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:message-id:date:from:mime-version:to:subject :content-type; q=dns; s=default; b=POYhTC6AgC0hAJtfbbY+Cw+9rWMIP 7s2N9o9lslShcQLwIhxzjsHxhUMBCp+gAArZUjiKUtzrfATkTZ9/nnWD0wfx4il8 t48qL0UhNH0MQvG1n5lE2m9qaB45OZjL55AA/lJc0B8mvwI3BB0B+9l0S/6XkkT/ WGWwFi6C2wIJr8= 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:message-id:date:from:mime-version:to:subject :content-type; s=default; bh=Jq9oEWQ2tE9AqYYIdUfKL76FMvs=; b=sF2 W4aGv9mQyLoKIZrU0h5mfNE+Fw6TcN2Bz2RnSWM2+YleCKmidCxyHTKSl1GZGgxV G1SJLrIqNGiBhimRpOg8rjEAPBouxm07RnT/wQQgkN5aanOSt9AioTgyrTvQxZzS cRWRbjXTD4dxXS4cnashz5meqfI+u58DEjFkeS8g= 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 X-Spam-SWARE-Status: No, score=-2.2 required=5.0 tests=AWL,BAYES_00,KHOP_RCVD_UNTRUST,RCVD_IN_DNSWL_LOW,RCVD_IN_HOSTKARMA_NO,RCVD_IN_HOSTKARMA_YE,RP_MATCHES_RCVD,SPF_NEUTRAL autolearn=ham version=3.3.1 Message-ID: <5189627F.3050801@cs.utoronto.ca> Date: Tue, 07 May 2013 16:22:23 -0400 From: Ryan Johnson User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130328 Thunderbird/17.0.5 MIME-Version: 1.0 To: "cygwin AT cygwin DOT com" Subject: printf + pthreads+gdb+mintty = hang? Content-Type: multipart/mixed; boundary="------------000105000104060707010404" X-Virus-Found: No --------------000105000104060707010404 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Hi all, Running the attached STC inside gdb hangs (zero CPU util, have to kill gdb from Task Manager, killing a.exe doesn't cut it). Compile line used: g++ -Wall -g -mthreads -DBUG bug.cpp I currently have the following package versions: cygwin-1.7.18(0.263/5/3) 2013-04-19 mintty-1.1.3-1 gdb-7.6.50-1 gcc-4.5.3-3 The problem seems to be related to threads calling fprintf inside gdb, it runs fine from the command line, or with printf instead; both fprintf and printf sometimes trigger "warning: SuspendThread failed. (winerr 6)" (not sure if that matters). Known issue? Easy workaround? New bug? Thanks, Ryan --------------000105000104060707010404 Content-Type: text/plain; charset=windows-1252; name="bug.cpp" Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="bug.cpp" #include #include #if BUG #define P(fmt, ...) fprintf(stderr, fmt, ##__VA_ARGS__) #else #define P(fmt, ...) printf(fmt, ##__VA_ARGS__) #endif void* go(void *arg) { long tid = (long)arg; P("Thread %ld started\n", tid); for (int i=0; i < 100; i++) P("%ld\n", tid+i); P("Thread %ld exited\n", tid); return 0; } int main() { int tcount = 3; pthread_t tids[tcount]; for (int i=0; i < tcount; i++) pthread_create(&tids[i], 0, &go, (void*)(1000*i)); for (int i=0; i < tcount; i++) pthread_join(tids[i], 0); return 0; } --------------000105000104060707010404 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 --------------000105000104060707010404--