From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 3298E3858C35 for ; Mon, 27 Nov 2023 09:20:09 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 3298E3858C35 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 3298E3858C35 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1701076810; cv=none; b=wOvai2M8nUrv/X5RrzXNOiajU2n9WfBFRDerqIaGDVgVLYSR1GeFWLKOnIklbYQhbReKGl2D1m2bu6Vsalsl17vm9dhsO4edtcQNmJnxIq/iO4NxwrPRrE12phsh7zoEXou556+yuiNYj3OuE1MzpNm7UlTRakEjqhLKZKAlhXU= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1701076810; c=relaxed/simple; bh=lBPLIuMWdVd5l4CXamAm0hV3mB0SdVBLmehq6/QxoIE=; h=DKIM-Signature:From:To:Subject:Date:Message-ID:MIME-Version; b=g69EZTudC0xxt79nFIg2jE1PV6eGeDwhUT8auRnGXCPUuN4fmu6RnSnzFbablQGP6Bn7nA0rN0VHoimXq4lnFbwG/8XFoIhL5KrD5KIBH1SwzIbEQspKGoEzYsX5NRqquCs65xS60/nJ87xYDFfqcPVCdGUEkt/DcozyAdzvFwA= ARC-Authentication-Results: i=1; server2.sourceware.org DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1701076808; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=yeUdWaeTmiO8JeJXtsHqy09WEOMMEAqngkoQsx9KvMM=; b=E1t+i8bmPDS7wclUKKtgCwt7+4hd1iDdk7iectGCY9lJoUjf1E4ZbgnZdZvWuj+UmSbfrk zOvwHpGNEf5T1DEx3BIgCIXvL2uL9z8dTfHLfrRPwa68O/14S5Ogt/7drWlc2SXL2I7iT2 j/58eKU0xKLxyb4U7AwXYvs2ScXv510= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-612-_YqxCQdsPQ-_RLE5BDR0NA-1; Mon, 27 Nov 2023 04:20:05 -0500 X-MC-Unique: _YqxCQdsPQ-_RLE5BDR0NA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B85B484AE44; Mon, 27 Nov 2023 09:20:04 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.2.16.41]) by smtp.corp.redhat.com (Postfix) with ESMTPS id E0E1B1121307; Mon, 27 Nov 2023 09:20:03 +0000 (UTC) From: Florian Weimer To: Abhijit Ray Chaudhury via Libc-help Cc: Abhijit Ray Chaudhury Subject: Re: Does glibc support remote process backtracing References: Date: Mon, 27 Nov 2023 10:20:02 +0100 In-Reply-To: (Abhijit Ray Chaudhury via Libc-help's message of "Sat, 25 Nov 2023 11:32:30 +0530") Message-ID: <87o7ffpn7h.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.3 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.3 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_NONE,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: * Abhijit Ray Chaudhury via Libc-help: > Hi, > Libunwind supports remote process backtracing through libunwind-ptrace ( > https://www.nongnu.org/libunwind/man/libunwind-ptrace(3).html ). Does glibc > also support remote process backtracing ? For current architectures, glibc does not supply an implementation of stack unwinding/backtrace generatio. We use libgcc_s for that (via the unwind-link facility in glibc). There's no remote backtracing support in libgcc_s. There's a remote backtrace implementation in elfutils, which probably has a greater affinity with the GNU toolchain on Linux (compared to libunwind). Thanks, Florian