--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/services/virtualMemoryTracker.hpp Thu Aug 07 12:18:58 2014 -0700
@@ -0,0 +1,437 @@
+/*
+ * 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;
+ }
+
+ void reset() {
+ _reserved = 0;
+ _committed = 0;
+ }
+
+ 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;
+ }
+
+ inline void reset() {
+ for (int index = 0; index < mt_number_of_types; index ++) {
+ _virtual_memory[index].reset();
+ }
+ }
+
+ 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 inline void reset() {
+ as_snapshot()->reset();
+ }
+
+ 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()) ||
+ adjacent_to (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(emptyStack), _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);
+
+ 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