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6990754: Use native memory and reference counting to implement SymbolTable

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Move symbols from permgen into C heap and reference count them

Reviewed-by: never, acorn, jmasa, stefank
This commit is contained in:
Coleen Phillimore 2011-01-27 16:11:27 -08:00
parent 950858350d
commit 7b4f8073f0
223 changed files with 3783 additions and 3641 deletions
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8
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.cpp
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@ -2375,7 +2375,6 @@ void PSParallelCompact::marking_phase(ParCompactionManager* cm,
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::management));
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::system_dictionary));
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::jvmti));
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::vm_symbols));
q->enqueue(new MarkFromRootsTask(MarkFromRootsTask::code_cache));
if (parallel_gc_threads > 1) {
@ -2425,9 +2424,10 @@ void PSParallelCompact::marking_phase(ParCompactionManager* cm,
// Revisit memoized MDO's and clear any unmarked weak refs
follow_mdo_weak_refs();
// Visit symbol and interned string tables and delete unmarked oops
SymbolTable::unlink(is_alive_closure());
// Visit interned string tables and delete unmarked oops
StringTable::unlink(is_alive_closure());
// Clean up unreferenced symbols in symbol table.
SymbolTable::unlink();
assert(cm->marking_stacks_empty(), "marking stacks should be empty");
}
@ -2456,7 +2456,6 @@ void PSParallelCompact::adjust_roots() {
JvmtiExport::oops_do(adjust_root_pointer_closure());
// SO_AllClasses
SystemDictionary::oops_do(adjust_root_pointer_closure());
vmSymbols::oops_do(adjust_root_pointer_closure());
// Now adjust pointers in remaining weak roots. (All of which should
// have been cleared if they pointed to non-surviving objects.)
@ -2464,7 +2463,6 @@ void PSParallelCompact::adjust_roots() {
JNIHandles::weak_oops_do(&always_true, adjust_root_pointer_closure());
CodeCache::oops_do(adjust_pointer_closure());
SymbolTable::oops_do(adjust_root_pointer_closure());
StringTable::oops_do(adjust_root_pointer_closure());
ref_processor()->weak_oops_do(adjust_root_pointer_closure());
// Roots were visited so references into the young gen in roots