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8208677: Move inner metaspace cleaning out of class unloading

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Move to safepoint cleanup actions to do if needed.

Reviewed-by: eosterlund, hseigel
This commit is contained in:
Coleen Phillimore 2018-08-08 15:24:21 -04:00
parent 149026aa65
commit a7b66f6f5e
10 changed files with 94 additions and 31 deletions
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13
src/hotspot/share/runtime/safepoint.cpp
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@ -23,7 +23,7 @@
*/
#include "precompiled.hpp"
#include "classfile/classLoaderData.hpp"
#include "classfile/classLoaderData.inline.hpp"
#include "classfile/stringTable.hpp"
#include "classfile/symbolTable.hpp"
#include "classfile/systemDictionary.hpp"
@ -719,6 +719,7 @@ public:
post_safepoint_cleanup_task_event(&event, name);
}
}
_subtasks.all_tasks_completed(_num_workers);
}
};
@ -748,8 +749,18 @@ void SafepointSynchronize::do_cleanup_tasks() {
cleanup.work(0);
}
// Needs to be done single threaded by the VMThread. This walks
// the thread stacks looking for references to metadata before
// deciding to remove it from the metaspaces.
if (ClassLoaderDataGraph::should_clean_metaspaces_and_reset()) {
const char* name = "cleanup live ClassLoaderData metaspaces";
TraceTime timer(name, TRACETIME_LOG(Info, safepoint, cleanup));
ClassLoaderDataGraph::walk_metadata_and_clean_metaspaces();
}
// Finish monitor deflation.
ObjectSynchronizer::finish_deflate_idle_monitors(&deflate_counters);
}