Date: Mon, 24 May 2010 13:13:05 GMT From: HaiYu Wu <cfishwu@corp.netease.com> To: freebsd-gnats-submit@FreeBSD.org Subject: threads/146917: open(), accept() are not thread safe Message-ID: <201005241313.o4ODD5gD050615@www.freebsd.org> Resent-Message-ID: <201005241320.o4ODK1xI020934@freefall.freebsd.org>
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>Number: 146917 >Category: threads >Synopsis: open(), accept() are not thread safe >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-threads >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Mon May 24 13:20:00 UTC 2010 >Closed-Date: >Last-Modified: >Originator: HaiYu Wu >Release: FreeBSD 7.3-RELEASE >Organization: Netease Inc. >Environment: FreeBSD onlinegame-10-183 7.3-RELEASE FreeBSD 7.3-RELEASE #0: Sun Mar 21 06:15:01 UTC 2010 root@walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 >Description: My Application is in Freebsd 7.3, has two threads. use -pthread options to gcc(gcc 4.2.1). the Threads's breif flow as bellow: Thread A: is the main thread which deal with the connections, accept connection, read connection and make a request to push into a queue. Thread B: is the work thread which wait for request from the queue, and deal with it. when dealing with the request, sometimes will open a file to write some data. I use system call open() to open file and write(), mostly, both of threads work well. but sometimes write() is failed and the errno is 9. If I migrate the open() operation to the main thread A, never open() in the Thread B, the failure is disappear. So, I doubt that some system call , such as accep(), open(), fopen() which operate the File Descriptor are not thread safe. Is this True ? >How-To-Repeat: above mentioned >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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