zturner added a comment.

In D56229#1346869 <https://reviews.llvm.org/D56229#1346869>, @Hui wrote:

> Not quite sure but correct me if i am wrong.
>
> (1) I think the Debug Directory is optional for COFF if it does have debug 
> information and pdb to match with.
>
> (2) The Debug Directory does not contain COFF timestamp.
>
> Using md5 seems very tentative. Please elaborate how to leverage both COFF 
> contents and the existing GUID mentioned?


Well, I guess I would ask what you want to do with the GUID?  If you want to 
match it to a debug information file, then the Debug Directory is the correct 
way to do that, and using a hash of the file path will not even be helpful.

Another option would be to check for a debug directory of type 
`IMAGE_DEBUG_TYPE_REPRO`, and if that exists, then it means that the COFF 
timestamp is a hash of the binary, so it should be stable.

If neither of these is present, then I think we should simply return `false` 
from this function and not mislead the caller.  The caller might wish to use 
special logic if the function returns false that says "if I couldn't get a UUID 
from the file, then try hashing the path and doing some kind of lookup based on 
that", but I don't think that should be part of this function.


Repository:
  rLLDB LLDB

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D56229/new/

https://reviews.llvm.org/D56229



_______________________________________________
lldb-commits mailing list
lldb-commits@lists.llvm.org
http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-commits

Reply via email to