Comments (3)
It is a bird name :-) Canaries was used in the past to see if the air was contaminated in mines (see https://en.wikipedia.org/wiki/Animal_sentinel#Historical_examples). If the canary died the air was bad, we're reusing the term here but we're checking the status of the stack instead.
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This is used here for buffer overflow protection / checking: http://en.wikipedia.org/wiki/Buffer_overflow_protection
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Ah, I got it. You just mark the start and end. If the overflow happened, the canaries must be changed, and you will detected it. That is great.
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