From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from NAM10-BN7-obe.outbound.protection.outlook.com (mail-bn7nam10olkn2109.outbound.protection.outlook.com [40.92.40.109]) by sourceware.org (Postfix) with ESMTPS id 59F4D386F03C for ; Tue, 10 Nov 2020 20:19:23 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 59F4D386F03C ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=SiEQoYyWgQ0UfqOJ+5rRMP7aY+f4wlYfMVEGsC1TdvfGE73a4+U8PEzBRDxN1LwmeTymcaMBTHrjvY+lOkWtVkdQdq35XrXqH4wvZ/VHYeU67b9pn4DOdk5l/9JPNiftRSZGXhDnnqL/BhnDqfaOoNE1xMvqtAyqOdl4qq08lr00Nxkz8ye5+vwuGyjih8nXpviMTdGkMcvGmiVNGjdwSbjKgQVrdC/JQlp+ptoEiGSHFH3AXHTCzrs6fhkNBQaoSlj3UTe3AhxqAO/MUj6Xr0HC20llHeIOjwMOlL9IF9G4wszArsR3EK7ak+SLBZoYp6OSGrefdBuHRrUtU9qVgA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=ahV6xdH2dpMl2KU51G1WTUzvNisojsS+p3TfaDw9o/w=; b=Pt8M6BE7gKkqs9eQbOinW0mWoKs1mRrMlXA5Au5wcOc7T3JhTapL0dgoSQtmny41IXDN9hYLevojAxXaZaTFatRddwB4gMzZR1sen3dyNK17o48N6T2HAgMl0RIMYItpq5BYJzwCHjsx9tNBC5IjSm/4k5ALxDPNYzbdsC6DNUZcXgac6Fd0ZjCqWyNdjlW0w9ca4CzdY5Z9lQMsmHgZy9V3W/+Nd25UZs65AMzUEDu7nah0Z3hwWXopHxJf4DUYuhxCliss/lm/H7tvmePH88FmZH8c5GW3lOe/gbx67Ep9mDbYXlGpFnfd4QZMA5ypW9H9RCuvfFARp31G+6dF0A== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=none; dmarc=none; dkim=none; arc=none Received: from BN7NAM10FT063.eop-nam10.prod.protection.outlook.com (2a01:111:e400:7e8f::4f) by BN7NAM10HT200.eop-nam10.prod.protection.outlook.com (2a01:111:e400:7e8f::104) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3541.22; Tue, 10 Nov 2020 20:19:22 +0000 Received: from CS1PR8401MB0903.NAMPRD84.PROD.OUTLOOK.COM (2a01:111:e400:7e8f::4c) by BN7NAM10FT063.mail.protection.outlook.com (2a01:111:e400:7e8f::171) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.3541.22 via Frontend Transport; Tue, 10 Nov 2020 20:19:22 +0000 Received: from CS1PR8401MB0903.NAMPRD84.PROD.OUTLOOK.COM ([fe80::6400:2812:a14f:a2]) by CS1PR8401MB0903.NAMPRD84.PROD.OUTLOOK.COM ([fe80::6400:2812:a14f:a2%9]) with mapi id 15.20.3541.025; Tue, 10 Nov 2020 20:19:21 +0000 From: Siva N To: "systemtap@sourceware.org" Subject: stap --dyninst with C++ applications Thread-Topic: stap --dyninst with C++ applications Thread-Index: AQHWt540TqKWcM//6E6prEE8hSET0g== Date: Tue, 10 Nov 2020 20:19:21 +0000 Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-incomingtopheadermarker: OriginalChecksum:A0546D0AA2D2FCE44620F4E8FD05FB2236C2455D85A883223A3BCF19C1DC65A2; UpperCasedChecksum:1BEEF5790DE477B7B0AF4DC786410E770289EE55C89B15A69E41DE3AF1032116; SizeAsReceived:6622; Count:41 x-tmn: [EggDdn7hp+ZPmsPOYA9ih2eaQWYJ+HPC] x-ms-publictraffictype: Email x-incomingheadercount: 41 x-eopattributedmessage: 0 x-ms-office365-filtering-correlation-id: 9edb8549-8dac-4949-5e5b-08d885b5e923 x-ms-traffictypediagnostic: BN7NAM10HT200: x-microsoft-antispam: BCL:0; x-microsoft-antispam-message-info: 5AkYHDZV+PfPGKwhD+v7pLwCD9r0NjSb90EZJp3TAh2CvX/P9a5dXwEiO5tFu6cm/fZdQESiCM/s1h8G9z5QJBY1GW042tQMeBjAQ2RvNp5z6LghxQwCQ+sZMUk7Tx+iIYHB1FqDCPiiTTZ7VUEnj9Wz3pB6qzH+3dd0IVlqIaOU/ML1zDZj8cJ/qgdAOCWkK8xvWhkGkoYwMCBTnhGIdw== x-ms-exchange-antispam-messagedata: 9kDgQEaHqxCaFKa2QmrMdbvKIdHRe7wT7FiSBa9IAJ4N1rRt0uA+MC/63Gunq7SnuD9UFJaipblCzcmHBqY0sNZG6KbEbQBtL5wH6bGxQkeMPzdLPGhyA7jYasDJnr8oFgmK2zmy+EHhQQyUJ7AVgw== x-ms-exchange-transport-forked: True MIME-Version: 1.0 X-OriginatorOrg: outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-AuthSource: BN7NAM10FT063.eop-nam10.prod.protection.outlook.com X-MS-Exchange-CrossTenant-RMS-PersistedConsumerOrg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-CrossTenant-Network-Message-Id: 9edb8549-8dac-4949-5e5b-08d885b5e923 X-MS-Exchange-CrossTenant-originalarrivaltime: 10 Nov 2020 20:19:21.8659 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-CrossTenant-rms-persistedconsumerorg: 00000000-0000-0000-0000-000000000000 X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN7NAM10HT200 X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, HTML_MESSAGE, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 X-BeenThere: systemtap@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Systemtap mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Nov 2020 20:19:24 -0000 Hi, I am curious to understand how C++ object arguments are handled with USDT. I have a C++ application. I have added probe points using the DTRACE_PROBE[= n] macro. If I pass a reference/pointer to a C++ object as one of the argum= ents, I wonder how one accesses this inside the probe handler. I could trea= t the argument(s) as a void pointer, and if I managed create the actual C++= object layout, I guess I could access the data. But I was wondering if the= re were any other suggestions or examples. Thanks!