digitalmars.D - getting to know dmd and druntime
- maarten van damme (28/28) Jul 22 2012 Right now I'm a bit confused. ...
Right now I'm a bit confused. I assume that the garbage collector and some other parts from druntime need startup code. But what gets run first is my main method in the d file I compile. Does this mean that the first call to something in druntime calls that startup code? If not, what does get ran first? how can I intercept this and run something else? When compiling without druntime the program will crash when initializing an object. How can I implement my own limited druntime that provides it's own version of the new expression? Druntime contains it's own trimmed down garbage collector that is most likely not very efficient. How can I use that one instead of the other more advanced one? Is the garbage collector embedded in druntime or is it somehow linked at compile time from a c-source (I found gc.c in the dmd source). What else gets linked? What exactly does dmd do? Which parts of druntime does it rely on? I really want to get to know that part of D a bit better. Is this somewhere documented? Ideally I want to compile a d file without druntime (and thus with a very limited subset of D). Then, I want to start writing my own version of druntime (that is, providing the needed methods to get something more advanced working but stubbing everything out). I came accross this blog https://www.semitwist.com/articles/article/view/d-on-gba-nds-progress-thanks-to-oopman but the link to the documentation seems to not be working (and judging by the date it will most likely be about D1). To sum everything up : are the inner workings of dmd-druntime somewhere documented?
Jul 22 2012