Stream: git-wasmtime

Topic: wasmtime / issue #6960 Support referencing stack slots in...

Wasmtime GitHub notifications bot (Sep 05 2023 at 20:35):

alexcrichton commented on issue #6960:

Oh interesting! So there's no way for the dwarf sections to actually refer to .eh_frame? It's required at the binary level that the information is duplicated?

Wasmtime GitHub notifications bot (Sep 05 2023 at 20:48):

SingleAccretion commented on issue #6960:

So there's no way for the dwarf sections to actually refer to .eh_frame? It's required at the binary level that the information is duplicated?

I am no great Unix expert myself, so do not know for certain. I _suspect_ that it is indeed possible for the debugger to use .eh_frame alone, though the two sections are a little different in format details as well as usage (.eh_frame is like .pdata on Windows in that it is "mandatory").

FWIW, there are much larger (pun intended) size problems with -g-produced object files at the moment. For one, all the location lists for variables with are very fragmented, it would help a lot if they could always refer to the one and only stack location, at least for unoptimized code.

Wasmtime GitHub notifications bot (Sep 05 2023 at 21:04):

bjorn3 commented on issue #6960:

Rustc doesn't ever emit .debug_frame. The debugger has to use .eh_frame for this information for rust code.

Last updated: Dec 23 2024 at 12:05 UTC