tree dc1c070ceabe2609b25f2ec7dd25c5ac3e3436f3
parent 77ebb7fdd7825df2c2b2ceed19ce3583808bd1dc
author Nicolas Capens <capn@google.com> 1637646022 -0500
committer Nicolas Capens <nicolascapens@google.com> 1637784434 +0000

Use size_t for methods returning memory sizes

By returning size_t instead of int we ensure that on 64-bit platforms
any arithmetic that uses these methods is done in 64-bit, which makes it
easy to detect whether resources would exceed the 4 GiB (or lower) limit
imposed by using 32-bit indices to perform memory accesses.

Places where we intentionally cast to 32-bit are now explicit and use
unsigned integers instead. In a subsequent change these casts will
include an assert that no information was lost.

Bug: b/200806413
Change-Id: I1cfea566444357614d1b2c2b878926e99f61b312
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/60008
Tested-by: Nicolas Capens <nicolascapens@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>
Reviewed-by: Sean Risser <srisser@google.com>