jdk8-mips64-public/hotspot: src/share/vm/services/memTracker.hpp@f42c10a3d4b1 (annotated)

src/share/vm/services/memTracker.hpp@f42c10a3d4b1 (annotated)

src/share/vm/services/memTracker.hpp

Mon, 31 Mar 2014 13:09:35 -0700

author: minqi
date: Mon, 31 Mar 2014 13:09:35 -0700
changeset 6535: f42c10a3d4b1
parent 5578: 4c84d351cca9
child 6876: 710a3c8b516e
child 7074: 833b0f92429a
permissions: -rw-r--r--

7090324: gclog rotation via external tool
Summary: GC log rotation can be set via java command line, but customer sometime need to sync with OS level rotation setting.
Reviewed-by: sla, minqi, ehelin
Contributed-by: suenaga.yasumasa@lab.ntt.co.jp

 /*
  * Copyright (c) 2012, 2013, 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_MEM_TRACKER_HPP
 #define SHARE_VM_SERVICES_MEM_TRACKER_HPP
 #include "utilities/macros.hpp"
 #if !INCLUDE_NMT
 #include "utilities/ostream.hpp"
 class BaselineOutputer : public StackObj {
 };
 class BaselineTTYOutputer : public BaselineOutputer {
   public:
     BaselineTTYOutputer(outputStream* st) { }
 };
 class MemTracker : AllStatic {
   public:
    enum ShutdownReason {
       NMT_shutdown_none,     // no shutdown requested
       NMT_shutdown_user,     // user requested shutdown
       NMT_normal,            // normal shutdown, process exit
       NMT_out_of_memory,     // shutdown due to out of memory
       NMT_initialization,    // shutdown due to initialization failure
       NMT_use_malloc_only,   // can not combine NMT with UseMallocOnly flag
       NMT_error_reporting,   // shutdown by vmError::report_and_die()
       NMT_out_of_generation, // running out of generation queue
       NMT_sequence_overflow  // overflow the sequence number
    };
   class Tracker {
    public:
     void discard() { }
     void record(address addr, size_t size = 0, MEMFLAGS flags = mtNone, address pc = NULL) { }
     void record(address old_addr, address new_addr, size_t size,
       MEMFLAGS flags, address pc = NULL) { }
   };
   private:
    static Tracker  _tkr;
   public:
    static inline void init_tracking_options(const char* option_line) { }
    static inline bool is_on()   { return false; }
    static const char* reason()  { return "Native memory tracking is not implemented"; }
    static inline bool can_walk_stack() { return false; }
    static inline void bootstrap_single_thread() { }
    static inline void bootstrap_multi_thread() { }
    static inline void start() { }
    static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
         address pc = 0, Thread* thread = NULL) { }
    static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) { }
    static inline void record_arena_size(address addr, size_t size) { }
    static inline void record_virtual_memory_reserve(address addr, size_t size,
         MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { }
    static inline void record_virtual_memory_reserve_and_commit(address addr, size_t size,
         MEMFLAGS flags, address pc = 0, Thread* thread = NULL) { }
    static inline void record_virtual_memory_commit(address addr, size_t size,
         address pc = 0, Thread* thread = NULL) { }
    static inline void record_virtual_memory_release(address addr, size_t size,
         Thread* thread = NULL) { }
    static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
         Thread* thread = NULL) { }
    static inline Tracker get_realloc_tracker() { return _tkr; }
    static inline Tracker get_virtual_memory_uncommit_tracker() { return _tkr; }
    static inline Tracker get_virtual_memory_release_tracker()  { return _tkr; }
    static inline bool baseline() { return false; }
    static inline bool has_baseline() { return false; }
    static inline void set_autoShutdown(bool value) { }
    static void shutdown(ShutdownReason reason) { }
    static inline bool shutdown_in_progress() { return false; }
    static bool print_memory_usage(BaselineOutputer& out, size_t unit,
             bool summary_only = true) { return false; }
    static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
             bool summary_only = true) { return false; }
    static bool wbtest_wait_for_data_merge() { return false; }
    static inline void sync() { }
    static inline void thread_exiting(JavaThread* thread) { }
 };
 #else // !INCLUDE_NMT
 #include "memory/allocation.hpp"
 #include "runtime/globals.hpp"
 #include "runtime/mutex.hpp"
 #include "runtime/os.hpp"
 #include "runtime/thread.hpp"
 #include "services/memPtr.hpp"
 #include "services/memRecorder.hpp"
 #include "services/memSnapshot.hpp"
 #include "services/memTrackWorker.hpp"
 extern bool NMT_track_callsite;
 #ifndef MAX_UNSIGNED_LONG
 #define MAX_UNSIGNED_LONG    (unsigned long)(-1)
 #endif
 #ifdef ASSERT
   #define DEBUG_CALLER_PC  (NMT_track_callsite ? os::get_caller_pc(2) : 0)
 #else
   #define DEBUG_CALLER_PC  0
 #endif
 // The thread closure walks threads to collect per-thread
 // memory recorders at NMT sync point
 class SyncThreadRecorderClosure : public ThreadClosure {
  private:
   int _thread_count;
  public:
   SyncThreadRecorderClosure() {
     _thread_count =0;
   }
   void do_thread(Thread* thread);
   int  get_thread_count() const {
     return _thread_count;
   }
 };
 class BaselineOutputer;
 class MemSnapshot;
 class MemTrackWorker;
 class Thread;
 /*
  * MemTracker is the 'gate' class to native memory tracking runtime.
  */
 class MemTracker : AllStatic {
   friend class GenerationData;
   friend class MemTrackWorker;
   friend class MemSnapshot;
   friend class SyncThreadRecorderClosure;
   // NMT state
   enum NMTStates {
     NMT_uninited,                        // not yet initialized
     NMT_bootstrapping_single_thread,     // bootstrapping, VM is in single thread mode
     NMT_bootstrapping_multi_thread,      // bootstrapping, VM is about to enter multi-thread mode
     NMT_started,                         // NMT fully started
     NMT_shutdown_pending,                // shutdown pending
     NMT_final_shutdown,                  // in final phase of shutdown
     NMT_shutdown                         // shutdown
   };
  public:
   class Tracker : public StackObj {
     friend class MemTracker;
    public:
     enum MemoryOperation {
       NoOp,                   // no op
       Malloc,                 // malloc
       Realloc,                // realloc
       Free,                   // free
       Reserve,                // virtual memory reserve
       Commit,                 // virtual memory commit
       ReserveAndCommit,       // virtual memory reserve and commit
       StackAlloc = ReserveAndCommit, // allocate thread stack
       Type,                   // assign virtual memory type
       Uncommit,               // virtual memory uncommit
       Release,                // virtual memory release
       ArenaSize,              // set arena size
       StackRelease            // release thread stack
     };
    protected:
     Tracker(MemoryOperation op, Thread* thr = NULL);
    public:
     void discard();
     void record(address addr, size_t size = 0, MEMFLAGS flags = mtNone, address pc = NULL);
     void record(address old_addr, address new_addr, size_t size,
       MEMFLAGS flags, address pc = NULL);
    private:
     bool            _need_thread_critical_lock;
     JavaThread*     _java_thread;
     MemoryOperation _op;          // memory operation
     jint            _seq;         // reserved sequence number
   };
  public:
   // native memory tracking level
   enum NMTLevel {
     NMT_off,              // native memory tracking is off
     NMT_summary,          // don't track callsite
     NMT_detail            // track callsite also
   };
    enum ShutdownReason {
      NMT_shutdown_none,     // no shutdown requested
      NMT_shutdown_user,     // user requested shutdown
      NMT_normal,            // normal shutdown, process exit
      NMT_out_of_memory,     // shutdown due to out of memory
      NMT_initialization,    // shutdown due to initialization failure
      NMT_use_malloc_only,   // can not combine NMT with UseMallocOnly flag
      NMT_error_reporting,   // shutdown by vmError::report_and_die()
      NMT_out_of_generation, // running out of generation queue
      NMT_sequence_overflow  // overflow the sequence number
    };
  public:
   // initialize NMT tracking level from command line options, called
    // from VM command line parsing code
   static void init_tracking_options(const char* option_line);
   // if NMT is enabled to record memory activities
   static inline bool is_on() {
     return (_tracking_level >= NMT_summary &&
       _state >= NMT_bootstrapping_single_thread);
   }
   static inline enum NMTLevel tracking_level() {
     return _tracking_level;
   }
   // user readable reason for shutting down NMT
   static const char* reason() {
     switch(_reason) {
       case NMT_shutdown_none:
         return "Native memory tracking is not enabled";
       case NMT_shutdown_user:
         return "Native memory tracking has been shutdown by user";
       case NMT_normal:
         return "Native memory tracking has been shutdown due to process exiting";
       case NMT_out_of_memory:
         return "Native memory tracking has been shutdown due to out of native memory";
       case NMT_initialization:
         return "Native memory tracking failed to initialize";
       case NMT_error_reporting:
         return "Native memory tracking has been shutdown due to error reporting";
       case NMT_out_of_generation:
         return "Native memory tracking has been shutdown due to running out of generation buffer";
       case NMT_sequence_overflow:
         return "Native memory tracking has been shutdown due to overflow the sequence number";
       case NMT_use_malloc_only:
         return "Native memory tracking is not supported when UseMallocOnly is on";
       default:
         ShouldNotReachHere();
         return NULL;
     }
   }
   // test if we can walk native stack
   static bool can_walk_stack() {
   // native stack is not walkable during bootstrapping on sparc
 #if defined(SPARC)
     return (_state == NMT_started);
 #else
     return (_state >= NMT_bootstrapping_single_thread && _state  <= NMT_started);
 #endif
   }
   // if native memory tracking tracks callsite
   static inline bool track_callsite() { return _tracking_level == NMT_detail; }
   // NMT automatically shuts itself down under extreme situation by default.
   // When the value is set to false,  NMT will try its best to stay alive,
   // even it has to slow down VM.
   static inline void set_autoShutdown(bool value) {
     AutoShutdownNMT = value;
     if (AutoShutdownNMT && _slowdown_calling_thread) {
       _slowdown_calling_thread = false;
     }
   }
   // shutdown native memory tracking capability. Native memory tracking
   // can be shutdown by VM when it encounters low memory scenarios.
   // Memory tracker should gracefully shutdown itself, and preserve the
   // latest memory statistics for post morten diagnosis.
   static void shutdown(ShutdownReason reason);
   // if there is shutdown requested
   static inline bool shutdown_in_progress() {
     return (_state >= NMT_shutdown_pending);
   }
   // bootstrap native memory tracking, so it can start to collect raw data
   // before worker thread can start
   // the first phase of bootstrapping, when VM still in single-threaded mode
   static void bootstrap_single_thread();
   // the second phase of bootstrapping, VM is about or already in multi-threaded mode
   static void bootstrap_multi_thread();
   // start() has to be called when VM still in single thread mode, but after
   // command line option parsing is done.
   static void start();
   // record a 'malloc' call
   static inline void record_malloc(address addr, size_t size, MEMFLAGS flags,
                             address pc = 0, Thread* thread = NULL) {
     Tracker tkr(Tracker::Malloc, thread);
     tkr.record(addr, size, flags, pc);
   }
   // record a 'free' call
   static inline void record_free(address addr, MEMFLAGS flags, Thread* thread = NULL) {
     Tracker tkr(Tracker::Free, thread);
     tkr.record(addr, 0, flags, DEBUG_CALLER_PC);
   }
   static inline void record_arena_size(address addr, size_t size) {
     Tracker tkr(Tracker::ArenaSize);
     tkr.record(addr, size);
   }
   // record a virtual memory 'reserve' call
   static inline void record_virtual_memory_reserve(address addr, size_t size,
                      MEMFLAGS flags, address pc = 0, Thread* thread = NULL) {
     assert(size > 0, "Sanity check");
     Tracker tkr(Tracker::Reserve, thread);
     tkr.record(addr, size, flags, pc);
   }
   static inline void record_thread_stack(address addr, size_t size, Thread* thr,
                            address pc = 0) {
     Tracker tkr(Tracker::StackAlloc, thr);
     tkr.record(addr, size, mtThreadStack, pc);
   }
   static inline void release_thread_stack(address addr, size_t size, Thread* thr) {
     Tracker tkr(Tracker::StackRelease, thr);
     tkr.record(addr, size, mtThreadStack, DEBUG_CALLER_PC);
   }
   // record a virtual memory 'commit' call
   static inline void record_virtual_memory_commit(address addr, size_t size,
                             address pc, Thread* thread = NULL) {
     Tracker tkr(Tracker::Commit, thread);
     tkr.record(addr, size, mtNone, pc);
   }
   static inline void record_virtual_memory_reserve_and_commit(address addr, size_t size,
     MEMFLAGS flags, address pc, Thread* thread = NULL) {
     Tracker tkr(Tracker::ReserveAndCommit, thread);
     tkr.record(addr, size, flags, pc);
   }
   static inline void record_virtual_memory_release(address addr, size_t size,
       Thread* thread = NULL) {
     if (is_on()) {
       Tracker tkr(Tracker::Release, thread);
       tkr.record(addr, size);
     }
   }
   // record memory type on virtual memory base address
   static inline void record_virtual_memory_type(address base, MEMFLAGS flags,
                             Thread* thread = NULL) {
     Tracker tkr(Tracker::Type);
     tkr.record(base, 0, flags);
   }
   // Get memory trackers for memory operations that can result race conditions.
   // The memory tracker has to be obtained before realloc, virtual memory uncommit
   // and virtual memory release, and call tracker.record() method if operation
   // succeeded, or tracker.discard() to abort the tracking.
   static inline Tracker get_realloc_tracker() {
     return Tracker(Tracker::Realloc);
   }
   static inline Tracker get_virtual_memory_uncommit_tracker() {
     return Tracker(Tracker::Uncommit);
   }
   static inline Tracker get_virtual_memory_release_tracker() {
     return Tracker(Tracker::Release);
   }
   // create memory baseline of current memory snapshot
   static bool baseline();
   // is there a memory baseline
   static bool has_baseline() {
     return _baseline.baselined();
   }
   // print memory usage from current snapshot
   static bool print_memory_usage(BaselineOutputer& out, size_t unit,
            bool summary_only = true);
   // compare memory usage between current snapshot and baseline
   static bool compare_memory_usage(BaselineOutputer& out, size_t unit,
            bool summary_only = true);
   // the version for whitebox testing support, it ensures that all memory
   // activities before this method call, are reflected in the snapshot
   // database.
   static bool wbtest_wait_for_data_merge();
   // sync is called within global safepoint to synchronize nmt data
   static void sync();
   // called when a thread is about to exit
   static void thread_exiting(JavaThread* thread);
   // retrieve global snapshot
   static MemSnapshot* get_snapshot() {
     if (shutdown_in_progress()) {
       return NULL;
     }
     return _snapshot;
   }
   // print tracker stats
   NOT_PRODUCT(static void print_tracker_stats(outputStream* st);)
   NOT_PRODUCT(static void walk_stack(int toSkip, char* buf, int len);)
  private:
   // start native memory tracking worker thread
   static bool start_worker(MemSnapshot* snapshot);
   // called by worker thread to complete shutdown process
   static void final_shutdown();
  protected:
   // retrieve per-thread recorder of the specified thread.
   // if the recorder is full, it will be enqueued to overflow
   // queue, a new recorder is acquired from recorder pool or a
   // new instance is created.
   // when thread == NULL, it means global recorder
   static MemRecorder* get_thread_recorder(JavaThread* thread);
   // per-thread recorder pool
   static void release_thread_recorder(MemRecorder* rec);
   static void delete_all_pooled_recorders();
   // pending recorder queue. Recorders are queued to pending queue
   // when they are overflowed or collected at nmt sync point.
   static void enqueue_pending_recorder(MemRecorder* rec);
   static MemRecorder* get_pending_recorders();
   static void delete_all_pending_recorders();
   // write a memory tracking record in recorder
   static void write_tracking_record(address addr, MEMFLAGS type,
     size_t size, jint seq, address pc, JavaThread* thread);
   static bool is_single_threaded_bootstrap() {
     return _state == NMT_bootstrapping_single_thread;
   }
   static void check_NMT_load(Thread* thr) {
     assert(thr != NULL, "Sanity check");
     if (_slowdown_calling_thread && thr != _worker_thread) {
 #ifdef _WINDOWS
       // On Windows, os::NakedYield() does not work as well
       // as os::yield_all()
       os::yield_all();
 #else
      // On Solaris, os::yield_all() depends on os::sleep()
      // which requires JavaTherad in _thread_in_vm state.
      // Transits thread to _thread_in_vm state can be dangerous
      // if caller holds lock, as it may deadlock with Threads_lock.
      // So use NaKedYield instead.
      //
      // Linux and BSD, NakedYield() and yield_all() implementations
      // are the same.
       os::NakedYield();
 #endif
     }
   }
   static void inc_pending_op_count() {
     Atomic::inc(&_pending_op_count);
   }
   static void dec_pending_op_count() {
     Atomic::dec(&_pending_op_count);
     assert(_pending_op_count >= 0, "Sanity check");
   }
  private:
   // retrieve a pooled memory record or create new one if there is not
   // one available
   static MemRecorder* get_new_or_pooled_instance();
   static void create_memory_record(address addr, MEMFLAGS type,
                    size_t size, address pc, Thread* thread);
   static void create_record_in_recorder(address addr, MEMFLAGS type,
                    size_t size, address pc, JavaThread* thread);
   static void set_current_processing_generation(unsigned long generation) {
     _worker_thread_idle = false;
     _processing_generation = generation;
   }
   static void report_worker_idle() {
     _worker_thread_idle = true;
   }
  private:
   // global memory snapshot
   static MemSnapshot*     _snapshot;
   // a memory baseline of snapshot
   static MemBaseline      _baseline;
   // query lock
   static Mutex*           _query_lock;
   // a thread can start to allocate memory before it is attached
   // to VM 'Thread', those memory activities are recorded here.
   // ThreadCritical is required to guard this global recorder.
   static MemRecorder* volatile _global_recorder;
   // main thread id
   debug_only(static intx   _main_thread_tid;)
   // pending recorders to be merged
   static MemRecorder* volatile     _merge_pending_queue;
   NOT_PRODUCT(static volatile jint   _pending_recorder_count;)
   // pooled memory recorders
   static MemRecorder* volatile     _pooled_recorders;
   // memory recorder pool management, uses following
   // counter to determine if a released memory recorder
   // should be pooled
   // latest thread count
   static int               _thread_count;
   // pooled recorder count
   static volatile jint     _pooled_recorder_count;
   // worker thread to merge pending recorders into snapshot
   static MemTrackWorker*  _worker_thread;
   // how many safepoints we skipped without entering sync point
   static int              _sync_point_skip_count;
   // if the tracker is properly intialized
   static bool             _is_tracker_ready;
   // tracking level (off, summary and detail)
   static enum NMTLevel    _tracking_level;
   // current nmt state
   static volatile enum NMTStates   _state;
   // the reason for shutting down nmt
   static enum ShutdownReason       _reason;
   // the generation that NMT is processing
   static volatile unsigned long    _processing_generation;
   // although NMT is still procesing current generation, but
   // there is not more recorder to process, set idle state
   static volatile bool             _worker_thread_idle;
   // if NMT should slow down calling thread to allow
   // worker thread to catch up
   static volatile bool             _slowdown_calling_thread;
   // pending memory op count.
   // Certain memory ops need to pre-reserve sequence number
   // before memory operation can happen to avoid race condition.
   // See MemTracker::Tracker for detail
   static volatile jint             _pending_op_count;
 };
 #endif // !INCLUDE_NMT
 #endif // SHARE_VM_SERVICES_MEM_TRACKER_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/services/memTracker.hpp@f42c10a3d4b1 (annotated)

src/share/vm/services/memTracker.hpp