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4957990: Perm heap bloat in JVM

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Treat ProfileData in MDO's as a source of weak, not strong, roots. Fixes the bug for stop-world collection -- the case of concurrent collection will be fixed separately.

Reviewed-by: jcoomes, jmasa, kvn, never
This commit is contained in:
Y. Srinivas Ramakrishna 2009-09-02 00:04:29 -07:00
parent 2491751525
commit c6763b5bad
27 changed files with 385 additions and 65 deletions
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6
hotspot/src/share/vm/gc_implementation/parallelScavenge/psParallelCompact.hpp
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@ -901,7 +901,8 @@ class PSParallelCompact : AllStatic {
static void marking_phase(ParCompactionManager* cm,
bool maximum_heap_compaction);
static void follow_stack(ParCompactionManager* cm);
static void follow_weak_klass_links(ParCompactionManager* cm);
static void follow_weak_klass_links();
static void follow_mdo_weak_refs();
template <class T> static inline void adjust_pointer(T* p, bool is_root);
static void adjust_root_pointer(oop* p) { adjust_pointer(p, true); }
@ -1221,6 +1222,9 @@ class PSParallelCompact : AllStatic {
// Update subklass/sibling/implementor links at end of marking.
static void revisit_weak_klass_link(ParCompactionManager* cm, Klass* k);
// Clear unmarked oops in MDOs at the end of marking.
static void revisit_mdo(ParCompactionManager* cm, DataLayout* p);
#ifndef PRODUCT
// Debugging support.
static const char* space_names[last_space_id];