8204585: Remove IN_ARCHIVE_ROOT from Access API
Summary: Replaced Access API with API on heap.
Reviewed-by: jiangli, coleenp, tschatzl
Contributed-by: stefan.karlsson@oracle.com, kim.barrett@oracle.com
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#ifndef SHARE_VM_GC_G1_G1CONCURRENTMARKTHREAD_HPP
#define SHARE_VM_GC_G1_G1CONCURRENTMARKTHREAD_HPP
#include "gc/shared/concurrentGCPhaseManager.hpp"
#include "gc/shared/concurrentGCThread.hpp"
class G1ConcurrentMark;
class G1Policy;
// The concurrent mark thread triggers the various steps of the concurrent marking
// cycle, including various marking cleanup.
class G1ConcurrentMarkThread: public ConcurrentGCThread {
friend class VMStructs;
double _vtime_start; // Initial virtual time.
double _vtime_accum; // Accumulated virtual time.
double _vtime_mark_accum;
G1ConcurrentMark* _cm;
enum State {
Idle,
Started,
InProgress
};
volatile State _state;
// WhiteBox testing support.
ConcurrentGCPhaseManager::Stack _phase_manager_stack;
void sleep_before_next_cycle();
// Delay marking to meet MMU.
void delay_to_keep_mmu(G1Policy* g1_policy, bool remark);
double mmu_sleep_time(G1Policy* g1_policy, bool remark);
void run_service();
void stop_service();
public:
// Constructor
G1ConcurrentMarkThread(G1ConcurrentMark* cm);
// Total virtual time so far for this thread and concurrent marking tasks.
double vtime_accum();
// Marking virtual time so far this thread and concurrent marking tasks.
double vtime_mark_accum();
G1ConcurrentMark* cm() { return _cm; }
void set_idle() { assert(_state != Started, "must not be starting a new cycle"); _state = Idle; }
bool idle() { return _state == Idle; }
void set_started() { assert(_state == Idle, "cycle in progress"); _state = Started; }
bool started() { return _state == Started; }
void set_in_progress() { assert(_state == Started, "must be starting a cycle"); _state = InProgress; }
bool in_progress() { return _state == InProgress; }
// Returns true from the moment a marking cycle is
// initiated (during the initial-mark pause when started() is set)
// to the moment when the cycle completes (just after the next
// marking bitmap has been cleared and in_progress() is
// cleared). While during_cycle() is true we will not start another cycle
// so that cycles do not overlap. We cannot use just in_progress()
// as the CM thread might take some time to wake up before noticing
// that started() is set and set in_progress().
bool during_cycle() { return !idle(); }
// WhiteBox testing support.
const char* const* concurrent_phases() const;
bool request_concurrent_phase(const char* phase);
ConcurrentGCPhaseManager::Stack* phase_manager_stack() {
return &_phase_manager_stack;
}
};
#endif // SHARE_VM_GC_G1_G1CONCURRENTMARKTHREAD_HPP