Date: Tue, 13 Jan 2015 14:51:16 -0800 From: Sean Bruno <sbruno@ignoranthack.me> To: freebsd-current@freebsd.org Subject: Re: Connected sanitizer libraries to the build (for x86) Message-ID: <54B5A164.2040102@ignoranthack.me> In-Reply-To: <FCF2A752-8B03-45BD-B548-A28FCBB27C7B@FreeBSD.org> References: <FCF2A752-8B03-45BD-B548-A28FCBB27C7B@FreeBSD.org>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 01/13/15 12:28, Dimitry Andric wrote: > Hi, > > In r277146, I have connected the sanitizer libraries from > compiler-rt to the build. Currently, this works for i386 and > amd64, and contains Address Sanitizer (ASan) and Undefined Behavior > Sanitizer. > > AddressSanitizer is a fast memory error detector [1]. It consists > of a compiler instrumentation module and a run-time library. The > tool can detect the following types of bugs: > > * Out-of-bounds accesses to heap, stack and globals * > Use-after-free * Use-after-return (to some extent) * Double-free, > invalid free * Memory leaks (experimental) > > The typical slowdown introduced by AddressSanitizer is 2x. Enable > it by compiling and linking with clang, and using the > -fsanitize=address flag. > > Undefined Behavior Sanitizer is a fast and compatible undefined > behavior checker, which enables a number of checks that have small > runtime cost and no impact on address space layout or ABI. Enable > it by using the -fsanitize=undefined flag. [2] > > Please note that the sanitizers still have some rough edges on > FreeBSD, particularly on i386. These will hopefully be smoothed > out in the coming time. Reports of problems (and fixes :) are very > welcome, but please log them in Bugzilla, so they can be tracked. > > -Dimitry > > [1] > http://llvm.org/releases/3.5.0/tools/clang/docs/AddressSanitizer.html > > [2] http://llvm.org/releases/3.5.0/tools/clang/docs/UsersManual.html#opt-fsanitize-undefined > Do you want a test run for arm? sean -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQF8BAEBCgBmBQJUtaFkXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXRCQUFENDYzMkU3MTIxREU4RDIwOTk3REQx MjAxRUZDQTFFNzI3RTY0AAoJEBIB78oecn5k5nsH/iHhTW359K0f2BtUDBwH/+ga 9w7MbymRJZvKTh60LABeuN//DJ9BBRHzGHtRd5nYvvLSBN5HfVy2LbmNvz9H1p0B /Gw6N9XL3pVMpLxU4JP6IMJ6c1YIlrapDxfUPOVpEPmdOeZ2xPsgRDB20tDNuKxj AQftpNqf1KJL0FhzfKv0TupxPpCKuffTfO+kYa5tQQU/bDXkgxB1BsuxUD/4HiZU nRAsbhlZV1roEo3l36a2mlRtc6sEPpZTKn4Phv3oNT7cfCd5hnuhyCfcZOWk7yXo HyboVn10ABX8GismKQ0erkxNhcHD4VepY2CCc/0z+AhUV0DztpfLvzDoEE0lDaY= =DqeZ -----END PGP SIGNATURE-----
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