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 /*

  * Copyright (c) 2012, 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

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  */

 #include "precompiled.hpp"

 #include "runtime/mutexLocker.hpp"

 #include "services/nmtDCmd.hpp"

 #include "services/memReporter.hpp"

 #include "services/memTracker.hpp"

 #include "utilities/globalDefinitions.hpp"

 NMTDCmd::NMTDCmd(outputStream* output,

   bool heap): DCmdWithParser(output, heap),

   _summary("summary", "request runtime to report current memory summary, " \

            "which includes total reserved and committed memory, along " \

            "with memory usage summary by each subsytem.",

            "BOOLEAN", false, "false"),

   _detail("detail", "request runtime to report memory allocation >= "

            "1K by each callsite.",

            "BOOLEAN", false, "false"),

   _baseline("baseline", "request runtime to baseline current memory usage, " \

             "so it can be compared against in later time.",

             "BOOLEAN", false, "false"),

   _summary_diff("summary.diff", "request runtime to report memory summary " \

             "comparison against previous baseline.",

             "BOOLEAN", false, "false"),

   _detail_diff("detail.diff", "request runtime to report memory detail " \

             "comparison against previous baseline, which shows the memory " \

             "allocation activities at different callsites.",

             "BOOLEAN", false, "false"),

   _shutdown("shutdown", "request runtime to shutdown itself and free the " \

             "memory used by runtime.",

             "BOOLEAN", false, "false"),

   _statistics("statistics", "print tracker statistics for tuning purpose.", \

             "BOOLEAN", false, "false"),

   _scale("scale", "Memory usage in which scale, KB, MB or GB",

        "STRING", false, "KB") {

   _dcmdparser.add_dcmd_option(&_summary);

   _dcmdparser.add_dcmd_option(&_detail);

   _dcmdparser.add_dcmd_option(&_baseline);

   _dcmdparser.add_dcmd_option(&_summary_diff);

   _dcmdparser.add_dcmd_option(&_detail_diff);

   _dcmdparser.add_dcmd_option(&_shutdown);

   _dcmdparser.add_dcmd_option(&_statistics);

   _dcmdparser.add_dcmd_option(&_scale);

 }

 size_t NMTDCmd::get_scale(const char* scale) const {

   if (scale == NULL) return 0;

   return NMTUtil::scale_from_name(scale);

 }

 void NMTDCmd::execute(DCmdSource source, TRAPS) {

   // Check NMT state

   //  native memory tracking has to be on

   if (MemTracker::tracking_level() == NMT_off) {

     output()->print_cr("Native memory tracking is not enabled");

     return;

   } else if (MemTracker::tracking_level() == NMT_minimal) {

      output()->print_cr("Native memory tracking has been shutdown");

      return;

   }

   const char* scale_value = _scale.value();

   size_t scale_unit = get_scale(scale_value);

   if (scale_unit == 0) {

     output()->print_cr("Incorrect scale value: %s", scale_value);

     return;

   }

   int nopt = 0;

   if (_summary.is_set() && _summary.value()) { ++nopt; }

   if (_detail.is_set() && _detail.value()) { ++nopt; }

   if (_baseline.is_set() && _baseline.value()) { ++nopt; }

   if (_summary_diff.is_set() && _summary_diff.value()) { ++nopt; }

   if (_detail_diff.is_set() && _detail_diff.value()) { ++nopt; }

   if (_shutdown.is_set() && _shutdown.value()) { ++nopt; }

   if (_statistics.is_set() && _statistics.value()) { ++nopt; }

   if (nopt > 1) {

       output()->print_cr("At most one of the following option can be specified: " \

         "summary, detail, baseline, summary.diff, detail.diff, shutdown");

       return;

   } else if (nopt == 0) {

     if (_summary.is_set()) {

       output()->print_cr("No command to execute");

       return;

     } else {

       _summary.set_value(true);

     }

   }

   // Serialize NMT query

   MutexLocker locker(MemTracker::query_lock());

   if (_summary.value()) {

     report(true, scale_unit);

   } else if (_detail.value()) {

     if (!check_detail_tracking_level(output())) {

     return;

   }

     report(false, scale_unit);

   } else if (_baseline.value()) {

     MemBaseline& baseline = MemTracker::get_baseline();

     if (!baseline.baseline(MemTracker::tracking_level() != NMT_detail)) {

       output()->print_cr("Baseline failed");

     } else {

       output()->print_cr("Baseline succeeded");

     }

   } else if (_summary_diff.value()) {

     MemBaseline& baseline = MemTracker::get_baseline();

     if (baseline.baseline_type() >= MemBaseline::Summary_baselined) {

       report_diff(true, scale_unit);

     } else {

       output()->print_cr("No baseline for comparison");

     }

   } else if (_detail_diff.value()) {

     if (!check_detail_tracking_level(output())) {

     return;

   }

     MemBaseline& baseline = MemTracker::get_baseline();

     if (baseline.baseline_type() == MemBaseline::Detail_baselined) {

       report_diff(false, scale_unit);

     } else {

       output()->print_cr("No detail baseline for comparison");

     }

   } else if (_shutdown.value()) {

     MemTracker::shutdown();

     output()->print_cr("Native memory tracking has been turned off");

   } else if (_statistics.value()) {

     if (check_detail_tracking_level(output())) {

       MemTracker::tuning_statistics(output());

     }

   } else {

     ShouldNotReachHere();

     output()->print_cr("Unknown command");

   }

 }

 int NMTDCmd::num_arguments() {

   ResourceMark rm;

   NMTDCmd* dcmd = new NMTDCmd(NULL, false);

   if (dcmd != NULL) {

     DCmdMark mark(dcmd);

     return dcmd->_dcmdparser.num_arguments();

   } else {

     return 0;

   }

 }

 void NMTDCmd::report(bool summaryOnly, size_t scale_unit) {

   MemBaseline baseline;

   if (baseline.baseline(summaryOnly)) {

     if (summaryOnly) {

       MemSummaryReporter rpt(baseline, output(), scale_unit);

       rpt.report();

     } else {

       MemDetailReporter rpt(baseline, output(), scale_unit);

       rpt.report();

     }

   }

 }

 void NMTDCmd::report_diff(bool summaryOnly, size_t scale_unit) {

   MemBaseline& early_baseline = MemTracker::get_baseline();

   assert(early_baseline.baseline_type() != MemBaseline::Not_baselined,

     "Not yet baselined");

   assert(summaryOnly || early_baseline.baseline_type() == MemBaseline::Detail_baselined,

     "Not a detail baseline");

   MemBaseline baseline;

   if (baseline.baseline(summaryOnly)) {

     if (summaryOnly) {

       MemSummaryDiffReporter rpt(early_baseline, baseline, output(), scale_unit);

       rpt.report_diff();

     } else {

       MemDetailDiffReporter rpt(early_baseline, baseline, output(), scale_unit);

       rpt.report_diff();

     }

   }

 }

 bool NMTDCmd::check_detail_tracking_level(outputStream* out) {

   if (MemTracker::tracking_level() == NMT_detail) {

     return true;

   } else if (MemTracker::cmdline_tracking_level() == NMT_detail) {

     out->print_cr("Tracking level has been downgraded due to lack of resources");

     return false;

   } else {

     out->print_cr("Detail tracking is not enabled");

     return false;

   }

 }