author | zgu |
Wed, 01 Aug 2012 17:19:30 -0400 | |
changeset 13470 | a99b4dc12f9b |
parent 13195 | be27e1b6a4b9 |
child 13744 | 631fe815def5 |
permissions | -rw-r--r-- |
13195 | 1 |
/* |
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* Copyright (c) 2012, 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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#ifndef SHARE_VM_SERVICES_MEM_SNAPSHOT_HPP |
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#define SHARE_VM_SERVICES_MEM_SNAPSHOT_HPP |
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#include "memory/allocation.hpp" |
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#include "runtime/mutex.hpp" |
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#include "runtime/mutexLocker.hpp" |
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#include "services/memBaseline.hpp" |
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#include "services/memPtrArray.hpp" |
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// Snapshot pointer array iterator |
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// The pointer array contains malloc-ed pointers |
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class MemPointerIterator : public MemPointerArrayIteratorImpl { |
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public: |
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MemPointerIterator(MemPointerArray* arr): |
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MemPointerArrayIteratorImpl(arr) { |
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assert(arr != NULL, "null array"); |
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} |
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#ifdef ASSERT |
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virtual bool is_dup_pointer(const MemPointer* ptr1, |
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const MemPointer* ptr2) const { |
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MemPointerRecord* p1 = (MemPointerRecord*)ptr1; |
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MemPointerRecord* p2 = (MemPointerRecord*)ptr2; |
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if (p1->addr() != p2->addr()) return false; |
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if ((p1->flags() & MemPointerRecord::tag_masks) != |
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(p2->flags() & MemPointerRecord::tag_masks)) { |
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return false; |
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} |
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// we do see multiple commit/uncommit on the same memory, it is ok |
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return (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_alloc || |
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(p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_release; |
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} |
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virtual bool insert(MemPointer* ptr) { |
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if (_pos > 0) { |
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MemPointer* p1 = (MemPointer*)ptr; |
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MemPointer* p2 = (MemPointer*)_array->at(_pos - 1); |
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assert(!is_dup_pointer(p1, p2), |
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13470
a99b4dc12f9b
7185614: NMT ON: "check by caller" assertion failed on nsk ThreadMXBean test
zgu
parents:
13195
diff
changeset
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err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
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} |
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if (_pos < _array->length() -1) { |
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MemPointer* p1 = (MemPointer*)ptr; |
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MemPointer* p2 = (MemPointer*)_array->at(_pos + 1); |
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assert(!is_dup_pointer(p1, p2), |
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13470
a99b4dc12f9b
7185614: NMT ON: "check by caller" assertion failed on nsk ThreadMXBean test
zgu
parents:
13195
diff
changeset
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err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
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} |
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return _array->insert_at(ptr, _pos); |
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} |
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virtual bool insert_after(MemPointer* ptr) { |
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if (_pos > 0) { |
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MemPointer* p1 = (MemPointer*)ptr; |
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MemPointer* p2 = (MemPointer*)_array->at(_pos - 1); |
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assert(!is_dup_pointer(p1, p2), |
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13470
a99b4dc12f9b
7185614: NMT ON: "check by caller" assertion failed on nsk ThreadMXBean test
zgu
parents:
13195
diff
changeset
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err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
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} |
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if (_pos < _array->length() - 1) { |
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MemPointer* p1 = (MemPointer*)ptr; |
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MemPointer* p2 = (MemPointer*)_array->at(_pos + 1); |
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assert(!is_dup_pointer(p1, p2), |
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13470
a99b4dc12f9b
7185614: NMT ON: "check by caller" assertion failed on nsk ThreadMXBean test
zgu
parents:
13195
diff
changeset
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err_msg("duplicated pointer, flag = [%x]", (unsigned int)((MemPointerRecord*)p1)->flags())); |
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} |
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if (_array->insert_at(ptr, _pos + 1)) { |
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_pos ++; |
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return true; |
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} |
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return false; |
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} |
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#endif |
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virtual MemPointer* locate(address addr) { |
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MemPointer* cur = current(); |
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while (cur != NULL && cur->addr() < addr) { |
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cur = next(); |
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} |
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return cur; |
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} |
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}; |
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class VMMemPointerIterator : public MemPointerIterator { |
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public: |
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VMMemPointerIterator(MemPointerArray* arr): |
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MemPointerIterator(arr) { |
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} |
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// locate an exiting record that contains specified address, or |
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// the record, where the record with specified address, should |
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// be inserted |
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virtual MemPointer* locate(address addr) { |
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VMMemRegion* cur = (VMMemRegion*)current(); |
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VMMemRegion* next_p; |
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while (cur != NULL) { |
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if (cur->base() > addr) { |
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return cur; |
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} else { |
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// find nearest existing range that has base address <= addr |
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next_p = (VMMemRegion*)peek_next(); |
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if (next_p != NULL && next_p->base() <= addr) { |
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cur = (VMMemRegion*)next(); |
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continue; |
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} |
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} |
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if (cur->is_reserve_record() && |
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cur->base() <= addr && |
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(cur->base() + cur->size() > addr)) { |
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return cur; |
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} else if (cur->is_commit_record() && |
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cur->base() <= addr && |
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(cur->base() + cur->committed_size() > addr)) { |
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return cur; |
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} |
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cur = (VMMemRegion*)next(); |
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} |
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return NULL; |
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} |
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#ifdef ASSERT |
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virtual bool is_dup_pointer(const MemPointer* ptr1, |
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const MemPointer* ptr2) const { |
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VMMemRegion* p1 = (VMMemRegion*)ptr1; |
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VMMemRegion* p2 = (VMMemRegion*)ptr2; |
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if (p1->addr() != p2->addr()) return false; |
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if ((p1->flags() & MemPointerRecord::tag_masks) != |
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(p2->flags() & MemPointerRecord::tag_masks)) { |
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return false; |
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} |
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// we do see multiple commit/uncommit on the same memory, it is ok |
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return (p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_alloc || |
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(p1->flags() & MemPointerRecord::tag_masks) == MemPointerRecord::tag_release; |
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} |
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#endif |
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}; |
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class StagingWalker : public MemPointerArrayIterator { |
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private: |
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MemPointerArrayIteratorImpl _itr; |
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bool _is_vm_record; |
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bool _end_of_array; |
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VMMemRegionEx _vm_record; |
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MemPointerRecordEx _malloc_record; |
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public: |
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StagingWalker(MemPointerArray* arr): _itr(arr) { |
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_end_of_array = false; |
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next(); |
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} |
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// return the pointer at current position |
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MemPointer* current() const { |
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if (_end_of_array) { |
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return NULL; |
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} |
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if (is_vm_record()) { |
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return (MemPointer*)&_vm_record; |
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} else { |
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return (MemPointer*)&_malloc_record; |
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} |
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} |
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// return the next pointer and advance current position |
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MemPointer* next(); |
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// type of 'current' record |
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bool is_vm_record() const { |
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return _is_vm_record; |
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} |
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// return the next poinger without advancing current position |
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MemPointer* peek_next() const { |
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assert(false, "not supported"); |
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return NULL; |
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} |
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MemPointer* peek_prev() const { |
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assert(false, "not supported"); |
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return NULL; |
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} |
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// remove the pointer at current position |
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void remove() { |
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assert(false, "not supported"); |
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} |
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// insert the pointer at current position |
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bool insert(MemPointer* ptr) { |
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assert(false, "not supported"); |
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return false; |
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} |
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bool insert_after(MemPointer* ptr) { |
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assert(false, "not supported"); |
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return false; |
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} |
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private: |
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// consolidate all records referring to this vm region |
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bool consolidate_vm_records(VMMemRegionEx* vm_rec); |
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}; |
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class MemBaseline; |
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class MemSnapshot : public CHeapObj<mtNMT> { |
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private: |
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// the following two arrays contain records of all known lived memory blocks |
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// live malloc-ed memory pointers |
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MemPointerArray* _alloc_ptrs; |
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// live virtual memory pointers |
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MemPointerArray* _vm_ptrs; |
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// stagging a generation's data, before |
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// it can be prompted to snapshot |
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MemPointerArray* _staging_area; |
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// the lock to protect this snapshot |
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Monitor* _lock; |
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NOT_PRODUCT(size_t _untracked_count;) |
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friend class MemBaseline; |
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public: |
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MemSnapshot(); |
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virtual ~MemSnapshot(); |
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// if we are running out of native memory |
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bool out_of_memory() const { |
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return (_alloc_ptrs == NULL || _staging_area == NULL || |
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_vm_ptrs == NULL || _lock == NULL || |
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_alloc_ptrs->out_of_memory() || |
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_staging_area->out_of_memory() || |
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_vm_ptrs->out_of_memory()); |
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} |
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// merge a per-thread memory recorder into staging area |
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bool merge(MemRecorder* rec); |
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// promote staged data to snapshot |
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void promote(); |
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void wait(long timeout) { |
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assert(_lock != NULL, "Just check"); |
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MonitorLockerEx locker(_lock); |
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locker.wait(true, timeout); |
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} |
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NOT_PRODUCT(void print_snapshot_stats(outputStream* st);) |
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NOT_PRODUCT(void check_staging_data();) |
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NOT_PRODUCT(void check_malloc_pointers();) |
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NOT_PRODUCT(bool has_allocation_record(address addr);) |
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private: |
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// copy pointer data from src to dest |
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void copy_pointer(MemPointerRecord* dest, const MemPointerRecord* src); |
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}; |
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#endif // SHARE_VM_SERVICES_MEM_SNAPSHOT_HPP |