main.cc revision 2665
1/* 2 * Copyright (c) 2000-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Steve Raasch 29 * Nathan Binkert 30 * Steve Reinhardt 31 */ 32 33/// 34/// @file sim/main.cc 35/// 36#include <Python.h> // must be before system headers... see Python docs 37 38#include <sys/types.h> 39#include <sys/stat.h> 40#include <errno.h> 41#include <libgen.h> 42#include <stdlib.h> 43#include <signal.h> 44 45#include <list> 46#include <string> 47#include <vector> 48 49#include "base/inifile.hh" 50#include "base/misc.hh" 51#include "base/output.hh" 52#include "base/pollevent.hh" 53#include "base/statistics.hh" 54#include "base/str.hh" 55#include "base/time.hh" 56#include "cpu/base.hh" 57#include "cpu/smt.hh" 58#include "sim/async.hh" 59#include "sim/builder.hh" 60#include "sim/configfile.hh" 61#include "sim/host.hh" 62#include "sim/sim_events.hh" 63#include "sim/sim_exit.hh" 64#include "sim/sim_object.hh" 65#include "sim/stat_control.hh" 66#include "sim/stats.hh" 67#include "sim/root.hh" 68 69using namespace std; 70 71// See async.h. 72volatile bool async_event = false; 73volatile bool async_dump = false; 74volatile bool async_dumpreset = false; 75volatile bool async_exit = false; 76volatile bool async_io = false; 77volatile bool async_alarm = false; 78 79/// Stats signal handler. 80void 81dumpStatsHandler(int sigtype) 82{ 83 async_event = true; 84 async_dump = true; 85} 86 87void 88dumprstStatsHandler(int sigtype) 89{ 90 async_event = true; 91 async_dumpreset = true; 92} 93 94/// Exit signal handler. 95void 96exitNowHandler(int sigtype) 97{ 98 async_event = true; 99 async_exit = true; 100} 101 102/// Abort signal handler. 103void 104abortHandler(int sigtype) 105{ 106 cerr << "Program aborted at cycle " << curTick << endl; 107 108#if TRACING_ON 109 // dump trace buffer, if there is one 110 Trace::theLog.dump(cerr); 111#endif 112} 113 114/// Simulator executable name 115char *myProgName = ""; 116 117/// 118/// Echo the command line for posterity in such a way that it can be 119/// used to rerun the same simulation (given the same .ini files). 120/// 121void 122echoCommandLine(int argc, char **argv, ostream &out) 123{ 124 out << "command line: " << argv[0]; 125 for (int i = 1; i < argc; i++) { 126 string arg(argv[i]); 127 128 out << ' '; 129 130 // If the arg contains spaces, we need to quote it. 131 // The rest of this is overkill to make it look purty. 132 133 // print dashes first outside quotes 134 int non_dash_pos = arg.find_first_not_of("-"); 135 out << arg.substr(0, non_dash_pos); // print dashes 136 string body = arg.substr(non_dash_pos); // the rest 137 138 // if it's an assignment, handle the lhs & rhs separately 139 int eq_pos = body.find("="); 140 if (eq_pos == string::npos) { 141 out << quote(body); 142 } 143 else { 144 string lhs(body.substr(0, eq_pos)); 145 string rhs(body.substr(eq_pos + 1)); 146 147 out << quote(lhs) << "=" << quote(rhs); 148 } 149 } 150 out << endl << endl; 151} 152 153int 154main(int argc, char **argv) 155{ 156 // Save off program name 157 myProgName = argv[0]; 158 159 signal(SIGFPE, SIG_IGN); // may occur on misspeculated paths 160 signal(SIGTRAP, SIG_IGN); 161 signal(SIGUSR1, dumpStatsHandler); // dump intermediate stats 162 signal(SIGUSR2, dumprstStatsHandler); // dump and reset stats 163 signal(SIGINT, exitNowHandler); // dump final stats and exit 164 signal(SIGABRT, abortHandler); 165 166 // Python embedded interpreter invocation 167 Py_SetProgramName(argv[0]); 168 const char *fileName = Py_GetProgramFullPath(); 169 Py_Initialize(); 170 PySys_SetArgv(argc, argv); 171 172 // loadSwigModules(); 173 174 // Set Python module path to include current file to find embedded 175 // zip archive 176 if (PyRun_SimpleString("import sys") != 0) 177 panic("Python error importing 'sys' module\n"); 178 string pathCmd = csprintf("sys.path[1:1] = ['%s']", fileName); 179 if (PyRun_SimpleString(pathCmd.c_str()) != 0) 180 panic("Python error setting sys.path\n"); 181 182 // Pass compile timestamp string to Python 183 extern const char *compileDate; // from date.cc 184 string setCompileDate = csprintf("compileDate = '%s'", compileDate); 185 if (PyRun_SimpleString(setCompileDate.c_str()) != 0) 186 panic("Python error setting compileDate\n"); 187 188 // PyRun_InteractiveLoop(stdin, "stdin"); 189 // m5/__init__.py currently contains main argv parsing loop etc., 190 // and will write out config.ini file before returning. 191 if (PyImport_ImportModule("defines") == NULL) 192 panic("Python error importing 'defines.py'\n"); 193 if (PyImport_ImportModule("m5") == NULL) 194 panic("Python error importing 'm5' module\n"); 195 Py_Finalize(); 196 197 configStream = simout.find("config.out"); 198 199 // The configuration database is now complete; start processing it. 200 IniFile inifile; 201 inifile.load("config.ini"); 202 203 // Initialize statistics database 204 Stats::InitSimStats(); 205 206 // Now process the configuration hierarchy and create the SimObjects. 207 ConfigHierarchy configHierarchy(inifile); 208 configHierarchy.build(); 209 configHierarchy.createSimObjects(); 210 211 // Parse and check all non-config-hierarchy parameters. 212 ParamContext::parseAllContexts(inifile); 213 ParamContext::checkAllContexts(); 214 215 // Echo command line and all parameter settings to stats file as well. 216 echoCommandLine(argc, argv, *outputStream); 217 ParamContext::showAllContexts(*configStream); 218 219 // Any objects that can't connect themselves until after construction should 220 // do so now 221 SimObject::connectAll(); 222 223 // Do a second pass to finish initializing the sim objects 224 SimObject::initAll(); 225 226 // Restore checkpointed state, if any. 227 configHierarchy.unserializeSimObjects(); 228 229 // Done processing the configuration database. 230 // Check for unreferenced entries. 231 if (inifile.printUnreferenced()) 232 panic("unreferenced sections/entries in the intermediate ini file"); 233 234 SimObject::regAllStats(); 235 236 // uncomment the following to get PC-based execution-time profile 237#ifdef DO_PROFILE 238 init_profile((char *)&_init, (char *)&_fini); 239#endif 240 241 // Check to make sure that the stats package is properly initialized 242 Stats::check(); 243 244 // Reset to put the stats in a consistent state. 245 Stats::reset(); 246 247 warn("Entering event queue. Starting simulation...\n"); 248 SimStartup(); 249 while (!mainEventQueue.empty()) { 250 assert(curTick <= mainEventQueue.nextTick() && 251 "event scheduled in the past"); 252 253 // forward current cycle to the time of the first event on the 254 // queue 255 curTick = mainEventQueue.nextTick(); 256 mainEventQueue.serviceOne(); 257 258 if (async_event) { 259 async_event = false; 260 if (async_dump) { 261 async_dump = false; 262 263 using namespace Stats; 264 SetupEvent(Dump, curTick); 265 } 266 267 if (async_dumpreset) { 268 async_dumpreset = false; 269 270 using namespace Stats; 271 SetupEvent(Dump | Reset, curTick); 272 } 273 274 if (async_exit) { 275 async_exit = false; 276 new SimExitEvent("User requested STOP"); 277 } 278 279 if (async_io || async_alarm) { 280 async_io = false; 281 async_alarm = false; 282 pollQueue.service(); 283 } 284 } 285 } 286 287 // This should never happen... every conceivable way for the 288 // simulation to terminate (hit max cycles/insts, signal, 289 // simulated system halts/exits) generates an exit event, so we 290 // should never run out of events on the queue. 291 exitNow("no events on event loop! All CPUs must be idle.", 1); 292 293 return 0; 294} 295