void BreakpointListView::updateBreakpoint(DebuggerBreakpoint* bp)
{
BreakpointListViewItem* item = findBreakpoint(bp);
if(item)
{
item->setBreakpoint(bp);
}
}
void BreakpointListView::toggleBreakpoint(const QString& filePath, int line)
{
BreakpointListViewItem* item = findBreakpoint(filePath, line);
if(item) {
removeBreakpoint(item->breakpoint());
} else {
addBreakpoint(filePath, line);
}
}
void BreakpointListView::slotBreakpointUnmarked(QString filePath, int line) {
//note: TextEditor lines are 0 based
BreakpointListViewItem* item = findBreakpoint(filePath, line+1);
if(item) {
takeItem(item);
}
emit sigBreakpointRemoved(item->breakpoint());
delete item;
}
void BreakpointListView::removeBreakpoint(DebuggerBreakpoint* bp)
{
BreakpointListViewItem* item = findBreakpoint(bp);
if(item) {
takeItem(item);
}
emit sigBreakpointRemoved(bp);
delete item;
}
void BreakpointListView::toggleBreakpoint(const KURL& url, int line, bool enabled)
{
BreakpointListViewItem* item = findBreakpoint(url, line);
if(item)
{
removeBreakpoint(item->breakpoint());
}
else
{
addBreakpoint(url, line, enabled);
}
}
// fixBreakpoint is going to clean up the mess we made in breakpoint().
// What we are cleaning up is determined by step:
//
// Step = 0: We will restore our OpCode and do nothing else! This will
// prove useful if we ever implement the ability to disable a breakpoint.
// This also allows us to use whereAmI() without having to guess if we
// are after INT 3 or at a valid instruction.
//
// Step = 1 we will be single stepping and then resetting the break.
void fixBreakpoint(unsigned int step){
if(!step){
unsigned long breakIndex = findBreakpoint(AFTER_BREAKPOINT);
unsigned long breakAddress = breakpoints[breakIndex][0];
unsigned long opCode = breakpoints[breakIndex][1];
int i = 0;
ptrace(PTRACE_POKETEXT,child,breakAddress,opCode); // And now it is restored
struct user_regs_struct regs;
ptrace(PTRACE_GETREGS,child,NULL,®s);
--regs.eip;
ptrace(PTRACE_SETREGS,child,NULL,®s);
}
else{
unsigned long breakIndex = findBreakpoint(AT_BREAKPOINT);
if(ptrace(PTRACE_SINGLESTEP,child,NULL,NULL) != 0)
printf("ptrace error\n"); // Execute this one instruction
wait(&status);
unsigned long opCode = (breakpoints[breakIndex][1] & ~0xFF) | 0xCC;
unsigned long address = breakpoints[breakIndex][0];
ptrace(PTRACE_POKETEXT,child,address,opCode); // And now it is reset
}
}
void ScriptMachine::executeThread(SCMThread &t, int msPassed)
{
if( t.wakeCounter > 0 ) {
t.wakeCounter = std::max( t.wakeCounter - msPassed, 0 );
}
if( t.wakeCounter > 0 ) return;
bool hasDebugging = !! bpHandler;
while( t.wakeCounter == 0 ) {
auto pc = t.programCounter;
auto opcode = _file->read<SCMOpcode>(pc);
bool isNegatedConditional = ((opcode & SCM_NEGATE_CONDITIONAL_MASK) == SCM_NEGATE_CONDITIONAL_MASK);
opcode = opcode & ~SCM_NEGATE_CONDITIONAL_MASK;
ScriptFunctionMeta* foundcode;
if( ! _ops->findOpcode(opcode, &foundcode) )
{
throw IllegalInstruction(opcode, pc, t.name);
}
ScriptFunctionMeta& code = *foundcode;
pc += sizeof(SCMOpcode);
SCMParams parameters;
bool hasExtraParameters = code.arguments < 0;
auto requiredParams = std::abs(code.arguments);
for( int p = 0; p < requiredParams || hasExtraParameters; ++p ) {
auto type_r = _file->read<SCMByte>(pc);
auto type = static_cast<SCMType>(type_r);
if( type_r > 42 ) {
// for implicit strings, we need the byte we just read.
type = TString;
}
else {
pc += sizeof(SCMByte);
}
parameters.push_back(SCMOpcodeParameter { type, { 0 } });
switch(type) {
case EndOfArgList:
hasExtraParameters = false;
break;
case TInt8:
parameters.back().integer = _file->read<std::uint8_t>(pc);
pc += sizeof(SCMByte);
break;
case TInt16:
parameters.back().integer = _file->read<std::int16_t>(pc);
pc += sizeof(SCMByte) * 2;
break;
case TGlobal: {
auto v = _file->read<std::uint16_t>(pc);
parameters.back().globalPtr = globalData.data() + v; //* SCM_VARIABLE_SIZE;
if( v >= _file->getGlobalsSize() )
{
state->world->logger->error("SCM", "Global Out of bounds! "+ std::to_string(v) + " " + std::to_string(_file->getGlobalsSize()));
}
pc += sizeof(SCMByte) * 2;
}
break;
case TLocal: {
auto v = _file->read<std::uint16_t>(pc);
parameters.back().globalPtr = t.locals.data() + v * SCM_VARIABLE_SIZE;
if( v >= SCM_THREAD_LOCAL_SIZE )
{
state->world->logger->error("SCM", "Local Out of bounds!");
}
pc += sizeof(SCMByte) * 2;
}
break;
case TInt32:
parameters.back().integer = _file->read<std::uint32_t>(pc);
pc += sizeof(SCMByte) * 4;
break;
case TString:
std::copy(_file->data()+pc, _file->data()+pc+8,
parameters.back().string);
pc += sizeof(SCMByte) * 8;
break;
case TFloat16:
parameters.back().real = _file->read<std::int16_t>(pc) / 16.f;
pc += sizeof(SCMByte) * 2;
break;
default:
throw UnknownType(type, pc, t.name);
break;
};
}
ScriptArguments sca(¶meters, &t, this);
if( hasDebugging )
{
auto activeBreakpoint = findBreakpoint(t, pc);
if( activeBreakpoint || interupt )
{
interupt = false;
SCMBreakpoint bp;
bp.pc = t.programCounter;
bp.thread = &t;
bp.vm = this;
bp.function = &code;
bp.args = &sca;
bpHandler(bp);
}
}
#if RW_SCRIPT_DEBUG
if (strcmp(t.name, "EIGHT") == 0)
{
printf("% 8s %04x %04x % 25s", t.name, t.programCounter, opcode, code.signature.c_str());
for (auto& a : sca.getParameters())
{
printf(" %08x", a.integerValue());
}
printf("\n");
}
#endif
// After debugging has been completed, update the program counter
t.programCounter = pc;
if(code.function)
{
code.function(sca);
}
if(isNegatedConditional) {
t.conditionResult = !t.conditionResult;
}
// Handle conditional results for IF statements.
if( t.conditionCount > 0 && opcode != 0x00D6 ) /// @todo add conditional flag to opcodes instead of checking for 0x00D6
{
--t.conditionCount;
if ( t.conditionAND )
{
if ( t.conditionResult == false )
{
t.conditionMask = 0;
}
else
{
// t.conditionMask is already set to 0xFF by the if and opcode.
}
}
else
{
t.conditionMask = t.conditionMask || t.conditionResult;
}
t.conditionResult = (t.conditionMask != 0);
}
}
SCMOpcodeParameter p;
p.globalPtr = (t.locals.data() + 16 * sizeof ( SCMByte ) * 4);
*p.globalInteger += msPassed;
p.globalPtr = (t.locals.data() + 17 * sizeof ( SCMByte ) * 4);
*p.globalInteger += msPassed;
if( t.wakeCounter == -1 ) {
t.wakeCounter = 0;
}
}
void debugger(){
int hasStarted = 0;
int hasContinued = 0;
while(1){
//wait for a signal
wait(&status);
//if the program exited, just return
if (WIFEXITED( status )){
printf("\nthe program terminated\n");
return;
}
// Quick overview of what's going on here:
// **Variable 'done': Done will keep us within this while loop. If it is
// set to 1 that means we issued the "continue" command.
//
// **Variable 'hasContinued': In the event that we stop at a breakpoint
// and issue a command other than "continue", we will end up calling
// fixBreakpoint a second time. hasContinued will tell the loop
// to pump the breaks, we haven't moved on yet!
int done = 0;
while(!done){
//get user input, what should we do?
if((breakpointCount > 0) && hasStarted && hasContinued){
printf("breakpoint %d hit\n",findBreakpoint(AFTER_BREAKPOINT));
fixBreakpoint(0); // Restore our opcode and registers
hasContinued = 0;
}
user_command * cmd = debugger_interface_get_cmd();
if (cmd){
//now handle the input
switch(cmd->command_type){
case CMD_TYPE_BREAKPOINT:
if(breakpoint(cmd->value.line_number)){
printf("Could not set breakpoint at line %d.\n",cmd->value.line_number);
}
break;
case CMD_TYPE_STACKTRACE:
stacktrace();
break;
case CMD_TYPE_PRINT:
printVariable(cmd->value.var.format,cmd->value.var.name,0);
break;
case CMD_TYPE_PRINT_GEN:
printVariable(cmd->value.var.format,cmd->value.var.name,1);
break;
case CMD_TYPE_CONTINUE:
if(!hasStarted){
// If we are here, that means we are just starting to run the
// program, so nothing special.
hasStarted = 1;
}
else{
// However, if we are here that means we were "interuptted"
// by a break. We fixed the breakpoint and altered our registers
// At the beginning of the parent while loop, so now we want
// to use SINGLE_STEP and then reset the breakpoint that we just
// fixed.
fixBreakpoint(1);
}
done = 1;
hasContinued = 1;
break;
case CMD_TYPE_WHERE:
whereAmI();
break;
}
}
}
ptrace( PTRACE_CONT, child, NULL, NULL );
}
}
