_allocation);
2809   if (GCExpandToAllocateDelayMillis > 0) {
2810     os::sleep(Thread::current(), GCExpandToAllocateDelayMillis, false);
2811   }
2812   return have_lock_and_allocate(word_size, tlab);
2813 }
2814 
2815 // YSR: All of this generation expansion/shrinking stuff is an exact copy of
2816 // TenuredGeneration, which makes me wonder if we should move this
2817 // to CardGeneration and share it...
2818 bool ConcurrentMarkSweepGeneration::expand(size_t bytes, size_t expand_bytes) {
2819   return CardGeneration::expand(bytes, expand_bytes);
2820 }
2821 
2822 void ConcurrentMarkSweepGeneration::expand(size_t bytes, size_t expand_bytes,
2823   CMSExpansionCause::Cause cause)
2824 {
2825 
2826   bool success = expand(bytes, expand_bytes);
2827 
2828   // remember why we expanded; this information is used
2829   // by shouldConcurrentCollect() when making decisions on whether to start
2830   // a new CMS cycle.
2831   if (success) {
2832     set_expansion_cause(cause);
2833     if (PrintGCDetails && Verbose) {
2834       gclog_or_tty->print_cr("Expanded CMS gen for %s",
2835         CMSExpansionCause::to_string(cause));
2836     }