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Mon, 05 Jun 2023 11:41:38 +0000 Received: from smtpav03.fra02v.mail.ibm.com (smtpav03.fra02v.mail.ibm.com [10.20.54.102]) by smtprelay05.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 355BfaIw8651430 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 5 Jun 2023 11:41:36 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4392120043; Mon, 5 Jun 2023 11:41:36 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1197C20040; Mon, 5 Jun 2023 11:41:36 +0000 (GMT) Received: from heavy.boeblingen.de.ibm.com (unknown [9.155.209.184]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 5 Jun 2023 11:41:36 +0000 (GMT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding; s=pp1; bh=9J0STkllkCKubMz8qToQoNAhrz6iFSS4N2n+CRq2jnQ=; b=jWjn6CAFuednjq5/Dm5aaPnTC4LmOxrzXXOJAz6fAjIbYaJRdaPdMEPexSAPzPWlbWs/ 4apRSYF4SJVvXLAZSGQN+YDiBesqDjdNnws/YvU1FvHz9dZhlbXEvJk9i9Nn0/5XGLYt UrT9VoNnpjEHuzVs6qqczNkeBoYtrIHX4EXePP3OXNe8rGSs1vBF1IT73vS6nmxR6u6z oe6ZFyc86GoE4ZQfsw63AANQ3Dwto4BWB8SwXImgwwcWpouNDm6TK2uVocUERD6P0rAK e2kRSQ0IpUdKnqCHDJqiXfbulmab3pNi3qbKdLI/PhaCkFkJ8AvDszZFr9IHr894Ylig bg== From: Ilya Leoshkevich To: Richard Henderson , Paolo Bonzini Cc: qemu-devel@nongnu.org, Peter Maydell , Ilya Leoshkevich Subject: [PATCH] accel/tcg: Unmap perf_marker Date: Mon, 5 Jun 2023 13:41:34 +0200 Message-Id: <20230605114134.1169974-1-iii@linux.ibm.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-TM-AS-GCONF: 00 X-Proofpoint-GUID: tNat5HzhOq9c4qj_l9Za5xKt_OIDqpex X-Proofpoint-ORIG-GUID: d4tp8cIGGJ0ooOnb5i_ugymwba25TsxR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-03_08,2023-06-02_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxscore=0 bulkscore=0 priorityscore=1501 malwarescore=0 phishscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=978 adultscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2306050103 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.158.5; envelope-from=iii@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @ibm.com) X-ZM-MESSAGEID: 1685965349771100003 Content-Type: text/plain; charset="utf-8" Coverity complains that perf_marker is never unmapped. Fix by unmapping it in perf_exit(). Fixes: Coverity CID 1507929 Fixes: 5584e2dbe8c9 ("tcg: add perfmap and jitdump") Signed-off-by: Ilya Leoshkevich Reviewed-by: Richard Henderson --- accel/tcg/perf.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/accel/tcg/perf.c b/accel/tcg/perf.c index 65e35ea3b93..d1c3db10eda 100644 --- a/accel/tcg/perf.c +++ b/accel/tcg/perf.c @@ -111,6 +111,8 @@ static void write_perfmap_entry(const void *start, size= _t insn, } =20 static FILE *jitdump; +static size_t perf_marker_size; +static void *perf_marker =3D MAP_FAILED; =20 #define JITHEADER_MAGIC 0x4A695444 #define JITHEADER_VERSION 1 @@ -190,7 +192,6 @@ void perf_enable_jitdump(void) { struct jitheader header; char jitdump_file[32]; - void *perf_marker; =20 if (!use_rt_clock) { warn_report("CLOCK_MONOTONIC is not available, proceeding without = jitdump"); @@ -210,7 +211,8 @@ void perf_enable_jitdump(void) * PERF_RECORD_MMAP or PERF_RECORD_MMAP2 event is of the form jit-%d.d= ump * and will process it as a jitdump file. */ - perf_marker =3D mmap(NULL, qemu_real_host_page_size(), PROT_READ | PRO= T_EXEC, + perf_marker_size =3D qemu_real_host_page_size(); + perf_marker =3D mmap(NULL, perf_marker_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fileno(jitdump), 0); if (perf_marker =3D=3D MAP_FAILED) { warn_report("Could not map %s: %s, proceeding without jitdump", @@ -368,6 +370,11 @@ void perf_exit(void) perfmap =3D NULL; } =20 + if (perf_marker !=3D MAP_FAILED) { + munmap(perf_marker, perf_marker_size); + perf_marker =3D MAP_FAILED; + } + if (jitdump) { fclose(jitdump); jitdump =3D NULL; --=20 2.40.1