pc_event.cc revision 8670:aae12ce9f34c
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 <algorithm> 33#include <map> 34#include <string> 35#include <utility> 36 37#include "base/debug.hh" 38#include "base/trace.hh" 39#include "config/full_system.hh" 40#include "cpu/base.hh" 41#include "cpu/pc_event.hh" 42#include "cpu/thread_context.hh" 43#include "debug/PCEvent.hh" 44#include "sim/core.hh" 45#include "sim/system.hh" 46 47using namespace std; 48 49PCEventQueue::PCEventQueue() 50{} 51 52PCEventQueue::~PCEventQueue() 53{} 54 55bool 56PCEventQueue::remove(PCEvent *event) 57{ 58 int removed = 0; 59 range_t range = equal_range(event); 60 for (iterator i = range.first; i != range.second; ++i) { 61 if (*i == event) { 62 DPRINTF(PCEvent, "PC based event removed at %#x: %s\n", 63 event->pc(), event->descr()); 64 pc_map.erase(i); 65 ++removed; 66 } 67 } 68 69 return removed > 0; 70} 71 72bool 73PCEventQueue::schedule(PCEvent *event) 74{ 75 pc_map.push_back(event); 76 sort(pc_map.begin(), pc_map.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 84bool 85PCEventQueue::doService(ThreadContext *tc) 86{ 87 // This will fail to break on Alpha PALcode addresses, but that is 88 // a rare use case. 89 Addr pc = tc->instAddr(); 90 int serviced = 0; 91 range_t range = equal_range(pc); 92 for (iterator i = range.first; i != range.second; ++i) { 93 // Make sure that the pc wasn't changed as the side effect of 94 // another event. This for example, prevents two invocations 95 // of the SkipFuncEvent. Maybe we should have separate PC 96 // event queues for each processor? 97 if (pc != tc->instAddr()) 98 continue; 99 100 DPRINTF(PCEvent, "PC based event serviced at %#x: %s\n", 101 (*i)->pc(), (*i)->descr()); 102 103 (*i)->process(tc); 104 ++serviced; 105 } 106 107 return serviced > 0; 108} 109 110void 111PCEventQueue::dump() const 112{ 113 const_iterator i = pc_map.begin(); 114 const_iterator e = pc_map.end(); 115 116 for (; i != e; ++i) 117 cprintf("%d: event at %#x: %s\n", curTick(), (*i)->pc(), 118 (*i)->descr()); 119} 120 121PCEventQueue::range_t 122PCEventQueue::equal_range(Addr pc) 123{ 124 return std::equal_range(pc_map.begin(), pc_map.end(), pc, MapCompare()); 125} 126 127BreakPCEvent::BreakPCEvent(PCEventQueue *q, const std::string &desc, Addr addr, 128 bool del) 129 : PCEvent(q, desc, addr), remove(del) 130{ 131} 132 133void 134BreakPCEvent::process(ThreadContext *tc) 135{ 136 StringWrap name(tc->getCpuPtr()->name() + ".break_event"); 137 DPRINTFN("break event %s triggered\n", descr()); 138 Debug::breakpoint(); 139 if (remove) 140 delete this; 141} 142 143#if FULL_SYSTEM 144void 145sched_break_pc_sys(System *sys, Addr addr) 146{ 147 new BreakPCEvent(&sys->pcEventQueue, "debug break", addr, true); 148} 149 150void 151sched_break_pc(Addr addr) 152{ 153 for (vector<System *>::iterator sysi = System::systemList.begin(); 154 sysi != System::systemList.end(); ++sysi) { 155 sched_break_pc_sys(*sysi, addr); 156 } 157 158} 159#endif 160