init.cc revision 11988:665cd5f8b52b
1/* 2 * Copyright (c) 2012, 2017 ARM Limited 3 * All rights reserved 4 * 5 * The license below extends only to copyright in the software and shall 6 * not be construed as granting a license to any other intellectual 7 * property including but not limited to intellectual property relating 8 * to a hardware implementation of the functionality of the software 9 * licensed hereunder. You may use the software subject to the license 10 * terms below provided that you ensure that this notice is replicated 11 * unmodified and in its entirety in all distributions of the software, 12 * modified or unmodified, in source code or in binary form. 13 * 14 * Copyright (c) 2000-2005 The Regents of The University of Michigan 15 * Copyright (c) 2008 The Hewlett-Packard Development Company 16 * All rights reserved. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions are 20 * met: redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer; 22 * redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution; 25 * neither the name of the copyright holders nor the names of its 26 * contributors may be used to endorse or promote products derived from 27 * this software without specific prior written permission. 28 * 29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 30 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 31 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 32 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 33 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 34 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 35 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 36 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 37 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 38 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 39 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 40 * 41 * Authors: Nathan Binkert 42 */ 43 44#include <Python.h> 45 46#include "sim/init.hh" 47 48#include <marshal.h> 49#include <zlib.h> 50 51#include <iostream> 52#include <list> 53#include <string> 54 55#include "base/cprintf.hh" 56#include "base/misc.hh" 57#include "base/types.hh" 58#include "config/have_protobuf.hh" 59#include "python/pybind11/pybind.hh" 60#include "sim/async.hh" 61#include "sim/core.hh" 62 63#if HAVE_PROTOBUF 64#include <google/protobuf/stubs/common.h> 65 66#endif 67 68using namespace std; 69namespace py = pybind11; 70 71// The python library is totally messed up with respect to constness, 72// so make a simple macro to make life a little easier 73#define PyCC(x) (const_cast<char *>(x)) 74 75EmbeddedPython *EmbeddedPython::importer = NULL; 76PyObject *EmbeddedPython::importerModule = NULL; 77EmbeddedPython::EmbeddedPython(const char *filename, const char *abspath, 78 const char *modpath, const unsigned char *code, int zlen, int len) 79 : filename(filename), abspath(abspath), modpath(modpath), code(code), 80 zlen(zlen), len(len) 81{ 82 // if we've added the importer keep track of it because we need it 83 // to bootstrap. 84 if (string(modpath) == string("importer")) 85 importer = this; 86 else 87 getList().push_back(this); 88} 89 90list<EmbeddedPython *> & 91EmbeddedPython::getList() 92{ 93 static list<EmbeddedPython *> the_list; 94 return the_list; 95} 96 97/* 98 * Uncompress and unmarshal the code object stored in the 99 * EmbeddedPython 100 */ 101PyObject * 102EmbeddedPython::getCode() const 103{ 104 Bytef marshalled[len]; 105 uLongf unzlen = len; 106 int ret = uncompress(marshalled, &unzlen, (const Bytef *)code, zlen); 107 if (ret != Z_OK) 108 panic("Could not uncompress code: %s\n", zError(ret)); 109 assert(unzlen == (uLongf)len); 110 111 return PyMarshal_ReadObjectFromString((char *)marshalled, len); 112} 113 114bool 115EmbeddedPython::addModule() const 116{ 117 PyObject *code = getCode(); 118 PyObject *result = PyObject_CallMethod(importerModule, PyCC("add_module"), 119 PyCC("sssO"), filename, abspath, modpath, code); 120 if (!result) { 121 PyErr_Print(); 122 return false; 123 } 124 125 Py_DECREF(result); 126 return true; 127} 128 129/* 130 * Load and initialize all of the python parts of M5, including Swig 131 * and the embedded module importer. 132 */ 133int 134EmbeddedPython::initAll() 135{ 136 // Load the importer module 137 PyObject *code = importer->getCode(); 138 importerModule = PyImport_ExecCodeModule(PyCC("importer"), code); 139 if (!importerModule) { 140 PyErr_Print(); 141 return 1; 142 } 143 144 // Load the rest of the embedded python files into the embedded 145 // python importer 146 list<EmbeddedPython *>::iterator i = getList().begin(); 147 list<EmbeddedPython *>::iterator end = getList().end(); 148 for (; i != end; ++i) 149 if (!(*i)->addModule()) 150 return 1; 151 152 return 0; 153} 154 155EmbeddedSwig::EmbeddedSwig(void (*init_func)(), const string& _context) 156 : initFunc(init_func), context(_context) 157{ 158 getList().push_back(this); 159} 160 161list<EmbeddedSwig *> & 162EmbeddedSwig::getList() 163{ 164 static list<EmbeddedSwig *> the_list; 165 return the_list; 166} 167 168void 169EmbeddedSwig::initAll() 170{ 171 char* old_context = _Py_PackageContext; 172 // initialize SWIG modules. initFunc() is autogenerated and calls 173 // all of the individual swig initialization functions. 174 for (auto i : getList()) { 175 // to ensure that the loaded modules are placed in the right 176 // package we have to be a bit unorthodox and directly 177 // manipulate the package context since swig simply calls 178 // Py_InitModule with nothing but the module name of the 179 // wrapper 180 char* cstr = new char[i->context.size() + 1]; 181 strcpy(cstr, i->context.c_str()); 182 _Py_PackageContext = cstr; 183 i->initFunc(); 184 delete[] cstr; 185 } 186 _Py_PackageContext = old_context; 187} 188 189EmbeddedPyBind::EmbeddedPyBind(const char *_name, 190 void (*init_func)(py::module &), 191 const char *_base) 192 : initFunc(init_func), registered(false), name(_name), base(_base) 193{ 194 getMap()[_name] = this; 195} 196 197EmbeddedPyBind::EmbeddedPyBind(const char *_name, 198 void (*init_func)(py::module &)) 199 : initFunc(init_func), registered(false), name(_name), base("") 200{ 201 getMap()[_name] = this; 202} 203 204void 205EmbeddedPyBind::init(py::module &m) 206{ 207 if (!registered) { 208 initFunc(m); 209 registered = true; 210 } else { 211 cprintf("Warning: %s already registered.\n", name); 212 } 213} 214 215bool 216EmbeddedPyBind::depsReady() const 217{ 218 return base.empty() || getMap()[base]->registered; 219} 220 221std::map<std::string, EmbeddedPyBind *> & 222EmbeddedPyBind::getMap() 223{ 224 static std::map<std::string, EmbeddedPyBind *> objs; 225 return objs; 226} 227 228void 229EmbeddedPyBind::initAll() 230{ 231 std::list<EmbeddedPyBind *> pending; 232 233 py::module m_m5 = py::module("_m5"); 234 m_m5.attr("__package__") = py::cast("_m5"); 235 236 pybind_init_core(m_m5); 237 pybind_init_debug(m_m5); 238 239 pybind_init_event(m_m5); 240 pybind_init_pyobject(m_m5); 241 pybind_init_stats(m_m5); 242 243 for (auto &kv : getMap()) { 244 auto &obj = kv.second; 245 if (obj->base.empty()) { 246 obj->init(m_m5); 247 } else { 248 pending.push_back(obj); 249 } 250 } 251 252 while (!pending.empty()) { 253 for (auto it = pending.begin(); it != pending.end(); ) { 254 EmbeddedPyBind &obj = **it; 255 if (obj.depsReady()) { 256 obj.init(m_m5); 257 it = pending.erase(it); 258 } else { 259 ++it; 260 } 261 } 262 } 263} 264 265int 266initM5Python() 267{ 268 EmbeddedSwig::initAll(); 269 EmbeddedPyBind::initAll(); 270 return EmbeddedPython::initAll(); 271} 272 273/* 274 * Make the commands array weak so that they can be overridden (used 275 * by unit tests to specify a different python main function. 276 */ 277const char * __attribute__((weak)) m5MainCommands[] = { 278 "import m5", 279 "m5.main()", 280 0 // sentinel is required 281}; 282 283/* 284 * Start up the M5 simulator. This mostly vectors into the python 285 * main function. 286 */ 287int 288m5Main(int argc, char **argv) 289{ 290#if HAVE_PROTOBUF 291 // Verify that the version of the protobuf library that we linked 292 // against is compatible with the version of the headers we 293 // compiled against. 294 GOOGLE_PROTOBUF_VERIFY_VERSION; 295#endif 296 297 PySys_SetArgv(argc, argv); 298 299 // We have to set things up in the special __main__ module 300 PyObject *module = PyImport_AddModule(PyCC("__main__")); 301 if (module == NULL) 302 panic("Could not import __main__"); 303 PyObject *dict = PyModule_GetDict(module); 304 305 // import the main m5 module 306 PyObject *result; 307 const char **command = m5MainCommands; 308 309 // evaluate each command in the m5MainCommands array (basically a 310 // bunch of python statements. 311 while (*command) { 312 result = PyRun_String(*command, Py_file_input, dict, dict); 313 if (!result) { 314 PyErr_Print(); 315 return 1; 316 } 317 Py_DECREF(result); 318 319 command++; 320 } 321 322#if HAVE_PROTOBUF 323 google::protobuf::ShutdownProtobufLibrary(); 324#endif 325 326 return 0; 327} 328 329PyMODINIT_FUNC 330initm5(void) 331{ 332 initM5Python(); 333 PyImport_ImportModule(PyCC("m5")); 334} 335