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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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26
hotspot/src/share/vm/gc_interface/collectedHeap.cpp
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@ -294,3 +294,29 @@ void CollectedHeap::resize_all_tlabs() {
ThreadLocalAllocBuffer::resize_all_tlabs();
}
}
void CollectedHeap::pre_full_gc_dump() {
if (HeapDumpBeforeFullGC) {
TraceTime tt("Heap Dump: ", PrintGCDetails, false, gclog_or_tty);
// We are doing a "major" collection and a heap dump before
// major collection has been requested.
HeapDumper::dump_heap();
}
if (PrintClassHistogramBeforeFullGC) {
TraceTime tt("Class Histogram: ", PrintGCDetails, true, gclog_or_tty);
VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */);
inspector.doit();
}
}
void CollectedHeap::post_full_gc_dump() {
if (HeapDumpAfterFullGC) {
TraceTime tt("Heap Dump", PrintGCDetails, false, gclog_or_tty);
HeapDumper::dump_heap();
}
if (PrintClassHistogramAfterFullGC) {
TraceTime tt("Class Histogram", PrintGCDetails, true, gclog_or_tty);
VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */, false /* ! prologue */);
inspector.doit();
}
}