commit d56ee2e3df56ad13e5d2f2d790faaffc3a493aee
author Andreas Haas <ahaas@chromium.org> Wed May 22 14:04:36 2019
committer Commit Bot <commit-bot@chromium.org> Wed May 22 14:59:50 2019
tree 22f8f855479682e112503101c64f184e62d24eb6
parent 4088c521f622c96c246cd57f8e29964e7fe50f6a

[wasm][anyref] Cache export wrappers per signature

Up until now, we cached export wrappers per export index. With the
anyref proposal potentially many more functions will need export
wrappers, e.g. any function that is stored in a table, and any
function accessed by the new ref.func instruction.

With this CL, we change the caching scheme an do the caching per
signature. Thereby we can guarantee that any export wrapper which
potentially exists can be stored in the cache.

For cctests which use wasm-run-utils, we don't know the size of the
cache anymore ahead of time. However, we assume that no more than
5 signatures will be used in any cctest. If this assumption is not
true, we can just adjust the number.

The cache is now accessed in all code paths where we need an export
wrapper.

Bug: chromium:962850

Change-Id: I32df60dfa7801d1e71f7d837da091f388198af1f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1615247
Commit-Queue: Andreas Haas <ahaas@chromium.org>
Reviewed-by: Clemens Hammacher <clemensh@chromium.org>
Cr-Commit-Position: refs/heads/master@{#61752}