main.cc revision 2656 
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
149int
150main(int argc, char **argv)
151{
152    // Save off program name
153    myProgName = argv[0];
154
155    signal(SIGFPE, SIG_IGN);		// may occur on misspeculated paths
156    signal(SIGTRAP, SIG_IGN);
157    signal(SIGUSR1, dumpStatsHandler);		// dump intermediate stats
158    signal(SIGUSR2, dumprstStatsHandler);	// dump and reset stats
159    signal(SIGINT, exitNowHandler);		// dump final stats and exit
160    signal(SIGABRT, abortHandler);
161
162    // Python embedded interpreter invocation
163    Py_SetProgramName(argv[0]);
164    const char *fileName = Py_GetProgramFullPath();
165    Py_Initialize();
166    PySys_SetArgv(argc, argv);
167
168    // loadSwigModules();
169
170    // Set Python module path to include current file to find embedded
171    // zip archive
172    if (PyRun_SimpleString("import sys") != 0)
173        panic("Python error importing 'sys' module\n");
174    string pathCmd = csprintf("sys.path[1:1] = ['%s']", fileName);
175    if (PyRun_SimpleString(pathCmd.c_str()) != 0)
176        panic("Python error setting sys.path\n");
177
178    // Pass compile timestamp string to Python
179    extern const char *compileDate;	// from date.cc
180    string setCompileDate = csprintf("compileDate = '%s'", compileDate);
181    if (PyRun_SimpleString(setCompileDate.c_str()) != 0)
182        panic("Python error setting compileDate\n");
183
184    // PyRun_InteractiveLoop(stdin, "stdin");
185    // m5/__init__.py currently contains main argv parsing loop etc.,
186    // and will write out config.ini file before returning.
187    if (PyImport_ImportModule("defines") == NULL)
188        panic("Python error importing 'defines.py'\n");
189    if (PyImport_ImportModule("m5") == NULL)
190        panic("Python error importing 'm5' module\n");
191    Py_Finalize();
192
193    configStream = simout.find("config.out");
194
195    // The configuration database is now complete; start processing it.
196    IniFile inifile;
197    inifile.load("config.ini");
198
199    // Initialize statistics database
200    Stats::InitSimStats();
201
202    // Now process the configuration hierarchy and create the SimObjects.
203    ConfigHierarchy configHierarchy(inifile);
204    configHierarchy.build();
205    configHierarchy.createSimObjects();
206
207    // Parse and check all non-config-hierarchy parameters.
208    ParamContext::parseAllContexts(inifile);
209    ParamContext::checkAllContexts();
210
211    // Echo command line and all parameter settings to stats file as well.
212    echoCommandLine(argc, argv, *outputStream);
213    ParamContext::showAllContexts(*configStream);
214
215    // Any objects that can't connect themselves until after construction should
216    // do so now
217    SimObject::connectAll();
218
219    // Do a second pass to finish initializing the sim objects
220    SimObject::initAll();
221
222    // Restore checkpointed state, if any.
223    configHierarchy.unserializeSimObjects();
224
225    // Done processing the configuration database.
226    // Check for unreferenced entries.
227    if (inifile.printUnreferenced())
228        panic("unreferenced sections/entries in the intermediate ini file");
229
230    SimObject::regAllStats();
231
232    // uncomment the following to get PC-based execution-time profile
233#ifdef DO_PROFILE
234    init_profile((char *)&_init, (char *)&_fini);
235#endif
236
237    // Check to make sure that the stats package is properly initialized
238    Stats::check();
239
240    // Reset to put the stats in a consistent state.
241    Stats::reset();
242
243    warn("Entering event queue.  Starting simulation...\n");
244    SimStartup();
245    while (!mainEventQueue.empty()) {
246        assert(curTick <= mainEventQueue.nextTick() &&
247               "event scheduled in the past");
248
249        // forward current cycle to the time of the first event on the
250        // queue
251        curTick = mainEventQueue.nextTick();
252        mainEventQueue.serviceOne();
253
254        if (async_event) {
255            async_event = false;
256            if (async_dump) {
257                async_dump = false;
258
259                using namespace Stats;
260                SetupEvent(Dump, curTick);
261            }
262
263            if (async_dumpreset) {
264                async_dumpreset = false;
265
266                using namespace Stats;
267                SetupEvent(Dump | Reset, curTick);
268            }
269
270            if (async_exit) {
271                async_exit = false;
272                new SimExitEvent("User requested STOP");
273            }
274
275            if (async_io || async_alarm) {
276                async_io = false;
277                async_alarm = false;
278                pollQueue.service();
279            }
280        }
281    }
282
283    // This should never happen... every conceivable way for the
284    // simulation to terminate (hit max cycles/insts, signal,
285    // simulated system halts/exits) generates an exit event, so we
286    // should never run out of events on the queue.
287    exitNow("no events on event loop!  All CPUs must be idle.", 1);
288
289    return 0;
290}
291