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 "tracechild.hh"
  46
  47 using namespace std;
  48
  49 void
  50 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
  62 main(int argc, char * argv[], char * envp[])
  63 {
  64     TraceChild * child = genTraceChild();
  65     string args;
  66     int startProgramArgs;
  67
  68     //Parse the command line arguments
  69     bool printInitial = false;
  70     bool printTrace = true;
  71     string host = "localhost";
  72
  73     if (argc == 1) {
  74         printUsage(argv[0]);
  75         return 0;
  76     }
  77     for (int x = 1; x < argc; x++) {
  78         if (!strcmp(argv[x], "-h")) {
  79             printUsage(argv[0]);
  80             return 0;
  81         }
  82         if (!strcmp(argv[x], "--host")) {
  83             x++;
  84             if (x >= argc) {
  85                 cerr << "Incorrect usage.\n" << endl;
  86                 printUsage(argv[0]);
  87                 return 1;
  88             }
  89             host = argv[x];
  90         } else if (!strcmp(argv[x], "-r")) {
  91             cout << "Legal register names:" << endl;
  92             int numRegs = child->getNumRegs();
  93             for (unsigned int x = 0; x < numRegs; x++)
  94                 cout << "\t" << child->getRegName(x) << endl;
  95             return 0;
  96         } else if (!strcmp(argv[x], "-i")) {
  97             printInitial = true;
  98         } else if (!strcmp(argv[x], "-nt")) {
  99             printTrace = false;
 100         } else if (!strcmp(argv[x], "--")) {
 101             x++;
 102             if (x >= argc) {
 103                 cerr << "Incorrect usage.\n" << endl;
 104                 printUsage(argv[0]);
 105                 return 1;
 106             }
 107             startProgramArgs = x;
 108             break;
 109         } else {
 110             cerr << "Incorrect usage.\n" << endl;
 111             printUsage(argv[0]);
 112             return 1;
 113         }
 114     }
 115     if (!child->startTracing(argv[startProgramArgs],
 116                 argv + startProgramArgs)) {
 117         cerr << "Couldn't start target program" << endl;
 118         return 1;
 119     }
 120     child->step();
 121     if (printInitial)
 122         child->outputStartState(cout);
 123     if (printTrace) {
 124         // Connect to m5
 125         bool portSet = false;
 126         int port;
 127         int sock = socket(AF_INET, SOCK_STREAM, 0);
 128         if (sock < 0) {
 129             cerr << "Error opening socket! " << strerror(errno) << endl;
 130             return 1;
 131         }
 132         struct hostent *server;
 133         server = gethostbyname(host.c_str());
 134         if (!server) {
 135             cerr << "Couldn't get host ip! " << strerror(errno) << endl;
 136             return 1;
 137         }
 138         struct sockaddr_in serv_addr;
 139         bzero((char *)&serv_addr, sizeof(serv_addr));
 140         serv_addr.sin_family = AF_INET;
 141         bcopy((char *)server->h_addr,
 142                 (char *)&serv_addr.sin_addr.s_addr,
 143                 server->h_length);
 144         serv_addr.sin_port = htons(8000);
 145         if (connect(sock, (sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
 146             cerr << "Couldn't connect to server! " << strerror(errno) << endl;
 147             return 1;
 148         }
 149         while (child->isTracing()) {
 150             if (!child->sendState(sock))
 151                 break;
 152             child->step();
 153         }
 154     }
 155     if (!child->stopTracing()) {
 156         cerr << "Couldn't stop child" << endl;
 157         return 1;
 158     }
 159     return 0;
 160 }
 161