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