jdk8-mips64-public/hotspot: comparison src/share/vm/services/virtualMemoryTracker.cpp

-:4d3a43351904
+:833b0f92429a
+/*
+* 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.
+*
+*/
+#include "precompiled.hpp"
+#include "runtime/threadCritical.hpp"
+#include "services/virtualMemoryTracker.hpp"
+size_t VirtualMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(VirtualMemorySnapshot, size_t)];
+void VirtualMemorySummary::initialize() {
+assert(sizeof(_snapshot) >= sizeof(VirtualMemorySnapshot), "Sanity Check");
+// Use placement operator new to initialize static data area.
+::new ((void*)_snapshot) VirtualMemorySnapshot();
+}
+SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base> VirtualMemoryTracker::_reserved_regions;
+int compare_committed_region(const CommittedMemoryRegion& r1, const CommittedMemoryRegion& r2) {
+return r1.compare(r2);
+}
+int compare_reserved_region_base(const ReservedMemoryRegion& r1, const ReservedMemoryRegion& r2) {
+return r1.compare(r2);
+}
+bool ReservedMemoryRegion::add_committed_region(address addr, size_t size, const NativeCallStack& stack) {
+assert(addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+assert(contain_region(addr, size), "Not contain this region");
+if (all_committed()) return true;
+CommittedMemoryRegion committed_rgn(addr, size, stack);
+LinkedListNode<CommittedMemoryRegion>* node = _committed_regions.find_node(committed_rgn);
+if (node != NULL) {
+CommittedMemoryRegion* rgn = node->data();
+if (rgn->same_region(addr, size)) {
+return true;
+}
+if (rgn->adjacent_to(addr, size)) {
+// check if the next region covers this committed region,
+// the regions may not be merged due to different call stacks
+LinkedListNode<CommittedMemoryRegion>* next =
+node->next();
+if (next != NULL && next->data()->contain_region(addr, size)) {
+if (next->data()->same_region(addr, size)) {
+next->data()->set_call_stack(stack);
+}
+return true;
+}
+if (rgn->call_stack()->equals(stack)) {
+VirtualMemorySummary::record_uncommitted_memory(rgn->size(), flag());
+// the two adjacent regions have the same call stack, merge them
+rgn->expand_region(addr, size);
+VirtualMemorySummary::record_committed_memory(rgn->size(), flag());
+return true;
+}
+VirtualMemorySummary::record_committed_memory(size, flag());
+if (rgn->base() > addr) {
+return _committed_regions.insert_before(committed_rgn, node) != NULL;
+} else {
+return _committed_regions.insert_after(committed_rgn, node) != NULL;
+}
+}
+assert(rgn->contain_region(addr, size), "Must cover this region");
+return true;
+} else {
+// New committed region
+VirtualMemorySummary::record_committed_memory(size, flag());
+return add_committed_region(committed_rgn);
+}
+}
+void ReservedMemoryRegion::set_all_committed(bool b) {
+if (all_committed() != b) {
+_all_committed = b;
+if (b) {
+VirtualMemorySummary::record_committed_memory(size(), flag());
+}
+}
+}
+bool ReservedMemoryRegion::remove_uncommitted_region(LinkedListNode<CommittedMemoryRegion>* node,
+address addr, size_t size) {
+assert(addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+CommittedMemoryRegion* rgn = node->data();
+assert(rgn->contain_region(addr, size), "Has to be contained");
+assert(!rgn->same_region(addr, size), "Can not be the same region");
+if (rgn->base() == addr ||
+rgn->end() == addr + size) {
+rgn->exclude_region(addr, size);
+return true;
+} else {
+// split this region
+address top =rgn->end();
+// use this region for lower part
+size_t exclude_size = rgn->end() - addr;
+rgn->exclude_region(addr, exclude_size);
+// higher part
+address high_base = addr + size;
+size_t  high_size = top - high_base;
+CommittedMemoryRegion high_rgn(high_base, high_size, *rgn->call_stack());
+LinkedListNode<CommittedMemoryRegion>* high_node = _committed_regions.add(high_rgn);
+assert(high_node == NULL || node->next() == high_node, "Should be right after");
+return (high_node != NULL);
+}
+return false;
+}
+bool ReservedMemoryRegion::remove_uncommitted_region(address addr, size_t sz) {
+// uncommit stack guard pages
+if (flag() == mtThreadStack && !same_region(addr, sz)) {
+return true;
+}
+assert(addr != NULL, "Invalid address");
+assert(sz > 0, "Invalid size");
+if (all_committed()) {
+assert(_committed_regions.is_empty(), "Sanity check");
+assert(contain_region(addr, sz), "Reserved region does not contain this region");
+set_all_committed(false);
+VirtualMemorySummary::record_uncommitted_memory(sz, flag());
+if (same_region(addr, sz)) {
+return true;
+} else {
+CommittedMemoryRegion rgn(base(), size(), *call_stack());
+if (rgn.base() == addr || rgn.end() == (addr + sz)) {
+rgn.exclude_region(addr, sz);
+return add_committed_region(rgn);
+} else {
+// split this region
+// top of the whole region
+address top =rgn.end();
+// use this region for lower part
+size_t exclude_size = rgn.end() - addr;
+rgn.exclude_region(addr, exclude_size);
+if (add_committed_region(rgn)) {
+// higher part
+address high_base = addr + sz;
+size_t  high_size = top - high_base;
+CommittedMemoryRegion high_rgn(high_base, high_size, emptyStack);
+return add_committed_region(high_rgn);
+} else {
+return false;
+}
+}
+}
+} else {
+// we have to walk whole list to remove the committed regions in
+// specified range
+LinkedListNode<CommittedMemoryRegion>* head =
+_committed_regions.head();
+LinkedListNode<CommittedMemoryRegion>* prev = NULL;
+VirtualMemoryRegion uncommitted_rgn(addr, sz);
+while (head != NULL && !uncommitted_rgn.is_empty()) {
+CommittedMemoryRegion* crgn = head->data();
+// this committed region overlaps to region to uncommit
+if (crgn->overlap_region(uncommitted_rgn.base(), uncommitted_rgn.size())) {
+if (crgn->same_region(uncommitted_rgn.base(), uncommitted_rgn.size())) {
+// find matched region, remove the node will do
+VirtualMemorySummary::record_uncommitted_memory(uncommitted_rgn.size(), flag());
+_committed_regions.remove_after(prev);
+return true;
+} else if (crgn->contain_region(uncommitted_rgn.base(), uncommitted_rgn.size())) {
+// this committed region contains whole uncommitted region
+VirtualMemorySummary::record_uncommitted_memory(uncommitted_rgn.size(), flag());
+return remove_uncommitted_region(head, uncommitted_rgn.base(), uncommitted_rgn.size());
+} else if (uncommitted_rgn.contain_region(crgn->base(), crgn->size())) {
+// this committed region has been uncommitted
+size_t exclude_size = crgn->end() - uncommitted_rgn.base();
+uncommitted_rgn.exclude_region(uncommitted_rgn.base(), exclude_size);
+VirtualMemorySummary::record_uncommitted_memory(crgn->size(), flag());
+LinkedListNode<CommittedMemoryRegion>* tmp = head;
+head = head->next();
+_committed_regions.remove_after(prev);
+continue;
+} else if (crgn->contain_address(uncommitted_rgn.base())) {
+size_t toUncommitted = crgn->end() - uncommitted_rgn.base();
+crgn->exclude_region(uncommitted_rgn.base(), toUncommitted);
+uncommitted_rgn.exclude_region(uncommitted_rgn.base(), toUncommitted);
+VirtualMemorySummary::record_uncommitted_memory(toUncommitted, flag());
+} else if (uncommitted_rgn.contain_address(crgn->base())) {
+size_t toUncommitted = uncommitted_rgn.end() - crgn->base();
+crgn->exclude_region(crgn->base(), toUncommitted);
+uncommitted_rgn.exclude_region(uncommitted_rgn.end() - toUncommitted,
+toUncommitted);
+VirtualMemorySummary::record_uncommitted_memory(toUncommitted, flag());
+}
+}
+prev = head;
+head = head->next();
+}
+}
+return true;
+}
+void ReservedMemoryRegion::move_committed_regions(address addr, ReservedMemoryRegion& rgn) {
+assert(addr != NULL, "Invalid address");
+// split committed regions
+LinkedListNode<CommittedMemoryRegion>* head =
+_committed_regions.head();
+LinkedListNode<CommittedMemoryRegion>* prev = NULL;
+while (head != NULL) {
+if (head->data()->base() >= addr) {
+break;
+}
+prev = head;
+head = head->next();
+}
+if (head != NULL) {
+if (prev != NULL) {
+prev->set_next(head->next());
+} else {
+_committed_regions.set_head(NULL);
+}
+}
+rgn._committed_regions.set_head(head);
+}
+size_t ReservedMemoryRegion::committed_size() const {
+if (all_committed()) {
+return size();
+} else {
+size_t committed = 0;
+LinkedListNode<CommittedMemoryRegion>* head =
+_committed_regions.head();
+while (head != NULL) {
+committed += head->data()->size();
+head = head->next();
+}
+return committed;
+}
+}
+void ReservedMemoryRegion::set_flag(MEMFLAGS f) {
+assert((flag() == mtNone || flag() == f), "Overwrite memory type");
+if (flag() != f) {
+VirtualMemorySummary::move_reserved_memory(flag(), f, size());
+VirtualMemorySummary::move_committed_memory(flag(), f, committed_size());
+_flag = f;
+}
+}
+bool VirtualMemoryTracker::initialize(NMT_TrackingLevel level) {
+if (level >= NMT_summary) {
+VirtualMemorySummary::initialize();
+}
+return true;
+}
+bool VirtualMemoryTracker::add_reserved_region(address base_addr, size_t size,
+const NativeCallStack& stack, MEMFLAGS flag, bool all_committed) {
+assert(base_addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+ReservedMemoryRegion  rgn(base_addr, size, stack, flag);
+ReservedMemoryRegion* reserved_rgn = _reserved_regions.find(rgn);
+LinkedListNode<ReservedMemoryRegion>* node;
+if (reserved_rgn == NULL) {
+VirtualMemorySummary::record_reserved_memory(size, flag);
+node = _reserved_regions.add(rgn);
+if (node != NULL) {
+node->data()->set_all_committed(all_committed);
+return true;
+} else {
+return false;
+}
+} else {
+if (reserved_rgn->same_region(base_addr, size)) {
+reserved_rgn->set_call_stack(stack);
+reserved_rgn->set_flag(flag);
+return true;
+} else if (reserved_rgn->adjacent_to(base_addr, size)) {
+VirtualMemorySummary::record_reserved_memory(size, flag);
+reserved_rgn->expand_region(base_addr, size);
+reserved_rgn->set_call_stack(stack);
+return true;
+} else {
+// Overlapped reservation.
+// It can happen when the regions are thread stacks, as JNI
+// thread does not detach from VM before exits, and leads to
+// leak JavaThread object
+if (reserved_rgn->flag() == mtThreadStack) {
+guarantee(!CheckJNICalls, "Attached JNI thread exited without being detached");
+// Overwrite with new region
+// Release old region
+VirtualMemorySummary::record_uncommitted_memory(reserved_rgn->committed_size(), reserved_rgn->flag());
+VirtualMemorySummary::record_released_memory(reserved_rgn->size(), reserved_rgn->flag());
+// Add new region
+VirtualMemorySummary::record_reserved_memory(rgn.size(), flag);
+*reserved_rgn = rgn;
+return true;
+} else {
+ShouldNotReachHere();
+return false;
+}
+}
+}
+}
+void VirtualMemoryTracker::set_reserved_region_type(address addr, MEMFLAGS flag) {
+assert(addr != NULL, "Invalid address");
+ReservedMemoryRegion   rgn(addr, 1);
+ReservedMemoryRegion*  reserved_rgn = _reserved_regions.find(rgn);
+if (reserved_rgn != NULL) {
+assert(reserved_rgn->contain_address(addr), "Containment");
+if (reserved_rgn->flag() != flag) {
+assert(reserved_rgn->flag() == mtNone, "Overwrite memory type");
+reserved_rgn->set_flag(flag);
+}
+}
+}
+bool VirtualMemoryTracker::add_committed_region(address addr, size_t size,
+const NativeCallStack& stack) {
+assert(addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+ReservedMemoryRegion  rgn(addr, size);
+ReservedMemoryRegion* reserved_rgn = _reserved_regions.find(rgn);
+assert(reserved_rgn != NULL, "No reserved region");
+assert(reserved_rgn->contain_region(addr, size), "Not completely contained");
+return reserved_rgn->add_committed_region(addr, size, stack);
+}
+bool VirtualMemoryTracker::remove_uncommitted_region(address addr, size_t size) {
+assert(addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+ReservedMemoryRegion  rgn(addr, size);
+ReservedMemoryRegion* reserved_rgn = _reserved_regions.find(rgn);
+assert(reserved_rgn != NULL, "No reserved region");
+assert(reserved_rgn->contain_region(addr, size), "Not completely contained");
+return reserved_rgn->remove_uncommitted_region(addr, size);
+}
+bool VirtualMemoryTracker::remove_released_region(address addr, size_t size) {
+assert(addr != NULL, "Invalid address");
+assert(size > 0, "Invalid size");
+ReservedMemoryRegion  rgn(addr, size);
+ReservedMemoryRegion* reserved_rgn = _reserved_regions.find(rgn);
+assert(reserved_rgn != NULL, "No reserved region");
+// uncommit regions within the released region
+if (!reserved_rgn->remove_uncommitted_region(addr, size)) {
+return false;
+}
+VirtualMemorySummary::record_released_memory(size, reserved_rgn->flag());
+if (reserved_rgn->same_region(addr, size)) {
+return _reserved_regions.remove(rgn);
+} else {
+assert(reserved_rgn->contain_region(addr, size), "Not completely contained");
+if (reserved_rgn->base() == addr ||
+reserved_rgn->end() == addr + size) {
+reserved_rgn->exclude_region(addr, size);
+return true;
+} else {
+address top = reserved_rgn->end();
+address high_base = addr + size;
+ReservedMemoryRegion high_rgn(high_base, top - high_base,
+*reserved_rgn->call_stack(), reserved_rgn->flag());
+// use original region for lower region
+reserved_rgn->exclude_region(addr, top - addr);
+LinkedListNode<ReservedMemoryRegion>* new_rgn = _reserved_regions.add(high_rgn);
+if (new_rgn == NULL) {
+return false;
+} else {
+reserved_rgn->move_committed_regions(addr, *new_rgn->data());
+return true;
+}
+}
+}
+}
+bool VirtualMemoryTracker::walk_virtual_memory(VirtualMemoryWalker* walker) {
+ThreadCritical tc;
+LinkedListNode<ReservedMemoryRegion>* head = _reserved_regions.head();
+while (head != NULL) {
+const ReservedMemoryRegion* rgn = head->peek();
+if (!walker->do_allocation_site(rgn)) {
+return false;
+}
+head = head->next();
+}
+return true;
+}
+// Transition virtual memory tracking level.
+bool VirtualMemoryTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) {
+if (from == NMT_minimal) {
+assert(to == NMT_summary || to == NMT_detail, "Just check");
+VirtualMemorySummary::reset();
+} else if (to == NMT_minimal) {
+assert(from == NMT_summary || from == NMT_detail, "Just check");
+// Clean up virtual memory tracking data structures.
+ThreadCritical tc;
+_reserved_regions.clear();
+}
+return true;
+}

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/services/virtualMemoryTracker.cpp

src/share/vm/services/virtualMemoryTracker.cpp