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 <iostream>
  32 #include <fstream>
  33 #include <string>
  34 #include <sys/types.h>
  35 #include <sys/wait.h>
  36 #include <sys/ptrace.h>
  37 #include <unistd.h>
  38
  39 #include "tracechild.hh"
  40 #include "printer.hh"
  41
  42 using namespace std;
  43
  44 void printUsage(const char * execName)
  45 {
  46         cout << execName << " -f <output format file> | -h | -r -- <command> <arguments>" << endl;
  47 }
  48
  49 int main(int argc, char * argv[], char * envp[])
  50 {
  51         TraceChild * child = genTraceChild();
  52         NestingPrinter printer(child);
  53         string args;
  54         int startProgramArgs;
  55
  56         //Parse the command line arguments
  57         bool formatStringSet = false;
  58         bool printInitial = false;
  59         bool printTrace = true;
  60         string format;
  61         for(int x = 1; x < argc; x++)
  62         {
  63                 if(!strcmp(argv[x], "-f"))
  64                 {
  65                         if(formatStringSet)
  66                         {
  67                                 cerr << "Attempted to set format twice!"
  68                                         << endl;
  69                                 printUsage(argv[0]);
  70                                 return 1;
  71                         }
  72                         formatStringSet = true;
  73                         x++;
  74                         if(x >= argc)
  75                         {
  76                                 cerr << "Incorrect usage.\n" << endl;
  77                                 printUsage(argv[0]);
  78                                 return 1;
  79                         }
  80                         ifstream formatFile(argv[x]);
  81                         if(!formatFile)
  82                         {
  83                                 cerr << "Problem opening file "
  84                                         << argv[x] << "." << endl;
  85                                 return 1;
  86                         }
  87                         format = "";
  88                         while(formatFile)
  89                         {
  90                                 string line;
  91                                 getline(formatFile, line);
  92                                 if(formatFile.eof())
  93                                 {
  94                                         format += line;
  95                                         break;
  96                                 }
  97                                 if(!formatFile)
  98                                 {
  99                                         cerr << "Problem reading from file "
 100                                                 << argv[x] << "." << endl;
 101                                         return 1;
 102                                 }
 103                                 format += line + '\n';
 104                         }
 105                 }
 106                 else if(!strcmp(argv[x], "-h"))
 107                 {
 108                         printUsage(argv[0]);
 109                         return 0;
 110                 }
 111                 else if(!strcmp(argv[x], "-r"))
 112                 {
 113                         cout << "Legal register names:" << endl;
 114                         int numRegs = child->getNumRegs();
 115                         for(unsigned int x = 0; x < numRegs; x++)
 116                         {
 117                                 cout << "\t" << child->getRegName(x) << endl;
 118                         }
 119                         return 0;
 120                 }
 121                 else if(!strcmp(argv[x], "-i"))
 122                 {
 123                     printInitial = true;
 124                 }
 125                 else if(!strcmp(argv[x], "-nt"))
 126                 {
 127                     printTrace = false;
 128                 }
 129                 else if(!strcmp(argv[x], "--"))
 130                 {
 131                         x++;
 132                         if(x >= argc)
 133                         {
 134                                 cerr << "Incorrect usage.\n" << endl;
 135                                 printUsage(argv[0]);
 136                                 return 1;
 137                         }
 138                         startProgramArgs = x;
 139                         break;
 140                 }
 141                 else
 142                 {
 143                         cerr << "Incorrect usage.\n" << endl;
 144                         printUsage(argv[0]);
 145                         return 1;
 146                 }
 147         }
 148         /*for(unsigned int x = startProgramArgs; x < argc; x++)
 149         {
 150             cout << "Adding argument " << argv[x];
 151             args += string(" ") + argv[x];
 152         }*/
 153         if(!child->startTracing(argv[startProgramArgs],
 154                     argv + startProgramArgs))
 155         {
 156                 cerr << "Couldn't start target program" << endl;
 157                 return 1;
 158         }
 159         if(printInitial)
 160         {
 161             child->outputStartState(cout);
 162         }
 163         if(printTrace)
 164         {
 165             if(!formatStringSet)
 166             {
 167                     cerr << "No output format set!" << endl;
 168                     child->stopTracing();
 169                     printUsage(argv[0]);
 170                     return 1;
 171             }
 172             if(!printer.configure(format))
 173             {
 174                     cerr << "Problem in the output format" << endl;
 175                     child->stopTracing();
 176                     return 1;
 177             }
 178             child->step();
 179             while(child->isTracing())
 180             {
 181                     cout << printer;
 182                     child->step();
 183             }
 184             cout << printer;
 185         }
 186         if(!child->stopTracing())
 187         {
 188                 cerr << "Couldn't stop child" << endl;
 189                 return 1;
 190         }
 191         return 0;
 192 }
 193