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8245827: Shenandoah: Cleanup Shenandoah code root iterators and root scanner

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Reviewed-by: shade
This commit is contained in:
Zhengyu Gu 2020-05-27 10:55:39 -04:00
parent 954db3353e
commit afbdb4932e
9 changed files with 104 additions and 150 deletions
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65
src/hotspot/share/gc/shenandoah/shenandoahRootProcessor.cpp
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@ -175,6 +175,19 @@ void ShenandoahConcurrentStringDedupRoots::oops_do(BoolObjectClosure* is_alive,
}
}
ShenandoahCodeCacheRoots::ShenandoahCodeCacheRoots(ShenandoahPhaseTimings::Phase phase) : _phase(phase) {
nmethod::oops_do_marking_prologue();
}
void ShenandoahCodeCacheRoots::code_blobs_do(CodeBlobClosure* blob_cl, uint worker_id) {
ShenandoahWorkerTimingsTracker timer(_phase, ShenandoahPhaseTimings::CodeCacheRoots, worker_id);
_coderoots_iterator.possibly_parallel_blobs_do(blob_cl);
}
ShenandoahCodeCacheRoots::~ShenandoahCodeCacheRoots() {
nmethod::oops_do_marking_epilogue();
}
ShenandoahRootProcessor::ShenandoahRootProcessor(ShenandoahPhaseTimings::Phase phase) :
_heap(ShenandoahHeap::heap()),
_phase(phase),
@ -182,6 +195,58 @@ ShenandoahRootProcessor::ShenandoahRootProcessor(ShenandoahPhaseTimings::Phase p
assert(SafepointSynchronize::is_at_safepoint(), "Must at safepoint");
}
ShenandoahRootScanner::ShenandoahRootScanner(uint n_workers, ShenandoahPhaseTimings::Phase phase) :
ShenandoahRootProcessor(phase),
_serial_roots(phase),
_thread_roots(phase, n_workers > 1),
_code_roots(phase),
_vm_roots(phase),
_dedup_roots(phase),
_cld_roots(phase) {
}
void ShenandoahRootScanner::roots_do(uint worker_id, OopClosure* oops) {
CLDToOopClosure clds_cl(oops, ClassLoaderData::_claim_strong);
MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations);
roots_do(worker_id, oops, &clds_cl, &blobs_cl);
}
void ShenandoahRootScanner::strong_roots_do(uint worker_id, OopClosure* oops) {
CLDToOopClosure clds_cl(oops, ClassLoaderData::_claim_strong);
MarkingCodeBlobClosure blobs_cl(oops, !CodeBlobToOopClosure::FixRelocations);
strong_roots_do(worker_id, oops, &clds_cl, &blobs_cl);
}
void ShenandoahRootScanner::roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code, ThreadClosure *tc) {
assert(!ShenandoahSafepoint::is_at_shenandoah_safepoint() ||
!ShenandoahHeap::heap()->unload_classes(),
"Expect class unloading when Shenandoah cycle is running");
ResourceMark rm;
_serial_roots.oops_do(oops, worker_id);
_vm_roots.oops_do(oops, worker_id);
assert(clds != NULL, "Only possible with CLD closure");
_cld_roots.cld_do(clds, worker_id);
ShenandoahParallelOopsDoThreadClosure tc_cl(oops, code, tc);
_thread_roots.threads_do(&tc_cl, worker_id);
AlwaysTrueClosure always_true;
_dedup_roots.oops_do(&always_true, oops, worker_id);
}
void ShenandoahRootScanner::strong_roots_do(uint worker_id, OopClosure* oops, CLDClosure* clds, CodeBlobClosure* code, ThreadClosure* tc) {
assert(ShenandoahHeap::heap()->unload_classes(), "Should be used during class unloading");
ShenandoahParallelOopsDoThreadClosure tc_cl(oops, code, tc);
ResourceMark rm;
_serial_roots.oops_do(oops, worker_id);
_vm_roots.oops_do(oops, worker_id);
_cld_roots.always_strong_cld_do(clds, worker_id);
_thread_roots.threads_do(&tc_cl, worker_id);
}
ShenandoahRootEvacuator::ShenandoahRootEvacuator(uint n_workers,
ShenandoahPhaseTimings::Phase phase,
bool stw_roots_processing,