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8079205: CallSite dependency tracking is broken after sun.misc.Cleaner became automatically cleared

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Reviewed-by: roland, psandoz, plevart, kbarrett, jrose
This commit is contained in:
Vladimir Ivanov 2015-05-15 19:23:11 +03:00
parent 18f7135255
commit e5a92a9fb9
18 changed files with 320 additions and 256 deletions
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34
hotspot/src/share/vm/code/codeCache.cpp
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@ -1047,40 +1047,6 @@ void CodeCache::flush_dependents_on(instanceKlassHandle dependee) {
}
}
// Flushes compiled methods dependent on a particular CallSite
// instance when its target is different than the given MethodHandle.
void CodeCache::flush_dependents_on(Handle call_site, Handle method_handle) {
assert_lock_strong(Compile_lock);
if (number_of_nmethods_with_dependencies() == 0) return;
// CodeCache can only be updated by a thread_in_VM and they will all be
// stopped during the safepoint so CodeCache will be safe to update without
// holding the CodeCache_lock.
CallSiteDepChange changes(call_site(), method_handle());
// Compute the dependent nmethods that have a reference to a
// CallSite object. We use InstanceKlass::mark_dependent_nmethod
// directly instead of CodeCache::mark_for_deoptimization because we
// want dependents on the call site class only not all classes in
// the ContextStream.
int marked = 0;
{
MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
InstanceKlass* ctxk = MethodHandles::get_call_site_context(call_site());
if (ctxk == NULL) {
return; // No dependencies to invalidate yet.
}
marked = ctxk->mark_dependent_nmethods(changes);
}
if (marked > 0) {
// At least one nmethod has been marked for deoptimization
VM_Deoptimize op;
VMThread::execute(&op);
}
}
#ifdef HOTSWAP
// Flushes compiled methods dependent on dependee in the evolutionary sense
void CodeCache::flush_evol_dependents_on(instanceKlassHandle ev_k_h) {