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6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC

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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
This commit is contained in:
Y. Srinivas Ramakrishna 2009-03-02 16:37:04 -08:00
parent dd4aaeadd4
commit 72bfacbd95
15 changed files with 170 additions and 62 deletions
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2
hotspot/src/share/vm/memory/heapInspection.hpp
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@ -127,6 +127,6 @@ class KlassInfoHisto : public StackObj {
class HeapInspection : public AllStatic {
public:
static void heap_inspection(outputStream* st) KERNEL_RETURN;
static void heap_inspection(outputStream* st, bool need_prologue) KERNEL_RETURN;
static void find_instances_at_safepoint(klassOop k, GrowableArray<oop>* result) KERNEL_RETURN;
};