Mercurial > hg > graal-compiler
view src/share/vm/services/memTracker.hpp @ 14470:f6490a5f084a
8033440: jmap reports unexpected used/free size of concurrent mark-sweep generation
Summary: SA used the wrong type for the indexedFreeList in CompactibleFreeListSpace.
Reviewed-by: coleenp, dsamersoff
author | sjohanss |
---|---|
date | Mon, 17 Feb 2014 09:51:37 +0100 |
parents | 4c84d351cca9 |
children | 833b0f92429a |
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/* * 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