732 lines
26 KiB
C++
732 lines
26 KiB
C++
/*
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* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "runtime/mutexLocker.hpp"
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#include "utilities/decoder.hpp"
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#include "services/memBaseline.hpp"
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#include "services/memPtr.hpp"
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#include "services/memPtrArray.hpp"
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#include "services/memSnapshot.hpp"
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#include "services/memTracker.hpp"
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#ifdef ASSERT
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void decode_pointer_record(MemPointerRecord* rec) {
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tty->print("Pointer: [" PTR_FORMAT " - " PTR_FORMAT "] size = %d bytes", rec->addr(),
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rec->addr() + rec->size(), (int)rec->size());
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tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
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if (rec->is_vm_pointer()) {
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if (rec->is_allocation_record()) {
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tty->print_cr(" (reserve)");
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} else if (rec->is_commit_record()) {
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tty->print_cr(" (commit)");
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} else if (rec->is_uncommit_record()) {
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tty->print_cr(" (uncommit)");
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} else if (rec->is_deallocation_record()) {
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tty->print_cr(" (release)");
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} else {
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tty->print_cr(" (tag)");
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}
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} else {
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if (rec->is_arena_memory_record()) {
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tty->print_cr(" (arena size)");
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} else if (rec->is_allocation_record()) {
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tty->print_cr(" (malloc)");
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} else {
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tty->print_cr(" (free)");
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}
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}
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if (MemTracker::track_callsite()) {
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char buf[1024];
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address pc = ((MemPointerRecordEx*)rec)->pc();
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if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
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tty->print_cr("\tfrom %s", buf);
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} else {
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tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
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}
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}
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}
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void decode_vm_region_record(VMMemRegion* rec) {
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tty->print("VM Region [" PTR_FORMAT " - " PTR_FORMAT "]", rec->addr(),
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rec->addr() + rec->size());
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tty->print(" type = %s", MemBaseline::type2name(FLAGS_TO_MEMORY_TYPE(rec->flags())));
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if (rec->is_allocation_record()) {
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tty->print_cr(" (reserved)");
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} else if (rec->is_commit_record()) {
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tty->print_cr(" (committed)");
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} else {
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ShouldNotReachHere();
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}
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if (MemTracker::track_callsite()) {
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char buf[1024];
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address pc = ((VMMemRegionEx*)rec)->pc();
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if (pc != NULL && os::dll_address_to_function_name(pc, buf, sizeof(buf), NULL)) {
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tty->print_cr("\tfrom %s", buf);
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} else {
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tty->print_cr("\tcould not decode pc = " PTR_FORMAT "", pc);
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}
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}
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}
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#endif
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bool VMMemPointerIterator::insert_record(MemPointerRecord* rec) {
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VMMemRegionEx new_rec;
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assert(rec->is_allocation_record() || rec->is_commit_record(),
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"Sanity check");
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if (MemTracker::track_callsite()) {
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new_rec.init((MemPointerRecordEx*)rec);
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} else {
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new_rec.init(rec);
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}
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return insert(&new_rec);
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}
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bool VMMemPointerIterator::insert_record_after(MemPointerRecord* rec) {
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VMMemRegionEx new_rec;
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assert(rec->is_allocation_record() || rec->is_commit_record(),
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"Sanity check");
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if (MemTracker::track_callsite()) {
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new_rec.init((MemPointerRecordEx*)rec);
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} else {
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new_rec.init(rec);
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}
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return insert_after(&new_rec);
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}
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// we don't consolidate reserved regions, since they may be categorized
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// in different types.
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bool VMMemPointerIterator::add_reserved_region(MemPointerRecord* rec) {
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assert(rec->is_allocation_record(), "Sanity check");
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VMMemRegion* reserved_region = (VMMemRegion*)current();
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// we don't have anything yet
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if (reserved_region == NULL) {
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return insert_record(rec);
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}
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assert(reserved_region->is_reserved_region(), "Sanity check");
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// duplicated records
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if (reserved_region->is_same_region(rec)) {
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return true;
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}
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// Overlapping stack regions indicate that a JNI thread failed to
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// detach from the VM before exiting. This leaks the JavaThread object.
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if (CheckJNICalls) {
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guarantee(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) != mtThreadStack ||
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!reserved_region->overlaps_region(rec),
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"Attached JNI thread exited without being detached");
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}
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// otherwise, we should not have overlapping reserved regions
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assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
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reserved_region->base() > rec->addr(), "Just check: locate()");
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assert(FLAGS_TO_MEMORY_TYPE(reserved_region->flags()) == mtThreadStack ||
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!reserved_region->overlaps_region(rec), "overlapping reserved regions");
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return insert_record(rec);
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}
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// we do consolidate committed regions
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bool VMMemPointerIterator::add_committed_region(MemPointerRecord* rec) {
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assert(rec->is_commit_record(), "Sanity check");
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VMMemRegion* reserved_rgn = (VMMemRegion*)current();
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assert(reserved_rgn->is_reserved_region() && reserved_rgn->contains_region(rec),
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"Sanity check");
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// thread's native stack is always marked as "committed", ignore
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// the "commit" operation for creating stack guard pages
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if (FLAGS_TO_MEMORY_TYPE(reserved_rgn->flags()) == mtThreadStack &&
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FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
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return true;
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}
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// if the reserved region has any committed regions
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VMMemRegion* committed_rgn = (VMMemRegion*)next();
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while (committed_rgn != NULL && committed_rgn->is_committed_region()) {
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// duplicated commit records
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if(committed_rgn->contains_region(rec)) {
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return true;
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} else if (committed_rgn->overlaps_region(rec)) {
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// overlaps front part
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if (rec->addr() < committed_rgn->addr()) {
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committed_rgn->expand_region(rec->addr(),
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committed_rgn->addr() - rec->addr());
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} else {
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// overlaps tail part
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address committed_rgn_end = committed_rgn->addr() +
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committed_rgn->size();
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assert(committed_rgn_end < rec->addr() + rec->size(),
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"overlap tail part");
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committed_rgn->expand_region(committed_rgn_end,
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(rec->addr() + rec->size()) - committed_rgn_end);
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}
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} else if (committed_rgn->base() + committed_rgn->size() == rec->addr()) {
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// adjunct each other
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committed_rgn->expand_region(rec->addr(), rec->size());
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VMMemRegion* next_reg = (VMMemRegion*)next();
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// see if we can consolidate next committed region
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if (next_reg != NULL && next_reg->is_committed_region() &&
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next_reg->base() == committed_rgn->base() + committed_rgn->size()) {
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committed_rgn->expand_region(next_reg->base(), next_reg->size());
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// delete merged region
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remove();
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}
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return true;
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} else if (committed_rgn->base() > rec->addr()) {
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// found the location, insert this committed region
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return insert_record(rec);
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}
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committed_rgn = (VMMemRegion*)next();
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}
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return insert_record(rec);
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}
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bool VMMemPointerIterator::remove_uncommitted_region(MemPointerRecord* rec) {
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assert(rec->is_uncommit_record(), "sanity check");
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VMMemRegion* cur;
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cur = (VMMemRegion*)current();
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assert(cur->is_reserved_region() && cur->contains_region(rec),
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"Sanity check");
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// thread's native stack is always marked as "committed", ignore
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// the "commit" operation for creating stack guard pages
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if (FLAGS_TO_MEMORY_TYPE(cur->flags()) == mtThreadStack &&
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FLAGS_TO_MEMORY_TYPE(rec->flags()) != mtThreadStack) {
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return true;
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}
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cur = (VMMemRegion*)next();
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while (cur != NULL && cur->is_committed_region()) {
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// region already uncommitted, must be due to duplicated record
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if (cur->addr() >= rec->addr() + rec->size()) {
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break;
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} else if (cur->contains_region(rec)) {
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// uncommit whole region
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if (cur->is_same_region(rec)) {
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remove();
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break;
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} else if (rec->addr() == cur->addr() ||
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rec->addr() + rec->size() == cur->addr() + cur->size()) {
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// uncommitted from either end of current memory region.
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cur->exclude_region(rec->addr(), rec->size());
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break;
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} else { // split the committed region and release the middle
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address high_addr = cur->addr() + cur->size();
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size_t sz = high_addr - rec->addr();
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cur->exclude_region(rec->addr(), sz);
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sz = high_addr - (rec->addr() + rec->size());
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if (MemTracker::track_callsite()) {
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MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
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((VMMemRegionEx*)cur)->pc());
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return insert_record_after(&tmp);
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} else {
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MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
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return insert_record_after(&tmp);
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}
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}
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}
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cur = (VMMemRegion*)next();
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}
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// we may not find committed record due to duplicated records
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return true;
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}
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bool VMMemPointerIterator::remove_released_region(MemPointerRecord* rec) {
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assert(rec->is_deallocation_record(), "Sanity check");
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VMMemRegion* cur = (VMMemRegion*)current();
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assert(cur->is_reserved_region() && cur->contains_region(rec),
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"Sanity check");
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if (rec->is_same_region(cur)) {
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// release whole reserved region
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#ifdef ASSERT
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VMMemRegion* next_region = (VMMemRegion*)peek_next();
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// should not have any committed memory in this reserved region
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assert(next_region == NULL || !next_region->is_committed_region(), "Sanity check");
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#endif
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remove();
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} else if (rec->addr() == cur->addr() ||
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rec->addr() + rec->size() == cur->addr() + cur->size()) {
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// released region is at either end of this region
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cur->exclude_region(rec->addr(), rec->size());
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assert(check_reserved_region(), "Integrity check");
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} else { // split the reserved region and release the middle
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address high_addr = cur->addr() + cur->size();
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size_t sz = high_addr - rec->addr();
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cur->exclude_region(rec->addr(), sz);
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sz = high_addr - rec->addr() - rec->size();
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if (MemTracker::track_callsite()) {
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MemPointerRecordEx tmp(rec->addr() + rec->size(), cur->flags(), sz,
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((VMMemRegionEx*)cur)->pc());
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bool ret = insert_reserved_region(&tmp);
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assert(!ret || check_reserved_region(), "Integrity check");
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return ret;
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} else {
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MemPointerRecord tmp(rec->addr() + rec->size(), cur->flags(), sz);
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bool ret = insert_reserved_region(&tmp);
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assert(!ret || check_reserved_region(), "Integrity check");
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return ret;
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}
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}
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return true;
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}
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bool VMMemPointerIterator::insert_reserved_region(MemPointerRecord* rec) {
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// skip all 'commit' records associated with previous reserved region
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VMMemRegion* p = (VMMemRegion*)next();
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while (p != NULL && p->is_committed_region() &&
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p->base() + p->size() < rec->addr()) {
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p = (VMMemRegion*)next();
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}
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return insert_record(rec);
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}
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bool VMMemPointerIterator::split_reserved_region(VMMemRegion* rgn, address new_rgn_addr, size_t new_rgn_size) {
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assert(rgn->contains_region(new_rgn_addr, new_rgn_size), "Not fully contained");
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address pc = (MemTracker::track_callsite() ? ((VMMemRegionEx*)rgn)->pc() : NULL);
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if (rgn->base() == new_rgn_addr) { // new region is at the beginning of the region
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size_t sz = rgn->size() - new_rgn_size;
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// the original region becomes 'new' region
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rgn->exclude_region(new_rgn_addr + new_rgn_size, sz);
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// remaining becomes next region
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MemPointerRecordEx next_rgn(new_rgn_addr + new_rgn_size, rgn->flags(), sz, pc);
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return insert_reserved_region(&next_rgn);
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} else if (rgn->base() + rgn->size() == new_rgn_addr + new_rgn_size) {
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rgn->exclude_region(new_rgn_addr, new_rgn_size);
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MemPointerRecordEx next_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
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return insert_reserved_region(&next_rgn);
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} else {
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// the orginal region will be split into three
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address rgn_high_addr = rgn->base() + rgn->size();
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// first region
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rgn->exclude_region(new_rgn_addr, (rgn_high_addr - new_rgn_addr));
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// the second region is the new region
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MemPointerRecordEx new_rgn(new_rgn_addr, rgn->flags(), new_rgn_size, pc);
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if (!insert_reserved_region(&new_rgn)) return false;
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// the remaining region
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MemPointerRecordEx rem_rgn(new_rgn_addr + new_rgn_size, rgn->flags(),
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rgn_high_addr - (new_rgn_addr + new_rgn_size), pc);
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return insert_reserved_region(&rem_rgn);
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}
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}
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static int sort_in_seq_order(const void* p1, const void* p2) {
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assert(p1 != NULL && p2 != NULL, "Sanity check");
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const MemPointerRecord* mp1 = (MemPointerRecord*)p1;
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const MemPointerRecord* mp2 = (MemPointerRecord*)p2;
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return (mp1->seq() - mp2->seq());
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}
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bool StagingArea::init() {
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if (MemTracker::track_callsite()) {
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_malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
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_vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecordEx>();
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} else {
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_malloc_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
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_vm_data = new (std::nothrow)MemPointerArrayImpl<SeqMemPointerRecord>();
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}
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if (_malloc_data != NULL && _vm_data != NULL &&
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!_malloc_data->out_of_memory() &&
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!_vm_data->out_of_memory()) {
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return true;
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} else {
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if (_malloc_data != NULL) delete _malloc_data;
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if (_vm_data != NULL) delete _vm_data;
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_malloc_data = NULL;
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_vm_data = NULL;
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return false;
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}
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}
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VMRecordIterator StagingArea::virtual_memory_record_walker() {
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MemPointerArray* arr = vm_data();
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// sort into seq number order
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arr->sort((FN_SORT)sort_in_seq_order);
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return VMRecordIterator(arr);
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}
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MemSnapshot::MemSnapshot() {
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if (MemTracker::track_callsite()) {
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_alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecordEx>();
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_vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegionEx>(64, true);
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} else {
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_alloc_ptrs = new (std::nothrow) MemPointerArrayImpl<MemPointerRecord>();
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_vm_ptrs = new (std::nothrow)MemPointerArrayImpl<VMMemRegion>(64, true);
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}
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_staging_area.init();
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_lock = new (std::nothrow) Mutex(Monitor::max_nonleaf - 1, "memSnapshotLock");
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NOT_PRODUCT(_untracked_count = 0;)
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_number_of_classes = 0;
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}
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MemSnapshot::~MemSnapshot() {
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assert(MemTracker::shutdown_in_progress(), "native memory tracking still on");
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{
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MutexLockerEx locker(_lock);
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if (_alloc_ptrs != NULL) {
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delete _alloc_ptrs;
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_alloc_ptrs = NULL;
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}
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if (_vm_ptrs != NULL) {
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delete _vm_ptrs;
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_vm_ptrs = NULL;
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}
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}
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if (_lock != NULL) {
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delete _lock;
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_lock = NULL;
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}
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}
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void MemSnapshot::copy_seq_pointer(MemPointerRecord* dest, const MemPointerRecord* src) {
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assert(dest != NULL && src != NULL, "Just check");
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assert(dest->addr() == src->addr(), "Just check");
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assert(dest->seq() > 0 && src->seq() > 0, "not sequenced");
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if (MemTracker::track_callsite()) {
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*(SeqMemPointerRecordEx*)dest = *(SeqMemPointerRecordEx*)src;
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} else {
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*(SeqMemPointerRecord*)dest = *(SeqMemPointerRecord*)src;
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}
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}
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void MemSnapshot::assign_pointer(MemPointerRecord*dest, const MemPointerRecord* src) {
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assert(src != NULL && dest != NULL, "Just check");
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assert(dest->seq() == 0 && src->seq() >0, "cast away sequence");
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if (MemTracker::track_callsite()) {
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*(MemPointerRecordEx*)dest = *(MemPointerRecordEx*)src;
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} else {
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*(MemPointerRecord*)dest = *(MemPointerRecord*)src;
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}
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}
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// merge a recorder to the staging area
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bool MemSnapshot::merge(MemRecorder* rec) {
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assert(rec != NULL && !rec->out_of_memory(), "Just check");
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SequencedRecordIterator itr(rec->pointer_itr());
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MutexLockerEx lock(_lock, true);
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MemPointerIterator malloc_staging_itr(_staging_area.malloc_data());
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MemPointerRecord* incoming_rec = (MemPointerRecord*) itr.current();
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MemPointerRecord* matched_rec;
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while (incoming_rec != NULL) {
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if (incoming_rec->is_vm_pointer()) {
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// we don't do anything with virtual memory records during merge
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if (!_staging_area.vm_data()->append(incoming_rec)) {
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return false;
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}
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} else {
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// locate matched record and/or also position the iterator to proper
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// location for this incoming record.
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|
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->print_cr("");
|
|
}
|
|
}
|
|
}
|
|
|
|
ptr = (VMMemRegion*)itr.next();
|
|
}
|
|
tty->flush();
|
|
}
|
|
#endif // ASSERT
|
|
|