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8038212: Method::is_valid_method() check has performance regression impact for stackwalking

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Only prune metaspace virtual spaces at safepoint so walking them is safe outside a safepoint.

Reviewed-by: mgerdin, mgronlun, hseigel, stefank
This commit is contained in:
Coleen Phillimore 2014-05-15 18:23:26 -04:00
parent cc3c656cf1
commit c336175c94
13 changed files with 84 additions and 72 deletions
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7
hotspot/src/share/vm/runtime/safepoint.cpp
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@ -541,6 +541,13 @@ void SafepointSynchronize::do_cleanup_tasks() {
gclog_or_tty->rotate_log(false);
}
{
// CMS delays purging the CLDG until the beginning of the next safepoint and to
// make sure concurrent sweep is done
TraceTime t7("purging class loader data graph", TraceSafepointCleanupTime);
ClassLoaderDataGraph::purge_if_needed();
}
if (MemTracker::is_on()) {
MemTracker::sync();
}