From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 26346 invoked by alias); 1 Sep 2003 16:26:18 -0000 Mailing-List: contact gdb-help@sources.redhat.com; run by ezmlm Precedence: bulk List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sources.redhat.com Received: (qmail 26338 invoked from network); 1 Sep 2003 16:26:17 -0000 Received: from unknown (HELO nevyn.them.org) (66.93.172.17) by sources.redhat.com with SMTP; 1 Sep 2003 16:26:17 -0000 Received: from drow by nevyn.them.org with local (Exim 4.22 #1 (Debian)) id 19trVQ-0001x7-GZ; Mon, 01 Sep 2003 12:26:16 -0400 Date: Mon, 01 Sep 2003 16:26:00 -0000 From: Daniel Jacobowitz To: Balarama Krishna Cc: gdb@sources.redhat.com Subject: Re: pthread_create, Program received signal ?, Unknown signal Message-ID: <20030901162616.GB7465@nevyn.them.org> Mail-Followup-To: Balarama Krishna , gdb@sources.redhat.com References: <1062421948.1343.136.camel@Lotus> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1062421948.1343.136.camel@Lotus> User-Agent: Mutt/1.5.1i X-SW-Source: 2003-09/txt/msg00003.txt.bz2 On Mon, Sep 01, 2003 at 06:42:29PM +0530, Balarama Krishna wrote: > Hi, > > I am trying to debug a multi-threaded application on arm-linux target > from i386-linux host using GDB-5.3. You seem to be using glibc 2.3.x. Am I right? If so, try CVS gdb instead. A change in the definition of SIGRTMIN causes this symptom. > > I am using gcc(3.2.3) and using the same set of shared libraries (came > with gcc(3.2.3)on the target also in order to run gdbserver. > > Below is my sample application > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > 1 #include > 2 #include > 3 > 4 void * call_back(void *); > 5 int main() > 6 { > 7 int count=0; > 8 pthread_t thread_id; > 9 if ( pthread_create(&thread_id, NULL, call_back, NULL) > != 0){ > 10 perror("pthread_create() Failed"); > 11 return 0; > 12 } > 13 while(1){ > 14 count++; > 15 sleep(1); > 16 printf("Main Thread Count (%d) \n", count); > 17 } > 18 } > 19 void * call_back(void *arg) > 20 { > 21 int count=0; > 22 while(1){ > 23 count++; > 24 sleep(3); > 25 printf("Thread Loop count (%d) \n", count); > 26 } > 27 } > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > > Screen shot on the HOST side > > /%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%/ > GNU gdb 5.3 > Copyright 2002 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you > are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for > details. > This GDB was configured as "--host=i686-pc-linux-gnu > --target=arm-linux". > (gdb) et solib-absolute-prefix /dev/null > Undefined command: "et". Try "help". > (gdb) set solib-absolute-prefix /dev/null > (gdb) set solib-search-path /home/balaram/links_to_lib_dir > (gdb) file threads > Reading symbols from threads...done. > (gdb) target remote 107.108.3.197:2020 > Remote debugging using 107.108.3.197:2020 > 0x40002560 in ?? () > (gdb) break 9 > Breakpoint 1 at 0x84d0: file threads.c, line 9. > (gdb) cont > Continuing. > > Breakpoint 1, main () at threads.c:9 > 9 if ( pthread_create(&thread_id, NULL, call_back, NULL) > != 0){ > (gdb) n > > Program received signal ?, Unknown signal. > 0x4005b3a4 in ?? () > (gdb) > /%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%/ > > > On the Target Side, the child thread got created and this is the > following screen shot > > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > ./gdbserver 107.108.3.197:2020 ./threads > Process ./threads created; pid = 189 > Remote debugging from host 107.108.3.145 > Thread Loop count (1) > Thread Loop count (2) > Thread Loop count (3) > Thread Loop count (4) > Thread Loop count (5) > Thread Loop count (6) > Thread Loop count (7) > Thread Loop count (8) > %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% > > > Points to be clarified > ---------------------- > 1. What happened to debug messages from Main thread on the target? > 2. How to resolve the error messgae "Program received signal ?, Unknown > signal" came on the Host Side. > > Am I missing anything out in this case? > > > Thanks and Regards, > Balaram. > > > > > -- Daniel Jacobowitz MontaVista Software Debian GNU/Linux Developer