Hi, On Thu, 28 Jun 2018, Jeff Law wrote:
> I believe "dumb" is referring to the fact that we're already in a bit of > a weird state as evidenced by the NULL FDE. Blindly trying to read the > contents of the PC that we couldn't map to an FDE is, IMHO, dumb. > > One might even be able to argue in this day and age that we should have > suitable descriptors for everything. If no suitable descriptor is found > then backtracing should stop. Lack of suitable descriptors in any code > would be considered a bug in that scenario. I disagree. ASM code often lacks unwind descriptors (now less than in the past, but still). My rule of thumb is always: no descriptor -> has to be a framepointer-using routine with standard calling sequence. (I.e. declare the combination of no descriptor and no fp to be a bug). Some of the callee-saved register will temporarily be wrong but unwinding can continue. Ciao, Michael.
