From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 1E82F383F406; Fri, 28 Jan 2022 23:01:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1E82F383F406 From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug analyzer/103872] testcase fail in gcc.dg/analyzer/pr103526.c on riscv64-unknown-elf-gcc Date: Fri, 28 Jan 2022 23:01:12 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: analyzer X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: diagnostic, testsuite-fail X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: dmalcolm at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cf_gcctarget bug_status cf_reconfirmed_on everconfirmed 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: Fri, 28 Jan 2022 23:01:12 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103872 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Target|riscv64-unknown-elf |riscv64-unknown-elf | |hppa*-*-* aarch64-*-* Status|UNCONFIRMED |NEW Last reconfirmed| |2022-01-28 Ever confirmed|0 |1 --- Comment #2 from Andrew Pinski --- strict alignment is causing the memcpy to have slightly different IR between the targets. I can reproduce the failure on aarch64 with -mstrict-align. ubuntu@ubuntu:~/src/upstream-gcc-aarch64/gcc/objdir/gcc\# ./xgcc -B. t.c -fanalyzer -Wanalyzer-too-complex -fanalyzer-call-summaries ubuntu@ubuntu:~/src/upstream-gcc-aarch64/gcc/objdir/gcc\# ./xgcc -B. t.c -fanalyzer -Wanalyzer-too-complex -fanalyzer-call-summaries -mstrict-align t.c: In function 'game_new': t.c:31:1: warning: leak of 'tmp.word_state' [CWE-401] [-Wanalyzer-malloc-le= ak] 31 | } /* { dg-bogus "leak" } */ | ^ 'game_new': events 1-7 | | 20 | if ((tmp.word_state =3D malloc(wordlen+1)) =3D=3D NULL) | | ~ ^~~~~~~~~~~~~~~~~ | | | | | | | (1) allocated here | | (2) assuming 'tmp.word_state' is non-NULL | | (3) following 'false' branch... | 21 | goto err; | 22 | if ((rval =3D malloc(sizeof(*rval))) =3D=3D NULL) | | ~ ~~~~~~~~~~~~~~~~~~~~~ | | | | | | | (4) ...to here | | (5) following 'false' branch (when 'rval' is non-NULL)... | 23 | goto err; | 24 | memcpy(rval, &tmp, sizeof(*rval)); | | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | | | | | (6) ...to here |...... | 31 | } /* { dg-bogus "leak" } */ | | ~ | | | | | (7) 'tmp.word_state' leaks here; was allocated at (1) |=