34 lines
1.1 KiB
Factor
34 lines
1.1 KiB
Factor
USING: assocs help.markup help.syntax vm words ;
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IN: tools.gc-decode
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ARTICLE: "tools.gc-decode" "GC maps decoder"
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"A vocab that disassembles words gc maps. It's useful to have when debugging garbage collection issues." ;
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HELP: word>gc-info
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{ $values { "word" word } { "gc-info" gc-info } }
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{ $description "Gets the gc-info struct for a word." } ;
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HELP: decode-gc-maps
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{ $values { "word" word } { "assoc" assoc } }
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{ $description "Main word of the vocab. Decodes the gc maps for a word into an assoc with the following format:"
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{ $list
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"Each key is the return addess of a gc callsite (delta relative to the start of the code block)."
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{
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"Each value is a two-tuple where:"
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{ $list
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"The first element is a five-tuple containing the scrub patterns for the datastack, retainstack, then the check patterns for them and gc roots."
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"The second element is a sequence of derived roots for the callsite."
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}
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}
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}
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}
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{ $examples
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{ $unchecked-example
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"USING: effects prettyprint ;"
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"\\ <effect> decode-gc-maps ."
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"{ { 151 { { ?{ } ?{ t t t } ?{ } ?{ } ?{ f t t t t } } { } } } }"
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}
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} ;
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ABOUT: "tools.gc-decode"
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