src/cpu/thread_context.cc

   1 /*
   2  * Copyright (c) 2006 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: Kevin Lim
  29  */
  30
  31 #include "base/misc.hh"
  32 #include "base/trace.hh"
  33 #include "config/the_isa.hh"
  34 #include "cpu/thread_context.hh"
  35
  36 void
  37 ThreadContext::compare(ThreadContext *one, ThreadContext *two)
  38 {
  39     DPRINTF(Context, "Comparing thread contexts\n");
  40
  41     // First loop through the integer registers.
  42     for (int i = 0; i < TheISA::NumIntRegs; ++i) {
  43         TheISA::IntReg t1 = one->readIntReg(i);
  44         TheISA::IntReg t2 = two->readIntReg(i);
  45         if (t1 != t2)
  46             panic("Int reg idx %d doesn't match, one: %#x, two: %#x",
  47                   i, t1, t2);
  48     }
  49
  50     // Then loop through the floating point registers.
  51     for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
  52         TheISA::FloatRegBits t1 = one->readFloatRegBits(i);
  53         TheISA::FloatRegBits t2 = two->readFloatRegBits(i);
  54         if (t1 != t2)
  55             panic("Float reg idx %d doesn't match, one: %#x, two: %#x",
  56                   i, t1, t2);
  57     }
  58 #if FULL_SYSTEM
  59     for (int i = 0; i < TheISA::NumMiscRegs; ++i) {
  60         TheISA::MiscReg t1 = one->readMiscRegNoEffect(i);
  61         TheISA::MiscReg t2 = two->readMiscRegNoEffect(i);
  62         if (t1 != t2)
  63             panic("Misc reg idx %d doesn't match, one: %#x, two: %#x",
  64                   i, t1, t2);
  65     }
  66 #endif
  67
  68     Addr pc1 = one->readPC();
  69     Addr pc2 = two->readPC();
  70     if (pc1 != pc2)
  71         panic("PCs doesn't match, one: %#x, two: %#x", pc1, pc2);
  72
  73     Addr npc1 = one->readNextPC();
  74     Addr npc2 = two->readNextPC();
  75     if (npc1 != npc2)
  76         panic("NPCs doesn't match, one: %#x, two: %#x", npc1, npc2);
  77
  78     int id1 = one->cpuId();
  79     int id2 = two->cpuId();
  80     if (id1 != id2)
  81         panic("CPU ids don't match, one: %d, two: %d", id1, id2);
  82
  83     id1 = one->contextId();
  84     id2 = two->contextId();
  85     if (id1 != id2)
  86         panic("Context ids don't match, one: %d, two: %d", id1, id2);
  87
  88
  89 }