mirror of
https://github.com/janet-lang/janet
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62 lines
2.3 KiB
Janet
62 lines
2.3 KiB
Janet
# Copyright (c) 2026 Calvin Rose
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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(import ./helper :prefix "" :exit true)
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(start-suite)
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# Simple function break
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# a8afc5b81
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(debug/fbreak map 1)
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(def f (fiber/new (fn [] (map inc [1 2 3])) :a))
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(resume f)
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(assert (= :debug (fiber/status f)) "debug/fbreak")
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(debug/unfbreak map 1)
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(map inc [1 2 3])
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# Reading locals of an unmarshalled closure that captures an on-stack
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# environment must validate the env first. The on-stack variant stores a
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# negative, unvalidated offset after unmarshal; without validation debug/stack
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# read the fiber pointer as a value array (out-of-bounds / type confusion).
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(def outer
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(fiber/new
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(fn []
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(def secret 0xBEEF)
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(def capt (fn [] (yield :paused) secret))
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(yield capt)
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:done)
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:y))
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(def capt (resume outer))
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(def inner (fiber/new capt :y))
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(resume inner)
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(def image (marshal inner))
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# Disable collection so the unmarshalled env keeps its unvalidated offset until
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# debug/stack touches it.
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(def old-interval (gcinterval))
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(gcsetinterval 0)
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(def inner2 (unmarshal image))
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(var locals nil)
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(each fr (debug/stack inner2)
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(when (fr :locals) (set locals (fr :locals))))
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(gcsetinterval old-interval)
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(assert (= 0xBEEF (get locals 'secret)) "unmarshalled on-stack env validated in debug/stack")
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(end-suite)
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