jdk8-mips64-public/hotspot: src/share/vm/services/memBaseline.cpp@69ad7823b1ca (annotated)

src/share/vm/services/memBaseline.cpp@69ad7823b1ca (annotated)

src/share/vm/services/memBaseline.cpp

Mon, 05 Nov 2012 15:30:22 -0500

author: zgu
date: Mon, 05 Nov 2012 15:30:22 -0500
changeset 4248: 69ad7823b1ca
parent 4193: 716c64bda5ba
child 4274: fb3190e77d3c
permissions: -rw-r--r--

8001591: NMT: assertion failed: assert(rec->addr() + rec->size() <= cur->base()) failed: Can not overlap in memSnapshot.cpp
Summary: NMT should allow overlapping committed regions as long as they belong to the same reserved region
Reviewed-by: dholmes, coleenp

 /*
  * 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 "classfile/systemDictionary.hpp"
 #include "memory/allocation.hpp"
 #include "services/memBaseline.hpp"
 #include "services/memTracker.hpp"
 MemType2Name MemBaseline::MemType2NameMap[NUMBER_OF_MEMORY_TYPE] = {
   {mtJavaHeap,   "Java Heap"},
   {mtClass,      "Class"},
   {mtThreadStack,"Thread Stack"},
   {mtThread,     "Thread"},
   {mtCode,       "Code"},
   {mtGC,         "GC"},
   {mtCompiler,   "Compiler"},
   {mtInternal,   "Internal"},
   {mtOther,      "Other"},
   {mtSymbol,     "Symbol"},
   {mtNMT,        "Memory Tracking"},
   {mtChunk,      "Pooled Free Chunks"},
   {mtClassShared,"Shared spaces for classes"},
   {mtNone,       "Unknown"}  // It can happen when type tagging records are lagging
                              // behind
 };
 MemBaseline::MemBaseline() {
   _baselined = false;
   for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) {
     _malloc_data[index].set_type(MemType2NameMap[index]._flag);
     _vm_data[index].set_type(MemType2NameMap[index]._flag);
     _arena_data[index].set_type(MemType2NameMap[index]._flag);
   }
   _malloc_cs = NULL;
   _vm_cs = NULL;
   _vm_map = NULL;
   _number_of_classes = 0;
   _number_of_threads = 0;
 }
 void MemBaseline::clear() {
   if (_malloc_cs != NULL) {
     delete _malloc_cs;
     _malloc_cs = NULL;
   }
   if (_vm_cs != NULL) {
     delete _vm_cs;
     _vm_cs = NULL;
   }
   if (_vm_map != NULL) {
     delete _vm_map;
     _vm_map = NULL;
   }
   reset();
 }
 void MemBaseline::reset() {
   _baselined = false;
   _total_vm_reserved = 0;
   _total_vm_committed = 0;
   _total_malloced = 0;
   _number_of_classes = 0;
   if (_malloc_cs != NULL) _malloc_cs->clear();
   if (_vm_cs != NULL) _vm_cs->clear();
   if (_vm_map != NULL) _vm_map->clear();
   for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) {
     _malloc_data[index].clear();
     _vm_data[index].clear();
     _arena_data[index].clear();
   }
 }
 MemBaseline::~MemBaseline() {
   clear();
 }
 // baseline malloc'd memory records, generate overall summary and summaries by
 // memory types
 bool MemBaseline::baseline_malloc_summary(const MemPointerArray* malloc_records) {
   MemPointerArrayIteratorImpl malloc_itr((MemPointerArray*)malloc_records);
   MemPointerRecord* malloc_ptr = (MemPointerRecord*)malloc_itr.current();
   size_t used_arena_size = 0;
   int index;
   while (malloc_ptr != NULL) {
     index = flag2index(FLAGS_TO_MEMORY_TYPE(malloc_ptr->flags()));
     size_t size = malloc_ptr->size();
     _total_malloced += size;
     _malloc_data[index].inc(size);
     if (MemPointerRecord::is_arena_record(malloc_ptr->flags())) {
       // see if arena size record present
       MemPointerRecord* next_malloc_ptr = (MemPointerRecordEx*)malloc_itr.peek_next();
       if (MemPointerRecord::is_arena_size_record(next_malloc_ptr->flags())) {
         assert(next_malloc_ptr->is_size_record_of_arena(malloc_ptr), "arena records do not match");
         size = next_malloc_ptr->size();
         _arena_data[index].inc(size);
         used_arena_size += size;
         malloc_itr.next();
       }
     }
     malloc_ptr = (MemPointerRecordEx*)malloc_itr.next();
   }
   // substract used arena size to get size of arena chunk in free list
   index = flag2index(mtChunk);
   _malloc_data[index].reduce(used_arena_size);
   // we really don't know how many chunks in free list, so just set to
   // 0
   _malloc_data[index].overwrite_counter(0);
   return true;
 }
 // baseline mmap'd memory records, generate overall summary and summaries by
 // memory types
 bool MemBaseline::baseline_vm_summary(const MemPointerArray* vm_records) {
   MemPointerArrayIteratorImpl vm_itr((MemPointerArray*)vm_records);
   VMMemRegion* vm_ptr = (VMMemRegion*)vm_itr.current();
   int index;
   while (vm_ptr != NULL) {
     if (vm_ptr->is_reserved_region()) {
       index = flag2index(FLAGS_TO_MEMORY_TYPE(vm_ptr->flags()));
     // we use the number of thread stack to count threads
       if (IS_MEMORY_TYPE(vm_ptr->flags(), mtThreadStack)) {
       _number_of_threads ++;
     }
       _total_vm_reserved += vm_ptr->size();
       _vm_data[index].inc(vm_ptr->size(), 0);
     } else {
       _total_vm_committed += vm_ptr->size();
       _vm_data[index].inc(0, vm_ptr->size());
     }
     vm_ptr = (VMMemRegion*)vm_itr.next();
   }
   return true;
 }
 // baseline malloc'd memory by callsites, but only the callsites with memory allocation
 // over 1KB are stored.
 bool MemBaseline::baseline_malloc_details(const MemPointerArray* malloc_records) {
   assert(MemTracker::track_callsite(), "detail tracking is off");
   MemPointerArrayIteratorImpl malloc_itr(const_cast<MemPointerArray*>(malloc_records));
   MemPointerRecordEx* malloc_ptr = (MemPointerRecordEx*)malloc_itr.current();
   MallocCallsitePointer malloc_callsite;
   // initailize malloc callsite array
   if (_malloc_cs == NULL) {
     _malloc_cs = new (std::nothrow) MemPointerArrayImpl<MallocCallsitePointer>(64);
     // out of native memory
     if (_malloc_cs == NULL || _malloc_cs->out_of_memory()) {
       return false;
     }
   } else {
     _malloc_cs->clear();
   }
   MemPointerArray* malloc_data = const_cast<MemPointerArray*>(malloc_records);
   // sort into callsite pc order. Details are aggregated by callsites
   malloc_data->sort((FN_SORT)malloc_sort_by_pc);
   bool ret = true;
   // baseline memory that is totaled over 1 KB
   while (malloc_ptr != NULL) {
     if (!MemPointerRecord::is_arena_size_record(malloc_ptr->flags())) {
       // skip thread stacks
       if (!IS_MEMORY_TYPE(malloc_ptr->flags(), mtThreadStack)) {
         if (malloc_callsite.addr() != malloc_ptr->pc()) {
           if ((malloc_callsite.amount()/K) > 0) {
             if (!_malloc_cs->append(&malloc_callsite)) {
               ret = false;
               break;
             }
           }
           malloc_callsite = MallocCallsitePointer(malloc_ptr->pc());
         }
         malloc_callsite.inc(malloc_ptr->size());
       }
     }
     malloc_ptr = (MemPointerRecordEx*)malloc_itr.next();
   }
   // restore to address order. Snapshot malloc data is maintained in memory
   // address order.
   malloc_data->sort((FN_SORT)malloc_sort_by_addr);
   if (!ret) {
               return false;
             }
   // deal with last record
   if (malloc_callsite.addr() != 0 && (malloc_callsite.amount()/K) > 0) {
     if (!_malloc_cs->append(&malloc_callsite)) {
       return false;
     }
   }
   return true;
 }
 // baseline mmap'd memory by callsites
 bool MemBaseline::baseline_vm_details(const MemPointerArray* vm_records) {
   assert(MemTracker::track_callsite(), "detail tracking is off");
   VMCallsitePointer  vm_callsite;
   VMCallsitePointer* cur_callsite = NULL;
   MemPointerArrayIteratorImpl vm_itr((MemPointerArray*)vm_records);
   VMMemRegionEx* vm_ptr = (VMMemRegionEx*)vm_itr.current();
   // initialize virtual memory map array
   if (_vm_map == NULL) {
     _vm_map = new (std::nothrow) MemPointerArrayImpl<VMMemRegionEx>(vm_records->length());
    if (_vm_map == NULL || _vm_map->out_of_memory()) {
      return false;
    }
   } else {
     _vm_map->clear();
   }
   // initialize virtual memory callsite array
   if (_vm_cs == NULL) {
     _vm_cs = new (std::nothrow) MemPointerArrayImpl<VMCallsitePointer>(64);
     if (_vm_cs == NULL || _vm_cs->out_of_memory()) {
       return false;
     }
   } else {
     _vm_cs->clear();
   }
   // consolidate virtual memory data
   VMMemRegionEx*     reserved_rec = NULL;
   VMMemRegionEx*     committed_rec = NULL;
   // vm_ptr is coming in increasing base address order
   while (vm_ptr != NULL) {
     if (vm_ptr->is_reserved_region()) {
       // consolidate reserved memory regions for virtual memory map.
       // The criteria for consolidation is:
       // 1. two adjacent reserved memory regions
       // 2. belong to the same memory type
       // 3. reserved from the same callsite
       if (reserved_rec == NULL ||
         reserved_rec->base() + reserved_rec->size() != vm_ptr->addr() ||
         FLAGS_TO_MEMORY_TYPE(reserved_rec->flags()) != FLAGS_TO_MEMORY_TYPE(vm_ptr->flags()) ||
         reserved_rec->pc() != vm_ptr->pc()) {
         if (!_vm_map->append(vm_ptr)) {
         return false;
       }
         // inserted reserved region, we need the pointer to the element in virtual
         // memory map array.
         reserved_rec = (VMMemRegionEx*)_vm_map->at(_vm_map->length() - 1);
       } else {
         reserved_rec->expand_region(vm_ptr->addr(), vm_ptr->size());
     }
       if (cur_callsite != NULL && !_vm_cs->append(cur_callsite)) {
       return false;
     }
       vm_callsite = VMCallsitePointer(vm_ptr->pc());
       cur_callsite = &vm_callsite;
       vm_callsite.inc(vm_ptr->size(), 0);
     } else {
       // consolidate committed memory regions for virtual memory map
       // The criterial is:
       // 1. two adjacent committed memory regions
       // 2. committed from the same callsite
       if (committed_rec == NULL ||
         committed_rec->base() + committed_rec->size() != vm_ptr->addr() ||
         committed_rec->pc() != vm_ptr->pc()) {
         if (!_vm_map->append(vm_ptr)) {
           return false;
   }
         committed_rec = (VMMemRegionEx*)_vm_map->at(_vm_map->length() - 1);
     } else {
         committed_rec->expand_region(vm_ptr->addr(), vm_ptr->size());
       }
       vm_callsite.inc(0, vm_ptr->size());
     }
     vm_ptr = (VMMemRegionEx*)vm_itr.next();
   }
   // deal with last record
   if (cur_callsite != NULL && !_vm_cs->append(cur_callsite)) {
     return false;
   }
   // sort it into callsite pc order. Details are aggregated by callsites
   _vm_cs->sort((FN_SORT)bl_vm_sort_by_pc);
   // walk the array to consolidate record by pc
   MemPointerArrayIteratorImpl itr(_vm_cs);
   VMCallsitePointer* callsite_rec = (VMCallsitePointer*)itr.current();
   VMCallsitePointer* next_rec = (VMCallsitePointer*)itr.next();
   while (next_rec != NULL) {
     assert(callsite_rec != NULL, "Sanity check");
     if (next_rec->addr() == callsite_rec->addr()) {
       callsite_rec->inc(next_rec->reserved_amount(), next_rec->committed_amount());
       itr.remove();
       next_rec = (VMCallsitePointer*)itr.current();
     } else {
       callsite_rec = next_rec;
       next_rec = (VMCallsitePointer*)itr.next();
     }
   }
   return true;
 }
 // baseline a snapshot. If summary_only = false, memory usages aggregated by
 // callsites are also baselined.
 bool MemBaseline::baseline(MemSnapshot& snapshot, bool summary_only) {
   MutexLockerEx snapshot_locker(snapshot._lock, true);
   reset();
   _baselined = baseline_malloc_summary(snapshot._alloc_ptrs) &&
                baseline_vm_summary(snapshot._vm_ptrs);
   _number_of_classes = SystemDictionary::number_of_classes();
   if (!summary_only && MemTracker::track_callsite() && _baselined) {
     _baselined =  baseline_malloc_details(snapshot._alloc_ptrs) &&
       baseline_vm_details(snapshot._vm_ptrs);
   }
   return _baselined;
 }
 int MemBaseline::flag2index(MEMFLAGS flag) const {
   for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) {
     if (MemType2NameMap[index]._flag == flag) {
       return index;
     }
   }
   assert(false, "no type");
   return -1;
 }
 const char* MemBaseline::type2name(MEMFLAGS type) {
   for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) {
     if (MemType2NameMap[index]._flag == type) {
       return MemType2NameMap[index]._name;
     }
   }
   assert(false, err_msg("bad type %x", type));
   return NULL;
 }
 MemBaseline& MemBaseline::operator=(const MemBaseline& other) {
   _total_malloced = other._total_malloced;
   _total_vm_reserved = other._total_vm_reserved;
   _total_vm_committed = other._total_vm_committed;
   _baselined = other._baselined;
   _number_of_classes = other._number_of_classes;
   for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) {
     _malloc_data[index] = other._malloc_data[index];
     _vm_data[index] = other._vm_data[index];
     _arena_data[index] = other._arena_data[index];
   }
   if (MemTracker::track_callsite()) {
     assert(_malloc_cs != NULL && _vm_cs != NULL, "out of memory");
     assert(other._malloc_cs != NULL && other._vm_cs != NULL,
            "not properly baselined");
     _malloc_cs->clear();
     _vm_cs->clear();
     int index;
     for (index = 0; index < other._malloc_cs->length(); index ++) {
       _malloc_cs->append(other._malloc_cs->at(index));
     }
     for (index = 0; index < other._vm_cs->length(); index ++) {
       _vm_cs->append(other._vm_cs->at(index));
     }
   }
   return *this;
 }
 /* compare functions for sorting */
 // sort snapshot malloc'd records in callsite pc order
 int MemBaseline::malloc_sort_by_pc(const void* p1, const void* p2) {
   assert(MemTracker::track_callsite(),"Just check");
   const MemPointerRecordEx* mp1 = (const MemPointerRecordEx*)p1;
   const MemPointerRecordEx* mp2 = (const MemPointerRecordEx*)p2;
   return UNSIGNED_COMPARE(mp1->pc(), mp2->pc());
 }
 // sort baselined malloc'd records in size order
 int MemBaseline::bl_malloc_sort_by_size(const void* p1, const void* p2) {
   assert(MemTracker::is_on(), "Just check");
   const MallocCallsitePointer* mp1 = (const MallocCallsitePointer*)p1;
   const MallocCallsitePointer* mp2 = (const MallocCallsitePointer*)p2;
   return UNSIGNED_COMPARE(mp2->amount(), mp1->amount());
 }
 // sort baselined malloc'd records in callsite pc order
 int MemBaseline::bl_malloc_sort_by_pc(const void* p1, const void* p2) {
   assert(MemTracker::is_on(), "Just check");
   const MallocCallsitePointer* mp1 = (const MallocCallsitePointer*)p1;
   const MallocCallsitePointer* mp2 = (const MallocCallsitePointer*)p2;
   return UNSIGNED_COMPARE(mp1->addr(), mp2->addr());
 }
 // sort baselined mmap'd records in size (reserved size) order
 int MemBaseline::bl_vm_sort_by_size(const void* p1, const void* p2) {
   assert(MemTracker::is_on(), "Just check");
   const VMCallsitePointer* mp1 = (const VMCallsitePointer*)p1;
   const VMCallsitePointer* mp2 = (const VMCallsitePointer*)p2;
   return UNSIGNED_COMPARE(mp2->reserved_amount(), mp1->reserved_amount());
 }
 // sort baselined mmap'd records in callsite pc order
 int MemBaseline::bl_vm_sort_by_pc(const void* p1, const void* p2) {
   assert(MemTracker::is_on(), "Just check");
   const VMCallsitePointer* mp1 = (const VMCallsitePointer*)p1;
   const VMCallsitePointer* mp2 = (const VMCallsitePointer*)p2;
   return UNSIGNED_COMPARE(mp1->addr(), mp2->addr());
 }
 // sort snapshot malloc'd records in memory block address order
 int MemBaseline::malloc_sort_by_addr(const void* p1, const void* p2) {
   assert(MemTracker::is_on(), "Just check");
   const MemPointerRecord* mp1 = (const MemPointerRecord*)p1;
   const MemPointerRecord* mp2 = (const MemPointerRecord*)p2;
   int delta = UNSIGNED_COMPARE(mp1->addr(), mp2->addr());
   assert(delta != 0, "dup pointer");
   return delta;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/memBaseline.cpp@69ad7823b1ca (annotated)

src/share/vm/services/memBaseline.cpp