Stream: git-wasmtime

Topic: wasmtime / PR #10123 Make it easier to reuse fuzzing con...

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:12):

alexcrichton edited PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:12):

alexcrichton edited PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:12):

alexcrichton commented on PR #10123:

(sorry missed I had two commits here so I've updated the PR title/description with what I intended)

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:16):

alexcrichton commented on PR #10123:

An example of this:

Before

[2025-01-27T17:16:09Z DEBUG wasmtime_fuzzing::oracles] running "/home/alex/code/wasmtime/tests/spec_testsuite/simd_load_extend.wast"
[2025-01-27T17:16:09Z DEBUG wasmtime_fuzzing::generators::config] creating wasmtime config with WasmtimeConfig {
        opt_level: SpeedAndSize,
        regalloc_algorithm: Backtracking,
        debug_info: false,
        canonicalize_nans: false,
        interruptable: false,
        consume_fuel: true,
        epoch_interruption: false,
        memory_config: CustomUnaligned,
        force_jump_veneers: false,
        memory_init_cow: false,
        memory_guaranteed_dense_image_size: 2314885530818453536,
        use_precompiled_cwasm: false,
        async_stack_zeroing: false,
        strategy: OnDemand,
        codegen: Native,
        padding_between_functions: None,
        generate_address_map: false,
        native_unwind_info: false,
        compiler_strategy: Winch,
        collector: Null,
        table_lazy_init: true,
        pcc: true,
        async_config: Disabled,
        signals_based_traps: true,
    }

After

[2025-01-27T17:15:44Z DEBUG wasmtime_fuzzing::oracles] running "/home/alex/code/wasmtime/tests/spec_testsuite/simd_load_extend.wast"
[2025-01-27T17:15:44Z DEBUG wasmtime_fuzzing::generators::config] a custom unaligned host memory will be in use
[2025-01-27T17:15:44Z DEBUG wasmtime_fuzzing::generators::config] creating wasmtime config with CLI options:
    -Ccompiler=winch -Ccollector=null -Cparallel-compilation=n -Cnative-unwind-info=n -Oopt-level=s -Oregalloc-algorithm=backtracking -Omemory-reservation=0 -Omemory-reservation-for-growth=0 -Omemory-guard-size=0 -Oguard-before-linear-memory=n -Omemory-init-cow=n -Omemory-guaranteed-dense-image-size=16777216 -Osignals-based-traps=y -Wnan-canonicalization=n -Wfuel=18446744073709551615 -Wepoch-interruption=n -Wasync-stack-zeroing=n -Wbulk-memory=y -Wmulti-memory=n -Wmulti-value=y -Wreference-types=y -Wsimd=y -Wtail-call=n -Wthreads=n -Wmemory64=n -Wcomponent-model-more-flags=n -Wcomponent-model-async=n -Wfunction-references=n -Wgc=n -Wcustom-page-sizes=n -Wwide-arithmetic=n -Wextended-const=n -Daddress-map=n

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:19):

alexcrichton updated PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:35):

alexcrichton updated PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 17:53):

alexcrichton updated PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 19:06):

abrown submitted PR review:

Seems pretty useful!

Wasmtime GitHub notifications bot (Jan 27 2025 at 20:45):

github-actions[bot] commented on PR #10123:

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Wasmtime GitHub notifications bot (Jan 27 2025 at 21:19):

alexcrichton updated PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 21:20):

alexcrichton has enabled auto merge for PR #10123.

Wasmtime GitHub notifications bot (Jan 27 2025 at 21:44):

github-actions[bot] commented on PR #10123:

Label Messager: wasmtime:config

It looks like you are changing Wasmtime's configuration options. Make sure to
complete this check list:

• [ ] If you added a new Config method, you wrote extensive documentation for
  it.

  <details>

  Our documentation should be of the following form:

  ```text
  Short, simple summary sentence.

  More details. These details can be multiple paragraphs. There should be
  information about not just the method, but its parameters and results as
  well.

  Is this method fallible? If so, when can it return an error?

  Can this method panic? If so, when does it panic?

  Example

  Optional example here.
  ```

  </details>

• [ ] If you added a new Config method, or modified an existing one, you
  ensured that this configuration is exercised by the fuzz targets.

  <details>

  For example, if you expose a new strategy for allocating the next instance
  slot inside the pooling allocator, you should ensure that at least one of our
  fuzz targets exercises that new strategy.

  Often, all that is required of you is to ensure that there is a knob for this
  configuration option in [wasmtime_fuzzing::Config][fuzzing-config] (or one
  of its nested structs).

  Rarely, this may require authoring a new fuzz target to specifically test this
  configuration. See [our docs on fuzzing][fuzzing-docs] for more details.

  </details>

• [ ] If you are enabling a configuration option by default, make sure that it
  has been fuzzed for at least two weeks before turning it on by default.

[fuzzing-config]: https://github.com/bytecodealliance/wasmtime/blob/ca0e8d0a1d8cefc0496dba2f77a670571d8fdcab/crates/fuzzing/src/generators.rs#L182-L194
[fuzzing-docs]: https://docs.wasmtime.dev/contributing-fuzzing.html

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Wasmtime GitHub notifications bot (Jan 27 2025 at 21:58):

alexcrichton merged PR #10123.

Last updated: Feb 28 2025 at 03:10 UTC