process.cc revision 2462
112037Sandreas.sandberg@arm.com/* 212037Sandreas.sandberg@arm.com * Copyright (c) 2001-2005 The Regents of The University of Michigan 312037Sandreas.sandberg@arm.com * All rights reserved. 412037Sandreas.sandberg@arm.com * 512037Sandreas.sandberg@arm.com * Redistribution and use in source and binary forms, with or without 612037Sandreas.sandberg@arm.com * modification, are permitted provided that the following conditions are 712037Sandreas.sandberg@arm.com * met: redistributions of source code must retain the above copyright 812037Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer; 912037Sandreas.sandberg@arm.com * redistributions in binary form must reproduce the above copyright 1012037Sandreas.sandberg@arm.com * notice, this list of conditions and the following disclaimer in the 1112037Sandreas.sandberg@arm.com * documentation and/or other materials provided with the distribution; 1212037Sandreas.sandberg@arm.com * neither the name of the copyright holders nor the names of its 1312037Sandreas.sandberg@arm.com * contributors may be used to endorse or promote products derived from 1412037Sandreas.sandberg@arm.com * this software without specific prior written permission. 1512037Sandreas.sandberg@arm.com * 1612037Sandreas.sandberg@arm.com * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712037Sandreas.sandberg@arm.com * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812037Sandreas.sandberg@arm.com * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912037Sandreas.sandberg@arm.com * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012037Sandreas.sandberg@arm.com * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112037Sandreas.sandberg@arm.com * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212037Sandreas.sandberg@arm.com * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312037Sandreas.sandberg@arm.com * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412037Sandreas.sandberg@arm.com * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512037Sandreas.sandberg@arm.com * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612037Sandreas.sandberg@arm.com * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712037Sandreas.sandberg@arm.com */ 2812037Sandreas.sandberg@arm.com 2912037Sandreas.sandberg@arm.com#include <unistd.h> 3012037Sandreas.sandberg@arm.com#include <fcntl.h> 3112037Sandreas.sandberg@arm.com 3212037Sandreas.sandberg@arm.com#include <cstdio> 3312037Sandreas.sandberg@arm.com#include <string> 3412037Sandreas.sandberg@arm.com 3512037Sandreas.sandberg@arm.com#include "base/intmath.hh" 3612037Sandreas.sandberg@arm.com#include "base/loader/object_file.hh" 3712037Sandreas.sandberg@arm.com#include "base/loader/symtab.hh" 3812037Sandreas.sandberg@arm.com#include "base/statistics.hh" 3912037Sandreas.sandberg@arm.com#include "config/full_system.hh" 4012037Sandreas.sandberg@arm.com#include "cpu/exec_context.hh" 4112037Sandreas.sandberg@arm.com#include "mem/page_table.hh" 4212037Sandreas.sandberg@arm.com#include "mem/mem_object.hh" 4312037Sandreas.sandberg@arm.com#include "mem/translating_port.hh" 4412037Sandreas.sandberg@arm.com#include "sim/builder.hh" 4512037Sandreas.sandberg@arm.com#include "sim/process.hh" 4612037Sandreas.sandberg@arm.com#include "sim/stats.hh" 4712037Sandreas.sandberg@arm.com#include "sim/syscall_emul.hh" 4812037Sandreas.sandberg@arm.com#include "sim/system.hh" 4912037Sandreas.sandberg@arm.com 5012037Sandreas.sandberg@arm.com#include "arch/process.hh" 5112037Sandreas.sandberg@arm.com 5212037Sandreas.sandberg@arm.comusing namespace std; 5312037Sandreas.sandberg@arm.comusing namespace TheISA; 5412037Sandreas.sandberg@arm.com 5512037Sandreas.sandberg@arm.com// 5612037Sandreas.sandberg@arm.com// The purpose of this code is to fake the loader & syscall mechanism 5712037Sandreas.sandberg@arm.com// when there's no OS: thus there's no resone to use it in FULL_SYSTEM 5812037Sandreas.sandberg@arm.com// mode when we do have an OS 5912037Sandreas.sandberg@arm.com// 6012037Sandreas.sandberg@arm.com#if FULL_SYSTEM 6112037Sandreas.sandberg@arm.com#error "process.cc not compatible with FULL_SYSTEM" 6212037Sandreas.sandberg@arm.com#endif 6312037Sandreas.sandberg@arm.com 6412037Sandreas.sandberg@arm.com// current number of allocated processes 6512037Sandreas.sandberg@arm.comint num_processes = 0; 6612037Sandreas.sandberg@arm.com 6712037Sandreas.sandberg@arm.comProcess::Process(const string &nm, 6812037Sandreas.sandberg@arm.com System *_system, 6912037Sandreas.sandberg@arm.com int stdin_fd, // initial I/O descriptors 7012037Sandreas.sandberg@arm.com int stdout_fd, 7112037Sandreas.sandberg@arm.com int stderr_fd) 7212037Sandreas.sandberg@arm.com : SimObject(nm), system(_system) 7312037Sandreas.sandberg@arm.com{ 7412037Sandreas.sandberg@arm.com // initialize first 3 fds (stdin, stdout, stderr) 7512037Sandreas.sandberg@arm.com fd_map[STDIN_FILENO] = stdin_fd; 7612037Sandreas.sandberg@arm.com fd_map[STDOUT_FILENO] = stdout_fd; 7712037Sandreas.sandberg@arm.com fd_map[STDERR_FILENO] = stderr_fd; 7812037Sandreas.sandberg@arm.com 7912037Sandreas.sandberg@arm.com // mark remaining fds as free 8012037Sandreas.sandberg@arm.com for (int i = 3; i <= MAX_FD; ++i) { 8112037Sandreas.sandberg@arm.com fd_map[i] = -1; 8212037Sandreas.sandberg@arm.com } 8312037Sandreas.sandberg@arm.com 8412037Sandreas.sandberg@arm.com mmap_start = mmap_end = 0; 8512037Sandreas.sandberg@arm.com nxm_start = nxm_end = 0; 8612037Sandreas.sandberg@arm.com pTable = new PageTable(system); 8712037Sandreas.sandberg@arm.com // other parameters will be initialized when the program is loaded 8812037Sandreas.sandberg@arm.com} 8912037Sandreas.sandberg@arm.com 9012037Sandreas.sandberg@arm.com 9112037Sandreas.sandberg@arm.comvoid 9212037Sandreas.sandberg@arm.comProcess::regStats() 9312037Sandreas.sandberg@arm.com{ 9412037Sandreas.sandberg@arm.com using namespace Stats; 9512037Sandreas.sandberg@arm.com 9612037Sandreas.sandberg@arm.com num_syscalls 9712037Sandreas.sandberg@arm.com .name(name() + ".PROG:num_syscalls") 9812037Sandreas.sandberg@arm.com .desc("Number of system calls") 9912037Sandreas.sandberg@arm.com ; 10012037Sandreas.sandberg@arm.com} 10112037Sandreas.sandberg@arm.com 10212037Sandreas.sandberg@arm.com// 10312037Sandreas.sandberg@arm.com// static helper functions 10412037Sandreas.sandberg@arm.com// 10512037Sandreas.sandberg@arm.comint 10612037Sandreas.sandberg@arm.comProcess::openInputFile(const string &filename) 10712037Sandreas.sandberg@arm.com{ 10812037Sandreas.sandberg@arm.com int fd = open(filename.c_str(), O_RDONLY); 10912037Sandreas.sandberg@arm.com 11012037Sandreas.sandberg@arm.com if (fd == -1) { 11112037Sandreas.sandberg@arm.com perror(NULL); 11212037Sandreas.sandberg@arm.com cerr << "unable to open \"" << filename << "\" for reading\n"; 11312037Sandreas.sandberg@arm.com fatal("can't open input file"); 11412037Sandreas.sandberg@arm.com } 11512037Sandreas.sandberg@arm.com 11612037Sandreas.sandberg@arm.com return fd; 11712037Sandreas.sandberg@arm.com} 11812037Sandreas.sandberg@arm.com 11912037Sandreas.sandberg@arm.com 12012037Sandreas.sandberg@arm.comint 12112037Sandreas.sandberg@arm.comProcess::openOutputFile(const string &filename) 12212037Sandreas.sandberg@arm.com{ 12312037Sandreas.sandberg@arm.com int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774); 12412037Sandreas.sandberg@arm.com 12512037Sandreas.sandberg@arm.com if (fd == -1) { 12612037Sandreas.sandberg@arm.com perror(NULL); 12712037Sandreas.sandberg@arm.com cerr << "unable to open \"" << filename << "\" for writing\n"; 12812037Sandreas.sandberg@arm.com fatal("can't open output file"); 12912037Sandreas.sandberg@arm.com } 13012037Sandreas.sandberg@arm.com 13112037Sandreas.sandberg@arm.com return fd; 13212037Sandreas.sandberg@arm.com} 13312037Sandreas.sandberg@arm.com 13412037Sandreas.sandberg@arm.com 13512037Sandreas.sandberg@arm.comint 13612037Sandreas.sandberg@arm.comProcess::registerExecContext(ExecContext *xc) 13712037Sandreas.sandberg@arm.com{ 13812037Sandreas.sandberg@arm.com // add to list 13912037Sandreas.sandberg@arm.com int myIndex = execContexts.size(); 14012037Sandreas.sandberg@arm.com execContexts.push_back(xc); 14112037Sandreas.sandberg@arm.com 14212037Sandreas.sandberg@arm.com // return CPU number to caller 14312037Sandreas.sandberg@arm.com return myIndex; 14412037Sandreas.sandberg@arm.com} 14512037Sandreas.sandberg@arm.com 14612037Sandreas.sandberg@arm.comvoid 14712037Sandreas.sandberg@arm.comProcess::startup() 14812037Sandreas.sandberg@arm.com{ 14912037Sandreas.sandberg@arm.com if (execContexts.empty()) 15012037Sandreas.sandberg@arm.com fatal("Process %s is not associated with any CPUs!\n", name()); 15112037Sandreas.sandberg@arm.com 15212037Sandreas.sandberg@arm.com // first exec context for this process... initialize & enable 15312037Sandreas.sandberg@arm.com ExecContext *xc = execContexts[0]; 15412037Sandreas.sandberg@arm.com 15512037Sandreas.sandberg@arm.com // mark this context as active so it will start ticking. 15612037Sandreas.sandberg@arm.com xc->activate(0); 15712037Sandreas.sandberg@arm.com 15812037Sandreas.sandberg@arm.com // Here we are grabbing the memory port of the CPU hosting the 15912037Sandreas.sandberg@arm.com // initial execution context for initialization. In the long run 16012037Sandreas.sandberg@arm.com // this is not what we want, since it means that all 16112037Sandreas.sandberg@arm.com // initialization accesses (e.g., loading object file sections) 16212037Sandreas.sandberg@arm.com // will be done a cache block at a time through the CPU's cache. 16312037Sandreas.sandberg@arm.com // We really want something more like: 16412037Sandreas.sandberg@arm.com // 16512037Sandreas.sandberg@arm.com // memport = system->physmem->getPort(); 16612037Sandreas.sandberg@arm.com // myPort.setPeer(memport); 16712037Sandreas.sandberg@arm.com // memport->setPeer(&myPort); 16812037Sandreas.sandberg@arm.com // initVirtMem = new TranslatingPort(myPort, pTable); 16912037Sandreas.sandberg@arm.com // 17012037Sandreas.sandberg@arm.com // but we need our own dummy port "myPort" that doesn't exist. 17112037Sandreas.sandberg@arm.com // In the short term it works just fine though. 17212037Sandreas.sandberg@arm.com initVirtMem = xc->getMemPort(); 17312037Sandreas.sandberg@arm.com} 17412037Sandreas.sandberg@arm.com 17512037Sandreas.sandberg@arm.comvoid 17612037Sandreas.sandberg@arm.comProcess::replaceExecContext(ExecContext *xc, int xcIndex) 17712037Sandreas.sandberg@arm.com{ 17812037Sandreas.sandberg@arm.com if (xcIndex >= execContexts.size()) { 17912037Sandreas.sandberg@arm.com panic("replaceExecContext: bad xcIndex, %d >= %d\n", 18012037Sandreas.sandberg@arm.com xcIndex, execContexts.size()); 18112037Sandreas.sandberg@arm.com } 18212037Sandreas.sandberg@arm.com 18312037Sandreas.sandberg@arm.com execContexts[xcIndex] = xc; 18412037Sandreas.sandberg@arm.com} 18512037Sandreas.sandberg@arm.com 18612037Sandreas.sandberg@arm.com// map simulator fd sim_fd to target fd tgt_fd 18712037Sandreas.sandberg@arm.comvoid 18812037Sandreas.sandberg@arm.comProcess::dup_fd(int sim_fd, int tgt_fd) 18912037Sandreas.sandberg@arm.com{ 19012037Sandreas.sandberg@arm.com if (tgt_fd < 0 || tgt_fd > MAX_FD) 19112037Sandreas.sandberg@arm.com panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd); 19212037Sandreas.sandberg@arm.com 19312037Sandreas.sandberg@arm.com fd_map[tgt_fd] = sim_fd; 19412037Sandreas.sandberg@arm.com} 19512037Sandreas.sandberg@arm.com 19612037Sandreas.sandberg@arm.com 19712037Sandreas.sandberg@arm.com// generate new target fd for sim_fd 19812037Sandreas.sandberg@arm.comint 19912037Sandreas.sandberg@arm.comProcess::alloc_fd(int sim_fd) 20012037Sandreas.sandberg@arm.com{ 20112037Sandreas.sandberg@arm.com // in case open() returns an error, don't allocate a new fd 20212037Sandreas.sandberg@arm.com if (sim_fd == -1) 20312037Sandreas.sandberg@arm.com return -1; 20412037Sandreas.sandberg@arm.com 20512037Sandreas.sandberg@arm.com // find first free target fd 20612037Sandreas.sandberg@arm.com for (int free_fd = 0; free_fd < MAX_FD; ++free_fd) { 20712037Sandreas.sandberg@arm.com if (fd_map[free_fd] == -1) { 20812037Sandreas.sandberg@arm.com fd_map[free_fd] = sim_fd; 20912037Sandreas.sandberg@arm.com return free_fd; 21012037Sandreas.sandberg@arm.com } 21112037Sandreas.sandberg@arm.com } 21212037Sandreas.sandberg@arm.com 21312037Sandreas.sandberg@arm.com panic("Process::alloc_fd: out of file descriptors!"); 21412037Sandreas.sandberg@arm.com} 21512037Sandreas.sandberg@arm.com 21612037Sandreas.sandberg@arm.com 21712037Sandreas.sandberg@arm.com// free target fd (e.g., after close) 21812037Sandreas.sandberg@arm.comvoid 21912037Sandreas.sandberg@arm.comProcess::free_fd(int tgt_fd) 22012037Sandreas.sandberg@arm.com{ 22112037Sandreas.sandberg@arm.com if (fd_map[tgt_fd] == -1) 22212037Sandreas.sandberg@arm.com warn("Process::free_fd: request to free unused fd %d", tgt_fd); 22312037Sandreas.sandberg@arm.com 22412037Sandreas.sandberg@arm.com fd_map[tgt_fd] = -1; 22512037Sandreas.sandberg@arm.com} 22612037Sandreas.sandberg@arm.com 22712037Sandreas.sandberg@arm.com 22812037Sandreas.sandberg@arm.com// look up simulator fd for given target fd 22912037Sandreas.sandberg@arm.comint 23012037Sandreas.sandberg@arm.comProcess::sim_fd(int tgt_fd) 23112037Sandreas.sandberg@arm.com{ 23212037Sandreas.sandberg@arm.com if (tgt_fd > MAX_FD) 23312037Sandreas.sandberg@arm.com return -1; 23412037Sandreas.sandberg@arm.com 23512037Sandreas.sandberg@arm.com return fd_map[tgt_fd]; 23612037Sandreas.sandberg@arm.com} 23712037Sandreas.sandberg@arm.com 23812037Sandreas.sandberg@arm.com 23912037Sandreas.sandberg@arm.com 24012037Sandreas.sandberg@arm.com// 24112037Sandreas.sandberg@arm.com// need to declare these here since there is no concrete Process type 24212037Sandreas.sandberg@arm.com// that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call, 24312037Sandreas.sandberg@arm.com// which is where these get declared for concrete types). 244// 245DEFINE_SIM_OBJECT_CLASS_NAME("Process", Process) 246 247 248//////////////////////////////////////////////////////////////////////// 249// 250// LiveProcess member definitions 251// 252//////////////////////////////////////////////////////////////////////// 253 254 255static void 256copyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr, 257 TranslatingPort* memPort) 258{ 259 Addr data_ptr_swap; 260 for (int i = 0; i < strings.size(); ++i) { 261 data_ptr_swap = htog(data_ptr); 262 memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr_swap, sizeof(Addr)); 263 memPort->writeString(data_ptr, strings[i].c_str()); 264 array_ptr += sizeof(Addr); 265 data_ptr += strings[i].size() + 1; 266 } 267 // add NULL terminator 268 data_ptr = 0; 269 270 memPort->writeBlob(array_ptr, (uint8_t*)&data_ptr, sizeof(Addr)); 271} 272 273LiveProcess::LiveProcess(const string &nm, ObjectFile *_objFile, 274 System *_system, 275 int stdin_fd, int stdout_fd, int stderr_fd, 276 vector<string> &_argv, vector<string> &_envp) 277 : Process(nm, _system, stdin_fd, stdout_fd, stderr_fd), 278 objFile(_objFile), argv(_argv), envp(_envp) 279{ 280 prog_fname = argv[0]; 281 282 brk_point = objFile->dataBase() + objFile->dataSize() + objFile->bssSize(); 283 brk_point = roundUp(brk_point, VMPageSize); 284 285 // Set up stack. On Alpha, stack goes below text section. This 286 // code should get moved to some architecture-specific spot. 287 stack_base = objFile->textBase() - (409600+4096); 288 289 // Set up region for mmaps. Tru64 seems to start just above 0 and 290 // grow up from there. 291 mmap_start = mmap_end = 0x10000; 292 293 // Set pointer for next thread stack. Reserve 8M for main stack. 294 next_thread_stack_base = stack_base - (8 * 1024 * 1024); 295 296 // load up symbols, if any... these may be used for debugging or 297 // profiling. 298 if (!debugSymbolTable) { 299 debugSymbolTable = new SymbolTable(); 300 if (!objFile->loadGlobalSymbols(debugSymbolTable) || 301 !objFile->loadLocalSymbols(debugSymbolTable)) { 302 // didn't load any symbols 303 delete debugSymbolTable; 304 debugSymbolTable = NULL; 305 } 306 } 307} 308 309void 310LiveProcess::startup() 311{ 312 Process::startup(); 313 314 // load object file into target memory 315 objFile->loadSections(initVirtMem); 316 317 // Calculate how much space we need for arg & env arrays. 318 int argv_array_size = sizeof(Addr) * (argv.size() + 1); 319 int envp_array_size = sizeof(Addr) * (envp.size() + 1); 320 int arg_data_size = 0; 321 for (int i = 0; i < argv.size(); ++i) { 322 arg_data_size += argv[i].size() + 1; 323 } 324 int env_data_size = 0; 325 for (int i = 0; i < envp.size(); ++i) { 326 env_data_size += envp[i].size() + 1; 327 } 328 329 int space_needed = 330 argv_array_size + envp_array_size + arg_data_size + env_data_size; 331 // for SimpleScalar compatibility 332 if (space_needed < 16384) 333 space_needed = 16384; 334 335 // set bottom of stack 336 stack_min = stack_base - space_needed; 337 // align it 338 stack_min &= ~7; 339 stack_size = stack_base - stack_min; 340 // map memory 341 pTable->allocate(roundDown(stack_min, VMPageSize), 342 roundUp(stack_size, VMPageSize)); 343 344 // map out initial stack contents 345 Addr argv_array_base = stack_min + sizeof(uint64_t); // room for argc 346 Addr envp_array_base = argv_array_base + argv_array_size; 347 Addr arg_data_base = envp_array_base + envp_array_size; 348 Addr env_data_base = arg_data_base + arg_data_size; 349 350 // write contents to stack 351 uint64_t argc = argv.size(); 352 argc = htog(argc); 353 initVirtMem->writeBlob(stack_min, (uint8_t*)&argc, sizeof(uint64_t)); 354 355 copyStringArray(argv, argv_array_base, arg_data_base, initVirtMem); 356 copyStringArray(envp, envp_array_base, env_data_base, initVirtMem); 357 358 execContexts[0]->setIntReg(ArgumentReg0, argc); 359 execContexts[0]->setIntReg(ArgumentReg1, argv_array_base); 360 execContexts[0]->setIntReg(StackPointerReg, stack_min); 361 execContexts[0]->setIntReg(GlobalPointerReg, objFile->globalPointer()); 362 363 Addr prog_entry = objFile->entryPoint(); 364 execContexts[0]->setPC(prog_entry); 365 execContexts[0]->setNextPC(prog_entry + sizeof(MachInst)); 366 367 num_processes++; 368} 369 370void 371LiveProcess::syscall(ExecContext *xc) 372{ 373 num_syscalls++; 374 375 int64_t callnum = xc->readIntReg(SyscallNumReg); 376 377 SyscallDesc *desc = getDesc(callnum); 378 if (desc == NULL) 379 fatal("Syscall %d out of range", callnum); 380 381 desc->doSyscall(callnum, this, xc); 382} 383 384 385LiveProcess * 386LiveProcess::create(const string &nm, System *system, 387 int stdin_fd, int stdout_fd, int stderr_fd, 388 string executable, 389 vector<string> &argv, vector<string> &envp) 390{ 391 LiveProcess *process = NULL; 392 ObjectFile *objFile = createObjectFile(executable); 393 if (objFile == NULL) { 394 fatal("Can't load object file %s", executable); 395 } 396 397 // set up syscall emulation pointer for the current ISA 398 process = createProcess(nm, objFile, system, 399 stdin_fd, stdout_fd, stderr_fd, 400 argv, envp); 401 402 if (process == NULL) 403 fatal("Unknown error creating process object."); 404 405 return process; 406} 407 408 409 410BEGIN_DECLARE_SIM_OBJECT_PARAMS(LiveProcess) 411 412 VectorParam<string> cmd; 413 Param<string> executable; 414 Param<string> input; 415 Param<string> output; 416 VectorParam<string> env; 417 SimObjectParam<System *> system; 418 419END_DECLARE_SIM_OBJECT_PARAMS(LiveProcess) 420 421 422BEGIN_INIT_SIM_OBJECT_PARAMS(LiveProcess) 423 424 INIT_PARAM(cmd, "command line (executable plus arguments)"), 425 INIT_PARAM(executable, "executable (overrides cmd[0] if set)"), 426 INIT_PARAM(input, "filename for stdin (dflt: use sim stdin)"), 427 INIT_PARAM(output, "filename for stdout/stderr (dflt: use sim stdout)"), 428 INIT_PARAM(env, "environment settings"), 429 INIT_PARAM(system, "system") 430 431END_INIT_SIM_OBJECT_PARAMS(LiveProcess) 432 433 434CREATE_SIM_OBJECT(LiveProcess) 435{ 436 string in = input; 437 string out = output; 438 439 // initialize file descriptors to default: same as simulator 440 int stdin_fd, stdout_fd, stderr_fd; 441 442 if (in == "stdin" || in == "cin") 443 stdin_fd = STDIN_FILENO; 444 else 445 stdin_fd = Process::openInputFile(input); 446 447 if (out == "stdout" || out == "cout") 448 stdout_fd = STDOUT_FILENO; 449 else if (out == "stderr" || out == "cerr") 450 stdout_fd = STDERR_FILENO; 451 else 452 stdout_fd = Process::openOutputFile(out); 453 454 stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO; 455 456 return LiveProcess::create(getInstanceName(), system, 457 stdin_fd, stdout_fd, stderr_fd, 458 (string)executable == "" ? cmd[0] : executable, 459 cmd, env); 460} 461 462REGISTER_SIM_OBJECT("LiveProcess", LiveProcess) 463