1/* 2 * Copyright (c) 2001-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Nathan Binkert 29 * Steve Reinhardt 30 */ 31 32#ifndef __PROCESS_HH__ 33#define __PROCESS_HH__ 34 35// 36// The purpose of this code is to fake the loader & syscall mechanism 37// when there's no OS: thus there's no reason to use it in FULL_SYSTEM 38// mode when we do have an OS. 39// 40#include "config/full_system.hh" 41 42#if !FULL_SYSTEM 43 44#include <vector> 45 46#include "base/statistics.hh" 47#include "sim/sim_object.hh" 48 49class ThreadContext; 50class SyscallDesc; 51class PageTable; 52class TranslatingPort; 53class System; 54 55void 56copyStringArray(std::vector<std::string> &strings, Addr array_ptr, 57 Addr data_ptr, TranslatingPort* memPort); 58 59class Process : public SimObject 60{ 61 public: 62 63 /// Pointer to object representing the system this process is 64 /// running on. 65 System *system; 66 67 // have we initialized a thread context from this process? If 68 // yes, subsequent contexts are assumed to be for dynamically 69 // created threads and are not initialized. 70 bool initialContextLoaded; 71 72 // thread contexts associated with this process 73 std::vector<ThreadContext *> threadContexts; 74 75 // number of CPUs (esxec contexts, really) assigned to this process. 76 unsigned int numCpus() { return threadContexts.size(); } 77 78 // record of blocked context 79 struct WaitRec 80 { 81 Addr waitChan; 82 ThreadContext *waitingContext; 83 84 WaitRec(Addr chan, ThreadContext *ctx) 85 : waitChan(chan), waitingContext(ctx) 86 { } 87 }; 88 89 // list of all blocked contexts 90 std::list<WaitRec> waitList; 91 92 Addr brk_point; // top of the data segment 93 94 Addr stack_base; // stack segment base (highest address) 95 unsigned stack_size; // initial stack size 96 Addr stack_min; // lowest address accessed on the stack 97 98 // addr to use for next stack region (for multithreaded apps) 99 Addr next_thread_stack_base; 100 101 // Base of region for mmaps (when user doesn't specify an address). 102 Addr mmap_start; 103 Addr mmap_end; 104 105 // Base of region for nxm data 106 Addr nxm_start; 107 Addr nxm_end; 108 109 std::string prog_fname; // file name 110 111 Stats::Scalar<> num_syscalls; // number of syscalls executed 112 113 114 protected: 115 // constructor 116 Process(const std::string &nm, 117 System *_system, 118 int stdin_fd, // initial I/O descriptors 119 int stdout_fd, 120 int stderr_fd); 121 122 // post initialization startup 123 virtual void startup(); 124 125 protected: 126 /// Memory object for initialization (image loading) 127 TranslatingPort *initVirtMem; 128 129 public: 130 PageTable *pTable; 131 132 private: 133 // file descriptor remapping support 134 static const int MAX_FD = 256; // max legal fd value 135 int fd_map[MAX_FD+1]; 136 137 public: 138 // static helper functions to generate file descriptors for constructor 139 static int openInputFile(const std::string &filename); 140 static int openOutputFile(const std::string &filename); 141 142 // override of virtual SimObject method: register statistics 143 virtual void regStats(); 144 145 // register a thread context for this process. 146 // returns tc's cpu number (index into threadContexts[]) 147 int registerThreadContext(ThreadContext *tc); 148 149 150 void replaceThreadContext(ThreadContext *tc, int tcIndex); 151 152 // map simulator fd sim_fd to target fd tgt_fd 153 void dup_fd(int sim_fd, int tgt_fd); 154 155 // generate new target fd for sim_fd 156 int alloc_fd(int sim_fd); 157 158 // free target fd (e.g., after close) 159 void free_fd(int tgt_fd); 160 161 // look up simulator fd for given target fd 162 int sim_fd(int tgt_fd); 163 164 virtual void syscall(int64_t callnum, ThreadContext *tc) = 0;
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168}; 169 170// 171// "Live" process with system calls redirected to host system 172// 173class ObjectFile; 174class LiveProcess : public Process 175{ 176 protected: 177 ObjectFile *objFile; 178 std::vector<std::string> argv; 179 std::vector<std::string> envp; 180 181 LiveProcess(const std::string &nm, ObjectFile *objFile, 182 System *_system, int stdin_fd, int stdout_fd, int stderr_fd, 183 std::vector<std::string> &argv, 184 std::vector<std::string> &envp, 185 uint64_t _uid, uint64_t _euid, 186 uint64_t _gid, uint64_t _egid, 187 uint64_t _pid, uint64_t _ppid); 188 189 virtual void argsInit(int intSize, int pageSize); 190 191 // Id of the owner of the process 192 uint64_t __uid; 193 uint64_t __euid; 194 uint64_t __gid; 195 uint64_t __egid; 196 197 // pid of the process and it's parent 198 uint64_t __pid; 199 uint64_t __ppid; 200 201 public: 202 203 inline uint64_t uid() {return __uid;} 204 inline uint64_t euid() {return __euid;} 205 inline uint64_t gid() {return __gid;} 206 inline uint64_t egid() {return __egid;} 207 inline uint64_t pid() {return __pid;} 208 inline uint64_t ppid() {return __ppid;} 209 210 virtual void syscall(int64_t callnum, ThreadContext *tc); 211 212 virtual SyscallDesc* getDesc(int callnum) = 0; 213 214 // this function is used to create the LiveProcess object, since 215 // we can't tell which subclass of LiveProcess to use until we 216 // open and look at the object file. 217 static LiveProcess *create(const std::string &nm, 218 System *_system, 219 int stdin_fd, int stdout_fd, int stderr_fd, 220 std::string executable, 221 std::vector<std::string> &argv, 222 std::vector<std::string> &envp, 223 uint64_t _uid, uint64_t _euid, 224 uint64_t _gid, uint64_t _egid, 225 uint64_t _pid, uint64_t _ppid); 226}; 227 228 229#endif // !FULL_SYSTEM 230 231#endif // __PROCESS_HH__
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