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

 /*

  * Copyright (c) 2014, 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 "runtime/atomic.inline.hpp"

 #include "services/mallocSiteTable.hpp"

 #include "services/mallocTracker.hpp"

 #include "services/mallocTracker.inline.hpp"

 #include "services/memTracker.hpp"

 size_t MallocMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)];

 // Total malloc'd memory amount

 size_t MallocMemorySnapshot::total() const {

   size_t amount = 0;

   for (int index = 0; index < mt_number_of_types; index ++) {

     amount += _malloc[index].malloc_size();

   }

   amount += _tracking_header.size() + total_arena();

   return amount;

 }

 // Total malloc'd memory used by arenas

 size_t MallocMemorySnapshot::total_arena() const {

   size_t amount = 0;

   for (int index = 0; index < mt_number_of_types; index ++) {

     amount += _malloc[index].arena_size();

   }

   return amount;

 }

 void MallocMemorySnapshot::reset() {

   _tracking_header.reset();

   for (int index = 0; index < mt_number_of_types; index ++) {

     _malloc[index].reset();

   }

 }

 // Make adjustment by subtracting chunks used by arenas

 // from total chunks to get total free chunck size

 void MallocMemorySnapshot::make_adjustment() {

   size_t arena_size = total_arena();

   int chunk_idx = NMTUtil::flag_to_index(mtChunk);

   _malloc[chunk_idx].record_free(arena_size);

 }

 void MallocMemorySummary::initialize() {

   assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check");

   // Uses placement new operator to initialize static area.

   ::new ((void*)_snapshot)MallocMemorySnapshot();

 }

 void MallocHeader::release() const {

   // Tracking already shutdown, no housekeeping is needed anymore

   if (MemTracker::tracking_level() <= NMT_minimal) return;

   MallocMemorySummary::record_free(size(), flags());

   MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader));

   if (tracking_level() == NMT_detail) {

     MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx);

   }

 }

 bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size,

   size_t* bucket_idx, size_t* pos_idx) const {

   bool ret =  MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx);

   // Something went wrong, could be OOM or overflow malloc site table.

   // We want to keep tracking data under OOM circumstance, so transition to

   // summary tracking.

   if (!ret) {

     MemTracker::transition_to(NMT_summary);

   }

   return ret;

 }

 bool MallocHeader::get_stack(NativeCallStack& stack) const {

   return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx);

 }

 bool MallocTracker::initialize(NMT_TrackingLevel level) {

   if (level >= NMT_summary) {

     MallocMemorySummary::initialize();

   }

   if (level == NMT_detail) {

     return MallocSiteTable::initialize();

   }

   return true;

 }

 bool MallocTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) {

   assert(from != NMT_off, "Can not transition from off state");

   assert(to != NMT_off, "Can not transition to off state");

   if (from == NMT_minimal) {

     MallocMemorySummary::reset();

   }

   if (to == NMT_detail) {

     assert(from == NMT_minimal || from == NMT_summary, "Just check");

     return MallocSiteTable::initialize();

   } else if (from == NMT_detail) {

     assert(to == NMT_minimal || to == NMT_summary, "Just check");

     MallocSiteTable::shutdown();

   }

   return true;

 }

 // Record a malloc memory allocation

 void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags,

   const NativeCallStack& stack, NMT_TrackingLevel level) {

   void*         memblock;      // the address for user data

   MallocHeader* header = NULL;

   if (malloc_base == NULL) {

     return NULL;

   }

   // Check malloc size, size has to <= MAX_MALLOC_SIZE. This is only possible on 32-bit

   // systems, when malloc size >= 1GB, but is is safe to assume it won't happen.

   if (size > MAX_MALLOC_SIZE) {

     fatal("Should not use malloc for big memory block, use virtual memory instead");

   }

   // Uses placement global new operator to initialize malloc header

   switch(level) {

     case NMT_off:

       return malloc_base;

     case NMT_minimal: {

       MallocHeader* hdr = ::new (malloc_base) MallocHeader();

       break;

     }

     case NMT_summary: {

       header = ::new (malloc_base) MallocHeader(size, flags);

       break;

     }

     case NMT_detail: {

       header = ::new (malloc_base) MallocHeader(size, flags, stack);

       break;

     }

     default:

       ShouldNotReachHere();

   }

   memblock = (void*)((char*)malloc_base + sizeof(MallocHeader));

   // The alignment check: 8 bytes alignment for 32 bit systems.

   //                      16 bytes alignment for 64-bit systems.

   assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check");

   // Sanity check

   assert(get_memory_tracking_level(memblock) == level,

     "Wrong tracking level");

 #ifdef ASSERT

   if (level > NMT_minimal) {

     // Read back

     assert(get_size(memblock) == size,   "Wrong size");

     assert(get_flags(memblock) == flags, "Wrong flags");

   }

 #endif

   return memblock;

 }

 void* MallocTracker::record_free(void* memblock) {

   // Never turned on

   if (MemTracker::tracking_level() == NMT_off ||

       memblock == NULL) {

     return memblock;

   }

   MallocHeader* header = malloc_header(memblock);

   header->release();

   return (void*)header;

 }