archive/jdk
1
0
Fork 0
mirror of https://github.com/openjdk/jdk.git synced 2025-09-19 18:44:38 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

8245961: Shenandoah: move some root marking to concurrent phase

Browse source 
Reviewed-by: shade
This commit is contained in:
Zhengyu Gu 2020-06-02 14:57:40 -04:00
parent 8752e02e66
commit 512cc3ebf2
8 changed files with 198 additions and 82 deletions
Download patch file Download diff file Expand all files Collapse all files

45
src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.inline.hpp
View file

@ -184,6 +184,51 @@ public:
}
};
template <bool CONCURRENT>
ShenandoahConcurrentRootScanner<CONCURRENT>::ShenandoahConcurrentRootScanner(uint n_workers,
ShenandoahPhaseTimings::Phase phase) :
_vm_roots(phase),
_cld_roots(phase, n_workers),
_codecache_snapshot(NULL),
_phase(phase) {
if (!ShenandoahHeap::heap()->unload_classes()) {
if (CONCURRENT) {
CodeCache_lock->lock_without_safepoint_check();
} else {
assert(SafepointSynchronize::is_at_safepoint(), "Must be at a safepoint");
}
_codecache_snapshot = ShenandoahCodeRoots::table()->snapshot_for_iteration();
}
assert(!CONCURRENT || !ShenandoahHeap::heap()->has_forwarded_objects(), "Not expecting forwarded pointers during concurrent marking");
}
template <bool CONCURRENT>
ShenandoahConcurrentRootScanner<CONCURRENT>::~ShenandoahConcurrentRootScanner() {
if (!ShenandoahHeap::heap()->unload_classes()) {
ShenandoahCodeRoots::table()->finish_iteration(_codecache_snapshot);
if (CONCURRENT) {
CodeCache_lock->unlock();
}
}
}
template <bool CONCURRENT>
void ShenandoahConcurrentRootScanner<CONCURRENT>::oops_do(OopClosure* oops, uint worker_id) {
ShenandoahHeap* const heap = ShenandoahHeap::heap();
CLDToOopClosure clds_cl(oops, CONCURRENT ? ClassLoaderData::_claim_strong : ClassLoaderData::_claim_none);
_vm_roots.oops_do(oops, worker_id);
if (!heap->unload_classes()) {
_cld_roots.cld_do(&clds_cl, worker_id);
ShenandoahWorkerTimingsTracker timer(_phase, ShenandoahPhaseTimings::CodeCacheRoots, worker_id);
CodeBlobToOopClosure blobs(oops, !CodeBlobToOopClosure::FixRelocations);
_codecache_snapshot->parallel_blobs_do(&blobs);
} else {
_cld_roots.always_strong_cld_do(&clds_cl, worker_id);
}
}
template <typename IsAlive, typename KeepAlive>
void ShenandoahRootUpdater::roots_do(uint worker_id, IsAlive* is_alive, KeepAlive* keep_alive) {
CodeBlobToOopClosure update_blobs(keep_alive, CodeBlobToOopClosure::FixRelocations);