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/*
* Copyright (c) 2012, 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/atomic.hpp"
#include "services/memBaseline.hpp"
#include "services/memRecorder.hpp"
#include "services/memPtr.hpp"
#include "services/memTracker.hpp"
MemPointer* SequencedRecordIterator::next_record() {
MemPointer* itr_cur = _itr.current();
if (itr_cur == NULL) return NULL;
MemPointer* itr_next = _itr.next();
while (itr_next != NULL &&
same_kind((MemPointerRecord*)itr_cur, (MemPointerRecord*)itr_next)) {
itr_cur = itr_next;
itr_next = _itr.next();
}
return itr_cur;
}
debug_only(volatile jint MemRecorder::_instance_count = 0;)
MemRecorder::MemRecorder() {
assert(MemTracker::is_on(), "Native memory tracking is off");
debug_only(Atomic::inc(&_instance_count);)
debug_only(set_generation();)
if (MemTracker::track_callsite()) {
_pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx,
DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
} else {
_pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord,
DEFAULT_RECORDER_PTR_ARRAY_SIZE>();
}
_next = NULL;
if (_pointer_records != NULL) {
// recode itself
record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
sizeof(MemRecorder), CALLER_PC);
record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder),
_pointer_records->instance_size(),CURRENT_PC);
}
}
MemRecorder::~MemRecorder() {
if (_pointer_records != NULL) {
if (MemTracker::is_on()) {
MemTracker::record_free((address)_pointer_records, mtNMT);
MemTracker::record_free((address)this, mtNMT);
}
delete _pointer_records;
}
if (_next != NULL) {
delete _next;
}
#ifdef ASSERT
Atomic::dec(&_instance_count);
#endif
}
// Sorting order:
// 1. memory block address
// 2. mem pointer record tags
// 3. sequence number
int MemRecorder::sort_record_fn(const void* e1, const void* e2) {
const MemPointerRecord* p1 = (const MemPointerRecord*)e1;
const MemPointerRecord* p2 = (const MemPointerRecord*)e2;
int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr());
if (delta == 0) {
int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks),
(p2->flags() & MemPointerRecord::tag_masks));
if (df == 0) {
assert(p1->seq() != p2->seq(), "dup seq");
return p1->seq() - p2->seq();
} else {
return df;
}
} else {
return delta;
}
}
bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, address pc) {
#ifdef ASSERT
if (MemPointerRecord::is_virtual_memory_record(flags)) {
assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record");
} else {
assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() ||
(flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() ||
IS_ARENA_OBJ(flags),
"bad malloc record");
}
// a recorder should only hold records within the same generation
unsigned long cur_generation = SequenceGenerator::current_generation();
assert(cur_generation == _generation,
"this thread did not enter sync point");
#endif
if (MemTracker::track_callsite()) {
SeqMemPointerRecordEx ap(p, flags, size, pc);
debug_only(check_dup_seq(ap.seq());)
return _pointer_records->append(&ap);
} else {
SeqMemPointerRecord ap(p, flags, size);
debug_only(check_dup_seq(ap.seq());)
return _pointer_records->append(&ap);
}
}
// iterator for alloc pointers
SequencedRecordIterator MemRecorder::pointer_itr() {
assert(_pointer_records != NULL, "just check");
_pointer_records->sort((FN_SORT)sort_record_fn);
return SequencedRecordIterator(_pointer_records);
}
#ifdef ASSERT
void MemRecorder::set_generation() {
_generation = SequenceGenerator::current_generation();
}
void MemRecorder::check_dup_seq(jint seq) const {
MemPointerArrayIteratorImpl itr(_pointer_records);
MemPointerRecord* rc = (MemPointerRecord*)itr.current();
while (rc != NULL) {
assert(rc->seq() != seq, "dup seq");
rc = (MemPointerRecord*)itr.next();
}
}
#endif
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