jdk8-mips64-public/hotspot: src/share/vm/services/virtualMemoryTracker.cpp@427b2fb1944f (annotated)

src/share/vm/services/virtualMemoryTracker.cpp@427b2fb1944f (annotated)

src/share/vm/services/virtualMemoryTracker.cpp

Wed, 31 Jan 2018 19:24:57 -0500

author: dbuck
date: Wed, 31 Jan 2018 19:24:57 -0500
changeset 9289: 427b2fb1944f
parent 7267: 417e3b8d04c5
child 9485: 7a6239517d46
permissions: -rw-r--r--

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

 /*
  * 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, NativeCallStack::EMPTY_STACK);
           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::late_initialize(NMT_TrackingLevel level) {
   if (level >= NMT_summary) {
     _reserved_regions = new (std::nothrow, ResourceObj::C_HEAP, mtNMT)
       SortedLinkedList<ReservedMemoryRegion, compare_reserved_region_base>();
     return (_reserved_regions != NULL);
   }
   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");
   assert(_reserved_regions != NULL, "Sanity check");
   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;
       }
       // CDS mapping region.
       // CDS reserves the whole region for mapping CDS archive, then maps each section into the region.
       // NMT reports CDS as a whole.
       if (reserved_rgn->flag() == mtClassShared) {
         assert(reserved_rgn->contain_region(base_addr, size), "Reserved CDS region should contain this mapping region");
         return true;
       }
       ShouldNotReachHere();
       return false;
     }
   }
 }
 void VirtualMemoryTracker::set_reserved_region_type(address addr, MEMFLAGS flag) {
   assert(addr != NULL, "Invalid address");
   assert(_reserved_regions != NULL, "Sanity check");
   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");
   assert(_reserved_regions != NULL, "Sanity check");
   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");
   assert(_reserved_regions != NULL, "Sanity check");
   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");
   assert(_reserved_regions != NULL, "Sanity check");
   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) {
   assert(_reserved_regions != NULL, "Sanity check");
   ThreadCritical tc;
   // Check that the _reserved_regions haven't been deleted.
   if (_reserved_regions != NULL) {
     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) {
   assert (from != NMT_minimal, "cannot convert from the lowest tracking level to anything");
   if (to == NMT_minimal) {
     assert(from == NMT_summary || from == NMT_detail, "Just check");
     // Clean up virtual memory tracking data structures.
     ThreadCritical tc;
     // Check for potential race with other thread calling transition
     if (_reserved_regions != NULL) {
       delete _reserved_regions;
       _reserved_regions = NULL;
     }
   }
   return true;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/virtualMemoryTracker.cpp@427b2fb1944f (annotated)

src/share/vm/services/virtualMemoryTracker.cpp