X-Recipient: archive-cygwin AT delorie DOT com DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:reply-to:in-reply-to:references :from:date:message-id:subject:to:content-type; q=dns; s=default; b= bSKdAZaQu61YurktrYTH5ISBvQ1UW0z34Dg6Ygt336QW49C6zuP33939Xv1Ib27h t6pv6GhhPMkpO2E5bkEcT9KMi0po1azXr8qNNVfRZvtOTVLGfFMFs2TSHc3sD8TR WT3v3EZ9x7KuSLL0PnVAyeloFmRZ5E4jzr+BBMNUGrE= DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id :list-unsubscribe:list-subscribe:list-archive:list-post :list-help:sender:mime-version:reply-to:in-reply-to:references :from:date:message-id:subject:to:content-type; s=default; bh=joM RkoDTtJxX9XCtT2l2KI37NeA=; b=GKeFRLwwxrli4iRBLzN4JP8mIh9JFHBiJDZ q/sfuwn9VMbVOvCUhYNoCaYiPOvoDNk7O0jHw9L0sdN7Py6jmVQsIZgbLBv3iI74 mX1uwuNLszg8QfCPZCdOYyPCDjZHh1Wn69jk/lOV70vxuSplCAslSC0RNlJksTH/ JRjRSFvQ= Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.1 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,RCVD_IN_DNSWL_LOW,SPF_PASS autolearn=ham version=3.3.2 X-HELO: mail-wi0-f172.google.com X-Received: by 10.180.184.134 with SMTP id eu6mr10629671wic.77.1441651560055; Mon, 07 Sep 2015 11:46:00 -0700 (PDT) MIME-Version: 1.0 Reply-To: fracting AT gmail DOT com In-Reply-To: References: From: Qian Hong Date: Tue, 8 Sep 2015 02:45:20 +0800 Message-ID: Subject: Re: Question about flock - potential memory corruption? To: cygwin Content-Type: multipart/mixed; boundary=001a11c34ade20a6fa051f2ca903 X-IsSubscribed: yes --001a11c34ade20a6fa051f2ca903 Content-Type: text/plain; charset=UTF-8 Hi, Attach is the simple test case I use to reproduce the valgrind warning and random failures. Compile the test case in Cygwin with below command line: $ gcc -g -O0 flock.c -o flock.exe Thanks! --001a11c34ade20a6fa051f2ca903 Content-Type: text/x-csrc; charset=US-ASCII; name="flock.c" Content-Disposition: attachment; filename="flock.c" Content-Transfer-Encoding: base64 X-Attachment-Id: f_ieaa1xuy0 LyoqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioq KioqKioqKioqKioqKioqKioqKioqKioqKioqCiAqIFRoaXMgaXMgYSBTVEMg dGhhdCBjYXVzZXMgdGhlIGZvbGxvd2luZyBlcnJvciBvbiBteSB0ZXN0IG1h Y2hpbmU6CiAqICAgTnRDcmVhdGVFdmVudChsb2NrKTogMHhDMDAwMDAzNQog KgogKiBJdCB0cmllcyB0byB1c2UgZmxvY2soKSBmb3IgZmlsZSBsb2NraW5n LiBJdCBjcmVhdGVzIGEgdGVtcG9yYXJ5CiAqIGZpbGUsIHRoZSB1c2VzIGZv cmsgdG8gc3Bhd24gYSBudW1iZXIgb2YgY2hpbGRyZW4uIEVhY2ggY2hpbGQg b3BlbnMKICogdGhlIGZpbGUsIHRoZW4gcmVwZWF0ZWRseSB1c2VzIGZsb2Nr IHRvIGxvY2sgYW5kIHVubG9jayBpdC4KICoKICogVGhpcyB0ZXN0IHdhcyBl eHRyYWN0ZWQgZnJvbSB0aGUgQVBSIHRlc3Qgc3VpdGUuCiAqCiAqIENvbXBp bGU6IGdjYyAtV2FsbCAtbyBzdGMtZmxvY2stZm9yayBzdGMtZmxvY2stZm9y ay5jCiAqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKioq KioqKioqKioqKioqKioqKioqKioqKioqKioqKioqKi8KCiNpbmNsdWRlIDxz eXMvdHlwZXMuaD4KI2luY2x1ZGUgPHN5cy9maWxlLmg+CiNpbmNsdWRlIDxz eXMvd2FpdC5oPgoKI2luY2x1ZGUgPHN0ZGlvLmg+CiNpbmNsdWRlIDxzdGRs aWIuaD4KI2luY2x1ZGUgPGZjbnRsLmg+CiNpbmNsdWRlIDx1bmlzdGQuaD4K I2luY2x1ZGUgPGVycm5vLmg+CgojZGVmaW5lIE1BWF9JVEVSIDIwMDAKI2Rl ZmluZSBDSElMRFJFTiA2CgovKiBBIHRlbXBvcmFyeSBmaWxlIHVzZWQgZm9y IGZsb2NrLiAqLwpjaGFyIHRtcGZpbGVuYW1lW10gPSAiL3RtcC9mbG9ja3Rz dFhYWFhYWCI7CgppbnQgbWFpbihpbnQgYXJnYywgY29uc3QgY2hhciAqIGNv bnN0ICogYXJndiwgY29uc3QgY2hhciAqIGNvbnN0ICplbnYpCnsKICAgIGlu dCBmZDsKIAogICAgLyogQ3JlYXRlIHRoZSB0ZW1wb3JhcnkgZmlsZS4gKi8K ICAgIGZkID0gbWtzdGVtcCh0bXBmaWxlbmFtZSk7CiAgICBpZiAoZmQgPCAw KSB7CiAgICAgICAgcGVycm9yKCJvcGVuIGZhaWxlZCIpOwogICAgICAgIGV4 aXQoMSk7CiAgICB9CiAgICBjbG9zZShmZCk7CglpbnQgZmQyID0gb3Blbih0 bXBmaWxlbmFtZSwgT19SRE9OTFkpOwoJaW50IHJjOwoJaW50IGk7CglyYyA9 IGZsb2NrKGZkMiwgTE9DS19FWCk7CglyZXR1cm4gMDsKfQo= --001a11c34ade20a6fa051f2ca903 Content-Type: text/plain; charset=us-ascii -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple --001a11c34ade20a6fa051f2ca903--