--- a/hotspot/src/share/vm/services/memSnapshot.cpp Fri Aug 08 16:24:16 2014 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,748 +0,0 @@
-/*
- * Copyright (c) 2012, 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/mutexLocker.hpp"
-#include "utilities/decoder.hpp"
-#include "services/memBaseline.hpp"
-#include "services/memPtr.hpp"
-#include "services/memPtrArray.hpp"
-#include "services/memSnapshot.hpp"
-#include "services/memTracker.hpp"
-
-PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
-
-#ifdef ASSERT
-
-void decode_pointer_record(MemPointerRecord* rec) {
- tty->print("Pointer: [" PTR_FORMAT " - " PTR_FORMAT "] size = %d bytes", rec->addr(),
- rec->addr() + rec->size(), (int)rec->size());
- tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
- if (rec->is_vm_pointer()) {
- if (rec->is_allocation_record()) {
- tty->print_cr(" (reserve)");
- } else if (rec->is_commit_record()) {
- tty->print_cr(" (commit)");
- } else if (rec->is_uncommit_record()) {
- tty->print_cr(" (uncommit)");
- } else if (rec->is_deallocation_record()) {
- tty->print_cr(" (release)");
- } else {
- tty->print_cr(" (tag)");
- }
- } else {
- if (rec->is_arena_memory_record()) {
- tty->print_cr(" (arena size)");
- } else if (rec->is_allocation_record()) {
- tty->print_cr(" (malloc)");
- } else {
- tty->print_cr(" (free)");
- }
- }
- if (MemTracker::track_callsite()) {
- char buf[1024];
- address pc = ((MemPointerRecordEx*)rec)->pc();
- if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
- tty->print_cr("\tfrom %s", buf);
- } else {
- tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
- }
- }
-}
-
-void decode_vm_region_record(VMMemRegion* rec) {
- tty->print("VM Region [" PTR_FORMAT " - " PTR_FORMAT "]", rec->addr(),
- rec->addr() + rec->size());
- tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
- if (rec->is_allocation_record()) {
- tty->print_cr(" (reserved)");
- } else if (rec->is_commit_record()) {
- tty->print_cr(" (committed)");
- } else {
- ShouldNotReachHere();
- }
- if (MemTracker::track_callsite()) {
- char buf[1024];
- address pc = ((VMMemRegionEx*)rec)->pc();
- if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
- tty->print_cr("\tfrom %s", buf);
- } else {
- tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
- }
-
- }
-}
-
-#endif
-
-
-bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) {
- VMMemRegionEx new_rec;
- assert(rec->is_allocation_record() || rec->is_commit_record(),
- "Sanity check");
- if (MemTracker::track_callsite()) {
- new_rec.init((MemPointerRecordEx*)rec);
- } else {
- new_rec.init(rec);
- }
- return insert(&new_rec);
-}
-
-bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) {
- VMMemRegionEx new_rec;
- assert(rec->is_allocation_record() || rec->is_commit_record(),
- "Sanity check");
- if (MemTracker::track_callsite()) {
- new_rec.init((MemPointerRecordEx*)rec);
- } else {
- new_rec.init(rec);
- }
- return insert_after(&new_rec);
-}
-
-// we don't consolidate reserved regions, since they may be categorized
-// in different types.
-bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) {
- assert(rec->is_allocation_record(), "Sanity check");
- VMMemRegion* reserved_region = (VMMemRegion*)current();
-
- // we don't have anything yet
- if (reserved_region == NULL) {
- return insert_record(rec);
- }
-
- assert(reserved_region->is_reserved_region(), "Sanity check");
- // duplicated records
- if (reserved_region->is_same_region(rec)) {
- return true;
- }
- // Overlapping stack regions indicate that a JNI thread failed to
- // detach from the VM before exiting. This leaks the JavaThread object.
- if (CheckJNICalls) {
- guarantee(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) != mtThreadStack ||
- !reserved_region->overlaps_region(rec),
- "Attached JNI thread exited without being detached");
- }
- // otherwise, we should not have overlapping reserved regions
- assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
- reserved_region->base() > rec->addr(), "Just check: locate()");
- assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
- !reserved_region->overlaps_region(rec), "overlapping reserved regions");
-
- return insert_record(rec);
-}
-
-// we do consolidate committed regions
-bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) {
- assert(rec->is_commit_record(), "Sanity check");
- VMMemRegion* reserved_rgn = (VMMemRegion*)current();
- assert(reserved_rgn->is_reserved_region() && reserved_rgn->contains_region(rec),
- "Sanity check");
-
- // thread's native stack is always marked as "committed", ignore
- // the "commit" operation for creating stack guard pages
- if (FLAGS_TO_MEMORY_TYPE(reserved_rgn->flags()) == mtThreadStack &&
- FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
- return true;
- }
-
- // if the reserved region has any committed regions
- VMMemRegion* committed_rgn = (VMMemRegion*)next();
- while (committed_rgn != NULL && committed_rgn->is_committed_region()) {
- // duplicated commit records
- if(committed_rgn->contains_region(rec)) {
- return true;
- } else if (committed_rgn->overlaps_region(rec)) {
- // overlaps front part
- if (rec->addr() < committed_rgn->addr()) {
- committed_rgn->expand_region(rec->addr(),
- committed_rgn->addr() - rec->addr());
- } else {
- // overlaps tail part
- address committed_rgn_end = committed_rgn->addr() +
- committed_rgn->size();
- assert(committed_rgn_end < rec->addr() + rec->size(),
- "overlap tail part");
- committed_rgn->expand_region(committed_rgn_end,
- (rec->addr() + rec->size()) - committed_rgn_end);
- }
- } else if (committed_rgn->base() + committed_rgn->size() == rec->addr()) {
- // adjunct each other
- committed_rgn->expand_region(rec->addr(), rec->size());
- VMMemRegion* next_reg = (VMMemRegion*)next();
- // see if we can consolidate next committed region
- if (next_reg != NULL && next_reg->is_committed_region() &&
- next_reg->base() == committed_rgn->base() + committed_rgn->size()) {
- committed_rgn->expand_region(next_reg->base(), next_reg->size());
- // delete merged region
- remove();
- }
- return true;
- } else if (committed_rgn->base() > rec->addr()) {
- // found the location, insert this committed region
- return insert_record(rec);
- }
- committed_rgn = (VMMemRegion*)next();
- }
- return insert_record(rec);
-}
-
-bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) {
- assert(rec->is_uncommit_record(), "sanity check");
- VMMemRegion* cur;
- cur = (VMMemRegion*)current();
- assert(cur->is_reserved_region() && cur->contains_region(rec),
- "Sanity check");
- // thread's native stack is always marked as "committed", ignore
- // the "commit" operation for creating stack guard pages
- if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
- FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
- return true;
- }
-
- cur = (VMMemRegion*)next();
- while (cur != NULL && cur->is_committed_region()) {
- // region already uncommitted, must be due to duplicated record
- if (cur->addr() >= rec->addr() + rec->size()) {
- break;
- } else if (cur->contains_region(rec)) {
- // uncommit whole region
- if (cur->is_same_region(rec)) {
- remove();
- break;
- } else if (rec->addr() == cur->addr() ||
- rec->addr() + rec->size() == cur->addr() + cur->size()) {
- // uncommitted from either end of current memory region.
- cur->exclude_region(rec->addr(), rec->size());
- break;
- } else { // split the committed region and release the middle
- address high_addr = cur->addr() + cur->size();
- size_t sz = high_addr - rec->addr();
- cur->exclude_region(rec->addr(), sz);
- sz = high_addr - (rec->addr() + rec->size());
- if (MemTracker::track_callsite()) {
- MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
- ((VMMemRegionEx*)cur)->pc());
- return insert_record_after(&tmp);
- } else {
- MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
- return insert_record_after(&tmp);
- }
- }
- }
- cur = (VMMemRegion*)next();
- }
-
- // we may not find committed record due to duplicated records
- return true;
-}
-
-bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) {
- assert(rec->is_deallocation_record(), "Sanity check");
- VMMemRegion* cur = (VMMemRegion*)current();
- assert(cur->is_reserved_region() && cur->contains_region(rec),
- "Sanity check");
- if (rec->is_same_region(cur)) {
-
- // In snapshot, the virtual memory records are sorted in following orders:
- // 1. virtual memory's base address
- // 2. virtual memory reservation record, followed by commit records within this reservation.
- // The commit records are also in base address order.
- // When a reserved region is released, we want to remove the reservation record and all
- // commit records following it.
-#ifdef ASSERT
- address low_addr = cur->addr();
- address high_addr = low_addr + cur->size();
-#endif
- // remove virtual memory reservation record
- remove();
- // remove committed regions within above reservation
- VMMemRegion* next_region = (VMMemRegion*)current();
- while (next_region != NULL && next_region->is_committed_region()) {
- assert(next_region->addr() >= low_addr &&
- next_region->addr() + next_region->size() <= high_addr,
- "Range check");
- remove();
- next_region = (VMMemRegion*)current();
- }
- } else if (rec->addr() == cur->addr() ||
- rec->addr() + rec->size() == cur->addr() + cur->size()) {
- // released region is at either end of this region
- cur->exclude_region(rec->addr(), rec->size());
- assert(check_reserved_region(), "Integrity check");
- } else { // split the reserved region and release the middle
- address high_addr = cur->addr() + cur->size();
- size_t sz = high_addr - rec->addr();
- cur->exclude_region(rec->addr(), sz);
- sz = high_addr - rec->addr() - rec->size();
- if (MemTracker::track_callsite()) {
- MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
- ((VMMemRegionEx*)cur)->pc());
- bool ret = insert_reserved_region(&tmp);
- assert(!ret || check_reserved_region(), "Integrity check");
- return ret;
- } else {
- MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
- bool ret = insert_reserved_region(&tmp);
- assert(!ret || check_reserved_region(), "Integrity check");
- return ret;
- }
- }
- return true;
-}
-
-bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
- // skip all 'commit' records associated with previous reserved region
- VMMemRegion* p = (VMMemRegion*)next();
- while (p != NULL && p->is_committed_region() &&
- p->base() + p->size() < rec->addr()) {
- p = (VMMemRegion*)next();
- }
- return insert_record(rec);
-}
-
-bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) {
- assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained");
- address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL);
- if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region
- size_t sz = rgn->size() - new_rgn_size;
- // the original region becomes 'new' region
- rgn->exclude_region(new_rgn_addr + new_rgn_size, sz);
- // remaining becomes next region
- MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc);
- return insert_reserved_region(&next_rgn);
- } else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) {
- rgn->exclude_region(new_rgn_addr, new_rgn_size);
- MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
- return insert_reserved_region(&next_rgn);
- } else {
- // the orginal region will be split into three
- address rgn_high_addr = rgn->base() + rgn->size();
- // first region
- rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr));
- // the second region is the new region
- MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
- if (!insert_reserved_region(&new_rgn)) return false;
- // the remaining region
- MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(),
- rgn_high_addr - (new_rgn_addr + new_rgn_size), pc);
- return insert_reserved_region(&rem_rgn);
- }
-}
-
-static int sort_in_seq_order(const void* p1, const void* p2) {
- assert(p1 != NULL && p2 != NULL, "Sanity check");
- const MemPointerRecord* mp1 = (MemPointerRecord*)p1;
- const MemPointerRecord* mp2 = (MemPointerRecord*)p2;
- return (mp1->seq() - mp2->seq());
-}
-
-bool StagingArea::init() {
- if (MemTracker::track_callsite()) {
- _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
- _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
- } else {
- _malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
- _vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
- }
-
- if (_malloc_data != NULL && _vm_data != NULL &&
- !_malloc_data->out_of_memory() &&
- !_vm_data->out_of_memory()) {
- return true;
- } else {
- if (_malloc_data != NULL) delete _malloc_data;
- if (_vm_data != NULL) delete _vm_data;
- _malloc_data = NULL;
- _vm_data = NULL;
- return false;
- }
-}
-
-
-VMRecordIterator StagingArea::virtual_memory_record_walker() {
- MemPointerArray* arr = vm_data();
- // sort into seq number order
- arr->sort((FN_SORT)sort_in_seq_order);
- return VMRecordIterator(arr);
-}
-
-
-MemSnapshot::MemSnapshot() {
- if (MemTracker::track_callsite()) {
- _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>();
- _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true);
- } else {
- _alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>();
- _vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true);
- }
-
- _staging_area.init();
- _lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock");
- NOT_PRODUCT(_untracked_count = 0;)
- _number_of_classes = 0;
-}
-
-MemSnapshot::~MemSnapshot() {
- assert(MemTracker::shutdown_in_progress(), "native memory tracking still on");
- {
- MutexLockerEx locker(_lock);
- if (_alloc_ptrs != NULL) {
- delete _alloc_ptrs;
- _alloc_ptrs = NULL;
- }
-
- if (_vm_ptrs != NULL) {
- delete _vm_ptrs;
- _vm_ptrs = NULL;
- }
- }
-
- if (_lock != NULL) {
- delete _lock;
- _lock = NULL;
- }
-}
-
-
-void MemSnapshot::copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src) {
- assert(dest != NULL && src != NULL, "Just check");
- assert(dest->addr() == src->addr(), "Just check");
- assert(dest->seq() > 0 && src->seq() > 0, "not sequenced");
-
- if (MemTracker::track_callsite()) {
- *(SeqMemPointerRecordEx*)dest = *(SeqMemPointerRecordEx*)src;
- } else {
- *(SeqMemPointerRecord*)dest = *(SeqMemPointerRecord*)src;
- }
-}
-
-void MemSnapshot::assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src) {
- assert(src != NULL && dest != NULL, "Just check");
- assert(dest->seq() == 0 && src->seq() >0, "cast away sequence");
-
- if (MemTracker::track_callsite()) {
- *(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src;
- } else {
- *(MemPointerRecord*)dest = *(MemPointerRecord*)src;
- }
-}
-
-// merge a recorder to the staging area
-bool MemSnapshot::merge(MemRecorder* rec) {
- assert(rec != NULL && !rec->out_of_memory(), "Just check");
-
- SequencedRecordIterator itr(rec->pointer_itr());
-
- MutexLockerEx lock(_lock, true);
- MemPointerIterator malloc_staging_itr(_staging_area.malloc_data());
- MemPointerRecord* incoming_rec = (MemPointerRecord*) itr.current();
- MemPointerRecord* matched_rec;
-
- while (incoming_rec != NULL) {
- if (incoming_rec->is_vm_pointer()) {
- // we don't do anything with virtual memory records during merge
- if (!_staging_area.vm_data()->append(incoming_rec)) {
- return false;
- }
- } else {
- // locate matched record and/or also position the iterator to proper
- // location for this incoming record.
- matched_rec = (MemPointerRecord*)malloc_staging_itr.locate(incoming_rec->addr());
- // we have not seen this memory block in this generation,
- // so just add to staging area
- if (matched_rec == NULL) {
- if (!malloc_staging_itr.insert(incoming_rec)) {
- return false;
- }
- } else if (incoming_rec->addr() == matched_rec->addr()) {
- // whoever has higher sequence number wins
- if (incoming_rec->seq() > matched_rec->seq()) {
- copy_seq_pointer(matched_rec, incoming_rec);
- }
- } else if (incoming_rec->addr() < matched_rec->addr()) {
- if (!malloc_staging_itr.insert(incoming_rec)) {
- return false;
- }
- } else {
- ShouldNotReachHere();
- }
- }
- incoming_rec = (MemPointerRecord*)itr.next();
- }
- NOT_PRODUCT(void check_staging_data();)
- return true;
-}
-
-
-// promote data to next generation
-bool MemSnapshot::promote(int number_of_classes) {
- assert(_alloc_ptrs != NULL && _vm_ptrs != NULL, "Just check");
- assert(_staging_area.malloc_data() != NULL && _staging_area.vm_data() != NULL,
- "Just check");
- MutexLockerEx lock(_lock, true);
-
- MallocRecordIterator malloc_itr = _staging_area.malloc_record_walker();
- bool promoted = false;
- if (promote_malloc_records(&malloc_itr)) {
- VMRecordIterator vm_itr = _staging_area.virtual_memory_record_walker();
- if (promote_virtual_memory_records(&vm_itr)) {
- promoted = true;
- }
- }
-
- NOT_PRODUCT(check_malloc_pointers();)
- _staging_area.clear();
- _number_of_classes = number_of_classes;
- return promoted;
-}
-
-bool MemSnapshot::promote_malloc_records(MemPointerArrayIterator* itr) {
- MemPointerIterator malloc_snapshot_itr(_alloc_ptrs);
- MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
- MemPointerRecord* matched_rec;
- while (new_rec != NULL) {
- matched_rec = (MemPointerRecord*)malloc_snapshot_itr.locate(new_rec->addr());
- // found matched memory block
- if (matched_rec != NULL && new_rec->addr() == matched_rec->addr()) {
- // snapshot already contains 'live' records
- assert(matched_rec->is_allocation_record() || matched_rec->is_arena_memory_record(),
- "Sanity check");
- // update block states
- if (new_rec->is_allocation_record()) {
- assign_pointer(matched_rec, new_rec);
- } else if (new_rec->is_arena_memory_record()) {
- if (new_rec->size() == 0) {
- // remove size record once size drops to 0
- malloc_snapshot_itr.remove();
- } else {
- assign_pointer(matched_rec, new_rec);
- }
- } else {
- // a deallocation record
- assert(new_rec->is_deallocation_record(), "Sanity check");
- // an arena record can be followed by a size record, we need to remove both
- if (matched_rec->is_arena_record()) {
- MemPointerRecord* next = (MemPointerRecord*)malloc_snapshot_itr.peek_next();
- if (next != NULL && next->is_arena_memory_record() &&
- next->is_memory_record_of_arena(matched_rec)) {
- malloc_snapshot_itr.remove();
- }
- }
- // the memory is deallocated, remove related record(s)
- malloc_snapshot_itr.remove();
- }
- } else {
- // don't insert size 0 record
- if (new_rec->is_arena_memory_record() && new_rec->size() == 0) {
- new_rec = NULL;
- }
-
- if (new_rec != NULL) {
- if (new_rec->is_allocation_record() || new_rec->is_arena_memory_record()) {
- if (matched_rec != NULL && new_rec->addr() > matched_rec->addr()) {
- if (!malloc_snapshot_itr.insert_after(new_rec)) {
- return false;
- }
- } else {
- if (!malloc_snapshot_itr.insert(new_rec)) {
- return false;
- }
- }
- }
-#ifndef PRODUCT
- else if (!has_allocation_record(new_rec->addr())) {
- // NMT can not track some startup memory, which is allocated before NMT is on
- _untracked_count ++;
- }
-#endif
- }
- }
- new_rec = (MemPointerRecord*)itr->next();
- }
- return true;
-}
-
-bool MemSnapshot::promote_virtual_memory_records(MemPointerArrayIterator* itr) {
- VMMemPointerIterator vm_snapshot_itr(_vm_ptrs);
- MemPointerRecord* new_rec = (MemPointerRecord*)itr->current();
- VMMemRegion* reserved_rec;
- while (new_rec != NULL) {
- assert(new_rec->is_vm_pointer(), "Sanity check");
-
- // locate a reserved region that contains the specified address, or
- // the nearest reserved region has base address just above the specified
- // address
- reserved_rec = (VMMemRegion*)vm_snapshot_itr.locate(new_rec->addr());
- if (reserved_rec != NULL && reserved_rec->contains_region(new_rec)) {
- // snapshot can only have 'live' records
- assert(reserved_rec->is_reserved_region(), "Sanity check");
- if (new_rec->is_allocation_record()) {
- if (!reserved_rec->is_same_region(new_rec)) {
- // only deal with split a bigger reserved region into smaller regions.
- // So far, CDS is the only use case.
- if (!vm_snapshot_itr.split_reserved_region(reserved_rec, new_rec->addr(), new_rec->size())) {
- return false;
- }
- }
- } else if (new_rec->is_uncommit_record()) {
- if (!vm_snapshot_itr.remove_uncommitted_region(new_rec)) {
- return false;
- }
- } else if (new_rec->is_commit_record()) {
- // insert or expand existing committed region to cover this
- // newly committed region
- if (!vm_snapshot_itr.add_committed_region(new_rec)) {
- return false;
- }
- } else if (new_rec->is_deallocation_record()) {
- // release part or all memory region
- if (!vm_snapshot_itr.remove_released_region(new_rec)) {
- return false;
- }
- } else if (new_rec->is_type_tagging_record()) {
- // tag this reserved virtual memory range to a memory type. Can not re-tag a memory range
- // to different type.
- assert(FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == mtNone ||
- FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) == FLAGS_TO_MEMORY_TYPE(new_rec->flags()),
- "Sanity check");
- reserved_rec->tag(new_rec->flags());
- } else {
- ShouldNotReachHere();
- }
- } else {
- /*
- * The assertion failure indicates mis-matched virtual memory records. The likely
- * scenario is, that some virtual memory operations are not going through os::xxxx_memory()
- * api, which have to be tracked manually. (perfMemory is an example).
- */
- assert(new_rec->is_allocation_record(), "Sanity check");
- if (!vm_snapshot_itr.add_reserved_region(new_rec)) {
- return false;
- }
- }
- new_rec = (MemPointerRecord*)itr->next();
- }
- return true;
-}
-
-#ifndef PRODUCT
-void MemSnapshot::print_snapshot_stats(outputStream* st) {
- st->print_cr("Snapshot:");
- st->print_cr("\tMalloced: %d/%d [%5.2f%%] %dKB", _alloc_ptrs->length(), _alloc_ptrs->capacity(),
- (100.0 * (float)_alloc_ptrs->length()) / (float)_alloc_ptrs->capacity(), _alloc_ptrs->instance_size()/K);
-
- st->print_cr("\tVM: %d/%d [%5.2f%%] %dKB", _vm_ptrs->length(), _vm_ptrs->capacity(),
- (100.0 * (float)_vm_ptrs->length()) / (float)_vm_ptrs->capacity(), _vm_ptrs->instance_size()/K);
-
- st->print_cr("\tMalloc staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.malloc_data()->length(),
- _staging_area.malloc_data()->capacity(),
- (100.0 * (float)_staging_area.malloc_data()->length()) / (float)_staging_area.malloc_data()->capacity(),
- _staging_area.malloc_data()->instance_size()/K);
-
- st->print_cr("\tVirtual memory staging Area: %d/%d [%5.2f%%] %dKB", _staging_area.vm_data()->length(),
- _staging_area.vm_data()->capacity(),
- (100.0 * (float)_staging_area.vm_data()->length()) / (float)_staging_area.vm_data()->capacity(),
- _staging_area.vm_data()->instance_size()/K);
-
- st->print_cr("\tUntracked allocation: %d", _untracked_count);
-}
-
-void MemSnapshot::check_malloc_pointers() {
- MemPointerArrayIteratorImpl mItr(_alloc_ptrs);
- MemPointerRecord* p = (MemPointerRecord*)mItr.current();
- MemPointerRecord* prev = NULL;
- while (p != NULL) {
- if (prev != NULL) {
- assert(p->addr() >= prev->addr(), "sorting order");
- }
- prev = p;
- p = (MemPointerRecord*)mItr.next();
- }
-}
-
-bool MemSnapshot::has_allocation_record(address addr) {
- MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
- MemPointerRecord* cur = (MemPointerRecord*)itr.current();
- while (cur != NULL) {
- if (cur->addr() == addr && cur->is_allocation_record()) {
- return true;
- }
- cur = (MemPointerRecord*)itr.next();
- }
- return false;
-}
-#endif // PRODUCT
-
-#ifdef ASSERT
-void MemSnapshot::check_staging_data() {
- MemPointerArrayIteratorImpl itr(_staging_area.malloc_data());
- MemPointerRecord* cur = (MemPointerRecord*)itr.current();
- MemPointerRecord* next = (MemPointerRecord*)itr.next();
- while (next != NULL) {
- assert((next->addr() > cur->addr()) ||
- ((next->flags() & MemPointerRecord::tag_masks) >
- (cur->flags() & MemPointerRecord::tag_masks)),
- "sorting order");
- cur = next;
- next = (MemPointerRecord*)itr.next();
- }
-
- MemPointerArrayIteratorImpl vm_itr(_staging_area.vm_data());
- cur = (MemPointerRecord*)vm_itr.current();
- while (cur != NULL) {
- assert(cur->is_vm_pointer(), "virtual memory pointer only");
- cur = (MemPointerRecord*)vm_itr.next();
- }
-}
-
-void MemSnapshot::dump_all_vm_pointers() {
- MemPointerArrayIteratorImpl itr(_vm_ptrs);
- VMMemRegion* ptr = (VMMemRegion*)itr.current();
- tty->print_cr("dump virtual memory pointers:");
- while (ptr != NULL) {
- if (ptr->is_committed_region()) {
- tty->print("\t");
- }
- tty->print("[" PTR_FORMAT " - " PTR_FORMAT "] [%x]", ptr->addr(),
- (ptr->addr() + ptr->size()), ptr->flags());
-
- if (MemTracker::track_callsite()) {
- VMMemRegionEx* ex = (VMMemRegionEx*)ptr;
- if (ex->pc() != NULL) {
- char buf[1024];
- if (os::dll_address_to_function_name(ex->pc(), buf, sizeof(buf), NULL)) {
- tty->print_cr("\t%s", buf);
- } else {
- tty->cr();
- }
- }
- }
-
- ptr = (VMMemRegion*)itr.next();
- }
- tty->flush();
-}
-#endif // ASSERT
-