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