From owner-freebsd-testing@freebsd.org Tue Nov 24 18:17:11 2020 Return-Path: Delivered-To: freebsd-testing@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 574BD2ED909 for ; Tue, 24 Nov 2020 18:17:11 +0000 (UTC) (envelope-from mpbhargav@gmail.com) Received: from mail-qt1-x831.google.com (mail-qt1-x831.google.com [IPv6:2607:f8b0:4864:20::831]) (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 4CgXKy3zvkz53JL for ; Tue, 24 Nov 2020 18:17:10 +0000 (UTC) (envelope-from mpbhargav@gmail.com) Received: by mail-qt1-x831.google.com with SMTP id f93so16739887qtb.10 for ; Tue, 24 Nov 2020 10:17:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=dFf7kCDNKXNBlnzcyssbftJMm8sWffjuXAVz/z52Ejc=; b=LB9zW29TGPw5kVESvOIEqmyP0ANrflGH5QP5cq0BCPQMQzFjDh+xb7CUl2iFXAPPig wzNQk+iEb89vnAKSGAO0vyaM8G/B4aHhKJQZKetnUdT+iX+t/IIH3Z6OufvwRXPm+0/g IeEV0viv8zZKz5ZpK9CE+Cx7X2eDZMSn2xZZyA4gfNRkBUlcazFxeHJUFHErrwpWPr/p Sq1ouO2CEkJR9FwEvI1kJ4nljYN/aQSCwIJKOwMoiiIdo6WQZcx0Nt5cYT/9yoJnKpXL v23Yp+B12eyRX+kyepFRBWE0jyXsAb1dyCPKgO03GBedkxe85OJ56tPX7aHtYXqsEC9M xORA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=dFf7kCDNKXNBlnzcyssbftJMm8sWffjuXAVz/z52Ejc=; b=W1sOOy6Gnx2qdPY9+2l1GMyCIE0FOEcn0jX9Lh/080yJPs3lKujIKD4FeTa4b8eK/A szLRP+TlEdNznJALzy3ZkroHqXt7PDLVrqHYU9juMTWyNAxNVrsCzxwqtfjlTyWw9Chr 74oIFllJQVdyHvlr+GIDpUlxMNv4xtfJfEweeYlPhoJ2t8HsA44Qd0xTGeGnLjmQoJ33 5/CABQrY0nhMDZdoEZuxqFMOrjU9kb1qPJvkkU4Ns4HzHF5JZJKRPdD6z8H/B99Y020d 95df04SikfqEzXM1Y14kx56dIPWZdhCjdtuEkVLExz0+Q3u2DorTKTZwPHI7r+8wEbQc mNIQ== X-Gm-Message-State: AOAM530oL3Wl3lfBkzureFJSs/i+F+WuNo/q54ik96b3TY0FqbORBvpe Cs9zR5q6Va6JQXa958k/nKwtHF0oK0owZcvMmL4zo+w9UUA= X-Google-Smtp-Source: ABdhPJyfr5Whujc2Pi4Zp1hWM3JIPXS2ycHqwg1w8BUaWNek0lpoNbMew4gcWWjnFqJkMtSMx/cg6RRBsxqHtteKnHU= X-Received: by 2002:ac8:1013:: with SMTP id z19mr5492126qti.74.1606241829578; Tue, 24 Nov 2020 10:17:09 -0800 (PST) MIME-Version: 1.0 From: "bhargav M.P" Date: Tue, 24 Nov 2020 23:46:58 +0530 Message-ID: Subject: Memory mapped region is not present in core dump To: freebsd-testing@freebsd.org X-Rspamd-Queue-Id: 4CgXKy3zvkz53JL X-Spamd-Bar: --- Authentication-Results: mx1.freebsd.org; dkim=pass header.d=gmail.com header.s=20161025 header.b=LB9zW29T; dmarc=pass (policy=none) header.from=gmail.com; spf=pass (mx1.freebsd.org: domain of mpbhargav@gmail.com designates 2607:f8b0:4864:20::831 as permitted sender) smtp.mailfrom=mpbhargav@gmail.com X-Spamd-Result: default: False [-4.00 / 15.00]; FREEMAIL_FROM(0.00)[gmail.com]; R_SPF_ALLOW(-0.20)[+ip6:2607:f8b0:4000::/36]; TO_DN_NONE(0.00)[]; DKIM_TRACE(0.00)[gmail.com:+]; DMARC_POLICY_ALLOW(-0.50)[gmail.com,none]; NEURAL_HAM_SHORT(-1.00)[-1.000]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+,1:+,2:~]; RBL_DBL_DONT_QUERY_IPS(0.00)[2607:f8b0:4864:20::831:from]; FREEMAIL_ENVFROM(0.00)[gmail.com]; ASN(0.00)[asn:15169, ipnet:2607:f8b0::/32, country:US]; DWL_DNSWL_NONE(0.00)[gmail.com:dkim]; ARC_NA(0.00)[]; NEURAL_HAM_MEDIUM(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[gmail.com:s=20161025]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MIME_GOOD(-0.10)[multipart/alternative,text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-testing@freebsd.org]; RCPT_COUNT_ONE(0.00)[1]; SPAMHAUS_ZRD(0.00)[2607:f8b0:4864:20::831:from:127.0.2.255]; RCVD_IN_DNSWL_NONE(0.00)[2607:f8b0:4864:20::831:from]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[]; MAILMAN_DEST(0.00)[freebsd-testing] Content-Type: text/plain; charset="UTF-8" X-Content-Filtered-By: Mailman/MimeDel 2.1.34 X-BeenThere: freebsd-testing@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Testing on FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 24 Nov 2020 18:17:11 -0000 We have application software running on freebsd 10 and it has memory mapped region(mapped using mmap, used for IPC) and those addresses are not in the core file. Wierd thing is we don't see this when the core dump is collected using gcore and all the memory mapped region are present in the core file. But if the program crashes (seg fault or abort) the core dump doesn't contain memory mapped addresses. application software is NOT setting MAP_NOCORE when memory mapping. Why this behavior.?whats different when the core file collected when the program crashes.?