From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 70D91137764; Tue, 25 Jun 2024 12:02:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719316950; cv=none; b=euEiQ8zmpm5jm9Gxz8yb8AmjD5F2E4CqeucuZPRh8yHLUrWLl6ldXvw81Akj+6ssVIIDgd6X8pIgqUc7llrqiYCrae895QDtB9CQ4dDV96gHJxKrCeNfYJ+oa5kdQQPby//xtzWUU/MCC9eEZBGho6CHSRKOzsGWLwDy/cDTFdQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719316950; c=relaxed/simple; bh=B9l0BIayFtO54fFICK7mPu8xZAkJYHVx2FObwn9vcM8=; h=Message-ID:Date:MIME-Version:Subject:From:To:Cc:References: In-Reply-To:Content-Type; b=b1l6z1h+zshGkheJZznzUfQNZ2jUCb3K3scmVTXx7KqAp/EWxwsOSB2RJWd5dgPEeFT/9Tr1mB0+5gyTt4ES6b96F5S9IbSHp9ABW0Y/725r3yBYCgli0P5Dx1uRmtUgNVQQlbmpHEOFDc/OJmX3tW1QWWXhVGaXWmThbHaU3MY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=F5lfA1qV; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="F5lfA1qV" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1719316949; x=1750852949; h=message-id:date:mime-version:subject:from:to:cc: references:in-reply-to:content-transfer-encoding; bh=B9l0BIayFtO54fFICK7mPu8xZAkJYHVx2FObwn9vcM8=; b=F5lfA1qV3RG0hxb99/oW/4Lu1KmgPGz+qEPMxSOiK7kdTYwEkSo94yVF u+N5dynhXrcoY7gJkz+BiNporo/SlmsY8HAHQhby/M5VPqYjA+NjNypuk dxkheHHsabD1JGF5121fnjQL1XDj6G6Ta70SZKXHq/Kc6dzDrxzQZxtXq wK09migvQaX19awpybVWn1yUFSVRlk7ZYyPRxwdw8yrAfm2dO2Yy9m/1E mJ4iEOsCeQwKzaZtPB1E5d4aXwvLHjiokkwD+f487HHgCziGKVm/8uApQ UMm55qZ4yBiEEkdXnL48g2SnI9k4ofIVtOu9+/1IJk8C4X710sCoHUS4G A==; X-CSE-ConnectionGUID: Sl/2r9CDS7G7wU/xhFNf+Q== X-CSE-MsgGUID: Ilo0QdrdTw2ZLozOlomrDg== X-IronPort-AV: E=McAfee;i="6700,10204,11113"; a="33784979" X-IronPort-AV: E=Sophos;i="6.08,264,1712646000"; d="scan'208";a="33784979" Received: from fmviesa010.fm.intel.com ([10.60.135.150]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2024 05:02:19 -0700 X-CSE-ConnectionGUID: 63BfM6SNScqsG5vTAhBsww== X-CSE-MsgGUID: yh+tJ62YRA2xCkNXkbfKtg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,264,1712646000"; d="scan'208";a="43734681" Received: from gcivario-mobl.ger.corp.intel.com (HELO [10.0.2.15]) ([10.246.48.191]) by fmviesa010-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Jun 2024 05:02:15 -0700 Message-ID: Date: Tue, 25 Jun 2024 15:02:11 +0300 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V4 1/3] tools/perf: Fix the string match for "/tmp/perf-$PID.map" files in dso__load From: Adrian Hunter To: Athira Rajeev , acme@kernel.org, jolsa@kernel.org, irogers@google.com, namhyung@kernel.org Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, akanksha@linux.ibm.com, maddy@linux.ibm.com, kjain@linux.ibm.com, disgoel@linux.vnet.ibm.com References: <20240623064850.83720-1-atrajeev@linux.vnet.ibm.com> <722cb4bc-89d4-4e03-a80d-ffe05be52c05@intel.com> Content-Language: en-US Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki, Business Identity Code: 0357606 - 4, Domiciled in Helsinki In-Reply-To: <722cb4bc-89d4-4e03-a80d-ffe05be52c05@intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 25/06/24 14:57, Adrian Hunter wrote: > On 23/06/24 09:48, Athira Rajeev wrote: >> Perf test for perf probe of function from different CU fails >> as below: >> >> ./perf test -vv "test perf probe of function from different CU" >> 116: test perf probe of function from different CU: >> --- start --- >> test child forked, pid 2679 >> Failed to find symbol foo in /tmp/perf-uprobe-different-cu-sh.Msa7iy89bx/testfile >> Error: Failed to add events. >> --- Cleaning up --- >> "foo" does not hit any event. >> Error: Failed to delete events. >> ---- end(-1) ---- >> 116: test perf probe of function from different CU : FAILED! >> >> The test does below to probe function "foo" : >> >> # gcc -g -Og -flto -c /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-foo.c >> -o /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-foo.o >> # gcc -g -Og -c /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-main.c >> -o /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-main.o >> # gcc -g -Og -o /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile >> /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-foo.o >> /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile-main.o >> >> # ./perf probe -x /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile foo >> Failed to find symbol foo in /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7/testfile >> Error: Failed to add events. >> >> Perf probe fails to find symbol foo in the executable placed in >> /tmp/perf-uprobe-different-cu-sh.XniNxNEVT7 >> >> Simple reproduce: >> >> # mktemp -d /tmp/perf-checkXXXXXXXXXX >> /tmp/perf-checkcWpuLRQI8j >> >> # gcc -g -o test test.c >> # cp test /tmp/perf-checkcWpuLRQI8j/ >> # nm /tmp/perf-checkcWpuLRQI8j/test | grep foo >> 00000000100006bc T foo >> >> # ./perf probe -x /tmp/perf-checkcWpuLRQI8j/test foo >> Failed to find symbol foo in /tmp/perf-checkcWpuLRQI8j/test >> Error: Failed to add events. >> >> But it works with any files like /tmp/perf/test. Only for >> patterns with "/tmp/perf-", this fails. >> >> Further debugging, commit 80d496be89ed ("perf report: Add support >> for profiling JIT generated code") added support for profiling JIT >> generated code. This patch handles dso's of form >> "/tmp/perf-$PID.map" . >> >> The check used "if (strncmp(self->name, "/tmp/perf-", 10) == 0)" >> to match "/tmp/perf-$PID.map". With this commit, any dso in >> /tmp/perf- folder will be considered separately for processing >> (not only JIT created map files ). Fix this by changing the >> string pattern to check for "/tmp/perf-%d.map". Add a helper >> function is_perf_pid_map_name to do this check. In "struct dso", >> dso->long_name holds the long name of the dso file. Since the >> /tmp/perf-$PID.map check uses the complete name, use dso___long_name for >> the string name. >> >> With the fix, >> # ./perf test "test perf probe of function from different CU" >> 117: test perf probe of function from different CU : Ok >> >> Signed-off-by: Athira Rajeev > > Reviewed-by: Adrian Hunter > Although it could use a Fixes tag