util/statetrace/tracechild.hh

   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 #ifndef TRACECHILD_HH
  32 #define TRACECHILD_HH
  33
  34 #include "regstate.hh"
  35
  36 class TraceChild : public RegState
  37 {
  38 protected:
  39         int pid;
  40         uint64_t instructions;
  41         bool tracing;
  42 public:
  43         TraceChild() : tracing(false), instructions(0)
  44         {;}
  45         virtual bool startTracing(const char * pathToFile,
  46                 char * const argv[]);
  47         virtual bool stopTracing();
  48         virtual bool step();
  49         virtual uint64_t getPC() = 0;
  50         virtual uint64_t getSP() = 0;
  51         virtual std::ostream & outputStartState(std::ostream & os) = 0;
  52         int getPid()
  53         {
  54             return pid;
  55         }
  56         bool isTracing()
  57         {
  58                 return tracing;
  59         }
  60 protected:
  61         bool ptraceSingleStep();
  62         bool doWait();
  63 };
  64
  65 TraceChild * genTraceChild();
  66
  67 #endif