From nobody Tue Oct 5 20:34:34 2021 X-Original-To: questions@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 C191012BF5B0 for ; Tue, 5 Oct 2021 20:35:23 +0000 (UTC) (envelope-from tomek@cedro.info) Received: from mail-oo1-xc35.google.com (mail-oo1-xc35.google.com [IPv6:2607:f8b0:4864:20::c35]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (2048 bits) client-digest SHA256) (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4HP8V263WLz3KGc for ; Tue, 5 Oct 2021 20:35:22 +0000 (UTC) (envelope-from tomek@cedro.info) Received: by mail-oo1-xc35.google.com with SMTP id b5-20020a4ac285000000b0029038344c3dso176581ooq.8 for ; Tue, 05 Oct 2021 13:35:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cedro.info; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=+qQpE3tVbVMxde/Ht3f4XuOuJjJnZzYDIPNUt19xDYw=; b=KoZeOuyXrx8o87fXL5CEMDh/y2SM2Bin00edjIdxlY7BicU2Wn7pvq+qj3HBhrRFHN MEYOEylrWlvswT+SkFhy2H0qYFACyZqJZ85qZ/OXqRAs56v9vGx9cmKDI3lcoyZThvId v4qMMq6PilDkvU8/RAPel9yObolLwny7a5GwHhjBHYo5GT9ooNDbtpLOkUr8XI4On+jl zMzY3WtzBRycwj19pF2xpF56Y1WfUrefo+xDry9QRaVBqMOdigcnF0RcDYq5N5sMkK4i 1agwzbN6Flw6DktH5pHqmY76TyjSpotuX5DmdojDFLGgQb1jAzo5l+r26gyKLLVk10aZ loGw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=+qQpE3tVbVMxde/Ht3f4XuOuJjJnZzYDIPNUt19xDYw=; b=rV/Gu3ypsJTEaEsLTyGFFEj3eP3TmdY3/Bi6XqOJJ/lrpfQsFHFYWDk4Dprnn5YI5T 8VRWtpIpi12pCNNPIlujU/FP9aFmA/u4DbqzQ5YKGWc5Uu4yOCzg+It4NMSdVCCkDGoz 3jdSqfxBnv4+UYkxLlrplMsridHExLl4fXA1qTCsaXZieI8KtVH5cp0PXRDy/0BrIDVK tzXvYJ/kVvRRd1X0dEZjr3q3IUf9ys0Cjd4oRBAnIUmLaOZR49zrSw9l4BveKXoGpFXf aJMTK1V91ao0kk50FXS0js7TyDp4TOxszkgEyNR6dHocvIhz5dsG3wHrsYXoho0QLCJx aYsA== X-Gm-Message-State: AOAM531QKRNbrpOQUoSEd8pOs1z64QRvdc7nbgeeBCS/v3pRAHR0HZxa t1iyIDDR5aIk5H4RaXDGVAAzNyDjv0TfHk3QdcrmPoNeBSvhCA== X-Google-Smtp-Source: ABdhPJxC+ihzPGkOgIiaylBvzCbRDT4xpqgA8jZIIaj+D3i5OI2JVDshojKDMJZOftx56KiF/YDuHiCO/cNA9fBbLfI= X-Received: by 2002:a4a:9510:: with SMTP id m16mr15058765ooi.14.1633466122018; Tue, 05 Oct 2021 13:35:22 -0700 (PDT) List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-questions@freebsd.org X-BeenThere: freebsd-questions@freebsd.org MIME-Version: 1.0 References: In-Reply-To: From: Tomasz CEDRO Date: Tue, 5 Oct 2021 22:34:34 +0200 Message-ID: Subject: Re: How do I get a coredump file from an application? To: Odhiambo Washington Cc: questions Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 4HP8V263WLz3KGc X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=cedro.info header.s=google header.b=KoZeOuyX; dmarc=none; spf=none (mx1.freebsd.org: domain of tomek@cedro.info has no SPF policy when checking 2607:f8b0:4864:20::c35) smtp.mailfrom=tomek@cedro.info X-Spamd-Result: default: False [-2.30 / 15.00]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[cedro.info:s=google]; FROM_HAS_DN(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[questions@freebsd.org]; DMARC_NA(0.00)[cedro.info]; TO_MATCH_ENVRCPT_SOME(0.00)[]; TO_DN_ALL(0.00)[]; DKIM_TRACE(0.00)[cedro.info:+]; RCPT_COUNT_TWO(0.00)[2]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::c35:from]; NEURAL_HAM_SHORT(-1.00)[-0.999]; R_SPF_NA(0.00)[no SPF record]; FREEMAIL_TO(0.00)[gmail.com]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; SUBJECT_ENDS_QUESTION(1.00)[]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-ThisMailContainsUnwantedMimeParts: N On Mon, Oct 4, 2021 at 9:45 AM Odhiambo Washington wrote: > I have my MTA (Exim) crushing, with the following message in its panic.log: > (...) > I need to obtain a coredump file from the crashing process for debugging > purposes. Have you tried running your application under gdb / lldb? That may help you tracing the problem on a live application, you can backtrace after crash to see where problem occurred, you can set breakpoint before problem happens and step by step see why problem occurs, just remember to compile application in debug mode with debug symbols enabled so you will trace source code not the assembly :-) Here is some stuff that may help: https://forums.freebsd.org/threads/how-to-enable-system-daemons-core-dumps.76500/ https://www.freebsd.org/cgi/man.cgi?query=dtrace&sektion=1&manpath=freebsd-release-ports https://www.freebsd.org/cgi/man.cgi?query=core&sektion=5&manpath=freebsd-release-ports https://wiki.freebsd.org/lldb https://www.gnu.org/software/gdb/documentation/ https://www.cs.umd.edu/~srhuang/teaching/cmsc212/gdb-tutorial-handout.pdf -- CeDeROM, SQ7MHZ, http://www.tomek.cedro.info