WebAssembly / WebAssembly/wabt
[wasm-interp] incorrect semantics in table.grow
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- Dominant language
- C++
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- Merged PRs (30d)
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Description
Build
Build wasm-interp in debug mode
Command
./wasm-interp --enable-memory64 poc.wasm --run-all-exports
Observed result
test_grow_truncation() => i64:10 and get_table_size() => i64:15
Expected behavior
Should fail because the requested delta would exceed the table maximum
Environment
- wabt 1.0.39
- OS: Linux x86_64 Ubuntu
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Build wabt in debug mode and reproduce the issue with the provided poc.wasm using ./wasm-interp --enable-memory64 poc.wasm --run-all-exports. Start at the wasm-interp handling of table.grow and inspect how test_grow_truncation() and get_table_size() behave; done means the request fails when the delta exceeds the table maximum.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- cpp, wasm
- Domain
- compilers
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Quiet
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100