Fix thread safety issue with encoding tables #515
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casperisfine
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eregon
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Jul 31, 2023
lib/addressable/uri.rb
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| end.join('|')})" | ||
| bytes = leave_encoded.bytes | ||
| leave_encoded_downcase = bytes.map { |b| SEQUENCE_ENCODING_TABLE[b] }.join('|') | ||
| leave_encoded_upcase = bytes.map { |b| SEQUENCE_UPCASED_PERCENT_ENCODING_TABLE[b] }.join('|') |
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SEQUENCE_UPCASED_PERCENT_ENCODING_TABLE has extra %:
SEQUENCE_ENCODING_TABLE[
> format("%02x", 45)
=> "2d"
SEQUENCE_UPCASED_PERCENT_ENCODING_TABLE
> format("%%%02X", 45)
=> "%2D"
So it should be without the % because that's already present outside (|%)
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Hum, I think you are right, but it's weird because I didn't change that 🤔
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Ah nevermind, I get it now.
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Should be good now.
Fix: sporkmonger#514 Fix: oracle/truffleruby#3166 These hashes lazily memoize percent encoded characters, this is an issue on GVL-less Ruby implementations as it can cause concurrent access. But these are actually quite wastful as the key is always a single byte so rather than use string keys are lazily memoize these, we can precompute two static arrays of 255 elements once and for all.
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What do we think about the ruby-head failure? |
It is. |
dentarg
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It currently crashes: sporkmonger#515 (comment)
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It currently crashes: #515 (comment)
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Fix: #514
Fix: oracle/truffleruby#3166
These hashes lazily memoize percent encoded characters, this is an issue on GVL-less Ruby implementations as it can cause concurrent access.
But these are actually quite wasteful as the key is always a single byte so rather than use string keys are lazily memoize these, we can precompute two static arrays of 255 elements once and for all.
@eregon @dentarg
NB: I'm not a big addressable user, so I mostly relied on the test suite, hopefully my assertions are correct.