PreserveImportsExportsJS fuzzer: Handle crashes and function ids#8648
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kripken wants to merge 2 commits intoWebAssembly:mainfrom
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PreserveImportsExportsJS fuzzer: Handle crashes and function ids#8648kripken wants to merge 2 commits intoWebAssembly:mainfrom
kripken wants to merge 2 commits intoWebAssembly:mainfrom
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kripken
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Apr 27, 2026
kripken
commented
- Report VM errors as failures (rather than see they still occur after opts).
- Ignore function ID differences in logging.
tlively
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Apr 27, 2026
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| # VM crashes are actual issues we want to find. | ||
| if '(core dumped)' in out or 'Received signal' in out or '== C stack trace ==' in out or '== JS stack trace ==' in out: | ||
| raise Exception(f"VM crash:\n\n{out}") |
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Why is this different than in other fuzz handlers?
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Our normal JS is very careful to swallow and log any JS errors. The return code of the process is always 0.
Here we are running JS that is itself a fuzz testcase, and might error.
tlively
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Apr 27, 2026
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