src/cpu/pc_event.cc

   1 /*
   2  * Copyright (c) 2002-2005 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: Nathan Binkert
  29  *          Steve Reinhardt
  30  */
  31
  32 #include "cpu/pc_event.hh"
  33
  34 #include <algorithm>
  35 #include <string>
  36 #include <utility>
  37
  38 #include "base/debug.hh"
  39 #include "base/trace.hh"
  40 #include "debug/PCEvent.hh"
  41 #include "sim/core.hh"
  42 #include "sim/system.hh"
  43
  44 using namespace std;
  45
  46 PCEventQueue::PCEventQueue()
  47 {}
  48
  49 PCEventQueue::~PCEventQueue()
  50 {}
  51
  52 bool
  53 PCEventQueue::remove(PCEvent *event)
  54 {
  55     int removed = 0;
  56     range_t range = equal_range(event);
  57     iterator i = range.first;
  58     while (i != range.second && i != pcMap.end()) {
  59         if (*i == event) {
  60             DPRINTF(PCEvent, "PC based event removed at %#x: %s\n",
  61                     event->pc(), event->descr());
  62             i = pcMap.erase(i);
  63             ++removed;
  64         } else {
  65             i++;
  66         }
  67     }
  68
  69     return removed > 0;
  70 }
  71
  72 bool
  73 PCEventQueue::schedule(PCEvent *event)
  74 {
  75     pcMap.push_back(event);
  76     sort(pcMap.begin(), pcMap.end(), MapCompare());
  77
  78     DPRINTF(PCEvent, "PC based event scheduled for %#x: %s\n",
  79             event->pc(), event->descr());
  80
  81     return true;
  82 }
  83
  84 bool
  85 PCEventQueue::doService(Addr pc, ThreadContext *tc)
  86 {
  87     // Using the raw PC address will fail to break on Alpha PALcode addresses,
  88     // but that is a rare use case.
  89     int serviced = 0;
  90     range_t range = equal_range(pc);
  91     for (iterator i = range.first; i != range.second; ++i) {
  92         DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n",
  93                 (*i)->pc(), (*i)->descr());
  94
  95         (*i)->process(tc);
  96         ++serviced;
  97     }
  98
  99     return serviced > 0;
 100 }
 101
 102 void
 103 PCEventQueue::dump() const
 104 {
 105     const_iterator i = pcMap.begin();
 106     const_iterator e = pcMap.end();
 107
 108     for (; i != e; ++i)
 109         cprintf("%d: event at %#x: %s\n", curTick(), (*i)->pc(),
 110                 (*i)->descr());
 111 }
 112
 113 PCEventQueue::range_t
 114 PCEventQueue::equal_range(Addr pc)
 115 {
 116     return std::equal_range(pcMap.begin(), pcMap.end(), pc, MapCompare());
 117 }
 118
 119 BreakPCEvent::BreakPCEvent(PCEventScope *s, const std::string &desc, Addr addr,
 120                            bool del)
 121     : PCEvent(s, desc, addr), remove(del)
 122 {
 123 }
 124
 125 void
 126 BreakPCEvent::process(ThreadContext *tc)
 127 {
 128     StringWrap name("break_event");
 129     DPRINTFN("break event %s triggered\n", descr());
 130     Debug::breakpoint();
 131     if (remove)
 132         delete this;
 133 }
 134
 135 PanicPCEvent::PanicPCEvent(PCEventScope *s, const std::string &desc, Addr pc)
 136     : PCEvent(s, desc, pc)
 137 {
 138 }
 139
 140 void
 141 PanicPCEvent::process(ThreadContext *tc)
 142 {
 143     StringWrap name("panic_event");
 144     panic(descr());
 145 }