bool
ThreadHandler::HandleBreakpointHit(BreakpointHitEvent* event)
{
CpuState* cpuState = event->GetCpuState();
target_addr_t instructionPointer = cpuState->InstructionPointer();
TRACE_EVENTS("ThreadHandler::HandleBreakpointHit(): ip: %" B_PRIx64 "\n",
instructionPointer);
// check whether this is a temporary breakpoint we're waiting for
if (fBreakpointAddress != 0 && instructionPointer == fBreakpointAddress
&& fStepMode != STEP_NONE) {
if (fStepMode != STEP_UNTIL && _HandleBreakpointHitStep(cpuState))
return true;
} else {
// Might be a user breakpoint, but could as well be a temporary
// breakpoint of another thread.
AutoLocker<Team> locker(fThread->GetTeam());
Breakpoint* breakpoint = fThread->GetTeam()->BreakpointAtAddress(
cpuState->InstructionPointer());
bool continueThread = false;
if (breakpoint == NULL) {
// spurious breakpoint -- might be a temporary breakpoint, that has
// already been uninstalled
continueThread = true;
} else if (!breakpoint->HasEnabledUserBreakpoint()) {
// breakpoint of another thread or one that has been disabled in
// the meantime
continueThread = true;
}
if (continueThread) {
if (fSingleStepping) {
// We might have hit a just-installed software breakpoint and
// thus haven't stepped at all. Just try again.
if (fPreviousInstructionPointer == instructionPointer) {
fDebuggerInterface->SingleStepThread(ThreadID());
return true;
}
// That shouldn't happen. Try something reasonable anyway.
if (fStepMode != STEP_NONE) {
if (_HandleSingleStepStep(cpuState))
return true;
}
}
return false;
}
}
return _HandleThreadStopped(cpuState, THREAD_STOPPED_BREAKPOINT);
}
