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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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4
hotspot/src/share/vm/gc_implementation/parallelScavenge/psMarkSweep.cpp
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@ -125,6 +125,8 @@ void PSMarkSweep::invoke_no_policy(bool clear_all_softrefs) {
perm_gen->verify_object_start_array();
}
heap->pre_full_gc_dump();
// Filled in below to track the state of the young gen after the collection.
bool eden_empty;
bool survivors_empty;
@ -363,6 +365,8 @@ void PSMarkSweep::invoke_no_policy(bool clear_all_softrefs) {
Universe::print_heap_after_gc();
}
heap->post_full_gc_dump();
#ifdef TRACESPINNING
ParallelTaskTerminator::print_termination_counts();
#endif