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f85203097f78d9daa1d35c4097a80beab31da2a4 lockedpool: avoid sensitive data in core files (FreeBSD) (Vasil Dimov) Pull request description: This is a followup to 23991ee53 / https://github.com/bitcoin/bitcoin/pull/15600 to also use madvise(2) on FreeBSD to avoid sensitive data allocated with secure_allocator ending up in core files in addition to preventing it from going to the swap. ACKs for top commit: sipa: ACK f85203097f78d9daa1d35c4097a80beab31da2a4 if someone verifies this works as intended on *BSD. laanwj: ACK f85203097f78d9daa1d35c4097a80beab31da2a4 practicalswift: Code-review ACK f85203097f78d9daa1d35c4097a80beab31da2a4 assuming a reviewer with FreeBSD access verifies that the PR goal is achieved :) Tree-SHA512: 2e6d4ab6a9fbe18732c8ba530eacc17f58128c97140758b80c905b5b838922a2bcaa5f9abc45ab69d5a1a2baa0cba322f006048b60a877228e089c7e64dadd2a