| /* |
| * Copyright (c) 2013, 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_SERVICES_VIRTUAL_MEMORY_TRACKER_HPP |
| #define SHARE_VM_SERVICES_VIRTUAL_MEMORY_TRACKER_HPP |
| |
| #if INCLUDE_NMT |
| |
| #include "memory/allocation.hpp" |
| #include "services/allocationSite.hpp" |
| #include "services/nmtCommon.hpp" |
| #include "utilities/linkedlist.hpp" |
| #include "utilities/nativeCallStack.hpp" |
| #include "utilities/ostream.hpp" |
| |
| |
| /* |
| * Virtual memory counter |
| */ |
| class VirtualMemory VALUE_OBJ_CLASS_SPEC { |
| private: |
| size_t _reserved; |
| size_t _committed; |
| |
| public: |
| VirtualMemory() : _reserved(0), _committed(0) { } |
| |
| inline void reserve_memory(size_t sz) { _reserved += sz; } |
| inline void commit_memory (size_t sz) { |
| _committed += sz; |
| assert(_committed <= _reserved, "Sanity check"); |
| } |
| |
| inline void release_memory (size_t sz) { |
| assert(_reserved >= sz, "Negative amount"); |
| _reserved -= sz; |
| } |
| |
| inline void uncommit_memory(size_t sz) { |
| assert(_committed >= sz, "Negative amount"); |
| _committed -= sz; |
| } |
| |
| inline size_t reserved() const { return _reserved; } |
| inline size_t committed() const { return _committed; } |
| }; |
| |
| // Virtual memory allocation site, keeps track where the virtual memory is reserved. |
| class VirtualMemoryAllocationSite : public AllocationSite<VirtualMemory> { |
| public: |
| VirtualMemoryAllocationSite(const NativeCallStack& stack) : |
| AllocationSite<VirtualMemory>(stack) { } |
| |
| inline void reserve_memory(size_t sz) { data()->reserve_memory(sz); } |
| inline void commit_memory (size_t sz) { data()->commit_memory(sz); } |
| inline void uncommit_memory(size_t sz) { data()->uncommit_memory(sz); } |
| inline void release_memory(size_t sz) { data()->release_memory(sz); } |
| inline size_t reserved() const { return peek()->reserved(); } |
| inline size_t committed() const { return peek()->committed(); } |
| }; |
| |
| class VirtualMemorySummary; |
| |
| // This class represents a snapshot of virtual memory at a given time. |
| // The latest snapshot is saved in a static area. |
| class VirtualMemorySnapshot : public ResourceObj { |
| friend class VirtualMemorySummary; |
| |
| private: |
| VirtualMemory _virtual_memory[mt_number_of_types]; |
| |
| public: |
| inline VirtualMemory* by_type(MEMFLAGS flag) { |
| int index = NMTUtil::flag_to_index(flag); |
| return &_virtual_memory[index]; |
| } |
| |
| inline VirtualMemory* by_index(int index) { |
| assert(index >= 0, "Index out of bound"); |
| assert(index < mt_number_of_types, "Index out of bound"); |
| return &_virtual_memory[index]; |
| } |
| |
| inline size_t total_reserved() const { |
| size_t amount = 0; |
| for (int index = 0; index < mt_number_of_types; index ++) { |
| amount += _virtual_memory[index].reserved(); |
| } |
| return amount; |
| } |
| |
| inline size_t total_committed() const { |
| size_t amount = 0; |
| for (int index = 0; index < mt_number_of_types; index ++) { |
| amount += _virtual_memory[index].committed(); |
| } |
| return amount; |
| } |
| |
| void copy_to(VirtualMemorySnapshot* s) { |
| for (int index = 0; index < mt_number_of_types; index ++) { |
| s->_virtual_memory[index] = _virtual_memory[index]; |
| } |
| } |
| }; |
| |
| class VirtualMemorySummary : AllStatic { |
| public: |
| static void initialize(); |
| |
| static inline void record_reserved_memory(size_t size, MEMFLAGS flag) { |
| as_snapshot()->by_type(flag)->reserve_memory(size); |
| } |
| |
| static inline void record_committed_memory(size_t size, MEMFLAGS flag) { |
| as_snapshot()->by_type(flag)->commit_memory(size); |
| } |
| |
| static inline void record_uncommitted_memory(size_t size, MEMFLAGS flag) { |
| as_snapshot()->by_type(flag)->uncommit_memory(size); |
| } |
| |
| static inline void record_released_memory(size_t size, MEMFLAGS flag) { |
| as_snapshot()->by_type(flag)->release_memory(size); |
| } |
| |
| // Move virtual memory from one memory type to another. |
| // Virtual memory can be reserved before it is associated with a memory type, and tagged |
| // as 'unknown'. Once the memory is tagged, the virtual memory will be moved from 'unknown' |
| // type to specified memory type. |
| static inline void move_reserved_memory(MEMFLAGS from, MEMFLAGS to, size_t size) { |
| as_snapshot()->by_type(from)->release_memory(size); |
| as_snapshot()->by_type(to)->reserve_memory(size); |
| } |
| |
| static inline void move_committed_memory(MEMFLAGS from, MEMFLAGS to, size_t size) { |
| as_snapshot()->by_type(from)->uncommit_memory(size); |
| as_snapshot()->by_type(to)->commit_memory(size); |
| } |
| |
| static inline void snapshot(VirtualMemorySnapshot* s) { |
| as_snapshot()->copy_to(s); |
| } |
| |
| static VirtualMemorySnapshot* as_snapshot() { |
| return (VirtualMemorySnapshot*)_snapshot; |
| } |
| |
| private: |
| static size_t _snapshot[CALC_OBJ_SIZE_IN_TYPE(VirtualMemorySnapshot, size_t)]; |
| }; |
| |
| |
| |
| /* |
| * A virtual memory region |
| */ |
| class VirtualMemoryRegion VALUE_OBJ_CLASS_SPEC { |
| private: |
| address _base_address; |
| size_t _size; |
| |
| public: |
| VirtualMemoryRegion(address addr, size_t size) : |
| _base_address(addr), _size(size) { |
| assert(addr != NULL, "Invalid address"); |
| assert(size > 0, "Invalid size"); |
| } |
| |
| inline address base() const { return _base_address; } |
| inline address end() const { return base() + size(); } |
| inline size_t size() const { return _size; } |
| |
| inline bool is_empty() const { return size() == 0; } |
| |
| inline bool contain_address(address addr) const { |
| return (addr >= base() && addr < end()); |
| } |
| |
| |
| inline bool contain_region(address addr, size_t size) const { |
| return contain_address(addr) && contain_address(addr + size - 1); |
| } |
| |
| inline bool same_region(address addr, size_t sz) const { |
| return (addr == base() && sz == size()); |
| } |
| |
| |
| inline bool overlap_region(address addr, size_t sz) const { |
| VirtualMemoryRegion rgn(addr, sz); |
| return contain_address(addr) || |
| contain_address(addr + sz - 1) || |
| rgn.contain_address(base()) || |
| rgn.contain_address(end() - 1); |
| } |
| |
| inline bool adjacent_to(address addr, size_t sz) const { |
| return (addr == end() || (addr + sz) == base()); |
| } |
| |
| void exclude_region(address addr, size_t sz) { |
| assert(contain_region(addr, sz), "Not containment"); |
| assert(addr == base() || addr + sz == end(), "Can not exclude from middle"); |
| size_t new_size = size() - sz; |
| |
| if (addr == base()) { |
| set_base(addr + sz); |
| } |
| set_size(new_size); |
| } |
| |
| void expand_region(address addr, size_t sz) { |
| assert(adjacent_to(addr, sz), "Not adjacent regions"); |
| if (base() == addr + sz) { |
| set_base(addr); |
| } |
| set_size(size() + sz); |
| } |
| |
| protected: |
| void set_base(address base) { |
| assert(base != NULL, "Sanity check"); |
| _base_address = base; |
| } |
| |
| void set_size(size_t size) { |
| assert(size > 0, "Sanity check"); |
| _size = size; |
| } |
| }; |
| |
| |
| class CommittedMemoryRegion : public VirtualMemoryRegion { |
| private: |
| NativeCallStack _stack; |
| |
| public: |
| CommittedMemoryRegion(address addr, size_t size, const NativeCallStack& stack) : |
| VirtualMemoryRegion(addr, size), _stack(stack) { } |
| |
| inline int compare(const CommittedMemoryRegion& rgn) const { |
| if (overlap_region(rgn.base(), rgn.size())) { |
| return 0; |
| } else { |
| if (base() == rgn.base()) { |
| return 0; |
| } else if (base() > rgn.base()) { |
| return 1; |
| } else { |
| return -1; |
| } |
| } |
| } |
| |
| inline bool equals(const CommittedMemoryRegion& rgn) const { |
| return compare(rgn) == 0; |
| } |
| |
| inline void set_call_stack(const NativeCallStack& stack) { _stack = stack; } |
| inline const NativeCallStack* call_stack() const { return &_stack; } |
| }; |
| |
| |
| typedef LinkedListIterator<CommittedMemoryRegion> CommittedRegionIterator; |
| |
| int compare_committed_region(const CommittedMemoryRegion&, const CommittedMemoryRegion&); |
| class ReservedMemoryRegion : public VirtualMemoryRegion { |
| private: |
| SortedLinkedList<CommittedMemoryRegion, compare_committed_region> |
| _committed_regions; |
| |
| NativeCallStack _stack; |
| MEMFLAGS _flag; |
| |
| bool _all_committed; |
| |
| public: |
| ReservedMemoryRegion(address base, size_t size, const NativeCallStack& stack, |
| MEMFLAGS flag = mtNone) : |
| VirtualMemoryRegion(base, size), _stack(stack), _flag(flag), |
| _all_committed(false) { } |
| |
| |
| ReservedMemoryRegion(address base, size_t size) : |
| VirtualMemoryRegion(base, size), _stack(NativeCallStack::EMPTY_STACK), _flag(mtNone), |
| _all_committed(false) { } |
| |
| // Copy constructor |
| ReservedMemoryRegion(const ReservedMemoryRegion& rr) : |
| VirtualMemoryRegion(rr.base(), rr.size()) { |
| *this = rr; |
| } |
| |
| inline void set_call_stack(const NativeCallStack& stack) { _stack = stack; } |
| inline const NativeCallStack* call_stack() const { return &_stack; } |
| |
| void set_flag(MEMFLAGS flag); |
| inline MEMFLAGS flag() const { return _flag; } |
| |
| inline int compare(const ReservedMemoryRegion& rgn) const { |
| if (overlap_region(rgn.base(), rgn.size())) { |
| return 0; |
| } else { |
| if (base() == rgn.base()) { |
| return 0; |
| } else if (base() > rgn.base()) { |
| return 1; |
| } else { |
| return -1; |
| } |
| } |
| } |
| |
| inline bool equals(const ReservedMemoryRegion& rgn) const { |
| return compare(rgn) == 0; |
| } |
| |
| bool add_committed_region(address addr, size_t size, const NativeCallStack& stack); |
| bool remove_uncommitted_region(address addr, size_t size); |
| |
| size_t committed_size() const; |
| |
| // move committed regions that higher than specified address to |
| // the new region |
| void move_committed_regions(address addr, ReservedMemoryRegion& rgn); |
| |
| inline bool all_committed() const { return _all_committed; } |
| void set_all_committed(bool b); |
| |
| CommittedRegionIterator iterate_committed_regions() const { |
| return CommittedRegionIterator(_committed_regions.head()); |
| } |
| |
| ReservedMemoryRegion& operator= (const ReservedMemoryRegion& other) { |
| set_base(other.base()); |
| set_size(other.size()); |
| |
| _stack = *other.call_stack(); |
| _flag = other.flag(); |
| _all_committed = other.all_committed(); |
| if (other.all_committed()) { |
| set_all_committed(true); |
| } else { |
| CommittedRegionIterator itr = other.iterate_committed_regions(); |
| const CommittedMemoryRegion* rgn = itr.next(); |
| while (rgn != NULL) { |
| _committed_regions.add(*rgn); |
| rgn = itr.next(); |
| } |
| } |
| return *this; |
| } |
| |
| private: |
| // The committed region contains the uncommitted region, subtract the uncommitted |
| // region from this committed region |
| bool remove_uncommitted_region(LinkedListNode<CommittedMemoryRegion>* node, |
| address addr, size_t sz); |
| |
| bool add_committed_region(const CommittedMemoryRegion& rgn) { |
| assert(rgn.base() != NULL, "Invalid base address"); |
| assert(size() > 0, "Invalid size"); |
| return _committed_regions.add(rgn) != NULL; |
| } |
| }; |
| |
| int compare_reserved_region_base(const ReservedMemoryRegion& r1, const ReservedMemoryRegion& r2); |
| |
| class VirtualMemoryWalker : public StackObj { |
| public: |
| virtual bool do_allocation_site(const ReservedMemoryRegion* rgn) { return false; } |
| }; |
| |
| // Main class called from MemTracker to track virtual memory allocations, commits and releases. |
| class VirtualMemoryTracker : AllStatic { |
| public: |
| static bool initialize(NMT_TrackingLevel level); |
| |
| // Late phase initialization |
| static bool late_initialize(NMT_TrackingLevel level); |
| |
| static bool add_reserved_region (address base_addr, size_t size, const NativeCallStack& stack, |
| MEMFLAGS flag = mtNone, bool all_committed = false); |
| |
| static bool add_committed_region (address base_addr, size_t size, const NativeCallStack& stack); |
| static bool remove_uncommitted_region (address base_addr, size_t size); |
| static bool remove_released_region (address base_addr, size_t size); |
| static void set_reserved_region_type (address addr, MEMFLAGS flag); |
| |
| // Walk virtual memory data structure for creating baseline, etc. |
| static bool walk_virtual_memory(VirtualMemoryWalker* walker); |
| |
| static bool transition(NMT_TrackingLevel from, NMT_TrackingLevel to); |
| |
| private: |
| static SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>* _reserved_regions; |
| }; |
| |
| |
| #endif // INCLUDE_NMT |
| |
| #endif // SHARE_VM_SERVICES_VIRTUAL_MEMORY_TRACKER_HPP |