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 << "         -i          print initial stack state" << endl;
  57     cout << "         -nt         don't print an instruction trace" << endl;
  58 }
  59
  60 int
  61 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         if (!strcmp(argv[x], "-h")) {
  78             printUsage(argv[0]);
  79             return 0;
  80         }
  81         if (!strcmp(argv[x], "--host")) {
  82             x++;
  83             if (x >= argc) {
  84                 cerr << "Incorrect usage.\n" << endl;
  85                 printUsage(argv[0]);
  86                 return 1;
  87             }
  88             host = argv[x];
  89         } else if (!strcmp(argv[x], "-i")) {
  90             printInitial = true;
  91         } else if (!strcmp(argv[x], "-nt")) {
  92             printTrace = false;
  93         } else if (!strcmp(argv[x], "--")) {
  94             x++;
  95             if (x >= argc) {
  96                 cerr << "Incorrect usage.\n" << endl;
  97                 printUsage(argv[0]);
  98                 return 1;
  99             }
 100             startProgramArgs = x;
 101             break;
 102         } else {
 103             cerr << "Incorrect usage.\n" << endl;
 104             printUsage(argv[0]);
 105             return 1;
 106         }
 107     }
 108     if (!child->startTracing(argv[startProgramArgs],
 109                 argv + startProgramArgs)) {
 110         cerr << "Couldn't start target program" << endl;
 111         return 1;
 112     }
 113     child->step();
 114     if (printInitial)
 115         child->outputStartState(cout);
 116     if (printTrace) {
 117         // Connect to m5
 118         bool portSet = false;
 119         int port;
 120         int sock = socket(AF_INET, SOCK_STREAM, 0);
 121         if (sock < 0) {
 122             cerr << "Error opening socket! " << strerror(errno) << endl;
 123             return 1;
 124         }
 125         struct hostent *server;
 126         server = gethostbyname(host.c_str());
 127         if (!server) {
 128             cerr << "Couldn't get host ip! " << strerror(errno) << endl;
 129             return 1;
 130         }
 131         struct sockaddr_in serv_addr;
 132         bzero((char *)&serv_addr, sizeof(serv_addr));
 133         serv_addr.sin_family = AF_INET;
 134         bcopy((char *)server->h_addr,
 135                 (char *)&serv_addr.sin_addr.s_addr,
 136                 server->h_length);
 137         serv_addr.sin_port = htons(8000);
 138         if (connect(sock, (sockaddr *)&serv_addr, sizeof(serv_addr)) < 0) {
 139             cerr << "Couldn't connect to server! " << strerror(errno) << endl;
 140             return 1;
 141         }
 142         while (child->isTracing()) {
 143             if (!child->sendState(sock))
 144                 break;
 145             child->step();
 146         }
 147     }
 148     if (!child->stopTracing()) {
 149         cerr << "Couldn't stop child" << endl;
 150         return 1;
 151     }
 152     return 0;
 153 }
 154