util/statetrace/statetrace.cc

   1 /*
   2  * Copyright (c) 2006-2007 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: Gabe Black
  29  */
  30
  31 #include <cstring>
  32 #include <errno.h>
  33 #include <fstream>
  34 #include <iostream>
  35 #include <netdb.h>
  36 #include <netinet/in.h>
  37 #include <stdio.h>
  38 #include <string>
  39 #include <sys/ptrace.h>
  40 #include <sys/socket.h>
  41 #include <sys/types.h>
  42 #include <sys/wait.h>
  43 #include <unistd.h>
  44
  45 #include "printer.hh"
  46 #include "tracechild.hh"
  47
  48 using namespace std;
  49
  50 void printUsage(const char * execName)
  51 {
  52     cout << execName << " <options> -- <command> <arguments>" << endl;
  53     cout << "options:" << endl;
  54     cout << "         -h          print this help" << endl;
  55     cout << "         --host      remote m5 host to connect to" << endl;
  56     cout << "         -r          print register names" << endl;
  57     cout << "         -i          print initial stack state" << endl;
  58     cout << "         -nt         don't print an instruction trace" << endl;
  59 }
  60
  61 int main(int argc, char * argv[], char * envp[])
  62 {
  63     TraceChild * child = genTraceChild();
  64     string args;
  65     int startProgramArgs;
  66
  67     //Parse the command line arguments
  68     bool printInitial = false;
  69     bool printTrace = true;
  70     string host = "localhost";
  71
  72     if (argc == 1) {
  73         printUsage(argv[0]);
  74         return 0;
  75     }
  76     for(int x = 1; x < argc; x++)
  77     {
  78         if(!strcmp(argv[x], "-h"))
  79         {
  80             printUsage(argv[0]);
  81             return 0;
  82         }
  83         if(!strcmp(argv[x], "--host"))
  84         {
  85             x++;
  86             if(x >= argc)
  87             {
  88                 cerr << "Incorrect usage.\n" << endl;
  89                 printUsage(argv[0]);
  90                 return 1;
  91             }
  92             host = argv[x];
  93         }
  94         else if(!strcmp(argv[x], "-r"))
  95         {
  96             cout << "Legal register names:" << endl;
  97             int numRegs = child->getNumRegs();
  98             for(unsigned int x = 0; x < numRegs; x++)
  99             {
 100                 cout << "\t" << child->getRegName(x) << endl;
 101             }
 102             return 0;
 103         }
 104         else if(!strcmp(argv[x], "-i"))
 105         {
 106             printInitial = true;
 107         }
 108         else if(!strcmp(argv[x], "-nt"))
 109         {
 110             printTrace = false;
 111         }
 112         else if(!strcmp(argv[x], "--"))
 113         {
 114             x++;
 115             if(x >= argc)
 116             {
 117                 cerr << "Incorrect usage.\n" << endl;
 118                 printUsage(argv[0]);
 119                 return 1;
 120             }
 121             startProgramArgs = x;
 122             break;
 123         }
 124         else
 125         {
 126             cerr << "Incorrect usage.\n" << endl;
 127             printUsage(argv[0]);
 128             return 1;
 129         }
 130     }
 131     if(!child->startTracing(argv[startProgramArgs],
 132                 argv + startProgramArgs))
 133     {
 134         cerr << "Couldn't start target program" << endl;
 135         return 1;
 136     }
 137     child->step();
 138     if(printInitial)
 139     {
 140         child->outputStartState(cout);
 141     }
 142     if(printTrace)
 143     {
 144         // Connect to m5
 145         bool portSet = false;
 146         int port;
 147         int sock = socket(AF_INET, SOCK_STREAM, 0);
 148         if(sock < 0)
 149         {
 150             cerr << "Error opening socket! " << strerror(errno) << endl;
 151             return 1;
 152         }
 153         struct hostent *server;
 154         server = gethostbyname(host.c_str());
 155         if(!server)
 156         {
 157             cerr << "Couldn't get host ip! " << strerror(errno) << endl;
 158             return 1;
 159         }
 160         struct sockaddr_in serv_addr;
 161         bzero((char *)&serv_addr, sizeof(serv_addr));
 162         serv_addr.sin_family = AF_INET;
 163         bcopy((char *)server->h_addr,
 164                 (char *)&serv_addr.sin_addr.s_addr,
 165                 server->h_length);
 166         serv_addr.sin_port = htons(8000);
 167         if(connect(sock, (sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
 168         {
 169             cerr << "Couldn't connect to server! " << strerror(errno) << endl;
 170             return 1;
 171         }
 172         while(child->isTracing())
 173         {
 174                 if(!child->sendState(sock))
 175                     break;
 176                 child->step();
 177         }
 178     }
 179     if(!child->stopTracing())
 180     {
 181             cerr << "Couldn't stop child" << endl;
 182             return 1;
 183     }
 184     return 0;
 185 }
 186