src/cpu/thread_context.cc

/*
 * Copyright (c) 2006 The Regents of The University of Michigan
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met: redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer;
 * redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution;
 * neither the name of the copyright holders nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * Authors: Kevin Lim
 */

#include "base/misc.hh"
#include "base/trace.hh"
#include "cpu/thread_context.hh"

void
ThreadContext::compare(ThreadContext *one, ThreadContext *two)
{
    DPRINTF(Context, "Comparing thread contexts\n");

    // First loop through the integer registers.
    for (int i = 0; i < TheISA::NumIntRegs; ++i) {
        TheISA::IntReg t1 = one->readIntReg(i);
        TheISA::IntReg t2 = two->readIntReg(i);
        if (t1 != t2)
            panic("Int reg idx %d doesn't match, one: %#x, two: %#x",
                  i, t1, t2);
    }

    // Then loop through the floating point registers.
    for (int i = 0; i < TheISA::NumFloatRegs; ++i) {
        TheISA::FloatRegBits t1 = one->readFloatRegBits(i);
        TheISA::FloatRegBits t2 = two->readFloatRegBits(i);
        if (t1 != t2)
            panic("Float reg idx %d doesn't match, one: %#x, two: %#x",
                  i, t1, t2);
    }
#if FULL_SYSTEM
    for (int i = 0; i < TheISA::NumMiscRegs; ++i) {
        TheISA::MiscReg t1 = one->readMiscRegNoEffect(i);
        TheISA::MiscReg t2 = two->readMiscRegNoEffect(i);
        if (t1 != t2)
            panic("Misc reg idx %d doesn't match, one: %#x, two: %#x",
                  i, t1, t2);
    }
#endif

    Addr pc1 = one->readPC();
    Addr pc2 = two->readPC();
    if (pc1 != pc2)
        panic("PCs doesn't match, one: %#x, two: %#x", pc1, pc2);

    Addr npc1 = one->readNextPC();
    Addr npc2 = two->readNextPC();
    if (npc1 != npc2)
        panic("NPCs doesn't match, one: %#x, two: %#x", npc1, npc2);

    int id1 = one->readCpuId();
    int id2 = two->readCpuId();
    if (id1 != id2)
        panic("CPU ids don't match, one: %d, two: %d", id1, id2);
}