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/*
* ucdebugging.cc - Debugging-related functions for usecode
*
* Copyright (C) 2002 The Exult Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ucdebugging.h"
#include "ucinternal.h"
#include "stackframe.h"
#include "ucfunction.h"
#include "utils.h"
#include "servemsg.h"
#include "debugmsg.h"
Breakpoint::Breakpoint(bool once)
{
this->once = once;
id = Breakpoints::getNewID();
}
AnywhereBreakpoint::AnywhereBreakpoint()
: Breakpoint(true)
{ }
LocationBreakpoint::LocationBreakpoint(int functionid, int ip, bool once)
: Breakpoint(once)
{
this->functionid = functionid;
this->ip = ip;
}
bool LocationBreakpoint::check(Stack_frame *frame) const
{
return (frame->function->id == functionid) &&
((int)(frame->ip - frame->code) == ip);
}
void LocationBreakpoint::serialize(int fd) const
{
unsigned char d[13];
d[0] = (unsigned char)(Exult_server::dbg_set_location_bp);
unsigned char *dptr = &d[1];
Write4(dptr, functionid);
Write4(dptr, ip);
Write4(dptr, id);
Exult_server::Send_data(fd, Exult_server::usecode_debugging, d, 13);
}
StepoverBreakpoint::StepoverBreakpoint(Stack_frame* frame)
: Breakpoint(true)
{
call_chain = frame->call_chain;
call_depth = frame->call_depth;
}
bool StepoverBreakpoint::check(Stack_frame *frame) const
{
return ((frame->call_chain == call_chain &&
frame->call_depth <= call_depth) ||
(frame->call_chain < call_chain));
}
FinishBreakpoint::FinishBreakpoint(Stack_frame* frame)
: Breakpoint(true)
{
call_chain = frame->call_chain;
call_depth = frame->call_depth;
}
bool FinishBreakpoint::check(Stack_frame *frame) const
{
return ((frame->call_chain == call_chain &&
frame->call_depth < call_depth) ||
(frame->call_chain < call_chain));
}
int Breakpoints::lastID = 0;
Breakpoints::Breakpoints()
{
}
Breakpoints::~Breakpoints()
{
std::list<Breakpoint*>::iterator iter;
// clear queue
for (iter = breaks.begin(); iter != breaks.end(); ++iter)
{
delete (*iter);
}
}
// returns ID of a (any) breakpoint encountered, or -1 if no breakpoints
int Breakpoints::check(Stack_frame* frame)
{
// check all breakpoints (always check all of them, even if match found)
// and delete the matching ones with 'once' set
// question: do we really want to delete a breakpoint (with once set)
// as soon as it is triggered? (or wait a while until it has been
// processed properly?)
// also, it might be necessary to return a list of all matching and/or
// deleted breakpoints
// OTOH, which 'once' breakpoint is hit is generally not interesting,
// and also, only one of these will be set, usually.
int breakID = -1;
std::list<Breakpoint*>::iterator iter;
for (iter = breaks.begin(); iter != breaks.end(); ++iter)
{
if ((*iter)->check(frame)) {
breakID = (*iter)->id;
if ((*iter)->once) {
delete (*iter);
(*iter) = 0;
}
}
}
breaks.remove((Breakpoint*)0); // delete all NULLs from the list
return breakID;
}
void Breakpoints::add(Breakpoint* breakpoint)
{
breaks.remove(breakpoint); // avoid double occurences
breaks.push_back(breakpoint);
}
void Breakpoints::remove(Breakpoint* breakpoint)
{
breaks.remove(breakpoint);
}
bool Breakpoints::remove(int id)
{
bool found = false;
std::list<Breakpoint*>::iterator iter;
for (iter = breaks.begin(); iter != breaks.end(); ++iter)
{
if ((*iter)->id == id) {
found = true;
delete (*iter);
(*iter) = 0;
}
}
breaks.remove((Breakpoint*)0); // delete all NULLs from the list
return found;
}
void Breakpoints::transmit(int fd)
{
std::list<Breakpoint*>::iterator iter;
for (iter = breaks.begin(); iter != breaks.end(); ++iter)
(*iter)->serialize(fd);
}
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