Mercurial > hg > truffle
view src/share/vm/services/mallocTracker.cpp @ 21863:f4822d122041 jdk8u45-b11
Merge
author | asaha |
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date | Sat, 07 Mar 2015 16:26:10 -0800 |
parents | 787c9c28311f |
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/* * 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; } // 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 (MemTracker::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"); assert (from != NMT_minimal, "cannot transition from minimal state"); 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; } // Uses placement global new operator to initialize malloc header if (level == NMT_off) { return malloc_base; } header = ::new (malloc_base)MallocHeader(size, flags, stack, level); 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"); #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; }