On Thu, 2011-01-27 at 15:31 +0530, Srikar Dronamraju wrote: > > > You can, if only to wreck your thing, you can call mmap() as often as > > you like (until your virtual memory space runs out) and get many many > > mapping of the same file. > > > > It doesn't need to make sense to the linker, all it needs to do is > > confuse your code ;-) > > Currently if there are multiple mappings of the same executable > code, only one mapped area would have the breakpoint inserted. Right, so you could use it to make debugging harder.. > If the code were to execute from some other mapping, then it would > work as if there are no probes. However if the code from the > mapping that had the breakpoint executes then we would see the > probes. > > If we want to insert breakpoints in each of the maps then we > would have to extend mm->uprobes_vaddr. > > Do you have any other ideas to tackle this? Supposing I can get my preemptible mmu patches anywhere.. you could simply call install_uprobe() while holding the i_mmap_mutex ;-) > Infact do you think we should be handling this case? I'm really not sure how often this would happen, but dealing with it sure makes me feel better.. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href