Quelle  g1FullGCOopClosures.cpp

/*
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 *
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 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * accompanied this code).
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#include "precompiled.hpp"
#include "gc/g1/g1CollectedHeap.hpp"
#include "gc/g1/g1FullCollector.hpp"
#include "gc/g1/g1FullGCMarker.inline.hpp"
#include "gc/g1/g1FullGCOopClosures.inline.hpp"
#include "logging/logStream.hpp"
#include "memory/iterator.inline.hpp"
#include "oops/access.inline.hpp"
#include "oops/compressedOops.inline.hpp"
#include "oops/oop.inline.hpp"

G1IsAliveClosure::G1IsAliveClosure(G1FullCollector* collector) :
  G1IsAliveClosure(collector, collector->mark_bitmap()) { }

void G1FollowStackClosure::do_void() { _marker->follow_marking_stacks(); }

void G1FullKeepAliveClosure::do_oop(oop* p) { do_oop_work(p); }
void G1FullKeepAliveClosure::do_oop(narrowOop* p) { do_oop_work(p); }

G1VerifyOopClosure::G1VerifyOopClosure(VerifyOption option) :
   _g1h(G1CollectedHeap::heap()),
   _failures(false),
   _containing_obj(NULL),
   _verify_option(option),
   _cc(0) {
}

void G1VerifyOopClosure::print_object(outputStream* out, oop obj) {
#ifdef PRODUCT
  Klass* k = obj->klass();
  const char* class_name = InstanceKlass::cast(k)->external_name();
  out->print_cr("class name %s", class_name);
#else // PRODUCT
  obj->print_on(out);
#endif // PRODUCT
}

template <class T> void G1VerifyOopClosure::do_oop_work(T* p) {
  T heap_oop = RawAccess<>::oop_load(p);
  if (!CompressedOops::is_null(heap_oop)) {
    _cc++;
    oop obj = CompressedOops::decode_not_null(heap_oop);
    bool failed = false;
    if (!_g1h->is_in(obj) || _g1h->is_obj_dead_cond(obj, _verify_option)) {
      MutexLocker x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag);
      LogStreamHandle(Error, gc, verify) yy;
      if (!_failures) {
        yy.cr();
        yy.print_cr("----------");
      }
      if (!_g1h->is_in(obj)) {
        HeapRegion* from = _g1h->heap_region_containing(p);
        yy.print_cr("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region " HR_FORMAT,
                    p2i(p), p2i(_containing_obj), HR_FORMAT_PARAMS(from));
        print_object(&yy, _containing_obj);
        yy.print_cr("points to obj " PTR_FORMAT " not in the heap",
                    p2i(obj));
      } else {
        HeapRegion* from = _g1h->heap_region_containing(p);
        HeapRegion* to   = _g1h->heap_region_containing(obj);
        yy.print_cr("Field " PTR_FORMAT " of live obj " PTR_FORMAT " in region " HR_FORMAT,
                    p2i(p), p2i(_containing_obj), HR_FORMAT_PARAMS(from));
        print_object(&yy, _containing_obj);
        yy.print_cr("points to dead obj " PTR_FORMAT " in region " HR_FORMAT,
                    p2i(obj), HR_FORMAT_PARAMS(to));
        print_object(&yy, obj);
      }
      yy.print_cr("----------");
      yy.flush();
      _failures = true;
      failed = true;
    }
  }
}

template void G1VerifyOopClosure::do_oop_work(oop*);
template void G1VerifyOopClosure::do_oop_work(narrowOop*);