Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.

  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

  *

  * This code is free software; you can redistribute it and/or modify it

  * 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

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

  * version 2 for more details (a copy is included in the LICENSE file that

  * accompanied this code).

  *

  * You should have received a copy of the GNU General Public License version

  * 2 along with this work; if not, write to the Free Software Foundation,

  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

  *

  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

  * or visit www.oracle.com if you need additional information or have any

  * questions.

  *

  */

 #include "precompiled.hpp"

 #include "runtime/atomic.hpp"

 #include "services/memBaseline.hpp"

 #include "services/memRecorder.hpp"

 #include "services/memPtr.hpp"

 #include "services/memTracker.hpp"

 MemPointer* SequencedRecordIterator::next_record() {

   MemPointerRecord* itr_cur = (MemPointerRecord*)_itr.current();

   if (itr_cur == NULL)  {

     return itr_cur;

   }

   MemPointerRecord* itr_next = (MemPointerRecord*)_itr.next();

   // don't collapse virtual memory records

   while (itr_next != NULL && !itr_cur->is_vm_pointer() &&

     !itr_next->is_vm_pointer() &&

     same_kind(itr_cur, itr_next)) {

     itr_cur = itr_next;

     itr_next = (MemPointerRecord*)_itr.next();

   }

   return itr_cur;

 }

 volatile jint MemRecorder::_instance_count = 0;

 MemRecorder::MemRecorder() {

   assert(MemTracker::is_on(), "Native memory tracking is off");

   Atomic::inc(&_instance_count);

   set_generation();

   if (MemTracker::track_callsite()) {

     _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx,

         DEFAULT_RECORDER_PTR_ARRAY_SIZE>();

   } else {

     _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord,

         DEFAULT_RECORDER_PTR_ARRAY_SIZE>();

   }

   _next = NULL;

   if (_pointer_records != NULL) {

     // recode itself

     address pc = CURRENT_PC;

     record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),

         sizeof(MemRecorder), SequenceGenerator::next(), pc);

     record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),

         _pointer_records->instance_size(), SequenceGenerator::next(), pc);

   }

 }

 MemRecorder::~MemRecorder() {

   if (_pointer_records != NULL) {

     if (MemTracker::is_on()) {

       MemTracker::record_free((address)_pointer_records, mtNMT);

       MemTracker::record_free((address)this, mtNMT);

     }

     delete _pointer_records;

   }

   // delete all linked recorders

   while (_next != NULL) {

     MemRecorder* tmp = _next;

     _next = _next->next();

     tmp->set_next(NULL);

     delete tmp;

   }

   Atomic::dec(&_instance_count);

 }

 // Sorting order:

 //   1. memory block address

 //   2. mem pointer record tags

 //   3. sequence number

 int MemRecorder::sort_record_fn(const void* e1, const void* e2) {

   const MemPointerRecord* p1 = (const MemPointerRecord*)e1;

   const MemPointerRecord* p2 = (const MemPointerRecord*)e2;

   int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr());

   if (delta == 0) {

     int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks),

                               (p2->flags() & MemPointerRecord::tag_masks));

     if (df == 0) {

       assert(p1->seq() != p2->seq(), "dup seq");

       return p1->seq() - p2->seq();

     } else {

       return df;

     }

   } else {

     return delta;

   }

 }

 bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, jint seq, address pc) {

   assert(seq > 0, "No sequence number");

 #ifdef ASSERT

   if (MemPointerRecord::is_virtual_memory_record(flags)) {

     assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record");

   } else {

     assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() ||

            (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() ||

            IS_ARENA_OBJ(flags),

            "bad malloc record");

   }

   // a recorder should only hold records within the same generation

   unsigned long cur_generation = SequenceGenerator::current_generation();

   assert(cur_generation == _generation,

          "this thread did not enter sync point");

 #endif

   if (MemTracker::track_callsite()) {

     SeqMemPointerRecordEx ap(p, flags, size, seq, pc);

     debug_only(check_dup_seq(ap.seq());)

     return _pointer_records->append(&ap);

   } else {

     SeqMemPointerRecord ap(p, flags, size, seq);

     debug_only(check_dup_seq(ap.seq());)

     return _pointer_records->append(&ap);

   }

 }

   // iterator for alloc pointers

 SequencedRecordIterator MemRecorder::pointer_itr() {

   assert(_pointer_records != NULL, "just check");

   _pointer_records->sort((FN_SORT)sort_record_fn);

   return SequencedRecordIterator(_pointer_records);

 }

 void MemRecorder::set_generation() {

   _generation = SequenceGenerator::current_generation();

 }

 #ifdef ASSERT

 void MemRecorder::check_dup_seq(jint seq) const {

   MemPointerArrayIteratorImpl itr(_pointer_records);

   MemPointerRecord* rc = (MemPointerRecord*)itr.current();

   while (rc != NULL) {

     assert(rc->seq() != seq, "dup seq");

     rc = (MemPointerRecord*)itr.next();

   }

 }

 #endif