process.cc revision 2107
11060SN/A/* 21762SN/A * Copyright (c) 2001-2005 The Regents of The University of Michigan 31060SN/A * All rights reserved. 41060SN/A * 51060SN/A * Redistribution and use in source and binary forms, with or without 61060SN/A * modification, are permitted provided that the following conditions are 71060SN/A * met: redistributions of source code must retain the above copyright 81060SN/A * notice, this list of conditions and the following disclaimer; 91060SN/A * redistributions in binary form must reproduce the above copyright 101060SN/A * notice, this list of conditions and the following disclaimer in the 111060SN/A * documentation and/or other materials provided with the distribution; 121060SN/A * neither the name of the copyright holders nor the names of its 131060SN/A * contributors may be used to endorse or promote products derived from 141060SN/A * this software without specific prior written permission. 151060SN/A * 161060SN/A * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 171060SN/A * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 181060SN/A * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 191060SN/A * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 201060SN/A * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 211060SN/A * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 221060SN/A * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 231060SN/A * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 241060SN/A * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 251060SN/A * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 261060SN/A * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 272665Ssaidi@eecs.umich.edu */ 282665Ssaidi@eecs.umich.edu 291060SN/A#include <unistd.h> 301060SN/A#include <fcntl.h> 311464SN/A 321464SN/A#include <cstdio> 331060SN/A#include <string> 342292SN/A 351464SN/A#include "base/intmath.hh" 361060SN/A#include "base/loader/object_file.hh" 372669Sktlim@umich.edu#include "base/loader/symtab.hh" 381060SN/A#include "base/statistics.hh" 391060SN/A#include "config/full_system.hh" 401858SN/A#include "cpu/exec_context.hh" 411464SN/A#include "cpu/smt.hh" 421464SN/A#include "encumbered/cpu/full/thread.hh" 432669Sktlim@umich.edu#include "encumbered/eio/eio.hh" 441060SN/A#include "encumbered/mem/functional/main.hh" 452669Sktlim@umich.edu#include "sim/builder.hh" 462292SN/A#include "sim/fake_syscall.hh" 472292SN/A#include "sim/process.hh" 481717SN/A#include "sim/stats.hh" 491717SN/A 501717SN/A#ifdef TARGET_ALPHA 511717SN/A#include "arch/alpha/alpha_tru64_process.hh" 522292SN/A#include "arch/alpha/alpha_linux_process.hh" 531060SN/A#endif 541060SN/A 551060SN/Ausing namespace std; 561060SN/Ausing namespace TheISA; 571060SN/A 581060SN/A// 591061SN/A// The purpose of this code is to fake the loader & syscall mechanism 601061SN/A// when there's no OS: thus there's no resone to use it in FULL_SYSTEM 611060SN/A// mode when we do have an OS 621060SN/A// 631061SN/A#if FULL_SYSTEM 641060SN/A#error "process.cc not compatible with FULL_SYSTEM" 651060SN/A#endif 661060SN/A 671060SN/A// current number of allocated processes 682292SN/Aint num_processes = 0; 691060SN/A 702292SN/AProcess::Process(const string &nm, 712107SN/A int stdin_fd, // initial I/O descriptors 722292SN/A int stdout_fd, 732292SN/A int stderr_fd) 742292SN/A : SimObject(nm) 752107SN/A{ 762292SN/A // allocate memory space 772107SN/A memory = new MainMemory(nm + ".MainMem"); 781060SN/A 792292SN/A // allocate initial register file 802292SN/A init_regs = new RegFile; 812292SN/A memset(init_regs, 0, sizeof(RegFile)); 822292SN/A 832292SN/A // initialize first 3 fds (stdin, stdout, stderr) 842292SN/A fd_map[STDIN_FILENO] = stdin_fd; 851060SN/A fd_map[STDOUT_FILENO] = stdout_fd; 862292SN/A fd_map[STDERR_FILENO] = stderr_fd; 872292SN/A 881060SN/A // mark remaining fds as free 891060SN/A for (int i = 3; i <= MAX_FD; ++i) { 902292SN/A fd_map[i] = -1; 912107SN/A } 921060SN/A 931060SN/A mmap_start = mmap_end = 0; 941060SN/A nxm_start = nxm_end = 0; 951060SN/A // other parameters will be initialized when the program is loaded 961060SN/A} 971060SN/A 982292SN/Avoid 991060SN/AProcess::regStats() 1001060SN/A{ 1012292SN/A using namespace Stats; 1022292SN/A 1032292SN/A num_syscalls 1042292SN/A .name(name() + ".PROG:num_syscalls") 1052292SN/A .desc("Number of system calls") 1062292SN/A ; 1072292SN/A} 1081060SN/A 1092132SN/A// 1101060SN/A// static helper functions 1112292SN/A// 1122292SN/Aint 1132292SN/AProcess::openInputFile(const string &filename) 1142292SN/A{ 1152292SN/A int fd = open(filename.c_str(), O_RDONLY); 1162292SN/A 1172292SN/A if (fd == -1) { 1182292SN/A perror(NULL); 1191060SN/A cerr << "unable to open \"" << filename << "\" for reading\n"; 1202132SN/A fatal("can't open input file"); 1211060SN/A } 1221060SN/A 1231060SN/A return fd; 1241060SN/A} 1252132SN/A 1262132SN/A 1271060SN/Aint 1281684SN/AProcess::openOutputFile(const string &filename) 1291060SN/A{ 1301060SN/A int fd = open(filename.c_str(), O_WRONLY | O_CREAT | O_TRUNC, 0774); 1311060SN/A 1321060SN/A if (fd == -1) { 1332292SN/A perror(NULL); 1342292SN/A cerr << "unable to open \"" << filename << "\" for writing\n"; 1352292SN/A fatal("can't open output file"); 1362292SN/A } 1372292SN/A 1382292SN/A return fd; 1392292SN/A} 1402292SN/A 1411060SN/A 1421464SN/Aint 1431464SN/AProcess::registerExecContext(ExecContext *xc) 1441464SN/A{ 1452308SN/A // add to list 1462308SN/A int myIndex = execContexts.size(); 1472308SN/A execContexts.push_back(xc); 1481060SN/A 1491060SN/A if (myIndex == 0) { 1501060SN/A // copy process's initial regs struct 1511060SN/A xc->regs = *init_regs; 1521060SN/A } 1531060SN/A 1541060SN/A // return CPU number to caller and increment available CPU count 1551060SN/A return myIndex; 1561060SN/A} 1571060SN/A 1581060SN/Avoid 1591060SN/AProcess::startup() 1602292SN/A{ 1612292SN/A if (execContexts.empty()) 1622292SN/A return; 1631060SN/A 1641060SN/A // first exec context for this process... initialize & enable 1651060SN/A ExecContext *xc = execContexts[0]; 1661060SN/A 1671060SN/A // mark this context as active so it will start ticking. 1681060SN/A xc->activate(0); 1692292SN/A} 1702292SN/A 1712292SN/Avoid 1722292SN/AProcess::replaceExecContext(ExecContext *xc, int xcIndex) 1732292SN/A{ 1742292SN/A if (xcIndex >= execContexts.size()) { 1751060SN/A panic("replaceExecContext: bad xcIndex, %d >= %d\n", 1761060SN/A xcIndex, execContexts.size()); 1771060SN/A } 1781060SN/A 1791060SN/A execContexts[xcIndex] = xc; 1801060SN/A} 1811060SN/A 1821060SN/A// map simulator fd sim_fd to target fd tgt_fd 1831060SN/Avoid 1841060SN/AProcess::dup_fd(int sim_fd, int tgt_fd) 1851060SN/A{ 1861060SN/A if (tgt_fd < 0 || tgt_fd > MAX_FD) 1871060SN/A panic("Process::dup_fd tried to dup past MAX_FD (%d)", tgt_fd); 1881060SN/A 1891060SN/A fd_map[tgt_fd] = sim_fd; 1902292SN/A} 1912292SN/A 1922292SN/A 1931060SN/A// generate new target fd for sim_fd 1941060SN/Aint 1951060SN/AProcess::alloc_fd(int sim_fd) 1962308SN/A{ 1972292SN/A // in case open() returns an error, don't allocate a new fd 1981060SN/A if (sim_fd == -1) 1991060SN/A return -1; 2002132SN/A 2011060SN/A // find first free target fd 2022292SN/A for (int free_fd = 0; free_fd < MAX_FD; ++free_fd) { 2032669Sktlim@umich.edu if (fd_map[free_fd] == -1) { 2042669Sktlim@umich.edu fd_map[free_fd] = sim_fd; 2052669Sktlim@umich.edu return free_fd; 2062669Sktlim@umich.edu } 2072669Sktlim@umich.edu } 2082292SN/A 2091060SN/A panic("Process::alloc_fd: out of file descriptors!"); 2101060SN/A} 2111060SN/A 2121060SN/A 2131060SN/A// free target fd (e.g., after close) 2141060SN/Avoid 2151060SN/AProcess::free_fd(int tgt_fd) 2161060SN/A{ 2171060SN/A if (fd_map[tgt_fd] == -1) 2181060SN/A warn("Process::free_fd: request to free unused fd %d", tgt_fd); 2191060SN/A 2201060SN/A fd_map[tgt_fd] = -1; 2211060SN/A} 2221060SN/A 2231060SN/A 2241060SN/A// look up simulator fd for given target fd 2251060SN/Aint 2261060SN/AProcess::sim_fd(int tgt_fd) 2271060SN/A{ 2281060SN/A if (tgt_fd > MAX_FD) 2291060SN/A return -1; 2301464SN/A 2311464SN/A return fd_map[tgt_fd]; 2321464SN/A} 2331464SN/A 2341464SN/A 2351060SN/A 2361464SN/A// 2371464SN/A// need to declare these here since there is no concrete Process type 2381464SN/A// that can be constructed (i.e., no REGISTER_SIM_OBJECT() macro call, 2391464SN/A// which is where these get declared for concrete types). 2401060SN/A// 2411060SN/ADEFINE_SIM_OBJECT_CLASS_NAME("Process", Process) 2421060SN/A 2431060SN/A 2441060SN/A//////////////////////////////////////////////////////////////////////// 2451060SN/A// 2461060SN/A// LiveProcess member definitions 2471060SN/A// 2481060SN/A//////////////////////////////////////////////////////////////////////// 2491060SN/A 2501060SN/A 2511060SN/Astatic void 2521060SN/AcopyStringArray(vector<string> &strings, Addr array_ptr, Addr data_ptr, 2531060SN/A FunctionalMemory *memory) 2541060SN/A{ 2551060SN/A Addr data_ptr_swap; 2562292SN/A for (int i = 0; i < strings.size(); ++i) { 2572292SN/A data_ptr_swap = htog(data_ptr); 2582292SN/A memory->access(Write, array_ptr, &data_ptr_swap, sizeof(Addr)); 2592292SN/A memory->writeString(data_ptr, strings[i].c_str()); 2602292SN/A array_ptr += sizeof(Addr); 2612292SN/A data_ptr += strings[i].size() + 1; 2621060SN/A } 2631060SN/A // add NULL terminator 2641060SN/A data_ptr = 0; 2651060SN/A memory->access(Write, array_ptr, &data_ptr, sizeof(Addr)); 2662292SN/A} 2672292SN/A 2682292SN/ALiveProcess::LiveProcess(const string &nm, ObjectFile *objFile, 2692292SN/A int stdin_fd, int stdout_fd, int stderr_fd, 2702292SN/A vector<string> &argv, vector<string> &envp) 2712292SN/A : Process(nm, stdin_fd, stdout_fd, stderr_fd) 2722292SN/A{ 2732292SN/A prog_fname = argv[0]; 2741060SN/A 2751060SN/A prog_entry = objFile->entryPoint(); 2762292SN/A text_base = objFile->textBase(); 2772292SN/A text_size = objFile->textSize(); 2782292SN/A data_base = objFile->dataBase(); 2792107SN/A data_size = objFile->dataSize() + objFile->bssSize(); 2801060SN/A brk_point = roundUp(data_base + data_size, VMPageSize); 2811060SN/A 2821060SN/A // load object file into target memory 2831060SN/A objFile->loadSections(memory); 2841464SN/A 2851684SN/A // load up symbols, if any... these may be used for debugging or 2861464SN/A // profiling. 2871060SN/A if (!debugSymbolTable) { 2881464SN/A debugSymbolTable = new SymbolTable(); 2892292SN/A if (!objFile->loadGlobalSymbols(debugSymbolTable) || 2902292SN/A !objFile->loadLocalSymbols(debugSymbolTable)) { 2912292SN/A // didn't load any symbols 2922292SN/A delete debugSymbolTable; 2932292SN/A debugSymbolTable = NULL; 2942292SN/A } 2952292SN/A } 2962292SN/A 2972669Sktlim@umich.edu // Set up stack. On Alpha, stack goes below text section. This 2982669Sktlim@umich.edu // code should get moved to some architecture-specific spot. 2992669Sktlim@umich.edu stack_base = text_base - (409600+4096); 3002669Sktlim@umich.edu 3012669Sktlim@umich.edu // Set up region for mmaps. Tru64 seems to start just above 0 and 3022669Sktlim@umich.edu // grow up from there. 3031060SN/A mmap_start = mmap_end = 0x10000; 3041060SN/A 3051060SN/A // Set pointer for next thread stack. Reserve 8M for main stack. 3061060SN/A next_thread_stack_base = stack_base - (8 * 1024 * 1024); 3071060SN/A 3081060SN/A // Calculate how much space we need for arg & env arrays. 3091060SN/A int argv_array_size = sizeof(Addr) * (argv.size() + 1); 3101060SN/A int envp_array_size = sizeof(Addr) * (envp.size() + 1); 3112132SN/A int arg_data_size = 0; 3121060SN/A for (int i = 0; i < argv.size(); ++i) { 3131060SN/A arg_data_size += argv[i].size() + 1; 3141060SN/A } 3151060SN/A int env_data_size = 0; 3162292SN/A for (int i = 0; i < envp.size(); ++i) { 3171060SN/A env_data_size += envp[i].size() + 1; 3181060SN/A } 3191060SN/A 3201684SN/A int space_needed = 3211684SN/A argv_array_size + envp_array_size + arg_data_size + env_data_size; 3221684SN/A // for SimpleScalar compatibility 3231060SN/A if (space_needed < 16384) 3241060SN/A space_needed = 16384; 3251060SN/A 3261060SN/A // set bottom of stack 3271060SN/A stack_min = stack_base - space_needed; 3281060SN/A // align it 3291060SN/A stack_min &= ~7; 3301060SN/A stack_size = stack_base - stack_min; 3311060SN/A 3322292SN/A // map out initial stack contents 3331060SN/A Addr argv_array_base = stack_min + sizeof(uint64_t); // room for argc 3341060SN/A Addr envp_array_base = argv_array_base + argv_array_size; 3352292SN/A Addr arg_data_base = envp_array_base + envp_array_size; 3361060SN/A Addr env_data_base = arg_data_base + arg_data_size; 3371060SN/A 3381060SN/A // write contents to stack 3391060SN/A uint64_t argc = argv.size(); 3401060SN/A argc = htog(argc); 3411060SN/A memory->access(Write, stack_min, &argc, sizeof(uint64_t)); 3421060SN/A 3431060SN/A copyStringArray(argv, argv_array_base, arg_data_base, memory); 3442336SN/A copyStringArray(envp, envp_array_base, env_data_base, memory); 3452336SN/A 3461060SN/A init_regs->intRegFile[ArgumentReg0] = argc; 3471060SN/A init_regs->intRegFile[ArgumentReg1] = argv_array_base; 3481060SN/A init_regs->intRegFile[StackPointerReg] = stack_min; 3491060SN/A init_regs->intRegFile[GlobalPointerReg] = objFile->globalPointer(); 3501060SN/A init_regs->pc = prog_entry; 3511060SN/A init_regs->npc = prog_entry + sizeof(MachInst); 3521060SN/A} 3531060SN/A 3541060SN/A 3551060SN/ALiveProcess * 3561060SN/ALiveProcess::create(const string &nm, 3571060SN/A int stdin_fd, int stdout_fd, int stderr_fd, 3581060SN/A string executable, 3591060SN/A vector<string> &argv, vector<string> &envp) 3602292SN/A{ 3612292SN/A LiveProcess *process = NULL; 3622292SN/A ObjectFile *objFile = createObjectFile(executable); 3632292SN/A if (objFile == NULL) { 3641060SN/A fatal("Can't load object file %s", executable); 3651060SN/A } 3661060SN/A 3672292SN/A // check object type & set up syscall emulation pointer 3682336SN/A if (objFile->getArch() == ObjectFile::Alpha) { 3692308SN/A switch (objFile->getOpSys()) { 3702292SN/A case ObjectFile::Tru64: 3712292SN/A process = new AlphaTru64Process(nm, objFile, 3722292SN/A stdin_fd, stdout_fd, stderr_fd, 3732292SN/A argv, envp); 3742292SN/A break; 3752292SN/A 3762292SN/A case ObjectFile::Linux: 3772292SN/A process = new AlphaLinuxProcess(nm, objFile, 3782292SN/A stdin_fd, stdout_fd, stderr_fd, 3792292SN/A argv, envp); 3802292SN/A break; 3812292SN/A 3822292SN/A default: 3832292SN/A fatal("Unknown/unsupported operating system."); 3842292SN/A } 3852292SN/A } else { 3862292SN/A fatal("Unknown object file architecture."); 3872292SN/A } 3882292SN/A 3892292SN/A delete objFile; 3902292SN/A 3912292SN/A if (process == NULL) 3922292SN/A fatal("Unknown error creating process object."); 3932292SN/A 3942292SN/A return process; 3952292SN/A} 3962292SN/A 3972292SN/A 3982292SN/ABEGIN_DECLARE_SIM_OBJECT_PARAMS(LiveProcess) 3992292SN/A 4002292SN/A VectorParam<string> cmd; 4012292SN/A Param<string> executable; 4022292SN/A Param<string> input; 4032292SN/A Param<string> output; 4042292SN/A VectorParam<string> env; 4052292SN/A 4062292SN/AEND_DECLARE_SIM_OBJECT_PARAMS(LiveProcess) 4071060SN/A 4081464SN/A 4091464SN/ABEGIN_INIT_SIM_OBJECT_PARAMS(LiveProcess) 4101464SN/A 4111464SN/A INIT_PARAM(cmd, "command line (executable plus arguments)"), 4121464SN/A INIT_PARAM(executable, "executable (overrides cmd[0] if set)"), 4131464SN/A INIT_PARAM(input, "filename for stdin (dflt: use sim stdin)"), 4142292SN/A INIT_PARAM(output, "filename for stdout/stderr (dflt: use sim stdout)"), 4152292SN/A INIT_PARAM(env, "environment settings") 4161684SN/A 4172292SN/AEND_INIT_SIM_OBJECT_PARAMS(LiveProcess) 4181060SN/A 4191060SN/A 4201060SN/ACREATE_SIM_OBJECT(LiveProcess) 4211060SN/A{ 4221060SN/A string in = input; 4231060SN/A string out = output; 4241060SN/A 4251060SN/A // initialize file descriptors to default: same as simulator 4262292SN/A int stdin_fd, stdout_fd, stderr_fd; 4271060SN/A 4281060SN/A if (in == "stdin" || in == "cin") 4292292SN/A stdin_fd = STDIN_FILENO; 4301060SN/A else 4311684SN/A stdin_fd = Process::openInputFile(input); 4321464SN/A 4331684SN/A if (out == "stdout" || out == "cout") 4341684SN/A stdout_fd = STDOUT_FILENO; 4351464SN/A else if (out == "stderr" || out == "cerr") 4361684SN/A stdout_fd = STDERR_FILENO; 4371684SN/A else 4381464SN/A stdout_fd = Process::openOutputFile(out); 4391060SN/A 4402308SN/A stderr_fd = (stdout_fd != STDOUT_FILENO) ? stdout_fd : STDERR_FILENO; 4411060SN/A 4422308SN/A return LiveProcess::create(getInstanceName(), 4431060SN/A stdin_fd, stdout_fd, stderr_fd, 4441060SN/A (string)executable == "" ? cmd[0] : executable, 4452308SN/A cmd, env); 4461060SN/A} 4472308SN/A 4482308SN/AREGISTER_SIM_OBJECT("LiveProcess", LiveProcess) 4491060SN/A