afed455e77
the Debug param context --HG-- extra : convert_revision : 40e9dcfa9faedbe0c90a43f908f20a7c14ded6a4
477 lines
12 KiB
C++
477 lines
12 KiB
C++
/*
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* Copyright (c) 2000-2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Steve Raasch
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* Nathan Binkert
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* Steve Reinhardt
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*/
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///
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/// @file sim/main.cc
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///
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#include <Python.h> // must be before system headers... see Python docs
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <errno.h>
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#include <libgen.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <getopt.h>
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#include <list>
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#include <string>
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#include <vector>
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#include "base/callback.hh"
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#include "base/inifile.hh"
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#include "base/misc.hh"
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#include "base/output.hh"
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#include "base/pollevent.hh"
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#include "base/statistics.hh"
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#include "base/str.hh"
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#include "base/time.hh"
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#include "config/pythonhome.hh"
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#include "cpu/base.hh"
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#include "cpu/smt.hh"
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#include "mem/mem_object.hh"
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#include "mem/port.hh"
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#include "sim/async.hh"
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#include "sim/builder.hh"
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#include "sim/host.hh"
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#include "sim/serialize.hh"
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#include "sim/sim_events.hh"
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#include "sim/sim_exit.hh"
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#include "sim/sim_object.hh"
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#include "sim/system.hh"
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#include "sim/stat_control.hh"
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#include "sim/stats.hh"
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#include "sim/root.hh"
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using namespace std;
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// See async.h.
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volatile bool async_event = false;
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volatile bool async_dump = false;
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volatile bool async_dumpreset = false;
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volatile bool async_exit = false;
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volatile bool async_io = false;
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volatile bool async_alarm = false;
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/// Stats signal handler.
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void
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dumpStatsHandler(int sigtype)
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{
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async_event = true;
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async_dump = true;
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}
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void
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dumprstStatsHandler(int sigtype)
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{
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async_event = true;
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async_dumpreset = true;
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}
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/// Exit signal handler.
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void
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exitNowHandler(int sigtype)
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{
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async_event = true;
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async_exit = true;
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}
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/// Abort signal handler.
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void
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abortHandler(int sigtype)
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{
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cerr << "Program aborted at cycle " << curTick << endl;
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#if TRACING_ON
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// dump trace buffer, if there is one
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Trace::theLog.dump(cerr);
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#endif
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}
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extern "C" {
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void init_main();
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void init_debug();
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}
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int
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main(int argc, char **argv)
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{
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signal(SIGFPE, SIG_IGN); // may occur on misspeculated paths
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signal(SIGTRAP, SIG_IGN);
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signal(SIGUSR1, dumpStatsHandler); // dump intermediate stats
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signal(SIGUSR2, dumprstStatsHandler); // dump and reset stats
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signal(SIGINT, exitNowHandler); // dump final stats and exit
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signal(SIGABRT, abortHandler);
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Py_SetProgramName(argv[0]);
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// default path to m5 python code is the currently executing
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// file... Python ZipImporter will find embedded zip archive.
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// The M5_ARCHIVE environment variable can be used to override this.
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char *m5_archive = getenv("M5_ARCHIVE");
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string pythonpath = m5_archive ? m5_archive : argv[0];
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char *oldpath = getenv("PYTHONPATH");
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if (oldpath != NULL) {
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pythonpath += ":";
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pythonpath += oldpath;
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}
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if (setenv("PYTHONPATH", pythonpath.c_str(), true) == -1)
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fatal("setenv: %s\n", strerror(errno));
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char *python_home = getenv("PYTHONHOME");
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if (!python_home)
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python_home = PYTHONHOME;
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Py_SetPythonHome(python_home);
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// initialize embedded Python interpreter
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Py_Initialize();
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PySys_SetArgv(argc, argv);
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// initialize SWIG modules
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init_main();
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init_debug();
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PyRun_SimpleString("import m5.main");
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PyRun_SimpleString("m5.main.main()");
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// clean up Python intepreter.
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Py_Finalize();
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}
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void
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setOutputDir(const string &dir)
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{
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simout.setDirectory(dir);
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}
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IniFile inifile;
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SimObject *
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createSimObject(const string &name)
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{
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return SimObjectClass::createObject(inifile, name);
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}
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/**
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* Pointer to the Python function that maps names to SimObjects.
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*/
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PyObject *resolveFunc = NULL;
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/**
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* Convert a pointer to the Python object that SWIG wraps around a C++
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* SimObject pointer back to the actual C++ pointer. See main.i.
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*/
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extern "C" SimObject *convertSwigSimObjectPtr(PyObject *);
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SimObject *
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resolveSimObject(const string &name)
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{
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PyObject *pyPtr = PyEval_CallFunction(resolveFunc, "(s)", name.c_str());
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if (pyPtr == NULL) {
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PyErr_Print();
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panic("resolveSimObject: failure on call to Python for %s", name);
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}
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SimObject *simObj = convertSwigSimObjectPtr(pyPtr);
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if (simObj == NULL)
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panic("resolveSimObject: failure on pointer conversion for %s", name);
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return simObj;
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}
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/**
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* Load config.ini into C++ database. Exported to Python via SWIG;
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* invoked from m5.instantiate().
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*/
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void
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loadIniFile(PyObject *_resolveFunc)
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{
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resolveFunc = _resolveFunc;
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configStream = simout.find("config.out");
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// The configuration database is now complete; start processing it.
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inifile.load(simout.resolve("config.ini"));
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// Initialize statistics database
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Stats::InitSimStats();
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}
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/**
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* Look up a MemObject port. Helper function for connectPorts().
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*/
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Port *
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lookupPort(SimObject *so, const std::string &name, int i)
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{
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MemObject *mo = dynamic_cast<MemObject *>(so);
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if (mo == NULL) {
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warn("error casting SimObject %s to MemObject", so->name());
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return NULL;
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}
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Port *p = mo->getPort(name, i);
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if (p == NULL)
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warn("error looking up port %s on object %s", name, so->name());
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return p;
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}
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/**
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* Connect the described MemObject ports. Called from Python via SWIG.
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*/
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int
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connectPorts(SimObject *o1, const std::string &name1, int i1,
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SimObject *o2, const std::string &name2, int i2)
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{
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Port *p1 = lookupPort(o1, name1, i1);
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Port *p2 = lookupPort(o2, name2, i2);
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if (p1 == NULL || p2 == NULL) {
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warn("connectPorts: port lookup error");
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return 0;
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}
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p1->setPeer(p2);
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p2->setPeer(p1);
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return 1;
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}
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/**
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* Do final initialization steps after object construction but before
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* start of simulation.
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*/
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void
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finalInit()
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{
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// Parse and check all non-config-hierarchy parameters.
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ParamContext::parseAllContexts(inifile);
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ParamContext::checkAllContexts();
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// Echo all parameter settings to stats file as well.
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ParamContext::showAllContexts(*configStream);
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// Do a second pass to finish initializing the sim objects
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SimObject::initAll();
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// Restore checkpointed state, if any.
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#if 0
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configHierarchy.unserializeSimObjects();
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#endif
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SimObject::regAllStats();
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// Check to make sure that the stats package is properly initialized
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Stats::check();
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// Reset to put the stats in a consistent state.
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Stats::reset();
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SimStartup();
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}
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/** Simulate for num_cycles additional cycles. If num_cycles is -1
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* (the default), do not limit simulation; some other event must
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* terminate the loop. Exported to Python via SWIG.
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* @return The SimLoopExitEvent that caused the loop to exit.
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*/
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SimLoopExitEvent *
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simulate(Tick num_cycles = MaxTick)
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{
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warn("Entering event queue @ %d. Starting simulation...\n", curTick);
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if (num_cycles < 0)
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fatal("simulate: num_cycles must be >= 0 (was %d)\n", num_cycles);
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else if (curTick + num_cycles < 0) //Overflow
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num_cycles = MaxTick;
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else
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num_cycles = curTick + num_cycles;
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Event *limit_event = schedExitSimLoop("simulate() limit reached",
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num_cycles);
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while (1) {
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// there should always be at least one event (the SimLoopExitEvent
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// we just scheduled) in the queue
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assert(!mainEventQueue.empty());
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assert(curTick <= mainEventQueue.nextTick() &&
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"event scheduled in the past");
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// forward current cycle to the time of the first event on the
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// queue
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curTick = mainEventQueue.nextTick();
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Event *exit_event = mainEventQueue.serviceOne();
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if (exit_event != NULL) {
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// hit some kind of exit event; return to Python
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// event must be subclass of SimLoopExitEvent...
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SimLoopExitEvent *se_event = dynamic_cast<SimLoopExitEvent *>(exit_event);
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if (se_event == NULL)
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panic("Bogus exit event class!");
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// if we didn't hit limit_event, delete it
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if (se_event != limit_event) {
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assert(limit_event->scheduled());
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limit_event->deschedule();
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delete limit_event;
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}
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return se_event;
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}
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if (async_event) {
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async_event = false;
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if (async_dump) {
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async_dump = false;
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using namespace Stats;
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SetupEvent(Dump, curTick);
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}
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if (async_dumpreset) {
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async_dumpreset = false;
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using namespace Stats;
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SetupEvent(Dump | Reset, curTick);
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}
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if (async_exit) {
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async_exit = false;
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exitSimLoop("user interrupt received");
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}
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if (async_io || async_alarm) {
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async_io = false;
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async_alarm = false;
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pollQueue.service();
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}
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}
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}
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// not reached... only exit is return on SimLoopExitEvent
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}
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Event *
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createCountedDrain()
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{
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return new CountedDrainEvent();
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}
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void
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cleanupCountedDrain(Event *counted_drain)
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{
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CountedDrainEvent *event =
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dynamic_cast<CountedDrainEvent *>(counted_drain);
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if (event == NULL) {
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fatal("Called cleanupCountedDrain() on an event that was not "
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"a CountedDrainEvent.");
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}
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assert(event->getCount() == 0);
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delete event;
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}
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void
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serializeAll(const std::string &cpt_dir)
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{
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Serializable::serializeAll(cpt_dir);
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}
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void
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unserializeAll(const std::string &cpt_dir)
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{
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Serializable::unserializeAll(cpt_dir);
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}
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/**
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* Queue of C++ callbacks to invoke on simulator exit.
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*/
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CallbackQueue&
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exitCallbacks()
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{
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static CallbackQueue theQueue;
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return theQueue;
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}
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/**
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* Register an exit callback.
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*/
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void
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registerExitCallback(Callback *callback)
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{
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exitCallbacks().add(callback);
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}
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BaseCPU *
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convertToBaseCPUPtr(SimObject *obj)
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{
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BaseCPU *ptr = dynamic_cast<BaseCPU *>(obj);
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if (ptr == NULL)
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warn("Casting to BaseCPU pointer failed");
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return ptr;
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}
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System *
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convertToSystemPtr(SimObject *obj)
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{
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System *ptr = dynamic_cast<System *>(obj);
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if (ptr == NULL)
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warn("Casting to System pointer failed");
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return ptr;
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}
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/**
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* Do C++ simulator exit processing. Exported to SWIG to be invoked
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* when simulator terminates via Python's atexit mechanism.
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*/
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void
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doExitCleanup()
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{
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exitCallbacks().process();
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exitCallbacks().clear();
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cout.flush();
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ParamContext::cleanupAllContexts();
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// print simulation stats
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Stats::DumpNow();
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}
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