src/hotspot/share/gc/parallel/psVMOperations.cpp

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#include "gc/parallel/parallelScavengeHeap.inline.hpp"
#include "gc/parallel/psParallelCompact.inline.hpp"
#include "gc/parallel/psScavenge.hpp"
#include "gc/parallel/psVMOperations.hpp"
#include "gc/shared/gcLocker.hpp"
#include "utilities/dtrace.hpp"

// The following methods are used by the parallel scavenge collector
VM_ParallelCollectForAllocation::VM_ParallelCollectForAllocation(size_t word_size,
                                                                 bool is_tlab,
                                                                 uint gc_count) :
  VM_CollectForAllocation(word_size, gc_count, GCCause::_allocation_failure),
  _is_tlab(is_tlab) {
  assert(word_size != 0, "An allocation should always be requested with this operation.");
}

void VM_ParallelCollectForAllocation::doit() {
  ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();

  GCCauseSetter gccs(heap, _gc_cause);
  _result = heap->satisfy_failed_allocation(_word_size, _is_tlab);
}

static bool is_cause_full(GCCause::Cause cause) {
  return (cause != GCCause::_wb_young_gc)
         DEBUG_ONLY(&& (cause != GCCause::_scavenge_alot));
}

// Only used for System.gc() calls
VM_ParallelGCCollect::VM_ParallelGCCollect(uint gc_count,
                                             uint full_gc_count,
                                             GCCause::Cause gc_cause) :
  VM_GC_Operation(gc_count, gc_cause, full_gc_count, is_cause_full(gc_cause)) {}

void VM_ParallelGCCollect::doit() {
  ParallelScavengeHeap* heap = ParallelScavengeHeap::heap();

  GCCauseSetter gccs(heap, _gc_cause);
  heap->collect_at_safepoint(_full);
}