process.cc revision 8601
12SN/A/* 21762SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 32SN/A * All rights reserved. 42SN/A * 52SN/A * Redistribution and use in source and binary forms, with or without 62SN/A * modification, are permitted provided that the following conditions are 72SN/A * met: redistributions of source code must retain the above copyright 82SN/A * notice, this list of conditions and the following disclaimer; 92SN/A * redistributions in binary form must reproduce the above copyright 102SN/A * notice, this list of conditions and the following disclaimer in the 112SN/A * documentation and/or other materials provided with the distribution; 122SN/A * neither the name of the copyright holders nor the names of its 132SN/A * contributors may be used to endorse or promote products derived from 142SN/A * this software without specific prior written permission. 152SN/A * 162SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 172SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 182SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 192SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 202SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 212SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 222SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 232SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 242SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 252SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 262SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu * 282665Ssaidi@eecs.umich.edu * Authors: Nathan Binkert 292665Ssaidi@eecs.umich.edu * Steve Reinhardt 302665Ssaidi@eecs.umich.edu * Ali Saidi 312SN/A */ 322SN/A 338229Snate@binkert.org#include <fcntl.h> 342SN/A#include <unistd.h> 356712Snate@binkert.org 366712Snate@binkert.org#include <cstdio> 372SN/A#include <string> 382SN/A 3956SN/A#include "base/loader/object_file.hh" 401158SN/A#include "base/loader/symtab.hh" 418229Snate@binkert.org#include "base/intmath.hh" 42146SN/A#include "base/statistics.hh" 431858SN/A#include "config/full_system.hh" 446658Snate@binkert.org#include "config/the_isa.hh" 452680Sktlim@umich.edu#include "cpu/thread_context.hh" 462378SN/A#include "mem/page_table.hh" 472522SN/A#include "mem/physical.hh" 482401SN/A#include "mem/translating_port.hh" 498229Snate@binkert.org#include "params/LiveProcess.hh" 505154Sgblack@eecs.umich.edu#include "params/Process.hh" 515512SMichael.Adler@intel.com#include "sim/debug.hh" 52360SN/A#include "sim/process.hh" 534434Ssaidi@eecs.umich.edu#include "sim/process_impl.hh" 54695SN/A#include "sim/stats.hh" 552093SN/A#include "sim/syscall_emul.hh" 562378SN/A#include "sim/system.hh" 572SN/A 582715Sstever@eecs.umich.edu#if THE_ISA == ALPHA_ISA 592715Sstever@eecs.umich.edu#include "arch/alpha/linux/process.hh" 602715Sstever@eecs.umich.edu#include "arch/alpha/tru64/process.hh" 612715Sstever@eecs.umich.edu#elif THE_ISA == SPARC_ISA 622715Sstever@eecs.umich.edu#include "arch/sparc/linux/process.hh" 632715Sstever@eecs.umich.edu#include "arch/sparc/solaris/process.hh" 642715Sstever@eecs.umich.edu#elif THE_ISA == MIPS_ISA 652715Sstever@eecs.umich.edu#include "arch/mips/linux/process.hh" 665335Shines@cs.fsu.edu#elif THE_ISA == ARM_ISA 675335Shines@cs.fsu.edu#include "arch/arm/linux/process.hh" 684157Sgblack@eecs.umich.edu#elif THE_ISA == X86_ISA 694166Sgblack@eecs.umich.edu#include "arch/x86/linux/process.hh" 706691Stjones1@inf.ed.ac.uk#elif THE_ISA == POWER_ISA 716691Stjones1@inf.ed.ac.uk#include "arch/power/linux/process.hh" 722715Sstever@eecs.umich.edu#else 732715Sstever@eecs.umich.edu#error "THE_ISA not set" 742715Sstever@eecs.umich.edu#endif 752715Sstever@eecs.umich.edu 762715Sstever@eecs.umich.edu 772SN/Ausing namespace std; 782107SN/Ausing namespace TheISA; 792SN/A 802SN/A// 812SN/A// The purpose of this code is to fake the loader & syscall mechanism 822SN/A// when there's no OS: thus there's no resone to use it in FULL_SYSTEM 832SN/A// mode when we do have an OS 842SN/A// 851858SN/A#if FULL_SYSTEM 86360SN/A#error "process.cc not compatible with FULL_SYSTEM" 872SN/A#endif 882SN/A 892SN/A// current number of allocated processes 902SN/Aint num_processes = 0; 912SN/A 925758Shsul@eecs.umich.edutemplate<class IntType> 935771Shsul@eecs.umich.eduAuxVector<IntType>::AuxVector(IntType type, IntType val) 945758Shsul@eecs.umich.edu{ 955758Shsul@eecs.umich.edu a_type = TheISA::htog(type); 965758Shsul@eecs.umich.edu a_val = TheISA::htog(val); 975758Shsul@eecs.umich.edu} 985758Shsul@eecs.umich.edu 995771Shsul@eecs.umich.edutemplate class AuxVector<uint32_t>; 1005771Shsul@eecs.umich.edutemplate class AuxVector<uint64_t>; 1015758Shsul@eecs.umich.edu 1025154Sgblack@eecs.umich.eduProcess::Process(ProcessParams * params) 1037532Ssteve.reinhardt@amd.com : SimObject(params), system(params->system), 1047532Ssteve.reinhardt@amd.com max_stack_size(params->max_stack_size) 1052SN/A{ 1065154Sgblack@eecs.umich.edu string in = params->input; 1075154Sgblack@eecs.umich.edu string out = params->output; 1085514SMichael.Adler@intel.com string err = params->errout; 1095154Sgblack@eecs.umich.edu 1105154Sgblack@eecs.umich.edu // initialize file descriptors to default: same as simulator 1115154Sgblack@eecs.umich.edu int stdin_fd, stdout_fd, stderr_fd; 1125154Sgblack@eecs.umich.edu 1135154Sgblack@eecs.umich.edu if (in == "stdin" || in == "cin") 1145154Sgblack@eecs.umich.edu stdin_fd = STDIN_FILENO; 1155154Sgblack@eecs.umich.edu else if (in == "None") 1165154Sgblack@eecs.umich.edu stdin_fd = -1; 1175154Sgblack@eecs.umich.edu else 1185154Sgblack@eecs.umich.edu stdin_fd = Process::openInputFile(in); 1195154Sgblack@eecs.umich.edu 1205154Sgblack@eecs.umich.edu if (out == "stdout" || out == "cout") 1215154Sgblack@eecs.umich.edu stdout_fd = STDOUT_FILENO; 1225154Sgblack@eecs.umich.edu else if (out == "stderr" || out == "cerr") 1235154Sgblack@eecs.umich.edu stdout_fd = STDERR_FILENO; 1245154Sgblack@eecs.umich.edu else if (out == "None") 1255154Sgblack@eecs.umich.edu stdout_fd = -1; 1265154Sgblack@eecs.umich.edu else 1275154Sgblack@eecs.umich.edu stdout_fd = Process::openOutputFile(out); 1285154Sgblack@eecs.umich.edu 1295514SMichael.Adler@intel.com if (err == "stdout" || err == "cout") 1305514SMichael.Adler@intel.com stderr_fd = STDOUT_FILENO; 1315514SMichael.Adler@intel.com else if (err == "stderr" || err == "cerr") 1325514SMichael.Adler@intel.com stderr_fd = STDERR_FILENO; 1335514SMichael.Adler@intel.com else if (err == "None") 1345514SMichael.Adler@intel.com stderr_fd = -1; 1355514SMichael.Adler@intel.com else if (err == out) 1365514SMichael.Adler@intel.com stderr_fd = stdout_fd; 1375514SMichael.Adler@intel.com else 1385514SMichael.Adler@intel.com stderr_fd = Process::openOutputFile(err); 1395154Sgblack@eecs.umich.edu 1404997Sgblack@eecs.umich.edu M5_pid = system->allocatePID(); 1412SN/A // initialize first 3 fds (stdin, stdout, stderr) 1425282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[STDIN_FILENO]; 1435282Srstrong@cs.ucsd.edu fdo->fd = stdin_fd; 1445282Srstrong@cs.ucsd.edu fdo->filename = in; 1455282Srstrong@cs.ucsd.edu fdo->flags = O_RDONLY; 1465282Srstrong@cs.ucsd.edu fdo->mode = -1; 1475282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 1485282Srstrong@cs.ucsd.edu 1495282Srstrong@cs.ucsd.edu fdo = &fd_map[STDOUT_FILENO]; 1505282Srstrong@cs.ucsd.edu fdo->fd = stdout_fd; 1515282Srstrong@cs.ucsd.edu fdo->filename = out; 1525282Srstrong@cs.ucsd.edu fdo->flags = O_WRONLY | O_CREAT | O_TRUNC; 1535282Srstrong@cs.ucsd.edu fdo->mode = 0774; 1545282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 1555282Srstrong@cs.ucsd.edu 1565282Srstrong@cs.ucsd.edu fdo = &fd_map[STDERR_FILENO]; 1575282Srstrong@cs.ucsd.edu fdo->fd = stderr_fd; 1585514SMichael.Adler@intel.com fdo->filename = err; 1595282Srstrong@cs.ucsd.edu fdo->flags = O_WRONLY; 1605282Srstrong@cs.ucsd.edu fdo->mode = -1; 1615282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 1625282Srstrong@cs.ucsd.edu 1632SN/A 1642SN/A // mark remaining fds as free 1652SN/A for (int i = 3; i <= MAX_FD; ++i) { 1665282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[i]; 1675282Srstrong@cs.ucsd.edu fdo->fd = -1; 1682SN/A } 1692SN/A 1701450SN/A mmap_start = mmap_end = 0; 1711514SN/A nxm_start = nxm_end = 0; 1728601Ssteve.reinhardt@amd.com pTable = new PageTable(name(), M5_pid); 1732SN/A // other parameters will be initialized when the program is loaded 1742SN/A} 1752SN/A 1762378SN/A 1772SN/Avoid 1782SN/AProcess::regStats() 1792SN/A{ 180729SN/A using namespace Stats; 1812SN/A 1822SN/A num_syscalls 1838240Snate@binkert.org .name(name() + ".num_syscalls") 1842SN/A .desc("Number of system calls") 1852SN/A ; 1862SN/A} 1872SN/A 1882SN/A// 1892SN/A// static helper functions 1902SN/A// 1912SN/Aint 1922SN/AProcess::openInputFile(const string &filename) 1932SN/A{ 1942SN/A int fd = open(filename.c_str(), O_RDONLY); 1952SN/A 1962SN/A if (fd == -1) { 1972SN/A perror(NULL); 1982SN/A cerr << "unable to open \"" << filename << "\" for reading\n"; 1992SN/A fatal("can't open input file"); 2002SN/A } 2012SN/A 2022SN/A return fd; 2032SN/A} 2042SN/A 2052SN/A 2062SN/Aint 2072SN/AProcess::openOutputFile(const string &filename) 2082SN/A{ 2095514SMichael.Adler@intel.com int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0664); 2102SN/A 2112SN/A if (fd == -1) { 2122SN/A perror(NULL); 2132SN/A cerr << "unable to open \"" << filename << "\" for writing\n"; 2142SN/A fatal("can't open output file"); 2152SN/A } 2162SN/A 2172SN/A return fd; 2182SN/A} 2192SN/A 2205713Shsul@eecs.umich.eduThreadContext * 2215713Shsul@eecs.umich.eduProcess::findFreeContext() 2222SN/A{ 2235713Shsul@eecs.umich.edu int size = contextIds.size(); 2245713Shsul@eecs.umich.edu ThreadContext *tc; 2255713Shsul@eecs.umich.edu for (int i = 0; i < size; ++i) { 2265713Shsul@eecs.umich.edu tc = system->getThreadContext(contextIds[i]); 2276029Ssteve.reinhardt@amd.com if (tc->status() == ThreadContext::Halted) { 2285713Shsul@eecs.umich.edu // inactive context, free to use 2295713Shsul@eecs.umich.edu return tc; 2305713Shsul@eecs.umich.edu } 2315512SMichael.Adler@intel.com } 2325713Shsul@eecs.umich.edu return NULL; 2332SN/A} 2342SN/A 2351395SN/Avoid 2367532Ssteve.reinhardt@amd.comProcess::initState() 2371395SN/A{ 2385713Shsul@eecs.umich.edu if (contextIds.empty()) 2395713Shsul@eecs.umich.edu fatal("Process %s is not associated with any HW contexts!\n", name()); 2402378SN/A 2412680Sktlim@umich.edu // first thread context for this process... initialize & enable 2425713Shsul@eecs.umich.edu ThreadContext *tc = system->getThreadContext(contextIds[0]); 2431395SN/A 2441634SN/A // mark this context as active so it will start ticking. 2452680Sktlim@umich.edu tc->activate(0); 2462462SN/A 2472519SN/A Port *mem_port; 2482519SN/A mem_port = system->physmem->getPort("functional"); 2494434Ssaidi@eecs.umich.edu initVirtMem = new TranslatingPort("process init port", this, 2504434Ssaidi@eecs.umich.edu TranslatingPort::Always); 2512519SN/A mem_port->setPeer(initVirtMem); 2522519SN/A initVirtMem->setPeer(mem_port); 2531395SN/A} 2542SN/A 2552SN/A// map simulator fd sim_fd to target fd tgt_fd 2562SN/Avoid 2572SN/AProcess::dup_fd(int sim_fd, int tgt_fd) 2582SN/A{ 2592SN/A if (tgt_fd < 0 || tgt_fd > MAX_FD) 2602SN/A panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd); 2612SN/A 2625282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[tgt_fd]; 2635282Srstrong@cs.ucsd.edu fdo->fd = sim_fd; 2642SN/A} 2652SN/A 2662SN/A 2672SN/A// generate new target fd for sim_fd 2682SN/Aint 2695282Srstrong@cs.ucsd.eduProcess::alloc_fd(int sim_fd, string filename, int flags, int mode, bool pipe) 2702SN/A{ 2712SN/A // in case open() returns an error, don't allocate a new fd 2722SN/A if (sim_fd == -1) 2732SN/A return -1; 2742SN/A 2752SN/A // find first free target fd 2765282Srstrong@cs.ucsd.edu for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) { 2775282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[free_fd]; 2785282Srstrong@cs.ucsd.edu if (fdo->fd == -1) { 2795282Srstrong@cs.ucsd.edu fdo->fd = sim_fd; 2805282Srstrong@cs.ucsd.edu fdo->filename = filename; 2815282Srstrong@cs.ucsd.edu fdo->mode = mode; 2825282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 2835282Srstrong@cs.ucsd.edu fdo->flags = flags; 2845282Srstrong@cs.ucsd.edu fdo->isPipe = pipe; 2855282Srstrong@cs.ucsd.edu fdo->readPipeSource = 0; 2861970SN/A return free_fd; 2871970SN/A } 2882SN/A } 2892SN/A 2901970SN/A panic("Process::alloc_fd: out of file descriptors!"); 2911970SN/A} 2922SN/A 2931970SN/A 2941970SN/A// free target fd (e.g., after close) 2951970SN/Avoid 2961970SN/AProcess::free_fd(int tgt_fd) 2971970SN/A{ 2985282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[tgt_fd]; 2995282Srstrong@cs.ucsd.edu if (fdo->fd == -1) 3001970SN/A warn("Process::free_fd: request to free unused fd %d", tgt_fd); 3011970SN/A 3025282Srstrong@cs.ucsd.edu fdo->fd = -1; 3035282Srstrong@cs.ucsd.edu fdo->filename = "NULL"; 3045282Srstrong@cs.ucsd.edu fdo->mode = 0; 3055282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 3065282Srstrong@cs.ucsd.edu fdo->flags = 0; 3075282Srstrong@cs.ucsd.edu fdo->isPipe = false; 3085282Srstrong@cs.ucsd.edu fdo->readPipeSource = 0; 3092SN/A} 3102SN/A 3112SN/A 3122SN/A// look up simulator fd for given target fd 3132SN/Aint 3142SN/AProcess::sim_fd(int tgt_fd) 3152SN/A{ 3168324Ssteve.reinhardt@amd.com if (tgt_fd < 0 || tgt_fd > MAX_FD) 3172SN/A return -1; 3182SN/A 3195282Srstrong@cs.ucsd.edu return fd_map[tgt_fd].fd; 3202SN/A} 3212SN/A 3225282Srstrong@cs.ucsd.eduProcess::FdMap * 3235282Srstrong@cs.ucsd.eduProcess::sim_fd_obj(int tgt_fd) 3245282Srstrong@cs.ucsd.edu{ 3258324Ssteve.reinhardt@amd.com if (tgt_fd < 0 || tgt_fd > MAX_FD) 3268324Ssteve.reinhardt@amd.com return NULL; 3275282Srstrong@cs.ucsd.edu 3285282Srstrong@cs.ucsd.edu return &fd_map[tgt_fd]; 3295282Srstrong@cs.ucsd.edu} 3307487Ssteve.reinhardt@amd.com 3318601Ssteve.reinhardt@amd.comvoid 3328601Ssteve.reinhardt@amd.comProcess::allocateMem(Addr vaddr, int64_t size, bool clobber) 3338601Ssteve.reinhardt@amd.com{ 3348601Ssteve.reinhardt@amd.com int npages = divCeil(size, (int64_t)VMPageSize); 3358601Ssteve.reinhardt@amd.com Addr paddr = system->allocPhysPages(npages); 3368601Ssteve.reinhardt@amd.com pTable->map(vaddr, paddr, size, clobber); 3378601Ssteve.reinhardt@amd.com} 3388601Ssteve.reinhardt@amd.com 3394434Ssaidi@eecs.umich.edubool 3408539Sgblack@eecs.umich.eduProcess::fixupStackFault(Addr vaddr) 3414434Ssaidi@eecs.umich.edu{ 3428539Sgblack@eecs.umich.edu // Check if this is already on the stack and there's just no page there 3438539Sgblack@eecs.umich.edu // yet. 3444434Ssaidi@eecs.umich.edu if (vaddr >= stack_min && vaddr < stack_base) { 3458601Ssteve.reinhardt@amd.com allocateMem(roundDown(vaddr, VMPageSize), VMPageSize); 3464434Ssaidi@eecs.umich.edu return true; 3474434Ssaidi@eecs.umich.edu } 3484434Ssaidi@eecs.umich.edu 3498539Sgblack@eecs.umich.edu // We've accessed the next page of the stack, so extend it to include 3508539Sgblack@eecs.umich.edu // this address. 3515154Sgblack@eecs.umich.edu if (vaddr < stack_min && vaddr >= stack_base - max_stack_size) { 3525154Sgblack@eecs.umich.edu while (vaddr < stack_min) { 3535154Sgblack@eecs.umich.edu stack_min -= TheISA::PageBytes; 3548539Sgblack@eecs.umich.edu if (stack_base - stack_min > max_stack_size) 3555154Sgblack@eecs.umich.edu fatal("Maximum stack size exceeded\n"); 3568539Sgblack@eecs.umich.edu if (stack_base - stack_min > 8 * 1024 * 1024) 3575154Sgblack@eecs.umich.edu fatal("Over max stack size for one thread\n"); 3588601Ssteve.reinhardt@amd.com allocateMem(stack_min, TheISA::PageBytes); 3595823Ssaidi@eecs.umich.edu inform("Increasing stack size by one page."); 3605154Sgblack@eecs.umich.edu }; 3614434Ssaidi@eecs.umich.edu return true; 3624434Ssaidi@eecs.umich.edu } 3638539Sgblack@eecs.umich.edu warn("Not extending stack: address %#x isn't at the end of the stack.", 3648539Sgblack@eecs.umich.edu vaddr); 3654434Ssaidi@eecs.umich.edu return false; 3664434Ssaidi@eecs.umich.edu} 3674434Ssaidi@eecs.umich.edu 3687487Ssteve.reinhardt@amd.com// find all offsets for currently open files and save them 3695282Srstrong@cs.ucsd.eduvoid 3707487Ssteve.reinhardt@amd.comProcess::fix_file_offsets() 3717487Ssteve.reinhardt@amd.com{ 3725282Srstrong@cs.ucsd.edu Process::FdMap *fdo_stdin = &fd_map[STDIN_FILENO]; 3735282Srstrong@cs.ucsd.edu Process::FdMap *fdo_stdout = &fd_map[STDOUT_FILENO]; 3745282Srstrong@cs.ucsd.edu Process::FdMap *fdo_stderr = &fd_map[STDERR_FILENO]; 3755282Srstrong@cs.ucsd.edu string in = fdo_stdin->filename; 3765282Srstrong@cs.ucsd.edu string out = fdo_stdout->filename; 3775514SMichael.Adler@intel.com string err = fdo_stderr->filename; 3785282Srstrong@cs.ucsd.edu 3795282Srstrong@cs.ucsd.edu // initialize file descriptors to default: same as simulator 3805282Srstrong@cs.ucsd.edu int stdin_fd, stdout_fd, stderr_fd; 3815282Srstrong@cs.ucsd.edu 3825282Srstrong@cs.ucsd.edu if (in == "stdin" || in == "cin") 3835282Srstrong@cs.ucsd.edu stdin_fd = STDIN_FILENO; 3845282Srstrong@cs.ucsd.edu else if (in == "None") 3855282Srstrong@cs.ucsd.edu stdin_fd = -1; 3867487Ssteve.reinhardt@amd.com else { 3877487Ssteve.reinhardt@amd.com // open standard in and seek to the right location 3885282Srstrong@cs.ucsd.edu stdin_fd = Process::openInputFile(in); 3895282Srstrong@cs.ucsd.edu if (lseek(stdin_fd, fdo_stdin->fileOffset, SEEK_SET) < 0) 3905282Srstrong@cs.ucsd.edu panic("Unable to seek to correct location in file: %s", in); 3915282Srstrong@cs.ucsd.edu } 3925282Srstrong@cs.ucsd.edu 3935282Srstrong@cs.ucsd.edu if (out == "stdout" || out == "cout") 3945282Srstrong@cs.ucsd.edu stdout_fd = STDOUT_FILENO; 3955282Srstrong@cs.ucsd.edu else if (out == "stderr" || out == "cerr") 3965282Srstrong@cs.ucsd.edu stdout_fd = STDERR_FILENO; 3975282Srstrong@cs.ucsd.edu else if (out == "None") 3985282Srstrong@cs.ucsd.edu stdout_fd = -1; 3997487Ssteve.reinhardt@amd.com else { 4005282Srstrong@cs.ucsd.edu stdout_fd = Process::openOutputFile(out); 4015514SMichael.Adler@intel.com if (lseek(stdout_fd, fdo_stdout->fileOffset, SEEK_SET) < 0) 4025514SMichael.Adler@intel.com panic("Unable to seek to correct location in file: %s", out); 4035282Srstrong@cs.ucsd.edu } 4045282Srstrong@cs.ucsd.edu 4055514SMichael.Adler@intel.com if (err == "stdout" || err == "cout") 4065514SMichael.Adler@intel.com stderr_fd = STDOUT_FILENO; 4075514SMichael.Adler@intel.com else if (err == "stderr" || err == "cerr") 4085514SMichael.Adler@intel.com stderr_fd = STDERR_FILENO; 4095514SMichael.Adler@intel.com else if (err == "None") 4105514SMichael.Adler@intel.com stderr_fd = -1; 4115514SMichael.Adler@intel.com else if (err == out) 4125514SMichael.Adler@intel.com stderr_fd = stdout_fd; 4135514SMichael.Adler@intel.com else { 4145514SMichael.Adler@intel.com stderr_fd = Process::openOutputFile(err); 4155514SMichael.Adler@intel.com if (lseek(stderr_fd, fdo_stderr->fileOffset, SEEK_SET) < 0) 4165514SMichael.Adler@intel.com panic("Unable to seek to correct location in file: %s", err); 4175514SMichael.Adler@intel.com } 4185282Srstrong@cs.ucsd.edu 4195282Srstrong@cs.ucsd.edu fdo_stdin->fd = stdin_fd; 4205282Srstrong@cs.ucsd.edu fdo_stdout->fd = stdout_fd; 4215282Srstrong@cs.ucsd.edu fdo_stderr->fd = stderr_fd; 4225282Srstrong@cs.ucsd.edu 4235282Srstrong@cs.ucsd.edu 4245282Srstrong@cs.ucsd.edu for (int free_fd = 3; free_fd <= MAX_FD; ++free_fd) { 4255282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[free_fd]; 4265282Srstrong@cs.ucsd.edu if (fdo->fd != -1) { 4275282Srstrong@cs.ucsd.edu if (fdo->isPipe){ 4285282Srstrong@cs.ucsd.edu if (fdo->filename == "PIPE-WRITE") 4295282Srstrong@cs.ucsd.edu continue; 4305282Srstrong@cs.ucsd.edu else { 4315282Srstrong@cs.ucsd.edu assert (fdo->filename == "PIPE-READ"); 4325282Srstrong@cs.ucsd.edu //create a new pipe 4335282Srstrong@cs.ucsd.edu int fds[2]; 4345282Srstrong@cs.ucsd.edu int pipe_retval = pipe(fds); 4355282Srstrong@cs.ucsd.edu 4365282Srstrong@cs.ucsd.edu if (pipe_retval < 0) { 4375282Srstrong@cs.ucsd.edu // error 4385282Srstrong@cs.ucsd.edu panic("Unable to create new pipe."); 4395282Srstrong@cs.ucsd.edu } 4405282Srstrong@cs.ucsd.edu fdo->fd = fds[0]; //set read pipe 4415282Srstrong@cs.ucsd.edu Process::FdMap *fdo_write = &fd_map[fdo->readPipeSource]; 4425282Srstrong@cs.ucsd.edu if (fdo_write->filename != "PIPE-WRITE") 4435282Srstrong@cs.ucsd.edu panic ("Couldn't find write end of the pipe"); 4445282Srstrong@cs.ucsd.edu 4455282Srstrong@cs.ucsd.edu fdo_write->fd = fds[1];//set write pipe 4465282Srstrong@cs.ucsd.edu } 4475282Srstrong@cs.ucsd.edu } else { 4485282Srstrong@cs.ucsd.edu //Open file 4495282Srstrong@cs.ucsd.edu int fd = open(fdo->filename.c_str(), fdo->flags, fdo->mode); 4505282Srstrong@cs.ucsd.edu 4515282Srstrong@cs.ucsd.edu if (fd == -1) 4525282Srstrong@cs.ucsd.edu panic("Unable to open file: %s", fdo->filename); 4535282Srstrong@cs.ucsd.edu fdo->fd = fd; 4545282Srstrong@cs.ucsd.edu 4555282Srstrong@cs.ucsd.edu //Seek to correct location before checkpoint 4565282Srstrong@cs.ucsd.edu if (lseek(fd,fdo->fileOffset, SEEK_SET) < 0) 4577487Ssteve.reinhardt@amd.com panic("Unable to seek to correct location in file: %s", 4587487Ssteve.reinhardt@amd.com fdo->filename); 4595282Srstrong@cs.ucsd.edu } 4605282Srstrong@cs.ucsd.edu } 4615282Srstrong@cs.ucsd.edu } 4625282Srstrong@cs.ucsd.edu} 4637487Ssteve.reinhardt@amd.com 4645282Srstrong@cs.ucsd.eduvoid 4657487Ssteve.reinhardt@amd.comProcess::find_file_offsets() 4667487Ssteve.reinhardt@amd.com{ 4675282Srstrong@cs.ucsd.edu for (int free_fd = 0; free_fd <= MAX_FD; ++free_fd) { 4685282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[free_fd]; 4695282Srstrong@cs.ucsd.edu if (fdo->fd != -1) { 4705282Srstrong@cs.ucsd.edu fdo->fileOffset = lseek(fdo->fd, 0, SEEK_CUR); 4717487Ssteve.reinhardt@amd.com } else { 4725282Srstrong@cs.ucsd.edu fdo->filename = "NULL"; 4735282Srstrong@cs.ucsd.edu fdo->fileOffset = 0; 4745282Srstrong@cs.ucsd.edu } 4755282Srstrong@cs.ucsd.edu } 4765282Srstrong@cs.ucsd.edu} 4775282Srstrong@cs.ucsd.edu 4785282Srstrong@cs.ucsd.eduvoid 4797487Ssteve.reinhardt@amd.comProcess::setReadPipeSource(int read_pipe_fd, int source_fd) 4807487Ssteve.reinhardt@amd.com{ 4815282Srstrong@cs.ucsd.edu Process::FdMap *fdo = &fd_map[read_pipe_fd]; 4825282Srstrong@cs.ucsd.edu fdo->readPipeSource = source_fd; 4835282Srstrong@cs.ucsd.edu} 4845282Srstrong@cs.ucsd.edu 4855282Srstrong@cs.ucsd.eduvoid 4865282Srstrong@cs.ucsd.eduProcess::FdMap::serialize(std::ostream &os) 4875282Srstrong@cs.ucsd.edu{ 4885282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(fd); 4895282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(isPipe); 4905282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(filename); 4915282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(flags); 4925282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(readPipeSource); 4935282Srstrong@cs.ucsd.edu SERIALIZE_SCALAR(fileOffset); 4945282Srstrong@cs.ucsd.edu} 4955282Srstrong@cs.ucsd.edu 4965282Srstrong@cs.ucsd.eduvoid 4975282Srstrong@cs.ucsd.eduProcess::FdMap::unserialize(Checkpoint *cp, const std::string §ion) 4985282Srstrong@cs.ucsd.edu{ 4995282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(fd); 5005282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(isPipe); 5015282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(filename); 5025282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(flags); 5035282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(readPipeSource); 5045282Srstrong@cs.ucsd.edu UNSERIALIZE_SCALAR(fileOffset); 5055282Srstrong@cs.ucsd.edu} 5065282Srstrong@cs.ucsd.edu 5073311Ssaidi@eecs.umich.eduvoid 5083311Ssaidi@eecs.umich.eduProcess::serialize(std::ostream &os) 5093311Ssaidi@eecs.umich.edu{ 5103311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(brk_point); 5113311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(stack_base); 5123311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(stack_size); 5133311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(stack_min); 5143311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(next_thread_stack_base); 5153311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(mmap_start); 5163311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(mmap_end); 5173311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(nxm_start); 5183311Ssaidi@eecs.umich.edu SERIALIZE_SCALAR(nxm_end); 5195282Srstrong@cs.ucsd.edu find_file_offsets(); 5205282Srstrong@cs.ucsd.edu pTable->serialize(os); 5215282Srstrong@cs.ucsd.edu for (int x = 0; x <= MAX_FD; x++) { 5225282Srstrong@cs.ucsd.edu nameOut(os, csprintf("%s.FdMap%d", name(), x)); 5235282Srstrong@cs.ucsd.edu fd_map[x].serialize(os); 5245282Srstrong@cs.ucsd.edu } 5256820SLisa.Hsu@amd.com SERIALIZE_SCALAR(M5_pid); 5263311Ssaidi@eecs.umich.edu 5273311Ssaidi@eecs.umich.edu} 5283311Ssaidi@eecs.umich.edu 5293311Ssaidi@eecs.umich.eduvoid 5303311Ssaidi@eecs.umich.eduProcess::unserialize(Checkpoint *cp, const std::string §ion) 5313311Ssaidi@eecs.umich.edu{ 5323311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(brk_point); 5333311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(stack_base); 5343311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(stack_size); 5353311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(stack_min); 5363311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(next_thread_stack_base); 5373311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(mmap_start); 5383311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(mmap_end); 5393311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(nxm_start); 5403311Ssaidi@eecs.umich.edu UNSERIALIZE_SCALAR(nxm_end); 5413311Ssaidi@eecs.umich.edu pTable->unserialize(cp, section); 5425282Srstrong@cs.ucsd.edu for (int x = 0; x <= MAX_FD; x++) { 5435282Srstrong@cs.ucsd.edu fd_map[x].unserialize(cp, csprintf("%s.FdMap%d", section, x)); 5447487Ssteve.reinhardt@amd.com } 5455282Srstrong@cs.ucsd.edu fix_file_offsets(); 5466820SLisa.Hsu@amd.com UNSERIALIZE_OPT_SCALAR(M5_pid); 5476820SLisa.Hsu@amd.com // The above returns a bool so that you could do something if you don't 5486820SLisa.Hsu@amd.com // find the param in the checkpoint if you wanted to, like set a default 5496820SLisa.Hsu@amd.com // but in this case we'll just stick with the instantianted value if not 5506820SLisa.Hsu@amd.com // found. 5513311Ssaidi@eecs.umich.edu} 5522SN/A 5532SN/A 5542SN/A//////////////////////////////////////////////////////////////////////// 5552SN/A// 5562SN/A// LiveProcess member definitions 5572SN/A// 5582SN/A//////////////////////////////////////////////////////////////////////// 5592SN/A 56012SN/A 5615154Sgblack@eecs.umich.eduLiveProcess::LiveProcess(LiveProcessParams * params, ObjectFile *_objFile) 5625154Sgblack@eecs.umich.edu : Process(params), objFile(_objFile), 5635154Sgblack@eecs.umich.edu argv(params->cmd), envp(params->env), cwd(params->cwd) 5642SN/A{ 5655154Sgblack@eecs.umich.edu __uid = params->uid; 5665154Sgblack@eecs.umich.edu __euid = params->euid; 5675154Sgblack@eecs.umich.edu __gid = params->gid; 5685154Sgblack@eecs.umich.edu __egid = params->egid; 5695154Sgblack@eecs.umich.edu __pid = params->pid; 5705154Sgblack@eecs.umich.edu __ppid = params->ppid; 5713114Sgblack@eecs.umich.edu 5725154Sgblack@eecs.umich.edu prog_fname = params->cmd[0]; 57312SN/A 5741158SN/A // load up symbols, if any... these may be used for debugging or 5751158SN/A // profiling. 5761158SN/A if (!debugSymbolTable) { 5771158SN/A debugSymbolTable = new SymbolTable(); 5781158SN/A if (!objFile->loadGlobalSymbols(debugSymbolTable) || 5791158SN/A !objFile->loadLocalSymbols(debugSymbolTable)) { 5801158SN/A // didn't load any symbols 5811158SN/A delete debugSymbolTable; 5821158SN/A debugSymbolTable = NULL; 5831158SN/A } 5841158SN/A } 5852378SN/A} 5861158SN/A 5872378SN/Avoid 5882680Sktlim@umich.eduLiveProcess::syscall(int64_t callnum, ThreadContext *tc) 5892093SN/A{ 5902093SN/A num_syscalls++; 5912093SN/A 5922093SN/A SyscallDesc *desc = getDesc(callnum); 5932093SN/A if (desc == NULL) 5942093SN/A fatal("Syscall %d out of range", callnum); 5952093SN/A 5962680Sktlim@umich.edu desc->doSyscall(callnum, this, tc); 5972093SN/A} 5982SN/A 5996701Sgblack@eecs.umich.eduIntReg 6006701Sgblack@eecs.umich.eduLiveProcess::getSyscallArg(ThreadContext *tc, int &i, int width) 6016701Sgblack@eecs.umich.edu{ 6026701Sgblack@eecs.umich.edu return getSyscallArg(tc, i); 6036701Sgblack@eecs.umich.edu} 6046701Sgblack@eecs.umich.edu 6052715Sstever@eecs.umich.eduLiveProcess * 6065154Sgblack@eecs.umich.eduLiveProcess::create(LiveProcessParams * params) 6072715Sstever@eecs.umich.edu{ 6082715Sstever@eecs.umich.edu LiveProcess *process = NULL; 6092715Sstever@eecs.umich.edu 6105154Sgblack@eecs.umich.edu string executable = 6115154Sgblack@eecs.umich.edu params->executable == "" ? params->cmd[0] : params->executable; 6122715Sstever@eecs.umich.edu ObjectFile *objFile = createObjectFile(executable); 6132715Sstever@eecs.umich.edu if (objFile == NULL) { 6142715Sstever@eecs.umich.edu fatal("Can't load object file %s", executable); 6152715Sstever@eecs.umich.edu } 6162715Sstever@eecs.umich.edu 6173917Ssaidi@eecs.umich.edu if (objFile->isDynamic()) 6183917Ssaidi@eecs.umich.edu fatal("Object file is a dynamic executable however only static " 6195070Ssaidi@eecs.umich.edu "executables are supported!\n Please recompile your " 6203917Ssaidi@eecs.umich.edu "executable as a static binary and try again.\n"); 6213917Ssaidi@eecs.umich.edu 6225089Sgblack@eecs.umich.edu#if THE_ISA == ALPHA_ISA 6235753Ssteve.reinhardt@amd.com if (objFile->getArch() != ObjectFile::Alpha) 6245753Ssteve.reinhardt@amd.com fatal("Object file architecture does not match compiled ISA (Alpha)."); 6255753Ssteve.reinhardt@amd.com 6262715Sstever@eecs.umich.edu switch (objFile->getOpSys()) { 6272715Sstever@eecs.umich.edu case ObjectFile::Tru64: 6285154Sgblack@eecs.umich.edu process = new AlphaTru64Process(params, objFile); 6292715Sstever@eecs.umich.edu break; 6302715Sstever@eecs.umich.edu 6315753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 6325753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 6335753Ssteve.reinhardt@amd.com // fall through 6342715Sstever@eecs.umich.edu case ObjectFile::Linux: 6355154Sgblack@eecs.umich.edu process = new AlphaLinuxProcess(params, objFile); 6362715Sstever@eecs.umich.edu break; 6372715Sstever@eecs.umich.edu 6382715Sstever@eecs.umich.edu default: 6392715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 6402715Sstever@eecs.umich.edu } 6412715Sstever@eecs.umich.edu#elif THE_ISA == SPARC_ISA 6425753Ssteve.reinhardt@amd.com if (objFile->getArch() != ObjectFile::SPARC64 && 6435753Ssteve.reinhardt@amd.com objFile->getArch() != ObjectFile::SPARC32) 6442715Sstever@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (SPARC)."); 6452715Sstever@eecs.umich.edu switch (objFile->getOpSys()) { 6465753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 6475753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 6485753Ssteve.reinhardt@amd.com // fall through 6492715Sstever@eecs.umich.edu case ObjectFile::Linux: 6504111Sgblack@eecs.umich.edu if (objFile->getArch() == ObjectFile::SPARC64) { 6515154Sgblack@eecs.umich.edu process = new Sparc64LinuxProcess(params, objFile); 6524111Sgblack@eecs.umich.edu } else { 6535154Sgblack@eecs.umich.edu process = new Sparc32LinuxProcess(params, objFile); 6544111Sgblack@eecs.umich.edu } 6552715Sstever@eecs.umich.edu break; 6562715Sstever@eecs.umich.edu 6572715Sstever@eecs.umich.edu 6582715Sstever@eecs.umich.edu case ObjectFile::Solaris: 6595154Sgblack@eecs.umich.edu process = new SparcSolarisProcess(params, objFile); 6602715Sstever@eecs.umich.edu break; 6615753Ssteve.reinhardt@amd.com 6622715Sstever@eecs.umich.edu default: 6632715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 6642715Sstever@eecs.umich.edu } 6654157Sgblack@eecs.umich.edu#elif THE_ISA == X86_ISA 6665874Sgblack@eecs.umich.edu if (objFile->getArch() != ObjectFile::X86_64 && 6675874Sgblack@eecs.umich.edu objFile->getArch() != ObjectFile::I386) 6684166Sgblack@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (x86)."); 6694157Sgblack@eecs.umich.edu switch (objFile->getOpSys()) { 6705753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 6715753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 6725753Ssteve.reinhardt@amd.com // fall through 6734166Sgblack@eecs.umich.edu case ObjectFile::Linux: 6745874Sgblack@eecs.umich.edu if (objFile->getArch() == ObjectFile::X86_64) { 6755955Sgblack@eecs.umich.edu process = new X86_64LinuxProcess(params, objFile); 6765874Sgblack@eecs.umich.edu } else { 6775955Sgblack@eecs.umich.edu process = new I386LinuxProcess(params, objFile); 6785874Sgblack@eecs.umich.edu } 6794166Sgblack@eecs.umich.edu break; 6805753Ssteve.reinhardt@amd.com 6814157Sgblack@eecs.umich.edu default: 6824157Sgblack@eecs.umich.edu fatal("Unknown/unsupported operating system."); 6834157Sgblack@eecs.umich.edu } 6842715Sstever@eecs.umich.edu#elif THE_ISA == MIPS_ISA 6852715Sstever@eecs.umich.edu if (objFile->getArch() != ObjectFile::Mips) 6862715Sstever@eecs.umich.edu fatal("Object file architecture does not match compiled ISA (MIPS)."); 6872715Sstever@eecs.umich.edu switch (objFile->getOpSys()) { 6885753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 6895753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 6905753Ssteve.reinhardt@amd.com // fall through 6912715Sstever@eecs.umich.edu case ObjectFile::Linux: 6925154Sgblack@eecs.umich.edu process = new MipsLinuxProcess(params, objFile); 6932715Sstever@eecs.umich.edu break; 6942715Sstever@eecs.umich.edu 6952715Sstever@eecs.umich.edu default: 6962715Sstever@eecs.umich.edu fatal("Unknown/unsupported operating system."); 6972715Sstever@eecs.umich.edu } 6985335Shines@cs.fsu.edu#elif THE_ISA == ARM_ISA 6997095Sgblack@eecs.umich.edu if (objFile->getArch() != ObjectFile::Arm && 7007095Sgblack@eecs.umich.edu objFile->getArch() != ObjectFile::Thumb) 7015335Shines@cs.fsu.edu fatal("Object file architecture does not match compiled ISA (ARM)."); 7025335Shines@cs.fsu.edu switch (objFile->getOpSys()) { 7035753Ssteve.reinhardt@amd.com case ObjectFile::UnknownOpSys: 7045753Ssteve.reinhardt@amd.com warn("Unknown operating system; assuming Linux."); 7055753Ssteve.reinhardt@amd.com // fall through 7065335Shines@cs.fsu.edu case ObjectFile::Linux: 7077096Sgblack@eecs.umich.edu process = new ArmLinuxProcess(params, objFile, objFile->getArch()); 7085335Shines@cs.fsu.edu break; 7096392Ssaidi@eecs.umich.edu case ObjectFile::LinuxArmOABI: 7106392Ssaidi@eecs.umich.edu fatal("M5 does not support ARM OABI binaries. Please recompile with an" 7116392Ssaidi@eecs.umich.edu " EABI compiler."); 7125335Shines@cs.fsu.edu default: 7135335Shines@cs.fsu.edu fatal("Unknown/unsupported operating system."); 7145335Shines@cs.fsu.edu } 7156691Stjones1@inf.ed.ac.uk#elif THE_ISA == POWER_ISA 7166691Stjones1@inf.ed.ac.uk if (objFile->getArch() != ObjectFile::Power) 7176691Stjones1@inf.ed.ac.uk fatal("Object file architecture does not match compiled ISA (Power)."); 7186691Stjones1@inf.ed.ac.uk switch (objFile->getOpSys()) { 7196691Stjones1@inf.ed.ac.uk case ObjectFile::UnknownOpSys: 7206691Stjones1@inf.ed.ac.uk warn("Unknown operating system; assuming Linux."); 7216691Stjones1@inf.ed.ac.uk // fall through 7226691Stjones1@inf.ed.ac.uk case ObjectFile::Linux: 7236691Stjones1@inf.ed.ac.uk process = new PowerLinuxProcess(params, objFile); 7246691Stjones1@inf.ed.ac.uk break; 7256691Stjones1@inf.ed.ac.uk 7266691Stjones1@inf.ed.ac.uk default: 7276691Stjones1@inf.ed.ac.uk fatal("Unknown/unsupported operating system."); 7286691Stjones1@inf.ed.ac.uk } 7292715Sstever@eecs.umich.edu#else 7302715Sstever@eecs.umich.edu#error "THE_ISA not set" 7312715Sstever@eecs.umich.edu#endif 7322715Sstever@eecs.umich.edu 7332715Sstever@eecs.umich.edu 7342715Sstever@eecs.umich.edu if (process == NULL) 7352715Sstever@eecs.umich.edu fatal("Unknown error creating process object."); 7362715Sstever@eecs.umich.edu return process; 7372715Sstever@eecs.umich.edu} 7382715Sstever@eecs.umich.edu 7394762Snate@binkert.orgLiveProcess * 7404762Snate@binkert.orgLiveProcessParams::create() 7412715Sstever@eecs.umich.edu{ 7425154Sgblack@eecs.umich.edu return LiveProcess::create(this); 7432715Sstever@eecs.umich.edu} 744