![]() When a code breakpoint is correctly set the DDT status window will also display a message with the function name, the line and the file name (full path) where the breakpoint was set.This list of Macintosh error codes is erroneus as soon as it's put up. Depending on the platform, the programming language and the program itself the state can be composed by few elements or by many many elements. ![]() ![]() When you click on a program line then a little rounded black dot icon will appear on the extreme left of the line, that indicates the break point is successfully set for that line and, when execution will reach that line, DDT will freeze RISC OS and we’ll be able to check the “ state” of our code.įor beginners: the state of a program is represented by all values stored on all the variables, pointers, arrays, matrixes, data structures and, pretty much, any writable memory location used by our program as control data at a given point in time. The most intuitive way to set a code breakpoint is to move the mouse pointer on the source code in the main window (aka context window) and then click (with the left mouse button) on the program line where we want to set the breakpoint (this works also for the disassembled code). There are multiple ways to set breakpoints in DDT. WIMP Events breakpoints, this type of breakpoints interrupt the program execution when a specified WIMP event is received by our program.SWI breakpoints, this type of breakpoint interrupt our program execution flow when it calls an SWI (SoftWare Interrupt, and old way to call System Services) for which we have set up the SWI breakpoint. ![]()
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