Method HandleBreakpoints

src/hx/Debugger.cpp:560–682

Note that HandleBreakpoints is called immediately after a read memory barrier by the HX_STACK_LINE macro

    // Note that HandleBreakpoints is called immediately after a read memory
    // barrier by the HX_STACK_LINE macro
    static void HandleBreakpoints(hx::StackContext *stack)
    {
        // This will be set to a valid status if a stop is needed
        DebugStatus breakStatus = DBG_STATUS_INVALID;
        int breakpointNumber = -1;


        // The debug thread never breaks
        if (stack->mThreadId == g_debugThreadNumber) {
            return;
        }

        if (sExecutionTrace==exeTraceLines)
           stack->tracePosition();

        // Handle possible immediate break
        if (gStepType == STEP_NONE) {
            // No stepping
        }
        else if (gStepType == STEP_INTO) {
            if ((gStepThread == -1) ||
                (gStepThread == stack->mThreadId)) {
                breakStatus = DBG_STATUS_STOPPED_BREAK_IMMEDIATE;
            }
        }
        else {
            if ((gStepThread == -1) ||
                (gStepThread == stack->mThreadId)) {
                if (gStepType == STEP_OVER) {
                    if (stack->getDepth() <= gStepLevel) {
                        breakStatus = DBG_STATUS_STOPPED_BREAK_IMMEDIATE;
                    }
                }
                else { // (gStepType == STEP_OUT)
                    if (stack->getDepth() < gStepLevel) {
                        breakStatus = DBG_STATUS_STOPPED_BREAK_IMMEDIATE;
                    }
                }
            }
        }

        // If didn't hit any immediate breakpoints, check for set breakpoints
        if (breakStatus == DBG_STATUS_INVALID) {
            Breakpoints *breakpoints = stack->mDebugger->mBreakpoints;
            // If the current thread has never gotten a reference to
            // breakpoints, get a reference to the current breakpoints
            if (!breakpoints) {
                gMutex.lock();
                // Get break points and ref it
                breakpoints = gBreakpoints;
                // This read memory barrier ensures that old values within
                // gBreakpoints are not seen after gBreakpoints has been set
                // here
                read_memory_barrier();
                stack->mDebugger->mBreakpoints = breakpoints;
                breakpoints->AddRef();
                gMutex.unlock();
            }