jdk8-mips64-public/hotspot: src/share/vm/services/mallocTracker.hpp@417e3b8d04c5 (annotated)

src/share/vm/services/mallocTracker.hpp@417e3b8d04c5 (annotated)

src/share/vm/services/mallocTracker.hpp

Fri, 10 Oct 2014 19:36:12 +0000

author: coleenp
date: Fri, 10 Oct 2014 19:36:12 +0000
changeset 7267: 417e3b8d04c5
parent 7080: dd3939fe8424
child 7344: 787c9c28311f
permissions: -rw-r--r--

8059100: SIGSEGV VirtualMemoryTracker::remove_released_region
Summary: Disallow increasing native memory tracking level
Reviewed-by: hseigel, ctornqvi, gtriantafill

 /*
  * 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.
  *
  */
 #ifndef SHARE_VM_SERVICES_MALLOC_TRACKER_HPP
 #define SHARE_VM_SERVICES_MALLOC_TRACKER_HPP
 #if INCLUDE_NMT
 #include "memory/allocation.hpp"
 #include "runtime/atomic.hpp"
 #include "services/nmtCommon.hpp"
 #include "utilities/nativeCallStack.hpp"
 /*
  * This counter class counts memory allocation and deallocation,
  * records total memory allocation size and number of allocations.
  * The counters are updated atomically.
  */
 class MemoryCounter VALUE_OBJ_CLASS_SPEC {
  private:
   size_t   _count;
   size_t   _size;
   DEBUG_ONLY(size_t   _peak_count;)
   DEBUG_ONLY(size_t   _peak_size; )
  public:
   MemoryCounter() : _count(0), _size(0) {
     DEBUG_ONLY(_peak_count = 0;)
     DEBUG_ONLY(_peak_size  = 0;)
   }
   inline void allocate(size_t sz) {
     Atomic::add(1, (volatile MemoryCounterType*)&_count);
     if (sz > 0) {
       Atomic::add((MemoryCounterType)sz, (volatile MemoryCounterType*)&_size);
       DEBUG_ONLY(_peak_size = MAX2(_peak_size, _size));
     }
     DEBUG_ONLY(_peak_count = MAX2(_peak_count, _count);)
   }
   inline void deallocate(size_t sz) {
     assert(_count > 0, "Negative counter");
     assert(_size >= sz, "Negative size");
     Atomic::add(-1, (volatile MemoryCounterType*)&_count);
     if (sz > 0) {
       Atomic::add(-(MemoryCounterType)sz, (volatile MemoryCounterType*)&_size);
     }
   }
   inline void resize(long sz) {
     if (sz != 0) {
       Atomic::add((MemoryCounterType)sz, (volatile MemoryCounterType*)&_size);
       DEBUG_ONLY(_peak_size = MAX2(_size, _peak_size);)
     }
   }
   inline size_t count() const { return _count; }
   inline size_t size()  const { return _size;  }
   DEBUG_ONLY(inline size_t peak_count() const { return _peak_count; })
   DEBUG_ONLY(inline size_t peak_size()  const { return _peak_size; })
 };
 /*
  * Malloc memory used by a particular subsystem.
  * It includes the memory acquired through os::malloc()
  * call and arena's backing memory.
  */
 class MallocMemory VALUE_OBJ_CLASS_SPEC {
  private:
   MemoryCounter _malloc;
   MemoryCounter _arena;
  public:
   MallocMemory() { }
   inline void record_malloc(size_t sz) {
     _malloc.allocate(sz);
   }
   inline void record_free(size_t sz) {
     _malloc.deallocate(sz);
   }
   inline void record_new_arena() {
     _arena.allocate(0);
   }
   inline void record_arena_free() {
     _arena.deallocate(0);
   }
   inline void record_arena_size_change(long sz) {
     _arena.resize(sz);
   }
   inline size_t malloc_size()  const { return _malloc.size(); }
   inline size_t malloc_count() const { return _malloc.count();}
   inline size_t arena_size()   const { return _arena.size();  }
   inline size_t arena_count()  const { return _arena.count(); }
   DEBUG_ONLY(inline const MemoryCounter& malloc_counter() const { return _malloc; })
   DEBUG_ONLY(inline const MemoryCounter& arena_counter()  const { return _arena;  })
 };
 class MallocMemorySummary;
 // A snapshot of malloc'd memory, includes malloc memory
 // usage by types and memory used by tracking itself.
 class MallocMemorySnapshot : public ResourceObj {
   friend class MallocMemorySummary;
  private:
   MallocMemory      _malloc[mt_number_of_types];
   MemoryCounter     _tracking_header;
  public:
   inline MallocMemory*  by_type(MEMFLAGS flags) {
     int index = NMTUtil::flag_to_index(flags);
     return &_malloc[index];
   }
   inline MallocMemory* by_index(int index) {
     assert(index >= 0, "Index out of bound");
     assert(index < mt_number_of_types, "Index out of bound");
     return &_malloc[index];
   }
   inline MemoryCounter* malloc_overhead() {
     return &_tracking_header;
   }
   // Total malloc'd memory amount
   size_t total() const;
   // Total malloc'd memory used by arenas
   size_t total_arena() const;
   inline size_t thread_count() const {
     MallocMemorySnapshot* s = const_cast<MallocMemorySnapshot*>(this);
     return s->by_type(mtThreadStack)->malloc_count();
   }
   void copy_to(MallocMemorySnapshot* s) {
     s->_tracking_header = _tracking_header;
     for (int index = 0; index < mt_number_of_types; index ++) {
       s->_malloc[index] = _malloc[index];
     }
   }
   // Make adjustment by subtracting chunks used by arenas
   // from total chunks to get total free chunk size
   void make_adjustment();
 };
 /*
  * This class is for collecting malloc statistics at summary level
  */
 class MallocMemorySummary : AllStatic {
  private:
   // Reserve memory for placement of MallocMemorySnapshot object
   static size_t _snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)];
  public:
    static void initialize();
    static inline void record_malloc(size_t size, MEMFLAGS flag) {
      as_snapshot()->by_type(flag)->record_malloc(size);
    }
    static inline void record_free(size_t size, MEMFLAGS flag) {
      as_snapshot()->by_type(flag)->record_free(size);
    }
    static inline void record_new_arena(MEMFLAGS flag) {
      as_snapshot()->by_type(flag)->record_new_arena();
    }
    static inline void record_arena_free(MEMFLAGS flag) {
      as_snapshot()->by_type(flag)->record_arena_free();
    }
    static inline void record_arena_size_change(long size, MEMFLAGS flag) {
      as_snapshot()->by_type(flag)->record_arena_size_change(size);
    }
    static void snapshot(MallocMemorySnapshot* s) {
      as_snapshot()->copy_to(s);
      s->make_adjustment();
    }
    // Record memory used by malloc tracking header
    static inline void record_new_malloc_header(size_t sz) {
      as_snapshot()->malloc_overhead()->allocate(sz);
    }
    static inline void record_free_malloc_header(size_t sz) {
      as_snapshot()->malloc_overhead()->deallocate(sz);
    }
    // The memory used by malloc tracking headers
    static inline size_t tracking_overhead() {
      return as_snapshot()->malloc_overhead()->size();
    }
   static MallocMemorySnapshot* as_snapshot() {
     return (MallocMemorySnapshot*)_snapshot;
   }
 };
 /*
  * Malloc tracking header.
  * To satisfy malloc alignment requirement, NMT uses 2 machine words for tracking purpose,
  * which ensures 8-bytes alignment on 32-bit systems and 16-bytes on 64-bit systems (Product build).
  */
 class MallocHeader VALUE_OBJ_CLASS_SPEC {
 #ifdef _LP64
   size_t           _size      : 62;
   size_t           _level     : 2;
   size_t           _flags     : 8;
   size_t           _pos_idx   : 16;
   size_t           _bucket_idx: 40;
 #define MAX_MALLOCSITE_TABLE_SIZE ((size_t)1 << 40)
 #define MAX_BUCKET_LENGTH         ((size_t)(1 << 16))
 #define MAX_MALLOC_SIZE           (((size_t)1 << 62) - 1)
 #else
   size_t           _size      : 30;
   size_t           _level     : 2;
   size_t           _flags     : 8;
   size_t           _pos_idx   : 8;
   size_t           _bucket_idx: 16;
 #define MAX_MALLOCSITE_TABLE_SIZE  ((size_t)(1 << 16))
 #define MAX_BUCKET_LENGTH          ((size_t)(1 << 8))
 // Max malloc size = 1GB - 1 on 32 bit system, such has total 4GB memory
 #define MAX_MALLOC_SIZE            ((size_t)(1 << 30) - 1)
 #endif  // _LP64
  public:
   // Summary tracking header
   MallocHeader(size_t size, MEMFLAGS flags) {
     assert(sizeof(MallocHeader) == sizeof(void*) * 2,
       "Wrong header size");
     _level = NMT_summary;
     _flags = flags;
     set_size(size);
     MallocMemorySummary::record_malloc(size, flags);
     MallocMemorySummary::record_new_malloc_header(sizeof(MallocHeader));
   }
   // Detail tracking header
   MallocHeader(size_t size, MEMFLAGS flags, const NativeCallStack& stack) {
     assert(sizeof(MallocHeader) == sizeof(void*) * 2,
       "Wrong header size");
     _level = NMT_detail;
     _flags = flags;
     set_size(size);
     size_t bucket_idx;
     size_t pos_idx;
     if (record_malloc_site(stack, size, &bucket_idx, &pos_idx)) {
       assert(bucket_idx <= MAX_MALLOCSITE_TABLE_SIZE, "Overflow bucket index");
       assert(pos_idx <= MAX_BUCKET_LENGTH, "Overflow bucket position index");
       _bucket_idx = bucket_idx;
       _pos_idx = pos_idx;
     }
     MallocMemorySummary::record_malloc(size, flags);
     MallocMemorySummary::record_new_malloc_header(sizeof(MallocHeader));
   }
   // Minimal tracking header
   MallocHeader() {
     assert(sizeof(MallocHeader) == sizeof(void*) * 2,
       "Wrong header size");
     _level = (unsigned short)NMT_minimal;
   }
   inline NMT_TrackingLevel tracking_level() const {
     return (NMT_TrackingLevel)_level;
   }
   inline size_t   size()  const { return _size; }
   inline MEMFLAGS flags() const { return (MEMFLAGS)_flags; }
   bool get_stack(NativeCallStack& stack) const;
   // Cleanup tracking information before the memory is released.
   void release() const;
  private:
   inline void set_size(size_t size) {
     assert(size <= MAX_MALLOC_SIZE, "Malloc size too large, should use virtual memory?");
     _size = size;
   }
   bool record_malloc_site(const NativeCallStack& stack, size_t size,
     size_t* bucket_idx, size_t* pos_idx) const;
 };
 // Main class called from MemTracker to track malloc activities
 class MallocTracker : AllStatic {
  public:
   // Initialize malloc tracker for specific tracking level
   static bool initialize(NMT_TrackingLevel level);
   static bool transition(NMT_TrackingLevel from, NMT_TrackingLevel to);
   // malloc tracking header size for specific tracking level
   static inline size_t malloc_header_size(NMT_TrackingLevel level) {
     return (level == NMT_off) ? 0 : sizeof(MallocHeader);
   }
   // Parameter name convention:
   // memblock :   the beginning address for user data
   // malloc_base: the beginning address that includes malloc tracking header
   //
   // The relationship:
   // memblock = (char*)malloc_base + sizeof(nmt header)
   //
   // Record  malloc on specified memory block
   static void* record_malloc(void* malloc_base, size_t size, MEMFLAGS flags,
     const NativeCallStack& stack, NMT_TrackingLevel level);
   // Record free on specified memory block
   static void* record_free(void* memblock);
   // Get tracking level of specified memory block
   static inline NMT_TrackingLevel get_memory_tracking_level(void* memblock);
   // Offset memory address to header address
   static inline void* get_base(void* memblock);
   static inline void* get_base(void* memblock, NMT_TrackingLevel level) {
     if (memblock == NULL || level == NMT_off) return memblock;
     return (char*)memblock - malloc_header_size(level);
   }
   // Get memory size
   static inline size_t get_size(void* memblock) {
     MallocHeader* header = malloc_header(memblock);
     assert(header->tracking_level() >= NMT_summary,
       "Wrong tracking level");
     return header->size();
   }
   // Get memory type
   static inline MEMFLAGS get_flags(void* memblock) {
     MallocHeader* header = malloc_header(memblock);
     assert(header->tracking_level() >= NMT_summary,
       "Wrong tracking level");
     return header->flags();
   }
   // Get header size
   static inline size_t get_header_size(void* memblock) {
     return (memblock == NULL) ? 0 : sizeof(MallocHeader);
   }
   static inline void record_new_arena(MEMFLAGS flags) {
     MallocMemorySummary::record_new_arena(flags);
   }
   static inline void record_arena_free(MEMFLAGS flags) {
     MallocMemorySummary::record_arena_free(flags);
   }
   static inline void record_arena_size_change(int size, MEMFLAGS flags) {
     MallocMemorySummary::record_arena_size_change(size, flags);
   }
  private:
   static inline MallocHeader* malloc_header(void *memblock) {
     assert(memblock != NULL, "NULL pointer");
     MallocHeader* header = (MallocHeader*)((char*)memblock - sizeof(MallocHeader));
     assert(header->tracking_level() >= NMT_minimal, "Bad header");
     return header;
   }
 };
 #endif // INCLUDE_NMT
 #endif //SHARE_VM_SERVICES_MALLOC_TRACKER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/mallocTracker.hpp@417e3b8d04c5 (annotated)

src/share/vm/services/mallocTracker.hpp