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comparison src/share/vm/memory/heapInspection.cpp @ 615:c6c601a0f2d6

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6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC Summary: Call newly created CollectedHeap::dump_{pre,post}_full_gc before and after every stop-world full collection cycle on GenCollectedHeap and ParallelScavengeHeap. (Support for G1CollectedHeap forthcoming under CR 6810861.) Small modifications to existing heap dumping and class histogram implementation, especially to allow multiple on-the-fly histos/dumps by the VM thread during a single safepoint. Reviewed-by: jmasa, alanb, mchung
author ysr
date Mon, 02 Mar 2009 16:37:04 -0800
parents e9be0e04635a
children 7bb995fbd3c0
comparison
equal deleted inserted replaced
598:1fa16c3565be 615:c6c601a0f2d6
231 } 231 }
232 232
233 size_t missed_count() { return _missed_count; } 233 size_t missed_count() { return _missed_count; }
234 }; 234 };
235 235
236 void HeapInspection::heap_inspection(outputStream* st) { 236 void HeapInspection::heap_inspection(outputStream* st, bool need_prologue) {
237 ResourceMark rm; 237 ResourceMark rm;
238 HeapWord* ref; 238 HeapWord* ref;
239 239
240 CollectedHeap* heap = Universe::heap(); 240 CollectedHeap* heap = Universe::heap();
241 bool is_shared_heap = false; 241 bool is_shared_heap = false;
242 switch (heap->kind()) { 242 switch (heap->kind()) {
243 case CollectedHeap::G1CollectedHeap: 243 case CollectedHeap::G1CollectedHeap:
244 case CollectedHeap::GenCollectedHeap: { 244 case CollectedHeap::GenCollectedHeap: {
245 is_shared_heap = true; 245 is_shared_heap = true;
246 SharedHeap* sh = (SharedHeap*)heap; 246 SharedHeap* sh = (SharedHeap*)heap;
247 sh->gc_prologue(false /* !full */); // get any necessary locks, etc. 247 if (need_prologue) {
248 sh->gc_prologue(false /* !full */); // get any necessary locks, etc.
249 }
248 ref = sh->perm_gen()->used_region().start(); 250 ref = sh->perm_gen()->used_region().start();
249 break; 251 break;
250 } 252 }
251 #ifndef SERIALGC 253 #ifndef SERIALGC
252 case CollectedHeap::ParallelScavengeHeap: { 254 case CollectedHeap::ParallelScavengeHeap: {
288 } else { 290 } else {
289 st->print_cr("WARNING: Ran out of C-heap; histogram not generated"); 291 st->print_cr("WARNING: Ran out of C-heap; histogram not generated");
290 } 292 }
291 st->flush(); 293 st->flush();
292 294
293 if (is_shared_heap) { 295 if (need_prologue && is_shared_heap) {
294 SharedHeap* sh = (SharedHeap*)heap; 296 SharedHeap* sh = (SharedHeap*)heap;
295 sh->gc_epilogue(false /* !full */); // release all acquired locks, etc. 297 sh->gc_epilogue(false /* !full */); // release all acquired locks, etc.
296 } 298 }
297 } 299 }
298 300