Date: Fri, 18 Sep 2020 01:33:46 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 249416] Each call to newlocale(3) with a non-null base argument results in additional memory usage Message-ID: <bug-249416-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249416 Bug ID: 249416 Summary: Each call to newlocale(3) with a non-null base argument results in additional memory usage Product: Base System Version: 12.1-RELEASE Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: bin Assignee: bugs@FreeBSD.org Reporter: leres@freebsd.org Attachment #218038 text/plain mime type: Created attachment 218038 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=218038&action=edit newlocale() test program There appears to be a memory usage issue with newlocale(3) when called with a base argument. This recently started showing symptoms in devel/json-c programs using version 0.14 and higher which started using newlocale() due to a change in the cmake configuration. Here is the devel/json-c PR: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249412 Here is the upstream ticket I created: https://github.com/json-c/json-c/issues/668 Eric Hawicz responded, suggesting that FreeBSD's implementation of newlocale() might be causing the issue. His helpful test program confirms this. Attached to this PR is a modified version that uses sysctl() to automatically track and report changes to rss and vsz. Eric points out that FreeBSD and linux man pages describe different behavior; FreeBSD: https://www.freebsd.org/cgi/man.cgi?query=newlocale&sektion=3&manpath=freebsd-release-ports "Creates a new locale, inheriting some properties from an existing locale." Note that there do not appear to be uses of newlocale() with a non-null base argument in the current source tree; linux: https://man7.org/linux/man-pages/man3/newlocale.3.html "The newlocale() function creates a new locale object, or modifies an existing object..." And that posix says: https://pubs.opengroup.org/onlinepubs/9699919799/functions/newlocale.html "The newlocale() function shall create a new locale object or modify an existing one." I did some testing with versions of lib/libc/locale going back to 2012 and all had this issue. -- You are receiving this mail because: You are the assignee for the bug.help
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