Date: Fri, 25 Mar 2022 11:41:18 +0000 From: David Chisnall <theraven@FreeBSD.org> To: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Getting the current thread's stack base / size on FreeBSD Message-ID: <aedca5b2-277e-8fdb-1007-353aba5a5b45@FreeBSD.org>
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Hi all, I'm trying to get the VAVM[1] WebAssembly runtime working on FreeBSD. In its platform-specific code, they need to find the base and size of the current stack. They have code for Linux and macOS, using different non-standard pthread extensions, but I couldn't see a mechanism for doing this on FreeBSD. Is there an API for this? Darwin provides a pair of _np APIs for getting these values. Glibc provides an API for getting the pthread attributes for the current thread, which is a bit more general and useful. Adding this to libthr would be a fairly simple change, if it doesn't exist already. Am I missing an existing mechanism? David [1] https://wavm.github.io/
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