1 /*
   2  * Copyright (c) 1998, 2017, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "precompiled.hpp"
  26 #include "classfile/systemDictionary.hpp"
  27 #include "code/codeCache.hpp"
  28 #include "gc/shared/collectedHeap.inline.hpp"
  29 #include "gc/shared/generation.hpp"
  30 #include "interpreter/oopMapCache.hpp"
  31 #include "memory/resourceArea.hpp"
  32 #include "runtime/handles.inline.hpp"
  33 #include "runtime/jniHandles.hpp"
  34 #include "runtime/memprofiler.hpp"
  35 #include "runtime/mutexLocker.hpp"
  36 #include "runtime/os.hpp"
  37 #include "runtime/task.hpp"
  38 #include "runtime/thread.inline.hpp"
  39 #include "runtime/vmThread.hpp"
  40 
  41 #ifndef PRODUCT
  42 
  43 // --------------------------------------------------------
  44 // MemProfilerTask
  45 
  46 class MemProfilerTask : public PeriodicTask {
  47  public:
  48   MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {}
  49   void task();
  50 };
  51 
  52 
  53 void MemProfilerTask::task() {
  54   // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list.
  55   MutexLocker mu(Threads_lock);
  56   MemProfiler::do_trace();
  57 }
  58 
  59 
  60 //----------------------------------------------------------
  61 // Implementation of MemProfiler
  62 
  63 MemProfilerTask* MemProfiler::_task   = NULL;
  64 FILE*            MemProfiler::_log_fp = NULL;
  65 
  66 
  67 bool MemProfiler::is_active() {
  68   return _task != NULL;
  69 }
  70 
  71 
  72 void MemProfiler::engage() {
  73   const char *log_name = "mprofile.log";
  74   if (!is_active()) {
  75     // Create log file
  76     _log_fp = fopen(log_name , "w+");
  77     if (_log_fp == NULL) {
  78       fatal("MemProfiler: Cannot create log file: %s", log_name);
  79     }
  80     fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n");
  81     fprintf(_log_fp, "  time, #thr, #cls,  heap,  heap,  perm,  perm,  code, hndls, rescs, oopmp\n");
  82     fprintf(_log_fp, "                     used, total,  used, total, total, total, total, total\n");
  83     fprintf(_log_fp, "--------------------------------------------------------------------------\n");
  84 
  85     _task = new MemProfilerTask(MemProfilingInterval);
  86     _task->enroll();
  87   }
  88 }
  89 
  90 
  91 void MemProfiler::disengage() {
  92   if (!is_active()) return;
  93   // Do one last trace at disengage time
  94   do_trace();
  95 
  96   // Close logfile
  97   fprintf(_log_fp, "MemProfiler detached\n");
  98   fclose(_log_fp);
  99 
 100   // remove MemProfilerTask
 101   assert(_task != NULL, "sanity check");
 102   _task->disenroll();
 103   delete _task;
 104   _task = NULL;
 105 }
 106 
 107 
 108 void MemProfiler::do_trace() {
 109   // Calculate thread local sizes
 110   size_t handles_memory_usage    = VMThread::vm_thread()->handle_area()->size_in_bytes();
 111   size_t resource_memory_usage   = VMThread::vm_thread()->resource_area()->size_in_bytes();
 112   JavaThread *cur = Threads::first();
 113   while (cur != NULL) {
 114     handles_memory_usage  += cur->handle_area()->size_in_bytes();
 115     resource_memory_usage += cur->resource_area()->size_in_bytes();
 116     cur = cur->next();
 117   }
 118 
 119   // Print trace line in log
 120   fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",",
 121           os::elapsedTime(),
 122           Threads::number_of_threads(),
 123           InstanceKlass::number_of_instance_classes(),
 124           Universe::heap()->used() / K,
 125           Universe::heap()->capacity() / K);
 126 
 127   fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K);
 128 
 129   fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n",
 130           handles_memory_usage / K,
 131           resource_memory_usage / K,
 132           0L);
 133   fflush(_log_fp);
 134 }
 135 
 136 #endif