From owner-freebsd-hackers@freebsd.org Thu Dec 13 05:11:37 2018 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id EE2831339093 for ; Thu, 13 Dec 2018 05:11:36 +0000 (UTC) (envelope-from andrew@ziglang.org) Received: from mail.ziglang.org (mail.ziglang.org [108.61.23.47]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mail.ziglang.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 6D8786DB83 for ; Thu, 13 Dec 2018 05:11:31 +0000 (UTC) (envelope-from andrew@ziglang.org) To: freebsd-hackers@freebsd.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ziglang.org; s=mail; t=1544677884; bh=kVPTHPmVhDfhewR1VzgUG/M1EXfOTjr7cakFpsHvHoI=; h=To:From:Subject:Date; b=XXuYpRKn+u9NVWaCXBMB59Xu9IBqC0WEFj8zCPi1Weui5vQvUY4iQv1Wo21UN4/5/ JLxCavDz0ofVCGI/H/QNLcD/nfadnTbCgtb6ygnojNpmylJMEPAPlPGimtLvO6VBoA xGH2grOSp2V+WmqQTliNktEFaoE9w9nVFNWimV3I= From: Andrew Kelley Subject: raise() implementation in freebsd libc vs musl libc Openpgp: preference=signencrypt Autocrypt: addr=andrew@ziglang.org; 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micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="XIgApqZuOrt2zj5has1qHEWEWoc3PXhgM" X-Rspamd-Queue-Id: 6D8786DB83 X-Spamd-Bar: ---- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=ziglang.org header.s=mail header.b=XXuYpRKn; spf=pass (mx1.freebsd.org: domain of andrew@ziglang.org designates 108.61.23.47 as permitted sender) smtp.mailfrom=andrew@ziglang.org X-Spamd-Result: default: False [-4.56 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-0.98)[-0.982,0]; R_DKIM_ALLOW(-0.20)[ziglang.org:s=mail]; FROM_HAS_DN(0.00)[]; R_SPF_ALLOW(-0.20)[+ip4:108.61.23.47]; TO_MATCH_ENVRCPT_ALL(0.00)[]; HAS_ATTACHMENT(0.00)[]; MIME_GOOD(-0.20)[multipart/signed,multipart/mixed,text/plain]; TO_DN_NONE(0.00)[]; RCPT_COUNT_ONE(0.00)[1]; DMARC_NA(0.00)[ziglang.org]; DKIM_TRACE(0.00)[ziglang.org:+]; MX_GOOD(-0.01)[mail.ziglang.org]; NEURAL_HAM_SHORT(-0.81)[-0.814,0]; SIGNED_PGP(-2.00)[]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:+]; IP_SCORE(-0.15)[asn: 20473(-0.67), country: US(-0.09)]; ASN(0.00)[asn:20473, ipnet:108.61.0.0/18, country:US]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 13 Dec 2018 05:11:37 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --XIgApqZuOrt2zj5has1qHEWEWoc3PXhgM Content-Type: multipart/mixed; boundary="yKqsLoVNDuOgjEM2fX4ndnu9mScsO9dee"; protected-headers="v1" From: Andrew Kelley To: freebsd-hackers@freebsd.org Message-ID: <70c7214e-3619-115d-abca-09853a1729a6@ziglang.org> Subject: raise() implementation in freebsd libc vs musl libc --yKqsLoVNDuOgjEM2fX4ndnu9mScsO9dee Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable Howdy, I noticed that musl-libc blocks signals in raise() to prevent a race condition, but freebsd libc does not. is there a reason it's necessary on linux and not freebsd? musl int raise(int sig) { sigset_t set; __block_app_sigs(&set); int ret =3D syscall(SYS_tkill, __pthread_self()->tid, sig); __restore_sigs(&set); return ret; } freebsd int __raise(int s) { long id; if (__sys_thr_self(&id) =3D=3D -1) return (-1); return (__sys_thr_kill(id, s)); } Regards, Andrew --yKqsLoVNDuOgjEM2fX4ndnu9mScsO9dee-- --XIgApqZuOrt2zj5has1qHEWEWoc3PXhgM Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEl8v20Nl/A6duouJgfF9Uj3KFAakFAlwR6fkACgkQfF9Uj3KF AanXAhAAubSBV5ekwOjyRSXn9J1aeUx358Zes3vq7auuzyEgmjpI2tJ5o1du1QLM WRHHPvSpFzkGa3+P3or7Fs/ZZ+RzhJ4LEZwB9vRRFb8uzOQ0MztdQrwk4F+M0bTz VqLI8hF71FoXUZerjtxJo0tMGrHf3Q666ONp9L9/jwVP6KDsI2drBkoN3jie+Psz 1xAQ7nCpd+Zva4UXLkj7xYC3QfTG77yoEdBhwTH4yScCk5ppoh8ggT7OJ5fenNfq Tjxafc84DXsjtu9xIaV61M4EQaqdiLr5MroduHXX9XIC/qCdGV9PtY8+HTGJZgxP d7DdMSm+jVaWivjubnzgPeXn/e4GysAAGUVwPsFwchPSUbMsEQWfUr2In+NwPuRU +AKK9VzupX8l5G55NSpvmG/4tB2qz9h9JxHO2sOJCm2xLSWDQbKuUL8elH3E2ySj M7B8qRzITmfnviNKcgmi/8CrrF22YlJV2Xncz23ejD5ss2gMFBOaSgckuSTN/YNH d9RVA5sMZLn0wzk5Cbj3y4q3PZ8hsYZclnZs4epOif/cNOeqkvAFW0gaREdhAjXU NUxV/anCpX4YYv7igg4CWUMvGb3P1dGAsnfoJ4i8ei5b87qkfOcsjKtuuzXJw/sP kbiSykTtJQu6DR/FJhfFXjj/auFnqaL6YyTzlVmd4xaylni99Dg= =7NxN -----END PGP SIGNATURE----- --XIgApqZuOrt2zj5has1qHEWEWoc3PXhgM--