282 // If expansion failed, do a last-ditch collection and try allocating
283 // again. A last-ditch collection will clear softrefs. This
284 // behavior is similar to the last-ditch collection done for perm
285 // gen when it was full and a collection for failed allocation
286 // did not free perm gen space.
287 heap->collect_as_vm_thread(GCCause::_last_ditch_collection);
288 _result = _loader_data->metaspace_non_null()->allocate(_size, _mdtype);
289 if (_result != NULL) {
290 return;
291 }
292
293 if (Verbose && PrintGCDetails) {
294 gclog_or_tty->print_cr("\nAfter Metaspace GC failed to allocate size "
295 SIZE_FORMAT, _size);
296 }
297
298 if (GC_locker::is_active_and_needs_gc()) {
299 set_gc_locked();
300 }
301 }
302
303 VM_CollectForAllocation::VM_CollectForAllocation(size_t word_size, uint gc_count_before, GCCause::Cause cause) :
304 VM_GC_Operation(gc_count_before, cause), _result(NULL), _word_size(word_size) {
305 // G1's incremental collections are not always caused by an allocation, which is indicated by word_size = 0.
306 assert(_word_size != 0 || UseG1GC, "word_size = 0 should only happen with G1");
307 }
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282 // If expansion failed, do a last-ditch collection and try allocating
283 // again. A last-ditch collection will clear softrefs. This
284 // behavior is similar to the last-ditch collection done for perm
285 // gen when it was full and a collection for failed allocation
286 // did not free perm gen space.
287 heap->collect_as_vm_thread(GCCause::_last_ditch_collection);
288 _result = _loader_data->metaspace_non_null()->allocate(_size, _mdtype);
289 if (_result != NULL) {
290 return;
291 }
292
293 if (Verbose && PrintGCDetails) {
294 gclog_or_tty->print_cr("\nAfter Metaspace GC failed to allocate size "
295 SIZE_FORMAT, _size);
296 }
297
298 if (GC_locker::is_active_and_needs_gc()) {
299 set_gc_locked();
300 }
301 }
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