main.cc revision 2655 
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
29///
30/// @file sim/main.cc
31///
32#include <Python.h>	// must be before system headers... see Python docs
33
34#include <sys/types.h>
35#include <sys/stat.h>
36#include <errno.h>
37#include <libgen.h>
38#include <stdlib.h>
39#include <signal.h>
40
41#include <list>
42#include <string>
43#include <vector>
44
45#include "base/inifile.hh"
46#include "base/misc.hh"
47#include "base/output.hh"
48#include "base/pollevent.hh"
49#include "base/statistics.hh"
50#include "base/str.hh"
51#include "base/time.hh"
52#include "cpu/base.hh"
53#include "cpu/smt.hh"
54#include "sim/async.hh"
55#include "sim/builder.hh"
56#include "sim/configfile.hh"
57#include "sim/host.hh"
58#include "sim/sim_events.hh"
59#include "sim/sim_exit.hh"
60#include "sim/sim_object.hh"
61#include "sim/stat_control.hh"
62#include "sim/stats.hh"
63#include "sim/root.hh"
64
65using namespace std;
66
67// See async.h.
68volatile bool async_event = false;
69volatile bool async_dump = false;
70volatile bool async_dumpreset = false;
71volatile bool async_exit = false;
72volatile bool async_io = false;
73volatile bool async_alarm = false;
74
75/// Stats signal handler.
76void
77dumpStatsHandler(int sigtype)
78{
79    async_event = true;
80    async_dump = true;
81}
82
83void
84dumprstStatsHandler(int sigtype)
85{
86    async_event = true;
87    async_dumpreset = true;
88}
89
90/// Exit signal handler.
91void
92exitNowHandler(int sigtype)
93{
94    async_event = true;
95    async_exit = true;
96}
97
98/// Abort signal handler.
99void
100abortHandler(int sigtype)
101{
102    cerr << "Program aborted at cycle " << curTick << endl;
103
104#if TRACING_ON
105    // dump trace buffer, if there is one
106    Trace::theLog.dump(cerr);
107#endif
108}
109
110/// Simulator executable name
111char *myProgName = "";
112
113///
114/// Echo the command line for posterity in such a way that it can be
115/// used to rerun the same simulation (given the same .ini files).
116///
117void
118echoCommandLine(int argc, char **argv, ostream &out)
119{
120    out << "command line: " << argv[0];
121    for (int i = 1; i < argc; i++) {
122        string arg(argv[i]);
123
124        out << ' ';
125
126        // If the arg contains spaces, we need to quote it.
127        // The rest of this is overkill to make it look purty.
128
129        // print dashes first outside quotes
130        int non_dash_pos = arg.find_first_not_of("-");
131        out << arg.substr(0, non_dash_pos);	// print dashes
132        string body = arg.substr(non_dash_pos);	// the rest
133
134        // if it's an assignment, handle the lhs & rhs separately
135        int eq_pos = body.find("=");
136        if (eq_pos == string::npos) {
137            out << quote(body);
138        }
139        else {
140            string lhs(body.substr(0, eq_pos));
141            string rhs(body.substr(eq_pos + 1));
142
143            out << quote(lhs) << "=" << quote(rhs);
144        }
145    }
146    out << endl << endl;
147}
148
149#include "config/python_build_env.hh"
150
151int
152main(int argc, char **argv)
153{
154    // Save off program name
155    myProgName = argv[0];
156
157    signal(SIGFPE, SIG_IGN);		// may occur on misspeculated paths
158    signal(SIGTRAP, SIG_IGN);
159    signal(SIGUSR1, dumpStatsHandler);		// dump intermediate stats
160    signal(SIGUSR2, dumprstStatsHandler);	// dump and reset stats
161    signal(SIGINT, exitNowHandler);		// dump final stats and exit
162    signal(SIGABRT, abortHandler);
163
164    // Python embedded interpreter invocation
165    Py_SetProgramName(argv[0]);
166    const char *fileName = Py_GetProgramFullPath();
167    Py_Initialize();
168    PySys_SetArgv(argc, argv);
169
170    // loadSwigModules();
171
172    // Set Python module path to include current file to find embedded
173    // zip archive
174    PyRun_SimpleString("import sys");
175    string pathCmd = csprintf("sys.path[1:1] = ['%s']", fileName);
176    PyRun_SimpleString(pathCmd.c_str());
177
178    // Pass compile timestamp string to Python
179    extern const char *compileDate;	// from date.cc
180    string setCompileDate = csprintf("compileDate = '%s'", compileDate);
181    PyRun_SimpleString(setCompileDate.c_str());
182
183    // PyRun_InteractiveLoop(stdin, "stdin");
184    // m5/__init__.py currently contains main argv parsing loop etc.,
185    // and will write out config.ini file before returning.
186    PyImport_ImportModule("defines");
187    PyImport_ImportModule("m5");
188    Py_Finalize();
189
190    configStream = simout.find("config.out");
191
192    // The configuration database is now complete; start processing it.
193    IniFile inifile;
194    inifile.load("config.ini");
195
196    // Initialize statistics database
197    Stats::InitSimStats();
198
199    // Now process the configuration hierarchy and create the SimObjects.
200    ConfigHierarchy configHierarchy(inifile);
201    configHierarchy.build();
202    configHierarchy.createSimObjects();
203
204    // Parse and check all non-config-hierarchy parameters.
205    ParamContext::parseAllContexts(inifile);
206    ParamContext::checkAllContexts();
207
208    // Echo command line and all parameter settings to stats file as well.
209    echoCommandLine(argc, argv, *outputStream);
210    ParamContext::showAllContexts(*configStream);
211
212    // Any objects that can't connect themselves until after construction should
213    // do so now
214    SimObject::connectAll();
215
216    // Do a second pass to finish initializing the sim objects
217    SimObject::initAll();
218
219    // Restore checkpointed state, if any.
220    configHierarchy.unserializeSimObjects();
221
222    // Done processing the configuration database.
223    // Check for unreferenced entries.
224    if (inifile.printUnreferenced())
225        panic("unreferenced sections/entries in the intermediate ini file");
226
227    SimObject::regAllStats();
228
229    // uncomment the following to get PC-based execution-time profile
230#ifdef DO_PROFILE
231    init_profile((char *)&_init, (char *)&_fini);
232#endif
233
234    // Check to make sure that the stats package is properly initialized
235    Stats::check();
236
237    // Reset to put the stats in a consistent state.
238    Stats::reset();
239
240    warn("Entering event queue.  Starting simulation...\n");
241    SimStartup();
242    while (!mainEventQueue.empty()) {
243        assert(curTick <= mainEventQueue.nextTick() &&
244               "event scheduled in the past");
245
246        // forward current cycle to the time of the first event on the
247        // queue
248        curTick = mainEventQueue.nextTick();
249        mainEventQueue.serviceOne();
250
251        if (async_event) {
252            async_event = false;
253            if (async_dump) {
254                async_dump = false;
255
256                using namespace Stats;
257                SetupEvent(Dump, curTick);
258            }
259
260            if (async_dumpreset) {
261                async_dumpreset = false;
262
263                using namespace Stats;
264                SetupEvent(Dump | Reset, curTick);
265            }
266
267            if (async_exit) {
268                async_exit = false;
269                new SimExitEvent("User requested STOP");
270            }
271
272            if (async_io || async_alarm) {
273                async_io = false;
274                async_alarm = false;
275                pollQueue.service();
276            }
277        }
278    }
279
280    // This should never happen... every conceivable way for the
281    // simulation to terminate (hit max cycles/insts, signal,
282    // simulated system halts/exits) generates an exit event, so we
283    // should never run out of events on the queue.
284    exitNow("no events on event loop!  All CPUs must be idle.", 1);
285
286    return 0;
287}
288