From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id E9F8E3857C4E; Wed, 30 Sep 2020 13:26:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org E9F8E3857C4E From: "mail at milianw dot de" To: gcc-bugs@gcc.gnu.org Subject: [Bug sanitizer/97229] pointer-compare sanitizer is very slow due to __asan::IsAddressNearGlobal Date: Wed, 30 Sep 2020 13:26:13 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: sanitizer X-Bugzilla-Version: 10.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: mail at milianw dot de X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: marxin at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 30 Sep 2020 13:26:14 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97229 --- Comment #2 from Milian Wolff --- As I said, >99% of the samples point to this backtrace: ``` __sanitizer_ptr_cmp __asanCheckForInvalidPointerPair __asanCheckForInvalidPointerPair __asan::IsInvalidPointerPair __asan::GetGlobalAddressInformation(unsigned long, unsigned long, ...) __asan::GetGlobalsForAddress(unsigned long, __asan_global*, ...) __asan::isAddressNearGlobal ``` if you want per-line cost attribution, I'd first have to compile the saniti= zer runtime with debug symbols. If you really need the `perf report` output instead (why?) I can redo the measurement again.=