tree 6cb103ead0f6b7447f518dedfbf92a50b1ca1f7d
parent 24530cae538d9933459c898134d8d3b0c0e59022
author Nicolas Capens <capn@google.com> 1633541777 -0400
committer Nicolas Capens <nicolascapens@google.com> 1633716719 +0000

Don't initialize host memory allocations in MSan builds

This allows detecting more potential uses of uninitialized memory in
MemorySanitizer (MSan) builds.

SwiftShader's internal uses of memory allocated by sw::allocate() should
be MSan error free at this point (explicitly initialized where needed),
and this change helps catch regressions.

Non-MSan builds are unaffected by this change, so that any errors that
are found in the near term don't pose a security risk. A subsequent
change will remove initialization for non-MSan builds as well.

Bug: b/140991626
Change-Id: I7843e4a4b806dc9108ac100706806c15bcea4ca9
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/57889
Reviewed-by: Alexis Hétu <sugoi@google.com>
Tested-by: Nicolas Capens <nicolascapens@google.com>