From nobody Sun Feb 20 06:21:38 2022 X-Original-To: freebsd-dtrace@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 9CAE319D74CC for ; Sun, 20 Feb 2022 06:22:00 +0000 (UTC) (envelope-from farhan@farhan.codes) Received: from wforward2-smtp.messagingengine.com (wforward2-smtp.messagingengine.com [64.147.123.31]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4K1b1g6HFbz3hfM for ; Sun, 20 Feb 2022 06:21:59 +0000 (UTC) (envelope-from farhan@farhan.codes) Received: from compute1.internal (compute1.nyi.internal [10.202.2.41]) by mailforward.west.internal (Postfix) with ESMTP id D77571AC2386 for ; Sun, 20 Feb 2022 01:21:58 -0500 (EST) Received: from imap45 ([10.202.2.95]) by compute1.internal (MEProxy); Sun, 20 Feb 2022 01:21:59 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-type:date:date:from:from :in-reply-to:message-id:mime-version:reply-to:sender:subject :subject:to:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm2; bh=RTaBfBMEiXIFubAhbEsEz8B2TmJloZ6E5nBG85vaQ k4=; b=W+JOWxxhRgGmzspKXPwUbiufLp3vdEL0Dryi1yAHgR4Ay885PNJBGcj8a BY3Gdwnv2kw1br8rUzhA4cUKThRd+xwaSFK2dsCZ/M+lOdi1exJX2HYLAK5SqDFJ +A8a0/1fuT8rXlMBqMmmWkMOfPHn4kpGiogoJ+Qzx+pPYpgSoFfu2uQoraRky6xg c8vov8gSBsijj3Mr9P+6bAG+5/kB6fnMJdBhMiBfrzHgdBuvS5rWqdGrKXIS2DqB y0XQhhqje2eTpUTTy28O+tKwoBAgFeo2nBq3PkrAh4HeqmWL5Rzkq5noUdcC3jGx m6/x9A1rlUbrnGvHG571yvsU1RU/Q== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrkeefgdelgecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhepofgfggfkfffhvffutgesthdtredtre ertdenucfhrhhomhepfdfhrghrhhgrnhcumfhhrghnfdcuoehfrghrhhgrnhesfhgrrhhh rghnrdgtohguvghsqeenucggtffrrghtthgvrhhnpeeijedtgeetvefhgedvfeeigeehte fhudduffekveffjeeugeduveefffduvdehgeenucevlhhushhtvghrufhiiigvpedtnecu rfgrrhgrmhepmhgrihhlfhhrohhmpehfrghrhhgrnhesfhgrrhhhrghnrdgtohguvghs X-ME-Proxy: Received: by mailuser.nyi.internal (Postfix, from userid 501) id 481C824A007C; Sun, 20 Feb 2022 01:21:58 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.5.0-alpha0-4778-g14fba9972e-fm-20220217.001-g14fba997 List-Id: A discussion list for developers working on DTrace in FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-dtrace List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-dtrace@freebsd.org Mime-Version: 1.0 Message-Id: <601aef51-3402-43fe-b44c-8c2976a4f777@www.fastmail.com> Date: Sun, 20 Feb 2022 01:21:38 -0500 From: "Farhan Khan" To: freebsd-dtrace@freebsd.org Subject: Read return struct of kernel trace Content-Type: text/plain X-Rspamd-Queue-Id: 4K1b1g6HFbz3hfM X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=messagingengine.com header.s=fm2 header.b=W+JOWxxh; dmarc=none; spf=none (mx1.freebsd.org: domain of farhan@farhan.codes has no SPF policy when checking 64.147.123.31) smtp.mailfrom=farhan@farhan.codes X-Spamd-Result: default: False [-3.39 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[messagingengine.com:s=fm2]; XM_UA_NO_VERSION(0.01)[]; FROM_HAS_DN(0.00)[]; MV_CASE(0.50)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-dtrace@freebsd.org]; TO_DN_NONE(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; RCPT_COUNT_ONE(0.00)[1]; DWL_DNSWL_LOW(-1.00)[messagingengine.com:dkim]; RCVD_COUNT_THREE(0.00)[4]; DMARC_NA(0.00)[farhan.codes]; DKIM_TRACE(0.00)[messagingengine.com:+]; NEURAL_HAM_SHORT(-1.00)[-1.000]; MLMMJ_DEST(0.00)[freebsd-dtrace]; R_SPF_NA(0.00)[no SPF record]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; RCVD_TLS_LAST(0.00)[]; ASN(0.00)[asn:29838, ipnet:64.147.123.0/24, country:US]; MID_RHS_WWW(0.50)[]; RCVD_IN_DNSWL_LOW(-0.10)[64.147.123.31:from] X-ThisMailContainsUnwantedMimeParts: N Hi all, I am trying to instrument the return value of usbd_get_endpoint(), which is a "struct usb_endpoint" defined in /usr/src/sys/dev/usb/usbdi.h. I would like to print out the contents of the struct in a human-readable way. To that end, I am trying to include the header file into my dtrace script but keep getting error messages from dtrace. My script is as follows: ------------ #!/usr/sbin/dtrace -qvs #include fbt::usbd_get_endpoint:return { printf("Exit %d\n", arg0); } ------------ [farhan@freebsddev ~]$ sudo dtrace -C ./usbd_get_endpoint.d dtrace: no probes specified [farhan@freebsddev ~]$ sudo dtrace -sC ./usbd_get_endpoint.d dtrace: failed to open C: No such file or directory [farhan@freebsddev ~]$ sudo dtrace ./usbd_get_endpoint.d dtrace: no probes specified I am not certain how to resolve this issue. Also, if it is not necessary to include the header to print out the structure, please suggest an alternative method. Thank you! -- Farhan Khan