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I am making a garbage collector to develop an appreciation for how they work.
I can process registers as well as heap and stack memory to find potential references to allocated blocks.
But processing the global data memory has eluded me.
Is there a way to get the upper and lower bounds of the global memory space in C (I’m using GCC on Intel OS-X if that helps)?
What other memory areas might I have missed?
I can’t give you a direct answer off-hand here, but I can tell you that the Boehm/Demers/Weiser conservative garbage collector will have code (and likely docs) to show you. This will be very platform dependent, however.