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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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13
hotspot/src/share/vm/runtime/sweeper.cpp
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@ -125,8 +125,14 @@ void NMethodSweeper::process_nmethod(nmethod *nm) {
// there are no inline caches that referes to it.
if (nm->is_marked_for_reclamation()) {
assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
if (PrintMethodFlushing && Verbose) {
tty->print_cr("### Nmethod 0x%x (marked for reclamation) being flushed", nm);
}
nm->flush();
} else {
if (PrintMethodFlushing && Verbose) {
tty->print_cr("### Nmethod 0x%x (zombie) being marked for reclamation", nm);
}
nm->mark_for_reclamation();
_rescan = true;
}
@ -134,6 +140,9 @@ void NMethodSweeper::process_nmethod(nmethod *nm) {
// If there is no current activations of this method on the
// stack we can safely convert it to a zombie method
if (nm->can_not_entrant_be_converted()) {
if (PrintMethodFlushing && Verbose) {
tty->print_cr("### Nmethod 0x%x (not entrant) being made zombie", nm);
}
nm->make_zombie();
_rescan = true;
} else {
@ -146,7 +155,9 @@ void NMethodSweeper::process_nmethod(nmethod *nm) {
}
} else if (nm->is_unloaded()) {
// Unloaded code, just make it a zombie
if (nm->is_osr_only_method()) {
if (PrintMethodFlushing && Verbose)
tty->print_cr("### Nmethod 0x%x (unloaded) being made zombie", nm);
if (nm->is_osr_method()) {
// No inline caches will ever point to osr methods, so we can just remove it
nm->flush();
} else {