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Fuzzer: Ignore V8 errors on uninitialized non-defaultable locals #6337

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merged 2 commits into from
Feb 22, 2024
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Fuzzer: Ignore V8 errors on uninitialized non-defaultable locals #6337

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198606a
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kripken Feb 22, 2024
2b1bc73
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kripken Feb 22, 2024
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9 changes: 9 additions & 0 deletions scripts/fuzz_opt.py
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Original file line number Diff line number Diff line change
Expand Up @@ -462,6 +462,13 @@ def pick_initial_contents():
# --fuzz-exec reports a stack limit using this notation
STACK_LIMIT = '[trap stack limit]'

# V8 reports this error in rare cases due to limitations in our handling of non-
# nullable locals in unreachable code, see
# https://github.com/WebAssembly/binaryen/pull/5665
# https://github.com/WebAssembly/binaryen/issues/5599
# and also see the --dce workaround below that also links to those issues.
V8_UNINITIALIZED_NONDEF_LOCAL = 'uninitialized non-defaultable local'


# given a call line that includes FUZZ_EXEC_CALL_PREFIX, return the export that
# is called
Expand Down Expand Up @@ -635,6 +642,8 @@ def filter_known_issues(output):
# strings in this list for known issues (to which more need to be
# added as necessary).
HOST_LIMIT_PREFIX,
# see comment above on this constant
V8_UNINITIALIZED_NONDEF_LOCAL,
]
for issue in known_issues:
if issue in output:
Expand Down
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