main.cc revision 1388
111986Sandreas.sandberg@arm.com/* 211986Sandreas.sandberg@arm.com * Copyright (c) 2000-2004 The Regents of The University of Michigan 311986Sandreas.sandberg@arm.com * All rights reserved. 411986Sandreas.sandberg@arm.com * 511986Sandreas.sandberg@arm.com * Redistribution and use in source and binary forms, with or without 611986Sandreas.sandberg@arm.com * modification, are permitted provided that the following conditions are 711986Sandreas.sandberg@arm.com * met: redistributions of source code must retain the above copyright 811986Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer; 911986Sandreas.sandberg@arm.com * redistributions in binary form must reproduce the above copyright 1011986Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer in the 1112037Sandreas.sandberg@arm.com * documentation and/or other materials provided with the distribution; 1211986Sandreas.sandberg@arm.com * neither the name of the copyright holders nor the names of its 1312391Sjason@lowepower.com * contributors may be used to endorse or promote products derived from 1411986Sandreas.sandberg@arm.com * this software without specific prior written permission. 1511986Sandreas.sandberg@arm.com * 1612037Sandreas.sandberg@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1711986Sandreas.sandberg@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1811986Sandreas.sandberg@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1911986Sandreas.sandberg@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012037Sandreas.sandberg@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112037Sandreas.sandberg@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212037Sandreas.sandberg@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312037Sandreas.sandberg@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412037Sandreas.sandberg@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512037Sandreas.sandberg@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2611986Sandreas.sandberg@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712037Sandreas.sandberg@arm.com */ 2812037Sandreas.sandberg@arm.com 2912037Sandreas.sandberg@arm.com/// 3012037Sandreas.sandberg@arm.com/// @file sim/main.cc 3112037Sandreas.sandberg@arm.com/// 3212037Sandreas.sandberg@arm.com#include <sys/types.h> 3312037Sandreas.sandberg@arm.com#include <sys/stat.h> 3412037Sandreas.sandberg@arm.com#include <stdlib.h> 3512037Sandreas.sandberg@arm.com#include <signal.h> 3612037Sandreas.sandberg@arm.com 3712037Sandreas.sandberg@arm.com#include <list> 3812037Sandreas.sandberg@arm.com#include <string> 3912037Sandreas.sandberg@arm.com#include <vector> 4012037Sandreas.sandberg@arm.com 4112037Sandreas.sandberg@arm.com#include "base/copyright.hh" 4212037Sandreas.sandberg@arm.com#include "base/embedfile.hh" 4312037Sandreas.sandberg@arm.com#include "base/inifile.hh" 4412037Sandreas.sandberg@arm.com#include "base/misc.hh" 4512037Sandreas.sandberg@arm.com#include "base/output.hh" 4612037Sandreas.sandberg@arm.com#include "base/pollevent.hh" 4712037Sandreas.sandberg@arm.com#include "base/statistics.hh" 4812037Sandreas.sandberg@arm.com#include "base/str.hh" 4912037Sandreas.sandberg@arm.com#include "base/time.hh" 5012037Sandreas.sandberg@arm.com#include "cpu/base_cpu.hh" 5112037Sandreas.sandberg@arm.com#include "cpu/full_cpu/smt.hh" 5212037Sandreas.sandberg@arm.com#include "sim/async.hh" 5312037Sandreas.sandberg@arm.com#include "sim/builder.hh" 5412037Sandreas.sandberg@arm.com#include "sim/configfile.hh" 5512037Sandreas.sandberg@arm.com#include "sim/host.hh" 5612037Sandreas.sandberg@arm.com#include "sim/sim_events.hh" 5712037Sandreas.sandberg@arm.com#include "sim/sim_exit.hh" 5812037Sandreas.sandberg@arm.com#include "sim/sim_object.hh" 5912037Sandreas.sandberg@arm.com#include "sim/stat_control.hh" 6012037Sandreas.sandberg@arm.com#include "sim/stats.hh" 6112037Sandreas.sandberg@arm.com#include "sim/universe.hh" 6212037Sandreas.sandberg@arm.com#include "sim/pyconfig/pyconfig.hh" 6312037Sandreas.sandberg@arm.com 6412037Sandreas.sandberg@arm.comusing namespace std; 6512037Sandreas.sandberg@arm.com 6612037Sandreas.sandberg@arm.com// See async.h. 6712037Sandreas.sandberg@arm.comvolatile bool async_event = false; 6812037Sandreas.sandberg@arm.comvolatile bool async_dump = false; 6912037Sandreas.sandberg@arm.comvolatile bool async_dumpreset = false; 7012037Sandreas.sandberg@arm.comvolatile bool async_exit = false; 7112037Sandreas.sandberg@arm.comvolatile bool async_io = false; 7211986Sandreas.sandberg@arm.comvolatile bool async_alarm = false; 7312391Sjason@lowepower.com 7412391Sjason@lowepower.com/// Stats signal handler. 7512391Sjason@lowepower.comvoid 7612391Sjason@lowepower.comdumpStatsHandler(int sigtype) 7712391Sjason@lowepower.com{ 7812391Sjason@lowepower.com async_event = true; 7912391Sjason@lowepower.com async_dump = true; 8012391Sjason@lowepower.com} 8112391Sjason@lowepower.com 8212391Sjason@lowepower.comvoid 8312391Sjason@lowepower.comdumprstStatsHandler(int sigtype) 8411986Sandreas.sandberg@arm.com{ 8511986Sandreas.sandberg@arm.com async_event = true; 8611986Sandreas.sandberg@arm.com async_dumpreset = true; 8712391Sjason@lowepower.com} 8812037Sandreas.sandberg@arm.com 8912037Sandreas.sandberg@arm.com/// Exit signal handler. 9012037Sandreas.sandberg@arm.comvoid 9112037Sandreas.sandberg@arm.comexitNowHandler(int sigtype) 9212037Sandreas.sandberg@arm.com{ 9312037Sandreas.sandberg@arm.com async_event = true; 9412037Sandreas.sandberg@arm.com async_exit = true; 9511986Sandreas.sandberg@arm.com} 9612391Sjason@lowepower.com 9712037Sandreas.sandberg@arm.com/// Abort signal handler. 9812037Sandreas.sandberg@arm.comvoid 9912037Sandreas.sandberg@arm.comabortHandler(int sigtype) 10012037Sandreas.sandberg@arm.com{ 10112037Sandreas.sandberg@arm.com cerr << "Program aborted at cycle " << curTick << endl; 10212037Sandreas.sandberg@arm.com 10312391Sjason@lowepower.com#if TRACING_ON 10412037Sandreas.sandberg@arm.com // dump trace buffer, if there is one 10512037Sandreas.sandberg@arm.com Trace::theLog.dump(cerr); 10612037Sandreas.sandberg@arm.com#endif 10712037Sandreas.sandberg@arm.com} 10812037Sandreas.sandberg@arm.com 10912037Sandreas.sandberg@arm.com/// Simulator executable name 11012037Sandreas.sandberg@arm.comconst char *myProgName = ""; 11112037Sandreas.sandberg@arm.com 11212037Sandreas.sandberg@arm.com/// Show brief help message. 11312037Sandreas.sandberg@arm.comvoid 11412037Sandreas.sandberg@arm.comshowBriefHelp(ostream &out) 11512037Sandreas.sandberg@arm.com{ 11612037Sandreas.sandberg@arm.com char *prog = basename(myProgName); 11712037Sandreas.sandberg@arm.com 11812037Sandreas.sandberg@arm.com ccprintf(out, "Usage:\n"); 11912037Sandreas.sandberg@arm.com ccprintf(out, 12012037Sandreas.sandberg@arm.com"%s [-d <dir>] [-E <var>[=<val>]] [-I <dir>] [-P <python>]\n" 12112037Sandreas.sandberg@arm.com" [--<var>=<val>] <config file>\n" 12212037Sandreas.sandberg@arm.com"\n" 12312037Sandreas.sandberg@arm.com" -d set the output directory to <dir>\n" 12412037Sandreas.sandberg@arm.com" -E set the environment variable <var> to <val> (or 'True')\n" 12512037Sandreas.sandberg@arm.com" -I add the directory <dir> to python's path\n" 12612037Sandreas.sandberg@arm.com" -P execute <python> directly in the configuration\n" 12712037Sandreas.sandberg@arm.com" --var=val set the python variable <var> to '<val>'\n" 12812037Sandreas.sandberg@arm.com" <configfile> config file name (.py or .mpy)\n", 12912037Sandreas.sandberg@arm.com prog); 13012037Sandreas.sandberg@arm.com 13112037Sandreas.sandberg@arm.com ccprintf(out, "%s -X\n -X extract embedded files\n", prog); 13212037Sandreas.sandberg@arm.com ccprintf(out, "%s -h\n -h print long help\n", prog); 13312037Sandreas.sandberg@arm.com} 13412037Sandreas.sandberg@arm.com 13512037Sandreas.sandberg@arm.com/// Show verbose help message. Includes parameter listing from 13612037Sandreas.sandberg@arm.com/// showBriefHelp(), plus an exhaustive list of ini-file parameters 13712037Sandreas.sandberg@arm.com/// and SimObjects (with their parameters). 13812037Sandreas.sandberg@arm.comvoid 13912037Sandreas.sandberg@arm.comshowLongHelp(ostream &out) 14012037Sandreas.sandberg@arm.com{ 14112037Sandreas.sandberg@arm.com showBriefHelp(out); 14212037Sandreas.sandberg@arm.com 14312037Sandreas.sandberg@arm.com out << endl 14412037Sandreas.sandberg@arm.com << endl 14512037Sandreas.sandberg@arm.com << "-----------------" << endl 14612037Sandreas.sandberg@arm.com << "Global Parameters" << endl 14712037Sandreas.sandberg@arm.com << "-----------------" << endl 14812037Sandreas.sandberg@arm.com << endl; 14912037Sandreas.sandberg@arm.com 15012037Sandreas.sandberg@arm.com ParamContext::describeAllContexts(out); 15112037Sandreas.sandberg@arm.com 15212037Sandreas.sandberg@arm.com out << endl 15312037Sandreas.sandberg@arm.com << endl 15412037Sandreas.sandberg@arm.com << "-----------------" << endl 15512037Sandreas.sandberg@arm.com << "Simulator Objects" << endl 15611986Sandreas.sandberg@arm.com << "-----------------" << endl 15711986Sandreas.sandberg@arm.com << endl; 15811986Sandreas.sandberg@arm.com 15911986Sandreas.sandberg@arm.com SimObjectClass::describeAllClasses(out); 16011986Sandreas.sandberg@arm.com} 16111986Sandreas.sandberg@arm.com 16211986Sandreas.sandberg@arm.com/// Print welcome message. 16311986Sandreas.sandberg@arm.comvoid 16411986Sandreas.sandberg@arm.comsayHello(ostream &out) 16511986Sandreas.sandberg@arm.com{ 16611986Sandreas.sandberg@arm.com extern const char *compileDate; // from date.cc 16712391Sjason@lowepower.com 16812037Sandreas.sandberg@arm.com ccprintf(out, "M5 Simulator System\n"); 16912037Sandreas.sandberg@arm.com // display copyright 17012037Sandreas.sandberg@arm.com ccprintf(out, "%s\n", briefCopyright); 17112037Sandreas.sandberg@arm.com ccprintf(out, "M5 compiled on %d\n", compileDate); 17212037Sandreas.sandberg@arm.com 17312037Sandreas.sandberg@arm.com char *host = getenv("HOSTNAME"); 17412037Sandreas.sandberg@arm.com if (!host) 17512037Sandreas.sandberg@arm.com host = getenv("HOST"); 17612037Sandreas.sandberg@arm.com 17712037Sandreas.sandberg@arm.com if (host) 17812037Sandreas.sandberg@arm.com ccprintf(out, "M5 executing on %s\n", host); 17912037Sandreas.sandberg@arm.com 18012037Sandreas.sandberg@arm.com ccprintf(out, "M5 simulation started %s\n", Time::start); 18112037Sandreas.sandberg@arm.com} 18212037Sandreas.sandberg@arm.com 18312037Sandreas.sandberg@arm.com/// 18412037Sandreas.sandberg@arm.com/// Echo the command line for posterity in such a way that it can be 18512037Sandreas.sandberg@arm.com/// used to rerun the same simulation (given the same .ini files). 18612037Sandreas.sandberg@arm.com/// 18712037Sandreas.sandberg@arm.comvoid 18812037Sandreas.sandberg@arm.comechoCommandLine(int argc, char **argv, ostream &out) 18912037Sandreas.sandberg@arm.com{ 19012037Sandreas.sandberg@arm.com out << "command line: " << argv[0]; 19112037Sandreas.sandberg@arm.com for (int i = 1; i < argc; i++) { 19212037Sandreas.sandberg@arm.com string arg(argv[i]); 19312037Sandreas.sandberg@arm.com 19412037Sandreas.sandberg@arm.com out << ' '; 19512037Sandreas.sandberg@arm.com 19612037Sandreas.sandberg@arm.com // If the arg contains spaces, we need to quote it. 19712037Sandreas.sandberg@arm.com // The rest of this is overkill to make it look purty. 19812037Sandreas.sandberg@arm.com 19912037Sandreas.sandberg@arm.com // print dashes first outside quotes 20012037Sandreas.sandberg@arm.com int non_dash_pos = arg.find_first_not_of("-"); 20112037Sandreas.sandberg@arm.com out << arg.substr(0, non_dash_pos); // print dashes 20212037Sandreas.sandberg@arm.com string body = arg.substr(non_dash_pos); // the rest 20312037Sandreas.sandberg@arm.com 20412037Sandreas.sandberg@arm.com // if it's an assignment, handle the lhs & rhs separately 20512037Sandreas.sandberg@arm.com int eq_pos = body.find("="); 20612037Sandreas.sandberg@arm.com if (eq_pos == string::npos) { 20712037Sandreas.sandberg@arm.com out << quote(body); 20812037Sandreas.sandberg@arm.com } 20912037Sandreas.sandberg@arm.com else { 21012037Sandreas.sandberg@arm.com string lhs(body.substr(0, eq_pos)); 21112037Sandreas.sandberg@arm.com string rhs(body.substr(eq_pos + 1)); 21212037Sandreas.sandberg@arm.com 21312037Sandreas.sandberg@arm.com out << quote(lhs) << "=" << quote(rhs); 21412391Sjason@lowepower.com } 21511986Sandreas.sandberg@arm.com } 21611986Sandreas.sandberg@arm.com out << endl << endl; 21711986Sandreas.sandberg@arm.com} 21811986Sandreas.sandberg@arm.com 21911986Sandreas.sandberg@arm.comchar * 22011986Sandreas.sandberg@arm.comgetOptionString(int &index, int argc, char **argv) 22111986Sandreas.sandberg@arm.com{ 22211986Sandreas.sandberg@arm.com char *option = argv[index] + 2; 22311986Sandreas.sandberg@arm.com if (*option != '\0') 22411986Sandreas.sandberg@arm.com return option; 22511986Sandreas.sandberg@arm.com 22611986Sandreas.sandberg@arm.com // We didn't find an argument, it must be in the next variable. 22711986Sandreas.sandberg@arm.com if (++index >= argc) 22811986Sandreas.sandberg@arm.com panic("option string for option '%s' not found", argv[index - 1]); 22911986Sandreas.sandberg@arm.com 23011986Sandreas.sandberg@arm.com return argv[index]; 23112037Sandreas.sandberg@arm.com} 23212037Sandreas.sandberg@arm.com 23312037Sandreas.sandberg@arm.comint 23412037Sandreas.sandberg@arm.commain(int argc, char **argv) 23512037Sandreas.sandberg@arm.com{ 23612037Sandreas.sandberg@arm.com // Save off program name 23712037Sandreas.sandberg@arm.com myProgName = argv[0]; 23811986Sandreas.sandberg@arm.com 23912391Sjason@lowepower.com signal(SIGFPE, SIG_IGN); // may occur on misspeculated paths 24012037Sandreas.sandberg@arm.com signal(SIGTRAP, SIG_IGN); 24112037Sandreas.sandberg@arm.com signal(SIGUSR1, dumpStatsHandler); // dump intermediate stats 24212037Sandreas.sandberg@arm.com signal(SIGUSR2, dumprstStatsHandler); // dump and reset stats 24312037Sandreas.sandberg@arm.com signal(SIGINT, exitNowHandler); // dump final stats and exit 24412037Sandreas.sandberg@arm.com signal(SIGABRT, abortHandler); 24512391Sjason@lowepower.com 24612037Sandreas.sandberg@arm.com sayHello(cerr); 24712037Sandreas.sandberg@arm.com 24812037Sandreas.sandberg@arm.com bool configfile_found = false; 24912391Sjason@lowepower.com PythonConfig pyconfig; 25012037Sandreas.sandberg@arm.com string outdir; 25112037Sandreas.sandberg@arm.com 25212037Sandreas.sandberg@arm.com // Parse command-line options. 25312037Sandreas.sandberg@arm.com // Since most of the complex options are handled through the 25412391Sjason@lowepower.com // config database, we don't mess with getopts, and just parse 25512037Sandreas.sandberg@arm.com // manually. 25612037Sandreas.sandberg@arm.com for (int i = 1; i < argc; ++i) { 25712037Sandreas.sandberg@arm.com char *arg_str = argv[i]; 25812037Sandreas.sandberg@arm.com 25912391Sjason@lowepower.com // if arg starts with '--', parse as a special python option 26012037Sandreas.sandberg@arm.com // of the format --<python var>=<string value>, if the arg 26112037Sandreas.sandberg@arm.com // starts with '-', it should be a simulator option with a 26212037Sandreas.sandberg@arm.com // format similar to getopt. In any other case, treat the 26312037Sandreas.sandberg@arm.com // option as a configuration file name and load it. 26411986Sandreas.sandberg@arm.com if (arg_str[0] == '-' && arg_str[1] == '-') { 26512391Sjason@lowepower.com string str = &arg_str[2]; 26612037Sandreas.sandberg@arm.com string var, val; 26712037Sandreas.sandberg@arm.com 26812037Sandreas.sandberg@arm.com if (!split_first(str, var, val, '=')) 26912037Sandreas.sandberg@arm.com panic("Could not parse configuration argument '%s'\n" 27012037Sandreas.sandberg@arm.com "Expecting --<variable>=<value>\n", arg_str); 27111986Sandreas.sandberg@arm.com 27211986Sandreas.sandberg@arm.com pyconfig.setVariable(var, val); 27312391Sjason@lowepower.com } else if (arg_str[0] == '-') { 27412037Sandreas.sandberg@arm.com char *option; 27512037Sandreas.sandberg@arm.com string var, val; 27612037Sandreas.sandberg@arm.com 27712037Sandreas.sandberg@arm.com // switch on second char 27812037Sandreas.sandberg@arm.com switch (arg_str[1]) { 27912037Sandreas.sandberg@arm.com case 'd': 28012037Sandreas.sandberg@arm.com outdir = getOptionString(i, argc, argv); 28112037Sandreas.sandberg@arm.com break; 28212037Sandreas.sandberg@arm.com 28311986Sandreas.sandberg@arm.com case 'h': 28412391Sjason@lowepower.com showLongHelp(cerr); 28512037Sandreas.sandberg@arm.com exit(1); 28612037Sandreas.sandberg@arm.com 28712037Sandreas.sandberg@arm.com case 'E': 28812037Sandreas.sandberg@arm.com option = getOptionString(i, argc, argv); 28912037Sandreas.sandberg@arm.com if (!split_first(option, var, val, '=')) 29011986Sandreas.sandberg@arm.com val = "True"; 29112391Sjason@lowepower.com 29212391Sjason@lowepower.com if (setenv(var.c_str(), val.c_str(), true) == -1) 29312391Sjason@lowepower.com panic("setenv: %s\n", strerror(errno)); 29412391Sjason@lowepower.com break; 29512391Sjason@lowepower.com 29612391Sjason@lowepower.com case 'I': 29712391Sjason@lowepower.com option = getOptionString(i, argc, argv); 29812391Sjason@lowepower.com pyconfig.addPath(option); 29912391Sjason@lowepower.com break; 30012037Sandreas.sandberg@arm.com 30112037Sandreas.sandberg@arm.com case 'P': 30212037Sandreas.sandberg@arm.com option = getOptionString(i, argc, argv); 30312037Sandreas.sandberg@arm.com pyconfig.writeLine(option); 30412391Sjason@lowepower.com break; 30512391Sjason@lowepower.com 30612391Sjason@lowepower.com case 'X': { 30712391Sjason@lowepower.com list<EmbedFile> lst; 30812391Sjason@lowepower.com EmbedMap::all(lst); 30912391Sjason@lowepower.com list<EmbedFile>::iterator i = lst.begin(); 31012391Sjason@lowepower.com list<EmbedFile>::iterator end = lst.end(); 31112391Sjason@lowepower.com 31212391Sjason@lowepower.com while (i != end) { 31312391Sjason@lowepower.com cprintf("Embedded File: %s\n", i->name); 31412391Sjason@lowepower.com cout.write(i->data, i->length); 31512391Sjason@lowepower.com ++i; 31612391Sjason@lowepower.com } 31712391Sjason@lowepower.com 318 return 0; 319 } 320 321 default: 322 showBriefHelp(cerr); 323 panic("invalid argument '%s'\n", arg_str); 324 } 325 } else { 326 string file(arg_str); 327 string base, ext; 328 329 if (!split_last(file, base, ext, '.') || 330 ext != "py" && ext != "mpy") 331 panic("Config file '%s' must end in '.py' or '.mpy'\n", file); 332 333 pyconfig.load(file); 334 configfile_found = true; 335 } 336 } 337 338 if (outdir.empty()) { 339 char *env = getenv("OUTPUT_DIR"); 340 outdir = env ? env : "."; 341 } 342 343 simout.setDirectory(outdir); 344 345 char *env = getenv("CONFIG_OUTPUT"); 346 if (!env) 347 env = "config.out"; 348 configStream = simout.find(env); 349 350 if (!configfile_found) 351 panic("no configuration file specified!"); 352 353 // The configuration database is now complete; start processing it. 354 IniFile inifile; 355 if (!pyconfig.output(inifile)) 356 panic("Error processing python code"); 357 358 // Initialize statistics database 359 Stats::InitSimStats(); 360 361 // Now process the configuration hierarchy and create the SimObjects. 362 ConfigHierarchy configHierarchy(inifile); 363 configHierarchy.build(); 364 configHierarchy.createSimObjects(); 365 366 // Parse and check all non-config-hierarchy parameters. 367 ParamContext::parseAllContexts(inifile); 368 ParamContext::checkAllContexts(); 369 370 // Print hello message to stats file if it's actually a file. If 371 // it's not (i.e. it's cout or cerr) then we already did it above. 372 if (simout.isFile(*outputStream)) 373 sayHello(*outputStream); 374 375 // Echo command line and all parameter settings to stats file as well. 376 echoCommandLine(argc, argv, *outputStream); 377 ParamContext::showAllContexts(*configStream); 378 379 // Do a second pass to finish initializing the sim objects 380 SimObject::initAll(); 381 382 // Restore checkpointed state, if any. 383 configHierarchy.unserializeSimObjects(); 384 385 // Done processing the configuration database. 386 // Check for unreferenced entries. 387 if (inifile.printUnreferenced()) 388 panic("unreferenced sections/entries in the intermediate ini file"); 389 390 SimObject::regAllStats(); 391 392 // uncomment the following to get PC-based execution-time profile 393#ifdef DO_PROFILE 394 init_profile((char *)&_init, (char *)&_fini); 395#endif 396 397 // Check to make sure that the stats package is properly initialized 398 Stats::check(); 399 400 // Reset to put the stats in a consistent state. 401 Stats::reset(); 402 403 // Nothing to simulate if we don't have at least one CPU somewhere. 404 if (BaseCPU::numSimulatedCPUs() == 0) { 405 cerr << "Fatal: no CPUs to simulate." << endl; 406 exit(1); 407 } 408 409 warn("Entering event queue. Starting simulation...\n"); 410 SimStartup(); 411 while (!mainEventQueue.empty()) { 412 assert(curTick <= mainEventQueue.nextTick() && 413 "event scheduled in the past"); 414 415 // forward current cycle to the time of the first event on the 416 // queue 417 curTick = mainEventQueue.nextTick(); 418 mainEventQueue.serviceOne(); 419 420 if (async_event) { 421 async_event = false; 422 if (async_dump) { 423 async_dump = false; 424 425 using namespace Stats; 426 SetupEvent(Dump, curTick); 427 } 428 429 if (async_dumpreset) { 430 async_dumpreset = false; 431 432 using namespace Stats; 433 SetupEvent(Dump | Reset, curTick); 434 } 435 436 if (async_exit) { 437 async_exit = false; 438 new SimExitEvent("User requested STOP"); 439 } 440 441 if (async_io || async_alarm) { 442 async_io = false; 443 async_alarm = false; 444 pollQueue.service(); 445 } 446 } 447 } 448 449 // This should never happen... every conceivable way for the 450 // simulation to terminate (hit max cycles/insts, signal, 451 // simulated system halts/exits) generates an exit event, so we 452 // should never run out of events on the queue. 453 exitNow("no events on event loop! All CPUs must be idle.", 1); 454 455 return 0; 456} 457