Stream: git-wasmtime

Topic: wasmtime / issue #6820 Wasmtime valgrind

Wasmtime GitHub notifications bot (Aug 08 2023 at 18:18):

cfallin commented on issue #6820:

For some context for others: Sophia (@ssunkin-fastly) is our summer intern who has written a "Valgrind for Wasm" feature: we want to hook loads, stores, mallocs and frees inside a Wasm guest (presumably written in an unsafe language like C or C++) and catch memory safety violations (use-after-frees, double-frees, out-of-bounds indexing, etc.). The feature works at an MVP level with tests written in C/C++; it's not yet fully general (multi-memories, arbitrary annotations for custom allocators, etc) but we want to merge the MVP first and then file followup issues.

@ssunkin-fastly: would you mind either rebasing or merging main to fix the merge conflicts here? (Happy to help if needed.)

Wasmtime GitHub notifications bot (Aug 08 2023 at 22:45):

github-actions[bot] commented on issue #6820:

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cc @peterhuene

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Wasmtime GitHub notifications bot (Aug 08 2023 at 22:45):

github-actions[bot] commented on issue #6820:

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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Last updated: Dec 23 2024 at 12:05 UTC