--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/services/mallocTracker.cpp Thu Aug 07 12:18:58 2014 -0700
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 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/atomic.hpp"
+#include "runtime/atomic.inline.hpp"
+#include "services/mallocSiteTable.hpp"
+#include "services/mallocTracker.hpp"
+#include "services/mallocTracker.inline.hpp"
+#include "services/memTracker.hpp"
+
+size_t MallocMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)];
+
+// Total malloc'd memory amount
+size_t MallocMemorySnapshot::total() const {
+ size_t amount = 0;
+ for (int index = 0; index < mt_number_of_types; index ++) {
+ amount += _malloc[index].malloc_size();
+ }
+ amount += _tracking_header.size() + total_arena();
+ return amount;
+}
+
+// Total malloc'd memory used by arenas
+size_t MallocMemorySnapshot::total_arena() const {
+ size_t amount = 0;
+ for (int index = 0; index < mt_number_of_types; index ++) {
+ amount += _malloc[index].arena_size();
+ }
+ return amount;
+}
+
+
+void MallocMemorySnapshot::reset() {
+ _tracking_header.reset();
+ for (int index = 0; index < mt_number_of_types; index ++) {
+ _malloc[index].reset();
+ }
+}
+
+// Make adjustment by subtracting chunks used by arenas
+// from total chunks to get total free chunck size
+void MallocMemorySnapshot::make_adjustment() {
+ size_t arena_size = total_arena();
+ int chunk_idx = NMTUtil::flag_to_index(mtChunk);
+ _malloc[chunk_idx].record_free(arena_size);
+}
+
+
+void MallocMemorySummary::initialize() {
+ assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check");
+ // Uses placement new operator to initialize static area.
+ ::new ((void*)_snapshot)MallocMemorySnapshot();
+}
+
+void MallocHeader::release() const {
+ // Tracking already shutdown, no housekeeping is needed anymore
+ if (MemTracker::tracking_level() <= NMT_minimal) return;
+
+ MallocMemorySummary::record_free(size(), flags());
+ MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader));
+ if (tracking_level() == NMT_detail) {
+ MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx);
+ }
+}
+
+bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size,
+ size_t* bucket_idx, size_t* pos_idx) const {
+ bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx);
+
+ // Something went wrong, could be OOM or overflow malloc site table.
+ // We want to keep tracking data under OOM circumstance, so transition to
+ // summary tracking.
+ if (!ret) {
+ MemTracker::transition_to(NMT_summary);
+ }
+ return ret;
+}
+
+bool MallocHeader::get_stack(NativeCallStack& stack) const {
+ return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx);
+}
+
+bool MallocTracker::initialize(NMT_TrackingLevel level) {
+ if (level >= NMT_summary) {
+ MallocMemorySummary::initialize();
+ }
+
+ if (level == NMT_detail) {
+ return MallocSiteTable::initialize();
+ }
+ return true;
+}
+
+bool MallocTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) {
+ assert(from != NMT_off, "Can not transition from off state");
+ assert(to != NMT_off, "Can not transition to off state");
+ if (from == NMT_minimal) {
+ MallocMemorySummary::reset();
+ }
+
+ if (to == NMT_detail) {
+ assert(from == NMT_minimal || from == NMT_summary, "Just check");
+ return MallocSiteTable::initialize();
+ } else if (from == NMT_detail) {
+ assert(to == NMT_minimal || to == NMT_summary, "Just check");
+ MallocSiteTable::shutdown();
+ }
+ return true;
+}
+
+// Record a malloc memory allocation
+void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags,
+ const NativeCallStack& stack, NMT_TrackingLevel level) {
+ void* memblock; // the address for user data
+ MallocHeader* header = NULL;
+
+ if (malloc_base == NULL) {
+ return NULL;
+ }
+
+ // Check malloc size, size has to <= MAX_MALLOC_SIZE. This is only possible on 32-bit
+ // systems, when malloc size >= 1GB, but is is safe to assume it won't happen.
+ if (size > MAX_MALLOC_SIZE) {
+ fatal("Should not use malloc for big memory block, use virtual memory instead");
+ }
+ // Uses placement global new operator to initialize malloc header
+ switch(level) {
+ case NMT_off:
+ return malloc_base;
+ case NMT_minimal: {
+ MallocHeader* hdr = ::new (malloc_base) MallocHeader();
+ break;
+ }
+ case NMT_summary: {
+ header = ::new (malloc_base) MallocHeader(size, flags);
+ break;
+ }
+ case NMT_detail: {
+ header = ::new (malloc_base) MallocHeader(size, flags, stack);
+ break;
+ }
+ default:
+ ShouldNotReachHere();
+ }
+ memblock = (void*)((char*)malloc_base + sizeof(MallocHeader));
+
+ // The alignment check: 8 bytes alignment for 32 bit systems.
+ // 16 bytes alignment for 64-bit systems.
+ assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check");
+
+ // Sanity check
+ assert(get_memory_tracking_level(memblock) == level,
+ "Wrong tracking level");
+
+#ifdef ASSERT
+ if (level > NMT_minimal) {
+ // Read back
+ assert(get_size(memblock) == size, "Wrong size");
+ assert(get_flags(memblock) == flags, "Wrong flags");
+ }
+#endif
+
+ return memblock;
+}
+
+void* MallocTracker::record_free(void* memblock) {
+ // Never turned on
+ if (MemTracker::tracking_level() == NMT_off ||
+ memblock == NULL) {
+ return memblock;
+ }
+ MallocHeader* header = malloc_header(memblock);
+ header->release();
+
+ return (void*)header;
+}
+
+