xref: /gem5/src/sim/debug.cc

/*
 * Copyright (c) 2003-2005 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: Nathan Binkert
 *          Steve Reinhardt
 */

#include <string>
#include <vector>

#include "base/debug.hh"
#include "sim/debug.hh"
#include "sim/eventq_impl.hh"
#include "sim/global_event.hh"
#include "sim/sim_events.hh"
#include "sim/sim_exit.hh"
#include "cpu/pc_event.hh"
#include "sim/system.hh"

using namespace std;

//
// Debug event: place a breakpoint on the process function and
// schedule the event to break at a particular cycle
//
struct DebugBreakEvent : public GlobalEvent
{
    DebugBreakEvent(Tick when);
    void process();     // process event
    virtual const char *description() const;
};

//
// constructor: schedule at specified time
//
DebugBreakEvent::DebugBreakEvent(Tick when)
    : GlobalEvent(when, Debug_Break_Pri, AutoDelete)
{
}

//
// handle debug event: set debugger breakpoint on this function
//
void
DebugBreakEvent::process()
{
    Debug::breakpoint();
}


const char *
DebugBreakEvent::description() const
{
    return "debug breakpoint";
}

//
// handy function to schedule DebugBreakEvent on main event queue
// (callable from debugger)
//
void
schedBreak(Tick when)
{
    new DebugBreakEvent(when);
    warn("need to stop all queues");
}

void
schedRelBreak(Tick delta)
{
    schedBreak(curTick() + delta);
}

void
breakAtKernelFunction(const char* funcName)
{
    System* curSystem = System::systemList[0];
    curSystem->addKernelFuncEvent<BreakPCEvent>(funcName,
                                                "GDB scheduled break", true);
}

///
/// Function to cause the simulator to take a checkpoint from the debugger
///
void
takeCheckpoint(Tick when)
{
    if (!when)
        when = curTick() + 1;
    exitSimLoop("checkpoint", 0, when, 0);
}

void
eventqDump()
{
    for (uint32_t i = 0; i < numMainEventQueues; ++i) {
        mainEventQueue[i]->dump();
    }
}

int remote_gdb_base_port = 7000;

int
getRemoteGDBPort()
{
    return remote_gdb_base_port;
}

// Set remote GDB base port.  0 means disable remote GDB.
// Callable from python.
void
setRemoteGDBPort(int port)
{
    remote_gdb_base_port = port;
}