Stream: git-wasmtime

Topic: wasmtime / PR #4739 Port v8 fuzzer to the new framework

Wasmtime GitHub notifications bot (Aug 19 2022 at 18:31):

alexcrichton opened PR #4739 from meta-v8 to main:

This commit aims to improve the support for the new "meta" differential
fuzzer added in #4515 by ensuring that all existing differential fuzzing
is migrated to this new fuzzer. This PR includes features such as:

• The V8 differential execution is migrated to the new framework.

• Config::set_differential_config no longer force-disables wasm
  features, instead allowing them to be enabled as per the fuzz input.

• DiffInstance::{hash, hash} was replaced with
  DiffInstance::get_{memory,global} to allow more fine-grained
  assertions.

• Support for FuncRef and ExternRef have been added to DiffValue
  and DiffValueType. For now though generating an arbitrary
  ExternRef and FuncRef simply generates a null value.

• Arbitrary DiffValue::{F32,F64} values are guaranteed to use
  canonical NaN representations to fix an issue with v8 where with the
  v8 engine we can't communicate non-canonical NaN values through JS.

• DiffEngine::evaluate allows "successful failure" for cases where
  engines can't support that particular invocation, for example v8 can't
  support v128 arguments or return values.

• Smoke tests were added for each engine to ensure that a simple wasm
  module works at PR-time.

• Statistics printed from the main fuzzer now include percentage-rates
  for chosen engines as well as percentage rates for styles-of-module.

There's also a few small refactorings here and there but mostly just
things I saw along the way.

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Wasmtime GitHub notifications bot (Aug 19 2022 at 18:31):

alexcrichton requested abrown for a review on PR #4739.

Wasmtime GitHub notifications bot (Aug 19 2022 at 18:40):

abrown submitted PR review.

Wasmtime GitHub notifications bot (Aug 19 2022 at 18:41):

alexcrichton updated PR #4739 from meta-v8 to main.

Wasmtime GitHub notifications bot (Aug 19 2022 at 18:41):

alexcrichton has enabled auto merge for PR #4739.

Wasmtime GitHub notifications bot (Aug 19 2022 at 19:19):

alexcrichton merged PR #4739.

Last updated: Dec 23 2024 at 12:05 UTC