pc_event.cc

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/*
 * Copyright (c) 2002-2005 The Regents of The University of Michigan
 * All rights reserved.
 *
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 * 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
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 */
 
#include "cpu/pc_event.hh"
 
#include <algorithm>
#include <string>
#include <utility>
 
#include "base/debug.hh"
#include "base/trace.hh"
#include "debug/PCEvent.hh"
#include "sim/cur_tick.hh"
#include "sim/system.hh"
 
namespace gem5
{
 
PCEventQueue::PCEventQueue()
{}
 
PCEventQueue::~PCEventQueue()
{}
 
bool
PCEventQueue::remove(PCEvent *event)
{
    int removed = 0;
    range_t range = equal_range(event);
    iterator i = range.first;
    while (i != range.second && i != pcMap.end()) {
        if (*i == event) {
            DPRINTF(PCEvent, "PC based event removed at %#x: %s\n",
                    event->pc(), event->descr());
            i = pcMap.erase(i);
            ++removed;
        } else {
            i++;
        }
    }
 
    return removed > 0;
}
 
bool
PCEventQueue::schedule(PCEvent *event)
{
    pcMap.push_back(event);
    std::sort(pcMap.begin(), pcMap.end(), MapCompare());
 
    DPRINTF(PCEvent, "PC based event scheduled for %#x: %s\n",
            event->pc(), event->descr());
 
    return true;
}
 
bool
PCEventQueue::doService(Addr pc, ThreadContext *tc)
{
    // Using the raw PC address will fail to break on Alpha PALcode addresses,
    // but that is a rare use case.
    int serviced = 0;
    range_t range = equal_range(pc);
    for (iterator i = range.first; i != range.second; ++i) {
        DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n",
                (*i)->pc(), (*i)->descr());
 
        (*i)->process(tc);
        ++serviced;
    }
 
    return serviced > 0;
}
 
void
PCEventQueue::dump() const
{
    const_iterator i = pcMap.begin();
    const_iterator e = pcMap.end();
 
    for (; i != e; ++i)
        cprintf("%d: event at %#x: %s\n", curTick(), (*i)->pc(),
                (*i)->descr());
}
 
PCEventQueue::range_t
PCEventQueue::equal_range(Addr pc)
{
    return std::equal_range(pcMap.begin(), pcMap.end(), pc, MapCompare());
}
 
BreakPCEvent::BreakPCEvent(PCEventScope *s, const std::string &desc, Addr addr,
                           bool del)
    : PCEvent(s, desc, addr), remove(del)
{
}
 
void
BreakPCEvent::process(ThreadContext *tc)
{
    StringWrap name("break_event");
    DPRINTFN("break event %s triggered\n", descr());
    debug::breakpoint();
    if (remove)
        delete this;
}
 
PanicPCEvent::PanicPCEvent(PCEventScope *s, const std::string &desc, Addr pc)
    : PCEvent(s, desc, pc)
{
}
 
void
PanicPCEvent::process(ThreadContext *tc)
{
    StringWrap name("panic_event");
    panic(descr());
}
 
} // namespace gem5