tree 96b1d9fb2383e399abc05b1a681823af7697b0f0
parent efc7ca4a719029ea636addec9f0c138df01ce420
author John Stiles <johnstiles@google.com> 1630613827 -0400
committer SkCQ <skcq-be@skia-corp.google.com.iam.gserviceaccount.com> 1630636894 +0000

Reject programs which exceed 50 stack frames during size analysis.

Our program-size analysis pass needs to recurse into called functions;
depending on the exact order of functions in the program, this recursion
can hypothetically be as deep as the deepest function-call chain. Set an
upper bound on recursion here, so we don't overflow the stack while
trying to check the program size. In practice, 50 frames is far deeper
than a regular shader should ever go.

Change-Id: I733ee48dad6f8053facdfd9f6d8a2b9b2a4af188
Bug: skia:12396
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/445279
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>