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/*
* 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 <sys/types.h>
#include <signal.h>
#include <unistd.h>
#include <string>
#include <vector>
#include "sim/debug.hh"
#include "sim/eventq.hh"
#include "sim/param.hh"
#include "sim/sim_events.hh"
using namespace std;
void
debug_break()
{
#ifndef NDEBUG
kill(getpid(), SIGTRAP);
#else
cprintf("debug_break suppressed, compiled with NDEBUG\n");
#endif
}
//
// Debug event: place a breakpoint on the process function and
// schedule the event to break at a particular cycle
//
class DebugBreakEvent : public Event
{
public:
DebugBreakEvent(EventQueue *q, Tick _when);
void process(); // process event
virtual const char *description();
};
//
// constructor: schedule at specified time
//
DebugBreakEvent::DebugBreakEvent(EventQueue *q, Tick _when)
: Event(q, Debug_Break_Pri)
{
setFlags(AutoDelete);
schedule(_when);
}
//
// handle debug event: set debugger breakpoint on this function
//
void
DebugBreakEvent::process()
{
debug_break();
}
const char *
DebugBreakEvent::description()
{
return "debug break";
}
//
// Parameter context for global debug options
//
class DebugContext : public ParamContext
{
public:
DebugContext(const string &_iniSection)
: ParamContext(_iniSection) {}
void checkParams();
};
DebugContext debugParams("debug");
VectorParam<Tick> break_cycles(&debugParams, "break_cycles",
"cycle(s) to create breakpoint events");
void
DebugContext::checkParams()
{
if (break_cycles.isValid()) {
vector<Tick> &cycles = break_cycles;
vector<Tick>::iterator i = cycles.begin();
vector<Tick>::iterator end = cycles.end();
for (; i < end; ++i)
new DebugBreakEvent(&mainEventQueue, *i);
}
}
//
// handy function to schedule DebugBreakEvent on main event queue
// (callable from debugger)
//
extern "C" void sched_break_cycle(Tick when)
{
new DebugBreakEvent(&mainEventQueue, when);
}
extern "C" void eventq_dump()
{
mainEventQueue.dump();
}
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