On Fri, Jan 22, 2010 at 12:32:32PM +0530, Srikar Dronamraju wrote: > Here is a summary of the Comments and actions that need to be taken for > the current uprobes patchset. Please let me know if I missed or > misunderstood any of your comments. > > 1. Uprobes depends on trap signal. > Uprobes depends on trap signal rather than hooking to the global > die notifier. It was suggested that we hook to the global die notifier. > > In the next version of patches, Uprobes will use the global die > notifier and look at the per-task count of the probes in use to > see if it has to be consumed. > > However this would reduce the ability of uprobe handlers to > sleep. Since we are dealing with userspace, sleeping in handlers > would have been a good feature. We are looking at ways to get > around this limitation.
We could set a TIF_ flag in the notifier to indicate a breakpoint hit and process it in task context before the task heads into userspace. Ananth
