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6863023: need non-perm oops in code cache for JSR 292

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Make a special root-list for those few nmethods which might contain non-perm oops.

Reviewed-by: twisti, kvn, never, jmasa, ysr
This commit is contained in:
John R Rose 2009-09-15 21:53:47 -07:00
parent 1cf5b7ae11
commit e261aecad8
74 changed files with 979 additions and 279 deletions
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13
hotspot/src/share/vm/runtime/sweeper.cpp
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@ -34,6 +34,17 @@ jint NMethodSweeper::_locked_seen = 0;
jint NMethodSweeper::_not_entrant_seen_on_stack = 0;
bool NMethodSweeper::_rescan = false;
class MarkActivationClosure: public CodeBlobClosure {
public:
virtual void do_code_blob(CodeBlob* cb) {
// If we see an activation belonging to a non_entrant nmethod, we mark it.
if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) {
((nmethod*)cb)->mark_as_seen_on_stack();
}
}
};
static MarkActivationClosure mark_activation_closure;
void NMethodSweeper::sweep() {
assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint");
if (!MethodFlushing) return;
@ -57,7 +68,7 @@ void NMethodSweeper::sweep() {
if (PrintMethodFlushing) {
tty->print_cr("### Sweep: stack traversal %d", _traversals);
}
Threads::nmethods_do();
Threads::nmethods_do(&mark_activation_closure);
// reset the flags since we started a scan from the beginning.
_rescan = false;