author | coleenp |
Thu, 25 Sep 2014 07:52:32 -0400 | |
changeset 26925 | c77fdcf78eeb |
parent 25946 | 1572c9f03fb9 |
child 27162 | 0a4a7276949b |
permissions | -rw-r--r-- |
25946 | 1 |
/* |
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* Copyright (c) 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 "runtime/atomic.hpp" |
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#include "runtime/atomic.inline.hpp" |
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#include "services/mallocSiteTable.hpp" |
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#include "services/mallocTracker.hpp" |
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#include "services/mallocTracker.inline.hpp" |
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#include "services/memTracker.hpp" |
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size_t MallocMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)]; |
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// Total malloc'd memory amount |
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size_t MallocMemorySnapshot::total() const { |
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size_t amount = 0; |
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for (int index = 0; index < mt_number_of_types; index ++) { |
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amount += _malloc[index].malloc_size(); |
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} |
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amount += _tracking_header.size() + total_arena(); |
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return amount; |
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} |
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// Total malloc'd memory used by arenas |
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size_t MallocMemorySnapshot::total_arena() const { |
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size_t amount = 0; |
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for (int index = 0; index < mt_number_of_types; index ++) { |
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amount += _malloc[index].arena_size(); |
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} |
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return amount; |
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} |
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void MallocMemorySnapshot::reset() { |
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_tracking_header.reset(); |
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for (int index = 0; index < mt_number_of_types; index ++) { |
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_malloc[index].reset(); |
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} |
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} |
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// Make adjustment by subtracting chunks used by arenas |
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// from total chunks to get total free chunck size |
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void MallocMemorySnapshot::make_adjustment() { |
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size_t arena_size = total_arena(); |
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int chunk_idx = NMTUtil::flag_to_index(mtChunk); |
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_malloc[chunk_idx].record_free(arena_size); |
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} |
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void MallocMemorySummary::initialize() { |
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assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check"); |
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// Uses placement new operator to initialize static area. |
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::new ((void*)_snapshot)MallocMemorySnapshot(); |
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} |
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void MallocHeader::release() const { |
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// Tracking already shutdown, no housekeeping is needed anymore |
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if (MemTracker::tracking_level() <= NMT_minimal) return; |
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MallocMemorySummary::record_free(size(), flags()); |
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MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader)); |
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if (tracking_level() == NMT_detail) { |
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MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx); |
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} |
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} |
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bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size, |
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size_t* bucket_idx, size_t* pos_idx) const { |
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bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx); |
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// Something went wrong, could be OOM or overflow malloc site table. |
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// We want to keep tracking data under OOM circumstance, so transition to |
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// summary tracking. |
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if (!ret) { |
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MemTracker::transition_to(NMT_summary); |
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} |
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return ret; |
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} |
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bool MallocHeader::get_stack(NativeCallStack& stack) const { |
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return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx); |
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} |
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bool MallocTracker::initialize(NMT_TrackingLevel level) { |
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if (level >= NMT_summary) { |
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MallocMemorySummary::initialize(); |
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} |
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if (level == NMT_detail) { |
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return MallocSiteTable::initialize(); |
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} |
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return true; |
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} |
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bool MallocTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) { |
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assert(from != NMT_off, "Can not transition from off state"); |
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assert(to != NMT_off, "Can not transition to off state"); |
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if (from == NMT_minimal) { |
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MallocMemorySummary::reset(); |
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} |
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if (to == NMT_detail) { |
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assert(from == NMT_minimal || from == NMT_summary, "Just check"); |
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return MallocSiteTable::initialize(); |
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} else if (from == NMT_detail) { |
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assert(to == NMT_minimal || to == NMT_summary, "Just check"); |
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MallocSiteTable::shutdown(); |
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} |
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return true; |
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} |
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// Record a malloc memory allocation |
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void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags, |
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const NativeCallStack& stack, NMT_TrackingLevel level) { |
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void* memblock; // the address for user data |
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MallocHeader* header = NULL; |
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if (malloc_base == NULL) { |
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return NULL; |
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} |
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// Uses placement global new operator to initialize malloc header |
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switch(level) { |
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case NMT_off: |
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return malloc_base; |
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case NMT_minimal: { |
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MallocHeader* hdr = ::new (malloc_base) MallocHeader(); |
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break; |
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} |
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case NMT_summary: { |
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26925
c77fdcf78eeb
8058818: Allocation of more then 1G of memory using Unsafe.allocateMemory is still causing a fatal error on 32bit platforms
coleenp
parents:
25946
diff
changeset
|
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assert(size <= MAX_MALLOC_SIZE, "malloc size overrun for NMT"); |
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header = ::new (malloc_base) MallocHeader(size, flags); |
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break; |
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} |
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case NMT_detail: { |
|
26925
c77fdcf78eeb
8058818: Allocation of more then 1G of memory using Unsafe.allocateMemory is still causing a fatal error on 32bit platforms
coleenp
parents:
25946
diff
changeset
|
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assert(size <= MAX_MALLOC_SIZE, "malloc size overrun for NMT"); |
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header = ::new (malloc_base) MallocHeader(size, flags, stack); |
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break; |
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} |
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default: |
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ShouldNotReachHere(); |
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} |
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memblock = (void*)((char*)malloc_base + sizeof(MallocHeader)); |
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// The alignment check: 8 bytes alignment for 32 bit systems. |
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// 16 bytes alignment for 64-bit systems. |
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assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check"); |
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// Sanity check |
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assert(get_memory_tracking_level(memblock) == level, |
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"Wrong tracking level"); |
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#ifdef ASSERT |
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if (level > NMT_minimal) { |
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// Read back |
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assert(get_size(memblock) == size, "Wrong size"); |
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assert(get_flags(memblock) == flags, "Wrong flags"); |
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} |
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#endif |
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return memblock; |
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} |
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void* MallocTracker::record_free(void* memblock) { |
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// Never turned on |
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if (MemTracker::tracking_level() == NMT_off || |
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memblock == NULL) { |
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return memblock; |
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} |
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MallocHeader* header = malloc_header(memblock); |
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header->release(); |
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return (void*)header; |
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} |
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