On 03/29/17 04:51 PM, Doug Moore wrote: > Can’t we fix this whole problem by having getcontext subtract from the pc to > start with, so that nobody ever has to decrement the pc on the first call to > unw_step?
That would assume that the ucontext is usually from a signal frame (third argument from a sigaction handler), which is probably pretty common. It would break anyone that grabbed it outside a handler using getcontext() instead of unw_getcontext() though. The current documentation says: ``` On IA-64, unw_context_t has a layout that is compatible with that of ucontext_t and such structures can be initialized with getcontext() instead of unw_getcontext() ``` so it might be a somewhat interface breaking change. Conversely, for your use case you might just be able to bump the ip by one in the ucontext before the first unw_step()? _______________________________________________ Libunwind-devel mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/libunwind-devel
