tree 679b883c16a9b064a24f103dfd261e87a892d920
parent fb97cfcd6de526d9680f4b645f65718fa4a76e4d
author Shahbaz Youssefi <syoussefi@chromium.org> 1658884024 -0400
committer Angle LUCI CQ <angle-scoped@luci-project-accounts.iam.gserviceaccount.com> 1658944746 +0000

Vulkan: Fix xfb buffer redefine to smaller size

In 89e11878b275b15735eaf273ababfa6fd43a2e3d, a use-after-free bug was
fixed where glBufferData redefined a buffer, leading to a change in
storage.  This was only tested for the case where the new buffer was
larger than the old buffer.

When the new buffer is smaller however, another issue remains where the
buffer size as cached by the transform feedback object used the old
object's size.  This is worked around in this change, with a fix for the
real issue (that the buffer state is updated after calling into the
backend instead of before) coming up.

Bug: chromium:1345042
Change-Id: I6c9e9344705fefe49926a14cf6ce73ce84305872
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3788308
Reviewed-by: Amirali Abdolrashidi <abdolrashidi@google.com>
Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Charlie Lao <cclao@google.com>
Commit-Queue: Amirali Abdolrashidi <abdolrashidi@google.com>