summaryrefslogtreecommitdiff
path: root/src/sim/init.cc
blob: 66eddfb6fa1dc919b930f8051717d14e6224cd10 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/*
 * Copyright (c) 2000-2005 The Regents of The University of Michigan
 * Copyright (c) 2008 The Hewlett-Packard Development Company
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Nathan Binkert
 */

#include <Python.h>
#include <marshal.h>
#include <signal.h>

#include <iostream>
#include <string>
#include <zlib.h>

#include "base/cprintf.hh"
#include "base/misc.hh"
#include "sim/async.hh"
#include "sim/core.hh"
#include "sim/host.hh"
#include "sim/init.hh"

using namespace std;

/// Stats signal handler.
void
dumpStatsHandler(int sigtype)
{
    async_event = true;
    async_statdump = true;
}

void
dumprstStatsHandler(int sigtype)
{
    async_event = true;
    async_statdump = true;
    async_statreset = true;
}

/// Exit signal handler.
void
exitNowHandler(int sigtype)
{
    async_event = true;
    async_exit = true;
}

/// Abort signal handler.
void
abortHandler(int sigtype)
{
    ccprintf(cerr, "Program aborted at cycle %d\n", curTick);
}

/*
 * M5 can do several special things when various signals are sent.
 * None are mandatory.
 */
void
initSignals()
{
    // Floating point exceptions may happen on misspeculated paths, so
    // ignore them
    signal(SIGFPE, SIG_IGN);

    // We use SIGTRAP sometimes for debugging
    signal(SIGTRAP, SIG_IGN);

    // Dump intermediate stats
    signal(SIGUSR1, dumpStatsHandler);

    // Dump intermediate stats and reset them
    signal(SIGUSR2, dumprstStatsHandler);

    // Exit cleanly on Interrupt (Ctrl-C)
    signal(SIGINT, exitNowHandler);

    // Print out cycle number on abort
    signal(SIGABRT, abortHandler);
}

/*
 * Uncompress and unmarshal the code object stored in the
 * EmbeddedPyModule
 */
PyObject *
getCode(const EmbeddedPyModule *pymod)
{
    assert(pymod->zlen == pymod->code_end - pymod->code);
    Bytef *marshalled = new Bytef[pymod->mlen];
    uLongf unzlen = pymod->mlen;
    int ret = uncompress(marshalled, &unzlen, (const Bytef *)pymod->code,
        pymod->zlen);
    if (ret != Z_OK)
        panic("Could not uncompress code: %s\n", zError(ret));
    assert(unzlen == pymod->mlen);

    return PyMarshal_ReadObjectFromString((char *)marshalled, pymod->mlen);
}

// The python library is totally messed up with respect to constness,
// so make a simple macro to make life a little easier
#define PyCC(x) (const_cast<char *>(x))

/*
 * Load and initialize all of the python parts of M5, including Swig
 * and the embedded module importer.
 */
int
initM5Python()
{
    extern void initSwig();

    // initialize SWIG modules.  initSwig() is autogenerated and calls
    // all of the individual swig initialization functions.
    initSwig();

    // Load the importer module
    PyObject *code = getCode(&embeddedPyImporter);
    PyObject *module = PyImport_ExecCodeModule(PyCC("importer"), code);
    if (!module) {
        PyErr_Print();
        return 1;
    }

    // Load the rest of the embedded python files into the embedded
    // python importer
    const EmbeddedPyModule *pymod = &embeddedPyModules[0];
    while (pymod->filename) {
        PyObject *code = getCode(pymod);
        PyObject *result = PyObject_CallMethod(module, PyCC("add_module"),
            PyCC("ssO"), pymod->filename, pymod->modpath, code);
        if (!result) {
            PyErr_Print();
            return 1;
        }
        Py_DECREF(result);
        ++pymod;
    }

    return 0;
}

/*
 * Start up the M5 simulator.  This mostly vectors into the python
 * main function.
 */
int
m5Main(int argc, char **argv)
{
    PySys_SetArgv(argc, argv);

    // We have to set things up in the special __main__ module
    PyObject *module = PyImport_AddModule(PyCC("__main__"));
    if (module == NULL)
        panic("Could not import __main__");
    PyObject *dict = PyModule_GetDict(module);

    // import the main m5 module
    PyObject *result;
    result = PyRun_String("import m5", Py_file_input, dict, dict);
    if (!result) {
        PyErr_Print();
        return 1;
    }
    Py_DECREF(result);

    // Start m5
    result = PyRun_String("m5.main()", Py_file_input, dict, dict);
    if (!result) {
        PyErr_Print();
        return 1;
    }
    Py_DECREF(result);

    return 0;
}

PyMODINIT_FUNC
initm5(void)
{
    initM5Python();
    PyImport_ImportModule(PyCC("m5"));
}