hotspot/src/share/vm/gc_interface/collectedHeap.cpp
author coleenp
Tue, 08 Apr 2014 13:58:38 -0400
changeset 23872 536c66fc43d3
parent 23470 ff2a7ea4225d
child 23873 dc33274a6248
permissions -rw-r--r--
8028497: SIGSEGV at ClassLoaderData::oops_do(OopClosure*, KlassClosure*, bool) Summary: Keep class in CLD::_klasses list and mirror created for CDS classes if OOM during restore_shareable_info(). This keeps pointers consistent for CMS. Reviewed-by: ehelin, stefank, jmasa, iklam
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/*
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 * Copyright (c) 2001, 2014, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "gc_implementation/shared/gcHeapSummary.hpp"
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#include "gc_implementation/shared/gcTrace.hpp"
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#include "gc_implementation/shared/gcTraceTime.hpp"
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#include "gc_implementation/shared/gcWhen.hpp"
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#include "gc_implementation/shared/vmGCOperations.hpp"
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#include "gc_interface/allocTracer.hpp"
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#include "gc_interface/collectedHeap.hpp"
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#include "gc_interface/collectedHeap.inline.hpp"
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#include "memory/metaspace.hpp"
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#include "oops/oop.inline.hpp"
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#include "oops/instanceMirrorKlass.hpp"
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#include "runtime/init.hpp"
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#include "runtime/thread.inline.hpp"
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#include "services/heapDumper.hpp"
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#ifdef ASSERT
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int CollectedHeap::_fire_out_of_memory_count = 0;
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#endif
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size_t CollectedHeap::_filler_array_max_size = 0;
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template <>
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void EventLogBase<GCMessage>::print(outputStream* st, GCMessage& m) {
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  st->print_cr("GC heap %s", m.is_before ? "before" : "after");
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  st->print_raw(m);
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}
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void GCHeapLog::log_heap(bool before) {
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  if (!should_log()) {
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    return;
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  }
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  double timestamp = fetch_timestamp();
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  MutexLockerEx ml(&_mutex, Mutex::_no_safepoint_check_flag);
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  int index = compute_log_index();
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  _records[index].thread = NULL; // Its the GC thread so it's not that interesting.
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  _records[index].timestamp = timestamp;
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  _records[index].data.is_before = before;
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  stringStream st(_records[index].data.buffer(), _records[index].data.size());
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  if (before) {
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    Universe::print_heap_before_gc(&st, true);
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  } else {
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    Universe::print_heap_after_gc(&st, true);
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  }
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}
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VirtualSpaceSummary CollectedHeap::create_heap_space_summary() {
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  size_t capacity_in_words = capacity() / HeapWordSize;
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  return VirtualSpaceSummary(
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    reserved_region().start(), reserved_region().start() + capacity_in_words, reserved_region().end());
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}
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GCHeapSummary CollectedHeap::create_heap_summary() {
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  VirtualSpaceSummary heap_space = create_heap_space_summary();
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  return GCHeapSummary(heap_space, used());
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}
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MetaspaceSummary CollectedHeap::create_metaspace_summary() {
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  const MetaspaceSizes meta_space(
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      MetaspaceAux::allocated_capacity_bytes(),
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      MetaspaceAux::allocated_used_bytes(),
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      MetaspaceAux::reserved_bytes());
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  const MetaspaceSizes data_space(
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      MetaspaceAux::allocated_capacity_bytes(Metaspace::NonClassType),
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      MetaspaceAux::allocated_used_bytes(Metaspace::NonClassType),
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      MetaspaceAux::reserved_bytes(Metaspace::NonClassType));
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  const MetaspaceSizes class_space(
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      MetaspaceAux::allocated_capacity_bytes(Metaspace::ClassType),
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      MetaspaceAux::allocated_used_bytes(Metaspace::ClassType),
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      MetaspaceAux::reserved_bytes(Metaspace::ClassType));
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  const MetaspaceChunkFreeListSummary& ms_chunk_free_list_summary =
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    MetaspaceAux::chunk_free_list_summary(Metaspace::NonClassType);
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  const MetaspaceChunkFreeListSummary& class_chunk_free_list_summary =
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    MetaspaceAux::chunk_free_list_summary(Metaspace::ClassType);
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  return MetaspaceSummary(MetaspaceGC::capacity_until_GC(), meta_space, data_space, class_space,
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                          ms_chunk_free_list_summary, class_chunk_free_list_summary);
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}
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void CollectedHeap::print_heap_before_gc() {
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  if (PrintHeapAtGC) {
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    Universe::print_heap_before_gc();
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  }
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  if (_gc_heap_log != NULL) {
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    _gc_heap_log->log_heap_before();
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  }
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}
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void CollectedHeap::print_heap_after_gc() {
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  if (PrintHeapAtGC) {
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    Universe::print_heap_after_gc();
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  }
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  if (_gc_heap_log != NULL) {
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    _gc_heap_log->log_heap_after();
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  }
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}
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void CollectedHeap::register_nmethod(nmethod* nm) {
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  assert_locked_or_safepoint(CodeCache_lock);
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}
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void CollectedHeap::unregister_nmethod(nmethod* nm) {
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  assert_locked_or_safepoint(CodeCache_lock);
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}
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void CollectedHeap::trace_heap(GCWhen::Type when, GCTracer* gc_tracer) {
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  const GCHeapSummary& heap_summary = create_heap_summary();
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  gc_tracer->report_gc_heap_summary(when, heap_summary);
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  const MetaspaceSummary& metaspace_summary = create_metaspace_summary();
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  gc_tracer->report_metaspace_summary(when, metaspace_summary);
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}
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void CollectedHeap::trace_heap_before_gc(GCTracer* gc_tracer) {
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  trace_heap(GCWhen::BeforeGC, gc_tracer);
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}
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void CollectedHeap::trace_heap_after_gc(GCTracer* gc_tracer) {
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  trace_heap(GCWhen::AfterGC, gc_tracer);
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}
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// Memory state functions.
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CollectedHeap::CollectedHeap() : _n_par_threads(0)
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{
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  const size_t max_len = size_t(arrayOopDesc::max_array_length(T_INT));
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  const size_t elements_per_word = HeapWordSize / sizeof(jint);
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  _filler_array_max_size = align_object_size(filler_array_hdr_size() +
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                                             max_len / elements_per_word);
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  _barrier_set = NULL;
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  _is_gc_active = false;
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  _total_collections = _total_full_collections = 0;
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  _gc_cause = _gc_lastcause = GCCause::_no_gc;
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  NOT_PRODUCT(_promotion_failure_alot_count = 0;)
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  NOT_PRODUCT(_promotion_failure_alot_gc_number = 0;)
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  if (UsePerfData) {
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    EXCEPTION_MARK;
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    // create the gc cause jvmstat counters
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    _perf_gc_cause = PerfDataManager::create_string_variable(SUN_GC, "cause",
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                             80, GCCause::to_string(_gc_cause), CHECK);
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    _perf_gc_lastcause =
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                PerfDataManager::create_string_variable(SUN_GC, "lastCause",
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                             80, GCCause::to_string(_gc_lastcause), CHECK);
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  }
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  _defer_initial_card_mark = false; // strengthened by subclass in pre_initialize() below.
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  // Create the ring log
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  if (LogEvents) {
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    _gc_heap_log = new GCHeapLog();
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  } else {
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    _gc_heap_log = NULL;
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  }
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}
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// This interface assumes that it's being called by the
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// vm thread. It collects the heap assuming that the
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// heap lock is already held and that we are executing in
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// the context of the vm thread.
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void CollectedHeap::collect_as_vm_thread(GCCause::Cause cause) {
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  assert(Thread::current()->is_VM_thread(), "Precondition#1");
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  assert(Heap_lock->is_locked(), "Precondition#2");
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  GCCauseSetter gcs(this, cause);
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  switch (cause) {
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    case GCCause::_heap_inspection:
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    case GCCause::_heap_dump:
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    case GCCause::_metadata_GC_threshold : {
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      HandleMark hm;
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      do_full_collection(false);        // don't clear all soft refs
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      break;
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    }
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    case GCCause::_last_ditch_collection: {
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      HandleMark hm;
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      do_full_collection(true);         // do clear all soft refs
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      break;
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    }
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    default:
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      ShouldNotReachHere(); // Unexpected use of this function
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  }
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}
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void CollectedHeap::pre_initialize() {
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  // Used for ReduceInitialCardMarks (when COMPILER2 is used);
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  // otherwise remains unused.
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#ifdef COMPILER2
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  _defer_initial_card_mark =    ReduceInitialCardMarks && can_elide_tlab_store_barriers()
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                             && (DeferInitialCardMark || card_mark_must_follow_store());
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#else
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  assert(_defer_initial_card_mark == false, "Who would set it?");
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#endif
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}
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#ifndef PRODUCT
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void CollectedHeap::check_for_bad_heap_word_value(HeapWord* addr, size_t size) {
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  if (CheckMemoryInitialization && ZapUnusedHeapArea) {
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    for (size_t slot = 0; slot < size; slot += 1) {
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      assert((*(intptr_t*) (addr + slot)) != ((intptr_t) badHeapWordVal),
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             "Found badHeapWordValue in post-allocation check");
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    }
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  }
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}
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void CollectedHeap::check_for_non_bad_heap_word_value(HeapWord* addr, size_t size) {
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  if (CheckMemoryInitialization && ZapUnusedHeapArea) {
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    for (size_t slot = 0; slot < size; slot += 1) {
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      assert((*(intptr_t*) (addr + slot)) == ((intptr_t) badHeapWordVal),
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             "Found non badHeapWordValue in pre-allocation check");
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    }
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  }
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}
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#endif // PRODUCT
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#ifdef ASSERT
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void CollectedHeap::check_for_valid_allocation_state() {
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  Thread *thread = Thread::current();
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  // How to choose between a pending exception and a potential
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  // OutOfMemoryError?  Don't allow pending exceptions.
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  // This is a VM policy failure, so how do we exhaustively test it?
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  assert(!thread->has_pending_exception(),
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         "shouldn't be allocating with pending exception");
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  if (StrictSafepointChecks) {
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    assert(thread->allow_allocation(),
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           "Allocation done by thread for which allocation is blocked "
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           "by No_Allocation_Verifier!");
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    // Allocation of an oop can always invoke a safepoint,
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    // hence, the true argument
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    thread->check_for_valid_safepoint_state(true);
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  }
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}
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#endif
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HeapWord* CollectedHeap::allocate_from_tlab_slow(KlassHandle klass, Thread* thread, size_t size) {
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  // Retain tlab and allocate object in shared space if
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  // the amount free in the tlab is too large to discard.
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  if (thread->tlab().free() > thread->tlab().refill_waste_limit()) {
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    thread->tlab().record_slow_allocation(size);
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    return NULL;
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  }
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  // Discard tlab and allocate a new one.
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  // To minimize fragmentation, the last TLAB may be smaller than the rest.
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  size_t new_tlab_size = thread->tlab().compute_size(size);
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  thread->tlab().clear_before_allocation();
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  if (new_tlab_size == 0) {
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    return NULL;
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  }
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  // Allocate a new TLAB...
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  HeapWord* obj = Universe::heap()->allocate_new_tlab(new_tlab_size);
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  if (obj == NULL) {
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    return NULL;
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  }
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  AllocTracer::send_allocation_in_new_tlab_event(klass, new_tlab_size * HeapWordSize, size * HeapWordSize);
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  if (ZeroTLAB) {
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    // ..and clear it.
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    Copy::zero_to_words(obj, new_tlab_size);
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  } else {
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    // ...and zap just allocated object.
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#ifdef ASSERT
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    // Skip mangling the space corresponding to the object header to
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    // ensure that the returned space is not considered parsable by
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    // any concurrent GC thread.
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    size_t hdr_size = oopDesc::header_size();
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    Copy::fill_to_words(obj + hdr_size, new_tlab_size - hdr_size, badHeapWordVal);
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#endif // ASSERT
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  }
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  thread->tlab().fill(obj, obj + size, new_tlab_size);
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  return obj;
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}
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void CollectedHeap::flush_deferred_store_barrier(JavaThread* thread) {
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  MemRegion deferred = thread->deferred_card_mark();
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  if (!deferred.is_empty()) {
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    assert(_defer_initial_card_mark, "Otherwise should be empty");
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    {
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      // Verify that the storage points to a parsable object in heap
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   314
      DEBUG_ONLY(oop old_obj = oop(deferred.start());)
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   315
      assert(is_in(old_obj), "Not in allocated heap");
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   316
      assert(!can_elide_initializing_store_barrier(old_obj),
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   317
             "Else should have been filtered in new_store_pre_barrier()");
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   318
      assert(old_obj->is_oop(true), "Not an oop");
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   319
      assert(deferred.word_size() == (size_t)(old_obj->size()),
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   320
             "Mismatch: multiple objects?");
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   321
    }
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   322
    BarrierSet* bs = barrier_set();
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   323
    assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
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   324
    bs->write_region(deferred);
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   325
    // "Clear" the deferred_card_mark field
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   326
    thread->set_deferred_card_mark(MemRegion());
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   327
  }
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   328
  assert(thread->deferred_card_mark().is_empty(), "invariant");
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   329
}
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diff changeset
   330
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   331
size_t CollectedHeap::max_tlab_size() const {
a29022212180 8030177: G1: Enable TLAB resizing
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   332
  // TLABs can't be bigger than we can fill with a int[Integer.MAX_VALUE].
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   333
  // This restriction could be removed by enabling filling with multiple arrays.
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   334
  // If we compute that the reasonable way as
a29022212180 8030177: G1: Enable TLAB resizing
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   335
  //    header_size + ((sizeof(jint) * max_jint) / HeapWordSize)
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   336
  // we'll overflow on the multiply, so we do the divide first.
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diff changeset
   337
  // We actually lose a little by dividing first,
a29022212180 8030177: G1: Enable TLAB resizing
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   338
  // but that just makes the TLAB  somewhat smaller than the biggest array,
a29022212180 8030177: G1: Enable TLAB resizing
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   339
  // which is fine, since we'll be able to fill that.
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   340
  size_t max_int_size = typeArrayOopDesc::header_size(T_INT) +
a29022212180 8030177: G1: Enable TLAB resizing
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   341
              sizeof(jint) *
a29022212180 8030177: G1: Enable TLAB resizing
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   342
              ((juint) max_jint / (size_t) HeapWordSize);
a29022212180 8030177: G1: Enable TLAB resizing
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   343
  return align_size_down(max_int_size, MinObjAlignment);
a29022212180 8030177: G1: Enable TLAB resizing
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   344
}
a29022212180 8030177: G1: Enable TLAB resizing
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parents: 21561
diff changeset
   345
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   346
// Helper for ReduceInitialCardMarks. For performance,
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diff changeset
   347
// compiled code may elide card-marks for initializing stores
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   348
// to a newly allocated object along the fast-path. We
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   349
// compensate for such elided card-marks as follows:
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   350
// (a) Generational, non-concurrent collectors, such as
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   351
//     GenCollectedHeap(ParNew,DefNew,Tenured) and
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   352
//     ParallelScavengeHeap(ParallelGC, ParallelOldGC)
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   353
//     need the card-mark if and only if the region is
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   354
//     in the old gen, and do not care if the card-mark
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   355
//     succeeds or precedes the initializing stores themselves,
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   356
//     so long as the card-mark is completed before the next
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   357
//     scavenge. For all these cases, we can do a card mark
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   358
//     at the point at which we do a slow path allocation
4637
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diff changeset
   359
//     in the old gen, i.e. in this call.
4030
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   360
// (b) GenCollectedHeap(ConcurrentMarkSweepGeneration) requires
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   361
//     in addition that the card-mark for an old gen allocated
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   362
//     object strictly follow any associated initializing stores.
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   363
//     In these cases, the memRegion remembered below is
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   364
//     used to card-mark the entire region either just before the next
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   365
//     slow-path allocation by this thread or just before the next scavenge or
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   366
//     CMS-associated safepoint, whichever of these events happens first.
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   367
//     (The implicit assumption is that the object has been fully
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   368
//     initialized by this point, a fact that we assert when doing the
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   369
//     card-mark.)
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diff changeset
   370
// (c) G1CollectedHeap(G1) uses two kinds of write barriers. When a
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   371
//     G1 concurrent marking is in progress an SATB (pre-write-)barrier is
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   372
//     is used to remember the pre-value of any store. Initializing
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   373
//     stores will not need this barrier, so we need not worry about
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   374
//     compensating for the missing pre-barrier here. Turning now
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   375
//     to the post-barrier, we note that G1 needs a RS update barrier
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   376
//     which simply enqueues a (sequence of) dirty cards which may
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   377
//     optionally be refined by the concurrent update threads. Note
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
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diff changeset
   378
//     that this barrier need only be applied to a non-young write,
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   379
//     but, like in CMS, because of the presence of concurrent refinement
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   380
//     (much like CMS' precleaning), must strictly follow the oop-store.
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   381
//     Thus, using the same protocol for maintaining the intended
4637
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diff changeset
   382
//     invariants turns out, serendepitously, to be the same for both
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diff changeset
   383
//     G1 and CMS.
4030
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   384
//
4637
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   385
// For any future collector, this code should be reexamined with
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   386
// that specific collector in mind, and the documentation above suitably
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   387
// extended and updated.
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   388
oop CollectedHeap::new_store_pre_barrier(JavaThread* thread, oop new_obj) {
4030
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   389
  // If a previous card-mark was deferred, flush it now.
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   390
  flush_deferred_store_barrier(thread);
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   391
  if (can_elide_initializing_store_barrier(new_obj)) {
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 2154
diff changeset
   392
    // The deferred_card_mark region should be empty
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
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diff changeset
   393
    // following the flush above.
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   394
    assert(thread->deferred_card_mark().is_empty(), "Error");
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   395
  } else {
4637
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   396
    MemRegion mr((HeapWord*)new_obj, new_obj->size());
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   397
    assert(!mr.is_empty(), "Error");
af4d405aacc1 6896647: card marks can be deferred too long
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diff changeset
   398
    if (_defer_initial_card_mark) {
af4d405aacc1 6896647: card marks can be deferred too long
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parents: 4636
diff changeset
   399
      // Defer the card mark
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   400
      thread->set_deferred_card_mark(mr);
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   401
    } else {
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   402
      // Do the card mark
af4d405aacc1 6896647: card marks can be deferred too long
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parents: 4636
diff changeset
   403
      BarrierSet* bs = barrier_set();
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   404
      assert(bs->has_write_region_opt(), "No write_region() on BarrierSet");
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   405
      bs->write_region(mr);
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   406
    }
4030
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
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diff changeset
   407
  }
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 2154
diff changeset
   408
  return new_obj;
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 2154
diff changeset
   409
}
4c471254865e 6888898: CMS: ReduceInitialCardMarks unsafe in the presence of cms precleaning
ysr
parents: 2154
diff changeset
   410
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   411
size_t CollectedHeap::filler_array_hdr_size() {
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5544
diff changeset
   412
  return size_t(align_object_offset(arrayOopDesc::header_size(T_INT))); // align to Long
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   413
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   414
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   415
size_t CollectedHeap::filler_array_min_size() {
5694
1e0532a6abff 6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
kvn
parents: 5544
diff changeset
   416
  return align_object_size(filler_array_hdr_size()); // align to MinObjAlignment
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   417
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   418
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   419
#ifdef ASSERT
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   420
void CollectedHeap::fill_args_check(HeapWord* start, size_t words)
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   421
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   422
  assert(words >= min_fill_size(), "too small to fill");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   423
  assert(words % MinObjAlignment == 0, "unaligned size");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   424
  assert(Universe::heap()->is_in_reserved(start), "not in heap");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   425
  assert(Universe::heap()->is_in_reserved(start + words - 1), "not in heap");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   426
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   427
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   428
void CollectedHeap::zap_filler_array(HeapWord* start, size_t words, bool zap)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   429
{
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   430
  if (ZapFillerObjects && zap) {
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   431
    Copy::fill_to_words(start + filler_array_hdr_size(),
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   432
                        words - filler_array_hdr_size(), 0XDEAFBABE);
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   433
  }
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   434
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   435
#endif // ASSERT
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   436
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   437
void
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   438
CollectedHeap::fill_with_array(HeapWord* start, size_t words, bool zap)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   439
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   440
  assert(words >= filler_array_min_size(), "too small for an array");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   441
  assert(words <= filler_array_max_size(), "too big for a single object");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   442
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   443
  const size_t payload_size = words - filler_array_hdr_size();
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   444
  const size_t len = payload_size * HeapWordSize / sizeof(jint);
12229
c34a85c8f5aa 7103665: HeapWord*ParallelScavengeHeap::failed_mem_allocate(unsigned long,bool)+0x97
brutisso
parents: 11788
diff changeset
   445
  assert((int)len >= 0, err_msg("size too large " SIZE_FORMAT " becomes %d", words, (int)len));
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   446
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   447
  // Set the length first for concurrent GC.
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   448
  ((arrayOop)start)->set_length((int)len);
12236
51d6463cfd9d 7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents: 12229
diff changeset
   449
  post_allocation_setup_common(Universe::intArrayKlassObj(), start);
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   450
  DEBUG_ONLY(zap_filler_array(start, words, zap);)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   451
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   452
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   453
void
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   454
CollectedHeap::fill_with_object_impl(HeapWord* start, size_t words, bool zap)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   455
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   456
  assert(words <= filler_array_max_size(), "too big for a single object");
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   457
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   458
  if (words >= filler_array_min_size()) {
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   459
    fill_with_array(start, words, zap);
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   460
  } else if (words > 0) {
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   461
    assert(words == min_fill_size(), "unaligned size");
12236
51d6463cfd9d 7156764: Remove unused size parameter from some CollectedHeap methods
brutisso
parents: 12229
diff changeset
   462
    post_allocation_setup_common(SystemDictionary::Object_klass(), start);
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   463
  }
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   464
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   465
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   466
void CollectedHeap::fill_with_object(HeapWord* start, size_t words, bool zap)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   467
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   468
  DEBUG_ONLY(fill_args_check(start, words);)
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   469
  HandleMark hm;  // Free handles before leaving.
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   470
  fill_with_object_impl(start, words, zap);
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   471
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   472
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   473
void CollectedHeap::fill_with_objects(HeapWord* start, size_t words, bool zap)
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   474
{
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   475
  DEBUG_ONLY(fill_args_check(start, words);)
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   476
  HandleMark hm;  // Free handles before leaving.
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   477
5544
de5f430a289c 6953952: collectedHeap.cpp should use #ifdef _LP64 not LP64
ysr
parents: 5543
diff changeset
   478
#ifdef _LP64
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   479
  // A single array can fill ~8G, so multiple objects are needed only in 64-bit.
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   480
  // First fill with arrays, ensuring that any remaining space is big enough to
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   481
  // fill.  The remainder is filled with a single object.
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   482
  const size_t min = min_fill_size();
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   483
  const size_t max = filler_array_max_size();
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   484
  while (words > max) {
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   485
    const size_t cur = words - max >= min ? max : max - min;
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   486
    fill_with_array(start, cur, zap);
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   487
    start += cur;
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   488
    words -= cur;
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   489
  }
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   490
#endif
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   491
4636
90e004691873 6902115: G1:assert(ignore_max_completed||thread->is_Java_thread()||SafepointSynchronize::is_at_safepoint())
johnc
parents: 4571
diff changeset
   492
  fill_with_object_impl(start, words, zap);
1668
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   493
}
8ec481b8f514 6578152: fill_region_with_object has usability and safety issues
jcoomes
parents: 1388
diff changeset
   494
21561
c619b1cb4554 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents: 20406
diff changeset
   495
void CollectedHeap::post_initialize() {
c619b1cb4554 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents: 20406
diff changeset
   496
  collector_policy()->post_heap_initialize();
c619b1cb4554 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents: 20406
diff changeset
   497
}
c619b1cb4554 8016309: assert(eden_size > 0 && survivor_size > 0) failed: just checking
jwilhelm
parents: 20406
diff changeset
   498
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   499
HeapWord* CollectedHeap::allocate_new_tlab(size_t size) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   500
  guarantee(false, "thread-local allocation buffers not supported");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   501
  return NULL;
489c9b5090e2 Initial load
duke
parents:
diff changeset
   502
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   503
489c9b5090e2 Initial load
duke
parents:
diff changeset
   504
void CollectedHeap::ensure_parsability(bool retire_tlabs) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   505
  // The second disjunct in the assertion below makes a concession
489c9b5090e2 Initial load
duke
parents:
diff changeset
   506
  // for the start-up verification done while the VM is being
489c9b5090e2 Initial load
duke
parents:
diff changeset
   507
  // created. Callers be careful that you know that mutators
489c9b5090e2 Initial load
duke
parents:
diff changeset
   508
  // aren't going to interfere -- for instance, this is permissible
489c9b5090e2 Initial load
duke
parents:
diff changeset
   509
  // if we are still single-threaded and have either not yet
489c9b5090e2 Initial load
duke
parents:
diff changeset
   510
  // started allocating (nothing much to verify) or we have
489c9b5090e2 Initial load
duke
parents:
diff changeset
   511
  // started allocating but are now a full-fledged JavaThread
489c9b5090e2 Initial load
duke
parents:
diff changeset
   512
  // (and have thus made our TLAB's) available for filling.
489c9b5090e2 Initial load
duke
parents:
diff changeset
   513
  assert(SafepointSynchronize::is_at_safepoint() ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   514
         !is_init_completed(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   515
         "Should only be called at a safepoint or at start-up"
489c9b5090e2 Initial load
duke
parents:
diff changeset
   516
         " otherwise concurrent mutator activity may make heap "
489c9b5090e2 Initial load
duke
parents:
diff changeset
   517
         " unparsable again");
4637
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   518
  const bool use_tlab = UseTLAB;
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   519
  const bool deferred = _defer_initial_card_mark;
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   520
  // The main thread starts allocating via a TLAB even before it
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   521
  // has added itself to the threads list at vm boot-up.
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   522
  assert(!use_tlab || Threads::first() != NULL,
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   523
         "Attempt to fill tlabs before main thread has been added"
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   524
         " to threads list is doomed to failure!");
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   525
  for (JavaThread *thread = Threads::first(); thread; thread = thread->next()) {
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   526
     if (use_tlab) thread->tlab().make_parsable(retire_tlabs);
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   527
#ifdef COMPILER2
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   528
     // The deferred store barriers must all have been flushed to the
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   529
     // card-table (or other remembered set structure) before GC starts
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   530
     // processing the card-table (or other remembered set).
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   531
     if (deferred) flush_deferred_store_barrier(thread);
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   532
#else
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   533
     assert(!deferred, "Should be false");
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   534
     assert(thread->deferred_card_mark().is_empty(), "Should be empty");
af4d405aacc1 6896647: card marks can be deferred too long
ysr
parents: 4636
diff changeset
   535
#endif
1
489c9b5090e2 Initial load
duke
parents:
diff changeset
   536
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   537
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   538
489c9b5090e2 Initial load
duke
parents:
diff changeset
   539
void CollectedHeap::accumulate_statistics_all_tlabs() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   540
  if (UseTLAB) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   541
    assert(SafepointSynchronize::is_at_safepoint() ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   542
         !is_init_completed(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   543
         "should only accumulate statistics on tlabs at safepoint");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   544
489c9b5090e2 Initial load
duke
parents:
diff changeset
   545
    ThreadLocalAllocBuffer::accumulate_statistics_before_gc();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   546
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   547
}
489c9b5090e2 Initial load
duke
parents:
diff changeset
   548
489c9b5090e2 Initial load
duke
parents:
diff changeset
   549
void CollectedHeap::resize_all_tlabs() {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   550
  if (UseTLAB) {
489c9b5090e2 Initial load
duke
parents:
diff changeset
   551
    assert(SafepointSynchronize::is_at_safepoint() ||
489c9b5090e2 Initial load
duke
parents:
diff changeset
   552
         !is_init_completed(),
489c9b5090e2 Initial load
duke
parents:
diff changeset
   553
         "should only resize tlabs at safepoint");
489c9b5090e2 Initial load
duke
parents:
diff changeset
   554
489c9b5090e2 Initial load
duke
parents:
diff changeset
   555
    ThreadLocalAllocBuffer::resize_all_tlabs();
489c9b5090e2 Initial load
duke
parents:
diff changeset
   556
  }
489c9b5090e2 Initial load
duke
parents:
diff changeset
   557
}
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   558
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   559
void CollectedHeap::pre_full_gc_dump(GCTimer* timer) {
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   560
  if (HeapDumpBeforeFullGC) {
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   561
    GCTraceTime tt("Heap Dump (before full gc): ", PrintGCDetails, false, timer);
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   562
    // We are doing a "major" collection and a heap dump before
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   563
    // major collection has been requested.
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   564
    HeapDumper::dump_heap();
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   565
  }
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   566
  if (PrintClassHistogramBeforeFullGC) {
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   567
    GCTraceTime tt("Class Histogram (before full gc): ", PrintGCDetails, true, timer);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   568
    VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */);
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   569
    inspector.doit();
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   570
  }
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   571
}
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   572
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   573
void CollectedHeap::post_full_gc_dump(GCTimer* timer) {
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   574
  if (HeapDumpAfterFullGC) {
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   575
    GCTraceTime tt("Heap Dump (after full gc): ", PrintGCDetails, false, timer);
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   576
    HeapDumper::dump_heap();
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   577
  }
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   578
  if (PrintClassHistogramAfterFullGC) {
18025
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   579
    GCTraceTime tt("Class Histogram (after full gc): ", PrintGCDetails, true, timer);
b7bcf7497f93 8005849: JEP 167: Event-Based JVM Tracing
sla
parents: 14583
diff changeset
   580
    VM_GC_HeapInspection inspector(gclog_or_tty, false /* ! full gc */);
2141
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   581
    inspector.doit();
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   582
  }
e9a644aaff87 6797870: Add -XX:+{HeapDump,PrintClassHistogram}{Before,After}FullGC
ysr
parents: 1681
diff changeset
   583
}
10742
a64c942e4e6b 7098528: crash with java -XX:+ExtendedDTraceProbes
never
parents: 10565
diff changeset
   584
11247
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   585
/////////////// Unit tests ///////////////
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   586
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   587
#ifndef PRODUCT
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   588
void CollectedHeap::test_is_in() {
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   589
  CollectedHeap* heap = Universe::heap();
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
stefank
parents: 10742
diff changeset
   590
11414
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   591
  uintptr_t epsilon    = (uintptr_t) MinObjAlignment;
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   592
  uintptr_t heap_start = (uintptr_t) heap->_reserved.start();
5179aa58e6e9 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1
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diff changeset
   593
  uintptr_t heap_end   = (uintptr_t) heap->_reserved.end();
5179aa58e6e9 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1
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diff changeset
   594
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   595
  // Test that NULL is not in the heap.
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   596
  assert(!heap->is_in(NULL), "NULL is unexpectedly in the heap");
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
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diff changeset
   597
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   598
  // Test that a pointer to before the heap start is reported as outside the heap.
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   599
  assert(heap_start >= ((uintptr_t)NULL + epsilon), "sanity");
5179aa58e6e9 7125503: Compiling collectedHeap.cpp fails with -Werror=int-to-pointer-cast with g++ 4.6.1
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   600
  void* before_heap = (void*)(heap_start - epsilon);
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d6faa02b3802 7121373: Clean up CollectedHeap::is_in
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   601
  assert(!heap->is_in(before_heap),
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
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   602
      err_msg("before_heap: " PTR_FORMAT " is unexpectedly in the heap", before_heap));
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
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diff changeset
   603
d6faa02b3802 7121373: Clean up CollectedHeap::is_in
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diff changeset
   604
  // Test that a pointer to after the heap end is reported as outside the heap.
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   605
  assert(heap_end <= ((uintptr_t)-1 - epsilon), "sanity");
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diff changeset
   606
  void* after_heap = (void*)(heap_end + epsilon);
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   607
  assert(!heap->is_in(after_heap),
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   608
      err_msg("after_heap: " PTR_FORMAT " is unexpectedly in the heap", after_heap));
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   609
}
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   610
#endif